CN101699177B - Regenerative dehumidification heat exchanger - Google Patents

Abstract

The invention relates to a regenerative dehumidification heat exchanger in the technical field of refrigeration. The dehumidification heat exchanger includes a cooling system, a heating system, and a dehumidification heat exchange system. The dehumidification heat exchange system is further divided into a treatment area and a regeneration area. Three systems It is connected by pipes, the treatment area of the dehumidification heat exchange system is connected with the cooling system through pipes, and the regeneration area is connected with the heating system through pipes. Continuous dehumidification can be realized by switching between the dehumidification area and the regeneration area. In the present invention, the desiccant coating process is carried out on the heat exchanger or the metal sheet respectively, and then a regenerative dehumidification heat exchanger is obtained. The dehumidification heat exchanger uses the cooling water and hot water in the inner pipe to cool and heat the desiccant. The convective heat transfer coefficient is much higher than the gas convective heat transfer coefficient, which is beneficial to the dehumidification and regeneration of the desiccant, and the device size is more compact, which can improve the overall performance of the dehumidification heat exchanger.

Description

Regenerative dehumidification heat exchanger

The present invention is based on the patent application number: 200910045066.1, the patent application name is: "regenerative dehumidification heat exchanger and its manufacturing method", the patent applicant is: Shanghai Jiaotong University, and the patent application date is: January 8, 2009. Divisional application.

technical field

The invention relates to a heat exchanger in the technical field of refrigeration, in particular to a regenerative dehumidification heat exchanger.

Background technique

Air dehumidification technology mainly includes several methods of freezing dehumidification, compressed air dehumidification and desiccant dehumidification. The compressed air dehumidification method needs to compress the air, increase the partial pressure of water vapor, and separate the water vapor to obtain dry air after condensation. This method is effective for small air volumes, but it is not suitable for large air volumes. Freezing dehumidification is to reduce the air temperature to the dew point temperature, so that the moisture in the air is condensed to achieve the purpose of dehumidification. The performance of this method is stable, reliable, and can work continuously, and its application efficiency is high in high temperature and high humidity areas. Effective when the dew point is above 8°C to 10°C. However, refrigeration dehumidification also has the following disadvantages: (1) limited by the temperature of the cooling medium, cooling and dehumidification cannot provide low or ultra-low dew point air supply conditions; (2) temperature and humidity cannot be controlled separately. Humidity often needs to treat the air to a lower temperature first, and then heat the air to meet the temperature and humidity requirements of the air supply, which wastes more energy; (3) When the dew point required by the air supply is lower than -4°C , due to the frosting problem of the evaporator of the conventional refrigeration system, the operating efficiency of the equipment will be greatly reduced, and the energy consumption will be greatly increased.

Desiccant dehumidification mainly uses the excellent hygroscopic properties of desiccant to meet the purpose of dehumidification. Desiccant dehumidification mainly includes solid dehumidification and liquid dehumidification. Solid dehumidification uses the capillary action of porous media to absorb moisture in the air onto the desiccant. Solid dehumidification includes fixed bed dehumidification and rotary dehumidification. The solid dehumidification equipment is simple, and it can still have a good dehumidification effect under low humidity. It can treat the air to a lower dew point, which can reach -40 ° C ~ -60 ° C, and the combination of desiccant dehumidification technology and cold coil can achieve The temperature and humidity are controlled separately, which improves the indoor air quality. Liquid dehumidification adopts the spraying of liquid desiccant aqueous solution such as lithium chloride to absorb moisture. Desiccant dehumidification can use low-grade heat energy such as solar energy and waste heat. It overcomes the shortcomings of large power consumption shared by refrigeration dehumidification and compressed air dehumidification. The system has a large ventilation volume and the desiccant can remove pollutants in the air. air quality. However, drying and dehumidification also have disadvantages: in the dehumidification process, when the desiccant absorbs water, it will release a large amount of heat of adsorption. The heat of adsorption will increase the temperature of the desiccant and cause the ability of the desiccant to absorb water. The temperature of the processing air increases, which increases the energy consumption for cooling the processing air.

After searching the literature of the prior art, it was found that in order to solve the problem that the adsorption heat increases the temperature of the desiccant and causes the desiccant’s ability to absorb moisture to decrease, Yuan Weixing, Zheng Yi, et al. of Beihang University [Internal Cooling Compact Type Experimental research on solid dehumidifiers, Journal of Beijing University of Aeronautics and Astronautics, September 2006, p. 1101] Research and manufacture of paste-type internal cooling compact cross-flow dehumidifiers. The structural form and heat exchange principle of the dehumidifier are similar to the cross-flow plate-fin heat exchanger belonging to the compact heat exchanger. It is an improved form of the ordinary fixed-bed dehumidifier. It pastes silica gel particles on the main side of the dehumidifier to process the airflow. On the fins of the flow channel, considering that silica gel has a high heat of adsorption when it absorbs moisture, the flow channel on the main side is cooled by airflow on the secondary side of the dehumidifier. Compared with the rotary dehumidifier, the cooling effect of the secondary side is obvious , which effectively solves the problem of heat of adsorption of the moisture absorbent. Experiments show that the dynamic moisture absorption rate of the silica gel in the dehumidifier is as high as 12.4%. However, this kind of dehumidifier has a large volume. Compared with conventional desiccant dehumidifiers, the amount of gluing per unit volume is less (the total mass of the metal structure is 18.6kg, and the total mass of silica gel is 1.9kg), and the installation of the cross-flow dehumidifier is more difficult. In addition, the gas convective heat transfer coefficient is low, which is also not conducive to the dehumidification/regeneration of the desiccant.

Contents of the invention

The object of the present invention is to overcome the above-mentioned deficiencies in the technology and provide a regenerative dehumidification heat exchanger. The invention adopts metal surface desiccant coating technology, which has the characteristics of easy processing, low cost, easy installation, etc., and can be used as a cooling heat exchanger at the same time, and can also play a cooling role while dehumidifying the treated air. The comprehensive energy utilization efficiency of the device is high, and it can also effectively improve the indoor air quality. It is an energy-saving and environmentally friendly dehumidification and heat exchange technology.

The present invention is achieved through the following technical solutions:

The manufacturing method of the regenerative dehumidification heat exchanger involved in the present invention is any one of the following two types:

The first type: the manufacturing method of the regenerative dehumidification heat exchanger includes the following steps:

①Apply the adhesive on the clean tube-fin heat exchanger, and remove the excess adhesive through a compressed air machine, so that a uniform thin layer of adhesive is formed on the surface of the tube-fin dehumidifier.

②Apply the solid powder desiccant evenly on the adhesive, the purpose is to solidify the desiccant particles on the surface of the heat exchange fins to meet the moisture absorption requirements.

③Dry the heat exchanger coated with desiccant particles to ensure that the adhesive and solid powder desiccant are well combined.

④According to the set dehumidification effect, the heat exchanger can be selected to be coated with desiccant again to generate a strengthened desiccant hygroscopic surface. Here, the desiccant can be made of a material different from the desiccant in ②, and the second type of desiccant is used for surface strengthening treatment to improve the hygroscopicity of the dehumidification component in order to improve the dehumidification performance of the component.

⑤ Perform drying treatment on the heat exchanger after the process to ensure that the desiccant particles are fixed on the heat exchanger to obtain a dehumidification heat exchanger.

The second type: the manufacturing method of the regenerative dehumidification heat exchanger includes the following steps:

①Apply the adhesive on a clean metal sheet to form a uniform thin layer of adhesive on the surface of the metal sheet.

②Apply the solid powder desiccant evenly on the adhesive, the purpose is to solidify the desiccant particles on the surface of the heat exchange fins to meet the moisture absorption requirements.

③Dry the metal sheet coated with desiccant to ensure that the adhesive and solid powder desiccant are fixed on the metal sheet.

④According to the set dehumidification effect, you can choose to apply desiccant to the treated metal sheet again to generate a strengthened desiccant hygroscopic surface. Here, the desiccant can be made of a material different from the desiccant in ②, and the second type of desiccant is used for surface strengthening treatment to improve the hygroscopicity of the dehumidification component in order to improve the dehumidification performance of the component.

⑤ Carry out drying treatment to the metal sheet that has passed through the process, to ensure that the desiccant particles are fixed on the metal sheet.

⑥The dehumidification heat exchanger is made of metal sheets and metal tubes, and the structural form and heat exchange principle of the dehumidification heat exchanger are the same as those of the tube-fin heat exchanger belonging to the compact heat exchanger.

The adhesive described in the above two production methods can be a latex adhesive, but the application is not limited to this adhesive.

The desiccant material described in the above two production methods can be silica gel, molecular sieve, alumina, but the application is not limited to the above desiccant.

The dehumidification heat exchanger manufactured by the above method of the present invention can also play the role of cooling down while dehumidifying the treated air. The comprehensive energy utilization efficiency of the device is high, and the indoor air quality can be effectively improved. It is an energy-saving and environmentally friendly Dehumidification and heat exchange technology.

By adopting the above two methods, the manufacture of the dehumidification heat exchanger can be completed in simple steps. The dehumidification heat exchanger has good dehumidification effect, simple structure and low price.

In the present invention, the desiccant used in the dehumidification heat exchanger can be regenerated with a low-grade heat source (50-90° C.), and the waste heat of the air conditioner condenser, solar hot water and hot air can be used for device regeneration. Commonly used desiccants include silica gel, molecular sieves, alumina, etc.

The regenerative dehumidification heat exchanger involved in the present invention is divided into three systems: a cooling system, a heating system, and a dehumidification heat exchange system. The three systems are connected through pipelines, and the treatment area of the dehumidification heat exchange system is connected with the cooling system through pipelines. The regeneration zone is connected to the heating system through pipes.

The dehumidification heat exchange system includes a treatment area and a regeneration area.

The treatment area includes: a two-way fan, a dehumidification heat exchanger and an air regulating valve. The connection method is: one end of the two-way fan leads to the outside, the other end is connected to the dehumidification heat exchanger through the air pipe, the other end of the dehumidification heat exchanger is connected to the air regulating valve, and the other end of the air regulating valve is connected to the air supply port. The processing wind or mixed wind is sent into the room under the action of the two-way fan.

The regeneration zone includes: a two-way fan, a dehumidification heat exchanger and an air regulating valve. The connection method is: one end of the two-way fan leads to the outside, the other end is connected to the dehumidification heat exchanger through the air pipe, the other end of the dehumidification heat exchanger is connected to the air regulating valve, the other end of the air regulating valve is connected to the return air port, and the exhaust air absorbs The moisture evaporated from the dehumidification heat exchanger is discharged to the outside under the action of the two-way fan.

The two-way fan described above is a fan that can supply air in both positive and negative directions through switch switching, and each two-way fan can also be replaced by two one-way fans, but the installation positions of the two one-way fans are determined by the arrangement of the air ducts Condition.

The working principle of the present invention is: (1) During the cooling season of the air conditioner, the heat medium is passed through the tube in the dehumidification heat exchanger to continuously heat the desiccant, and the moisture of the desiccant is released and taken away by the exhaust, that is, regeneration; After the regeneration is complete, the inner tube of the desiccant heat exchanger is connected with a cooling medium, which can take away the heat of adsorption released by the desiccant when it absorbs water, so as to maintain a lower partial pressure of water vapor on the surface of the desiccant to absorb moisture in the air, that is, dehumidification effect. Under the standard summer working conditions, the air supply treated by the dehumidification heat exchanger can achieve lower temperature and proper moisture content. (2) During the heating season, adjust the regeneration air to a suitable temperature and humidity state and send it indoors; the processing air is discharged outdoors.

The desiccant heat exchanger of the present invention uses the cooling water and hot water in the inner tube to cool and heat the desiccant. The convective heat transfer coefficient of water is much higher than the gas convective heat transfer coefficient, which is beneficial to the dehumidification and regeneration of the desiccant. The size of the device is also small. It is more compact and can improve the overall performance of the dehumidification heat exchanger.

Compared with the existing desiccant dehumidification technology, the present invention has the following advantages and effects: (1) The manufacturing process of the dehumidification heat exchanger is simple and the price is cheap. (2) The heat exchanger dehumidification system has a simple structure, is easy to install, and has low equipment investment costs. (3) The structure is compact, and the desiccant coating amount per unit volume of the dehumidification heat exchanger is increased. (4) Under the same working conditions and geometric structure conditions, the convective heat transfer coefficient of water is much higher than the gas convective heat transfer coefficient, which is beneficial to the dehumidification and regeneration of the desiccant, thereby improving the overall performance of the dehumidification heat exchanger system .

Description of drawings

Fig. 1 is a schematic diagram of a manufacturing method of a dehumidification heat exchanger.

Fig. 2 is a schematic diagram of the second process of the manufacturing method of the dehumidification heat exchanger.

Fig. 3 is a schematic cross-sectional view of the fin coating of the dehumidification heat exchanger shown in Fig. 1 and Fig. 2 .

Fig. 4 is a schematic diagram of a dehumidification process based on a regenerative desiccant heat exchanger that can utilize a low-grade heat source according to the present invention.

Fig. 5 is a schematic diagram of the heat pump dehumidification process based on a regenerative dehumidification heat exchanger that can utilize low-grade heat sources according to the present invention.

Detailed ways

The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

Example 1

The manufacturing method of the regenerative dehumidification heat exchanger involved in this embodiment is shown in Figures 1 and 3:

In the cleaning and drying process (S1), the tube-fin heat exchanger 1 with a specification of 202×168×25mm and a fin spacing of 1mm and the tube-fin heat exchanger 2 with a specification of 202×168×25mm and a fin spacing of 0.5mm Clean it and dry it with an electric constant temperature blast drying oven at a drying temperature of 40°C ± 0.2°C. After drying, the masses of heat exchanger 1 and heat exchanger 2 are 483.58g and 513.78g, respectively. After the dried tube-fin heat exchanger is placed in the room to cool naturally, in the adhesive coating process (S2), it is coated with adhesive, and after coating, the excess adhesive is removed with a compressed air machine In order not to block the heat exchange air passage, a uniform thin layer of adhesive with a thickness of about 0.1 mm is formed on the surface of the tube-fin dehumidifier. Expose the tube-fin heat exchanger treated by the coating adhesive process (S2) to the air for about 10 minutes to evaporate part of the moisture in the adhesive, and then perform the coating solid desiccant powder process (S3), which can Sprinkle the silica gel solid powder evenly on the adhesive, the purpose is to solidify the desiccant particles on the surface of the heat exchange fins to meet the moisture absorption requirements. Then through the first drying process (S4), the heat exchanger coated with desiccant particles is dried to ensure that the adhesive and the solid powder desiccant are well combined. The drying temperature is 100°C ± 0.2°C. until the quality remains the same. The masses of the heat exchanger 1 and the heat exchanger 2 were 520.29g and 553.87g after being dried in the first drying process (S4).

According to the set dehumidification effect, apply the second type of desiccant to the heat exchanger (S5): the heat exchanger after the first drying process (S4) is further coated with an adhesive to cure the desiccant, Its purpose is to use the second type of desiccant (which can be the same as or different from the first type of desiccant) for surface strengthening treatment to improve the hygroscopicity of the dehumidification component so as to improve the dehumidification performance of the component. Finally, the heat exchanger that has passed through the process is dried through the second drying process (S6), and the drying temperature is 100°C ± 0.2°C to ensure that the desiccant particles are fixed on the heat exchanger, thereby obtaining dehumidification. Finished heat exchanger.

According to the set amount of desiccant, the process of applying the second type of desiccant (S5) and the second drying process (S6) must be repeated several times. Due to the difference in the fin pitches of the two heat exchangers, finally, the masses of heat exchanger 1 and heat exchanger 2 filled with desiccant are 673.54g and 638.97g respectively.

By installing the dehumidification heat exchanger 1 and the dehumidification heat exchanger 2 made by the above method in series in the air duct, the experiment shows that: when the outdoor temperature and humidity are 26.2°C and 65.5% respectively, the dehumidification heat exchanger 1 Cold water at 25.5°C is passed through the inner pipe of the dehumidification heat exchanger 2, the air volume is 183.24m3 and h, and the maximum dehumidification air volume at the regeneration temperature of 60°C, 70°C and 80°C is 6.266g and kg, 10.972g and kg respectively 11.167g and kg.

Example 2

The manufacturing method of the regenerative dehumidification heat exchanger involved in this embodiment is shown in Figure 2.3:

In the cleaning and drying process (S1), the metal sheet with a thickness of about 0.2mm and a mass of 1.00g is cleaned and dried in an electric constant temperature blast drying oven at a drying temperature of 40°C±0.2°C. Put the dried tube-fin heat exchanger in the room to cool naturally, and then carry out the adhesive coating process (S2), and then use a compressed air machine to remove the excess adhesive to form a uniform layer on the surface of the metal sheet. A thin layer of adhesive with a thickness of approximately 0.1 mm. Expose the metal sheet after the process of coating the adhesive (S2) to the air for about 10 minutes to evaporate part of the moisture in the adhesive, and then carry out the process of coating the solid desiccant powder (S3), and the silica gel solid powder Evenly sprinkled on the adhesive, the purpose is to solidify the desiccant particles on the surface of the metal sheet to meet the moisture absorption requirements. Then through the first drying process (S4), the metal sheet coated with desiccant particles is dried to ensure that the adhesive and the solid powder desiccant are well combined. The drying temperature is 100°C ± 0.2°C until quality remains the same. The mass of the metal sheet after drying through the first drying process (S4) is 2.07g.

According to the set dehumidification effect, apply the second type of desiccant to the heat exchanger (S5): further solidify the desiccant by coating the adhesive, the purpose is to use the second type of desiccant (which can be The same or different desiccant) surface strengthening treatment is used to improve the hygroscopicity of the dehumidification component in order to improve the dehumidification performance of the component. Finally, the second drying process (S6) is used to dry the metal sheet through the process, and the drying temperature is 100°C±0.2°C, so as to ensure that the desiccant particles are fixed on the metal sheet.

According to the set amount of desiccant, the process of applying the second type of desiccant (S5) and the second drying process (S6) must be repeated several times. Finally, the mass of the metal sheet after the desiccant is applied is 2.90 g.

The size and shape of the metal sheet can be determined according to the needs, and the metal sheet and the metal tube are assembled into a finished dehumidification heat exchanger through the process (S7).

Experiments show that the moisture absorption rate of the metal sheet manufactured by the above method is as high as 13.33%.

Example 3

The specific structure of the regenerative dehumidification heat exchanger involved in this embodiment is shown in FIG. 4 , the cooling system is a cooling tower system 1 , and the heating system is a solar heat collector system 2 .

This embodiment includes: a cooling tower system 1, a solar collector system 2, and a dehumidification and heat exchange system 3, wherein the dehumidification and heat exchange system 3 is further divided into a regeneration area 33 and a treatment area 32, and the three systems are connected by water pipes.

The cooling tower system 1 includes: a cooling tower 4 , a water pump 5 , a sprinkler 6 , a water pump 7 , a valve 8 , and a cold water tank 9 . The connection relationship is: one end of the water pump 5 is connected to the cold water tank 9 through a water pipe, the other end of the water pump 5 is connected to the cooling tower 4, the other end of the cooling tower 4 is connected to the valve 8, and the other end of the valve 8 is connected to the cold water tank 9. The water in the cold water tank 9 is cooled by the cooling tower 4 under the action of the water pump 5 and then returns to the cold water tank 9 to form a loop; Spray onto the coil.

The solar heat collector system 2 includes: a solar heat collector 10 , a water pump 11 , a valve 12 , and a solar water tank 13 . The connection relationship is: one end of the valve 12 is connected to the solar water tank 13, the other end is connected to the water pump 11 through a water pipe, the other end of the water pump 11 is connected to the solar heat collector 10, and the other end of the solar heat collector 10 is connected to the solar energy through a water pipe. The water tanks 13 are connected, and the water in the solar water tank 13 returns to the solar water tank 13 after being heated by the solar heat collector 10 under the action of the water pump 11 to form a loop.

The dehumidification heat exchange system 3 is further divided into a regeneration zone 33 and a treatment zone 32, and its equipment includes: valve 14, valve 15, valve 16, valve 17, valve 18, valve 19, valve 20, valve 21, two-way fan 22 , Dehumidification heat exchanger 23, air regulating valve 24, water pump 25, water pump 26, air regulating valve 27, dehumidification heat exchanger 28, two-way fan 29, air return port 30, air supply port 31. The treatment area 32 is divided into a water circulation subsystem and a wind treatment subsystem. The connection relationship of the wind treatment subsystem is: one end of the two-way fan 22 leads to the outdoor, the other end is connected with the dehumidification heat exchanger 23 through the air pipe, and the other end of the dehumidification heat exchanger 23 One end is connected with the air regulating valve 24, and the air regulating valve 24 makes the air pipe leading to the air supply port 31 in an open state. The connection relationship of the water circulation subsystem is: the dehumidification heat exchanger 23 is connected to the valve 17 through a water pipe, the other end of the valve 17 is connected to the cold water tank 9, the water outlet of the cold water tank 9 is connected to the valve 16, and the other end of the valve 16 The water pipe is connected to the water pump 25, and the water pump 25 is connected to the dehumidification heat exchanger 23. Under the action of the water pump 25, the water in the cold water tank 9 passes through the valve 16, the water pump 25, the dehumidification heat exchanger 23 and the valve 17 in sequence, and then returns to cold water. In box 9, a loop is formed. The regeneration zone 33 is divided into a water circulation subsystem and a regeneration wind subsystem. The connection relationship of the regeneration wind subsystem is as follows: one end of the two-way fan 29 leads to the outdoor, the other end is connected with the dehumidification heat exchanger 28 through an air pipe, and the other end of the dehumidification heat exchanger 28 One end is connected with the air regulating valve 27, and the air regulating valve 27 makes the air duct leading to the air return port 30 in an open state. The connection relationship of the water circulation subsystem is: the dehumidification heat exchanger 28 is connected to the valve 21 through a water pipe, the other end of the valve 21 is connected to the solar water tank 13, the water outlet of the solar water tank 13 is connected to the valve 20, and the other end of the valve 20 The water pipe is connected to the water pump 26, and the water pump 26 is connected to the dehumidification heat exchanger 28. The water in the solar water tank 13 passes through the valve 20, the water pump 26, the dehumidification heat exchanger 28 and the valve 21 in turn under the action of the water pump 26, and then returns to the solar energy. In the water tank 13, a circuit is formed.

In this embodiment, the functions of the original treatment area 32 and the regeneration area 33 can be switched through the following switching, that is, the original treatment area 32 becomes a regeneration area with a regeneration function, and the original regeneration area 33 becomes a treatment area with a function of regeneration. Dehumidification function. The switching mode is as follows: close valve 16, valve 17, open valve 14, valve 15, under the action of water pump 25, the hot water in solar water tank 13 returns to solar water tank 13 through dehumidification heat exchanger 23, forming a loop; Close valve 20 and valve 21, open valve 18 and valve 19, the water of cold water tank 9 returns in the cold water tank 9 through dehumidification heat exchanger 28 again under the effect of water pump 26, forms a loop. At the same time, the air regulating valve 24 makes the air duct leading to the air return port 30 in an open state, and the return air from the air return port 30 is discharged to the outside through the dehumidification heat exchanger 23 under the effect of the two-way fan 22; the air regulating valve 27 Make the air duct leading to the air supply port 31 in an open state, and the outdoor fresh air or the mixed air of fresh air and return air is sent to the air supply port 31 after passing through the dehumidification heat exchanger 28 under the action of the bidirectional fan 29 .

The two-way fan described above is a fan that can supply air in both positive and negative directions through switch switching, and each two-way fan can also be replaced by two one-way fans, but the installation positions of the two one-way fans are determined by the arrangement of the air ducts Condition.

The continuous dehumidification of the above system can be ensured by switching the functions of the regeneration zone and the treatment zone.

In winter, regenerative wind can be introduced into the room to heat and humidify the room. The processing wind is exhausted to the outside.

Example 4

The specific structure of the regenerative dehumidification heat exchanger involved in this embodiment is shown in Figure 5. The system is a heat pump dehumidification system, which includes: two-way fans 1, 8, dehumidification heat exchangers 2, 7, and air regulating valve 3 , 6, also includes peripheral equipment - compressor 9, four-way valve 10, expansion valve 11, air duct 12,13.

The two-way fan described above is a fan that can supply air in both positive and negative directions through switch switching, and each two-way fan can also be replaced by two one-way fans, but the installation positions of the two one-way fans are determined by the arrangement of the air ducts Condition.

The air regulating valve plays the role of switching the air duct.

As shown in Figure 5(a): the temperature of the refrigerant rises after being compressed by the compressor 9 and is heated by the dehumidification heat exchanger 7. At this time, the dehumidification heat exchanger 7 acts as a condenser in the heat pump system; the refrigerant expands After the valve 11, the temperature drops and passes through the dehumidification heat exchanger 2. At this time, the dehumidification heat exchanger 2 is used as an evaporator in the heat pump system, and finally the refrigerant returns to the compressor 9 to form a closed loop.

First adjust the air regulating valve 3 so that the air pipe leading to the air outlet 4 is in the open state and adjust the air regulating valve 6 so that the air pipe leading to the air return port 5 is in the open state. The dehumidification heat exchanger 2 is installed in the air duct 13, and the outdoor air or the mixed air of the exhaust air and the return air passes through the dehumidification heat exchanger 2 under the action of the bidirectional fan 1 to remove moisture, and then is sent to the air outlet 4; dehumidification The heat exchanger 7 is installed in the air duct 12, and the exhaust air passes through the dehumidification heat exchanger 7 under the action of the two-way fan 8 and absorbs the evaporated moisture, and then is discharged to the outside.

As shown in Figure 5(b): switch the flow direction of the refrigerant in the heat pump system, and at the same time adjust the air regulating valve 3 so that the air pipe leading to the air return port 5 is in an open state and adjust the air regulating valve 6 to make the air pipe leading to the air supply port 4 The air duct is in an open state. At this time, the dehumidification heat exchanger 7 is used as an evaporator in the heat pump system, and the dehumidification heat exchanger 2 is used as a condenser in the heat pump system. The exhaust air passes through the dehumidification heat exchanger 2 under the action of the two-way fan 1 and absorbs the evaporated water, and then is discharged to the outside; Heater 7 and is removed moisture, is sent to air outlet 4 then.

Continuous dehumidification can be realized by switching between the two modes (a) and (b).

In winter, the regenerative wind can be introduced into the room to heat and humidify the room, and the treated wind can be discharged outside.

Claims (3)

1. A regenerative dehumidification heat exchanger, including: cooling system, heating system, dehumidification heat exchange system, the three systems are connected by pipelines, the treatment area of the dehumidification heat exchange system is connected to the cooling system by pipelines, and the regeneration area is connected to Heating system connection, characterized in that: the dehumidification heat exchange system includes a treatment area and a regeneration area, wherein: The treatment area includes: a two-way fan, a dehumidification heat exchanger and an air regulating valve. The connection method is: one end of the two-way fan leads to the outside, the other end is connected to the dehumidification heat exchanger through an air pipe, and the other end of the dehumidification heat exchanger is connected to the air. The air regulating valve is connected, and the other end of the air regulating valve is connected to the air supply port, and the dehumidified treatment air or mixed air is sent into the room under the action of the two-way fan; The regeneration zone includes: a two-way fan, a dehumidification heat exchanger and an air regulating valve, and the connection method is: one end of the two-way fan leads to the outdoor, the other end is connected to the dehumidification heat exchanger through an air pipe, and the other end of the dehumidification heat exchanger is connected to the outside. The air regulating valve is connected, and the other end of the air regulating valve is connected to the air return port. The exhaust air absorbs the moisture evaporated from the dehumidification heat exchanger, and is discharged outdoors under the action of the two-way fan; The treatment area is divided into a water circulation subsystem and a wind treatment subsystem. The connection relationship of the wind treatment subsystem is: one end of the two-way fan leads to the outside, the other end is connected to the dehumidification heat exchanger through the air pipe, and the other end of the dehumidification heat exchanger is connected to the air. The air regulating valve is connected, and the air regulating valve makes the air pipe leading to the air outlet open. The connection relationship of the water circulation subsystem is: the dehumidification heat exchanger is connected to the valve through the water pipe, and the other end of the valve is connected to the cold water tank. The water outlet of the cold water tank is connected to the valve, and the other end of the valve is connected to the water pump through the water pipe, and the water pump is connected to the dehumidification heat exchanger. The water in the cold water tank passes through the valve, the water pump, the dehumidification heat exchanger and the valve in sequence Then return to the cold water tank to form a loop. The regeneration area is divided into a water circulation subsystem and a regeneration air subsystem. The connection relationship of the regeneration air subsystem is: one end of the two-way fan leads to the outdoor, and the other end is connected to the dehumidification heat exchanger through the air pipe , the other end of the dehumidification heat exchanger is connected to the air regulating valve, and the air regulating valve makes the air duct leading to the return air outlet open. The connection relationship of the water circulation subsystem is: the dehumidifying heat exchanger is connected to the valve through the water pipe, and the valve The other end of the solar water tank is connected to the solar water tank, the water outlet of the solar water tank is connected to the valve, the other end of the valve is connected to the water pump through the water pipe, the water pump is connected to the dehumidification heat exchanger, and the water in the solar water tank passes through the valve in turn under the action of the water pump , water pump, dehumidification heat exchanger and valves and then return to the solar water tank to form a loop. 2 . The regenerative dehumidification heat exchanger according to claim 1 , wherein the two-way fan is a fan capable of blowing air in both forward and reverse directions by switching between switches. 3 . 3. The regenerative dehumidification heat exchanger according to claim 1 or 2, characterized in that the two-way fan is replaced by two unidirectional fans.

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