A multi-mode energy regulation device for air source heat pumps

Abstract

This utility model discloses a multi-mode energy regulation device for air source heat pumps, relating to the field of heat pump energy regulation technology. It includes a main compressor, an evaporator, a condenser, an expansion valve, and a three-way valve. The outlet end of the main compressor is connected to the inlet end of the three-way valve, and the first outlet of the three-way valve is connected to the inlet end of the condenser. This utility model connects a main variable frequency compressor and an auxiliary fixed frequency compressor in parallel to form a main compressor. Combined with the dual-outlet diversion design of the three-way valve, it achieves dynamic refrigerant distribution. Through the fluid acceleration structure of the Venturi tube, combined with a plate-fin auxiliary heat exchanger, it significantly improves dehumidification efficiency. Furthermore, the integrated control module, incorporating temperature, humidity, and pressure sensors, can monitor evaporator inlet parameters in real time, effectively reducing system pressure fluctuations, improving the overall energy efficiency ratio, and achieving seamless switching between cooling, dehumidification, and energy storage modes. It maintains a high energy efficiency ratio even under low-temperature conditions, making it more energy-efficient than traditional heat pumps.

Description

Technical Field

[0001] This utility model relates to the field of heat pump energy regulation technology, and in particular to a multi-mode energy regulation device for air source heat pumps. Background Technology

[0002] An air source heat pump is a heat energy transfer device that absorbs low-grade heat energy from the air and converts it into high-grade heat energy through the work of a compressor. In an air source heat pump system, multi-mode energy regulation refers to the automatic or manual adjustment of the heat pump's operating mode, temperature setting, fan speed, and working time through an intelligent control system based on the indoor and outdoor environment and user needs, so as to achieve precise control of indoor temperature and efficient use of energy.

[0003] Based on existing technologies, traditional air source heat pumps suffer from several technical challenges, including poor adaptability to single control mode, significant energy efficiency degradation under partial load, energy coupling conflict between dehumidification and heating, and a sharp drop in performance under low-temperature conditions. Therefore, this invention proposes a multi-mode energy regulation device for air source heat pumps to address these problems. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this invention is to propose a multi-mode energy regulation device for air source heat pumps, which solves the problems of poor adaptability of the single control mode, significant energy efficiency degradation under partial load, energy coupling conflict between dehumidification and heating, and sudden performance drop under low temperature conditions that exist in traditional air source heat pumps.

[0005] To achieve the purpose of this utility model, the present utility model is implemented through the following technical solution: a multi-mode energy regulation device for an air source heat pump, comprising a main compressor, an evaporator, a condenser, an expansion valve, and a three-way valve. The inlet end of the main compressor is connected to the outlet end of the evaporator, the outlet end of the main compressor is connected to the inlet end of the three-way valve, the first outlet of the three-way valve is connected to the inlet end of the condenser, a phase change energy storage component is connected to the main outlet of the condenser, a branch outlet of the condenser is connected to the inlet end of the expansion valve, the outlet end of the expansion valve is connected to the inlet end of the evaporator, a temperature sensor and a humidity sensor are installed at the inlet of the evaporator, an auxiliary heat exchanger is connected between the evaporator and the second outlet of the three-way valve, and a pressure sensor is installed at the outlet end of the condenser.

[0006] A further improvement is that a Venturi tube is connected between the inlet end of the evaporator and the outlet end of the auxiliary heat exchanger, and a bellows is connected between the inlet end of the auxiliary heat exchanger and the second outlet of the three-way valve.

[0007] Further improvements include: the ratio of the throat diameter to the inlet diameter of the Venturi tube is 1:3; the auxiliary heat exchanger adopts a plate-fin structure and is covered with a hydrophobic coating; and both the inlet and outlet of the auxiliary heat exchanger use quick-release connectors.

[0008] A further improvement is that the opening degree of the expansion valve is controlled by a stepper motor, and the valve core of the expansion valve meshes with the output shaft of the stepper motor through a transmission gear set.

[0009] A further improvement is that it also includes a control module, which integrates a temperature and humidity signal processing unit connected to a temperature sensor and a humidity sensor, as well as a pressure signal conversion unit connected to a pressure sensor.

[0010] A further improvement is that the phase change energy storage component includes a double-layer stainless steel shell and a polyurethane foam insulation layer filled in the interlayer of the double-layer stainless steel shell, and the phase change energy storage component is encapsulated with a paraffin-based composite phase change material.

[0011] A further improvement is that the main compressor is composed of a main variable frequency compressor and an auxiliary fixed frequency compressor connected in parallel, and check valves are installed on the outlet pipelines of both the main variable frequency compressor and the auxiliary fixed frequency compressor.

[0012] The beneficial effects of this utility model are as follows: This utility model includes a main compressor, an evaporator, a condenser, an expansion valve, and a three-way valve. By connecting the main variable frequency compressor and the auxiliary fixed frequency compressor in parallel to form the main compressor, and with the dual-outlet diversion design of the three-way valve, dynamic distribution of refrigerant is achieved. Through the fluid acceleration structure of the Venturi tube, combined with the plate-fin auxiliary heat exchanger, the dehumidification efficiency is significantly improved. Moreover, the control module integrating temperature sensor, humidity sensor, and pressure sensor can monitor the evaporator inlet parameters in real time, which can effectively reduce system pressure fluctuations, improve the overall energy efficiency ratio, and achieve seamless switching between the three modes of refrigeration, dehumidification, and energy storage. It can still maintain a high energy efficiency ratio under low temperature conditions, making it more energy-efficient than traditional heat pumps. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the multi-mode energy regulation device for air source heat pumps of this utility model.

[0014] The components include: 1. Main compressor; 2. Evaporator; 3. Condenser; 4. Expansion valve; 5. Three-way valve; 6. Phase change energy storage component; 7. Auxiliary heat exchanger; 8. Venturi tube; 9. Bellows; 10. Control module; 101. Main variable frequency compressor; 102. Auxiliary fixed frequency compressor; 103. Check valve; 201. Temperature sensor; 202. Humidity sensor; 301. Pressure sensor; 401. Stepper motor; 501. First outlet; 502. Second outlet; 601. Double-layer stainless steel shell; 602. Polyurethane foam insulation layer; 1001. Temperature and humidity signal processing unit; 1002. Pressure signal conversion unit. Detailed Implementation

[0015] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0016] according to Figure 1 As shown, this embodiment provides a multi-mode energy regulation device for an air source heat pump. The device comprises a compressor 1, an evaporator 2, a condenser 3, an expansion valve 4, a three-way valve 5, a phase change energy storage component 6, and an auxiliary heat exchanger 7. The inlet end of the main compressor 1 is connected to the outlet end of the evaporator 2, allowing the low-temperature refrigerant discharged from the evaporator 2 to enter the main compressor 1. The outlet end of the main compressor 1 is connected to the inlet end of the three-way valve 5, facilitating the delivery of pressurized refrigerant to the three-way valve 5. The three-way valve 5 has a first outlet 501 and a second outlet 502. The first outlet 501 is connected to the inlet end of the condenser 3 via a high-pressure copper pipe, facilitating the delivery of pressurized refrigerant to the condenser 3 through the three-way valve 5. The condenser 3... The condenser 3 has two outlets, including a main outlet and a branch outlet. The main outlet of the condenser 3 is connected to the phase change energy storage component 6 via a flange connection to facilitate heat release to the phase change energy storage component 6. The branch outlet of the condenser 3 is connected to the inlet end of the expansion valve 4 via a copper pipe. The expansion valve 4 can act as a throttling device. The outlet end of the expansion valve 4 is connected to the inlet end of the evaporator 2 via a capillary tube. A temperature sensor 201 for monitoring ambient temperature and a humidity sensor 202 for monitoring ambient humidity are installed at the inlet of the evaporator 2. An auxiliary heat exchanger 7 is also connected between the inlet end of the evaporator 2 and the second outlet 502 of the three-way valve 5. A pressure sensor 301 for monitoring pressure is installed at the outlet end of the condenser 3.

[0017] In this embodiment, the inlet end of the evaporator 2 is connected to the outlet end of the auxiliary heat exchanger 7 via a venturi tube 8. The inlet end of the auxiliary heat exchanger 7 is connected to the second outlet 502 of the three-way valve 5 via a bellows 9. The ratio of the throat diameter to the inlet diameter of the venturi tube 8 is 1:3. A filter screen made of 316 stainless steel with a mesh density of 200 meshes is installed in the throat. The auxiliary heat exchanger 7 adopts a plate-fin structure with aluminum fins evenly distributed at a spacing of 2.5 mm. The surface of the aluminum fins is covered with a hydrophobic coating with a coating thickness of 50-80 μm. The inlet and outlet of the auxiliary heat exchanger 7 adopt DN15 quick-release connectors for easy and quick disassembly and assembly.

[0018] In this embodiment, the opening degree of the expansion valve 4 is controlled by the stepper motor 401. The valve core of the expansion valve 4 meshes with the output shaft of the stepper motor 401 through a transmission gear set. The transmission gear set includes a helical gear with a module of 0.5 and a reduction ratio of 10:1.

[0019] The air source heat pump multi-mode energy regulation device also includes a control module 10, which integrates a temperature and humidity signal processing unit 1001 and a pressure signal conversion unit 1002. The temperature and humidity signal processing unit 1001 is connected to the temperature sensor 201 and the humidity sensor 202 through a shielded wire, and the pressure signal conversion unit 1002 is directly connected to the pressure sensor 301 through a hard copper wire.

[0020] The phase change energy storage module 6 consists of a double-layer stainless steel shell 601 and a polyurethane foam insulation layer 602. The double-layer stainless steel shell 601 is made of 304 stainless steel. The polyurethane foam insulation layer 602 is filled in the interlayer of the double-layer stainless steel shell 601. The insulation layer is 30mm thick. The phase change energy storage module 6 is encapsulated with a paraffin-based composite phase change material with a phase change temperature of 45℃±2℃.

[0021] The main compressor 1 is composed of a main variable frequency compressor 101 and an auxiliary fixed frequency compressor 102 connected in parallel. Check valves 103 are installed on the outlet pipelines of both the main variable frequency compressor 101 and the auxiliary fixed frequency compressor 102. The opening pressure of the check valves 103 is 0.15MPa. The suction ports of the main variable frequency compressor 101 and the auxiliary fixed frequency compressor 102 are connected by a Y-type copper pipe.

[0022] The basic cycle flow of the air source heat pump multi-mode energy regulation device in this embodiment is as follows:

[0023] 1. Start

[0024] After the main compressor 1 starts, high-temperature and high-pressure gaseous refrigerant is output from the outlet to the inlet of the three-way valve 5;

[0025] The main variable frequency compressor 101 and the auxiliary fixed frequency compressor 102 operate in parallel according to load demand, and the check valve 103 prevents backflow.

[0026] 2. Refrigerant diversion control

[0027] Mode 1 (Conventional Refrigeration): Three-way valve 5 opens the first outlet 501 → refrigerant enters condenser 3 and releases heat to liquefy;

[0028] Mode 2 (Rapid Dehumidification): Three-way valve 5 opens the second outlet 502 → refrigerant enters the auxiliary heat exchanger 7 through the bellows 9;

[0029] 3. Condensation process

[0030] The refrigerant entering condenser 3 is in the main circuit:

[0031] Some of the liquid refrigerant enters the phase change energy storage component 6, where the phase change material absorbs and stores heat (phase change temperature 45℃±2℃), and the remainder flows to the expansion valve 4 through a branch.

[0032] 4. Expansion throttling

[0033] Stepper motor 401 precisely adjusts the opening of expansion valve 4 through transmission gear set. After the refrigerant is throttled through capillary tube, the pressure and temperature drop sharply, forming a low-temperature and low-pressure two-phase flow.

[0034] 5. Evaporation absorbs heat

[0035] The refrigerant absorbs heat from the air and vaporizes in evaporator 2.

[0036] Temperature sensor 201 and humidity sensor 202 monitor the inlet conditions in real time.

[0037] The multi-mode operation characteristics of the air source heat pump multi-mode energy regulation device in this embodiment are as follows:

[0038] Mode 1: High-efficiency energy storage operation

[0039] Path: Main compressor 1 → Three-way valve 5 → Condenser 3 → Phase change energy storage component 6;

[0040] Features: The 602 polyurethane foam insulation layer reduces the heat loss of the phase change material to <5% / 24h, and automatically triggers the energy storage mode when the condensation temperature is >47℃;

[0041] Mode 2: Rapid Dehumidification Operation

[0042] Path: Main compressor 1 → Three-way valve 5 → Auxiliary heat exchanger 7 → Venturi tube 8 → Evaporator 2

[0043] Features: The throat diameter ratio of the Venturi tube 8 is 1:3, which increases the flow rate by 40%; the hydrophobic coating on the surface of the plate-fin auxiliary heat exchanger 7 (contact angle ≥120°) accelerates the discharge of condensate.

[0044] Mode 3: Two-stage compression operation

[0045] Triggering condition: Pressure sensor 301 detects condensing pressure > 2.8 MPa

[0046] Action: The auxiliary fixed-frequency compressor 102 starts, the total displacement increases by 60%, and the control module 10 synchronously adjusts the opening of the expansion valve 4 to 80% of the maximum stroke.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-mode energy regulation device for an air-source heat pump, comprising a main compressor (1), an evaporator (2), a condenser (3), an expansion valve (4), and a three-way valve (5), characterized in that: The inlet end of the main compressor (1) is connected to the outlet end of the evaporator (2), the outlet end of the main compressor (1) is connected to the inlet end of the three-way valve (5), the first outlet (501) of the three-way valve (5) is connected to the inlet end of the condenser (3), the main outlet of the condenser (3) is connected to a phase change energy storage component (6), the branch outlet of the condenser (3) is connected to the inlet end of the expansion valve (4), the outlet end of the expansion valve (4) is connected to the inlet end of the evaporator (2), a temperature sensor (201) and a humidity sensor (202) are installed at the inlet of the evaporator (2), an auxiliary heat exchanger (7) is connected between the evaporator (2) and the second outlet (502) of the three-way valve (5), and a pressure sensor (301) is installed at the outlet end of the condenser (3).

2. The air source heat pump multi-mode energy regulation device according to claim 1, characterized in that: A venturi tube (8) is connected between the inlet end of the evaporator (2) and the outlet end of the auxiliary heat exchanger (7), and a bellows tube (9) is connected between the inlet end of the auxiliary heat exchanger (7) and the second outlet (502) of the three-way valve (5).

3. The air source heat pump multi-mode energy regulation device according to claim 2, characterized in that: The ratio of the throat diameter to the inlet diameter of the Venturi tube (8) is 1:

3. The auxiliary heat exchanger (7) adopts a plate-fin structure and is covered with a hydrophobic coating. The inlet and outlet of the auxiliary heat exchanger (7) both adopt quick-release joints.

4. The air source heat pump multi-mode energy regulation device according to claim 1, characterized in that: The expansion valve (4) is controlled by a stepper motor (401) to control its opening degree. The valve core of the expansion valve (4) is engaged with the output shaft of the stepper motor (401) through a transmission gear set.

5. The air source heat pump multi-mode energy regulation device according to claim 4, characterized in that: It also includes a control module (10), which integrates a temperature and humidity signal processing unit (1001) connected to a temperature sensor (201) and a humidity sensor (202) and a pressure signal conversion unit (1002) connected to a pressure sensor (301).

6. The air source heat pump multi-mode energy regulation device according to claim 1, characterized in that: The phase change energy storage component (6) includes a double-layer stainless steel shell (601) and a polyurethane foam insulation layer (602) filled in the interlayer of the double-layer stainless steel shell (601). The phase change energy storage component (6) is encapsulated with a paraffin-based composite phase change material.

7. The air source heat pump multi-mode energy regulation device according to claim 1, characterized in that: The main compressor (1) is composed of a main variable frequency compressor (101) and an auxiliary fixed frequency compressor (102) connected in parallel. The outlet pipelines of the main variable frequency compressor (101) and the auxiliary fixed frequency compressor (102) are both equipped with check valves (103).

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