Heat pump system with solar heat exchange system

Abstract

The utility model relates to the technical field of heat pumps, in particular to a heat pump system with a solar heat exchange system. According to the scheme, a solar heat exchange system is arranged on a heat pump system, a closed loop formed by a gas pipe, a liquid pipe and a solar pipe in the system is connected with a gas-liquid separator in the heat pump system, the gas-liquid separator serves as a condensation end in the heat pump system, and a large amount of liquid refrigerant is stored in the gas-liquid separator; a refrigerant in the closed loop absorbs solar energy and then evaporates into a gaseous refrigerant to enter the gas-liquid separator, so that a liquid refrigerant in the gas-liquid separator absorbs heat and evaporates to be supplemented into an air suction port of the compressor, and the heating capacity of the unit is improved. It needs to be explained herein that the arrangement of the needle valve is to adjust the refrigerant amount in the closed loop. In addition, the air inlet pipe, the air outlet pipe and the solar pipe form an open flow path, air can be directly introduced to absorb heat of solar energy, high-temperature energy is directly provided for the second heat exchanger, and the heating capacity and energy efficiency of the unit are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a heat pump system with a solar energy heat exchange system. Background Art

[0002] In the cold north, especially in winter, the performance of existing heat pump systems decreases significantly at low temperatures, the heating capacity is limited, and the user experience is poor. Summary of the invention

[0003] In order to solve the above problems, the purpose of the utility model is to provide a heat pump system with a solar heat exchange system, which can absorb solar energy to exchange heat with the heat pump system to provide energy, or absorb solar energy to directly provide energy to the heat pump system, thereby improving the heating capacity of the unit.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A heat pump system with a solar heat exchange system, the heat pump system includes a compressor, a four-way valve, a first heat exchanger and a second heat exchanger which sequentially constitute a refrigerant main circuit, a gas-liquid separator is provided between the compressor suction port and the four-way valve, and is characterized in that: a solar heat exchange system is provided below the gas-liquid separator, the solar heat exchange system includes an air pipe, a liquid pipe and a solar panel, a solar tube is laid on the solar panel, and the air pipe, the liquid pipe and the solar tube constitute a closed circuit; the connecting part of the air pipe and the liquid pipe is placed in the gas-liquid separator, and the connecting end of the air pipe and the gas-liquid separator is located at the upper part of the gas-liquid separator, and the connecting end of the liquid pipe and the gas-liquid separator is located at the lower part of the gas-liquid separator, and a needle valve is provided on the air pipe or the liquid pipe.

[0006] Preferably, the solar tube is bent and laid on the solar panel.

[0007] Preferably, the connecting portion of the gas pipe and the liquid pipe is spirally arranged in the gas-liquid separator.

[0008] Preferably, a first solenoid valve is provided on the liquid pipe, and a second solenoid valve is provided on the gas pipe.

[0009] Preferably, an air inlet pipe is provided at the connection end between the liquid pipe and the solar tube, an inlet fan is installed on the air inlet pipe, an air outlet pipe is provided at the connection end between the air pipe and the solar tube, an end extension section of the air outlet pipe is close to the second heat exchanger, and a plurality of shunt pipes with their pipe openings facing the second heat exchanger are connected on the extension section.

[0010] Preferably, a third solenoid valve is provided on the air inlet pipe in front of the inlet fan of the device, and a fourth solenoid valve is provided on the air outlet pipe.

[0011] Preferably, a three-way valve is provided at the connecting end of the liquid pipe and the solar tube and at the connecting end of the air pipe and the solar tube, and the three-way valve includes an air port communicated with the air inlet pipe or the air outlet pipe, a liquid port communicated with the air pipe or the liquid pipe, and a partition port communicated with the solar tube; the solar tube is a double-layer tube, the inner side is a refrigerant copper tube, and the outer side is an air tube, the outer side of the partition port is a ventilation layer communicated with the air pipe, and the inner side of the partition port is a refrigerant layer communicated with the refrigerant copper tube.

[0012] Preferably, a third heat exchanger is provided between the first heat exchanger and the second heat exchanger, one side of the upper part of the third heat exchanger is connected to the first heat exchanger, and the other side is connected to the middle air supply port of the compressor, one side of the lower part of the third heat exchanger is connected to the second heat exchanger through a first branch, and the other side is connected to a second branch, the other end of the second branch is connected to the first branch, a first expansion valve is provided on the first branch, and a second expansion valve is provided on the second branch.

[0013] The utility model adopts the above technical solution, by arranging a solar heat exchange system on the heat pump system, the closed loop formed by the gas pipe, liquid pipe and solar tube in the system is connected to the gas-liquid separator in the heat pump system, the gas-liquid separator serves as the condensation end in the heat pump system, and a large amount of liquid refrigerant is stored inside. The refrigerant in the closed loop absorbs solar energy and evaporates into gaseous refrigerant and enters the gas-liquid separator, so that the liquid refrigerant in the gas-liquid separator absorbs heat and evaporates and is replenished into the air intake of the compressor, thereby improving the heating capacity of the unit. It should be noted here that the needle valve is provided to adjust the amount of refrigerant in the closed loop. In addition, the open flow path formed by the air inlet pipe, the air outlet pipe and the solar tube can directly let in air to absorb the heat of solar energy, directly provide high-temperature energy for the second heat exchanger, and improve the heating capacity and energy efficiency of the unit.

[0014] Specifically, when the heat pump system is in heating mode, the refrigerant passes through the compressor exhaust port, the four-way valve, the first heat exchanger, the third heat exchanger, the second heat exchanger, the four-way valve, the gas-liquid separator to the compressor suction port in sequence.

[0015] Closed loop in solar heat exchange system: condensed liquid refrigerant enters the solar tube through the three-way valve, and the solar panel absorbs solar radiation energy to make the liquid refrigerant fully absorb heat and evaporate to form gaseous refrigerant. The gaseous refrigerant flows out of the solar tube from the three-way valve, passes through the second solenoid valve and enters the gas-liquid separator. In the condensation end (gas-liquid separator), the gaseous refrigerant condenses into liquid refrigerant after being cooled. The liquid refrigerant flows out of the gas-liquid separator, passes through the first solenoid valve, and enters the solar tube to form a complete refrigeration loop.

[0016] It should be noted here that the solar panel absorbs solar radiation energy and transfers heat to the evaporation end (solar tube), so that the liquid refrigerant in the solar tube is fully evaporated. Since the density of the gas refrigerant is smaller than that of the liquid refrigerant, all the gas refrigerant spontaneously moves upward (set below the gas-liquid separator) and enters the condensation end (gas-liquid separator) after passing through the second solenoid valve. After the gas refrigerant is subjected to the low-temperature refrigerant or the normal-temperature refrigerant at the condensation end (gas-liquid separator), the energy in the high-temperature refrigerant will spontaneously transfer to the refrigerant with a temperature lower than its temperature. The high-temperature refrigerant condenses into liquid after releasing heat. The liquid refrigerant is affected by gravity and spontaneously flows through the first solenoid valve and flows into the evaporation end (solar tube) of the device to form a loop.

[0017] Open flow path in solar heat exchange system: open the third solenoid valve, start the device inlet fan, supply air, the air is heated by the solar panel, in this process the internal air pressure increases, the gas flow rate increases, flows from the three-way valve to the fourth solenoid valve, open the fourth solenoid valve, flows to the shunt pipe, provides high temperature energy to the second heat exchanger, improves the heating capacity and energy efficiency of the unit. This function is effective when the ambient temperature is below 7°C. It should be noted here that in order to improve the direct heating effect of the high temperature gas at the shunt pipe, the end of the outlet pipe should be closed.

[0018] It should also be noted here that the solar tube has a double-layer structure and is partitioned at the three-way valve. The air and refrigerant flow separately. Therefore, the open flow path and the closed loop can be flexibly selected to operate simultaneously or separately.

[0019] The beneficial effects of the above solution adopted by the utility model are:

[0020] 1. The newly added solar heat exchange system is green and pollution-free, achieving zero carbon emissions.

[0021] 2. The refrigerant flow is achieved through gravity and the physical properties of the refrigerant itself, saving energy consumption of the pump in the system.

[0022] 3. The solar heat exchange system is used for normal heating and is suitable for any heating occasion.

[0023] 4. The solar heat exchange system can improve the heat exchange capacity of some refrigerants through the gas-liquid separator in the heat pump system.

[0024] 5. The solar heat exchange system can effectively prevent liquid backflow through the gas-liquid separator in the heat pump system.

[0025] 6. The solar heat exchange system directly supplies heat to the heat exchanger through the shunt pipe, which can improve the heating capacity and energy efficiency of the unit.

[0026] 7. Reduce the unit's operating heating time in winter and increase the unit's overall life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The flow chart of the heat pump system in heating mode and operating simultaneously with the solar heat exchange system.

[0028] Figure 2 for Figure 1 Schematic diagram of the cross section of the three-way valve at A and B.

[0029] Figure 3 A schematic cross-sectional view of a solar tube.

[0030] Figure 4 Flow chart of the closed loop formed by gas pipe, liquid pipe and solar tube.

[0031] Figure 5 The figure is a flow chart of air flow in the air inlet pipe, air outlet pipe and solar tube.

[0032] Figure 6 This is the air supply flow chart of the third heat exchanger. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] like Figures 1 to 6 A heat pump system with a solar heat exchange system is shown, the heat pump system includes a compressor 1, a four-way valve 2, a first heat exchanger 3 and a second heat exchanger 4 which sequentially constitute a refrigerant main circuit, a gas-liquid separator 6 is provided between the compressor suction port 5 and the four-way valve 2, a solar heat exchange system is provided below the gas-liquid separator 6, the solar heat exchange system includes an air pipe 7, a liquid pipe 8 and a solar panel 9, a solar tube 10 is laid on the solar panel 9, and the air pipe 7, the liquid pipe 8 and the solar tube 10 form a closed loop; the connecting part of the air pipe 7 and the liquid pipe 8 is placed in the gas-liquid separator 6, and the connecting end of the air pipe 7 and the gas-liquid separator 6 is located at the upper part of the gas-liquid separator 6, and the connecting end of the liquid pipe 8 and the gas-liquid separator 6 is located at the lower part of the gas-liquid separator 6, and a needle valve is provided on the air pipe 7 or the liquid pipe 8.

[0039] Furthermore, the solar tube 10 is bent and laid on the solar panel 9. In this technical solution, the bent and laid solar tube can improve the heating path and absorb more heat.

[0040] Furthermore, the connection part of the gas pipe 7 and the liquid pipe 8 is spirally arranged in the gas-liquid separator 6. In this technical solution, the connection part of the gas pipe 7 and the liquid pipe 8 arranged spirally allows the heat of the gaseous refrigerant to be fully released.

[0041] Furthermore, the liquid pipe 8 is provided with a first solenoid valve 11 , and the gas pipe 7 is provided with a second solenoid valve 12 .

[0042] Furthermore, an air inlet pipe 13 is provided at the connection end between the liquid pipe 8 and the solar tube 10, and an inlet fan 14 is installed on the air inlet pipe 13. An air outlet pipe 15 is provided at the connection end between the air pipe 7 and the solar tube 10. The terminal extension section of the air outlet pipe 15 is close to the second heat exchanger 4, and the extension section is connected to a plurality of shunt pipes 16 with the pipe openings facing the second heat exchanger 4.

[0043] Furthermore, a third solenoid valve 17 is provided on the air inlet pipe 13 in front of the device inlet fan 14 , and a fourth solenoid valve 18 is provided on the air outlet pipe 15 .

[0044] Furthermore, three-way valves are provided at the connecting ends of the liquid pipe 8 and the solar tube 10 and at the connecting ends of the air pipe 7 and the solar tube 10, and the three-way valves include an air port 19 communicated with the air inlet pipe 13 or the air outlet pipe 15, a liquid port 20 communicated with the air pipe 7 or the liquid pipe 8, and a partition port 21 communicated with the solar tube 10; the solar tube 10 is a double-layer tube, with a refrigerant copper tube 22 on the inside and an air tube 23 on the outside, the outer side of the partition port 21 is a ventilation layer 24 communicated with the air tube 23, and the inner side of the partition port 21 is a refrigerant layer 25 communicated with the refrigerant copper tube 22.

[0045] Furthermore, a third heat exchanger 26 is provided between the first heat exchanger 3 and the second heat exchanger 4. One side of the upper part of the third heat exchanger 26 is connected to the first heat exchanger 3, and the other side is connected to the middle air supply port 27 of the compressor 1. One side of the lower part of the third heat exchanger 26 is connected to the second heat exchanger 4 through a first branch 28, and a second branch 29 is provided on the other side. The other end of the second branch 29 is connected to the first branch 28. A first expansion valve 30 is provided on the first branch 28, and a second expansion valve 31 is provided on the second branch 29.

[0046] In this specific embodiment, in order to solve the problem of insufficient heating capacity of the existing unit under low temperature, the above scheme is to set a solar heat exchange system on the heat pump system. The closed loop composed of the gas pipe, liquid pipe and solar tube in the system is connected to the gas-liquid separator in the heat pump system. The gas-liquid separator serves as the condensing end in the heat pump system, and a large amount of liquid refrigerant is stored inside. The refrigerant in the closed loop absorbs solar energy and evaporates into gaseous refrigerant and enters the gas-liquid separator, so that the liquid refrigerant in the gas-liquid separator absorbs heat and evaporates and is replenished into the compressor suction port, thereby improving the heating capacity of the unit. It should be noted here that the needle valve is set to adjust the amount of refrigerant in the closed loop. In addition, the open flow path composed of the air inlet pipe, the air outlet pipe and the solar tube can directly let in air to absorb the heat of solar energy, directly provide high-temperature energy for the second heat exchanger, and improve the heating capacity and energy efficiency of the unit.

[0047] Specifically, when the heat pump system is in heating mode, the refrigerant passes through the compressor exhaust port 100, the four-way valve, the first heat exchanger, the third heat exchanger, the second heat exchanger, the four-way valve, the gas-liquid separator to the compressor suction port in sequence.

[0048] Closed loop in solar heat exchange system: condensed liquid refrigerant enters the solar tube through the three-way valve, and the solar panel absorbs solar radiation energy to make the liquid refrigerant fully absorb heat and evaporate to form gaseous refrigerant. The gaseous refrigerant flows out of the solar tube from the three-way valve, passes through the second solenoid valve and enters the gas-liquid separator. In the condensation end (gas-liquid separator), the gaseous refrigerant condenses into liquid refrigerant after being cooled. The liquid refrigerant flows out of the gas-liquid separator, passes through the first solenoid valve, and enters the solar tube to form a complete refrigeration loop.

[0049] It should be noted here that the solar panel absorbs solar radiation energy and transfers heat to the evaporation end (solar tube), so that the liquid refrigerant in the solar tube is fully evaporated. Since the density of the gas refrigerant is smaller than that of the liquid refrigerant, all the gas refrigerant spontaneously moves upward (set below the gas-liquid separator) and enters the condensation end (gas-liquid separator) after passing through the second solenoid valve. After the gas refrigerant is subjected to the low-temperature refrigerant or the normal-temperature refrigerant at the condensation end (gas-liquid separator), the energy in the high-temperature refrigerant will spontaneously transfer to the refrigerant with a temperature lower than its temperature. The high-temperature refrigerant condenses into liquid after releasing heat. The liquid refrigerant is affected by gravity and spontaneously flows through the first solenoid valve and flows into the evaporation end (solar tube) of the device to form a loop.

[0050] Open flow path in solar heat exchange system: open the third solenoid valve, start the device inlet fan, supply air, the air is heated by the solar panel, in this process the internal air pressure increases, the gas flow rate increases, flows from the three-way valve to the fourth solenoid valve, open the fourth solenoid valve, flows to the shunt pipe, provides high temperature energy to the second heat exchanger, improves the heating capacity and energy efficiency of the unit. This function is effective when the ambient temperature is below 7°C. It should be noted here that in order to improve the direct heating effect of the high temperature gas at the shunt pipe, the end of the outlet pipe should be closed.

[0051] It should also be noted here that the solar tube has a double-layer structure and is partitioned at the three-way valve. The air and refrigerant flow separately. Therefore, the open flow path and the closed loop can be flexibly selected to operate simultaneously or separately.

[0052] It should be further explained that this solution relies on absorbing green energy such as solar energy. The heat absorption efficiency of the solar heat exchange system will decrease in rainy weather relative to sunny weather.

[0053] It should also be noted that the third heat exchanger is a small heat exchanger that can replenish air for the compressor and improve the performance of the unit.

[0054] Furthermore, the beneficial effects of this solution are:

[0055] 1. The newly added solar heat exchange system is green and pollution-free, achieving zero carbon emissions.

[0056] 2. The refrigerant flow is achieved through gravity and the physical properties of the refrigerant itself, saving energy consumption of the pump in the system.

[0057] 3. The solar heat exchange system is used for normal heating and is suitable for any heating occasion.

[0058] 4. The solar heat exchange system can improve the heat exchange capacity of some refrigerants through the gas-liquid separator in the heat pump system.

[0059] 5. The solar heat exchange system can effectively prevent liquid backflow through the gas-liquid separator in the heat pump system.

[0060] 6. The solar heat exchange system directly supplies heat to the heat exchanger through the shunt pipe, which can improve the heating capacity and energy efficiency of the unit.

[0061] 7. Reduce the unit's operating heating time in winter and increase the unit's overall life.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A heat pump system with a solar heat exchange system, the heat pump system comprising a compressor (1), a four-way valve (2), a first heat exchanger (3) and a second heat exchanger (4) which sequentially constitute a refrigerant main circuit, a gas-liquid separator (6) being provided between an air intake port (5) of the compressor and the four-way valve (2), characterized in that: A solar heat exchange system is arranged below the gas-liquid separator (6), the solar heat exchange system comprising a gas pipe (7), a liquid pipe (8) and a solar panel (9), a solar tube (10) being laid on the solar panel (9), the gas pipe (7), the liquid pipe (8) and the solar tube (10) forming a closed loop; the connecting part of the gas pipe (7) and the liquid pipe (8) is arranged inside the gas-liquid separator (6), the connecting end of the gas pipe (7) and the gas-liquid separator (6) is located at the upper part of the gas-liquid separator (6), the connecting end of the liquid pipe (8) and the gas-liquid separator (6) is located at the lower part of the gas-liquid separator (6), and a needle valve is arranged on the gas pipe (7) or the liquid pipe (8).

2. A heat pump system with a solar heat exchange system according to claim 1, characterized in that: The solar tube (10) is bent and laid on the solar panel (9).

3. A heat pump system with a solar heat exchange system according to claim 1, characterized in that: The connection portion of the gas pipe (7) and the liquid pipe (8) is spirally arranged in the gas-liquid separator (6).

4. A heat pump system with a solar heat exchange system according to claim 1, characterized in that: The liquid pipe (8) is provided with a first solenoid valve (11), and the gas pipe (7) is provided with a second solenoid valve (12).

5. A heat pump system with a solar heat exchange system according to claim 4, characterized in that: An air inlet pipe (13) is provided at the connection end between the liquid pipe (8) and the solar tube (10), and an inlet fan (14) is provided on the air inlet pipe (13). An air outlet pipe (15) is provided at the connection end between the air pipe (7) and the solar tube (10), and an end extension section of the air outlet pipe (15) is close to the second heat exchanger (4), and the extension section is connected to a plurality of flow divider pipes (16) with their pipe openings facing the second heat exchanger (4).

6. A heat pump system with a solar heat exchange system according to claim 5, characterized in that: A third solenoid valve (17) is provided on the air inlet pipe (13) in front of the device inlet fan (14), and a fourth solenoid valve (18) is provided on the air outlet pipe (15).

7. A heat pump system with a solar heat exchange system according to claim 6, characterized in that: A three-way valve is provided at the connection end between the liquid pipe (8) and the solar tube (10) and the connection end between the air pipe (7) and the solar tube (10), the three-way valve comprising an air port (19) communicating with the air inlet pipe (13) or the air outlet pipe (15), a liquid port (20) communicating with the air pipe (7) or the liquid pipe (8), and a partition port (21) communicating with the solar tube (10); the solar tube (10) is a double-layer tube, the inner side of which is a refrigerant copper tube (22) and the outer side is an air tube (23); the outer side of the partition port (21) is a ventilation layer (24) communicating with the air tube (23), and the inner side of the partition port (21) is a refrigerant layer (25) communicating with the refrigerant copper tube (22).

8. The heat pump system with a solar heat exchange system according to claim 1, characterized in that: A third heat exchanger (26) is provided between the first heat exchanger (3) and the second heat exchanger (4); one side of the upper portion of the third heat exchanger (26) is connected to the first heat exchanger (3), and the other side is connected to the middle air supply port (27) of the compressor (1); one side of the lower portion of the third heat exchanger (26) is connected to the second heat exchanger (4) via a first branch (28), and the other side is connected to a second branch (29); the other end of the second branch (29) is connected to the first branch (28); a first expansion valve (30) is provided on the first branch (28), and a second expansion valve (31) is provided on the second branch (29).

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