Variable frequency heat pump four seasons type fresh air dehumidifier using condensing heat recovery technology

Abstract

The utility model discloses a kind of frequency conversion heat pump four seasons type all fresh air dehumidifier of application condensing heat recovery technology, it is related to dehumidification technical field, including at least one group of direct current variable frequency compressor system, direct current variable frequency compressor system includes the direct current variable frequency compressor for output refrigerant gas and the fin heat exchanger one and fin heat exchanger two for carrying out heat exchange, can carry out freezing dehumidification+condensing reheating method, can satisfy summer and spring and autumn season most time dehumidification demand, winter with heating fresh air with temperature rise dehumidification, all the year round can energy-saving operation, and be provided with plate economizer, can supercool refrigerant in system, can increase the refrigerating capacity when unit refrigeration and the heating capacity when heating, significantly improve the energy efficiency ratio of unit;Through the effect of electric valve control, can condensing heat recovery amount proportion control;To satisfy the demand of user.

Description

Technical Field

[0001] This utility model relates to the field of dehumidification technology, specifically to a variable frequency heat pump all-season fresh air dehumidifier that utilizes condensation heat recovery technology. Background Technology

[0002] Existing fresh air dehumidifiers use a system combining a refrigeration unit and a dehumidification rotor. Since both rotor regeneration and winter heating rely on electric heating, energy consumption is high, resulting in economic waste. Furthermore, the extensive use of electric heating poses significant safety hazards and generates substantial carbon emissions. With the continuous development and maturation of heat pump technology, pure heat pump type fresh air dehumidifiers have also been applied. However, heat pump type fresh air dehumidifiers inevitably encounter frost problems in winter, leading to unstable supply air temperatures, severely impacting operator comfort and work efficiency. Therefore, there is an urgent need for a variable frequency heat pump all-season fresh air dehumidifier using condensation heat recovery technology to solve these problems. Utility Model Content

[0003] The purpose of this invention is to provide a variable frequency heat pump all-season fresh air dehumidifier that applies condensation heat recovery technology, which can effectively solve the problems existing in the prior art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a variable frequency heat pump all-season fresh air dehumidifier using condensation heat recovery technology, comprising at least one set of DC variable frequency compressor system, wherein the DC variable frequency compressor system includes a DC variable frequency compressor, the outlet of the DC variable frequency compressor is connected to one end of a finned heat exchanger, and / or connected to one end of a condensation recovery unit after being controlled by a heat recovery electric valve, the other end of the finned heat exchanger and the other end of the condensation recovery unit are connected to a liquid receiver and a dryer filter in sequence through a one-way valve and then connected to a plate energy saver, one end of the plate energy saver is connected to one end of a finned heat exchanger after being controlled by a throttling valve, and the other end of the finned heat exchanger is connected back to the return port of the DC variable frequency compressor through a gas-liquid separator.

[0005] Preferably, the condenser recovery unit is located downwind of the finned heat exchanger.

[0006] Preferably, an auxiliary heat exchanger is provided between the finned heat exchanger and the condenser recovery unit. The auxiliary heat exchanger includes a tube bundle and an evaporation section and a condensation section located at both ends of the tube bundle. The evaporation section is installed in the channel on the air inlet side of the finned heat exchanger, and the condensation section is installed in the channel on the air inlet side of the condenser recovery unit.

[0007] Preferably, it includes multiple DC inverter compressor systems, which are connected in parallel, and each DC inverter compressor system can independently or share a set of condenser recovery units.

[0008] Preferably, the outlet end of the DC inverter compressor is connected to one end of the oil separator, and the other end of the oil separator is connected to a four-way valve. One end of the four-way valve is connected to the second finned heat exchanger, and another end is connected to the first finned heat exchanger and the heat recovery electric valve; the third end is connected to the gas-liquid separator.

[0009] Preferably, the output end of the dryer filter is directly connected to one end of the plate-type energy saver and / or connected in series with the solenoid valve and the second throttle valve, and then connected to one end of the plate-type energy saver. One end of the plate-type energy saver is connected to the compressor.

[0010] Preferably, one end of the plate-type energy saver is connected to the finned heat exchanger 2 via a one-way valve after being controlled by a throttle valve 1, or to the finned heat exchanger 1 via a one-way valve 3.

[0011] Beneficial effects: By using finned heat exchanger 1, finned heat exchanger 2, and condenser recovery unit in conjunction with a DC inverter compressor, the system employs a method of refrigeration dehumidification + condensation reheat, which can meet the dehumidification needs for most of the summer and spring / autumn seasons. In winter, heated fresh air is used for dehumidification, allowing for energy-efficient operation throughout the year. The system also includes a plate-type energy-saving device that subcools the refrigerant, increasing the unit's cooling capacity during cooling and heating capacity during heating, thus significantly improving the unit's energy efficiency ratio.

[0012] In addition, the electric valve control allows for proportional control of condensation heat recovery, enabling continuous adjustment of the machine's outlet air temperature between 12℃ and 50℃ to meet user needs. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] In the attached diagram: Figure 1 This is a structural schematic diagram of a variable frequency heat pump all-season fresh air dehumidifier that applies condensation heat recovery technology according to this utility model. Figure 2 This is a schematic diagram of the structure of the auxiliary heat exchanger in this utility model.

[0015] The diagram is labeled as follows: 1. DC inverter compressor; 2. Oil separator; 3. Four-way valve; 4. Finned heat exchanger I; 5. Check valve I; 6. Liquid receiver; 7. Shut-off valve I; 8. Dryer filter; 9. Plate type energy saver; 10. Throttling valve I; 11. Check valve II; 12. Finned heat exchanger II; 13. Gas-liquid separator; 14. Shut-off valve II; 15. Low pressure gauge; 16. High pressure gauge; 17. High and low pressure controller; 18. Solenoid valve; 19. Throttling valve II; 20. Check valve III; 21. Check valve IV; 22. Heat recovery electric valve; 23. Condensate recovery unit; 24. Check valve V; 25. Condenser fan; 26. Blower; 27. Tube bundle; 28. Evaporator section; 29. ​​Condenser section. Detailed Implementation

[0016] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0017] Example 1: A variable frequency heat pump all-season fresh air dehumidifier using condensation heat recovery technology includes one or more DC inverter compressor systems 1. Multiple DC inverter compressor systems 1 are connected in parallel, and each system can independently or jointly use a condensation recovery unit 23. The operating frequency and number of compressors (multiple compressor units) can be automatically adjusted according to the fresh air load, resulting in a very high seasonal energy efficiency ratio. This example uses one DC inverter compressor system 1 as an example. (Refer to...) Figure 1 As shown, the details are as follows: The outlet of the DC inverter compressor 1 is connected to one end of the oil separator 2. The other end of the oil separator 2 is connected to the four-way valve 3. One end of the four-way valve 3 is connected to one end of the finned heat exchanger 4. A condenser fan 25 is installed at the finned heat exchanger. The other end of the finned heat exchanger 4 is connected to the one-way valve 5. The output end of the one-way valve 5 is connected to one end of the liquid receiver 6. The other end of the liquid receiver 6 is connected to one end of the shut-off valve 7. The other end of the shut-off valve 7 is connected to one end of the dryer filter 8. The other end of the dryer filter 8 is connected to one end of the plate energy saver 9. The opposite end of the plate energy saver 9 is connected to one end of the throttle valve 10. The other end of the throttle valve 10 is connected to the one-way valve 11. The output end of the one-way valve 11 is connected to one end of the finned heat exchanger 12. The other end of the throttle valve 10 is connected to the one-way valve 20. The output end of the one-way valve 20 is connected to the other end of the finned heat exchanger 4. One end of the finned heat exchanger 12 is also connected to the one-way valve 21. The output end of the one-way valve 21 is connected to one end of the liquid receiver 6. The other end of the finned heat exchanger 12 is connected to one end of the four-way valve 3. One end of the four-way valve 3 is connected to one end of the gas-liquid separator 13. The other end of the gas-liquid separator 13 is connected back to the return port of the DC inverter compressor 1. A high pressure gauge 16 and a low pressure gauge 15 are installed in parallel on the DC inverter compressor 1 at the outlet and return port, respectively. A high and low pressure controller 17 is installed between the high pressure gauge 16 and the low pressure gauge 15. The other end of the gas-liquid separator 13 is also connected to the oil-gas separator after being controlled by the shut-off valve 2 14. Based on the above, the high-temperature and high-pressure refrigerant gas output from the outlet of the DC inverter compressor 1 is processed by the oil separator 2 and then enters the finned heat exchanger through the four-way valve 3 for heat exchange. After heat exchange, the high-pressure liquid enters the plate-type energy saver 9 through the one-way valve 5, the liquid receiver 6, the shut-off valve and the dryer filter 8. After being cooled by the plate-type energy saver 9, the low-temperature liquid is transported to the finned heat exchanger 12 through the throttle valve 10 and the one-way valve 11 for heat exchange again and then transported to one end of the four-way valve 3. From the other end of the four-way valve 3, it is transported to the gas-liquid separator 13 for gas-liquid separation and then returned to the return port of the DC inverter compressor 1.

[0018] In this embodiment, a throttling valve 19 and a solenoid valve 18 are also provided between the dryer filter 8 and the plate-type energy saver 9, for reference. Figure 1As shown, the other end of the dryer filter 8 is connected to one end of the solenoid valve 18, the other end of the solenoid valve 18 is connected to one end of the second throttle valve 19, the other end of the second throttle valve 19 is connected to one end of the plate-type energy saver 9, and the opposite end of the plate-type energy saver 9 is connected to the DC inverter compressor 1. Through the control of the second throttle valve 19 and the solenoid valve, the liquid output from the dryer filter 8 can be divided into two paths. One path directly enters the finned heat exchanger 12 through the first throttle valve 10 and the second check valve 11 for normal circulation. The other path is throttled through the second throttle valve 19 and evaporates, absorbing the heat of the surrounding high-pressure liquid refrigerant, evaporating into medium-pressure gas, and then being sucked into the intermediate gas inlet of the DC inverter compressor 1 to participate in the subsequent compression process. The second throttle valve 19 and the solenoid valve can be used to flexibly control the liquid.

[0019] In this embodiment, reference Figure 1 As shown, in the line connecting the four-way valve 3 to the finned heat exchanger, it is also connected to one end of the condenser 23 through the heat recovery electric valve 21. The other end of the condenser 23 is connected to the one-way valve 24. The output end of the one-way valve 24 is connected to one end of the liquid receiver 6. A blower 26 is installed downwind of the condenser 23. Based on the above, the high-temperature and high-pressure refrigerant gas output from the outlet of the DC inverter compressor 1 is processed by the oil separator 2 and then passed through the four-way valve 3. After being controlled by the heat recovery electric valve 21, it can be input to the condenser 23 for condensation heat recovery; proportional recovery can be performed by controlling the heat recovery electric valve 21.

[0020] Among them, reference Figure 1 As shown, finned heat exchanger 4, finned heat exchanger 12, and finned heat exchangers are arranged in parallel according to the airflow direction. Finned heat exchanger 4 is located outdoors, and finned heat exchanger 12 is located indoors. For example, after heat exchange in finned heat exchanger 4, the temperature is 50℃. After being processed by plate energy saver 9, the temperature can be reduced to 20℃. After being processed by finned heat exchanger 12, the temperature can be reduced to 12℃. Based on this, the machine outlet air temperature at condenser 23 can be continuously adjusted between 12℃ and 50℃ by controlling the heat recovery electric valve 21 to meet the user's needs.

[0021] Example 2, based on Example 1, with reference to Figure 2As shown, in this embodiment, an auxiliary heat exchanger is provided between the finned heat exchanger and the condenser. The auxiliary heat exchanger includes a tube bundle 27 and an evaporation section 28 and a condensation section 29 located at both ends of the tube bundle 27. The evaporation section 28 is installed in the channel on the air inlet side of the finned heat exchanger, and the condensation section 29 is installed in the channel on the air inlet side of the condenser. This achieves non-powered heat transfer, reduces reheat energy consumption, and improves the system response speed. The dehumidified low-temperature air (e.g., 12°C, 95%RH) flows through the evaporation section 28 of the auxiliary heat exchanger; the heat of the low-temperature air is absorbed by the evaporation section 28; the heat causes the liquid inside the evaporation section 28 to... The working fluid evaporates upon heating, transforming into steam. Due to evaporation, the steam pressure inside the evaporation section 28 increases, creating a slight pressure difference with the condensation section 29. Driven by this pressure difference, the steam working fluid flows at high speed towards the slightly lower pressure condensation section 29. In the condensation section, the steam working fluid encounters the even cooler pipe wall. The working fluid steam releases its latent heat of vaporization, and the latent heat released when it condenses back into a liquid state is rapidly transferred to the low-temperature, dry air flowing through the condensation section, causing its temperature to rise beforehand. The condensed liquid working fluid automatically flows back to the evaporation section 28 with the help of the capillary pump force generated by the liquid suction core inside the pipe wall. This cycle repeats automatically and continuously, transferring heat.

[0022] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. For those skilled in the art, after learning the contents of the present utility model, they can make several equivalent changes and substitutions without departing from the principle of the present utility model. These equivalent changes and substitutions should also be considered to fall within the protection scope of the present utility model.

Claims

1. A variable frequency heat pump all-season fresh air dehumidifier using condensation heat recovery technology, characterized in that, The system includes at least one DC inverter compressor system. The DC inverter compressor system includes a DC inverter compressor. The outlet of the DC inverter compressor is connected to one end of a finned heat exchanger and / or connected to one end of a condenser after being controlled by a heat recovery electric valve. The other end of the finned heat exchanger and the other end of the condenser are connected to a liquid receiver and a dryer filter in sequence through a one-way valve and then connected to a plate economizer. One end of the plate economizer is connected to one end of a finned heat exchanger after being controlled by a throttling valve. The other end of the finned heat exchanger is connected back to the return port of the DC inverter compressor through a gas-liquid separator.

2. The variable frequency heat pump four-season all-fresh air dehumidifier using condensing heat recovery technology according to claim 1, characterized in that: The condenser recovery unit is located downwind of the finned heat exchanger.

3. The variable frequency heat pump four-season all-fresh air dehumidifier using condensing heat recovery technology according to claim 1, characterized in that: An auxiliary heat exchanger is provided between the finned heat exchanger and the condenser recovery unit. The auxiliary heat exchanger includes a tube bundle and an evaporation section and a condensation section located at both ends of the tube bundle. The evaporation section is installed in the air inlet channel of the finned heat exchanger, and the condensation section is installed in the air inlet channel of the condenser recovery unit.

4. A variable frequency heat pump all-season fresh air dehumidifier using condensation heat recovery technology as described in claim 1 or 2, characterized in that: It includes multiple DC inverter compressor systems, which are connected in parallel, and each DC inverter compressor system can be independent or share a set of condenser recovery unit.

5. The variable frequency heat pump four-season all-fresh air dehumidifier using condensing heat recovery technology according to claim 1, characterized in that: The outlet of the DC inverter compressor is connected to one end of the oil separator, and the other end of the oil separator is connected to a four-way valve. One end of the four-way valve is connected to the second finned heat exchanger, and another end is connected to the first finned heat exchanger and the heat recovery electric valve; the third end is connected to the gas-liquid separator.

6. The variable frequency heat pump four-season all-fresh air dehumidifier applying condensing heat recovery technology according to claim 1, characterized in that: The output end of the dryer filter is directly connected to one end of the plate-type energy saver and / or connected in series with the solenoid valve and the second throttle valve, and then connected to one end of the plate-type energy saver. One end of the plate-type energy saver is connected to the compressor.

7. A variable frequency heat pump all-season fresh air dehumidifier using condensation heat recovery technology according to claim 6, characterized in that: One end of the plate-type energy saver is controlled by a throttle valve and then connected to the finned heat exchanger 2 via a check valve 2, or connected to the finned heat exchanger 1 via a check valve 3.

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