Solar heat pump air conditioner

Abstract

The invention discloses a solar heat pump air conditioner, which belongs to the technical field of refrigerating and heating equipment, and comprises a four-way reversing valve, a compressor, a condenser, an evaporator, a solar storage device, a first one-way valve and a second one-way valve, and four outlets of the four-way reversing valve are respectively connected with the compressor, the condenser and the evaporator; the solar heat pump air conditioner is further provided with a fifth pipeline, the solar energy storage device is located on the fifth pipeline, the fifth pipeline is arranged in parallel with a pipeline used for communicating the evaporator with the four-way reversing valve, a first one-way valve is arranged on the pipeline used for communicating the evaporator with the four-way reversing valve, and a medium flowing out of the evaporator can flow to the compressor through the first one-way valve. A second one-way valve is arranged on the fifth pipeline, and a medium flowing out of the compressor can flow to the evaporator through the second one-way valve; therefore, during refrigeration, a medium directly flows back to the compressor from the evaporator without passing through the solar storage device, and the technical effect that the refrigeration effect in summer is not reduced is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration and heating equipment, and in particular to a solar heat pump air conditioner. Background Art

[0002] Solar heat pump air conditioner is a cooling and heating device, which adds a solar energy storage device to the traditional air conditioner structure to achieve the purpose of increasing enthalpy and replenishing heat for the refrigerant, thereby saving electricity. However, in the prior art, a solenoid valve is used to connect the four-way reversing valve and the solar energy storage device. During use, the solenoid valve may not be fully closed or not closed, causing the medium to pass through the solar energy storage device, absorb heat and then flow back, resulting in poor cooling effect in summer.

[0003] Therefore, how to provide a solar heat pump air conditioner so that the medium does not pass through the solar energy storage device during summer cooling to ensure that the summer cooling effect is not reduced is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] The purpose of the present invention is to provide a solar heat pump air conditioner in view of the defects and shortcomings in the prior art, which improves the heating effect while allowing the medium to flow directly back from the evaporator to the compressor without passing through a solar energy storage device during cooling, thereby not reducing the cooling effect.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention provides a solar heat pump air conditioner, comprising a four-way reversing valve, a compressor, a condenser, an evaporator, a solar energy storage device, a first one-way valve and a second one-way valve, wherein four outlets of the four-way reversing valve are respectively connected to the compressor, the condenser and the evaporator;

[0007] The solar heat pump air conditioner is also provided with a fifth pipeline, the solar energy storage device is located in the fifth pipeline, the fifth pipeline is arranged in parallel with the pipeline for connecting the evaporator and the four-way reversing valve, the pipeline for connecting the evaporator and the four-way reversing valve is provided with the first one-way valve, the medium flowing out of the evaporator can only flow to the compressor through the first one-way valve, the fifth pipeline is provided with the second one-way valve, the medium flowing out of the compressor can only flow to the evaporator through the second one-way valve.

[0008] Preferably, the second one-way valve is located between the solar energy storage device and the evaporator.

[0009] Preferably, an expansion valve is further provided between the condenser and the evaporator.

[0010] Preferably, the solar heat pump air conditioner also includes a second heat supplement device, which is connected to a non-solar heat source through a pipeline. The second heat supplement device is connected in series with the solar storage device. Along the flow direction of the medium in the fifth pipeline, the second heat supplement device is located before the second one-way valve.

[0011] Preferably, a switch valve is provided on the pipeline connecting the second heat supplement device and the non-solar heat source.

[0012] Preferably, a first temperature sensor is provided inside the solar energy storage device, a second temperature sensor is provided inside the second heat supplement device, and the first temperature sensor, the second temperature sensor and the switch valve are all electrically connected to the control device.

[0013] Compared with the prior art, the present invention has achieved the following technical effects:

[0014] 1. The present invention arranges a first one-way valve on the pipeline directly connecting the evaporator and the four-way reversing valve, and arranges a second one-way valve on the fifth pipeline, so that during heating, the medium flowing out of the compressor flows into the evaporator after passing through the solar heat exchanger, thereby improving the heating effect; during cooling, the medium flowing out of the evaporator does not pass through the solar heat exchanger, but directly flows back to the compressor, thereby not reducing the cooling effect; that is, the technical effect of improving the heating effect while not reducing the cooling effect is achieved, and because the one-way valve has high working reliability and low failure rate, it can reduce the probability of the medium flowing through the solar energy storage device and then flowing back to the compressor during cooling, thereby improving the working reliability of the device; in addition, compared with the solenoid valve, the one-way valve is cheap, which can reduce the production cost of the device.

[0015] Other technical solutions of the present invention have achieved the following technical effects compared with the prior art:

[0016] 2. The present invention arranges a second heat supplement device in series with the solar energy storage device on the fifth pipeline, so that when heating, the device can have three working modes: heat supplement through the solar energy storage device, heat supplement through the second heat supplement device, and heat supplement through the solar energy storage device and the second heat supplement device together. This compensates for the instability when heat supplement is only performed by the solar energy storage device, reduces the fluctuation of the heat supplement amount obtained by the medium under different external environments, and thus improves the working stability of the device when heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, 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 creative labor.

[0018] Figure 1 It is a structural schematic diagram of a first embodiment of a solar heat pump air conditioner;

[0019] Figure 2 It is a schematic structural diagram of a second embodiment of a solar heat pump air conditioner.

[0020] Among them, 1. four-way reversing valve; 2. compressor; 3. condenser; 4. evaporator; 5. solar energy storage device; 6. first one-way valve; 7. second one-way valve; 8. first pipeline; 9. second pipeline; 10. third pipeline; 11. fourth pipeline; 12. fifth pipeline; 13. expansion valve; 14. second heat supplement device; 15. sixth pipeline; 16. switch valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, the present invention provides a solar heat pump air conditioner, comprising a four-way reversing valve 1, a compressor 2, a condenser 3, an evaporator 4, a solar energy storage device 5, a first one-way valve 6 and a second one-way valve 7. The four outlets of the four-way reversing valve 1 are respectively connected to the compressor 2, the condenser 3 and the evaporator 4; that is, the four-way reversing valve 1 is connected to the outlet of the compressor 2 through the first pipeline 8, is connected to the condenser 3 through the second pipeline 9, is connected to the evaporator 4 through the third pipeline 10, and is connected to the inlet of the compressor 2 through the fourth pipeline 11.

[0024] The solar heat pump air conditioner is also provided with a fifth pipeline 12, the solar energy storage device 5 is located in the fifth pipeline 12, the fifth pipeline 12 is arranged in parallel with the third pipeline 10, the third pipeline 10 is provided with a first one-way valve 6, the medium flowing out of the evaporator 4 can only flow to the compressor 2 through the first one-way valve 6, and cannot flow in the opposite direction, and the fifth pipeline 12 is provided with a second one-way valve 7, the medium flowing out of the compressor 2 can only flow to the evaporator 4 through the second one-way valve 7, and cannot flow in the opposite direction.

[0025] During refrigeration, the medium flowing out of the compressor 2 passes through the four-way reversing valve 1, the condenser 3, and the evaporator 4 in sequence, and the medium flowing out of the evaporator 4 flows back to the compressor 2 through the third pipeline 10. Since the medium after absorbing heat and vaporizing in the evaporator 4 does not flow through the solar energy storage device 5, compared with the situation where the medium first flows through the solar energy storage device 5 and then flows into the compressor 2, the present application can reduce the temperature of the medium flowing into the compressor 2. When the compression capacity of the compressor 2 remains unchanged, the temperature of the medium flowing out of the compressor 2 again can be reduced. When the condensing capacity of the condenser 3 remains unchanged, the temperature of the medium that becomes liquid after passing through the condenser 3 can be reduced, so that the liquid medium needs to absorb more heat to become gaseous when passing through the evaporator, thereby improving the refrigeration effect of the solar heat pump air conditioner.

[0026] During heating, the medium flowing out of the compressor 2 passes through the four-way reversing valve 1 and flows along the fifth pipeline 12 to the solar energy storage device 5. After fully absorbing the heat stored in the solar energy storage device 5, it flows back to the compressor 2 through the evaporator 4 and the condenser 3. Since the temperature of the medium entering the evaporator 4 is relatively high, when the evaporation capacity of the evaporator 4 remains unchanged, the temperature of the gaseous medium flowing out of the evaporator 4 is also relatively high, so that the gaseous medium needs to dissipate more heat into the surrounding air in the condenser 3 before it can become liquid, thereby improving the heating effect of the solar heat pump air conditioner.

[0027] If the second one-way valve 7 is located between the solar energy storage device 5 and the four-way reversing valve 1, part of the medium flowing out of the evaporator 4 will first flow through the solar energy storage device 5, and then return to the third pipeline 10. Although the temperature of the medium will be lower than that of the medium flowing directly through the solar energy storage device 5 back to the compressor 2, it will still increase the temperature of the medium flowing back to the compressor 2 to a certain extent. For this reason, the present application sets the second one-way valve 7 between the solar energy storage device 5 and the evaporator 4, so that the medium flowing out of the evaporator 4 does not pass through the solar energy storage device 5, but directly flows back to the compressor 2 through the third pipeline 10, thereby reducing the temperature of the medium flowing back to the compressor 2. In addition, an expansion valve 13 is also provided between the condenser 3 and the evaporator 4 to achieve the functions of throttling and pressure stabilization.

[0028] When the temperature is low in winter, the solar energy storage device 5 is basically unable to accumulate heat, and the solar energy storage device 5 loses the effect of supplementing heat to the medium. Figure 2 As shown, for this purpose, the solar heat pump air conditioner of the present application also includes a second heat supplement device 14, which is connected to a non-solar heat source through a sixth pipeline 15, wherein the second heat supplement device 14 is a component for storing heat, and the non-solar heat source can be heat generated by a thermal power plant, heat generated by a chemical reaction, groundwater heat source, geothermal heat, etc. A switch valve 16 is provided on the sixth pipeline 15, and the second heat supplement device 14 is connected in series with the solar energy storage device 5. The second heat supplement device 14 is located in front of the inlet of the second one-way valve 7, and the medium flowing out of the compressor 2 first passes through the second heat supplement device 14 and the solar energy storage device 5 and then flows through the second one-way valve 7, so as to supplement heat for the medium through the second heat supplement device 14 when the solar energy storage device 5 cannot work normally.

[0029] Since the heat of the sun fluctuates at different times, if the second heat supplement device 14 is started to supplement heat for the medium only when the solar energy storage device 5 is not working, the working stability of the device will be reduced. For this reason, the present application sets a first temperature sensor inside the solar energy storage device 5, and sets a second temperature sensor inside the second heat supplement device 14. The first temperature sensor, the second temperature sensor and the switch valve 16 are all electrically connected to the control device. When the heat accumulated in the solar energy storage device 5 is lower than a certain value (the value can be set according to actual needs), the control device opens the switch valve 16 and adjusts the opening of the switch valve 16 so that the heat supplemented by the medium after passing through the second heat supplement device 14 and the solar energy storage device 5 is maintained near the set value; when the heat accumulated in the solar energy storage device 5 is large and the heat supplement demand of the medium can be met only by the solar energy storage device 5, the control device controls the switch valve 16 to close, and at this time, the heat is supplemented for the medium only by the solar energy storage device 5 to avoid excessive heat supplement for the medium. That is, the present application can reduce the fluctuation of the heat supplement of the medium when the device is heating, and improve the stability of the heating effect.

[0030] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A solar heat pump air conditioner, characterized in that: It includes a four-way reversing valve, a compressor, a condenser, an evaporator, a solar energy storage device, a first one-way valve and a second one-way valve, wherein four outlets of the four-way reversing valve are respectively connected to the compressor, the condenser and the evaporator; The solar heat pump air conditioner is also provided with a fifth pipeline, the solar energy storage device is located in the fifth pipeline, the fifth pipeline is arranged in parallel with the pipeline for connecting the evaporator and the four-way reversing valve, the pipeline for connecting the evaporator and the four-way reversing valve is provided with the first one-way valve, the medium flowing out of the evaporator can only flow to the compressor through the first one-way valve, the fifth pipeline is provided with the second one-way valve, the medium flowing out of the compressor can only flow to the evaporator through the second one-way valve.

2. The solar heat pump air conditioner according to claim 1, characterized in that: The second one-way valve is located between the solar energy storage device and the evaporator.

3. The solar heat pump air conditioner according to claim 1 or 2, characterized in that: An expansion valve is also provided between the condenser and the evaporator.

4. The solar heat pump air conditioner according to claim 3, characterized in that: The solar heat pump air conditioner also includes a second heat supplement device, which is connected to a non-solar heat source through a pipeline. The second heat supplement device is connected in series with the solar storage device. Along the flow direction of the medium in the fifth pipeline, the second heat supplement device is located before the second one-way valve.

5. The solar heat pump air conditioner according to claim 4, characterized in that: A switch valve is provided on the pipeline connecting the second heat supplement device and the non-solar heat source.

6. The solar heat pump air conditioner according to claim 5, characterized in that: A first temperature sensor is disposed inside the solar energy storage device, a second temperature sensor is disposed inside the second heat supplement device, and the first temperature sensor, the second temperature sensor and the switch valve are all electrically connected to the control device.

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