An air conditioning system

Abstract

The application discloses an air conditioning system, comprising an outdoor heat exchanger, an indoor heat exchanger, a compressor, a liquid storage tank and a heat exchange pipe, the heat exchange pipe is arranged on the liquid storage tank, the compressor, the outdoor heat exchanger, the heat exchange pipe, the indoor heat exchanger and the liquid storage tank are sequentially connected, and the liquid storage tank is further connected with the compressor. The heat exchange pipe is arranged on the liquid storage tank, and the heat exchange pipe is arranged between the outdoor heat exchanger and the indoor heat exchanger, so that the heat exchange pipe can further supercool the refrigerant at the outlet of the outdoor heat exchanger by using the cold quantity of the surface of the liquid storage tank, the further supercooling of the refrigerant reduces the enthalpy and dryness at the inlet of the indoor heat exchanger, improves the heat exchange efficiency and refrigerating capacity, and further improves the refrigeration effect of the air conditioning system.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to an air conditioning system. Background Technology

[0002] In existing air conditioning systems, the heat transfer performance of the outdoor heat exchanger decreases significantly during high-temperature cooling, leading to an increase in the outlet temperature of the outdoor heat exchanger. This phenomenon is mainly due to the high outdoor ambient temperature, which raises the temperature of the heat transfer medium in the outdoor heat exchanger, thereby reducing the heat transfer efficiency.

[0003] Furthermore, an increase in the outdoor heat exchanger outlet temperature will also lead to an increase in the indoor heat exchanger inlet temperature and dryness. This increase in inlet temperature and dryness will cause a decrease in the indoor heat exchanger's heat exchange performance, thus significantly reducing the cooling effect. Summary of the Invention

[0004] The purpose of this invention is to provide an air conditioning system that addresses the problems of poor cooling performance in existing air conditioning systems.

[0005] This invention provides an air conditioning system, including: an outdoor heat exchanger, an indoor heat exchanger, a compressor, a liquid storage tank, and a heat exchange tube. The heat exchange tube is disposed on the liquid storage tank. The compressor, the outdoor heat exchanger, the heat exchange tube, the indoor heat exchanger, and the liquid storage tank are connected in sequence. The liquid storage tank is also connected to the compressor.

[0006] Furthermore, it also includes a first regulating valve and a vortex tube. The first regulating valve includes a first connecting end, a second connecting end, a third connecting end, and a fourth connecting end. The vortex tube includes a vortex inlet, a cold end outlet, and a hot end outlet.

[0007] In cooling mode, the compressor outlet is connected to the first connection end, the first connection end is connected to the second connection end, the second connection end is connected to the outdoor heat exchanger, the third connection end is connected to the liquid inlet of the liquid storage tank, the fourth connection end is connected to the third connection end, and the fourth connection end is connected to the indoor heat exchanger.

[0008] In defrosting mode, the compressor outlet is connected to the first connection end, the first connection end is connected to the fourth connection end, the fourth connection end is connected to the indoor heat exchanger and the vortex inlet respectively, the second connection end is connected to the outdoor heat exchanger, the second connection end is connected to the third connection end, the third connection end is connected to the liquid inlet of the liquid storage tank, the cold end outlet is connected to the heat exchange inlet located on the heat exchange tube, and the hot end outlet is connected to the outdoor heat exchanger.

[0009] Furthermore, it also includes an indoor auxiliary heat exchanger, with the hot end outlet connected to one end of the indoor auxiliary heat exchanger and the other end of the indoor auxiliary heat exchanger connected to the outdoor heat exchanger.

[0010] In heating mode, the compressor outlet is connected to the first connection end, the first connection end is connected to the fourth connection end, the fourth connection end is connected to the indoor heat exchanger and the vortex inlet, the second connection end is connected to the outdoor heat exchanger, the second connection end is connected to the third connection end, the third connection end is connected to the liquid inlet of the liquid storage tank, the cold end outlet is connected to the heat exchange inlet located on the heat exchange tube, and the hot end outlet is connected to the indoor auxiliary heat exchanger.

[0011] Furthermore, it also includes a second regulating valve, which includes a fifth connecting end and a sixth connecting end;

[0012] In heating mode and defrosting mode, the fifth connection end and the sixth connection end are connected. The fifth connection end is connected to the heat exchange outlet of the heat exchange tube, and the sixth connection end is connected to the outdoor heat exchanger.

[0013] Furthermore, the second regulating valve also includes a seventh connection end and an eighth connection end;

[0014] In cooling mode, the fifth and eighth connection terminals are connected, the sixth and seventh connection terminals are connected, the fifth connection terminal is connected to the heat exchange outlet of the heat exchange tube, the seventh connection terminal is connected to the heat exchange inlet of the heat exchange tube, the sixth connection terminal is connected to the outdoor heat exchanger, and the eighth connection terminal is connected to the indoor heat exchanger.

[0015] Furthermore, it also includes an electronic expansion valve and a first control valve. The electronic expansion valve is connected between the outdoor heat exchanger and the indoor heat exchanger. One end of the first control valve is connected to the hot end outlet, and the other end of the first control valve is connected to the indoor auxiliary heat exchanger. Alternatively, the other end of the first control valve can be connected between the outdoor heat exchanger and the electronic expansion valve.

[0016] Furthermore, there are two of the first control valves;

[0017] One end of one of the first control valves is connected to the hot end outlet, and the other end is connected between the outdoor heat exchanger and the electronic expansion valve;

[0018] Another first control valve has one end connected to the hot end outlet and the other end connected to one end of the indoor auxiliary heat exchanger. The other end of the indoor auxiliary heat exchanger is connected between the outdoor heat exchanger and the electronic expansion valve.

[0019] Furthermore, it also includes a second control valve, one end of which is connected to the fourth connection end, and the other end of which is connected to the vortex inlet.

[0020] Furthermore, it also includes a first check valve, the inlet of which is connected to an electronic expansion valve, and the outlet of which is connected to an outdoor heat exchanger.

[0021] Furthermore, it also includes a second check valve, the inlet of which is connected to the eighth connection terminal, and the outlet of which is connected between the first check valve and the electronic expansion valve.

[0022] Furthermore, it also includes a third one-way valve, the inlet of which is connected to the seventh connection end, and the outlet of which is connected to the heat exchange inlet of the heat exchange tube.

[0023] Furthermore, it also includes a fourth one-way valve, the inlet of which is connected to the cold end outlet, and the outlet of which is connected between the third one-way valve and the heat exchange inlet of the heat exchange tube.

[0024] Furthermore, it also includes a fifth one-way valve, the inlet of which is connected to the indoor auxiliary heat exchanger, and the outlet of which is connected between the first one-way valve and the electronic expansion valve.

[0025] This invention discloses an air conditioning system, comprising: an outdoor heat exchanger, an indoor heat exchanger, a compressor, a liquid receiver, and heat exchange tubes. The heat exchange tubes are disposed on the liquid receiver. The compressor, outdoor heat exchanger, heat exchange tubes, indoor heat exchanger, and liquid receiver are connected sequentially, and the liquid receiver is also connected to the compressor. By placing the heat exchange tubes on the liquid receiver and between the outdoor and indoor heat exchangers, this invention allows the heat exchange tubes to utilize the cooling energy from the surface of the liquid receiver to further subcool the refrigerant at the outlet of the outdoor heat exchanger. This further subcooling of the refrigerant reduces the enthalpy and dryness at the inlet of the indoor heat exchanger, improving heat exchange efficiency and cooling capacity, thereby enhancing the cooling effect of the air conditioning system. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the air conditioning system in this embodiment;

[0028] Figure 2 This is a schematic diagram of the air conditioning system in cooling mode according to this embodiment;

[0029] Figure 3 This is a schematic diagram of the air conditioning system in defrost mode according to this embodiment;

[0030] Figure 4 This is a schematic diagram of the air conditioning system in heating mode according to this embodiment;

[0031] Figure 5 This is a schematic diagram of the vortex tube structure in this embodiment;

[0032] Figure 6 This is a cross-sectional schematic diagram of the vortex tube in this embodiment from a first perspective;

[0033] Figure 7 This is a cross-sectional schematic diagram of the vortex tube in this embodiment from a second perspective;

[0034] Figure 8 This is a flowchart of the control method for the air conditioning system in this embodiment;

[0035] Explanation of markings in the diagram:

[0036] 1. Outdoor heat exchanger; 2. Indoor heat exchanger; 3. Compressor; 4. Liquid receiver; 5. Heat exchange tube; 6. First regulating valve; 61. First connection end; 62. Second connection end; 63. Third connection end; 64. Fourth connection end; 7. Vortex tube; 71. Vortex inlet; 72. Cold end outlet; 73. Hot end outlet; 74. Vortex chamber; 75. Hot end regulating valve; 8. Indoor auxiliary heat exchanger; 9. Second regulating valve; 91. Fifth connection end; 92. Sixth connection end; 93. Seventh connection end; 94. Eighth connection end; 10. Electronic expansion valve; 11. Defrosting control valve; 12. Heating control valve; 13. Second control valve; 14. First check valve; 15. Second check valve; 16. Third check valve; 17. Fourth check valve; 18. Fifth check valve. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0039] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0040] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0041] Please see Figure 1 The present invention provides an air conditioning system, comprising: an outdoor heat exchanger 1, an indoor heat exchanger 2, a compressor 3, a liquid storage tank 4, and a heat exchange pipe 5. The heat exchange pipe 5 is disposed on the liquid storage tank 4. The compressor 3, the outdoor heat exchanger 1, the heat exchange pipe 5, the indoor heat exchanger 2, and the liquid storage tank 4 are connected in sequence. The liquid storage tank 4 is also connected to the compressor 3.

[0042] The cooling mode process is as follows: the high-temperature refrigerant discharged from the compressor 3 enters the outdoor heat exchanger 1 to cool and condense, then enters the heat exchange tube 5, and exchanges heat with the low-temperature refrigerant in the liquid tank 4 before entering the indoor heat exchanger 2 to evaporate. The refrigerant at the outlet of the indoor heat exchanger 2 enters the liquid tank 4, and finally enters the suction port of the compressor 3, and so on.

[0043] In this embodiment, by placing the heat exchange tube 5 on the liquid storage tank 4 and between the outdoor heat exchanger 1 and the indoor heat exchanger 2, the heat exchange tube 5 can utilize the coldness of the surface of the liquid storage tank 4 to further subcool the refrigerant at the outlet of the outdoor heat exchanger 1. The further subcooling of the refrigerant reduces the enthalpy and dryness of the inlet of the indoor heat exchanger 2, improves the heat exchange efficiency and cooling capacity, and thus improves the cooling effect of the air conditioning system.

[0044] In this embodiment, the heat exchange tube 5 can be disposed on the outer surface of the liquid storage tank 4 or inside the liquid storage tank 4. When the heat exchange tube 5 is disposed on the outer surface of the liquid storage tank 4, the outer surface of the heat exchange tube 5 can serve as an anti-corrosion layer, thereby extending the service life of the liquid storage tank 4. When the heat exchange tube 5 is disposed inside the liquid storage tank 4, the impact of external corrosion and pollution can be reduced. In the structure where the heat exchange tube 5 is disposed inside the liquid storage tank 4, the temperature difference between the refrigerant inside the heat exchange tube 5 and the refrigerant inside the liquid storage tank 4 is greater than that in the structure where the heat exchange tube 5 is disposed on the outer surface of the liquid storage tank 4. Consequently, the heat exchange effect is better, the temperature of the refrigerant entering the indoor heat exchanger 2 is lower, the enthalpy and dryness of the inlet of the indoor heat exchanger 2 are lower, the heat exchange efficiency is better, the cooling capacity is greater, and the cooling effect of the air conditioning system is better.

[0045] In this embodiment, please refer to Figure 2 and Figure 3 It also includes a first regulating valve 6 and a vortex tube 7. The first regulating valve 6 includes a first connecting end 61, a second connecting end 62, a third connecting end 63 and a fourth connecting end 64. The vortex tube 7 includes a vortex inlet 71, a cold end outlet 72 and a hot end outlet 73.

[0046] In cooling mode, the compression outlet of compressor 3 is connected to the first connection end 61, the first connection end 61 is connected to the second connection end 62, the second connection end 62 is connected to the outdoor heat exchanger 1, the third connection end 63 is connected to the liquid inlet of liquid storage tank 4, and the fourth connection end 64 is connected to the third connection end 63 and the indoor heat exchanger 2.

[0047] In defrosting mode, the compressor outlet of compressor 3 is connected to the first connection end 61, the first connection end 61 is connected to the fourth connection end 64, the fourth connection end 64 is connected to the indoor heat exchanger 2 and the vortex inlet 71 respectively, the second connection end 62 is connected to the outdoor heat exchanger 1, the second connection end 62 is connected to the third connection end 63, the third connection end 63 is connected to the liquid inlet of liquid storage tank 4, the cold end outlet 72 is connected to the heat exchange inlet located in heat exchange tube 5, and the hot end outlet 73 is connected to the outdoor heat exchanger 1.

[0048] When refrigeration is required, the high-temperature refrigerant from the compressor 3 outlet passes through the first connection end 61 and the second connection end 62 and enters the outdoor heat exchanger 1 for cooling and condensation. Then, the high-temperature refrigerant passes through the heat exchange tube 5 and exchanges heat with the low-temperature refrigerant in the liquid storage tank 4 before entering the indoor heat exchanger 2 for evaporation. The refrigerant from the outlet of the indoor heat exchanger 2 enters the liquid storage tank 4 and finally enters the suction port of the compressor 3, thus repeating the cycle.

[0049] In this embodiment, after the high-temperature refrigerant in the heat exchange tube 5 exchanges heat with the low-temperature refrigerant in the liquid storage tank 4, the temperature of the high-temperature refrigerant flowing from the heat exchange tube 5 to the indoor heat exchanger 2 is further reduced. The reduction in the temperature of the refrigerant entering the indoor heat exchanger 2 reduces the enthalpy and dryness at the inlet of the indoor heat exchanger 2, improves the heat exchange efficiency and cooling capacity, and thus improves the cooling effect of the air conditioning system.

[0050] When defrosting is required, the high-temperature refrigerant at the compressor 3 outlet passes through the first connection end 61 and the fourth connection end 64. Then, a portion of the high-temperature refrigerant discharged from the fourth connection end 64 enters the indoor heat exchanger 2, condensing and releasing heat to continuously provide some heat to the room. The refrigerant at the outlet of the indoor heat exchanger 2 then enters the outdoor heat exchanger 1 to evaporate and absorb heat. The other portion of the high-temperature refrigerant enters the vortex tube 7 through the vortex inlet 71. The high-temperature refrigerant entering the vortex tube 7 experiences a pressure reduction and heat separation within the vortex tube 7. The refrigerant separated at the hot end outlet 73 of the vortex tube 7 is at a temperature lower than that of the high-temperature refrigerant. The hotter refrigerant enters the outdoor heat exchanger 1 to defrost it. The colder refrigerant, which is cooler than the high-temperature refrigerant, separates at the cold end outlet 72 of the vortex tube 7 and enters the heat exchange tube 5 to heat the low-temperature refrigerant in the liquid receiver 4, thereby raising the suction temperature of the compressor 3 and preventing liquid slugging in the compressor 3. The refrigerant at the heat exchange outlet of the heat exchange tube 5 enters the outdoor heat exchanger 1 for further defrosting or evaporation. Then, the refrigerant at the outlet of the outdoor heat exchanger 1 enters the suction port of the compressor 3 through the liquid receiver 4, and so on.

[0051] In this embodiment, the hot-end refrigerant, which is hotter than the high-temperature refrigerant, is separated by the vortex tube 7 and enters the outdoor heat exchanger 1 for defrosting. This helps to accelerate the defrosting speed and shorten the defrosting time. Simultaneously, the cold-end refrigerant, which is colder than the high-temperature refrigerant, at the cold-end outlet 72 of the vortex tube 7 exchanges heat with the low-temperature refrigerant at the outlet of the outdoor heat exchanger 1 within the heat exchange tube 5. This heats the refrigerant in the liquid receiver 4, reducing liquid accumulation and increasing the suction temperature entering the compressor 3, thus preventing liquid slugging in the compressor 3. Furthermore, the vortex tube 7 has a pressure-reducing effect. Compared to the traditional method of directly using a portion of the high-pressure compressor 3's exhaust gas into the outdoor heat exchanger 1 for defrosting, the system pressure in this embodiment is lower. This helps to reduce the suction saturation temperature, increase the superheat at the bottom of the compressor 3, and reduce liquid accumulation in the liquid receiver 4.

[0052] In this embodiment, please refer to Figure 4 It also includes an indoor auxiliary heat exchanger 8, with a hot end outlet 73 connected to one end of the indoor auxiliary heat exchanger 8 and the other end of the indoor auxiliary heat exchanger 8 connected to the outdoor heat exchanger 1.

[0053] In heating mode, the compression outlet of compressor 3 is connected to the first connection end 61, the first connection end 61 is connected to the fourth connection end 64, the fourth connection end 64 is connected to the indoor heat exchanger 2 and the vortex inlet 71 respectively, the second connection end 62 is connected to the outdoor heat exchanger 1, the second connection end 62 is connected to the third connection end 63, the third connection end 63 is connected to the liquid inlet of liquid storage tank 4, the cold end outlet 72 is connected to the heat exchange inlet located in heat exchange tube 5, and the hot end outlet 73 is connected to the indoor auxiliary heat exchanger 8.

[0054] When the air conditioning system is in heating mode, the high-temperature refrigerant from the compressor 3 outlet passes through the first connection end 61 and the fourth connection end 64. Then, part of the high-temperature refrigerant discharged from the fourth connection end 64 directly enters the indoor heat exchanger 2 to condense and release heat; the other part of the high-temperature refrigerant enters the vortex tube 7 through the vortex inlet 71 to reduce pressure and undergo hot-cold separation. The pressure at the hot end outlet 73 and the cold end outlet 72 of the vortex tube 7 is close to the pressure after throttling by the electronic expansion valve 10. At the hot end outlet 73 of the vortex tube 7, a hot-end refrigerant with a temperature higher than that of the high-temperature refrigerant is separated, and at the cold end outlet 72 of the vortex tube 7, a cold-end refrigerant with a temperature lower than that of the high-temperature refrigerant is separated. The hot-end refrigerant at the hot-end outlet 73 of the vortex tube 7 enters the indoor auxiliary heat exchanger 8, where it condenses and releases heat to rapidly heat the indoor air. The refrigerant at the outlet of the indoor auxiliary heat exchanger 8 then enters the outdoor heat exchanger 1 to evaporate and absorb heat. The cold-end refrigerant at the cold-end outlet 72 of the vortex tube 7 enters the heat exchange tube 5 and exchanges heat with the low-temperature refrigerant in the liquid receiver 4, before entering the outdoor heat exchanger 1. The refrigerant at the outlet of the outdoor heat exchanger 1 flows through the liquid receiver 4 and finally enters the suction port of the compressor 3, thus completing the cycle.

[0055] In this embodiment, the hot-end refrigerant at the hot-end outlet 73 of the vortex tube 7 enters the indoor auxiliary heat exchanger 8, which can quickly heat the indoor air, thus improving the outlet air temperature and shortening the anti-cold air time. The cold-end refrigerant at the cold-end outlet 72 of the vortex tube 7 enters the heat exchange tube 5 and exchanges heat with the low-temperature refrigerant inside the liquid storage tank 4 through wall heat transfer, thereby increasing the suction temperature of the compressor 3. By heating and evaporating the liquid in the liquid storage tank 4, liquid slugging of the compressor 3 can be effectively prevented. At the same time, the suction pressure and discharge temperature of the compressor 3 can also be increased, thus improving the heating capacity.

[0056] Please refer to Figure 5-7The vortex tube 7 mainly includes a vortex inlet 71, a vortex chamber 74, a cold end outlet 72, a hot end outlet 73, and a hot end regulating valve 75. A high-pressure working fluid at temperature T1 enters tangentially through the inlet nozzle of the vortex tube 7, experiencing pressure reduction and acceleration. Within the vortex chamber 74, it undergoes high-speed circular motion, generating free vortices. Due to the difference in angular velocities between the inner and outer layers of the airflow, energy exchange and rapid hot-cold separation occur within the hot end tube. The inner layer of airflow decreases in angular velocity, loses energy, and its temperature decreases. Under the obstruction of the hot end regulating valve 75, it changes its flow direction and flows out through the cold end outlet 72, where the temperature is T2. Meanwhile, the outer layer of airflow gains energy, its angular velocity increases, and its temperature increases, flowing out through the hot end outlet 73, where the temperature is T3. The inlet and outlet temperatures of the vortex tube 7 satisfy T3 > T1 > T2. By adjusting the opening of the hot end regulating valve 75, the airflow temperature and flow rate at the cold end outlet 72 and the hot end outlet 73 of the vortex tube 7 can be controlled.

[0057] In this embodiment, the cold flow rate u of the vortex tube 7 is defined as the ratio of the mass flow rate at the cold end outlet 72 to the mass flow rate at the inlet of the vortex tube 7. The gas undergoes approximately isentropic expansion within the vortex tube 7. Assuming the gas is an ideal gas, the following relationship is satisfied between the cold flow rate and the inlet and outlet temperatures:

[0058] u = (T3 - T1) / (T3 - T2)

[0059] In a specific application scenario, during heating mode, due to varying ambient temperatures, the discharge temperature of compressor 3 is approximately between 70 and 100°C, while the suction temperature is approximately between -20 and -4°C. Assuming the discharge temperature of compressor 3 is 80°C, due to the heat separation effect of the vortex tube 7, the hot end outlet 73 temperature is 100°C, and the cold flow rate is 0.5. According to the cold flow rate calculation formula, the cold end outlet 72 temperature of the vortex tube 7 is 60°C. This 60°C is significantly higher than the suction temperature of compressor 3 (-20 to -4°C). Therefore, the refrigerant from compressor 3 can be delivered to the vortex tube 7, and the refrigerant from the cold end outlet 72 of the vortex tube 7 can be discharged into the heat exchange tube 5 to heat the liquid receiver 4.

[0060] In this embodiment, please refer to Figure 2-4 It also includes a second regulating valve 9, which includes a fifth connecting end 91 and a sixth connecting end 92;

[0061] In heating mode and defrosting mode, the fifth connection terminal 91 and the sixth connection terminal 92 are connected. The fifth connection terminal 91 is connected to the heat exchange outlet of the heat exchange tube 5, and the sixth connection terminal 92 is connected to the outdoor heat exchanger 1.

[0062] The second regulating valve 9 also includes a seventh connection end 93 and an eighth connection end 94;

[0063] In cooling mode, the fifth connection terminal 91 and the eighth connection terminal 94 are connected, the sixth connection terminal 92 and the seventh connection terminal 93 are connected, the fifth connection terminal 91 is connected to the heat exchange outlet of the heat exchange tube 5, the seventh connection terminal 93 is connected to the heat exchange inlet of the heat exchange tube 5, the sixth connection terminal 92 is connected to the outdoor heat exchanger 1, and the eighth connection terminal 94 is connected to the indoor heat exchanger 2.

[0064] The second regulating valve 9 effectively simplifies the structure of the entire air conditioning system. For example, in the previous structure, when heating, the outdoor heat exchanger 1 and heat exchange tube 5 needed to be connected through a single pipe, while when cooling, the outdoor heat exchanger 1 and heat exchange tube 5 needed to be connected through a single pipe, and the indoor heat exchanger 2 and heat exchange tube 5 also needed to be connected through a single pipe. Thus, in both heating and cooling, the outdoor heat exchanger 1 and heat exchange tube 5 needed to be connected through a single pipe. However, the second regulating valve 9 allows the air conditioning system to continuously switch between cooling and heating modes. Therefore, it only needs to be connected through a single pipe, eliminating the need for other configurations, reducing the design difficulty of pipework, and making the entire air conditioning system structure simpler and more efficient.

[0065] In this embodiment, both the first regulating valve 6 and the second regulating valve 9 have four connection ends, and the connection ends of the first regulating valve 6 and the second regulating valve 9 are connected in pairs to achieve bidirectional flow. Therefore, the first regulating valve 6 and the second regulating valve 9 can be four-way valves.

[0066] In this embodiment, an electronic expansion valve 10 and a first control valve are also included. The electronic expansion valve 10 is connected between the outdoor heat exchanger 1 and the indoor heat exchanger 2. One end of the first control valve is connected to the hot end outlet 73, and the other end of the first control valve is connected to the indoor auxiliary heat exchanger 8, or the other end of the first control valve is connected between the outdoor heat exchanger 1 and the electronic expansion valve 10.

[0067] The first control valve is mainly used to control the inflow direction of the hot-end refrigerant flowing out of the hot-end outlet 73, thereby realizing the switching between heating mode and defrosting mode. When the air conditioning system is in heating mode, the first control valve is connected to and opened by the indoor auxiliary heat exchanger 8, so that the hot-end refrigerant flows into the indoor auxiliary heat exchanger 8 to quickly raise the indoor temperature. When the air conditioning system is in defrosting mode, the first control valve is connected to and opened by the outdoor heat exchanger 1, so that the hot-end refrigerant flows into the outdoor heat exchanger 1 to defrost the outdoor heat exchanger 1. At the same time, the first control valve can effectively control the flow rate of refrigerant, thereby providing a better air conditioning experience and adaptability.

[0068] The first control valve can be connected to the indoor auxiliary heat exchanger 8 and the outdoor heat exchanger 1 via a three-way valve, and can also switch between the heating mode and the defrosting mode of the air conditioning system; alternatively, two first control valves can be set and connected to the indoor auxiliary heat exchanger 8 and the outdoor heat exchanger 1 respectively, thereby switching between the heating mode and the defrosting mode of the air conditioning system.

[0069] Specifically, there are two first control valves; one of the first control valves (i.e., defrosting control valve 11) is connected at one end to the hot end outlet 73 and at the other end to the outdoor heat exchanger 1 and the electronic expansion valve 10; the other first control valve (i.e., heating control valve 12) is connected at one end to the hot end outlet 73 and at the other end to one end of the indoor auxiliary heat exchanger 8, and the other end of the indoor auxiliary heat exchanger 8 is connected between the outdoor heat exchanger 1 and the electronic expansion valve 10.

[0070] Among them, the defrosting control valve 11 can also prevent a portion of the refrigerant flowing into the electronic expansion valve 10 through the first control valve into the vortex tube 7 during the cooling mode, thereby preventing damage to the vortex tube 7.

[0071] In this embodiment, a second control valve 13 is also included. One end of the second control valve 13 is connected to the fourth connection end 64, and the other end of the second control valve 13 is connected to the vortex inlet 71.

[0072] The second control valve 13 is mainly used to control the inflow of refrigerant into the vortex tube 7. When the air conditioning system is in cooling mode, part of the refrigerant at the outlet of the indoor heat exchanger 2 flows to the fourth connection terminal 64, and the other part flows to the vortex tube 7. After the refrigerant flowing to the vortex tube 7 undergoes heat separation, part of it will merge with the refrigerant discharged from the outdoor heat exchanger 1. However, the pressure of the refrigerant discharged from the outdoor heat exchanger 1 is much greater than the pressure of the refrigerant discharged from the indoor heat exchanger 2. This can easily cause large pressure fluctuations in the system, leading to a malfunction of the entire air conditioning system. Pipe 7 is also a type of expansion and pressure reduction device. If the refrigerant discharged from the indoor heat exchanger 2 is diverted to the vortex tube 7, the pressure of the refrigerant discharged from the cold end outlet 72 and the hot end outlet 73 of the vortex tube 7 will be lower than the pressure of the refrigerant discharged from the outdoor heat exchanger 1, resulting in a greater pressure difference. Due to the pressure difference, the refrigerant may flow back into the vortex tube 7, thereby damaging the vortex tube 7. The second control valve 13 can prevent the refrigerant discharged from the indoor heat exchanger 2 from flowing into the vortex tube 7 during the cooling mode, thus avoiding subsequent series of effects.

[0073] In this embodiment, a first check valve 14 is also included. The inlet of the first check valve 14 is connected to the electronic expansion valve 10, and the outlet of the first check valve 14 is connected to the outdoor heat exchanger 1.

[0074] Specifically, the first check valve 14 is located between the sixth connection end 92 and the eighth connection end 94, and simultaneously between the electronic expansion valve 10 and the outdoor heat exchanger 1. This ensures that the arrangement of the first check valve 14 will not affect the connection between the outdoor heat exchanger 1 and the sixth connection end 92, or the connection between the electronic expansion valve 10 and the eighth connection end 94.

[0075] The first one-way valve 14 is configured so that the refrigerant discharged from the electronic expansion valve 10 can flow into the outdoor heat exchanger 1, while the refrigerant discharged from the outdoor heat exchanger 1 cannot flow into the electronic expansion valve 10. This prevents a portion of the refrigerant discharged from the outdoor heat exchanger 1 from directly flowing into the electronic expansion valve 10 during the cooling mode. This ensures that all the refrigerant discharged from the outdoor heat exchanger 1 can enter the electronic expansion valve 10 after heat exchange with the liquid receiver 4, thereby effectively improving the cooling capacity and cooling effect of high-temperature cooling.

[0076] In this embodiment, a second one-way valve 15 is also included. The inlet of the second one-way valve 15 is connected to the eighth connection terminal 94, and the outlet of the second one-way valve 15 is connected between the first one-way valve 14 and the electronic expansion valve 10.

[0077] The second one-way valve 15 allows the refrigerant discharged from the eighth connection terminal 94 to flow into the electronic expansion valve 10, while the refrigerant discharged from the electronic expansion valve 10 cannot flow into the eighth connection terminal 94. This ensures that when the air conditioning system is in heating mode, all the refrigerant discharged from the electronic expansion valve 10 flows to the outdoor heat exchanger 1, thus preventing a portion of the refrigerant discharged from the electronic expansion valve 10 from merging with the refrigerant discharged from the cold end outlet 72 of the vortex tube 7. This prevents the temperature of the refrigerant entering the heat exchange tube 5 from decreasing, thereby preventing a decrease in the heat exchange effect between the refrigerant in the heat exchange tube 5 and the refrigerant in the liquid receiver 4. At the same time, the second one-way valve 15 does not affect the connection between the eighth connection terminal 94 and the electronic expansion valve 10 when the air conditioning system is cooling.

[0078] In this embodiment, a third one-way valve 16 is also included. The inlet of the third one-way valve 16 is connected to the seventh connection end 93, and the outlet of the third one-way valve 16 is connected to the heat exchange inlet of the heat exchange tube 5.

[0079] The third one-way valve 16 allows the refrigerant discharged from the seventh connection 93 to flow into the heat exchange tube 5, while the refrigerant discharged from the heat exchange tube 5 cannot flow into the seventh connection 93. This ensures that in heating and defrosting modes, all the refrigerant discharged from the cold end outlet 72 of the vortex tube 7 can flow into the heat exchange tube 5, thus preventing a portion of the refrigerant discharged from the cold end outlet 72 of the vortex tube 7 from flowing directly into the outdoor heat exchanger 1. This ensures the heat exchange effect between the refrigerant in the heat exchange tube 5 and the refrigerant in the liquid receiver 4. At the same time, the third one-way valve 16 will not affect the connection between the seventh connection 93 and the heat exchange tube 5 when the air conditioning system is cooling.

[0080] In this embodiment, a fourth one-way valve 17 is also included. The inlet of the fourth one-way valve 17 is connected to the cold end outlet 72, and the outlet of the fourth one-way valve 17 is connected between the third one-way valve 16 and the heat exchange inlet of the heat exchange tube 5.

[0081] The fourth one-way valve 17 is designed so that the refrigerant discharged from the cold end outlet 72 can flow into the heat exchange tube 5 or the fourth one-way valve 17, while the refrigerant discharged from the heat exchange tube 5 or the fourth one-way valve 17 cannot flow into the cold end outlet 72. This ensures that in cooling mode, all the refrigerant discharged from the fourth one-way valve 17 can flow into the heat exchange tube 5, thereby preventing a portion of the refrigerant discharged from the fourth one-way valve 17 from flowing directly into the cold end outlet 72. This ensures the heat exchange effect between the refrigerant in the heat exchange tube 5 and the refrigerant in the liquid receiver 4. At the same time, the fourth one-way valve 17 will not affect the connection between the cold end outlet 72 and the heat exchange tube 5 when the air conditioning system is heating and defrosting.

[0082] In this embodiment, a fifth check valve 18 is also included. The inlet of the fifth check valve 18 is connected to the indoor auxiliary heat exchanger 8, and the outlet of the fifth check valve 18 is connected between the first check valve 14 and the electronic expansion valve 10.

[0083] The fifth check valve 18 allows the refrigerant discharged from the indoor auxiliary heat exchanger 8 to flow into the first check valve 14 or the electronic expansion valve 10, while the refrigerant discharged from the first check valve 14 or the electronic expansion valve 10 cannot flow into the indoor auxiliary heat exchanger 8. This ensures that in cooling mode, all the refrigerant discharged from the eighth connection terminal 94 flows into the electronic expansion valve 10, thus preventing a portion of the refrigerant discharged from the eighth connection terminal 94 from directly flowing into the indoor auxiliary heat exchanger 8 and thus preventing the refrigerant discharged from the eighth connection terminal 94 from damaging the indoor auxiliary heat exchanger 8. At the same time, the fifth check valve 18 will not affect the connection between the indoor auxiliary heat exchanger 8 and the first check valve 14 when the air conditioning system is in heating mode.

[0084] The detailed steps for the heating, defrosting, and cooling modes of the entire air conditioning system are as follows:

[0085] Heating mode: After the high-temperature gaseous refrigerant from the compressor 3 outlet passes through the first regulating valve 6, a portion of the high-temperature exhaust directly enters the indoor heat exchanger 2 for condensation and heat release. The condensed refrigerant then enters the electronic expansion valve 10 for throttling and cooling. Another portion of the high-temperature exhaust from the compressor 3 enters the vortex tube 7 through the second control valve 13 for pressure reduction and hot-cold separation. The pressure at the hot end outlet 73 and the cold end outlet 72 is similar to the pressure after throttling by the electronic expansion valve 10. At the hot end outlet 73, a hot gas flow with a higher temperature than the compressor 3 exhaust is separated, and at the cold end outlet 72, a gas with a lower temperature than the compressor 3 exhaust is separated. The hotter airflow from the hot end outlet 73 of the vortex tube 7 enters the indoor auxiliary heat exchanger 8 through the first control valve, where it condenses and releases heat to rapidly heat the indoor air. The refrigerant from the outlet of the indoor auxiliary heat exchanger 8 flows out through the fifth one-way valve 18 and is combined with the refrigerant from the outlet of the electronic expansion valve 10 before entering the outdoor heat exchanger 1 through the first one-way valve 14 for evaporation. The refrigerant from the cold end outlet 72 enters the heat exchange tube 5 and exchanges heat with the low-temperature refrigerant in the liquid receiver 4 before entering the outdoor heat exchanger 1 through the second regulating valve 9. The refrigerant from the outlet of the outdoor heat exchanger 1 flows through the liquid receiver 4 and finally enters the suction port of the compressor 3, thus completing the cycle.

[0086] Defrosting Mode: After passing through the first regulating valve 6, a portion of the high-temperature gaseous refrigerant from the compressor 3 outlet directly enters the indoor heat exchanger 2 for condensation and heat release. The condensed refrigerant then enters the electronic expansion valve 10 for throttling, cooling, and pressure reduction. Another portion of the high-temperature compressor 3 outlet passes through the second control valve 13 into the vortex tube 7 for pressure reduction and hot-cold separation. The pressures at the hot end outlet 73 and the cold end outlet 72 are similar to the pressure after throttling by the electronic expansion valve 10. At the hot end outlet 73, a hot gas flow with a temperature higher than the compressor 3 outlet temperature is separated, while at the cold end outlet 72, a gas with a temperature lower than the compressor 3 outlet temperature is separated. The gas separated at the hot end outlet 73, with a temperature higher than the compressor 3 outlet temperature, enters the outdoor heat exchanger 1 for defrosting through the first control valve. The gas separated at the cold end outlet 72 of the vortex tube 7, with a temperature lower than the compressor 3 outlet temperature, enters the heat exchange tube 5 and heats the low-temperature refrigerant in the liquid receiver 4. The refrigerant at the outlet of the heat exchange tube 5 then enters the outdoor heat exchanger 1 through the second regulating valve 9 for further defrosting or evaporation. The refrigerant from the outlet of outdoor heat exchanger 1 flows through liquid receiver 4 and finally enters the suction port of compressor 3, thus repeating the cycle.

[0087] Cooling mode: The high-temperature refrigerant from the compressor 3 outlet enters the outdoor heat exchanger 1 for cooling and condensation after passing through the first regulating valve 6. Then, it enters the heat exchange tube 5 through the second regulating valve 9 and the third one-way valve 16, where it exchanges heat with the low-temperature refrigerant in the liquid receiver 4. After passing through the second regulating valve 9 and the second one-way valve 15, it enters the electronic expansion valve 10 for expansion, pressure reduction, and cooling. The refrigerant from the outlet of the electronic expansion valve 10 enters the indoor heat exchanger 2 for evaporation. The refrigerant from the outlet of the indoor heat exchanger 2 enters the liquid receiver 4 and finally enters the suction port of the compressor 3. This cycle repeats continuously.

[0088] In this embodiment, please refer to Figure 8 The control method for the heating mode is as follows: control the first connection end 61 and the fourth connection end 64 in the first regulating valve 6, and the second connection end 62 and the third connection end 63 to be connected; control the fifth connection end 91 and the sixth connection end 92 in the second regulating valve 9 to be connected; open the heating control valve 12 and the second control valve 13; and close the defrosting control valve 11.

[0089] The defrosting mode is controlled as follows: the first connection end 61 of the first regulating valve 6 is connected to the fourth connection end 64, and the second connection end 62 is connected to the third connection end 63; the fifth connection end 91 of the second regulating valve 9 is connected to the sixth connection end 92; the defrosting control valve 11 and the second control valve 13 are opened; and the heating control valve 12 is closed.

[0090] The cooling mode is controlled by connecting the first connection end 61 to the second connection end 62 and the fourth connection end 64 to the third connection end 63 in the first regulating valve 6, connecting the fifth connection end 91 to the eighth connection end 94 and the sixth connection end 92 to the seventh connection end 93 in the second regulating valve 9, and closing the heating control valve 12, the defrosting control valve 11 and the second control valve 13.

[0091] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

[0092] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusivity.

[0093] The term "comprises" implies that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An air conditioning system, characterized in that, include: The system includes an outdoor heat exchanger, an indoor heat exchanger, a compressor, a liquid storage tank, and heat exchange tubes. The heat exchange tubes are mounted on the liquid storage tank. The compressor, outdoor heat exchanger, heat exchange tubes, indoor heat exchanger, and liquid storage tank are connected in sequence. The liquid storage tank is also connected to the compressor. It also includes a first regulating valve and a vortex tube. The first regulating valve includes a first connecting end, a second connecting end, a third connecting end and a fourth connecting end. The vortex tube includes a vortex inlet, a cold end outlet and a hot end outlet. In cooling mode, the compressor outlet is connected to the first connection end, the first connection end is connected to the second connection end, the second connection end is connected to the outdoor heat exchanger, the third connection end is connected to the liquid inlet of the liquid storage tank, the fourth connection end is connected to the third connection end, and the fourth connection end is connected to the indoor heat exchanger. In defrost mode, the compressor outlet is connected to the first connection end, the first connection end is connected to the fourth connection end, the fourth connection end is connected to the indoor heat exchanger and the vortex inlet respectively, the second connection end is connected to the outdoor heat exchanger, the second connection end is connected to the third connection end, the third connection end is connected to the liquid inlet of the liquid storage tank, the cold end outlet is connected to the heat exchange inlet located on the heat exchange tube, and the hot end outlet is connected to the outdoor heat exchanger. It also includes a second regulating valve, which includes a fifth connecting end, a sixth connecting end, a seventh connecting end, and an eighth connecting end; In defrosting mode, the fifth connection end and the sixth connection end are connected, the fifth connection end is connected to the heat exchange outlet of the heat exchange tube, the sixth connection end is connected to the outdoor heat exchanger, and the seventh connection end and the eighth connection end are connected. In cooling mode, the fifth and eighth connection terminals are connected, the sixth and seventh connection terminals are connected, the fifth connection terminal is connected to the heat exchange outlet of the heat exchange tube, the seventh connection terminal is connected to the heat exchange inlet of the heat exchange tube, the sixth connection terminal is connected to the outdoor heat exchanger, and the eighth connection terminal is connected to the indoor heat exchanger.

2. The air conditioning system according to claim 1, characterized in that, It also includes an indoor auxiliary heat exchanger, with the hot end outlet connected to one end of the indoor auxiliary heat exchanger and the other end of the indoor auxiliary heat exchanger connected to the outdoor heat exchanger. In heating mode, the compressor outlet is connected to the first connection end, the first connection end is connected to the fourth connection end, the fourth connection end is connected to the indoor heat exchanger and the vortex inlet, the second connection end is connected to the outdoor heat exchanger, the second connection end is connected to the third connection end, the third connection end is connected to the liquid inlet of the liquid storage tank, the cold end outlet is connected to the heat exchange inlet located on the heat exchange tube, and the hot end outlet is connected to the indoor auxiliary heat exchanger.

3. The air conditioning system according to claim 2, characterized in that, In heating mode, the fifth connection end and the sixth connection end are connected, the fifth connection end is connected to the heat exchange outlet of the heat exchange tube, and the sixth connection end is connected to the outdoor heat exchanger.

4. The air conditioning system according to claim 2, characterized in that, It also includes an electronic expansion valve and a first control valve. The electronic expansion valve is connected between the outdoor heat exchanger and the indoor heat exchanger. One end of the first control valve is connected to the hot end outlet, and the other end of the first control valve is connected to the indoor auxiliary heat exchanger. Alternatively, the other end of the first control valve can be connected between the outdoor heat exchanger and the electronic expansion valve.

5. The air conditioning system according to claim 4, characterized in that, There are two of the first control valves; One end of one of the first control valves is connected to the hot end outlet, and the other end is connected between the outdoor heat exchanger and the electronic expansion valve; Another first control valve has one end connected to the hot end outlet and the other end connected to one end of the indoor auxiliary heat exchanger. The other end of the indoor auxiliary heat exchanger is connected between the outdoor heat exchanger and the electronic expansion valve.

6. The air conditioning system according to claim 1, characterized in that, It also includes a second control valve, one end of which is connected to the fourth connection end, and the other end of which is connected to the vortex inlet.

7. The air conditioning system according to claim 4, characterized in that, It also includes a first check valve, the inlet of which is connected to an electronic expansion valve, and the outlet of which is connected to an outdoor heat exchanger.

8. The air conditioning system according to claim 7, characterized in that, It also includes a second check valve, the inlet of which is connected to the eighth connection terminal, and the outlet of which is connected between the first check valve and the electronic expansion valve.

9. The air conditioning system according to claim 1, characterized in that, It also includes a third one-way valve, the inlet of which is connected to the seventh connection end, and the outlet of which is connected to the heat exchange inlet of the heat exchange tube.

10. The air conditioning system according to claim 9, characterized in that, It also includes a fourth check valve, the inlet of which is connected to the cold end outlet, and the outlet of which is connected between the third check valve and the heat exchange inlet of the heat exchange tube.

11. The air conditioning system according to claim 7, characterized in that, It also includes a fifth check valve, the inlet of which is connected to the indoor auxiliary heat exchanger, and the outlet of which is connected between the first check valve and the electronic expansion valve.

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