Heat pump air conditioner

Abstract

The invention relates to the technical field of air conditioners, in particular to a heat pump air conditioner. The problem that the dehumidification process is not ideal in effect is solved. In order to achieve the purpose, the heat pump air conditioner comprises a compressor, an outdoor heat exchanger, an ejector, a gas-liquid separator, a first indoor heat exchanger, a second indoor heat exchanger and a vortex tube, an exhaust port of the compressor communicates with a first port of the outdoor heat exchanger, and a second port of the outdoor heat exchanger communicates with an inlet of the ejector; an outlet of the ejector communicates with an inlet of the gas-liquid separator, an exhaust port of the gas-liquid separator communicates with an air suction port of the compressor, a liquid discharge port of the gas-liquid separator communicates with an inlet of the vortex tube, and a hot end outlet and a cold end outlet of the vortex tube communicate with a first port of the first indoor heat exchanger and a first port of the second indoor heat exchanger correspondingly. The second indoor heat exchanger and the first indoor heat exchanger are sequentially arranged in the air outlet direction. By overlapping the ejector and the vortex tube, dehumidification without cooling can be achieved, and the dehumidification effect can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to a heat pump air conditioner. Background Art

[0002] Traditional air conditioners achieve dehumidification of air by reducing the evaporation temperature. However, the temperature of the dehumidified air is relatively low, and directly blowing the air will affect the user experience. Therefore, it is necessary to increase the supply air temperature by heating after dehumidification.

[0003] Currently, the common technical solution for increasing the supply air temperature during the dehumidification process is to set up a bypass pipeline and a reheating heat exchanger. The refrigerant discharged from the condenser is diverted to the reheating heat exchanger. Under the dehumidification condition, after the indoor return air is cooled and dehumidified by the evaporator, it then passes through the reheating heat exchanger to increase the temperature and is then sent into the room.

[0004] Although this technical solution increases the return air temperature to a certain extent, since the temperature of the refrigerant discharged from the condenser is relatively low, the heat is not sufficient to support the reheating of the air. Therefore, the supply air temperature is still not ideal.

[0005] Correspondingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0006] To solve at least one of the above problems in the prior art, that is, to solve the problem that the effect of increasing the supply air temperature by diverting the refrigerant discharged from the condenser to the reheating heat exchanger through a bypass pipeline during the dehumidification process is not ideal, the present application provides a heat pump air conditioner, including a compressor, an outdoor heat exchanger, an ejector, a gas-liquid separator, a first indoor heat exchanger, a second indoor heat exchanger, and a vortex tube.

[0007] The exhaust port of the compressor is communicated with the first port of the outdoor heat exchanger, the second port of the outdoor heat exchanger is communicated with the inlet of the ejector, the outlet of the ejector is communicated with the inlet of the gas-liquid separator, the exhaust port of the gas-liquid separator is communicated with the suction port of the compressor, the liquid discharge port of the gas-liquid separator is communicated with the inlet of the vortex tube, the hot end outlet of the vortex tube is communicated with the first port of the first indoor heat exchanger, the cold end outlet of the vortex tube is communicated with the first port of the second indoor heat exchanger, and the second indoor heat exchanger and the first indoor heat exchanger are arranged in sequence along the air outlet direction.

[0008] In the heat pump air conditioner of the present application, by using the cascade of the ejector and the vortex tube, the ejector can be used to create a prerequisite for the refrigerant to enter the vortex tube. On the one hand, the refrigerant with a lower temperature is discharged through the cold end outlet of the vortex tube to achieve the dehumidification of the indoor air. On the other hand, the heat of the refrigerant discharged through the hot end outlet of the vortex tube is used to reheat the dehumidified air, ultimately achieving dehumidification without temperature reduction, and the dehumidification effect can be guaranteed.

[0009] In the preferred technical solution of the above heat pump air conditioner, the second port of the first indoor heat exchanger is communicated with the entrainment port of the ejector or the inlet of the gas-liquid separator.

[0010] The above setting method can realize the recovery and recycling of the refrigerant in the first indoor heat exchanger, and improve the operation efficiency of the air conditioner.

[0011] In the preferred technical solution of the above heat pump air conditioner, the outlet of the ejector is also communicated with the second port of the first indoor heat exchanger, the first port of the first indoor heat exchanger is also communicated with the inlet of the gas-liquid separator, a first valve body is arranged on the pipeline between the outlet of the ejector and the inlet of the gas-liquid separator, a second valve body is arranged on the pipeline between the second port of the first indoor heat exchanger and the entrainment port of the ejector, a third valve body is arranged on the pipeline between the outlet of the ejector and the second port of the first indoor heat exchanger, one end of the third valve body is communicated between the outlet of the ejector and the first valve body, and the other end of the third valve body is communicated between the second port of the first indoor heat exchanger and the second valve body.

[0012] The above setting method can realize the efficient operation of refrigeration and dehumidification by switching between the valve bodies through the setting of the first valve body, the second valve body and the third valve body.

[0013] In the preferred technical solution of the above heat pump air conditioner, a fourth valve body is arranged on the pipeline between the hot end outlet of the vortex tube and the first port of the first indoor heat exchanger.

[0014] In the preferred technical solution of the above heat pump air conditioner, the second port of the second indoor heat exchanger is communicated with the entrainment port of the ejector or the inlet of the gas-liquid separator.

[0015] The above setting method can realize the recovery and recycling of the refrigerant in the second indoor heat exchanger, and improve the operation efficiency of the air conditioner.

[0016] In the preferred technical solution of the above heat pump air conditioner, a second throttling element is arranged on the pipeline between the second port of the second indoor heat exchanger and the entrainment port of the ejector, or

[0017] a second throttling element is arranged on the pipeline between the second port of the second indoor heat exchanger and the inlet of the gas-liquid separator.

[0018] The setting of the second throttling element can adjust the amount of refrigerant entering the second indoor heat exchanger, and further adjust the amount of refrigerant at the cold end outlet and the hot end outlet of the vortex tube, so as to realize the adjustment of the cooling and dehumidification amount and the reheating amount, which is beneficial to improving the effect of dehumidification without temperature reduction.

[0019] In the preferred technical solution of the above heat pump air conditioner, the liquid discharge port of the gas-liquid separator is further communicated with the first port of the second indoor heat exchanger, and a first throttling element is arranged on the pipeline between the liquid discharge port of the gas-liquid separator and the first port of the second indoor heat exchanger.

[0020] By communicating the liquid discharge port of the gas-liquid separator with the first port of the second indoor heat exchanger in the above setting method, the efficiency of the air conditioner in refrigeration operation can be improved.

[0021] In the preferred technical solution of the above heat pump air conditioner, the liquid discharge port of the gas-liquid separator, the inlet of the vortex tube, and the first port of the second indoor heat exchanger are respectively communicated with the three ports of an electronic control three-way valve, and the first throttling element is arranged on the pipeline between the electronic control three-way valve and the first port of the second indoor heat exchanger.

[0022] In the preferred technical solution of the above heat pump air conditioner, a fifth valve body is arranged on the pipeline between the cold end outlet of the vortex tube and the first port of the second indoor heat exchanger.

[0023] In the preferred technical solution of the above heat pump air conditioner, the heat pump air conditioner further includes a regenerator. The first port of the regenerator is communicated with the second port of the outdoor heat exchanger, the second port of the regenerator is communicated with the inlet of the ejector, the third port of the regenerator is communicated with the exhaust port of the gas-liquid separator, and the fourth port of the regenerator is communicated with the suction port of the compressor. A first heat exchange flow path is formed between the first port and the second port of the regenerator, and a second heat exchange flow path is formed between the third port and the fourth port of the regenerator; and / or

[0024] The heat pump air conditioner further includes a four-way valve. The four interfaces of the four-way valve are respectively communicated with the exhaust port of the compressor, the suction port of the compressor, the first port of the outdoor heat exchanger, and the exhaust port of the gas-liquid separator. The refrigerant of the heat pump air conditioner is carbon dioxide or a mixed refrigerant including carbon dioxide. Description of the Drawings

[0025] The present application will be described below with reference to the drawings in conjunction with a carbon dioxide heat pump air conditioner. In the drawings:

[0026] Figure 1 is the system diagram of the heat pump air conditioner of the present application;

[0027] Figure 2 is the flow chart of the heat pump system operating in the refrigeration mode of the present application;

[0028] Figure 3 is the flow chart of the heat pump system operating in the dehumidification mode of the present application;

[0029] Figure 4This is a flowchart of the heat pump system of the present application operating in the heating mode.

[0030] List of Reference Numerals

[0031] 1. Compressor; 2. Outdoor heat exchanger; 3. Ejector; 4. Gas-liquid separator; 5. First indoor heat exchanger; 6. Second indoor heat exchanger; 7. Vortex tube; 8. Four-way valve; 9. Regenerator; 10. First throttling element; 11. Second throttling element; 12. Third throttling element; 13. First valve body; 14. Second valve body; 15. Third valve body; 16. Fourth valve body; 17. Fifth valve body; 18. Sixth valve body; 19. Seventh valve body; 20. Eighth valve body; 21. Ninth valve body; 22. Tenth valve body; 23. Electrically controlled three-way valve. Detailed implementation manners

[0032] The preferred implementation manners of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application. For example, although this implementation manner is introduced in combination with a carbon dioxide heat pump air conditioner, this is not intended to limit the protection scope of the present application. Without departing from the principle of the present application, those skilled in the art can apply the present application to other application scenarios. For example, the present application can also be applied to other refrigerant air conditioning systems such as R134 and R32.

[0033] It should be noted that in the description of the present application, the terms indicating directions or positional relationships such as "upper", "lower", "left", and "right" are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", and "tenth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, "a plurality of" means at least two.

[0034] In addition, it should also be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "communicate" and "connect" 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 directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0035] First, refer to Figure 1 , and describe the carbon dioxide heat pump air conditioner of the present application.

[0036] As shown Figure 1 In order to solve the problem that the effect of improving the supply air temperature by diverting the refrigerant discharged from the condenser to the reheater through a bypass pipeline during the dehumidification process is not ideal, the carbon dioxide heat pump air conditioner of the present application includes a compressor 1, an outdoor heat exchanger 2, an ejector 3, a gas-liquid separator 4, a first indoor heat exchanger 5, a second indoor heat exchanger 6, and a vortex tube 7. The exhaust port of the compressor 1 is communicated with the first port of the outdoor heat exchanger 2, the second port of the outdoor heat exchanger 2 is communicated with the inlet of the ejector 3, the outlet of the ejector 3 is communicated with the inlet of the gas-liquid separator 4, the exhaust port of the gas-liquid separator 4 is communicated with the suction port of the compressor 1, the liquid discharge port of the gas-liquid separator 4 is communicated with the inlet of the vortex tube 7, the hot end outlet of the vortex tube 7 is communicated with the first port of the first indoor heat exchanger 5, the cold end outlet of the vortex tube 7 is communicated with the first port of the second indoor heat exchanger 6, and the second indoor heat exchanger 6 and the first indoor heat exchanger 5 are arranged in sequence along the air outlet direction.

[0037] In this way, during the dehumidification process, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 becomes a medium-temperature and medium-pressure gas-liquid mixed refrigerant after passing through the outdoor heat exchanger 2 and enters the ejector 3. The outlet of the ejector 3 injects the medium-temperature and medium-pressure enterprise mixed refrigerant into the gas-liquid separator 4. Among them, the gaseous refrigerant flows back to the compressor 1 from the exhaust port of the gas-liquid separator 4, and the liquid refrigerant enters the vortex tube 7 from the liquid discharge port of the gas-liquid separator 4. In the vortex tube 7, the liquid refrigerant is divided into two parts. After the two parts exchange heat, the high-temperature refrigerant is discharged from the hot end outlet to the first indoor heat exchanger 5, and the low-temperature refrigerant is discharged from the cold end outlet to the second indoor heat exchanger 6. The indoor air passes through the second indoor heat exchanger 6 and the first indoor heat exchanger 5 in sequence. When passing through the second indoor heat exchanger 6, it exchanges heat with the low-temperature refrigerant to condense the moisture in the air. When passing through the first indoor heat exchanger 5, it exchanges heat with the high-temperature refrigerant to increase the air temperature, and finally realizes non-cooling dehumidification of the air.

[0038] For the heat pump air conditioner of the present application, by using the ejector 3 and the vortex tube 7 in cascade, the ejector 3 can create a prerequisite for the refrigerant to enter the vortex tube 7. On the one hand, it enables the refrigerant with a lower temperature to be discharged from the cold end outlet of the vortex tube 7 to dehumidify the indoor air. On the other hand, the heat of the refrigerant discharged from the hot end outlet of the vortex tube 7 reheats the dehumidified air, and finally realizes non-cooling dehumidification, and the dehumidification effect can be guaranteed.

[0039] Next, with reference to Figures 1 to 4 , a preferred embodiment of the present application will be introduced.

[0040] As shown Figure 1 In a preferred embodiment, the carbon dioxide heat pump air conditioner includes a compressor 1, a four-way valve 8, an outdoor heat exchanger 2, a regenerator 9, an ejector 3, a gas-liquid separator 4, a first indoor heat exchanger 5, a second indoor heat exchanger 6, and a vortex tube 7.

[0041] The exhaust port of the compressor 1 is communicated with the first interface of the four-way valve 8, and the second interface of the four-way valve 8 is communicated with the first port of the outdoor heat exchanger 2 ( Figure 1 the right port in the middle), the second port of the outdoor heat exchanger 2 ( Figure 1 the left port in the middle) is communicated with the first port of the regenerator 9 ( Figure 1 the upper left port in the middle), the second port of the regenerator 9 ( Figure 1 the lower left port in the middle) is communicated with the inlet of the ejector 3, the outlet of the ejector 3 is communicated with the inlet of the gas-liquid separator 4, and the exhaust port of the gas-liquid separator 4 is communicated with the third port of the regenerator 9 ( Figure 1 the lower right port in the middle), the fourth port of the regenerator 9 ( Figure 1 the upper right port in the middle) is communicated with the third interface of the four-way valve 8, and the fourth interface of the four-way valve 8 is communicated with the suction port of the compressor 1. The liquid discharge port of the gas-liquid separator 4 is communicated with the inlet of the vortex tube 7, and the hot end outlet of the vortex tube 7 ( Figure 1 the upper port in the middle) is communicated with the first port of the first indoor heat exchanger 5 ( Figure 1 the right port in the middle), the cold end outlet of the vortex tube 7 ( Figure 1 the lower port in the middle) is communicated with the first port of the second indoor heat exchanger 6 ( Figure 1 the right port in the middle), the second port of the first indoor heat exchanger 5 ( Figure 1 the left port in the middle) and the second port of the second indoor heat exchanger 6 ( Figure 1 the left port in the middle) are both communicated with the injection port of the ejector 3.

[0042] Wherein, the second indoor heat exchanger 6 and the first indoor heat exchanger 5 are arranged in sequence along the air outlet direction. A first heat exchange flow path is formed between the first port and the second port of the regenerator 9, and a second heat exchange flow path is formed between the third port and the fourth port of the regenerator 9, and the second heat exchange flow path can exchange heat with the first heat exchange flow path.

[0043] Further, the outlet of the ejector 3 is also communicated with the second port of the first indoor heat exchanger 5, and the first port of the first indoor heat exchanger 5 is also communicated with the inlet of the gas-liquid separator 4. A first valve body 13 is provided on the pipeline between the outlet of the ejector 3 and the inlet of the gas-liquid separator 4, and a second valve body 14 is provided on the pipeline between the second port of the first indoor heat exchanger 5 and the injection port of the ejector 3. The first valve body 13 and the second valve body 14 are preferably solenoid valves. A third valve body 15 is provided on the pipeline between the outlet of the ejector 3 and the second port of the first indoor heat exchanger 5. One end of the third valve body 15 is communicated between the outlet of the ejector 3 and the first valve body 13, and the other end of the third valve body 15 is communicated between the second port of the first indoor heat exchanger 5 and the second valve body 14. The third valve body 15 is preferably a check valve, and the check valve is arranged to be conductive when the refrigerant flows from the outlet of the ejector 3 to the second port of the first indoor heat exchanger 5.

[0044] Further, the liquid discharge port of the gas-liquid separator 4 is also communicated with the first port of the second indoor heat exchanger 6, and a first throttling element 10 is provided on the pipeline between the liquid discharge port of the gas-liquid separator 4 and the first port of the second indoor heat exchanger 6. Preferably, the liquid discharge port of the gas-liquid separator 4, the inlet of the vortex tube 7, and the first port of the second indoor heat exchanger 6 are respectively communicated with the three ports of the electronic control three-way valve 23. The first throttling element 10 is preferably an electronic expansion valve, and it is provided on the pipeline between the electronic control three-way valve 23 and the first port of the second indoor heat exchanger 6.

[0045] Further, a fourth valve body 16 is provided on the pipeline between the hot end outlet of the vortex tube 7 and the first port of the first indoor heat exchanger 5, and a fifth valve body 17 is provided on the pipeline between the cold end outlet of the vortex tube 7 and the first port of the second indoor heat exchanger 6. One end of the fourth valve body 16 is communicated with the hot end outlet of the vortex tube 7, and the other end is communicated between the first port of the first indoor heat exchanger 5 and the inlet of the gas-liquid separator 4. One end of the fifth valve body 17 is communicated with the cold end outlet of the vortex tube 7, and the other end is communicated between the first port of the second indoor heat exchanger 6 and the first throttling element 10. Preferably, both the fourth valve body 16 and the fifth valve body 17 are check valves. The fourth valve body 16 is arranged to be conductive when the refrigerant flows from the hot end outlet of the vortex tube 7 to the first port of the first indoor heat exchanger 5, and the fifth valve body 17 is arranged to be conductive when the refrigerant flows from the cold end outlet of the vortex tube 7 to the first port of the second indoor heat exchanger 6.

[0046] Still referring to Figure 1, a second throttling element 11 is provided on the pipeline between the second port of the second indoor heat exchanger 6 and the ejector port of the ejector 3. The second port of the second indoor heat exchanger 6 is connected to the first port of the first indoor heat exchanger 5 through a pipeline, and a sixth valve body 18 is provided on this pipeline. One end of the sixth valve body 18 is connected between the second port of the second heat exchanger and the second throttling element 11, and the other end of the sixth valve body 18 is connected between the first port of the first heat exchanger and the fourth valve body 16. Preferably, the second throttling element 11 is an electronic expansion valve, and the sixth valve body 18 is a check valve, and the check valve is arranged to be conductive when the refrigerant flows from the second port of the second indoor heat exchanger 6 to the first port of the first indoor heat exchanger 5.

[0047] Further, a seventh valve body 19 is also provided on the pipeline between the second port of the regenerator 9 and the inlet of the ejector 3. The seventh valve body 19 is preferably a check valve, and the seventh valve body 19 is arranged to be conductive when the refrigerant flows from the second port of the regenerator 9 to the inlet of the ejector 3.

[0048] Further, the first port of the first indoor heat exchanger 5 is connected to the second port of the regenerator 9 through a pipeline, and an eighth valve body 20 and a third throttling element 12 are provided on this pipeline. One end of the eighth valve body 20 is connected between the second port of the first indoor heat exchanger 5 and the second valve body 14, and the other end is connected to the first port of the third throttling element 12. The second port of the third throttling element 12 is connected between the second port of the regenerator 9 and the seventh valve body 19. Preferably, the third throttling element 12 is an electronic expansion valve, and the eighth valve body 20 is a check valve, and the eighth valve body 20 is arranged to be conductive when the refrigerant flows from the first port of the first indoor heat exchanger 5 to the second port of the regenerator 9.

[0049] Further, a ninth valve body 21 is provided on the pipeline between the fourth port of the regenerator 9 and the third interface of the four-way valve 8. The ninth valve body 21 is preferably a check valve, and the ninth valve body 21 is arranged to be conductive when the refrigerant flows from the fourth port of the regenerator 9 to the third interface of the four-way valve 8.

[0050] Further, the third port and the fourth port of the regenerator 9 are connected through a pipeline, and a tenth valve body 22 is provided on this pipeline. One end of the tenth valve body 22 is connected between the ninth valve body 21 and the third interface of the four-way valve 8, and the other end is connected between the third port of the regenerator 9 and the exhaust port of the gas-liquid separator 4. The tenth valve body 22 is preferably a check valve, and the tenth valve body 22 is arranged to be conductive when the refrigerant flows from the third interface of the four-way valve 8 to the inlet of the gas-liquid separator 4.

[0051] Next, in conjunction with Figures 2 to 4 , the operation process of the heat pump air conditioner of the present application will be introduced.

[0052] As Figure 2As shown, when the heat pump air conditioner operates in the cooling mode, the first valve body 13, the second valve body 14, and the third throttling element 12 are closed, the second throttling element 11 is fully open, and the electronic control three-way valve 23 is switched to connect the liquid discharge port of the gas-liquid separator 4 with the first port of the second indoor heat exchanger 6. At this time, the compressor 1 compresses the refrigerant to high temperature and high pressure and then enters the outdoor heat exchanger 2 through the four-way valve 8. The refrigerant exchanges heat with the outdoor air in the outdoor heat exchanger 2 and then enters the regenerator 9. After the refrigerant exchanges heat with the low-temperature refrigerant gas flowing back in the regenerator 9, it enters the ejector 3 through the seventh valve body 19. After the high-pressure refrigerant enters the ejector 3 as the motive fluid and is ejected, a first pressure and a second pressure are respectively formed at the outlet and the entrainment port of the ejector 3, where the first pressure is higher than the second pressure. The refrigerant discharged from the outlet of the ejector 3 passes through the third valve body 15 and enters the first indoor heat exchanger 5 to exchange heat with the indoor air. The heat-exchanged refrigerant enters the gas-liquid separator 4. In the gas-liquid separator 4, the liquid refrigerant flows out from the liquid discharge port of the gas-liquid separator 4 after gas-liquid separation, passes through the three-way control valve, and after throttling, depressurizing, and cooling by the first throttling element 10, it enters the second indoor heat exchanger 6 to exchange heat with the indoor air and becomes a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant passes through the fully open second throttling element 11 and is then sucked into the ejector 3 from the entrainment port of the ejector 3, mixes with the refrigerant in the ejector 3, and then participates in the injection again. The gaseous refrigerant discharged from the exhaust port of the gas-liquid separator 4 further absorbs heat in the regenerator 9 and then flows back to the suction port of the compressor 1 through the ninth valve body 21 and the four-way valve 8 to complete the refrigeration cycle.

[0053] As Figure 3As shown, when the heat pump air conditioner operates in the dehumidification mode, the first valve body 13 and the second valve body 14 are opened, the first throttling element 10 and the third throttling element 12 are closed, and the electronic control three-way valve 23 is switched to connect the liquid discharge port of the gas-liquid separator 4 with the inlet of the vortex tube 7. At this time, the compressor 1 compresses the refrigerant to high temperature and high pressure and then enters the outdoor heat exchanger 2 through the four-way valve 8. The refrigerant exchanges heat with the outdoor air in the outdoor heat exchanger 2 and then enters the regenerator 9. After the refrigerant exchanges heat with the refluxing refrigerant gas in the regenerator 9, it enters the ejector 3 through the seventh valve body 19. After the high-pressure refrigerant enters the ejector 3 as the motive fluid and is ejected, a first pressure and a second pressure are respectively formed at the outlet and the entrainment port of the ejector 3, where the first pressure is higher than the second pressure. The refrigerant discharged from the outlet of the ejector 3 enters the gas-liquid separator 4 through the first valve body 13. In the gas-liquid separator 4, the liquid refrigerant flows out from the liquid discharge port of the gas-liquid separator 4 after gas-liquid separation, and enters the vortex chamber of the vortex tube 7 after passing through the electronic control three-way valve 23. The refrigerant entering the vortex chamber rotates at a high speed and flows towards the hot end outlet of the vortex tube 7. After the remaining refrigerant is blocked, it rotates in the opposite direction at the same speed within the original air flow inner circle and flows towards the cold end outlet of the vortex tube 7. During this process, heat exchange occurs between the two air flows. The temperature of the inner ring refrigerant drops and is discharged from the cold end outlet of the vortex tube 7, while the temperature of the outer ring air flow rises and is discharged from the hot end outlet of the vortex tube 7. The high-temperature refrigerant discharged through the hot end outlet enters the first indoor heat exchanger 5 after passing through the fourth valve body 16, and the low-temperature refrigerant discharged through the cold end outlet enters the second indoor heat exchanger 6 after passing through the fifth valve body 17. The indoor air first passes through the second indoor heat exchanger 6 and exchanges heat with the low-temperature refrigerant. During the heat exchange process, the air temperature drops and the moisture in the air condenses and precipitates. Then the air passes through the first indoor heat exchanger 5 and exchanges heat with the high-temperature refrigerant. During the heat exchange process, the air temperature rises. The refrigerant discharged from the first indoor heat exchanger 5 is inhaled into the ejector 3 through the entrainment port of the ejector 3 after passing through the second valve body 14. The refrigerant discharged from the second indoor heat exchanger 6 is inhaled into the ejector 3 through the entrainment port of the ejector 3 after passing through the second throttling element 11. The refrigerant entering through the entrainment port of the ejector 3 is mixed with the refrigerant in the ejector 3 and then participates in the injection again. The gaseous refrigerant discharged from the exhaust port of the gas-liquid separator 4 further absorbs heat through the regenerator 9 and then returns to the suction port of the compressor 1 through the ninth valve body 21 and the four-way valve to complete the dehumidification cycle. Among them, by controlling the opening degree of the second throttling element 11, the amount of refrigerant entering the second indoor heat exchanger 6 can be adjusted, and further the amount of refrigerant at the cold end outlet and the hot end outlet of the vortex tube 7 can be adjusted, so as to realize the adjustment of the cooling dehumidification amount and the reheating amount.

[0054] As Figure 4As shown, when the heat pump air conditioner operates in the heating mode, the four-way valve 8 changes its direction, the first valve body 13, the second valve body 14 and the second throttling element 11 are closed, and the first throttling element 10 is fully open. The electronic control three-way valve 23 is switched to connect the liquid discharge port of the gas-liquid separator 4 with the first port of the second indoor heat exchanger 6. At this time, the compressor 1 compresses the refrigerant into high-temperature and high-pressure, and enters the gas-liquid separator 4 through the four-way valve 8 and the tenth valve body 22 from the exhaust port of the gas-liquid separator 4. The high-temperature and high-pressure refrigerant gas flows out through the liquid discharge port of the gas-liquid separator 4, passes through the electronic control three-way valve 23 and the fully open first throttling element 10, and then enters the second indoor heat exchanger 6. The high-temperature and high-pressure refrigerant exchanges heat with the indoor air in the second indoor heat exchanger 6. The refrigerant after heat exchange enters the first indoor heat exchanger 5 through the sixth valve body 18 to further exchange heat with the indoor air and becomes low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant flows through the eighth valve body 20, is throttled, cooled, depressurized by the third throttling element 12, and then enters the outdoor heat exchanger 2 through the regenerator 9. The low-temperature and low-pressure refrigerant exchanges heat with the outdoor air in the outdoor heat exchanger 2 and then returns to the suction port of the compressor 1 through the four-way valve 8, completing the heating cycle.

[0055] In the above setting method, by cascading the ejector 3 and the vortex tube 7, the ejector 3 can create a prerequisite for the refrigerant to enter the vortex tube 7. On the one hand, it enables the refrigerant with a lower temperature to be discharged from the cold end outlet of the vortex tube 7 to dehumidify the indoor air. On the other hand, the heat of the refrigerant discharged from the hot end outlet of the vortex tube 7 is used to reheate the dehumidified air, ultimately achieving dehumidification without temperature reduction. Moreover, the setting of the second throttling element 11 enables the flow rates of the hot and cold ends of the vortex tube 7 to be adjusted, thereby adjusting the cooling and dehumidification amount and the reheating amount of the air, which is beneficial to improving the effect of dehumidification without temperature reduction. The second ports of the first indoor heat exchanger 5 and the second indoor heat exchanger 6 are simultaneously connected to the injection port of the ejector 3, which can realize the recovery and recycling of the refrigerant and improve the operating efficiency of the air conditioner. By setting the first valve body 13, the second valve body 14 and the third valve body 15, the efficient operation of refrigeration and dehumidification can be achieved through the switching between the valve bodies. By connecting the liquid discharge port of the gas-liquid separator 4 with the first port of the second indoor heat exchanger 6, the operating efficiency of the air conditioner in the refrigeration mode can be improved.

[0056] Those skilled in the art can understand that the above preferred embodiments are only used to illustrate the principle of the present application and are not intended to limit the protection scope of the present application. Without departing from the principle of the present application, those skilled in the art can adjust the above setting method so that the present application can be applied to more specific application scenarios.

[0057] For example, although the above-described embodiments are described in conjunction with the second port of the first indoor heat exchanger 5 and the second port of the second indoor heat exchanger 6 being simultaneously connected to the entrainment port of the ejector 3, this is merely a preferred technical solution, and those skilled in the art can adjust it. For example, one of the second ports of the first indoor heat exchanger 5 and the second port of the second indoor heat exchanger 6 can also be connected to the inlet of the gas-liquid separator 4, and the corresponding valve body can be arranged on the pipeline between the second port of the first indoor heat exchanger 5 or the second port of the second indoor heat exchanger 6 and the inlet of the gas-liquid separator 4.

[0058] Again, although the above-described embodiments are described in conjunction with the outlet of the ejector 3 being connected to the second port of the first indoor heat exchanger 5 and the first port of the first indoor heat exchanger 5 being connected to the inlet of the gas-liquid separator 4, this setting method is not necessary, and those skilled in the art can make a choice based on the specific application scenario. When the outlet of the ejector 3 is not connected to the second port of the first indoor heat exchanger 5 and the first port of the first indoor heat exchanger 5 is not connected to the inlet of the gas-liquid separator 4, the first valve body 13, the second valve body 14, and the third valve body 15 can be omitted accordingly. At the same time, in this case, in order to ensure the refrigeration effect, the refrigerant discharged from the hot end outlet of the vortex tube 7 can also be diverted to other positions, or a valve body can be added to adjust the amount of refrigerant entering the first indoor heat exchanger 5.

[0059] Again, although the above-described embodiments are introduced by taking the example that a fourth valve body 16 is arranged on the pipeline between the hot end outlet of the vortex tube 7 and the first port of the first indoor heat exchanger 5 and a fifth valve body 17 is arranged on the pipeline between the cold end outlet of the vortex tube 7 and the first port of the second indoor heat exchanger 6, the setting of the fourth valve body 16 and the fifth valve body 17 is not necessary, and those skilled in the art can make a choice based on the specific application scenario.

[0060] Again, although the liquid discharge port of the gas-liquid separator 4 is described by taking the example of being connected to the first port of the second indoor heat exchanger 6 and the liquid discharge port of the gas-liquid separator 4, the inlet of the vortex tube 7, and the first port of the second indoor heat exchanger 6 being connected through the electric control three-way valve 23, this is merely exemplary, and those skilled in the art can adjust it. For example, the liquid discharge port of the gas-liquid separator 4 can also not be connected to the first port of the second indoor heat exchanger 6, and in this case, the first throttling element 10 can be omitted. Again, the liquid discharge port of the gas-liquid separator 4 can also be connected to the inlet of the vortex tube 7 and the second indoor heat exchanger 6 respectively through pipelines. Again, the electric control three-way valve 23 can also be replaced by multiple solenoid valves, etc.

[0061] For another example, although the heat pump air conditioner described above is provided with a recuperator 9 and a four-way valve 8, the provision of the two is not essential, and those skilled in the art can make a choice based on specific requirements. For example, the provision of the recuperator 9 can be omitted, and at the same time, the ninth valve body 21 and the tenth valve body 22 can be omitted accordingly. For another example, the four-way valve 8 can also be not provided, and in this case, the heat pump air conditioner will become a single-cooling air conditioner.

[0062] For another example, in the above-described embodiment, the connection between the second port of the second indoor heat exchanger 6 and the first port of the first indoor heat exchanger 5 through a pipeline, and the connection between the second port of the first indoor heat exchanger 5 and the second port of the recuperator 9 through a pipeline are both preferred embodiments. Those skilled in the art can choose whether to provide the above two pipelines based on the specific application scenario. When the above two pipelines are not provided, the valve bodies related to the two pipelines (such as the sixth valve body 18, the seventh valve body 19, the eighth valve body 20, and the third throttling element 12, etc.) can be omitted.

[0063] For another example, the specific forms of the above first valve body 13, second valve body 14... tenth valve body 22 are not restrictive. On the premise that the corresponding functions can be achieved, those skilled in the art can replace one or more of the above valve bodies. For example, the solenoid valve can be replaced by other valve bodies with adjustable opening and closing, such as electric ball valves, electric butterfly valves, etc., and the one-way valve can be replaced by a solenoid valve, etc.

[0064] For another example, in addition to the electronic expansion valve, the above first throttling element 10, second throttling element 11, and third throttling element 12 can also be other throttling valves with opening adjustment functions.

[0065] For another example, in the above-described embodiment, the description is made in combination with the provision of the second throttling element 11, but the provision of the second throttling element 11 is not essential. Those skilled in the art can omit the second throttling element 11. Of course, after omission, the flow rates of the cold end outlet and the hot end outlet of the vortex tube 7 cannot be adjusted. In addition, the installation position of the second throttling element 11 can also be set on the cold end outlet or the hot end outlet pipeline of the vortex tube 7, which can not only achieve the flow control of the cold end outlet or the hot end outlet, but also omit the fourth valve body 16 or the fifth valve body 17 on this pipeline.

[0066] Those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims of the present application, any one of the claimed embodiments can be used in any combination.

[0067] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A heat pump air conditioner, characterized in that, It includes a compressor, an outdoor heat exchanger, an ejector, a gas-liquid separator, a first indoor heat exchanger, a second indoor heat exchanger, and a vortex tube. The exhaust port of the compressor is communicated with the first port of the outdoor heat exchanger, the second port of the outdoor heat exchanger is communicated with the inlet of the ejector, the outlet of the ejector is communicated with the inlet of the gas-liquid separator, the exhaust port of the gas-liquid separator is communicated with the suction port of the compressor, the liquid discharge port of the gas-liquid separator is communicated with the inlet of the vortex tube, the hot end outlet of the vortex tube is communicated with the first port of the first indoor heat exchanger, the cold end outlet of the vortex tube is communicated with the first port of the second indoor heat exchanger, and the second indoor heat exchanger and the first indoor heat exchanger are arranged in sequence along the air outlet direction.

2. The heat pump air conditioner according to claim 1, characterized in that, The second port of the first indoor heat exchanger is communicated with the injection port of the ejector or the inlet of the gas-liquid separator.

3. The heat pump air conditioner according to claim 2, characterized in that, The outlet of the ejector is further communicated with the second port of the first indoor heat exchanger, the first port of the first indoor heat exchanger is further communicated with the inlet of the gas-liquid separator, a first valve body is arranged on the pipeline between the outlet of the ejector and the inlet of the gas-liquid separator, a second valve body is arranged on the pipeline between the second port of the first indoor heat exchanger and the injection port of the ejector, a third valve body is arranged on the pipeline between the outlet of the ejector and the second port of the first indoor heat exchanger, one end of the third valve body is communicated between the outlet of the ejector and the first valve body, and the other end of the third valve body is communicated between the second port of the first indoor heat exchanger and the second valve body.

4. The heat pump air conditioner according to claim 3, wherein A fourth valve body is arranged on the pipeline between the hot end outlet of the vortex tube and the first port of the first indoor heat exchanger.

5. The heat pump air conditioner according to claim 1, characterized in that The second port of the second indoor heat exchanger is communicated with the injection port of the ejector or the inlet of the gas-liquid separator.

6. The heat pump air conditioner according to claim 5, wherein A second throttling element is arranged on the pipeline between the second port of the second indoor heat exchanger and the injection port of the ejector, or A second throttling element is arranged on the pipeline between the second port of the second indoor heat exchanger and the inlet of the gas-liquid separator.

7. The heat pump air conditioner according to claim 1, characterized in that The liquid discharge port of the gas-liquid separator is further communicated with the first port of the second indoor heat exchanger, and a first throttling element is arranged on the pipeline between the liquid discharge port of the gas-liquid separator and the first port of the second indoor heat exchanger.

8. The heat pump air conditioner according to claim 7, characterized in that, The liquid discharge port of the gas-liquid separator, the inlet of the vortex tube, and the first port of the second indoor heat exchanger are respectively communicated with the three ports of an electric control three-way valve, and the first throttling element is arranged on the pipeline between the electric control three-way valve and the first port of the second indoor heat exchanger.

9. The heat pump air conditioner according to claim 7, wherein A fifth valve body is arranged on the pipeline between the cold end outlet of the vortex tube and the first port of the second indoor heat exchanger.

10. The heat pump air conditioner according to claim 1, characterized in that, The heat pump air conditioner further includes a recuperator. A first port of the recuperator is communicated with a second port of the outdoor heat exchanger. A second port of the recuperator is communicated with an inlet of the ejector. A third port of the recuperator is communicated with an exhaust port of the gas-liquid separator. A fourth port of the recuperator is communicated with a suction port of the compressor. A first heat exchange flow path is formed between the first port and the second port of the recuperator. A second heat exchange flow path is formed between the third port and the fourth port of the recuperator; and / or The heat pump air conditioner further includes a four-way valve. Four interfaces of the four-way valve are respectively communicated with an exhaust port of the compressor, a suction port of the compressor, a first port of the outdoor heat exchanger, and an exhaust port of the gas-liquid separator; and / or The refrigerant of the heat pump air conditioner is carbon dioxide or a mixed refrigerant including carbon dioxide.

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