CN2833396Y - Non-contact humidifying and dehumidifying device - Google Patents

Abstract

The utility model relates to a humidification and dehumidification device, in particular to a humidification and dehumidification device based on a hydrophobic polymer film. Non-contact humidification and dehumidification devices include liquid humidifiers and dehumidifiers. The liquid humidifiers or dehumidifiers are respectively connected to indoor and outdoor air. The liquid humidifiers or dehumidifiers include hydrophobic microporous membranes. Vinylidene fluoride, polytetrafluoroethylene, polyvinyl chloride, polyacrylonitrile, and polyethersulfone are made by dry-wet phase inversion method. The pore size is 0.15-5.0 μm. This humidification or dehumidification device effectively avoids direct contact between the air and the humidifier or dehumidifier, and can effectively prevent indoor furniture or equipment from being corroded by the humidifier or dehumidifier in the air. At the same time, the device has simple structure, low cost, safety and reliability, convenient maintenance, small device volume and wider application range.

Description

A non-contact humidification/dehumidification device

Technical field

The utility model relates to a humidification/dehumidification device, in particular to a non-contact air humidification/dehumidification device.

Background technique

In addition to temperature, humidity is another important indicator related to the comfort of the room. In summer, people need to dehumidify the indoor air; in winter, people need to humidify the indoor air. An environment with too high humidity or too low humidity will increase the discomfort of the human body, and will also cause a large number of certain viruses and bacteria to multiply inside the building. In addition, in the industry, whether many production processes can be carried out correctly depends largely on the humidity parameters, and many production processes have strict requirements on humidity.

At present, the most widely used humidification method is to use an ultrasonic nebulizer to humidify the air. It uses high-frequency current to emit ultrasonic waves with a certain intensity and wavelength equivalent to infrared wavelengths from the water to the water surface, so that the water surface produces small water columns in the form of water sprays, and fine particles of water are formed at the end of the water column. When the air passes by, these water The fine particles will absorb the sensible heat in the air and evaporate, and are sprayed into the indoor space by the fan together with the air, thereby increasing the moisture content and relative humidity of the air. The disadvantage of this humidification method is that the air is in direct contact with water, which can easily cause liquid water droplets to be entrained in the air, which will lead to the growth of bacteria and damage to the surface of the furniture layer after entering the room.

Traditional air dehumidification methods, also called dehumidification methods, include cooling method dehumidification, solid adsorbent dehumidification and liquid hygroscopic agent dehumidification. Cooling dehumidification is to cool the humid air below the dew point temperature, so that the water vapor in the air is condensed and removed from the air. Cooling dehumidification cannot achieve a very low dew point, it needs to consume a lot of energy to cool the air, condense the water vapor and take away the latent heat generated by vaporization. Solid adsorbent dehumidification is the use of certain solid adsorbents to absorb moisture for dehumidification. Certain solid adsorbents such as silica gel, alumina, calcium chloride, etc. have a strong adsorption effect on water vapor. When the humid air flows through the fluidized bed formed by these hygroscopic agents, the water vapor in the air is removed. , to achieve the purpose of dehumidification. The biggest disadvantage of solid adsorption dehumidification is that the regeneration of these solid adsorbents is difficult, and the moisture absorption and dehumidification devices are generally very complicated, the volume of the equipment is relatively large, and the cost is also high. These reasons limit their application to a certain extent. Liquid hygroscopic agent dehumidification is to use some hygroscopic solutions to absorb moisture in the air to achieve the purpose of dehumidification. Liquid dehumidification and regeneration are easy, but the disadvantage is that the air is in direct contact with the liquid hygroscopic agent, which can easily cause the air to entrain the hygroscopic agent, further causing corrosion of pipelines and equipment.

The notification number is CN1642837A Chinese Invention Patent Application Publication, which discloses a household air humidifying purifier. When the air humidifying purifier is working, the outside air is sucked by the fan at the inlet and then sent into the box through the air duct, passes through the water curtain spray and water medium filter device in the box, and then is discharged through the air outlet to obtain moist and clean air. Air. The notification number is CN165105103A Chinese Invention Patent Application Publication, which discloses a volatile air humidifier. The air humidifier is arranged on the top of the indoor unit of the split floor air conditioner. It is a humidifier that uses the rapid airflow generated in the indoor unit of the air conditioner to volatilize moisture. It is composed of a water storage tank, a water guide pipe, a drain valve and a water storage tank. Humidification water supply system.

The announcement number is CN16210564A Chinese Invention Patent Application Publication, which discloses a method and equipment capable of simultaneously dehumidifying and cooling air conditioning, that is, using a dehumidifying liquid to dehumidify, and simultaneously using a compression heat pump to cool the dehumidifying liquid, and then cooling the dehumidifying liquid while the dehumidifying liquid is dehumidifying. Air; the condensation heat from the compression heat pump is used to regenerate the desiccant fluid. The invention also relates to a multi-stage segmented dehumidifier (cooler) and regenerator, which realizes countercurrent heat and mass transfer and improves efficiency. The notification number is CN1609493A Chinese Invention Patent Application Publication Specification mentioning a kind of air dehumidification cooling device with heat recovery. The invention includes air dehumidifiers, indirect evaporative coolers and air-water heat exchangers consisting of multiple stages of desiccant templates and plate heat exchangers. The hot dry air dehumidified by the multi-stage air dehumidifier is cooled by the air-water heat exchanger through the cold water prepared by the indirect evaporative cooler which is lower than the temperature of the indoor return air humidity bulb. The water from the air-water heat exchanger is connected to the dehumidification outlet side plate heat exchanger in the multi-stage dehumidifier through pipes to cool the dehumidification solution and return to the indirect evaporative cooler. The indoor return air passes through the indirect evaporative cooler and becomes hot and humid air and is discharged outside.

The common disadvantage of the humidification and dehumidification devices disclosed in the above patents is that the treated air is in direct contact with the humidification and dehumidification agents, thus causing damage to indoor facilities.

Contents of Invention

The purpose of the utility model is to overcome the defects and deficiencies of the prior art, and provide a device that can satisfy the non-direct contact humidification and dehumidification of air, and realize the separation of the treated air and the desiccant solution.

The purpose of this utility model is realized by following scheme:

A non-contact humidification device, comprising a liquid humidifier, the liquid humidifier communicated with the indoor and outdoor respectively, the liquid humidifier includes a hydrophobic microporous membrane and a humidification chamber, and the hydrophobic microporous membrane is made of polyylidene fluoride Organic materials such as ethylene, polytetrafluoroethylene, polyvinyl chloride, polyacrylonitrile, and polyethersulfone are made by dry-wet phase inversion method, and the pore size is 0.15-5.0 μm. The hydrophobic microporous membrane is available on the market. The membrane separates the humidification chamber into two spaces closed up and down; the humidification chamber is located under the hydrophobic microporous membrane and is filled with pure water.

In order to better realize the purpose of humidification of the utility model, the humidification device also includes an air heater and a water storage tank, the air heater communicates with the outdoor air through an outdoor fan, and the air heater is also connected with the liquid humidifier ; The water storage tank is connected to the liquid inlet of the liquid humidifier through the solution pump, and the water storage tank is also connected to the liquid discharge port of the liquid humidifier.

A non-contact dehumidification device, comprising a liquid dehumidifier, the liquid dehumidifier communicated with the indoor and outdoor respectively, the liquid dehumidifier includes a hydrophobic microporous membrane and a dehumidification chamber, and the hydrophobic microporous membrane is made of poly Vinylidene fluoride, polytetrafluoroethylene, polyvinyl chloride, polyacrylonitrile, polyethersulfone and other organic materials are made by dry-wet phase inversion method, with a pore size of 0.15-5.0 μm. This hydrophobic microporous membrane is available in the market Yes, the membrane divides the dehumidification chamber into two spaces closed up and down; the dehumidification chamber is located under the hydrophobic microporous membrane and is filled with dehumidification liquid.

In order to better realize the dehumidification purpose of the utility model, the non-contact dehumidification device also includes a liquid regenerator, a cold liquid storage tank, a hot liquid storage tank, a heat exchanger and an evaporative cooler, and the liquid dehumidifier is obtained from The liquid discharge port is connected to the liquid inlet of the liquid regenerator through the cold liquid storage tank, the solution pump; the liquid regenerator passes through the liquid inlet of the hot liquid storage tank, heat exchanger, solution pump and liquid dehumidifier sequentially from the liquid discharge port port connection; the liquid dehumidifier is also communicated with the outdoor through the outdoor fan. The liquid regenerator includes a shell, an evaporation heater, a liquid inlet pipe and a spray head. It is fixed on the liquid inlet pipe in the inner cavity; the evaporation heater is fixed through the side shell, arranged in the inner cavity, and cooperates with the spray head. The heat exchanger is connected with the cooling water pipe. The dehumidifying liquid is one or a mixture of LiCl solution, LiBr solution and _CaCl2 solution.

The working principle of the utility model is:

(1) Liquid humidification process: through the fan, the outdoor air is sucked into the air heater, heated to room temperature, and enters the humidification chamber through the air inlet on the top cover of the humidification device. There is pure water in the humidification chamber, and the volatilized water The steam humidifies the air through the hydrophobic microporous membrane between the humidification chamber and the top cover. The humidified air is discharged from the exhaust port on the top cover, and then enters the room for use. The pure water in the humidification chamber should be added and replaced regularly.

(2) Liquid dehumidification process: through the fan, the outdoor air is sucked into the air dehumidification device, and enters the dehumidification chamber through the air inlet on the top cover of the dehumidification device. The dehumidification chamber contains a certain concentration of LiCl solution, LiBr solution and/or CaCl2, these solutions are highly hygroscopic as a dehumidifier, dehumidifying the air through a hydrophobic microporous membrane between the dehumidification chamber and the top cover. The dehumidified air is discharged from the exhaust port on the top cover, enters the evaporative cooler, adjusts to the required temperature, and then enters the room for use. Absorb the dehumidified liquid and turn it into a dilute solution, which is discharged through the liquid discharge port at the bottom of the dehumidification chamber and enters the cold liquid storage tank.

(3) Liquid regeneration process: start the solution pump, the liquid coming out from the cold liquid storage tank enters the liquid regeneration device through the action of the solution pump, and is sprinkled on the evaporation heater through the spray head ( The evaporation heater can not only use high-grade energy such as electric energy and steam, but also use low-grade energy such as solar energy and waste heat) for heating to realize liquid regeneration. The evaporated water is discharged to the outside through the exhaust port; the regenerated liquid returns to its original concentration, collects at the bottom of the shell, and is discharged through the liquid discharge port and enters the thermal liquid storage tank.

When humidifying, only the humidification process is run; when dehumidifying, the dehumidification process and the regeneration process are run simultaneously.

Compared with the prior art, the utility model has the following advantages:

(1) It can better realize the humidification or dehumidification of the air: in the existing liquid humidification and dehumidification system, due to the direct contact between the liquid and the air, when the air velocity is large, the air often entrains a certain amount of liquid droplets, These droplets can cause corrosion of equipment. The utility model overcomes this shortcoming, and can effectively prevent liquid droplets from entering the airflow by sandwiching a layer of hydrophobic microporous membrane between the top cover and the humidification/dehumidification chamber.

(2) Simple structure and low cost: Compared with the traditional device, the utility model has greatly reduced floor area and space volume, lighter equipment weight, miniaturization and indoorization of the whole system, greatly reduced investment, and safe device Reliable and easy to maintain.

Description of drawings

Fig. 1 is the structural representation of the non-contact humidifying device of the utility model hydrophobic polymer membrane;

Fig. 2 is a schematic structural diagram of a non-contact dehumidification device of a hydrophobic polymer membrane of the present invention;

Fig. 3 is a left side view of the humidifier shown in Fig. 1;

Fig. 4 is a cross-sectional view of the humidifier shown in Fig. 3 along the direction A-A;

Fig. 5 is a left side view of the dehumidifier shown in Fig. 2;

Fig. 6 is a sectional view of the dehumidifier shown in Fig. 5 along the B-B direction;

Fig. 7 is a longitudinal sectional view of the liquid regenerator shown in Fig. 2;

Fig. 8 is an SEM image of a polyvinylidene fluoride film. The figure shows an SEM image of a hydrophobic polyvinylidene fluoride membrane with a thickness of 98 μm and a pore diameter of 0.15 μm.

Detailed ways

The specific embodiment of the utility model will be described in further detail below in conjunction with the accompanying drawings, but the embodiment of the utility model is not limited thereto.

Example 1

For the humidification of home bedroom, the ground area is 15 square meters.

As shown in Figure 1, the humidifying device based on the hydrophobic polymer film of the present invention comprises a liquid humidifier 3, an air heater 2 and a water storage tank 6, and the liquid humidifier 3 is composed of an air inlet 7 and an air heater 2 Connected, the exhaust port 8 is communicated with the indoor air through the indoor fan 4, and the liquid humidifier 3 is also communicated with the water storage tank 6 through the liquid inlet 9 through the solution pump 5, and the liquid inlet 9 and the liquid outlet 10 are connected to the The water storage tank 6 communicates; the air heater 2 communicates with the outdoor air through the outdoor fan 1 . As shown in Figures 3 and 4, the liquid humidifier 3 includes a top cover 25, a humidification chamber 26, a hydrophobic microporous membrane 27, and a housing 28. The top cover is provided with an air inlet 7, an exhaust port 8, and a humidification chamber 26. A liquid inlet 9 and a liquid discharge 10 are provided, and the liquid discharge 10 is arranged at the bottom of the humidification chamber 26 . The air sent into the air heater 2 by the outdoor fan 1 is heated to room temperature, and the air coming out from the air heater 2 enters the liquid humidifier 3 through the air inlet 7 for humidification. During humidification, pure water is pumped from the water storage tank 6 through the solution pump 5 and flows into the humidification chamber 26 through the liquid inlet 9 . In the air humidification chamber, Fig. 8 is the SEM image of the hydrophobic polyvinylidene fluoride film with the lens distance from the sample 8mm, the electron beam signal is secondary electrons, the electron emission voltage is 10kV, and the magnification is 3000 times. The porous membrane 27 is made of polyvinylidene fluoride through a dry-wet phase inversion method, with a pore diameter of 0.15 μm and a thickness of 98 μm. The partial pressure of water vapor in the air above the hydrophobic microporous membrane 27 in the humidifying chamber 26 is lower than the partial pressure of the water vapor in the humidifying chamber at the lower part of the hydrophobic microporous membrane 27, forming a partial pressure difference. The air is humidified through the hydrophobic microporous membrane, and the humidified air is discharged into the room through the exhaust port 8 for utilization. During the humidification process, the non-volatile water flows back to the water storage tank 6 through the liquid outlet 10 for reuse. The device of the utility model has a good humidifying effect. After testing, at 20°C, the wet exchange efficiency reaches 88.1%. Moreover, due to the use of a hydrophobic membrane between the air and pure water, the direct contact between the air and water is avoided, so that the entrainment in the air The reduction of water droplets can effectively prevent indoor furniture or equipment from corrosion caused by water droplets in the air. In addition, the device of the utility model has small volume, light weight and low investment.

Example 2

The hydrophobic microporous membrane 27 is made of polyethersulfone through a dry-wet phase inversion method, with a pore size of 0.3 μm. other same

Example 1.

Example 3

The hydrophobic microporous membrane 27 is made of polyacrylonitrile through dry-wet phase inversion method, and the pore size is 0.3 μm. Others are with embodiment 1.

Example 4

To dehumidify the chemical laboratory, the floor area is 50 square meters.

As shown in Figure 2, the dehumidification device based on the hydrophobic polymer film of the present invention includes a liquid dehumidifier 12, a liquid regenerator 14, a cold liquid storage tank 20, a hot liquid storage tank 16, a heat exchanger 17 and an evaporative cooler 13. The liquid dehumidifier 12 is connected to the liquid inlet 36 of the liquid regenerator 14 from the liquid discharge port 24 through the cold liquid storage tank 20 and the solution pump 19; the liquid regenerator 14 passes through the hot liquid storage tank 16, The heat exchanger 17 and the solution pump 19 are connected to the liquid inlet 23 of the liquid dehumidifier 12; the liquid dehumidifier 12 is also communicated with the outside through the outdoor fan 11. The exhaust port 22 of the liquid dehumidifier 12 is connected to the evaporative cooler 13, and the exhaust port of the evaporative cooler 13 communicates with the indoor air. The air inlet 38 of the liquid regenerator 14 is connected to the outdoor fan 15, and the air outlet 39 is connected to the outdoor air. The heat exchanger 17 is connected with a cooling water pipe 18 .

As shown in FIG. 5 and FIG. 6 , the liquid dehumidifier 12 includes a top cover 29 , a dehumidification chamber 30 , a hydrophobic microporous membrane 31 , and a housing 32 . The top cover 29 is provided with an air inlet 21 and an air outlet 22 , and the dehumidification chamber is provided with a liquid inlet 23 and a liquid outlet 24 , and the liquid outlet 24 is arranged at the bottom of the dehumidification chamber 30 .

As shown in FIG. 7 , the liquid regenerator 14 includes a housing 33 , an evaporation heater 34 , a liquid inlet pipe 35 and a shower head 40 . The liquid inlet pipe 35 extends into the inner chamber 41 through the liquid inlet 36 provided on the upper side of the housing 33 , and the spray head 40 is arranged on the liquid inlet pipe 35 in the inner chamber 41 . The evaporation heater 34 is an electric heater, which is arranged in the inner cavity 41, cooperates with the shower head 40, and is fixed by the side shell. The liquid discharge port 37 is arranged at the bottom of the casing 33 ; the exhaust port 39 is arranged at the top of the casing 33 , and the air inlet 38 is arranged on the casing 33 .

When dehumidifying indoor air, the outdoor fan 11 sends air into the dehumidification chamber 30 through the air inlet 21 and is located on the top of the hydrophobic microporous membrane 31; The film 31 is lower and volatilized. The hydrophobic microporous membrane 31 is made of polyvinylidene fluoride through a dry-wet phase inversion method, and its structure is shown in FIG. 8 . Because LiCl solution has strong hygroscopicity, the partial pressure of water vapor in the air at the lower part of the hydrophobic microporous membrane 31 in the dehumidification chamber 30 is smaller than the partial pressure of the water vapor at the upper part of the hydrophobic microporous membrane 31 in the dehumidification chamber 30, which is located at the hydrophobic microporous membrane 31. The water molecules in the air on the upper part of the water-based microporous membrane 31 permeate to the other side of the membrane under the impetus of the pressure difference, and the LiCl solution absorbs the permeated water molecules, and the treated air enters the evaporative cooler 13 through the exhaust port 22 and is cooled to required temperature, and then discharged into the room for utilization. The liquid coming out of the dehumidification chamber 30 flows into the cold liquid storage tank 20 through the liquid outlet 24, and then the liquid is sent into the liquid regenerator 14 through the liquid inlet pipe 35 through the solution pump 19, and the dehumidification salt solution is sprayed through the spray head 40 to Heating on the evaporating heater 34, the regenerated liquid returns to the original concentration, collects at the bottom of the shell, flows into the hot liquid storage tank 16 through the liquid discharge port 37, and passes through the solution pump through the liquid inlet after heat exchange by the heat exchanger 17 23 is transported into the dehumidification chamber 30 for reuse, and the water droplets remaining in the housing 33 after evaporation are entrained by the air sent in by the fan 15 through the air inlet 38 and discharged outside through the exhaust port 39, and the cycle repeats. The utility model device has good dehumidification effect. At 20°C, the wet exchange efficiency can reach 88.8%. Since a hydrophobic film is used between the air and the dehumidification liquid, the direct contact between the air and the dehumidification liquid is avoided, so that the entrained air in the air The reduction of liquid droplets can effectively prevent the corrosion of equipment or pipelines caused by water droplets in the air. In addition, the device of the utility model has the advantages of small volume, light weight and low investment.

Example 5

The liquid desiccant in the dehumidification chamber 12 is LiBr solution, and the evaporation heater is a steam heater. The hydrophobic microporous membrane 30 is made of polyvinyl chloride through dry-wet phase inversion method, and the others are the same as in Embodiment 4.

Example 6

The liquid desiccant in the dehumidification chamber 12 is CaCl ₂ solution, the evaporation heater is a solar heater, and the hydrophobic microporous membrane 30 is made of polyacrylonitrile by dry-wet phase inversion method, and the others are the same as in Embodiment 4.

Example 7

The liquid desiccant in the dehumidification chamber 12 is a mixture of LiCl solution, LiBr solution and CaCl solution. The hydrophobic microporous membrane ₃₀ is made of polyvinyl chloride through a dry-wet phase inversion method. The evaporation heater is a steam heater. Others are the same Example 4.

Claims (7)

1, a kind of non-contact type humidifying device, comprise the liquid humidifier, described liquid humidifier is communicated with indoor and outdoors respectively, it is characterized in that, described liquid humidifier comprises hydrophobic microporous film and humidifying chamber, described hydrophobic microporous film is separated into two spaces of sealing up and down with humidifying chamber, and its aperture is 0.15～5.0 μ m; The humidifying chamber that is positioned at hydrophobic microporous film bottom is equipped with pure water.

According to the described damping device of claim 1, it is characterized in that 2, described damping device also comprises air heater and water storage box, described air heater is communicated with outdoor air by outdoor fan, and described air heater also is connected with the liquid humidifier; Described water storage box is connected with liquid humidifier inlet by solution pump, and described water storage box also is connected with liquid humidifier leakage fluid dram.

3, a kind of contactless dehumidifying device, comprise liquid dehumidifier, described liquid dehumidifier is communicated with indoor and outdoors respectively, it is characterized in that, described liquid dehumidifier comprises hydrophobic microporous film and removes moist chamber, described hydrophobic microporous film will be separated into two spaces of sealing up and down except that moist chamber, and its aperture is 0.15～5.0 μ m; The moist chamber that removes that is positioned at hydrophobic microporous film bottom is equipped with dehumidifying liquid.

4, by the described contactless dehumidifying device of claim 3, it is characterized in that: described dehumidifying liquid is LiCl solution, LiBr solution, CaCl ₂The mixed liquor of one or more in the solution.

5, dehumidifying device according to claim 3, it is characterized in that, this device also comprises the liquid regenerator, cold liquid reserve tank, hot liquid reserve tank, heat exchanger and devaporizer, and described liquid dehumidifier is connected with the inlet of liquid regenerator through cold liquid reserve tank, solution pump from the leakage fluid dram order; Described liquid regenerator is connected with the inlet of liquid dehumidifier via hot liquid reserve tank, heat exchanger, solution pump successively from leakage fluid dram; Described liquid dehumidifier also is communicated with outdoor by outdoor fan.

6, dehumidifying device according to claim 5, it is characterized in that, described liquid regenerator comprises housing, evaporation heater, feed tube and spray head, described feed tube extends in the inner chamber through the inlet that is located at liquid regenerator housing avris top, and spray head is fixed on the interior feed tube of inner chamber; Described evaporation heater cooperates with spray head, fixes by the avris housing, is arranged in the inner chamber.

7, dehumidifying device according to claim 5 is characterized in that, described heat exchanger is connected with cooling water pipe.

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