All-direct-current variable-frequency water source heat pump unit

Abstract

The utility model discloses full direct current frequency conversion water source heat pump unit, including compressor and temperature sensor, the one end of first pipe is fixedly connected with compressor, the utility model discloses, compare according to the water temperature of setting temperature and entering condenser high -efficient jar of compressor, the output frequency of automatic regulation compressor frequency converter, the speed of adjusting compressor, the speed reduces when low load, thereby input power reduces, reach the purpose of energy -conserving, the heat exchange pipe of condenser high -efficient jar and evaporator high -efficient jar inside high -efficient jar is internal thread outer fin copper pipe, and electronic expansion valve automatically adjusts the pulse step number of stepping motor according to the signal feedback of low pressure sensor and temperature sensor arranged in compressor return gas port, and the refrigerant flow of automatic accurate control entering evaporator is guaranteed system stable high -efficient operation, when needing to make cold water, four -way reversing valve switching channel, and the gas of compressor exhaust enters evaporator high -efficient jar by four -way reversing valve other side, and with the flow direction opposite of making hot water.

Description

Technical Field

[0001] This utility model relates to the field of heat pump unit technology, and in particular to a full DC inverter water source heat pump unit. Background Technology

[0002] Currently, industrial, commercial, and similar vapor compression cycle chiller units used in large-scale buildings all employ screw compressors. Screw compressors are large in size, requiring significant space for handling and installation. They can only achieve variable volumetric regulation (0%, 25%, 50%, 75%, 100%), which is not the most energy-efficient method. Screw compressors are noisy; they cannot use high-pressure, high-efficiency refrigerants; their large size and refrigerant charge result in high initial investment and maintenance costs; they cannot provide water temperatures exceeding 10°C; they have high installed power and starting current, putting significant strain on power lines; and they cannot be fully enclosed. Chiller units using scroll compressors have limited overall capacity due to the limited capacity of individual compressors, resulting in a narrow application range. Fixed-speed compressor control cannot adjust unit output according to actual load, leading to insufficient energy efficiency. Therefore, designing a fully DC inverter water source heat pump unit is essential. Utility Model Content

[0003] The purpose of this invention is to provide a fully DC inverter water source heat pump unit to solve the shortcomings of existing screw compressors, such as high investment cost, lack of energy efficiency, limited single-unit capacity, small overall capacity, and narrow application range.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a full DC inverter water source heat pump unit, including a compressor, a gas-liquid separator, a pressure sensor, a high-efficiency condenser tank, a filter, an electronic expansion valve, a high-efficiency evaporator tank, a low-pressure sensor, a flow switch, a high-pressure controller, and a temperature sensor. One end of the first pipe is fixedly connected to the compressor, and the other end of the first pipe is fixedly connected to the oil separator. The oil separator is fixedly connected to one end of the second pipe, and the other end of the second pipe is fixedly connected to a four-way reversing valve. The four-way reversing valve is fixedly connected to one end of the third, seventh, and eighth pipes, respectively. The compressor is fixedly connected to the housing.

[0005] As a further technical solution of this utility model, a pressure sensor and a high-pressure controller are provided on the first pipeline.

[0006] As a further technical solution of this utility model, the other end of the third pipe is fixedly connected to the high-efficiency tank of the condenser, one end of the fourth pipe is fixedly connected to the high-efficiency tank of the condenser, the other end of the fourth pipe is fixedly connected to the economizer, the high-efficiency tank of the condenser is fixedly connected to the ninth pipe, and a temperature sensor and a water flow switch are provided on the ninth pipe.

[0007] As a further technical solution of this utility model, a balance tank is fixedly connected to the fourth pipe, and a filter is provided on the fourth pipe.

[0008] As a further technical solution of this utility model, the economizer is fixedly connected to one end of the sixth pipe, the other end of the sixth pipe is fixedly connected to the high-efficiency tank of the evaporator, the high-efficiency tank of the evaporator is fixedly connected to the other end of the seventh pipe, and an electronic expansion valve is provided on the sixth pipe.

[0009] As a further technical solution of this utility model, the other end of the eighth pipe is fixedly connected to the gas-liquid separator, the gas-liquid separator is fixedly connected to one end of the fifth pipe, and the other end of the fifth pipe is fixedly connected to the compressor.

[0010] As a further technical solution of this utility model, a low-pressure sensor is provided on the fifth pipe.

[0011] The advantages of this all-DC inverter water source heat pump unit are as follows: Environmentally friendly refrigerant is compressed into high-temperature, high-pressure gas by a compressor. This gas flows through a first pipe to a four-way reversing valve, and then through a second pipe into the high-efficiency condenser tank. In the high-efficiency condenser tank, the high-temperature, high-pressure gas exchanges heat with the flowing water, raising the water temperature and providing a continuous supply of hot water. Simultaneously, the refrigerant gas condenses into a high-temperature, high-pressure liquid in the heat exchange tubes. This high-temperature, high-pressure liquid flows out of the high-efficiency condenser tank and enters a filter through a fourth pipe. After impurities are filtered out, the liquid passes through an electronic expansion valve on a sixth pipe, reducing its pressure and becoming a low-temperature, low-pressure gas-liquid two-phase mixture. This mixture then enters the high-efficiency evaporator tank, where it exchanges heat with the flowing water, absorbing heat from the water. The heat-absorbing gas-liquid mixture completely vaporizes back into gas and returns to the evaporator. The compressor starts the next cycle; the water temperature decreases after heat absorption; the compressor compares the set temperature with the water temperature entering the high-efficiency condenser tank, and automatically adjusts the output frequency of the compressor inverter to regulate the compressor speed. The speed decreases under low load, thereby reducing input power and achieving energy saving. The heat exchange tubes of the high-efficiency condenser tank and the high-efficiency evaporator tank are internally threaded external finned copper tubes. The electronic expansion valve automatically adjusts the stepper motor pulse steps based on the signals fed back by the low-pressure sensor and temperature sensor set at the compressor return port, and automatically and accurately controls the refrigerant flow into the evaporator to ensure stable and efficient system operation. When cold water needs to be produced, the four-way reversing valve switches the channel, and the gas discharged from the compressor enters the high-efficiency evaporator tank through the other side of the four-way reversing valve, which is the opposite of the flow direction when producing hot water. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the present invention.

[0015] In the diagram: 1. Compressor; 2. Gas-liquid separator; 3. Pressure sensor; 4. High-efficiency condenser tank; 5. Filter; 6. Electronic expansion valve; 7. High-efficiency evaporator tank; 8. Low-pressure sensor; 9. Flow switch; 10. High-pressure controller; 11. Temperature sensor; 12. Oil separator; 13. Economizer; 14. Balance tank; 15. Four-way reversing valve; 16. First pipe; 17. Second pipe; 18. Third pipe; 19. Fourth pipe; 20. Fifth pipe; 21. Sixth pipe; 22. Seventh pipe; 23. Eighth pipe; 24. Housing; 25. Ninth pipe. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] Please see the appendix Figure 1 -Appendix Figure 2This utility model provides an embodiment of a full DC inverter water source heat pump unit, including a compressor 1, a gas-liquid separator 2, a pressure sensor 3, a high-efficiency condenser tank 4, a filter 5, an electronic expansion valve 6, a high-efficiency evaporator tank 7, a low-pressure sensor 8, a flow switch 9, a high-pressure controller 10, and a temperature sensor 11. One end of a first pipe 16 is fixedly connected to the compressor 1, and the other end of the first pipe 16 is fixedly connected to an oil separator 12. The oil separator 12 is fixedly connected to one end of a second pipe 17, and the other end of the second pipe 17 is fixedly connected to a four-way reversing valve 15. The four-way reversing valve 15 is fixedly connected to one end of a third pipe 18, a seventh pipe 22, and an eighth pipe 23, respectively. The compressor 1 is fixedly connected to a housing 24. A pressure sensor 3 and a high-pressure controller 10 are installed on the first pipe 16. The high-pressure controller 10 prevents equipment damage or safety accidents caused by excessive pressure. The other end of the third pipe 18 is fixedly connected to the high-efficiency condenser tank 4, and one end of a fourth pipe 19 is fixedly connected to the high-efficiency condenser tank 4. The other end of pipe 19 is fixedly connected to economizer 13. The high-efficiency condenser tank 4 is fixedly connected to the ninth pipe 25. A temperature sensor 11 and a water flow switch 9 are installed on the ninth pipe 25. Economizer 13 uses some of the already cooled refrigerant to further cool the main refrigerant. A balance tank 14 is fixedly connected to the fourth pipe 19. A filter 5 is installed on the fourth pipe 19. The balance tank 14 is used to temporarily store excess condensate. One end of the sixth pipe 21 is fixedly connected to economizer 13. The other end of the sixth pipe 21 is fixedly connected to the high-efficiency evaporator tank 7. The high-efficiency evaporator tank 7 is fixedly connected to the other end of the seventh pipe 22. An electronic expansion valve 6 is installed on the sixth pipe 21. The electronic expansion valve 6 is used to throttle and reduce pressure. The other end of the eighth pipe 23 is fixedly connected to gas-liquid separator 2. Gas-liquid separator 2 is fixedly connected to one end of the fifth pipe 20. The other end of the fifth pipe 20 is fixedly connected to compressor 1. Gas-liquid separator 2 separates gas and liquid. A low-pressure sensor 8 is installed on the fifth pipe 20. The low-pressure sensor 8 is used to monitor the pressure of the gas flowing through it.

[0018] Specifically, in use, the environmentally friendly refrigerant is first compressed into a high-temperature, high-pressure gas by compressor 1. This gas flows through the first pipe 16 to the four-way reversing valve 15, and then through the second pipe 17 into the high-efficiency condenser tank 4. Inside the high-efficiency condenser tank 4, the high-temperature, high-pressure gas exchanges heat with the flowing water, raising the water temperature and providing a continuous supply of hot water. Simultaneously, the refrigerant gas condenses into a high-temperature, high-pressure liquid in the heat exchange tubes. This high-temperature, high-pressure liquid flows out of the high-efficiency condenser tank 4 and enters the filter 5 through the fourth pipe 19. After impurities are filtered out by the filter 5, the liquid is throttled by the electronic expansion valve 6 on the sixth pipe 21, reducing its pressure and becoming a low-temperature, low-pressure gas-liquid two-phase mixture. This mixture then enters the high-efficiency evaporator tank 7, where it exchanges heat with the flowing water, absorbing heat from the water. The heat-absorbing gas-liquid mixture completely vaporizes into gas and returns to compressor 1, then continues to flow... One cycle; the water temperature decreases after heat absorption; compressor 1 compares the set temperature with the water temperature entering the high-efficiency condenser tank 4, and automatically adjusts the output frequency of compressor 1's inverter to regulate the speed of compressor 1. The speed decreases under low load, thereby reducing input power and achieving energy saving. The heat exchange tubes of the high-efficiency condenser tank 4 and the high-efficiency evaporator tank 7 are internally threaded external finned copper tubes. The electronic expansion valve 6 automatically adjusts the stepper motor pulse step number based on the signals fed back by the low-pressure sensor 8 and temperature sensor 11 set at the return gas port of compressor 1, and automatically and accurately controls the refrigerant flow into the evaporator to ensure stable and efficient system operation. When cold water needs to be produced, the four-way reversing valve 15 switches the channel, and the gas discharged from compressor 1 enters the high-efficiency evaporator tank 7 through the other side of the four-way reversing valve 15, which is the opposite of the flow direction when producing hot water.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A full DC inverter water source heat pump unit, comprising a compressor (1), a gas-liquid separator (2), a pressure sensor (3), a high-efficiency condenser tank (4), a filter (5), an electronic expansion valve (6), a high-efficiency evaporator tank (7), a low-pressure sensor (8), a flow switch (9), a high-pressure controller (10), and a temperature sensor (11), characterized in that: The compressor (1) is fixedly connected to one end of the first pipe (16), the other end of the first pipe (16) is fixedly connected to the oil separator (12), the oil separator (12) is fixedly connected to one end of the second pipe (17), the other end of the second pipe (17) is fixedly connected to the four-way reversing valve (15), the four-way reversing valve (15) is fixedly connected to one end of the third pipe (18), the seventh pipe (22) and the eighth pipe (23) respectively, and the compressor (1) is fixedly connected to the housing (24).

2. The all-DC inverter water source heat pump unit according to claim 1, characterized in that: A pressure sensor (3) and a high-pressure controller (10) are installed on the first pipe (16).

3. The all-DC inverter water source heat pump unit according to claim 1, characterized in that: The other end of the third pipe (18) is fixedly connected to the high-efficiency condenser tank (4). One end of the fourth pipe (19) is fixedly connected to the high-efficiency condenser tank (4). The other end of the fourth pipe (19) is fixedly connected to the economizer (13). The high-efficiency condenser tank (4) is fixedly connected to the ninth pipe (25). A temperature sensor (11) and a water flow switch (9) are installed on the ninth pipe (25).

4. The all-DC inverter water source heat pump unit according to claim 3, characterized in that: A balance tank (14) is fixedly connected to the fourth pipe (19), and a filter (5) is installed on the fourth pipe (19).

5. The all-DC inverter water source heat pump unit according to claim 3, characterized in that: The economizer (13) is fixedly connected to one end of the sixth pipe (21), and the other end of the sixth pipe (21) is fixedly connected to the high-efficiency evaporator tank (7). The high-efficiency evaporator tank (7) is fixedly connected to the other end of the seventh pipe (22), and an electronic expansion valve (6) is installed on the sixth pipe (21).

6. The all-DC inverter water source heat pump unit according to claim 1, characterized in that: The other end of the eighth pipe (23) is fixedly connected to the gas-liquid separator (2), and the gas-liquid separator (2) is fixedly connected to one end of the fifth pipe (20), and the other end of the fifth pipe (20) is fixedly connected to the compressor (1).

7. The all-DC inverter water source heat pump unit according to claim 6, characterized in that: A low-pressure sensor (8) is installed on the fifth pipe (20).

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