Triple heat supply pump system

Abstract

The utility model discloses a triple-generation heat pump system which comprises a compressor and is characterized by comprising a first heat exchanger, a four-way valve, a second heat exchanger, a third heat exchanger and a refrigerant pipeline, and the second heat exchanger and the third heat exchanger are connected with the first heat exchanger and the compressor in series after being connected in parallel through the refrigerant pipeline. And the four-way valve is communicated with the compressor, the first heat exchanger, the second heat exchanger and the third heat exchanger. The water heating system has multiple operation modes, can meet the daily refrigeration and heating requirements, can also meet the domestic hot water requirement of a user, operates independently in each mode, adopts one-time heat exchange, and is lower in energy consumption and more energy-saving; cold water replenished water enters the water tank after being heated by the system, so that water temperature drop caused by the fact that cold water directly enters the water tank is effectively avoided; the air conditioner side pipeline and the hot water side pipeline are independent, the hot water side is similar to an open system, the scaling risk is reduced, pipeline arrangement is simple, and more installation space is saved.

Description

Technical Field

[0001] The utility model relates to the field of air conditioning, in particular to a triple heat pump system. Background Art

[0002] The existing trigeneration heat pump units in the European market use conventional cogeneration units, and use a three-way valve in the water circuit to switch between cooling, heating and hot water modes. The hot water side uses a jacketed water tank, which has low secondary heat exchange efficiency and high energy consumption. The jacketed side is a closed system, and the long-term production of high-temperature hot water will cause water quality to deteriorate and increase the risk of scaling. The cold water replenishment in this system is directly added to the hot water tank, which will cause uneven water temperature distribution in the hot water tank. When the hot water usage is large, the water temperature in the hot water tank will be low, and the user experience is poor. The piping layout is complex, and the water circuits on the air conditioning side and the hot water side are connected in parallel. Switching through the water side three-way valve will cause water cross-contamination. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a trigeneration heat pump system with simple piping layout, low energy consumption and multiple operating modes.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a triple heat pump system, including a compressor, a first heat exchanger, a four-way valve, a second heat exchanger, a third heat exchanger, and a refrigerant pipeline. The second heat exchanger and the third heat exchanger are connected in parallel through the refrigerant pipeline and then in series with the first heat exchanger and the compressor. The four-way valve connects the compressor, the first heat exchanger, the second heat exchanger and the third heat exchanger.

[0005] In the above technical solution, the first heat exchanger is a fin heat exchanger, the second heat exchanger is a plate heat exchanger, and the third heat exchanger is a shell and tube heat exchanger.

[0006] According to a preferred technical solution, a first solenoid valve and a second solenoid valve are respectively provided on the side of the second heat exchanger and the third heat exchanger connected to the compressor.

[0007] According to a preferred technical solution, a first liquid reservoir and a second liquid reservoir are respectively provided on the side of the second heat exchanger and the third heat exchanger connected to the first heat exchanger.

[0008] In the above technical solution, the liquid receiver adopts a double-tube liquid receiver to store high-pressure side refrigerant, balance the operation of the refrigeration system, buffer pressure fluctuations, improve the refrigeration effect and maintain equipment safety.

[0009] According to a further technical solution, a first one-way valve and a second throttle valve are connected between the second liquid reservoir and the first heat exchanger; a first throttle valve is connected between the first liquid reservoir and the first heat exchanger, and a second one-way valve is connected between the second throttle valve and the first throttle valve.

[0010] In the above technical solution, the throttle valve adopts an electronic expansion valve for throttling. The electronic expansion valve is arranged between the two heat exchangers, which can achieve precise flow control, better stability, and can quickly adjust the refrigerant flow as needed.

[0011] The one-way valve adopts a piston-type one-way valve, and the internal structure of the valve is equipped with a shock-absorbing spring, which makes the installation state of the valve body more flexible, can effectively ensure one-way flow and prevent backflow.

[0012] According to a preferred technical solution, a gas-liquid separator is provided on the refrigerant circuit of the compressor.

[0013] In the above technical solution, the gas-liquid separator is arranged on the low-pressure pipeline and is connected to the four-way valve and the compressor. The low-temperature and low-pressure gaseous refrigerant flows back to the compressor after passing through the four-way valve and the gas-liquid separator. The gas-liquid separator allows the low-temperature and low-pressure gaseous refrigerant containing a small amount of liquid to be purified in the gas phase, reducing the possibility of the compressor sucking in liquid refrigerant and causing liquid shock to damage the compressor.

[0014] According to a preferred technical solution, the third heat exchanger is covered with a hot water tank for storing domestic hot water.

[0015] The working principle of this utility model:

[0016] Conventional refrigeration: The first solenoid valve is closed, the second solenoid valve is closed, the four-way valve is closed, the first throttle valve is throttled, the second throttle valve is opened, the third heat exchanger is idle, and the refrigerant will flow through the pipeline to the second heat exchanger.

[0017] Conventional heating: the first solenoid valve is open, the second solenoid valve is closed, the four-way valve is open, the first throttle valve is throttled, the second throttle valve is open, the third heat exchanger is idle, and the refrigerant will flow through the pipeline to the first heat exchanger.

[0018] To make hot water separately: close the first solenoid valve, open the second solenoid valve, open the four-way valve, open the first throttle valve, throttle the second throttle valve, and leave the second heat exchanger idle. The refrigerant will flow through the pipeline to the first heat exchanger.

[0019] The advantages of the utility model are:

[0020] This utility model has multiple operating modes, which can meet daily cooling and heating needs, as well as users' domestic hot water needs. The air-conditioning side and hot water side systems are independent, with high heat exchange efficiency, energy saving, low hot water quality requirements, simple piping layout, and saved installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a structural diagram of embodiment mode 1;

[0024] Figure 2 This is a structural diagram of embodiment mode 2;

[0025] Figure 3 This is a structural diagram of embodiment mode three.

[0026] Among them: 1. Compressor; 2. Four-way valve; 3. First heat exchanger; 4. Second heat exchanger; 5. Third heat exchanger; 6. First solenoid valve; 7. Second solenoid valve; 8. First liquid reservoir; 9. Second liquid reservoir; 10. First one-way valve; 11. Second one-way valve; 12. Third one-way valve; 13. First throttle valve; 14. Second throttle valve; 15. Gas-liquid separator. DETAILED DESCRIPTION

[0027] Embodiment: A triple heat pump system includes a compressor 1, a first heat exchanger 3, a four-way valve 2, a second heat exchanger 4, a third heat exchanger 5, and a refrigerant pipeline. The second heat exchanger 4 and the third heat exchanger 5 are connected in parallel through the refrigerant pipeline and then in series with the first heat exchanger 3 and the compressor 1. The four-way valve 2 connects the compressor 1, the first heat exchanger 3, the second heat exchanger 4 and the third heat exchanger 5.

[0028] The first heat exchanger 3 is a fin heat exchanger, the second heat exchanger 4 is a plate heat exchanger, and the third heat exchanger 5 is a shell and tube heat exchanger.

[0029] A first solenoid valve 6 and a second solenoid valve 7 are respectively provided on the side of the second heat exchanger 4 and the third heat exchanger 5 connected to the compressor 1 .

[0030] A first liquid reservoir 8 and a second liquid reservoir 9 are respectively provided on the side of the second heat exchanger 4 and the third heat exchanger 5 connected to the first heat exchanger 3 .

[0031] The liquid receiver adopts a double-tube liquid receiver to store high-pressure side refrigerant, balance the operation of the refrigeration system, buffer pressure fluctuations, improve the refrigeration effect and maintain equipment safety.

[0032] A first one-way valve 10 and a second throttle valve 14 are connected between the second liquid reservoir 9 and the first heat exchanger 3. A first throttle valve 13 is connected between the first liquid reservoir 8 and the first heat exchanger 3, and a second one-way valve 11 is connected between the second throttle valve 14 and the first throttle valve 13. A third one-way valve 12 is connected between the second heat exchanger 4 and the four-way valve 2.

[0033] The throttle valve adopts electronic expansion valve throttling, which can quickly adjust the refrigerant flow as needed.

[0034] The one-way valve adopts a piston-type one-way valve, and the internal structure of the valve is equipped with a shock-absorbing spring, which makes the installation state of the valve body more flexible, can effectively ensure one-way flow and prevent backflow.

[0035] A gas-liquid separator 15 is provided in the refrigerant circuit of the compressor 1 .

[0036] The third heat exchanger 5 is covered with a hot water tank for storing domestic hot water.

[0037] like Figure 1 As shown, when there is a demand for air conditioning and cooling, use mode 1, conventional cooling.

[0038] Conventional refrigeration: the first solenoid valve 6 is closed, the second solenoid valve 7 is closed, the four-way valve 2 is closed, the first throttle valve 13 is throttled, the second throttle valve 14 is opened, the third heat exchanger 5 is idle, and the refrigerant will flow through the pipeline to the second heat exchanger 4.

[0039] The direction of refrigerant flow is: compressor 1-four-way valve 2-first heat exchanger 3-first throttle valve 13-first liquid reservoir 8-second heat exchanger 4-third one-way valve 12-four-way valve 2-gas-liquid separator 15-compressor 1.

[0040] At this time, the second heat exchanger 4 is used as an evaporator to meet the cooling demand; the first heat exchanger 3 is used as a condenser.

[0041] like Figure 2 As shown, when there is a demand for air conditioning and heating, use mode 2, conventional heating.

[0042] Conventional heating: the first solenoid valve 6 is opened, the second solenoid valve 7 is closed, the four-way valve 2 is opened, the first throttle valve 13 is throttled, the second throttle valve 14 is opened, the third heat exchanger 5 is idle, and the refrigerant will flow to the first heat exchanger 3 through the pipeline.

[0043] The direction of refrigerant flow is: compressor 1-four-way valve 2-first solenoid valve 6-second heat exchanger 4-first liquid reservoir 8-first throttle valve 13-first heat exchanger 3-four-way valve 2-gas-liquid separator 15-compressor 1.

[0044] At this time, the second heat exchanger 4 is used as a condenser to meet the heating demand; the first heat exchanger 3 is used as an evaporator.

[0045] like Figure 3 As shown, when there is a demand for domestic hot water, use mode three to produce hot water separately.

[0046] To make hot water separately: the first solenoid valve 6 is closed, the second solenoid valve 7 is opened, the four-way valve 2 is opened, the first throttle valve 13 is opened, the second throttle valve 14 is throttled, the second heat exchanger 4 is idle, and the refrigerant will flow to the first heat exchanger 3 through the pipeline.

[0047] The direction of refrigerant flow is: compressor 1-four-way valve 2-second solenoid valve 7-third heat exchanger 5-second liquid reservoir 9-first one-way valve 10-second throttle valve 14-first heat exchanger 3-four-way valve 2-gas-liquid separator 15-compressor 1.

[0048] At this time, the third heat exchanger 5 is used as a condenser to meet the hot water demand, and the first heat exchanger 3 is used as an evaporator. The third heat exchanger 5 is covered with a hot water tank, and the hot water produced is used for domestic hot water supply.

Claims

1. A trigeneration heat pump system, comprising a compressor, characterized in that: It includes a first heat exchanger, a four-way valve, a second heat exchanger, a third heat exchanger, and a refrigerant pipeline. The second heat exchanger and the third heat exchanger are connected in parallel through the refrigerant pipeline and then in series with the first heat exchanger and the compressor. The four-way valve connects the compressor, the first heat exchanger, the second heat exchanger and the third heat exchanger.

2. A trigeneration heat pump system according to claim 1, characterized in that: A first solenoid valve and a second solenoid valve are respectively provided on the side of the second heat exchanger and the third heat exchanger connected to the compressor.

3. The trigeneration heat pump system according to claim 1, characterized in that: The second heat exchanger and the third heat exchanger are respectively provided with a first liquid reservoir and a second liquid reservoir on one side connected to the first heat exchanger.

4. The trigeneration heat pump system according to claim 3, characterized in that: A first one-way valve and a second throttle valve are connected between the second liquid reservoir and the first heat exchanger; a first throttle valve is connected between the first liquid reservoir and the first heat exchanger, and a second one-way valve is connected between the second throttle valve and the first throttle valve.

5. The trigeneration heat pump system according to claim 1, characterized in that: A gas-liquid separator is provided on the refrigerant circuit of the compressor.

6. The trigeneration heat pump system according to claim 1, characterized in that: The third heat exchanger is covered with a hot water tank.

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