Heat pump type heat recovery solution humidification fresh air device

Abstract

The utility model discloses a heat pump type heat recovery type solution humidification fresh air device, including air sending machine, exhaust fan, first temperature regulating heat exchanger, second temperature regulating heat exchanger, solution humidification module, solution regeneration module, first regeneration heat exchanger and second regeneration heat exchanger, the air supply fan, first temperature regulating heat exchanger and solution humidification module are located on the air supply channel, the exhaust fan, second temperature regulating heat exchanger and solution regeneration module are located on the air exhaust channel, through setting two groups of regeneration heat exchanger, and solution circulation pipeline selects and corresponding regeneration heat exchanger series according to the working condition of refrigeration pipeline, no matter how is the circulation direction of refrigeration pipeline, solution circulation pipeline can utilize refrigerant waste heat to heat the humidification solution, has improved energy utilization efficiency, satisfies refrigeration dehumidification, heating dehumidification and a plurality of use demand.

Description

Technical Field

[0001] This utility model belongs to the field of fresh air equipment technology, specifically a heat pump type heat recovery solution dehumidification fresh air device. Background Technology

[0002] A solution-based dehumidifying fresh air system is a type of fresh air unit with a built-in solution dehumidifying module. It not only introduces fresh air and exhausts stale air like a traditional fresh air system, but also efficiently and independently controls the humidity and temperature of the incoming air, achieving independent processing of "temperature" and "humidity." When outdoor humidity is high, the humid fresh air first passes through the solution dehumidifier. A high-concentration cold solution (such as lithium bromide) is sprayed onto the packing material. As the fresh air passes through, because the water vapor partial pressure on the solution surface is much lower than that of the air, the moisture is strongly absorbed by the solution, making the air dry.

[0003] For example, Chinese utility model patent CN207094893U discloses a small residential solution-based dehumidification and fresh air handling unit with an external cold source. The unit mainly includes an auxiliary cold source, a refrigeration system, and a solution module. The auxiliary cold source uses the cooling capacity provided by external high-temperature chilled water to pre-cool and pre-dehumidify the fresh air. The evaporator of the refrigeration system uses the cooling capacity provided by the unit's own refrigeration system to further cool and dehumidify the fresh air. The heat exchange core of the solution module adopts a gas-liquid crossflow heat exchange form. The refrigeration system includes one or more compressors, an evaporator, a condenser, and one or more expansion valves. The outlet of the evaporator is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the expansion valve, and the outlet of the expansion valve is connected to the inlet of the evaporator, thus forming a heat pump refrigeration system loop.

[0004] However, the drawback of the above-mentioned fresh air system is that its operating conditions are relatively simple. It can usually only cool and dehumidify the fresh air, which is difficult to meet the needs in many situations. For example, in the cold and rainy winters in southern my country, the fresh air unit needs to have the function of heating and dehumidifying, while in the hot and dry summers in northwestern my country, the fresh air unit needs to have the function of cooling and humidifying. Summary of the Invention

[0005] This invention proposes a heat pump-type heat recovery solution-based dehumidification fresh air device, which aims to solve the problem that existing solution-based dehumidification fresh air units have a single operating condition, and are particularly unsuitable for simultaneously heating and humidifying outdoor fresh air.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A heat pump-type heat recovery solution dehumidification fresh air device includes a supply fan, an exhaust fan, a first temperature-regulating heat exchanger, a second temperature-regulating heat exchanger, a solution dehumidification module, a solution regeneration module, a first regeneration heat exchanger, and a second regeneration heat exchanger; the supply fan, the first temperature-regulating heat exchanger, and the solution dehumidification module are located on the supply air duct, and the exhaust fan, the second temperature-regulating heat exchanger, and the solution regeneration module are located on the exhaust air duct;

[0008] The first and second temperature-regulating heat exchangers are connected in series on the refrigeration pipeline, and the compressor is connected to the refrigeration pipeline through a four-way valve; the heat medium channel of the first regeneration heat exchanger is connected in series between the first and second temperature-regulating heat exchangers, the heat medium channel of the second regeneration heat exchanger is connected in series between the four-way valve and the second temperature-regulating heat exchanger, and a two-way expansion valve is connected in series between the first regeneration heat exchanger and the second temperature-regulating heat exchanger.

[0009] A solution circulation pipeline connects the solution humidification module and the solution regeneration module. When the first temperature-regulating heat exchanger is used as a condenser, the solution circulation pipeline is connected in series with the cold medium channel of the first regeneration heat exchanger. When the first temperature-regulating heat exchanger is used as an evaporator, the solution circulation pipeline is connected in series with the cold medium channel of the second regeneration heat exchanger.

[0010] Preferably, the solution circulation pipeline includes a three-way valve, a return pipe, and a circulation pump. The solution outlet of the solution humidification module is connected to the inlet end of the three-way valve. The two outlet ends of the three-way valve are respectively connected to the cold medium inlet of the first regeneration heat exchanger and the cold medium inlet of the second regeneration heat exchanger. The cold medium outlet of the first regeneration heat exchanger is connected to the solution inlet of the solution regeneration module through a first check valve. The cold medium outlet of the second regeneration heat exchanger is connected to the solution inlet of the solution regeneration module through a second check valve. The solution outlet of the solution regeneration module is connected to the solution inlet of the solution humidification module through the return pipe. A circulation pump is installed on the return pipe.

[0011] Preferably, the solution humidification module includes a solution tank containing a humidification solution, a wet film packing material above the solution tank, a spray head on top of the wet film packing material, a spray pipe connected between the spray head and the solution tank, and a spray pump on the spray pipe.

[0012] The solution regeneration module and the solution humidification module have the same structure.

[0013] Preferably, both the solution conditioning module and the solution regeneration module are equipped with auxiliary electric heaters in their solution tanks. A first solenoid valve is connected between the outlet of the circulation pump and the solution inlet of the solution conditioning module. A second solenoid valve is connected between the solution outlet of the solution conditioning module and the three-way valve. Both the first check valve and the second check valve are connected to the solution inlet of the solution regeneration module through a third solenoid valve.

[0014] Preferably, both the first and second temperature-regulating heat exchangers are finned tube heat exchangers, and both the first and second regeneration heat exchangers are shell-and-tube heat exchangers. Beneficial effects

[0015] Compared with the prior art, the present invention can achieve at least the following technical effects:

[0016] This invention features two sets of regenerative heat exchangers. The solution circulation pipeline is connected in series with the corresponding regenerative heat exchanger according to the operating conditions of the refrigeration pipeline. Regardless of the circulation direction of the refrigeration pipeline, the solution circulation pipeline can utilize the waste heat of the refrigerant to heat the humidification solution, thereby improving energy efficiency and meeting various usage needs such as refrigeration dehumidification and heating dehumidification.

[0017] This invention incorporates an auxiliary electric heater within the solution humidification module, enabling it to regulate air humidity even when the refrigeration pipeline is not in operation. It can also humidify the air while heating fresh air. Attached Figure Description

[0018] Figure 1 This is a diagram of the overall pipeline structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the solution humidification module of this utility model.

[0020] Figure 3 This is a schematic diagram of the fluid path in working condition 1 of this utility model embodiment.

[0021] Figure 4 This is a schematic diagram of the fluid path in working condition 2 of this utility model embodiment.

[0022] In the diagram: 1. Blower; 2. Solution humidification module; 201. Spray head; 202. Spray pipe; 203. Wet film packing; 204. Spray pump; 205. Solution tank; 206. Auxiliary electric heater; 3. Solution circulation pipeline; 4. First temperature-regulating heat exchanger; 5. Refrigeration pipeline; 6. Four-way valve; 7. Compressor; 8. Second temperature-regulating heat exchanger; 9. Two-way expansion valve; 10. First regeneration heat exchanger; 11. Three-way valve; 12. First check valve; 13. Second check valve; 14. Solution regeneration module; 15. Circulation pump; 16. Second regeneration heat exchanger; 17. Exhaust fan; 18. Return pipe; 19. First solenoid valve; 20. Second solenoid valve; 21. Third solenoid valve. Detailed Implementation

[0023] The present invention will be further explained below with reference to specific implementation examples.

[0024] Please see Figures 1-4This utility model proposes a heat pump type heat recovery solution dehumidification fresh air device, including a blower 1, an exhaust fan 17, a first temperature regulating heat exchanger 4, a second temperature regulating heat exchanger 8, a solution dehumidification module 2, a solution regeneration module 14, a first regeneration heat exchanger 10, and a second regeneration heat exchanger 16; the blower 1, the first temperature regulating heat exchanger 4, and the solution dehumidification module 2 are located on the air supply channel, and the exhaust fan 17, the second temperature regulating heat exchanger 8, and the solution regeneration module 14 are located on the exhaust channel;

[0025] The first temperature-regulating heat exchanger 4 and the second temperature-regulating heat exchanger 8 are connected in series on the refrigeration pipeline 5, and the compressor 7 is connected to the refrigeration pipeline 5 through the four-way valve 6; the heat medium channel of the first regeneration heat exchanger 10 is connected in series between the first temperature-regulating heat exchanger 4 and the second temperature-regulating heat exchanger 8, the heat medium channel of the second regeneration heat exchanger 16 is connected in series between the four-way valve 6 and the second temperature-regulating heat exchanger 8, and a two-way expansion valve 9 is connected in series between the first regeneration heat exchanger 10 and the second temperature-regulating heat exchanger 8.

[0026] A solution circulation pipeline 3 is connected between the solution humidification module 2 and the solution regeneration module 14. When the first temperature-regulating heat exchanger 4 is used as a condenser, the solution circulation pipeline 3 is connected in series with the cold medium channel of the first regeneration heat exchanger 10. When the first temperature-regulating heat exchanger 4 is used as an evaporator, the solution circulation pipeline 3 is connected in series with the cold medium channel of the second regeneration heat exchanger 16.

[0027] like Figure 1 As shown, the outdoor fresh air is conditioned by the first temperature-regulating heat exchanger 4 under the action of the blower, and then conditioned by the solution humidity-regulating module 2 before being sent into the room. The indoor air is discharged to the outside by the exhaust fan 17 through the regeneration module 14 and the second temperature-regulating heat exchanger 8.

[0028] The four-way valve 6 can change the flow direction of the refrigerant in the refrigeration pipeline 3, so as to heat or cool the outdoor fresh air through the first temperature-regulating heat exchanger 4 according to the outdoor fresh air temperature. When the first temperature-regulating heat exchanger 4 is used for refrigeration, the second regeneration heat exchanger 16 is connected to the solution circulation pipeline 3 to heat the humidification solution using the waste heat of the refrigerant; when the first temperature-regulating heat exchanger 4 is used for heating, the first regeneration heat exchanger 10 is connected to the solution circulation pipeline 3 to heat the humidification solution using the heat of the compressed refrigerant.

[0029] Specifically, the working process of this utility model under condition 1 is as follows: When the outdoor air temperature and humidity are high, the circulation direction of the refrigerant in the refrigeration pipeline 5 and the circulation direction of the humidifying solution in the solution circulation pipeline 3 are as follows: Figure 3As shown, the second temperature-regulating heat exchanger 8 acts as a condenser, and the first temperature-regulating heat exchanger 4 acts as an evaporator. The refrigerant vaporizes in the first temperature-regulating heat exchanger 4, absorbing heat to cool the outdoor fresh air. When the outdoor fresh air with high humidity flows through the solution humidity-regulating module 2, the water vapor partial pressure on the solution surface is much lower than that of the air, and the moisture is strongly absorbed by the solution. After absorbing moisture, the concentration of the solution in the solution humidity-regulating module 2 decreases. The low-concentration solution enters the second regeneration heat exchanger 16 through the solution circulation pipeline. The solution is regenerated and heated by the heat of the high-pressure and high-temperature refrigerant. The heated solution enters the solution regeneration module 14. At this time, the water vapor partial pressure on the solution surface is higher than that of the indoor exhaust air, and the moisture in the solution evaporates into the indoor exhaust air, increasing the solution concentration. The high-concentration solution that has completed the regeneration process flows into the solution humidity-regulating module 2 through the solution circulation pipeline 3.

[0030] The working process of this utility model under condition 2 is as follows: When the outdoor air temperature is low and the humidity is high, the circulation direction of the refrigerant in the refrigeration pipe 5 and the circulation direction of the humidifying solution in the solution circulation pipe 3 are as follows: Figure 4 As shown, the first temperature-regulating heat exchanger 4 serves as a condenser, and the second temperature-regulating heat exchanger 8 serves as an evaporator. The refrigerant condenses in the first temperature-regulating heat exchanger 4, releasing heat to heat the outdoor fresh air. The low-concentration solution enters the first regeneration heat exchanger 10 through the solution circulation pipeline, and the solution is regenerated and heated by the waste heat of the refrigerant. The dehumidification process of the solution humidity-regulating module 2 and the regeneration process of the solution regeneration module 14 in operating condition 2 are the same as those in operating condition 1.

[0031] In this embodiment, the solution circulation pipeline includes a three-way valve 11, a return pipe 18, and a circulation pump 15. The solution outlet of the solution humidification module 2 is connected to the inlet end of the three-way valve 11. The two outlet ends of the three-way valve 11 are respectively connected to the cold medium inlet of the first regeneration heat exchanger 10 and the cold medium inlet of the second regeneration heat exchanger 16. The cold medium outlet of the first regeneration heat exchanger 10 is connected to the solution inlet of the solution regeneration module 14 through a first one-way valve 12. The cold medium outlet of the second regeneration heat exchanger 16 is connected to the solution inlet of the solution regeneration module 14 through a second one-way valve 13. The solution outlet of the solution regeneration module 14 is connected to the solution inlet of the solution humidification module 2 through the return pipe 18. The circulation pump 15 is installed on the return pipe 18.

[0032] The three-way valve 11 is used to control the flow direction of the solution. Depending on the working conditions, the first regeneration heat exchanger 10 or the second regeneration heat exchanger 16 is connected to the solution circulation pipeline. Under the action of gravity pressure difference, the solution flows from the solution humidification module 2 to the solution regeneration module 14. The solution in the solution regeneration module 14 flows into the solution humidification module 2 under the action of the circulation pump 15, thereby completing the circulation of the solution.

[0033] In this embodiment, the solution humidification module 2 includes a solution tank 205, which stores a humidification solution. A wet film packing 203 is disposed above the solution tank 205. A spray head 201 is disposed on the top of the wet film packing 203. A spray pipe 202 is connected between the spray head 201 and the solution tank 205. A spray pump 204 is disposed on the spray pipe 202.

[0034] The solution regeneration module 14 has the same structure as the solution humidification module 2.

[0035] like Figure 2 As shown, the spray pump 204 pumps the solution in the solution tank 205 into the spray head 201 through the spray pipe 202 and sprays it onto the wet film packing 203, forming a liquid film on the surface of the wet film packing 203, which comes into full contact with the air, thereby completing the dehumidification or regeneration process.

[0036] In this embodiment, the solution pools 205 of both the solution conditioning module 2 and the solution regeneration module 14 are equipped with auxiliary electric heaters 206. A first solenoid valve 19 is connected between the outlet of the circulation pump 15 and the solution inlet of the solution conditioning module 2. A second solenoid valve 20 is connected between the solution outlet of the solution conditioning module 2 and the three-way valve 11. The first check valve 12 and the second check valve 13 are both connected to the solution inlet of the solution regeneration module 14 through a third solenoid valve 21.

[0037] When the refrigeration pipeline 5 is not in operation, the solution can be regenerated and heated by the auxiliary electric heater 206 installed in the solution tank 205. When the auxiliary electric heater 206 of the solution humidification module 2 is activated, the fresh air can be humidified. When the auxiliary electric heater 206 of the solution regeneration module 14 is activated and the auxiliary electric heater 206 of the solution humidification module 2 is turned off, the fresh air can be dehumidified. The first solenoid valve 19, the second solenoid valve 20, and the third solenoid valve 21 are used to control the flow direction of the solution circulation pipeline as needed.

[0038] In this embodiment, the first temperature-regulating heat exchanger 4 and the second temperature-regulating heat exchanger 8 are both finned tube heat exchangers, and the first regeneration heat exchanger 10 and the second regeneration heat exchanger 16 are both shell-and-tube heat exchangers.

[0039] In this embodiment, the first temperature-regulating heat exchanger 4 and the second temperature-regulating heat exchanger 8 are finned tube heat exchangers used to realize heat exchange between air and refrigerant. The first regeneration heat exchanger 10 and the second regeneration heat exchanger 16 are both shell-and-tube heat exchangers, with the refrigerant flowing through the tube side and the solution flowing through the shell side to complete the heat exchange between the refrigerant and the solution.

[0040] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0041] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat pump-type heat recovery solution-based dehumidification fresh air device, characterized in that, It includes a blower (1), an exhaust fan (17), a first temperature-regulating heat exchanger (4), a second temperature-regulating heat exchanger (8), a solution humidity control module (2), a solution regeneration module (14), a first regeneration heat exchanger (10), and a second regeneration heat exchanger (16); the blower (1), the first temperature-regulating heat exchanger (4), and the solution humidity control module (2) are located on the air supply channel, and the exhaust fan (17), the second temperature-regulating heat exchanger (8), and the solution regeneration module (14) are located on the exhaust channel; The first temperature-regulating heat exchanger (4) and the second temperature-regulating heat exchanger (8) are connected in series on the refrigeration pipeline (5), and the compressor (7) is connected to the refrigeration pipeline (5) through the four-way valve (6); the heat medium channel of the first regeneration heat exchanger (10) is connected in series between the first temperature-regulating heat exchanger (4) and the second temperature-regulating heat exchanger (8), the heat medium channel of the second regeneration heat exchanger (16) is connected in series between the four-way valve (6) and the second temperature-regulating heat exchanger (8), and a two-way expansion valve (9) is connected in series between the first regeneration heat exchanger (10) and the second temperature-regulating heat exchanger (8). A solution circulation pipeline (3) is connected between the solution humidification module (2) and the solution regeneration module (14). When the first temperature-regulating heat exchanger (4) is used as a condenser, the solution circulation pipeline (3) is connected in series with the cold medium channel of the first regeneration heat exchanger (10). When the first temperature-regulating heat exchanger (4) is used as an evaporator, the solution circulation pipeline (3) is connected in series with the cold medium channel of the second regeneration heat exchanger (16).

2. The heat pump type heat recovery solution dehumidification fresh air device according to claim 1, characterized in that, The solution circulation pipeline includes a three-way valve (11), a return pipe (18), and a circulation pump (15). The solution outlet of the solution humidification module (2) is connected to the inlet end of the three-way valve (11). The two outlet ends of the three-way valve (11) are respectively connected to the cold medium inlet of the first regeneration heat exchanger (10) and the cold medium inlet of the second regeneration heat exchanger (16). The cold medium outlet of the first regeneration heat exchanger (10) is connected to the solution inlet of the solution regeneration module (14) through the first one-way valve (12). The cold medium outlet of the second regeneration heat exchanger (16) is connected to the solution inlet of the solution regeneration module (14) through the second one-way valve (13). The solution outlet of the solution regeneration module (14) is connected to the solution inlet of the solution humidification module (2) through the return pipe (18). A circulation pump (15) is installed on the return pipe (18).

3. The heat pump type heat recovery solution dehumidification fresh air device according to claim 1, characterized in that, The solution humidification module (2) includes a solution tank (205) containing a humidification solution. A wet film packing (203) is provided above the solution tank (205). A spray head (201) is provided on the top of the wet film packing (203). A spray pipe (202) is connected between the spray head (201) and the solution tank (205). A spray pump (204) is provided on the spray pipe (202). The solution regeneration module (14) has the same structure as the solution humidification module (2).

4. A heat pump type heat recovery solution dehumidification fresh air device according to claim 2, characterized in that, Both the solution conditioning module (2) and the solution regeneration module (14) are equipped with auxiliary electric heaters (206) in their solution tanks. The outlet of the circulation pump (15) is connected to the solution inlet of the solution conditioning module (2) via a first solenoid valve (19). The solution outlet of the solution conditioning module (2) is connected to the three-way valve (11) via a second solenoid valve (20). The first check valve (12) and the second check valve (13) are both connected to the solution inlet of the solution regeneration module (14) via a third solenoid valve (21).

5. A heat pump type heat recovery solution dehumidification fresh air device according to claim 1, characterized in that, The first temperature-regulating heat exchanger (4) and the second temperature-regulating heat exchanger (8) are both finned tube heat exchangers, and the first regeneration heat exchanger (10) and the second regeneration heat exchanger (16) are both shell-and-tube heat exchangers.

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