Cooling and heating heat pump

Abstract

The utility model discloses a cooling and heating heat pump which comprises a heat pump main machine and a PV / T photovoltaic panel body and further comprises an air source mechanism, a heat pump main machine, a heat pump main machine and a heat pump main machine, the photovoltaic heat absorption mechanism is arranged on the PV / T photovoltaic panel body; a compressor and a fin evaporator are arranged in the heat pump main machine, a copper pipe is arranged on the PV / T photovoltaic panel body, a PV / T photovoltaic panel stop valve is arranged on the outer wall of one side of the heat pump main machine, the PV / T photovoltaic panel body is connected with the heat pump main machine through the PV / T photovoltaic panel stop valve, and a one-way valve is arranged at the outlet end of the PV / T photovoltaic panel body. The cold and warm heat pump disclosed by the utility model has the technical effects that double heat sources of the air source and the PV / T photovoltaic heat absorbing plate are provided, the pressure of return air of the compressor is increased and cannot enter the PV / T photovoltaic plate body when the heat pump host operates for defrosting through the one-way valve, so that the PV / T photovoltaic plate body cannot be damaged, the double heat source sides can circularly heat, and the use effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling and heating heat pumps, in particular to a cooling and heating heat pump. Background Art

[0002] A heat pump is a highly efficient heat-raising and energy-saving device. Its working principle is based on the principles of thermodynamics. By consuming a certain amount of high-grade thermal energy, it converts low-grade thermal energy that cannot be directly utilized (such as the thermal energy contained in air, soil, and water) into usable high-grade thermal energy, thereby achieving the purpose of saving some high-grade energy (such as coal, gas, oil, electricity, etc.).

[0003] The patent document with application number 201920481767.9 discloses a cooling and heating heat pump device, comprising a compressor, a reversing valve, a first heat exchanger, an economizer, a first electronic expansion valve, a first solenoid valve, a first one-way valve, a liquid storage tank (6), a first filter, a second electronic expansion valve, a second filter and a second heat exchanger connected in series in sequence, wherein the second heat exchanger is connected to the compressor through the reversing valve; the first heat exchanger is connected to the pipeline between the liquid storage tank (6) and the first filter through the second one-way valve; and further comprises a gas-liquid separator having one port connected to the compressor and the other port connected to the reversing valve.

[0004] However, traditional heating and cooling heat pumps mostly use air heat sources, which are easily affected by outdoor temperature. To solve this problem, some heat pumps will combine photovoltaic panels to provide heat sources. However, when using this method, the copper tubes inside the photovoltaic panels will generate pressure during defrosting, and the pressure that the photovoltaic panels can withstand often cannot meet the value of the pressure generated by the copper tubes. Therefore, it is easy to cause damage to the photovoltaic panels.

[0005] For example: when using a photovoltaic panel heat pump, a copper tube is installed inside the PV / T photovoltaic panel. The return air pressure of this copper tube during defrosting operation is within or equal to the safety pressure of the compressor, which is less than or equal to 2.8MPa. However, the PV / T photovoltaic panel can generally only withstand within 2.0MPa. When the machine is running defrosting, the pressure of the compressor return air increases and will enter the PV / T photovoltaic panel, causing damage due to excessive pressure. Utility Model Content

[0006] The utility model discloses a cooling and heating heat pump, which aims to solve the technical problem that the pressure that a photovoltaic panel can withstand often cannot meet the value of the pressure generated by a copper pipe, thereby causing damage to the photovoltaic panel.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A cooling and heating heat pump, comprising a heat pump main unit and a PV / T photovoltaic panel body, and further comprising:

[0009] Air source mechanism: the air source mechanism is arranged inside the heat pump host;

[0010] Photovoltaic heat absorption mechanism: the photovoltaic heat absorption mechanism is arranged on the PV / T photovoltaic panel body;

[0011] A compressor and a fin evaporator are provided inside the heat pump main unit, a copper tube is provided on the PV / T photovoltaic panel body, a PV / T photovoltaic panel stop valve is provided on one side outer wall of the heat pump main unit, the PV / T photovoltaic panel body is connected to the heat pump main unit through the PV / T photovoltaic panel stop valve, and a one-way valve is provided at the outlet end of the PV / T photovoltaic panel body, and the one-way valve is used in conjunction with the photovoltaic panel body and the compressor.

[0012] In this solution, a PV / T photovoltaic panel body is set on the outside of the heat pump main unit, which has a dual heat source side, namely, air source + PV / T photovoltaic heat absorption panel dual heat source. The return air pressure of the copper tube set inside the PV / T photovoltaic panel is within or equal to 2.8MPa when the defrost is running, and the one-way valve added at the refrigerant outlet of the PV / T photovoltaic panel body ensures that the pressure of the compressor return air increases when the machine is running defrost, but will not enter the PV / T photovoltaic panel body, so that it will not be damaged and the use effect is better.

[0013] In a preferred embodiment, the photovoltaic heat absorption mechanism includes an economizer and a PV / T photovoltaic panel electronic expansion valve and a PV / T photovoltaic panel electronic valve respectively arranged on the PV / T photovoltaic panel body. A filter is provided between the economizer and the liquid storage tank, and a main electronic expansion valve and an enthalpy-increasing electronic expansion valve are respectively provided between the economizer and the PV / T photovoltaic panel body. The PV / T photovoltaic panel body is connected to the vapor-liquid separator through the one-way valve, and the fin evaporator is connected in parallel with the PV / T photovoltaic panel solenoid valve.

[0014] With the above technical solution, when the photovoltaic heat absorption mechanism is working, the air source mechanism passes through the filter and directly enters the economizer and is then divided into two paths: the refrigerant liquid in the auxiliary path is throttled and depressurized by the enthalpy-increasing electronic expansion valve to become a gas-liquid mixture and then also enters the economizer. The two generate heat exchange in the economizer. The refrigerant liquid absorbs heat and becomes gas and is then sucked into the auxiliary air inlet of the compressor. The refrigerant in the main path releases heat and becomes supercooled liquid. After throttling and depressurizing by the main electronic expansion valve, one group enters the fin evaporator and is then sucked into the compressor suction port. The other group enters the PV / T photovoltaic panel solenoid valve connected in parallel with the fin evaporator, then enters the PV / T photovoltaic panel electronic expansion valve and then enters the copper pipe of the PV / T photovoltaic panel body, and then passes through the one-way valve back to the pipeline in front of the vapor-liquid separator. The refrigerant in the main path and the auxiliary path are mixed in the working chamber of the compressor, and then further compressed and discharged, forming a closed working cycle loop. The enthalpy-increasing air supply can increase the heating capacity of the unit and avoid excessive exhaust temperature in a low-temperature environment.

[0015] As can be seen from the above, a heat pump for heating and cooling includes a heat pump main unit and a PV / T photovoltaic panel body, and also includes:

[0016] Air source mechanism: the air source mechanism is arranged inside the heat pump host;

[0017] Photovoltaic heat absorption mechanism: the photovoltaic heat absorption mechanism is arranged on the PV / T photovoltaic panel body;

[0018] The heat pump main unit is equipped with a compressor and a finned evaporator. The PV / T photovoltaic panel body is equipped with a copper tube. A PV / T photovoltaic panel shut-off valve is installed on one outer wall of the heat pump main unit. The PV / T photovoltaic panel body is connected to the heat pump main unit via the PV / T photovoltaic panel shut-off valve. The outlet of the PV / T photovoltaic panel body is equipped with a one-way valve, which is used in conjunction with the photovoltaic panel body and the compressor. The cooling and heating heat pump provided by this utility model has a dual heat source of air source and PV / T photovoltaic heat absorption panel. The one-way valve prevents the increased pressure of the compressor return air from entering the PV / T photovoltaic panel body during defrosting operation, preventing damage to the PV / T photovoltaic panel body. Both heat sources can circulate heat, resulting in a better performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the overall structure of a cooling and heating heat pump proposed by the utility model.

[0020] Figure 2 This is a schematic diagram of the connection of a heat pump host of a cooling and heating heat pump proposed in the utility model.

[0021] Figure 3 This is a side view of the overall structure of a cooling and heating heat pump proposed by the utility model.

[0022] Figure 4 This is a schematic diagram of the connection of the PV / T photovoltaic panel body of a cooling and heating heat pump proposed in this utility model.

[0023] In the attached figure: 1. Heat pump main unit; 2. Finned evaporator; 3. Compressor; 4. Vapor-liquid separator; 5. High-efficiency tank heat exchanger; 6. Liquid storage tank; 7. Four-way valve; 8. PV / T photovoltaic panel body; 9. Circulating water pump; 10. Economizer; 11. PV / T photovoltaic panel electronic expansion valve; 12. PV / T photovoltaic panel solenoid valve; 13. One-way valve; 14. Filter; 15. Main electronic expansion valve; 16. Enthalpy increase electronic expansion valve; 17. Needle valve; 18. PV / T photovoltaic panel stop valve. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and marked in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work fall within the scope of protection of the present application.

[0025] The utility model discloses a cooling and heating heat pump which is mainly used in scenarios where the pressure that a photovoltaic panel can withstand often cannot meet the value of the pressure generated by a copper pipe, thereby causing damage to the photovoltaic panel.

[0026] Reference Figure 1 、 Figure 2 and Figure 3 A heat pump for heating and cooling, comprising a heat pump main unit 1 and a PV / T photovoltaic panel body 8, further comprising:

[0027] Air source mechanism: The air source mechanism is arranged inside the heat pump main unit 1;

[0028] Photovoltaic heat absorption mechanism: The photovoltaic heat absorption mechanism is provided on the PV / T photovoltaic panel body 8;

[0029] A compressor 3 and a finned evaporator 2 are provided inside the heat pump main unit 1, a copper tube is provided on the PV / T photovoltaic panel body 8, a PV / T photovoltaic panel stop valve 18 is provided on one side outer wall of the heat pump main unit 1, the PV / T photovoltaic panel body 8 is connected to the heat pump main unit 1 through the PV / T photovoltaic panel stop valve 18, and a one-way valve 13 is provided at the outlet end of the PV / T photovoltaic panel body 8. The one-way valve 13 is used in conjunction with the photovoltaic panel body and the compressor 3.

[0030] During the specific working process, the PV / T photovoltaic panel body 8 is installed on the outside of the heat pump host 1 through the PV / T photovoltaic panel stop valve 18, and has a dual heat source side, namely, air source + PV / T photovoltaic heat absorption panel dual heat source. A Φ7 copper pipe is run inside the PV / T photovoltaic panel. The return air pressure of this copper pipe during defrosting operation is less than or equal to the safety pressure of the compressor 3 within 2.8MPa, and a one-way valve 13 is added to the refrigerant operation outlet position of the PV / T photovoltaic panel body 8 to ensure that when the machine is running defrosting, the return air pressure of the compressor 3 increases, but will not enter the PV / T photovoltaic panel body 8, so that it will not be damaged.

[0031] Among them, the PV / T photovoltaic panel body 8 is located outside the heat pump host 1, and the interior of the heat pump host 1 can use the air as a low-level heat source. By setting the PV / T photovoltaic panel body 8 on the outside and connecting it to the heat pump host 1, solar energy can be used as a heat source, so that the heat pump host 1 has a double-sided heat source, which is more energy-saving and easy to use.

[0032] Reference Figure 1 、 Figure 2 and Figure 3 In a preferred embodiment, the air source mechanism includes a vapor-liquid separator 4, a high-efficiency tank heat exchanger 5, a liquid storage tank 6 and a four-way valve 7 provided inside the heat pump main unit 1. The fin evaporator 2, the compressor 3, the vapor-liquid separator 4 and the high-efficiency tank heat exchanger 5 are all connected through the four-way valve 7. A circulating water pump 9 is provided at the inlet end of the high-efficiency tank heat exchanger 5, and a needle valve 17 is provided on the liquid storage tank 6. The liquid storage tank 6 is respectively connected to the high-efficiency tank heat exchanger 5 and the fin evaporator 2.

[0033] Specifically, the high-temperature, high-pressure refrigerant gas discharged from the compressor 3 flows through the high-efficiency tank heat exchanger 5 through the four-way valve 7 to transfer heat to the heat-carrying medium and then becomes liquid. The high-pressure refrigerant liquid coming out of the high-efficiency tank heat exchanger 5 flows through the liquid storage tank 6, and the liquid storage tank 6 is equipped with a needle valve 17 for vacuuming. Finally, the refrigerant is introduced into the fin evaporator 2. In this process, the refrigerant absorbs heat in the low-temperature environment and becomes a low-pressure gas, which is then sucked into the air intake of the compressor 3, and circulates in sequence to achieve the heating effect.

[0034] Reference Figure 2 、 Figure 3 and Figure 4 In a preferred embodiment, the photovoltaic heat absorption mechanism includes an economizer 10 and a PV / T photovoltaic panel electronic expansion valve 11 and a PV / T photovoltaic panel electronic valve respectively arranged on the PV / T photovoltaic panel body 8. A filter 14 is provided between the economizer 10 and the liquid storage tank 6. A main electronic expansion valve 15 and an enthalpy-increasing electronic expansion valve 16 are respectively provided between the economizer 10 and the PV / T photovoltaic panel body 8. The PV / T photovoltaic panel body 8 is connected to the vapor-liquid separator 4 through a one-way valve 13, and the fin evaporator 2 is connected in parallel with the PV / T photovoltaic panel solenoid valve 12.

[0035] Specifically, when the photovoltaic heat absorption mechanism is working, the air source mechanism passes through the filter 14 and directly enters the economizer 10 and is divided into two paths: the refrigerant liquid in the auxiliary path is throttled and depressurized by the enthalpy-increasing electronic expansion valve 16 and becomes a gas-liquid mixture and then enters the economizer 10. The two generate heat exchange in the economizer 10. The refrigerant liquid in the auxiliary path absorbs heat and becomes gas and is then sucked into the auxiliary air inlet of the compressor 3. The refrigerant in the main path releases heat and becomes a supercooled liquid. After the main electronic expansion valve 15 throttles and depressurizes, one group enters the fin evaporator 2; in the fin In the fin evaporator 2, the refrigerant in the main circuit absorbs heat from the low-temperature environment and becomes low-pressure gas, which is sucked into the suction port of the compressor 3. Another group enters the PV / T photovoltaic panel solenoid valve 12 connected in parallel with the fin evaporator 2, then enters the PV / T photovoltaic panel electronic expansion valve 11 and then enters the copper tube of the PV / T photovoltaic panel body 8, and then passes through the one-way valve 13 and returns to the pipeline in front of the vapor-liquid separator 4; and the refrigerants in the main circuit and the auxiliary circuit are mixed in the working chamber of the compressor 3, and then further compressed and discharged to form a closed working cycle loop.

[0036] Among them, the economizer 10 is used in conjunction with the main electronic expansion valve 15 and the reheat electronic expansion valve 16 respectively, and the PV / T photovoltaic panel body 8 is used in conjunction with the compressor 3. At the position of the economizer 10, the photovoltaic heat absorption work can be divided into two paths and then mixed again. The refrigerant in the main path is throttled and reduced in pressure by the main electronic expansion valve 15, enters the fin evaporator 2, and is then sucked into the compressor 3. The refrigerant in the auxiliary path is throttled and reduced in pressure by the reheat electronic expansion valve 16, and is then sucked into the compressor 3 after heat exchange by the economizer 10. The two are mixed in the working chamber of the compressor 3, and then further compressed and discharged to form a closed working cycle loop. The PV / T photovoltaic panel body 8 and the compressor 3 cooperate with each other, that is, the air source + PV / T photovoltaic heat absorption panel dual heat sources work simultaneously, and circulate heating. The heat pump host 1 has a wider range of usage scenarios and is convenient and effective to use.

[0037] Working principle: When in use, the PV / T photovoltaic panel body 8 is installed on one side of the heat pump host 1 through the PV / T photovoltaic panel stop valve 18, so that the overall device can realize dual heat sources of air source + PV / T photovoltaic heat absorption panel. By adding a one-way valve 13 at the refrigerant operation outlet position of the PV / T photovoltaic panel body 8, it is ensured that the PV / T photovoltaic panel body 8 is not damaged. When the heat pump host 1 is running, the high-temperature and high-pressure refrigerant gas discharged by the compressor 3 flows through the high-efficiency tank heat exchanger 5 through the four-way valve 7 to transfer heat to the heat-carrying medium and then becomes liquid. The high-pressure refrigerant liquid coming out of the high-efficiency tank heat exchanger 5 flows through the liquid storage tank 6, and the liquid storage tank 6 is equipped with a needle valve 17 for vacuuming. After passing through the filter 14, it directly enters the economizer 10 and is divided into two paths: the refrigerant liquid in the auxiliary path is throttled and reduced in pressure by the enthalpy-increasing electronic expansion valve 16 to become a gas-liquid mixture. Then it also enters the economizer 10, where the two produce heat exchange. The refrigerant liquid in the auxiliary circuit absorbs heat and becomes gas, which is then sucked into the auxiliary air inlet of the compressor 3. The refrigerant in the main circuit releases heat and becomes supercooled liquid. After throttling and reducing the pressure through the main electronic expansion valve 15, one group enters the fin evaporator 2; in the fin evaporator 2, the refrigerant in the main circuit absorbs heat from the low-temperature environment and becomes low-pressure gas, which is sucked into the air intake of the compressor 3, and the other group enters the PV / T photovoltaic panel solenoid valve 12 connected in parallel with the fin evaporator 2, then enters the PV / T photovoltaic panel electronic expansion valve 11 and then enters the copper tube of the PV / T photovoltaic panel body 8, and then passes through the one-way valve 13 back to the pipeline in front of the vapor-liquid separator 4; and the refrigerants in the main circuit and the auxiliary circuit are mixed in the working chamber of the compressor 3, and then discharged after further compression, forming a closed working cycle loop.

[0038] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacements described may be partial structures, devices, or method steps, or they may be complete technical solutions. Any equivalent replacements or modifications based on the technical solution and the concept of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A cooling and heating heat pump, comprising a heat pump main unit (1) and a PV / T photovoltaic panel body (8), characterized in that: Also includes: Air source mechanism: the air source mechanism is arranged inside the heat pump main unit (1); Photovoltaic heat absorption mechanism: the photovoltaic heat absorption mechanism is arranged on the PV / T photovoltaic panel body (8); The heat pump main unit (1) is provided with a compressor (3) and a finned evaporator (2), the PV / T photovoltaic panel body (8) is provided with a copper pipe, a PV / T photovoltaic panel stop valve (18) is provided on one side outer wall of the heat pump main unit (1), the PV / T photovoltaic panel body (8) is connected to the heat pump main unit (1) via the PV / T photovoltaic panel stop valve (18), and a one-way valve (13) is provided at the outlet end of the PV / T photovoltaic panel body (8), and the one-way valve (13) is used in conjunction with the photovoltaic panel body and the compressor (3).

2. A cooling and heating heat pump according to claim 1, characterized in that: The PV / T photovoltaic panel body (8) is located outside the heat pump host (1).

3. A cooling and heating heat pump according to claim 1, characterized in that: The air source mechanism comprises a vapor-liquid separator (4), a high-efficiency tank heat exchanger (5), a liquid storage tank (6), and a four-way valve (7) arranged inside the heat pump main unit (1); the finned evaporator (2), the compressor (3), the vapor-liquid separator (4), and the high-efficiency tank heat exchanger (5) are all connected via the four-way valve (7).

4. A cooling and heating heat pump according to claim 3, characterized in that: A circulating water pump (9) is provided at the inlet end of the high-efficiency tank heat exchanger (5), a needle valve (17) is provided on the liquid storage tank (6), and the liquid storage tank (6) is connected to the high-efficiency tank heat exchanger (5) and the finned evaporator (2) respectively.

5. A cooling and heating heat pump according to claim 4, characterized in that: The photovoltaic heat absorption mechanism comprises an economizer (10) and a PV / T photovoltaic panel electronic expansion valve (11) and a PV / T photovoltaic panel solenoid valve (12) respectively arranged on the PV / T photovoltaic panel body (8); a filter (14) is provided between the economizer (10) and the liquid storage tank (6); and a main electronic expansion valve (15) and an enthalpy-increasing electronic expansion valve (16) are respectively provided between the economizer (10) and the PV / T photovoltaic panel body (8).

6. A cooling and heating heat pump according to claim 5, characterized in that: The PV / T photovoltaic panel body (8) is connected to the vapor-liquid separator (4) via the one-way valve (13), and the finned evaporator (2) is connected in parallel to the PV / T photovoltaic panel solenoid valve (12).

7. A cooling and heating heat pump according to claim 6, characterized in that: The economizer (10) is used in conjunction with the main electronic expansion valve (15) and the enthalpy-increasing electronic expansion valve (16), respectively, and the PV / T photovoltaic panel body (8) is used in conjunction with the compressor (3).

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