CN110454894A - A dew point indirect evaporative cooling air conditioning unit combined with heat pipe technology - Google Patents

Abstract

A dew-point indirect evaporative cooling air-conditioning unit combined with heat pipe technology disclosed in the present invention includes a casing, and air inlets and air supply ports are respectively arranged on the opposite side walls of the casing, and the inside of the casing is sequentially arranged according to the flow direction of the air after it enters. The primary filter, air blower, heat pipe heat exchange unit, dew point indirect evaporative cooler, the top wall of the shell above the heat pipe heat exchange unit is provided with a working air exhaust port, and a working air exhaust fan is provided in the working air exhaust port. Compared with the existing dew-point indirect evaporative cooling ventilation air-conditioning unit, the air-conditioning unit of the present invention can enhance the heat exchange between the air and the heat pipe, improve the heat exchange efficiency, and further reduce the energy consumption of the air-conditioning system.

Description

A dew point indirect evaporative cooling air conditioning unit combined with heat pipe technology

technical field

The invention belongs to the technical field of air-conditioning and refrigeration equipment, and in particular relates to a dew point indirect evaporative cooling air-conditioning unit combined with heat pipe technology.

Background technique

Nowadays, people spend about 60-80% of their time in buildings every day, and with the continuous improvement of people's living standards, the quality requirements for the environment in buildings are also getting higher and higher. The existing traditional mechanical refrigeration and air-conditioning methods are difficult to meet the requirements of high comfort. At the same time, under the national strategy of energy conservation and emission reduction, the use of renewable energy has attracted more and more attention. As an energy-saving and environment-friendly evaporative cooling ventilation and air-conditioning unit is also loved by people, so as to further meet people's requirements for air quality and achieve the purpose of energy saving and emission reduction.

Evaporative cooling air-conditioning technology uses water as the cooling medium to cool and dissipate heat through water evaporation and heat dissipation, and to produce cold air or cold water through direct or indirect contact between air and water. But in fact, when the indirect evaporative cooling chiller for producing cold water is used alone, it is prone to loss of electric energy, and it cannot fully utilize other energy sources to generate unnecessary waste.

Contents of the invention

The purpose of the present invention is to provide a dew-point indirect evaporative cooling air-conditioning unit combined with heat pipe technology. energy consumption of the air conditioning system.

The technical solution adopted in the present invention is a dew point indirect evaporative cooling air conditioning unit combined with heat pipe technology, which includes a housing, and the opposite side walls of the housing are respectively provided with an air inlet and an air supply port. In the flow direction, there are primary filter, air blower, heat pipe heat exchange unit, and dew point indirect evaporative cooler in sequence. The top wall of the corresponding housing above the heat pipe heat exchange unit is provided with a working air exhaust port, and a working air exhaust port is provided in the working air exhaust port. Air exhaust fan.

The present invention is also characterized in that,

An air valve a is arranged in the air inlet.

An air valve b is arranged in the air supply port.

The heat pipe heat exchange unit includes several heat pipes arranged vertically. The heat pipes are divided into the heat pipe cooling end and the heat pipe evaporation end arranged from top to bottom through the partition plate. The corresponding top wall of the housing above the heat pipe cooling end is provided with a working air exhaust tuyere.

The tube wall of each heat pipe at the cooling end of the heat pipe is provided with several vertical ribs, and the tube wall of each heat pipe at the evaporating end of the heat pipe is sleeved with several annular ribs.

Between every two adjacent heat pipes at the cooling end of the heat pipes, a plurality of flow-guiding partitions are arranged alternately up and down.

The dew point indirect evaporative cooler includes a water distributor, a cross-flow heat exchanger core and a water collection tank arranged in sequence from top to bottom. The water distributor is connected to the water collection tank through a circulating water pipe.

The water distributor includes a water distribution pipe, on which a number of evenly distributed nozzles are arranged, and the water distribution pipe is connected with the water collection tank through a circulating water pipe.

A circulating water pump and a water filter are arranged on the circulating water pipe.

The beneficial effects of the present invention are:

(1) The air-conditioning unit of the present invention improves the cooling capacity of the dew-point indirect evaporative cooler by recovering the cooling capacity of the working air in the dew-point indirect evaporative cooler, reduces the waste of cooling capacity, and then reduces the energy consumption of the air-conditioning system and saves energy;

(2) The air conditioner unit of the present invention uses the dew point indirect evaporative cooling principle to prepare cold air, and wet-cools the air below its wet-bulb temperature, breaking the limitation that the air can only be wet-cooled to its wet-bulb temperature, and fully utilizes the evaporative cooling technology cooling potential;

(3) The air conditioning unit of the present invention adopts a press-in type frequency conversion fan. Compared with the traditional suction fan, the fan of this form is in a dry area. Motor maintenance and repair, high fan operation efficiency;

(4) Compared with the traditional indirect evaporative cooler, the air-conditioning unit of the present invention can carry out cascade utilization of energy, obtain working air with continuously decreasing wet bulb temperature, and make the temperature of the output air passing through the dry channel approach the dew point temperature.

Description of drawings

Fig. 1 is a structural schematic diagram of a dew point indirect evaporative cooling air-conditioning unit combined with heat pipe technology according to the present invention;

Fig. 2 is a structural schematic diagram of the heat pipe in the heat pipe heat exchange unit of the air conditioning unit of the present invention.

In the figure, 1. Air inlet, 2. Air valve a, 3. Housing, 4. Primary filter, 5. Blower fan, 6. Heat pipe evaporation end, 7. Annular fin, 8. Heat pipe, 9. Partition plate , 10. Vertical wedge-shaped ribs, 11. Working air exhaust fan, 12. Working air exhaust outlet, 13. Baffle plate, 14. Cooling end of heat pipe, 15. Circulating water pipe, 16. Circulating water pump, 17. Water filter, 18. Water collection tank, 19. Dry channel, 20. Perforation, 21. Cross-flow heat exchanger core, 22. Wet channel, 23. Water distribution pipe, 24. Nozzle, 25. Damper b, 26 .Outlet.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

A dew point indirect evaporative cooling air conditioning unit combined with heat pipe technology according to the present invention, as shown in Figure 1-2, includes a housing 3, and the opposite side walls of the housing 3 are respectively provided with an air inlet 1 and an air supply port 26, and the housing 3. According to the flow direction of the air after entering, there are primary filter 4, blower 5, heat pipe heat exchange unit, dew point indirect evaporative cooler, and the top wall of the corresponding shell 3 above the heat pipe heat exchange unit is provided with working air exhaust. Port 12, the working air exhaust port 12 is provided with a working air exhaust fan 11, which can increase the exhaust air volume and improve the heat exchange effect.

An air valve a2 is arranged in the air inlet 1 .

A damper b25 is provided in the air outlet 26 .

The heat pipe heat exchange unit includes several heat pipes 8 arranged vertically. Several heat pipes 8 are divided into a heat pipe cooling end 14 and a heat pipe evaporation end 6 arranged from top to bottom through a partition plate 9. The heat pipe cooling end 14 is composed of several heat pipes 8. Composed of the upper half, the heat pipe cooling end 14 and the surrounding space form a cooling chamber; the heat pipe evaporation end 6 is composed of the lower half of several heat pipes 8, and the heat pipe evaporation end 6 and the surrounding space form an evaporation chamber; the heat pipe cooling end 14 The upper corresponding top wall of the housing 3 is provided with a working air outlet 12 .

The tube wall of each heat pipe 8 at the cooling end 14 of the heat pipe is provided with several vertical ribs 10, which can increase the heat exchange area between the exhaust air and the heat pipe 8 and improve the heat exchange effect; A plurality of annular ribs 7 are sleeved on the tube wall of the heat pipe 8, which can increase the heat exchange area between the air and the heat pipe 8 and improve the heat exchange effect.

Between every two adjacent heat pipes 8 at the cooling end 14 of the heat pipe, there are a number of flow guide partitions 13 interlaced up and down, so that the heat exchange path of the indoor exhaust air is increased and the heat exchange is enhanced. Such a setting can also achieve the effect of using hotter wind to cool the freshly entered outdoor air, and use cooler wind to cool the already cooled outdoor air, so as to achieve the effect of energy utilization step by step.

The dew point indirect evaporative cooler includes a water distributor, a cross-flow heat exchanger core 21 and a water collection tank 18 arranged in sequence from top to bottom. The water distributor is connected to the water collection tank 18 through a circulating water pipe 15 .

The water distributor includes a water distribution pipe 23 on which a number of uniformly distributed nozzles 24 are arranged, and the water distribution pipe 23 is connected with the water collection tank 18 through the circulating water pipe 15 .

The circulating water pipe 15 is provided with a circulating water pump 16 and a water filter 17; the circulating water pump 16 provides power to descale and purify the circulating water in the water collection tank 18 through the water filter 17, and then pass through the water supply pipe 15, the water distribution pipe 23 and the nozzle 24 in turn. The spraying operation is carried out, and the circulating water falls back to the inside of the water collection tank 18 after cooling the fresh air through the core body 21 of the cross-flow heat exchanger.

The cross-flow heat exchanger core 21 includes a plurality of dry channels 19 and wet channels 22 arranged in a staggered manner, and the dry channels 19 communicate with the wet channels 22 through perforations 20 .

The working process of the air conditioning unit of the present invention is as follows:

The outdoor fresh air enters the primary effect filter 4 through the air inlet 1, and after being filtered, the air passing through the primary effect filter 4 enters the evaporation chamber of the heat pipe heat exchange unit, and exchanges sensible heat with the heat pipe 8 with the annular fin 7 , the heat is transferred to the heat pipe 8, which is cooled by itself. And through the effect of heat pipe 8, heat is transferred to heat pipe cooling end 14 again, then the working air in the dew point indirect evaporative cooler is heated with the heat pipe cooling end 14 with vertical ribs 10 in the flow channel of the cooling chamber. Wet exchange takes away the heat from the cooling end 14 of the heat pipe and sends it to the outside through the working air exhaust fan 11.

The pre-cooled fresh air enters the dew point indirect evaporative cooler, the working air first enters the working air dry channel 19 to be cooled, and then enters the working air wet channel 22 through the perforation 20 . That is to say, the working air sequentially passes through the perforations 20 along the length direction of the plate, enters the wet channel 22 from the dry channel 19, and then the working air cools the air on the dry side by evaporating moisture on the wet surface of the plate.

The wet cooling step by step obtains the cold air approaching the dew point temperature of the primary air, and sends it into the indoor air-conditioning area through the air supply port 26.

Claims (9)

1. a kind of dew point indirect evaporative cooling air conditioning group of combination hot pipe technique, which is characterized in that include shell (3), institute State and be respectively arranged with air inlet (1) and air outlet (26) in shell (3) two lateral walls, in the shell (3) according to air into It is cooling that flow direction after entering is disposed with primary filter (4), pressure fan (5), heat pipe heat exchanging unit, dew point indirect evaporative Device, corresponding shell (3) roof is provided with control air exhaust outlet (12), the control air above the heat pipe heat exchanging unit Control air exhaust blower (11) are provided in exhaust outlet (12).

2. a kind of dew point indirect evaporative cooling air conditioning group of combination hot pipe technique according to claim 1, feature exist In the air inlet (1) is interior to be provided with air-valve a (2).

3. a kind of dew point indirect evaporative cooling air conditioning group of combination hot pipe technique according to claim 1, feature exist In the air outlet (26) is interior to be provided with air-valve b (25).

4. a kind of dew point indirect evaporative cooling air conditioning group of combination hot pipe technique according to claim 1, feature exist In the heat pipe heat exchanging unit includes several in the heat pipe being vertically arranged (8), and several heat pipes (8) pass through partition (9) point For the heat pipe colling end (14) and heat pipe evaporation ends (6) from top to bottom arranged, corresponding shell above the heat pipe colling end (14) Body (3) roof is provided with control air exhaust outlet (12).

5. a kind of dew point indirect evaporative cooling air conditioning group of combination hot pipe technique according to claim 4, feature exist In being provided with several vertical wedge fins (10), the heat on the tube wall of the every heat pipe (8) of the heat pipe colling end (14) Several annular fins (7) are socketed on the tube wall of the every heat pipe (8) of pipe evaporation ends (6).

6. a kind of dew point indirect evaporative cooling air conditioning group of combination hot pipe technique according to claim 5, feature exist In upper and lower between each adjacent two heat pipe (8) of the heat pipe colling end (14) to be staggeredly distributed with several diaphragms (13).

7. a kind of dew point indirect evaporative cooling air conditioning group of combination hot pipe technique according to claim 1, feature exist In, the dew point indirect evaporative cooler include the water distributor from top to bottom set gradually, cross flow heat exchanger core body (21) and Header tank (18), the water distributor are connect by circulating water pipe (15) with header tank (18).

8. a kind of dew point indirect evaporative cooling air conditioning group of combination hot pipe technique according to claim 7, feature exist In the water distributor includes water distributor (23), and several equally distributed nozzles (24), institute are provided on the water distributor (23) Water distributor (23) are stated to connect by circulating water pipe (15) with header tank (18).

9. a kind of dew point indirect evaporative cooling air conditioning group of combination hot pipe technique according to claim 7, feature exist In being provided with water circulating pump (16) and water filter (17) on the circulating water pipe (15).