CN117387255A

CN117387255A - Air conditioning system, self-cleaning evaporation condensing system and control method

Info

Publication number: CN117387255A
Application number: CN202311339379.4A
Authority: CN
Inventors: 刘加春; 陈培生; 程琦; 黄洪乐; 王朴忠; 闫国杰
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-10-16
Filing date: 2023-10-16
Publication date: 2024-01-12

Abstract

The application relates to the field of air conditioners, in particular to an air conditioning system, a self-cleaning evaporative condensing system and a control method. The self-cleaning evaporation condensing system comprises a condenser, a fan assembly, a spraying water supply pipe, an electromagnetic valve and a variable-frequency water pump; the condenser is provided with an air inlet pipe assembly, a liquid outlet pipe and a heat exchange pipe assembly communicated with the air inlet pipe assembly and the liquid outlet pipe, an air suction port of the fan assembly is arranged towards the heat exchange pipe assembly, and the spraying assembly is used for spraying cooling water to the heat exchange pipe assembly; the variable-frequency water pump and the electromagnetic valve are connected in the spray water supply pipe, the electromagnetic valve is normally open in a spray cooling state, and the variable-frequency water pump operates at a first rotation speed, so that the spray assembly sprays cooling water to the heat exchange pipe assembly; the electromagnetic valve is periodically opened and closed in a descaling state, and the spraying assembly is matched with the variable-frequency water pump at a second rotating speed to realize high-pressure and excitation descaling of the heat exchange tube assembly. The self-cleaning evaporative condensing system can realize scale removal without stopping, improve the scale removal effect and improve the scale removal efficiency.

Description

Air conditioning system, self-cleaning evaporation condensing system and control method

Technical Field

The application relates to the field of air conditioners, in particular to an air conditioning system, a self-cleaning evaporative condensing system and a control method.

Background

The mine air conditioner generally adopts an evaporative condenser, and the surface of the evaporative condenser is easy to scale due to underground environmental factors, so that the heat exchange efficiency of a refrigerant in the evaporative condenser is severely restricted, and the refrigeration efficiency of the air conditioner is further influenced.

Current evaporative condensers are typically equipped with a descaling device, but suffer from the following disadvantages: the outer surface of the heat exchange tube is provided with fins or grooves, so that the energy efficiency is easily affected by scaling after long-term operation; the inner surface of the heat exchange tube only depends on increasing the size to increase the inner surface area for enhanced heat exchange, so that the material cost is increased; the scale cannot be found in time after scaling, so that the heat exchange efficiency is reduced; more importantly, the automatic cleaning cannot be realized, the machine can only stop for descaling, the descaling effect is not ideal, and the descaling efficiency is low, so that the utilization rate and the production efficiency of equipment are seriously affected.

Disclosure of Invention

The application provides an air conditioning system, a self-cleaning evaporative condensing system and a control method, which improve the descaling effect of an evaporative condenser and promote the descaling efficiency.

In a first aspect, the present application provides a self-cleaning evaporative condensing system comprising:

the condenser is provided with an air inlet pipe assembly, a liquid outlet pipe and a heat exchange pipe assembly communicated with the air inlet pipe assembly and the liquid outlet pipe;

The fan assembly is fixedly arranged relative to the condenser, and the exhaust port is arranged corresponding to the heat exchange tube assembly;

a spray assembly disposed opposite an outer surface of the condenser, configured to spray cooling water toward the heat exchange tube assembly;

the spray water supply pipe is connected with the spray assembly and used for conveying cooling water to the spray assembly;

a solenoid valve connected to the spray water supply pipe and configured to be periodically opened and closed in a descaling mode;

the variable-frequency water pump is connected to the spray water supply pipe, and is used for conveying cooling water for the spray assembly at a first rotating speed to spray and cool the heat exchange tube assembly, and conveying cooling water for the spray assembly at a second rotating speed to perform high-pressure flushing and descaling on the heat exchange tube assembly, wherein the second rotating speed is larger than the first rotating speed.

In some embodiments, the spray assembly comprises:

the upper spraying assembly is arranged above the condenser and is positioned between the condenser and the fan assembly;

and/or, a front spray assembly arranged on the first side surface of the side part of the condenser;

and/or a rear spray assembly disposed on a second side of the condenser opposite the first side.

In some embodiments, the upper spray assembly comprises:

a main pipeline connected with the spray water supply pipe;

the U-shaped branch pipe is connected with the main pipeline, and two ends of the U-shaped branch pipe extend to the outer sides of the first side face and the second side face of the condenser respectively;

The front water diversion pipe and the rear water diversion pipe are arranged in parallel and are respectively and vertically connected to the two ends of the U-shaped branch pipe;

the upper spray branch pipes are arranged in parallel and are vertically connected between the front water diversion pipe and the rear water diversion pipe;

and the first nozzle is connected with the upper spray branch pipe and is arranged towards the heat exchange pipe assembly.

In some embodiments, the front spray assembly and the rear spray assembly each comprise:

a water distribution main pipe is connected with a spray water supply pipe;

the side spraying branch pipes are arranged in parallel and are vertically connected with the water diversion main pipe;

and the second nozzle is connected with the side spraying branch pipe and is arranged towards the heat exchange pipe assembly.

In some embodiments, the first nozzles of adjacent upper spray branches are offset;

and/or the second nozzles of the adjacent side spray branch pipes are arranged in a staggered manner;

and/or the second nozzles of the spray branch pipes on the same layer side of the front spray assembly and the rear spray assembly are arranged in a staggered manner.

In some embodiments, the condenser comprises:

the front side plate is arranged on the first side surface of the front side plate;

a rear side plate provided on a second side surface opposite to the first side surface;

the gas-separating and liquid-collecting chamber is arranged on the third side surface of the gas-separating and liquid-collecting chamber;

the reversing chamber is arranged on a fourth side surface opposite to the third side surface;

the heat exchange tube assembly is connected with the gas-distributing and liquid-collecting chamber and the reversing chamber, and the gas inlet tube assembly and the liquid outlet tube are both connected with the gas-distributing and liquid-collecting chamber.

In some embodiments, the upper spray manifold is provided with a first joint, and the first nozzle is provided with a stud cavity screwed with the first joint;

the front side plate and the rear side plate are both provided with screw sleeves, the side spraying branch pipe is provided with a second joint, and the second nozzle comprises a first stud section matched with the second joint and a second stud section penetrating through the front side plate or the rear side plate and matched with the screw sleeves.

In some embodiments, the first nozzle and the second nozzle each comprise a truncated cone portion positioned at the tail end of the nozzle, a center spray hole is formed in the center of the truncated cone portion, and a plurality of radial spray holes are formed in the side face of the truncated cone portion along the circumferential direction.

In some embodiments, the central orifice and the radial orifice each include a transition section, a flow guiding section, and a diverging section;

the transition section, the flow guiding section and the diffusion section are sequentially arranged from the inside to the outside of the first nozzle or the second nozzle in an extending manner;

the transition section is gradually reduced from the inside of the first nozzle or the second nozzle to the outside, the diversion section is arranged in an equal diameter manner, and the diffusion section is gradually expanded from the inside of the first nozzle or the second nozzle to the outside.

In some embodiments, the gas and liquid separation chamber comprises:

the left sealing plate and the left side plate are mutually buckled to form a first closed cavity;

the first horizontal partition plate and the second horizontal partition plate are arranged in parallel and are vertically connected between the left sealing plate and the left side plate, and divide the first closed cavity into an upper-layer gas dividing area, a middle-layer first reversing area and a lower-layer liquid collecting area;

The air inlet pipe assembly is connected with the left sealing plate and communicated with the air dividing region, and the liquid outlet pipe is connected with the left sealing plate and communicated with the liquid collecting region;

the reversing chamber comprises:

the right sealing plate and the right side plate are mutually buckled to form a second closed cavity;

the third horizontal partition board is vertically connected between the right sealing plate and the right side plate and separates the second closed cavity to form a second reversing area on the upper layer and a third reversing area on the lower layer;

the heat exchange tube assembly is connected between the left plate and the right plate, the second reversing area is communicated with the gas separation area and the first reversing area through the heat exchange tube assembly, the first reversing area is communicated with the third reversing area through the heat exchange tube assembly, and the third reversing area is communicated with the liquid collecting area through the heat exchange tube assembly.

In some embodiments, the heat exchange tube assembly includes a plurality of profiled heat exchange tubes arranged parallel to one another and in an array; the lower part of the special-shaped heat exchange tube, which is away from the fan assembly, is in an arc shape, and the width dimension of the upper part of the special-shaped heat exchange tube, which is close to the fan assembly, is gradually increased from the direction close to the fan assembly to the direction far away from the fan assembly.

In some embodiments, the inner wall of the special-shaped heat exchange tube is provided with a spiral groove; and/or the special-shaped heat exchange tube has preset elastic deformation capacity.

In some embodiments, the self-cleaning evaporative condensing system meets at least one of the following:

The spray water supply pipe is provided with a flow detection device;

an unloading valve is arranged between the electromagnetic valve and the variable-frequency water pump through the spray water supply pipe;

the liquid outlet pipe is provided with a first temperature sensor;

a water receiving disc is arranged below the condenser;

the spray water supply pipe is provided with a second temperature sensor, and the water receiving disc is provided with a third temperature sensor;

the spray water supply pipe is provided with a filtering device;

the system further comprises a control module, wherein the control module is electrically connected with the first temperature sensor, the second temperature sensor, the third temperature sensor, the flow detection device, the unloading valve, the electromagnetic valve and the variable-frequency water pump.

In a second aspect, the present application provides an air conditioning system, employing a self-cleaning evaporative condensing system of any of the above.

In a third aspect, the present application provides a self-cleaning evaporative condensing system control method, applied to the self-cleaning evaporative condensing system, including:

detecting and judging whether the condenser is in a scaling state;

if yes, the variable-frequency water pump is controlled to be switched to a second rotating speed for operation, the electromagnetic valve is adjusted to be periodically opened and closed, and high-pressure excitation descaling of the spray assembly on the heat exchange tube assembly is achieved;

if not, maintaining the variable-frequency water pump to run at the first rotation speed, and adjusting the electromagnetic valve to be normally open so as to realize the spray cooling of the spray assembly on the heat exchange tube assembly.

In some embodiments, the step of detecting and determining whether the condenser is in a fouled state comprises:

detecting the real-time liquid outlet temperature t of the refrigerant at the liquid outlet pipe;

the real-time liquid outlet temperature t and the standard liquid outlet temperature t _m Comparing;

if t > t _m +Δt, determining that the condenser is in a fouled state;

wherein Δt is the allowable temperature deviation.

In some embodiments, the step of detecting the real-time liquid outlet temperature t of the refrigerant at the liquid outlet pipe and the step of controlling the variable-frequency water pump to switch to the second rotation speed operation further include:

the step of detecting the real-time liquid outlet temperature t of the refrigerant at the liquid outlet pipe and the step of controlling the variable-frequency water pump to switch to the second rotating speed for operation further comprise:

detecting the flow of cooling water, and if the flow of the cooling water deviates from the set flow, adjusting the flow of the cooling water to the set flow, and returning to the step of detecting the real-time liquid outlet temperature t of the refrigerant at the liquid outlet pipe;

detecting the temperature of cooling water conveyed to the spray assembly, if the temperature of the cooling water deviates from the set temperature, adjusting the temperature of the cooling water to the set temperature, and returning to the step of detecting the real-time liquid outlet temperature t of the refrigerant at the liquid outlet pipe;

detecting the rotating speed of the fan assembly, if the rotating speed of the fan assembly deviates from the set rotating speed, adjusting the fan assembly to the set rotating speed, and returning to the step of detecting the real-time liquid outlet temperature t of the refrigerant at the liquid outlet pipe;

When the flow of the cooling water, the temperature of the cooling water conveyed to the spray assembly and the rotating speed of the fan assembly do not deviate from set values, the control variable-frequency water pump is controlled to switch to a second rotating speed for operation, the electromagnetic valve is adjusted to be periodically opened and closed, and the spray assembly is used for achieving the high-pressure excitation descaling of the heat exchange tube assembly.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages: in the state that the condenser and the heat exchange tube assembly are not scaled, gaseous refrigerant flows into the heat exchange tube assembly from the compressor through the air inlet tube assembly to be condensed, and the condensed liquid refrigerant flows out of the liquid outlet tube and flows to the evaporator; in the process, the electromagnetic valve is normally open, the variable-frequency water pump supplies cooling water to the spraying assembly through the spraying water supply pipe at a lower first rotation speed, the spraying assembly sprays the cooling water to the heat exchange pipe assembly, and the heat exchange pipe assembly exchanges heat and then is matched with the fan assembly to take away heat. Under the scale formation state of the heat exchanger component, the electromagnetic valve is switched to a periodic opening and closing state, the variable-frequency water pump operates at a higher second rotating speed, the pressure of the cooling water sprayed to the heat exchange tube component by the spraying component is improved, high-pressure descaling is realized, the spraying component periodically sprays the cooling water by the periodic opening and closing of the electromagnetic valve, vibration excitation descaling of the heat exchange tube component is realized, and non-stop descaling is realized. The self-cleaning evaporative condensing system can realize high-pressure pulse and excitation descaling without stopping descaling, and remarkably improves descaling efficiency while guaranteeing descaling effect.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a schematic diagram of a self-cleaning evaporative condensing system provided in an embodiment of the present application;

FIG. 2 is a partial cross-sectional view of the condenser of FIG. 1;

FIG. 3 is a block diagram of the upper spray assembly of FIG. 1;

FIG. 4 is a block diagram of the front or rear spray assembly of FIG. 1;

FIG. 5 is a block diagram of the first nozzle of FIG. 3;

FIG. 6 is a block diagram of the second nozzle of FIG. 4;

FIG. 7 is a schematic view of the installation of the first nozzle of FIG. 3;

FIG. 8 is a schematic view of the installation of the second nozzle of FIG. 2;

fig. 9 is an enlarged view of a portion a in fig. 5;

FIG. 10 is a schematic view of the air intake assembly of FIG. 1;

FIG. 11 is a schematic view of the gas and liquid separation chamber of FIG. 1;

FIG. 12 is a schematic view of the reversing chamber of FIG. 1;

FIG. 13 is a longitudinal cross-sectional view of the heat exchange tube of FIG. 1;

FIG. 14 is a cross-sectional view of the heat exchange tube of FIG. 1;

FIG. 15 is a flow chart of a method for controlling a self-cleaning evaporative condensing system according to one embodiment of the present application;

FIG. 16 is a sub-flowchart of the self-cleaning evaporative condensing system control method provided in FIG. 15;

FIG. 17 is a flow chart of a method of controlling a self-cleaning evaporative condensing system according to another embodiment of the present application;

fig. 18 is a flowchart of a control method of a self-cleaning evaporative condensing system according to another embodiment of the present application.

Reference numerals illustrate:

a 100-condenser; 110-an air inlet pipe assembly; 111-a gas distribution main pipe; 112-a gas-dividing branch pipe; 120-liquid outlet pipe; 121-a first temperature sensor; 130-special-shaped heat exchange tubes; 131-elliptical segments; 132-cutting segments; 133-arc segments; 134-helical grooves; 140-front side plate; 141-a screw sleeve; 150-a gas separation and liquid collection chamber; 151-left sealing plate; 152-left side plate; 153-a first horizontal separator plate; 154-a second horizontal partition; 155-a first vertical separator; 156-a second vertical separator; 157-a gas separation zone; 158-a first commutation zone; 159-a liquid collection zone; 160-reversing room; 161-right seal plate; 162-right panel; 163-a third horizontal separator plate; 164-a third vertical separator; 165-a second commutation zone; 166-third commutation zone.

200-a fan assembly; 201-a fixed housing;

300-upper spray assembly; 310-main pipeline; 320-U-shaped branch pipes; 330-front water diversion pipe; 340-a post-water diversion pipe; 350-upper spray branch pipe; 360-first joint;

400-front spray assembly; 410-a water diversion main pipe; 420-side spray branch pipe; 430-a second linker;

500-a post-spray assembly;

600-first nozzle; 610—a central orifice; 620-radial nozzle holes; 621-transition section; 622-a deflector section; 623-a diffuser; 630-a first fastening portion;

700-a second nozzle; 710—first stud segments; 720-a second stud segment; 730-a second fastening portion;

800-spraying water supply pipe; 810-a variable-frequency water pump; 820-flow detection means; 830-unloading valve; 840-solenoid valve; 850—a second temperature sensor;

900-control module.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," "above," "front," "rear," and the like, may be used herein to describe one element's or feature's relative positional relationship or movement to another element's or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure experiences a position flip or a change in attitude or a change in state of motion, then the indications of these directivities correspondingly change, for example: an element described as "under" or "beneath" another element or feature would then be oriented "over" or "above" the other element or feature. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

In order to solve the technical problems that an evaporative condenser 100 of a mine air conditioner is easy to scale and low in descaling efficiency in the prior art, the application provides an air conditioning system, a self-cleaning evaporative condensing system and a control method, which can realize the continuous descaling of the condenser 100, and ensure and improve the descaling effect while remarkably improving the descaling efficiency.

As shown in fig. 1 and 2, the self-cleaning evaporative condensing system provided in the embodiment of the application mainly includes a condenser 100, a fan assembly 200, a spray assembly, a spray water supply pipe 800, an electromagnetic valve 840 and a variable frequency water pump 810. The condenser 100 is provided with an intake pipe assembly 110, a discharge pipe 120, and a heat exchange pipe assembly. The heat exchange tube assembly is communicated with the air inlet tube assembly 110 and the liquid outlet tube 120, and is used for exchanging heat with the external environment and sprayed cooling water to liquefy the gaseous refrigerant; the air inlet pipe assembly 110 is used for introducing high-pressure gaseous refrigerant discharged by the compressor, and the liquid refrigerant condensed by heat exchange is delivered to the evaporator by the liquid outlet pipe 120. The spray assembly is arranged opposite to the outer surface of the condenser 100 and is used for spraying cooling water to the condenser 100 and the heat exchange tube assembly thereof, water films are formed on the surfaces of the heat exchange tube assemblies through the cooling water and heat of a refrigerant is taken away by evaporation, an exhaust port of the fan assembly 200 is arranged towards the heat exchange tube assemblies, heat in air around the heat exchange tube assemblies is taken away, evaporation of the water films is accelerated, and heat exchange between the refrigerant and the external environment and the sprayed cooling water through the heat exchange tube assemblies is enhanced.

The spray water supply pipe 800 is connected to the spray assembly for supplying cooling water for spraying to the spray assembly, and the variable frequency water pump 810 and the solenoid valve 840 are connected to the spray water supply pipe 800. The variable-frequency water pump 810 is used for providing spraying power for cooling water, and the variable-frequency water pump 810 can adjust the rotating speed during operation to change the pressure of the spraying water; the solenoid valve 840 is used to control the shower water. In this embodiment, the self-cleaning evaporative condensing system is in an operational state in which the surfaces of the condenser 100 and the heat exchange tube assemblies are not fouled: the solenoid valve 840 is maintained in a normally open state, and the variable frequency water pump 810 is maintained to operate at a first rotational speed, which is relatively low in rotational speed, and spray water is continuously sprayed to the surface of the condenser 100 and the heat exchange tube assembly thereof through the spray assembly. After the surface of the condenser 100 and the heat exchange tube thereof are scaled, the electromagnetic valve 840 is adjusted to be periodically opened and closed, and the variable-frequency water pump 810 is adjusted to be kept to operate in a relatively high second rotating speed state, so that the pressure of the spray cooling water is increased to realize high-pressure spray descaling; meanwhile, the electromagnetic valve 840 is periodically opened and closed to realize intermittent water spraying of the spraying assembly and vibration excitation descaling. The spray assembly, the spray water supply pipe 800, the electromagnetic valve 840 and the variable frequency water pump 810 can realize scale removal without stopping, and the scale removal effect is improved in a mode of high-pressure pulse scale removal and excitation scale removal, so that the scale removal efficiency is remarkably improved.

The descaling principle is to realize efficient and timely descaling by utilizing high-pressure pulse water spray descaling and excitation descaling. When the compressive strength of the scale is sigma, the water spraying pressure is P1, and when the P1 is more than or equal to sigma, the scale generates cracks, and most of the scale falls off from the bonding surface under the impact of water spraying. When the descaling operation is performed, water spraying is intermittent, the water spraying time is T1, the water stopping time is T2, T1 is more than or equal to T2, and T1 and T2 can be set according to actual use conditions. Under the action of intermittent pulse water spraying exciting force, the heat exchange tube assembly vibrates to force the scale adhered on the heat exchange tube assembly to be separated completely.

It should be understood that the first rotational speed and the second rotational speed are not unique determined rotational speed values, and the first rotational speed and the second rotational speed can be adaptively adjusted according to requirements, corresponding to different temperature adjustment requirements of the air conditioning system and different scaling degrees of the heat exchange tube assembly. The period or frequency at which the solenoid valve 840 is opened and closed may also be adjusted as desired. The fan assembly 200 is typically an axial fan and is secured to the top of the condenser 100 by a stationary housing 201.

In a preferred embodiment provided herein, the spray assembly includes an upper spray assembly 300, a front spray assembly 400, and a rear spray assembly 500, and multi-angle spray cooling and descaling is achieved by means of the upper spray assembly 300, the front spray assembly 400, and the rear spray assembly 500. The upper spray assembly 300 is installed above the condenser 100 by fixing members such as a hoop or a clamp, and the fan assembly 200 is located above the upper spray assembly 300, that is, the upper spray assembly 300 is fixed between the fan assembly 200 and the condenser 100. The front spray assembly 400 is disposed on a first side of the condenser 100 and the rear spray assembly 500 is disposed on a second side of the condenser 100, the first and second sides being generally a pair of parallel opposing sides. The left and right sides of the condenser 100 are provided with the air inlet pipe assembly 110, the liquid outlet pipe 120, and the reversing side of the refrigerant, and generally no shower structure is provided.

In order to improve the spray cooling and descaling effects, the top-down water spray flow rate of the upper spray assembly 300 is Q1, the front spray assembly 400 is Q2 from front to back, the rear spray assembly 500 is Q3 from back to front, the relationship between the three is q2=q3, q1 is greater than or equal to K (q2+q3), K is a coefficient, and the value range is 9-10. Meanwhile, the outside of the heat exchange tube assembly circulates air from bottom to top under the drive of the fan assembly 200, so that the condensation heat of the refrigerant in the tube is transmitted to the air and the spray water finally through the condensation of the refrigerant, the heat exchange of the heat exchange tube assembly, the evaporation of the water film outside the tube.

It should be noted that the arrangement of the spray assembly is not limited to the above-mentioned structure of the upper spray assembly 300, the front spray assembly 400 and the rear spray assembly 500, and the upper spray assembly 300 or the front spray assembly 400 and the rear spray assembly 500 may be arranged on the front and rear sides of the condenser 100 on the premise of satisfying spray cooling and descaling.

Referring to fig. 1 and 3, in some embodiments, the upper spray assembly 300 includes a main pipe 310, a U-shaped branch pipe 320, a front water distribution pipe 330, a rear water distribution pipe 340, an upper spray branch pipe 350, and a first nozzle 600. The spray water supply pipe 800 is connected with the main pipe 310, the front spray assembly 400 and the rear spray assembly 500 through a multi-way joint; the main pipe 310 is vertically connected to the U-shaped branch pipe 320, the U-shaped branch pipe 320 extends in a direction substantially perpendicular to the first and second sides of the condenser 100, and both ends of the U-shaped branch pipe 320 extend to the outside of the first and second sides, respectively. The front water diversion pipe 330 and the rear water diversion pipe 340 are respectively fixed at a preset height above the first side and the second side of the condenser 100 by fixing members such as clips. And the front water diversion pipe 330 is disposed at the outer side of the first side of the condenser 100, the rear water diversion pipe 340 is disposed at the outer side of the second side of the condenser 100, and the front water diversion pipe 330 and the rear water diversion pipe 340 are vertically communicated with the U-shaped branch pipe 320, and the plurality of upper spray branch pipes 350 are mutually parallel and vertically connected between the front water diversion pipe 330 and the rear water diversion pipe 340. The first spray nozzles 600 are disposed at the lower surface of each upper spray manifold 350 facing the heat exchange tube assembly, and the first spray nozzles 600 of adjacent upper spray manifolds 350 are preferably disposed in a staggered manner.

Referring to fig. 1, 2 and 4, the front spray assembly 400 and the rear spray assembly 500 are generally identical in structure, and each includes a water distribution header 410, a side spray branch 420 and a second nozzle 700. In the previous description of the arrangement of the spray assembly 400, the water distribution header 410 is disposed at one end of the outer side of the first side of the condenser 100, the water distribution header 410 is movably connected to the spray water supply pipe 800 through a hose and a multi-way joint, the side spray branch pipes 420 are arranged in parallel with each other, and the plurality of groups of side spray branch pipes 420 are connected to the water distribution header 410 substantially vertically, the second nozzle 700 is disposed such that the side spray branch pipes 420 face one side of the first side of the condenser 100, and the water spray holes of the second nozzle 700 face the heat exchange pipe assembly. The second nozzles 700 of the upper and lower adjacent layer side spray branches 420 are preferably arranged in a staggered manner, and the second nozzles 700 on the same layer side spray branch 420 of the front spray assembly 400 and the rear spray assembly 500 are preferably arranged in a staggered manner. The arrangement is favorable for uniform water spraying, increases the contact area between the heat exchange tube assembly and water spraying, strengthens heat exchange and improves descaling effect.

Referring to fig. 1 and 2, the condenser 100 includes a front plate 140, a rear plate, a gas and liquid distribution chamber 150, a reversing chamber 160, and a heat exchange tube assembly. The front side plate 140 is positioned at a first side of the condenser 100 for mounting the second nozzle 700 of the fixed front spray assembly 400. The rear side plate is located at a second side of the condenser 100, the second side being disposed opposite to the first side, and the rear side plate is used to mount and fix the second nozzle 700 of the rear spray assembly 500. The plenum 150 is located on a third side of the condenser 100 generally perpendicular to the first and second sides and connects the front side plate 140 and the rear side plate, and the air inlet tube assembly 110 and the outlet tube 120 communicate with the plenum 150. The reversing chamber 160 is located on a fourth side of the condenser 100 and connects the front side plate 140 and the rear side plate, the fourth side is substantially perpendicular to the first side and the second side, i.e., is substantially parallel to the third side, and the reversing chamber 160 is used for reversing the refrigerant back to the gas-distributing plenum 150.

In order to improve spray cooling and descaling effects, the first nozzle 600 and the second nozzle 700 are constructed as shown in fig. 5, 6 and 9. The ends of the first nozzle 600 and the second nozzle 700 are respectively provided with a hollow round platform part, the round platform parts are used for processing spray holes, the spray coverage is increased, a water film dry area and a descaling dead area are eliminated, and heat exchange is enhanced. The center of the axial end of the truncated cone is provided with a central spray hole 610, and the side surface of the periphery of the truncated cone is provided with a plurality of radial spray holes 620 along the circumferential array. The number of the central spray holes 610 is at least 1; at least 3 radial spray holes 620 are arranged perpendicular to the side surface of the circular truncated cone, and are distributed in an array on the periphery of the central spray hole 610. The radial spray hole 620 forms a certain space angle with the central spray hole 610, and the size of the angle depends on the dislocation arrangement condition of the heat exchange tube assembly, so as to eliminate the water film dry area and the descaling dead area of the heat exchange tube assembly and strengthen heat exchange.

Further, the central spray hole 610 and the radial spray hole 620 each include a transition section 621, a diversion section 622 and a diffusion section 623, which sequentially extend from the inside to the outside of the nozzle, the transition section 621 is gradually tapered from the inside to the outside of the first nozzle 600 or the second nozzle 700, the diversion section 622 is provided with equal diameters, and the diffusion section 623 is gradually widened from the inside to the outside of the first nozzle 600 or the second nozzle 700, that is, the central spray hole 610 and the radial spray hole 620 are similar to venturi spray holes, so that the flow resistance is reduced and the spray diffusion angle is increased.

Referring to fig. 10 and 11, the gas-liquid separation and collection chamber 150 is used for uniformly distributing compressor discharge gas and collecting condensed refrigerant liquid; the air inlet pipe assembly 110 is a passage for exhaust gas to enter the gas-dividing and liquid-collecting chamber 150, and a one-dividing-two-to-gas-dividing main pipe 111 and a two-dividing-three connection mode for connecting the three gas-dividing branch pipes 112 by the gas-dividing main pipe 111 are adopted, so that uniform gas division is facilitated, and flow resistance is reduced; the front side plate 140 and the rear side plate are welded together with the gas-distributing and liquid-collecting chamber 150 and the reversing chamber 160 to form a frame, so that the frame plays a supporting and sealing role; the spray assembly is fixed on the frame structure through a bracket and a clamp.

In some embodiments, the gas and liquid separation chamber 150 includes a left seal plate 151, a left side plate 152, a first horizontal partition 153, a second horizontal partition 154, a first vertical partition 155, and a second vertical partition 156; the reversing chamber 160 then includes a right seal plate 161, a right side plate 162, a third horizontal partition 163, and a third vertical partition 164. The left sealing plate 151 and the left plate 152 are buckled in a butt joint manner to form a first closed chamber, the first horizontal separator 153 and the second horizontal separator 154 are horizontally arranged and are vertically connected between the left sealing plate 151 and the left plate 152, the first closed chamber is divided into an upper layer, a middle layer and a lower layer, the upper layer is a gas separation area 157, the middle layer is a first reversing area 158, and the lower layer is a liquid collecting area 159. The first vertical partition 155 is disposed vertically to the first horizontal partition 153 to divide the upper gas dividing area 157 into three gas dividing areas, and the three gas dividing branch pipes 112 are respectively connected to the three gas dividing areas through the left sealing plate 151. The second vertical partition 156 divides the first reversing area 158 into two reversing sub-areas, and the liquid outlet pipe 120 is communicated with the liquid collecting area 159 at the lower layer through the left sealing plate 151.

The right sealing plate 161 and the right plate 162 are mutually butted and buckled to form a second closed chamber, the third horizontal partition plate 163 is horizontally arranged and vertically connected between the right sealing plate 161 and the right plate 162, the second closed chamber is divided into an upper layer and a lower layer, the upper layer is a second reversing area 165, and the lower layer is a third reversing area 166. The third vertical partition 164 is disposed perpendicular to the third horizontal partition 163 and divides the second commutation area 165 into two commutation sub-areas. And the first reversing area 158, the second reversing area 165 and the third reversing area 166 are staggered up and down to a certain extent, the second reversing area 165 is communicated with the gas dividing area 157 and the first reversing area 158 through the heat exchange tube assembly, the first reversing area 158 is communicated with the third reversing area 166 through the heat exchange tube assembly, and the third reversing area 166 is communicated with the liquid collecting area 159 through the heat exchange tube assembly. The gaseous refrigerant enters from the air inlet pipe assembly 110, is divided into two parts and enters the gas distribution main pipe 111, is divided into three gas distribution subareas which are led to the gas distribution area 157 at the joint of the gas distribution main pipe 111 and the gas distribution branch pipe 112, flows to the second reversing area 165 through the heat exchange pipe assembly to realize the first reversing, enters the first reversing area 158 through the heat exchange pipe assembly to complete the second reversing after reversing, enters the third reversing area 166 through the heat exchange pipe assembly to complete the third reversing after reversing, and finally is conveyed to the evaporator through the liquid outlet pipe 120 after being gathered in the liquid collecting area 159.

The structure can realize uniform gas distribution of each heat exchange tube of the heat exchange tube assembly, uniform heat exchange and low flow resistance, and finally achieves uniform Wen Chuye. While the pressure bearing capacity of the gas and liquid distribution chamber 150 can be improved.

With further reference to fig. 5 to 9, the upper spray manifold 350 is provided with a first joint 360, the first joint 360 is provided with external threads, the first nozzle 600 is a cap-type nozzle having a threaded cavity that mates with the external threads of the first joint 360. In order to facilitate the installation of the first nozzle 600, the outer circumference of the first nozzle 600 is further provided with a first fastening portion 630, and the first fastening portion 630 is hexagonal, facilitating the installation of the first nozzle 600 to the upper spray manifold 350 by a wrench. The front side plate 140 and the rear side plate are provided with screw sleeves 141 in an array, the side spraying branch pipe 420 is provided with a second joint 430, the second joint 430 is provided with internal threads, the second nozzle 700 comprises a first stud segment 710 matched with the internal threads of the second joint 430, and a second stud segment 720 penetrating through the front side plate 140 or the rear side plate and matched with the screw sleeves 141. To facilitate the installation of the second nozzle 700, the second nozzle 700 further includes a second fastening portion 730 disposed between the first stud segment 710 and the second stud segment 720, the second fastening portion 730 also being hexagonal in shape for installation and fixation of the second nozzle 700 by a wrench.

In some embodiments, the reversing tube assembly is provided as shown in fig. 1, 2, 13 and 14, and includes a plurality of profiled heat exchange tubes 130 arranged in an array, with both ends of the profiled heat exchange tubes 130 being welded to the left side plate 152 and the right side plate 162. The special-shaped heat exchange tubes 130 are arranged up and down in layers, are arranged at equal intervals on the same layer, are arranged in a staggered manner on adjacent different layers, and three adjacent special-shaped heat exchange tubes 130 between two adjacent layers are in an isosceles (side) triangle shape. The heat exchange tube 130 is a round tube or a flat tube with a non-conventional shape, the lower part of the cross section of the heat exchange tube 130 is a circular arc tube, and the width of the upper part is gradually increased from top to bottom. The profiled heat exchange tubes 130 are each disposed with their smaller width dimension end toward the fan assembly 200.

Illustratively, the cross section of the profiled heat exchange tube 130 is composed of an elliptical arc + an arc + a tangent. The lower part of the cross section of the special-shaped heat exchange tube 130 is elliptical, and the major axis of the elliptical arc is horizontal; the upper part comprises an arc segment 133 and a tangent segment 132, the tangent segment 132 connecting the elliptical segment 131 and the arc segment 133. The arrangement can increase the orthogonal area of the air, water spray and the special-shaped heat exchange tube 130, reduce the influence of air wake flow, and is beneficial to water film formation and vaporization, so as to achieve the purposes of enhancing heat exchange and saving energy. The special-shaped heat exchange tube 130 is manufactured by adopting a metal material with better heat conductivity, corrosion resistance and strength. The outer surface of the coating is smooth and can effectively block the formation of scale. The spiral groove 134 is processed on the inner surface, so that the heat exchange area is increased, the heat exchange is enhanced, in addition, when the refrigerant flows near the wall surface, an additional vortex vertical to the main flow direction is generated, the thickness of a boundary layer is reduced, the thermal resistance is reduced, the temperature gradient between the laminar flow and the wall surface is increased, and the heat exchange is further enhanced. When the vortex is about to disappear, the refrigerant passes through the next spiral groove 134 again, a new vortex is generated, and the process is repeated, so that the stable reinforced heat exchange effect is maintained.

Meanwhile, when the refrigerant enters the spiral groove 134 and leaves the spiral groove 134, shrinkage and expansion movements are periodically generated, so that convection disturbance of fluid between the center and the near wall is promoted, and the effect of enhancing heat exchange is also achieved. The special-shaped heat exchange tube 130 has preset elasticity, and generates vibration under the action of pulse jet flow, and when the special-shaped heat exchange tube runs in an automatic cleaning mode, namely in a descaling state, the vibration can form strong vibration disturbance in and out of the viscous boundary layer of the special-shaped heat exchange tube 130, so that the heat exchange effect is greatly enhanced. The main structural parameters of the special-shaped heat exchange tube 130 are: total width l=25±2mm, total height h=16±1.5mm, arc radius r=2.5 to 3mm, tip angle α=25 to 35 ° mm, wall thickness δ=0.8±0.2mm, tip height h=0.4±0.1mm, pitch p=2 to 3mm of spiral groove 134.

In some embodiments, the spray water supply pipe 800 is provided with a flow detection device 820 to facilitate detection and adjustment of the flow of spray cooling water. The unloading valve 830 is arranged between the electromagnetic valve 840 and the variable-frequency water pump 810 of the spray water supply pipe 800, the unloading valve 830 is used for controlling the pressure of spray water, the safe operation of the system is ensured, and when the pressure in front of the electromagnetic valve 840 exceeds a set pressure value, the unloading valve 830 automatically opens for pressure relief. A water receiving disc is arranged below the condenser 100, spray water is received by the water receiving disc, and a water pumping port of the variable-frequency water pump 810 is connected with the water receiving disc, so that the spray water can be recycled. In addition, the spray water supply pipe 800 can be provided with a filtering device in front of the water receiving disc and the water pumping port of the variable-frequency water pump 810, so that spray water quality is improved, scale formation of impurities in spray water on the surface of the heat exchange tube assembly is reduced, and meanwhile, the service lives of the variable-frequency water pump 810 and the electromagnetic valve 840 can be prolonged.

On the basis of the above embodiment, the self-cleaning evaporative condensing system provided by the application further comprises a control module 900 and a temperature detection unit, and is electrically connected with the temperature detection unit, the flow detection device 820, the electromagnetic valve 840 and the variable frequency water pump 810 through the control module 900, so as to automatically judge whether the heat exchange tube is fouled or not and whether descaling is needed or not, and realize automatic cleaning and descaling of the system. The specific principle is as follows:

the temperature detection unit may be a first temperature sensor 121 disposed at the liquid outlet pipe 120, and the first temperature sensor 121 is used to detect the real-time liquid outlet temperature t of the liquid refrigerant and feed back to the control module 900, when the real-time liquid outlet temperature deviates from the set temperature by a certain value, it indicates that the heat exchange tube assembly has heat transfer degradation, that is, the surface of the heat exchange tube assembly has scaling phenomenon, and the control module 900 controls the electromagnetic valve 840 and the variable frequency water pump 810 to automatically switch to the descaling mode/the automatic cleaning mode for descaling.

The temperature detection unit not only can adopt the first temperature sensor 121 arranged at the liquid outlet pipe 120, but also can comprise the second temperature sensor 850 arranged at the spray water supply pipe 800 and used for detecting the temperature of spray cooling water conveyed to the spray assembly by the spray water supply pipe 800, and the third temperature sensor arranged at the water receiving disc and used for detecting the temperature of spray water after heat exchange, and the heat exchange condition of the refrigerant and the spray cooling water is judged by the temperature difference value detected by the second temperature sensor 850 and the third temperature sensor, so that whether the heat exchange pipe assembly has a scaling phenomenon is judged. For example, when the temperature difference detected by the second temperature sensor 850 and the third temperature sensor is smaller than the set value, it indicates that the heat exchange between the spray cooling water and the refrigerant through the heat exchange tube assembly is insufficient, that is, the surface of the heat exchange tube assembly has a scaling phenomenon. The control module 900 may implement relevant control logic using a PLC, a single chip microcomputer, or an industrial computer, which will not be described herein.

The self-cleaning evaporation condensing system has an automatic cleaning function, can monitor, analyze and judge scaling conditions in real time, realizes scale removal without stopping machine and timely scale removal, and greatly improves equipment utilization rate and production efficiency.

The heat exchange efficiency is effectively improved by utilizing the reinforced heat exchange in the tube of the special-shaped heat exchange tube 130, vibration disturbance and evaporation heat exchange of the water film outside the tube, adopting a tube chamber type efficient heat exchanger with a nozzle, a spraying assembly with uniform water spraying and the nozzle, and utilizing high-pressure pulse spraying excitation to remove scale, meanwhile, the heat exchange tube assembly and the nozzle with smaller flow resistance are utilized, the power consumption of a fan is reduced, and the comprehensive energy conservation is 20% -30%;

the upper spray assembly 300, the front spray assembly 400 and the rear spray assembly 500 can be connected through flexible connecting pipes to realize detachable and replaceable; the first nozzle 600 and the second nozzle 700 can be replaced independently, reducing maintenance costs. The staggered arrangement of the spray nozzles of the spray assembly and the arrangement of the central spray orifice 610 and the radial spray orifice 620 improves spray cooling and descaling uniformity.

The application provides an air conditioning system, including compressor, electronic reversing valve, choke valve, evaporimeter and the automatically cleaning evaporation condensing system that above-mentioned embodiment provided, air conditioning system connection structure and other partial setting reference prior art, this application is not repeated.

The application also provides a control method of the self-cleaning evaporative condensing system, which is suitable for the operation control of the self-cleaning evaporative condensing system provided by the embodiment. The control method is as shown in fig. 15, and includes:

step S100: detecting and judging whether the condenser 100 is in a scaled state;

step S200: if yes, the variable-frequency water pump 810 is controlled to be switched to the second rotating speed for operation, and the electromagnetic valve 840 is adjusted to be periodically opened and closed, so that the spray assembly is used for carrying out high-pressure excitation descaling on the heat exchange tube assembly;

step S300: if not, the variable-frequency water pump 810 is maintained to run at the first rotation speed, the electromagnetic valve 840 is regulated to be normally open, and the spraying component sprays and cools the heat exchange tube component.

The main principle of the method for detecting and judging whether the condenser 100 and the heat exchange tube assembly thereof are in a scaling state in step S100 is to judge whether the condenser 100 and the heat exchange tube assembly thereof are in heat transfer deterioration, i.e. scaling, by detecting the heat exchange condition of the refrigerant or the spray water.

In one possible embodiment, the process of detecting and determining whether the condenser 100 is fouled is as shown in fig. 16, and includes: step S101: the real-time liquid outlet temperature t of the refrigerant at the liquid outlet pipe 120 is detected, specifically, a first temperature sensor 121 can be arranged at the liquid outlet pipe 120 for detection; step S102: the real-time liquid outlet temperature t and the standard liquid outlet temperature t _m In contrast, if t > t _m +Δt, determining that the condenser 100 is in a fouled state; Δt is the allowable temperature deviation, so-called standard tapping temperature t _m The temperature of the refrigerant liquid when the spraying flow is constant, the ambient temperature is stable, the rotating speed of the fan assembly 200 is constant, and the condenser 100 has no scale, and the temperature can be obtained through historical data and stored in the control module 900. The detected real-time liquid outlet temperature t and the standard liquid outlet temperature t _m In contrast, if t > t _m And +Deltat, the real-time liquid outlet temperature t of the refrigerant is higher, the condensation heat exchange effect of the condenser 100 is poorer, and scaling phenomenon exists on the surfaces of the condenser 100 and the heat exchange tube components thereof.

In some embodiments, it is also possible to reflect whether or not there is a fouling phenomenon on the surface of the condenser 100 and its heat exchange tube assembly by detecting the change in water temperature before and after the spray cooling water exchanges heat with the heat exchange tube assembly. For example, a second temperature sensor 850 may be disposed at the spray water supply pipe 800 to detect the temperature of the spray cooling water supplied to the spray assembly, a third temperature sensor may be disposed at the water receiving tray to detect the temperature of the spray cooling water after heat exchange with the heat exchange pipe assembly, and a temperature difference between the cooling water and the cooling water before and after heat exchange with the heat exchange pipe assembly, that is, a difference between the detected temperatures of the second temperature sensor 850 and the third temperature sensor may be calculated, and when the difference is less than a standard difference, it indicates insufficient heat exchange between the cooling water and the refrigerant through the heat exchange pipe assembly, and scaling phenomenon may occur on the surfaces of the condenser 100 and the heat exchange pipe assembly thereof.

It is contemplated that the heat exchange efficiency of the refrigerant and the cooling water through the heat exchange tube assembly is related not only to whether or not the heat exchange tube assembly is fouled, but also to the ambient temperature, the flow rate of the cooling water, the temperature of the cooling water, and the rotational speed of the fan assembly 200. As shown in FIG. 17, when t > t is detected _m +Δt or second temperature transmissionThe difference between the detected temperatures of the sensor 850 and the third temperature sensor is smaller than the standard difference, and the method further comprises detecting the ambient temperature before the electromagnetic valve 840 and the variable frequency water pump 810 are controlled to execute the descaling mode, if the heat exchange effect of the refrigerant at the heat exchange tube assembly is not as good as expected due to the higher ambient temperature, performing scaling fault removal, not executing the descaling mode, and repeating the step S101 after the ambient temperature is restored to the set temperature range. Similarly, before the control of the solenoid valve 840 and the variable frequency water pump 810 to perform the descaling mode, the method further includes detecting the flow rate of the cooling water, detecting the temperature of the cooling water sprayed to the spray assembly by the spray water supply pipe 800, and detecting the rotation speed of the fan assembly 200, but after any one of the three values deviates from the set value, the descaling mode is not performed, and step S101 is repeatedly performed until the ambient temperature, the cooling water flow rate, the cooling water temperature, and the rotation speed of the fan assembly 200 are all restored to the normal range, and the step S101 determines that the scaling phenomenon exists, the control module 900 controls the solenoid valve 840 and the variable frequency water pump 810 to perform the descaling mode/the automatic cleaning mode.

In some embodiments, referring to fig. 18, the steps of detecting the real-time outlet temperature t of the refrigerant at the outlet pipe 120 and controlling the variable frequency water pump 810 and the solenoid valve 840 to switch to the descaling mode further include the steps of detecting the flow of cooling water, detecting the rotational speed of the fan assembly 200, and detecting the temperature of the cooling water. When the cooling water flow deviates from the set flow, the cooling water flow can be regulated and stabilized to the set flow by controlling the rotating speed of the variable-frequency water pump 810, and when the cooling water temperature transmitted to the spray assembly deviates from the set temperature, the cooling water can be cooled to the set temperature; when the rotational speed of the fan assembly 200 deviates from the set rotational speed, the fan rotational speed is adjusted to the set rotational speed.

When the flow rate of the cooling water, the temperature of the cooling water delivered to the spray assembly and the rotating speed of the fan do not deviate from the set flow rate, the set temperature and the set rotating speed, the step of detecting the real-time liquid outlet temperature t of the refrigerant at the liquid outlet pipe 120 is respectively returned to judge whether the heat exchange pipe assembly is scaled according to the real-time liquid outlet temperature t, and then the spray cooling mode or the descaling mode/automatic cleaning mode is executed according to the judgment of scaling. The cooling water flow rate detection, the rotation speed detection of the fan assembly 200 and the cooling water temperature detection are not sequenced.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-cleaning evaporative condensing system, comprising:

the fan assembly is fixedly arranged relative to the condenser, and the air suction opening is arranged corresponding to the heat exchange tube assembly;

a spray water supply pipe connected with the spray assembly and used for conveying cooling water to the spray assembly;

a solenoid valve connected to the shower water supply pipe and configured to be periodically opened and closed in a descaling mode;

The variable-frequency water pump is connected with the spray water supply pipe, and is used for conveying cooling water for the spray assembly at a first rotating speed to spray and cool the heat exchange tube assembly, and is used for conveying cooling water for the spray assembly at a second rotating speed to perform high-pressure washing and descaling on the heat exchange tube assembly, wherein the second rotating speed is larger than the first rotating speed.

2. The self-cleaning evaporative condensing system of claim 1, wherein the spray assembly comprises:

and/or, a front spray assembly, disposed on a first side of the condenser side;

3. The self-cleaning evaporative condensing system of claim 2, wherein the upper spray assembly comprises:

a main pipeline connected with the spray water supply pipe;

the U-shaped branch pipe is connected with the main pipeline, and two ends of the U-shaped branch pipe extend to the outer sides of the first side surface and the second side surface of the condenser respectively;

4. A self-cleaning evaporative condensing system according to claim 3, wherein the front spray assembly and the rear spray assembly each comprise:

a water distribution main pipe connected with the spray water supply pipe;

5. The self-cleaning evaporative condensing system of claim 4, wherein the first nozzles adjacent the upper spray manifold are offset;

and/or the second nozzles adjacent to the side spray branch pipe are arranged in a staggered manner;

and/or the front spraying assembly and the rear spraying assembly are arranged in a staggered manner with the second nozzles of the side spraying branch pipes.

6. The self-cleaning evaporative condensing system according to claim 4 or 5, wherein the condenser comprises:

The heat exchange tube assembly is connected with the gas-separating and liquid-collecting chamber and the reversing chamber, and the gas inlet tube assembly and the liquid outlet tube are both connected with the gas-separating and liquid-collecting chamber.

7. The self-cleaning evaporative condensing system of claim 6, wherein the first nozzle and the second nozzle each comprise a circular truncated cone portion at the end of the nozzle, a central spray hole is formed in the center of the circular truncated cone portion, and a plurality of radial spray holes are formed in the side face of the circular truncated cone portion along the circumferential direction.

8. The self-cleaning evaporative condensing system of claim 7, wherein the central orifice and the radial orifice each comprise a transition section, a flow guiding section, and a diffuser section;

the transition section is gradually reduced from the inside of the first nozzle or the second nozzle to the outside, the diversion section is arranged in a constant diameter mode, and the diffusion section is gradually expanded from the inside of the first nozzle or the second nozzle to the outside.

9. The self-cleaning evaporative condensing system of claim 6, wherein the vapor-separating and liquid-collecting chamber comprises:

the first horizontal partition plate and the second horizontal partition plate are arranged in parallel and are vertically connected between the left sealing plate and the left side plate, and the first closed cavity is divided into an upper-layer gas dividing area, a middle-layer first reversing area and a lower-layer liquid collecting area;

the liquid outlet pipe is connected with the left sealing plate and communicated with the liquid collecting area;

the reversing chamber includes:

the third horizontal partition plate is vertically connected between the right sealing plate and the right side plate and separates the second closed cavity to form a second reversing area on the upper layer and a third reversing area on the lower layer;

the heat exchange tube assembly is connected between the left side plate and the right side plate, the second reversing area is communicated with the gas dividing area and the first reversing area through the heat exchange tube assembly, the first reversing area is communicated with the third reversing area through the heat exchange tube assembly, and the third reversing area is communicated with the liquid collecting area through the heat exchange tube assembly.

10. The self-cleaning evaporative condensing system of claim 1, wherein the heat exchange tube assembly comprises a plurality of profiled heat exchange tubes arranged parallel to one another and in an array; the lower part of the special-shaped heat exchange tube, which deviates from the fan assembly, is in an arc shape, and the width dimension of the special-shaped heat exchange tube, which is close to the upper part of the fan assembly, is gradually increased from being close to the fan assembly to being far away from the direction of the fan assembly.

11. The self-cleaning evaporative condensing system of claim 10, wherein the inner wall of the profiled heat exchange tube is provided with a spiral groove; and/or the special-shaped heat exchange tube has preset elastic deformation capacity.

12. The self-cleaning evaporative condensing system of claim 1, wherein the self-cleaning evaporative condensing system meets at least one of the following:

the spray water supply pipe is provided with a flow detection device;

the spray water supply pipe is provided with an unloading valve between the electromagnetic valve and the variable-frequency water pump;

the liquid outlet pipe is provided with a first temperature sensor;

a water receiving disc is arranged below the condenser;

the water receiving disc is provided with a third temperature sensor;

the spray water supply pipe is provided with a filtering device;

The control module is electrically connected with the first temperature sensor, the second temperature sensor, the third temperature sensor, the flow detection device, the unloading valve, the electromagnetic valve and the variable-frequency water pump.

13. An air conditioning system, characterized in that a self-cleaning evaporative condensing system according to any one of claims 1-12 is applied.

14. A self-cleaning evaporative condensing system control method for a self-cleaning evaporative condensing system according to any one of claims 1-12, comprising:

detecting and judging whether the condenser is in a scaling state;

if yes, the variable-frequency water pump is controlled to be switched to a second rotating speed for operation, the electromagnetic valve is adjusted to be periodically opened and closed, and the spray assembly is used for achieving high-pressure excitation descaling of the heat exchange tube assembly;

if not, maintaining the variable-frequency water pump to run at a first rotation speed, and adjusting the electromagnetic valve to be normally open so as to realize the spray cooling of the spray assembly on the heat exchange tube assembly.

15. The method of claim 14, wherein the step of detecting and determining whether the condenser is in a fouled state comprises:

the real-time liquid outlet temperature t and the standard liquid outlet temperature t _m In contrast, if t > t _m +Δt, determining that the condenser is in a fouled state;

wherein Δt is the allowable temperature deviation.

16. The method of claim 15, wherein the step of detecting the real-time outlet temperature t of the refrigerant at the outlet pipe and the step of controlling the variable-frequency water pump to switch to the second rotation speed further comprise:

detecting the temperature of cooling water conveyed to the spray assembly, if the temperature of the cooling water deviates from a set temperature, adjusting the temperature of the cooling water to the set temperature, and returning to the step of detecting the real-time liquid outlet temperature t of the refrigerant at the liquid outlet pipe;

When the flow of cooling water, the temperature of the cooling water conveyed to the spray assembly and the rotating speed of the fan assembly do not deviate from set values, the method enters the step of controlling the variable-frequency water pump to switch to a second rotating speed for operation, and adjusting the electromagnetic valve to be periodically opened and closed, so that the spray assembly is used for carrying out high-pressure excitation descaling on the heat exchange tube assembly.