Air conditioning system and operation control method thereof

Abstract

The application discloses an air conditioner system and an operation control method thereof, and belongs to the technical field of air conditioners. The air conditioner system comprises an air conditioner heat exchange assembly, an air conditioner air supplement assembly, and a radiator. The air conditioner heat exchange assembly comprises a compressor, a heat exchanger and a communication valve. The compressor is connected with the heat exchanger through the communication valve. The communication valve comprises a first communication valve and a second communication valve. The air conditioner air supplement assembly comprises a flash evaporator connected with the compressor, a first throttling element connected with the flash evaporator and a second throttling element connected with the flash evaporator. The second throttling element is arranged between the flash evaporator and the second communication valve. The radiator is arranged between the first throttling element and the second communication valve. The compressor is connected with the heat exchanger through the communication valve, the flash evaporator is arranged to supplement air and increase enthalpy, the throttling elements are arranged to realize two-stage throttling, and the radiator is arranged between the flash evaporator and the second communication valve, so that the refrigerant entering the radiator in different operation modes is the refrigerant before throttling, and condensation is avoided when the radiator dissipates heat due to the excessively low temperature of the refrigerant.

Description

Technical Field

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

[0002] In the field of air conditioning technology, refrigerant heat dissipation technology is a technique that reduces the temperature of electronic control components through the heat conduction between the refrigerant heat dissipation pipe and the electronic control module, enabling more efficient heat dissipation for the air conditioning system's electronic control module. Currently, existing air conditioning systems typically place the refrigerant heat sink between the indoor and outdoor heat exchangers, and install a throttling element on the inlet and outlet pipes of the refrigerant heat sink. By controlling the state of the throttling element, it is ensured that the refrigerant entering the refrigerant heat sink is the liquid refrigerant before throttling, regardless of whether it is in cooling or heating mode, to prevent the refrigerant temperature from being too low and causing condensation on the electronic control module, which could damage the circuit board.

[0003] However, in air conditioning systems requiring enthalpy boosting through gas injection, a flash evaporator is added for this purpose. The refrigerant gas separated from the flash evaporator needs to be supplied to the compressor, and throttling elements are required on the inlet and outlet pipes of the flash evaporator to achieve two-stage throttling. This means the refrigerant first undergoes a first-stage throttling process before entering the flash evaporator, and then exits through a second-stage throttling process. This results in a situation where, regardless of where the refrigerant heat dissipation module is located on the pipe section, it cannot be guaranteed that the refrigerant entering the heat dissipation module is the liquid refrigerant before throttling, whether in cooling or heating mode. This leads to condensation on the electronic control module during heat dissipation due to excessively low refrigerant temperature, affecting safety. Currently, there is no satisfactory solution to this problem.

[0004] For example, existing technology CN211551844U proposes using two one-way valves to control the cooling of the refrigerant radiator. During air conditioning cooling, the refrigerant passes through the radiator via the one-way valves, then through the throttling element and into the flash evaporator. However, during heating, the refrigerant bypasses the radiator and directly utilizes the outdoor ambient temperature for heat dissipation. This poses a risk of damaging electronic control components under high-temperature heating conditions. Another example is existing technology CN114001484A, which proposes two refrigerant cooling methods. The first method requires the refrigerant to undergo throttling and pressure reduction before entering the radiator and then the flash evaporator. This may cause condensation in the electronic control module due to the excessively low temperature of the refrigerant after throttling. The second method uses an economizer instead of the flash evaporator for enthalpy increase and gas replenishment. In this method, the refrigerant radiator is located between the economizer and the suction port, or between the throttling element and the economizer. The refrigerant entering the radiator is the throttled refrigerant, and this method only allows for primary throttling and cannot achieve secondary throttling.

[0005] Therefore, how to ensure that the refrigerant entering the refrigerant radiator is the same liquid refrigerant before throttling in different operating modes while achieving two-stage throttling is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] This invention provides an air conditioning system and its operation control method, which aims to achieve two-stage throttling while ensuring that the refrigerant entering the radiator is the same as the refrigerant before throttling in different operating modes.

[0007] In a first aspect, embodiments of the present invention provide an air conditioning system, the air conditioning system comprising:

[0008] An air conditioning heat exchange assembly includes a compressor, a heat exchanger, and a connecting valve. The compressor is connected to the heat exchanger via the connecting valve. The heat exchanger includes an indoor heat exchanger and an outdoor heat exchanger. The connecting valve includes a first connecting valve and a second connecting valve. The indoor heat exchanger and the outdoor heat exchanger are both disposed between the first connecting valve and the second connecting valve.

[0009] An air conditioning gas supply assembly includes: a flash evaporator connected to the compressor and a first throttling element and a second throttling element connected to the flash evaporator, wherein the second throttling element is disposed between the flash evaporator and the second connecting valve;

[0010] A radiator is disposed between the first throttling element and the second connecting valve.

[0011] Preferably, the inlet end of the first throttling element is connected to the outlet end of the radiator, and the outlet end of the first throttling element is connected to the flash evaporator;

[0012] The inlet end of the second throttling element is connected to the flash evaporator, and the outlet end of the second throttling element is connected to the second connecting valve.

[0013] Preferably, the first connecting valve includes four connecting ports: a first connecting port, a second connecting port, a third connecting port, and a fourth connecting port;

[0014] The second connecting valve includes four connecting ports: a fifth connecting port, a sixth connecting port, a seventh connecting port, and an eighth connecting port;

[0015] The compressor is equipped with an exhaust port, a gas inlet port, and a gas inlet port;

[0016] The first connecting port is connected to the exhaust port, the second connecting port is connected to the indoor heat exchanger, the third connecting port is connected to the outdoor heat exchanger, and the fourth connecting port is connected to the air intake port;

[0017] The fifth connecting port is connected to the inlet end of the radiator, the sixth connecting port is connected to the outdoor heat exchanger, the seventh connecting port is connected to the indoor heat exchanger, and the eighth connecting port is connected to the outlet end of the second throttling element.

[0018] Preferably, the flash evaporator is provided with a first flash port, a second flash port and a third flash port;

[0019] The first flash port is connected to the gas supply port, the second flash port is connected to the outlet end of the first throttling element, and the third flash port is connected to the inlet end of the second throttling element.

[0020] Preferably, the first throttling element and the second throttling element are both one of an electronic expansion valve, a throttling valve, or a capillary tube.

[0021] Secondly, embodiments of the present invention also provide an operation control method, applied to the air conditioning system described above, the operation control method comprising:

[0022] During the operation of the air conditioning system, detect the current operating mode of the air conditioning system;

[0023] The connection valve is controlled according to the current operating mode of the air conditioning system, so that the refrigerant enters the radiator and the air conditioning gas supply component in sequence.

[0024] The radiator is used for heat dissipation, and the air conditioning air supply component is used for air supply and enthalpy increase.

[0025] Preferably, controlling the connection of the connecting valve according to the current operating mode of the air conditioning system, so that the refrigerant sequentially enters the radiator and the air conditioning air supply assembly, includes:

[0026] When the air conditioning system is in cooling mode, it controls the first connection port to connect with the third connection port, and controls the second connection port to connect with the fourth connection port;

[0027] Control the connection between the fifth and sixth communication ports, and control the connection between the seventh and eighth communication ports.

[0028] Preferably, the step of using the radiator for heat dissipation and using the air conditioning air supply component for air supply and enthalpy increase includes:

[0029] When the air conditioning system is in cooling mode, the refrigerant discharged by the compressor passes through the first connecting valve, the outdoor heat exchanger, and the second connecting valve in sequence before entering the radiator. In the radiator, the electronic control module of the air conditioning system is cooled down. After cooling down, the refrigerant is throttled and depressurized by the first throttling element before entering the flash evaporator for gas-liquid separation to obtain gaseous refrigerant and liquid refrigerant.

[0030] The gaseous refrigerant is input into the compressor for refueling;

[0031] The liquid refrigerant is input to the second throttling element for throttling and pressure reduction, and then sequentially input to the compressor via the second connecting valve, the indoor heat exchanger, and the first connecting valve.

[0032] Preferably, the step of controlling the connection of the connecting valve according to the current operating mode of the air conditioning system, so that the refrigerant sequentially enters the radiator and the air conditioning air supply component, further includes:

[0033] When the air conditioning system is in heating mode, it controls the connection between the first connection port and the second connection port, and controls the connection between the third connection port and the fourth connection port;

[0034] Control the connection between the fifth and seventh communication ports, and control the connection between the sixth and eighth communication ports.

[0035] Preferably, the method of using the radiator for heat dissipation and using the air conditioning air supply component for air supply and enthalpy increase further includes:

[0036] When the air conditioning system is in heating mode, the refrigerant discharged by the compressor passes through the first connecting valve, the indoor heat exchanger, and the second connecting valve in sequence before entering the radiator. In the radiator, the electronic control module of the air conditioning system is cooled down. After cooling down, the refrigerant is throttled and depressurized by the first throttling element before entering the flash evaporator for gas-liquid separation to obtain gaseous refrigerant and liquid refrigerant.

[0037] The gaseous refrigerant is input into the compressor for refueling;

[0038] The liquid refrigerant is input to the second throttling element for throttling and pressure reduction, and then sequentially input to the compressor via the second connecting valve, the outdoor heat exchanger, and the first connecting valve.

[0039] This invention discloses an air conditioning system and its operation control method. The air conditioning system includes: an air conditioning heat exchange assembly, which includes a compressor, a heat exchanger, and a connecting valve. The compressor is connected to the heat exchanger through the connecting valve. The heat exchanger includes an indoor heat exchanger and an outdoor heat exchanger. The connecting valve includes a first connecting valve and a second connecting valve, and both the indoor and outdoor heat exchangers are disposed between the first and second connecting valves. An air conditioning gas supply assembly includes: a flash evaporator connected to the compressor and a first throttling element and a second throttling element simultaneously connected to the flash evaporator. The second throttling element is disposed between the flash evaporator and the second connecting valve. A radiator is disposed between the first throttling element and the second connecting valve. This invention connects the compressor to the indoor and outdoor heat exchangers via a first and second connecting valve, respectively. A flash evaporator connects the compressor and a throttling element for gas-liquid separation to replenish the air conditioning system's enthalpy. Furthermore, the first and second throttling elements enable two-stage throttling for replenishing the air conditioning system's enthalpy, improving system performance. The radiator is positioned between the first and second connecting valves to ensure that the refrigerant entering the radiator is always the refrigerant before throttling, preventing condensation due to low refrigerant temperature during heat dissipation and further avoiding damage to the air conditioner caused by condensation. This improves the performance and reliability of the air conditioning system and extends its service life. Attached Figure Description

[0040] 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.

[0041] Figure 1 A schematic diagram of an air conditioning system provided in an embodiment of the present invention;

[0042] Figure 2 A flowchart illustrating an operation control method provided in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of a sub-process of an operation control method provided in an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of another sub-process of an operation control method provided in an embodiment of the present invention;

[0045] Figure 5 This is an example diagram of refrigerant flow direction in a cooling mode in an operation control method provided by an embodiment of the present invention;

[0046] Figure 6 This is an example diagram of refrigerant flow direction in heating mode in an operation control method provided by an embodiment of the present invention.

[0047] The diagram shows the following components: 10, compressor; 11, exhaust port; 12, air inlet; 13, air intake; 20, indoor heat exchanger; 30, outdoor heat exchanger; 40, first connecting valve; 41, first connecting port; 42, second connecting port; 43, third connecting port; 44, fourth connecting port; 50, second connecting valve; 51, fifth connecting port; 52, sixth connecting port; 53, seventh connecting port; 54, eighth connecting port; 60, flash evaporator; 61, first flash port; 62, second flash port; 63, third flash port; 70, first throttling element; 80, second throttling element; 90, radiator. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Please see below. Figure 1 , Figure 1 A schematic diagram of an air conditioning system provided in an embodiment of the present invention specifically includes:

[0053] An air conditioning heat exchange assembly includes a compressor 10, a heat exchanger, and a connecting valve. The compressor 10 is connected to the heat exchanger via the connecting valve. The heat exchanger includes an indoor heat exchanger 20 and an outdoor heat exchanger 30. The connecting valve includes a first connecting valve 40 and a second connecting valve 50. The indoor heat exchanger 20 and the outdoor heat exchanger 30 are both disposed between the first connecting valve 40 and the second connecting valve 50.

[0054] An air conditioning gas supply assembly includes: a flash evaporator 60 connected to the compressor 10 and a first throttling element 70 and a second throttling element 80 simultaneously connected to the flash evaporator 60, wherein the second throttling element 80 is disposed between the flash evaporator 60 and the second connecting valve 50.

[0055] The radiator 90 is disposed between the first throttling element 70 and the second connecting valve 50.

[0056] In this embodiment, the compressor 10 is connected to the indoor heat exchanger 20 and the outdoor heat exchanger 30 by setting a first connecting valve 40 and a second connecting valve 50. A flash evaporator 60 is set to connect the compressor 10 and the throttling element to replenish gas and increase enthalpy in the air conditioning system. Furthermore, a two-stage throttling process for replenishing gas and increasing enthalpy in the air conditioning system is achieved by setting a first throttling element 70 and a second throttling element 80. The radiator 90 is positioned between the first throttling element 70 and the second connecting valve 50 to ensure that the refrigerant entering the radiator 90 is the refrigerant before throttling in different operating modes. This avoids condensation on the electronic control module of the air conditioning system due to excessively low refrigerant temperature when the radiator 90 dissipates heat, further preventing damage to the circuit board in the air conditioning electronic control module due to condensation. This improves the performance and reliability of the air conditioning system and extends its service life. Simultaneously, this embodiment uses a flash evaporator 60 for gas-liquid separation to replenish gas and increase enthalpy in the air conditioning system, which not only improves the performance of the air conditioning system but also avoids the problem of liquid return from the compressor 10. This embodiment also achieves two-stage throttling by setting two throttling elements, thereby improving system performance.

[0057] In one embodiment, the inlet end of the first throttling element 70 is connected to the outlet end of the radiator 90, and the outlet end of the first throttling element 70 is connected to the flash evaporator 60.

[0058] The inlet end of the second throttling element 80 is connected to the flash evaporator 60, and the outlet end of the second throttling element 80 is connected to the second connecting valve 50.

[0059] In this embodiment, the inlet and outlet ends of the first throttling element 70 are respectively connected to the outlet end of the radiator 90 and the flash evaporator 60, and the inlet and outlet ends of the second throttling element 80 are respectively connected to the flash evaporator 60 and the second connecting valve 50, so that the refrigerant passes through the radiator 90 first and then through the throttling element, thereby avoiding the refrigerant temperature entering the radiator 90 being too low.

[0060] In one embodiment, the first connecting valve 40 includes four connecting ports: a first connecting port 41, a second connecting port 42, a third connecting port 43, and a fourth connecting port 44;

[0061] The second connecting valve 50 includes four connecting ports: a fifth connecting port 51, a sixth connecting port 52, a seventh connecting port 53, and an eighth connecting port 54;

[0062] The compressor 10 is provided with an exhaust port 11, an air supply port 12 and an air intake port 13;

[0063] The first connecting port 41 is connected to the exhaust port 11, the second connecting port 42 is connected to the indoor heat exchanger 20, the third connecting port 43 is connected to the outdoor heat exchanger 30, and the fourth connecting port 44 is connected to the air intake port 13.

[0064] The fifth connection port 51 is connected to the inlet end of the radiator 90, the sixth connection port 52 is connected to the outdoor heat exchanger 30, the seventh connection port 53 is connected to the indoor heat exchanger 20, and the eighth connection port 54 is connected to the outlet end of the second throttling element 80.

[0065] In this embodiment, four connection ports are provided on both the first connection valve 40 and the second connection valve 50. The first connection valve 40 includes a first connection port 41, a second connection port 42, a third connection port 43 and a fourth connection port 44, and the second connection valve 50 includes a fifth connection port 51, a sixth connection port 52, a seventh connection port 53 and an eighth connection port 54. Thus, the various circuits of the air conditioning system are connected through the connection ports to realize the refrigerant transportation of the air conditioning system in various operating modes.

[0066] In this embodiment, the compressor 10 is also provided with an exhaust port 11, a gas inlet 12 and a gas inlet 13, and the normal operation of the air conditioning system is realized through the exhaust port 11 and the gas inlet 13, and the gas inlet 12 is used to increase the enthalpy by adding gas.

[0067] Specifically, in this embodiment, the first connecting port 41 is connected to the exhaust port 11, the second connecting port 42 is connected to the indoor heat exchanger 20, and the third connecting port 43 is connected to the outdoor heat exchanger 30, so that the compressed gas output by the compressor 10 can be delivered to the corresponding indoor heat exchanger 20 or outdoor heat exchanger 30 according to different operating modes and specific needs; and the fourth connecting port 44 is connected to the suction port 13, so that the gas that has completed cooling or heating through the air conditioning circuit can return to the compressor 10; and the fifth connecting port 51 is connected to the inlet end of the radiator 90, the sixth connecting port 52 is connected to the outdoor heat exchanger 30, and the seventh connecting port 53 is connected to the indoor heat exchanger 20. This ensures that, regardless of whether the refrigerant flows from the outdoor heat exchanger 30 to the second connecting valve 50 in cooling mode or from the indoor heat exchanger 20 to the second connecting valve 50 in heating mode, the refrigerant can first pass through the radiator 90 before entering the throttling element for throttling and pressure reduction, thus preventing the refrigerant temperature entering the radiator 90 from being too low and affecting the safety of the radiator 90 in heat dissipation; and by connecting the eighth connecting port 54 to the outlet end of the second throttling element 80, the refrigerant after flash gas injection and throttling and pressure reduction can return to the second connecting valve 50, and thus be delivered to the indoor heat exchanger 20 or the outdoor heat exchanger 30 according to the specific operating mode.

[0068] In one embodiment, the flash evaporator 60 is provided with a first flash port 61, a second flash port 62 and a third flash port 63;

[0069] The first flash port 61 is connected to the air supply port 12, the second flash port 62 is connected to the outlet end of the first throttling element 70, and the third flash port 63 is connected to the inlet end of the second throttling element 80.

[0070] In this embodiment, the flash evaporator 60 is provided with three ports: a first flash port 61, a second flash port 62, and a third flash port 63. The first flash port 61 is connected to the gas supply port 12 to deliver the gaseous refrigerant generated by the gas-liquid separation of the flash evaporator 60 to the compressor 10 for gas supply. The second flash port 62 is connected to the outlet end of the first throttling element 70 to receive the refrigerant after the first throttling. The third flash port 63 is connected to the inlet end of the second throttling element 80 to deliver the liquid refrigerant generated by the gas-liquid separation of the flash evaporator 60 to the second throttling element 80 for secondary throttling.

[0071] In a specific embodiment, the flash evaporator 60 can be a three-pipe flash evaporator, and the three ports of the three-pipe flash evaporator are respectively set as the first flash port 61, the second flash port 62 and the third flash port 63.

[0072] In one embodiment, the first throttling element 70 and the second throttling element 80 are both one of an electronic expansion valve, a throttling valve, or a capillary tube.

[0073] In this embodiment, an electronic expansion valve, a throttle valve, or a capillary tube can be selected as the throttling element according to different actual needs. Of course, in other embodiments, the throttling element is not limited to one of the electronic expansion valve, throttle valve, or capillary tube; a component with higher adaptability can be selected as the throttling element according to the specific application.

[0074] Combination Figure 2 As shown, this embodiment of the invention also provides an operation control method, applied to the air conditioning system described in any of the above claims, the operation control method including steps S201 to S203.

[0075] S201. During the operation of the air conditioning system, detect the current operating mode of the air conditioning system;

[0076] S202. Control the connection of the connecting valve according to the current operating mode of the air conditioning system, so that the refrigerant enters the radiator 90 and the air conditioning gas supply component in sequence.

[0077] S203. Heat dissipation is performed using the radiator 90, and air replenishment and enthalpy increase are performed using the air conditioning replenishment component.

[0078] In this embodiment, the current operating mode of the air conditioning system is first detected, and then the connection between different connection ports in the connecting valve is controlled according to the current operating mode of the air conditioning system, so that the refrigerant is delivered according to the specific circuit of the operating mode, and enters the radiator 90 for heat dissipation, and enters the air conditioning gas replenishment component for gas replenishment and enthalpy increase.

[0079] In specific application scenarios, refrigerant is usually throttled and depressurized by a throttling element. For an ideal refrigerant cycle, the refrigerant after throttling and depressurization is a low-temperature, low-pressure saturated liquid. This allows the refrigerant to fully utilize its latent heat and sensible heat characteristics in the air conditioner's heat exchanger, thereby improving the heat exchange capacity of the air conditioning system. However, in actual refrigerant cycles, some gas is usually flashed out after throttling and depressurization, meaning the refrigerant is in a two-phase state of gas and liquid at this point. Therefore, the process of the refrigerant undergoing the first throttling before entering the flash evaporator 60 can achieve gas-liquid separation of the refrigerant. The gaseous refrigerant is transported to the compressor 10 for gas replenishment through the gas inlet 12, while the liquid refrigerant is transported for a second throttling, and then, after heat exchange in the heat exchanger, it is transported to the compressor 10 through the suction port 13, thus completing the refrigerant cycle. In this embodiment, the first throttling element 70 and the second throttling element 80 can be adjustable throttling elements. By adjusting the opening of the two throttling elements respectively, the most suitable throttling method can be obtained to perform secondary throttling and pressure reduction of the air conditioning system, so as to fully utilize the performance of the air conditioning system.

[0080] Combination Figure 3 As shown, in one embodiment, step S202 includes steps S301 to S302.

[0081] S301. When the air conditioning system is in cooling mode, control the first communication port 41 to connect with the third communication port 43, and control the second communication port 42 to connect with the fourth communication port 44.

[0082] S302, Control the connection between the fifth communication port 51 and the sixth communication port 52, and control the connection between the seventh communication port 53 and the eighth communication port 54.

[0083] In this embodiment, when the current operating mode of the air conditioning system is detected to be cooling mode, the first connecting port 41 and the third connecting port 43 in the first connecting valve 40 are connected, the second connecting port 42 and the fourth connecting port 44 are connected, and the fifth connecting port 51 and the sixth connecting port 52, the seventh connecting port 53 and the eighth connecting port 54 in the second connecting valve 50 are connected.

[0084] Combination Figure 4 and Figure 5 As shown, in one embodiment, step S203 includes steps S401 to S403:

[0085] S401. When the air conditioning system is in cooling mode, the refrigerant discharged by the compressor 10 passes through the first connecting valve 40, the outdoor heat exchanger 30, and the second connecting valve 50 in sequence before entering the radiator 90. In the radiator 90, the electronic control module of the air conditioning system is cooled down. After cooling down, the refrigerant is throttled and depressurized by the first throttling element 70 before entering the flash evaporator 60 for gas-liquid separation to obtain gaseous refrigerant and liquid refrigerant.

[0086] S402, The gaseous refrigerant is input to the compressor 10 for refueling;

[0087] S403, the liquid refrigerant is input to the second throttling element 80 for throttling and pressure reduction, and then sequentially input to the compressor 10 through the second connecting valve 50, the indoor heat exchanger 20, and the first connecting valve 40.

[0088] In this embodiment, the refrigerant discharged from the compressor 10 passes through the first connecting valve 40, the outdoor heat exchanger 30, and the second connecting valve 50 in sequence before entering the radiator 90. The refrigerant in the radiator 90 is used to cool down the electronic control module of the air conditioning system. After cooling down, the refrigerant is output from the radiator 90 to the first throttling element 70 for the first throttling and pressure reduction, and then enters the flash evaporator 60 for gas-liquid separation to obtain gaseous refrigerant and liquid refrigerant. Among them, the gaseous refrigerant is input to the compressor 10 for gas replenishment, and the liquid refrigerant is input to the second throttling element 80 for the second throttling and pressure reduction. The liquid refrigerant after the second throttling and pressure reduction is then input to the compressor 10 in sequence through the second connecting valve 50, the indoor heat exchanger 20, and the first connecting valve 40.

[0089] This embodiment uses two connecting valves to ensure that the refrigerant entering the radiator 90 is the same as before throttling. This prevents condensation from forming on the electronic control module of the air conditioning system due to excessively low refrigerant temperature when the radiator 90 cools the module, further preventing damage to the circuit board in the electronic control module caused by condensation. This improves the performance and reliability of the air conditioning system and extends its service life. This embodiment also achieves two-stage throttling by using two throttling elements, improving system performance, and avoids the risk of liquid return from the compressor 10 through gas-liquid separation using the flash evaporator 60.

[0090] Specifically, when the air conditioning system is in cooling mode, the compressor 10 compresses the refrigerant from a low-temperature, low-pressure state to a high-temperature, high-pressure state. The refrigerant is first discharged from the compressor 10's exhaust port 11, then enters the first connecting valve 40 through the first connecting port 41, and is output to the outdoor heat exchanger 30 via the third connecting port 43. In the outdoor heat exchanger 30, it undergoes heat exchange and becomes a medium-temperature, medium-pressure refrigerant before being output and entering the second connecting valve 50 through the sixth connecting port 52. It is then output to the radiator 90 through the fifth connecting port 51, where it cools the air conditioning system's electronic control module. Finally, it is output from the radiator 90 to the first throttling element 70 for the first throttling process. The refrigerant is depressurized and converted into a low-temperature, low-pressure refrigerant. It then enters the flash evaporator 60 through the second flash port 62 for gas-liquid separation. The gaseous refrigerant after separation is output from the first flash port 61 to the air inlet 12 and input into the compressor 10 for the next compression cycle. The liquid refrigerant after separation is output from the third flash port 63 to the second throttling element 80 for secondary throttling and depressurization. It then passes through the eighth connecting port 54 and the seventh connecting port 53 sequentially to the indoor heat exchanger 20 for heat exchange. Finally, it is output from the indoor heat exchanger 20 and sequentially passes through the second connecting port 42, the fourth connecting port 44, and the suction port 13 to the compressor 10 for the next compression cycle. This completes the refrigerant's refrigeration cycle in the air conditioning system. During this process, the indoor heat exchanger 20 absorbs heat from the indoor environment, lowering the indoor temperature and thus achieving the purpose of cooling.

[0091] In one embodiment, step S202 further includes:

[0092] When the air conditioning system is in heating mode, it controls the connection between the first communication port 41 and the second communication port 42, and controls the connection between the third communication port 43 and the fourth communication port 44.

[0093] Control the connection between the fifth communication port 51 and the seventh communication port 53, and control the connection between the sixth communication port 52 and the eighth communication port 54.

[0094] In this embodiment, when it is detected that the current operating mode of the air conditioning system is heating mode, the first connecting port 41 of the first connecting valve 40 is connected to the second connecting port 42, the third connecting port 43 is connected to the fourth connecting port 44, and the fifth connecting port 51 of the second connecting valve 50 is connected to the seventh connecting port 53, the sixth connecting port 52 and the eighth connecting port 54.

[0095] In a specific embodiment, a four-way valve can be used as the first connecting valve 40 and / or the second connecting valve 50. For the first connecting valve 40, the first connecting port 41 will be connected to one of the second connecting port 42 or the third connecting port 43 in different modes, and the fourth connecting port 44 will be connected to the other port. Similarly, for the second connecting valve 50, the fifth connecting port 51 will be connected to one of the sixth connecting port 52 or the seventh connecting port 53 in different modes, and the eighth connecting port 54 will be connected to the other port.

[0096] Combination Figure 6 As shown, in one embodiment, step S203 further includes:

[0097] When the air conditioning system is in heating mode, the refrigerant discharged by the compressor 10 passes through the first connecting valve 40, the indoor heat exchanger 20, and the second connecting valve 50 in sequence before entering the radiator 90. In the radiator 90, the electronic control module of the air conditioning system is cooled down. After cooling down, the refrigerant is throttled and depressurized by the first throttling element 70 before entering the flash evaporator 60 for gas-liquid separation to obtain gaseous refrigerant and liquid refrigerant.

[0098] The gaseous refrigerant is input to the compressor 10 for refueling;

[0099] The liquid refrigerant is input to the second throttling element 80 for throttling and pressure reduction, and then sequentially input to the compressor 10 through the second connecting valve 50, the outdoor heat exchanger 30, and the first connecting valve 40.

[0100] In this embodiment, the refrigerant discharged from the compressor 10 passes through the first connecting valve 40, the indoor heat exchanger 20, and the second connecting valve 50 in sequence before entering the radiator 90. The refrigerant in the radiator 90 dissipates heat and cools the electronic control module of the air conditioning system. After cooling, the refrigerant is output from the radiator 90 to the first throttling element 70 for the first throttling and pressure reduction, and then enters the flash evaporator 60 for gas-liquid separation to obtain gaseous refrigerant and liquid refrigerant. Among them, the gaseous refrigerant is input to the compressor 10 for gas replenishment, and the liquid refrigerant is input to the second throttling element 80 for the second throttling and pressure reduction. The liquid refrigerant after the second throttling and pressure reduction then passes through the second connecting valve 50, the outdoor heat exchanger 30, and the first connecting valve 40 in sequence before being input to the compressor 10.

[0101] Specifically, when the air conditioning system is in heating mode, after the compressor 10 compresses the refrigerant from a low-temperature, low-pressure state to a high-temperature, high-pressure state, the refrigerant is first discharged from the compressor 10's exhaust port 11, then enters the first connecting valve 40 through the first connecting port 41, and is output to the indoor heat exchanger 20 through the second connecting port 42. In the indoor heat exchanger 20, it undergoes heat exchange and becomes a medium-temperature, medium-pressure refrigerant before being output and entering the second connecting valve 50 through the seventh connecting port 53. It is then output to the radiator 90 through the fifth connecting port 51, where it cools the air conditioning system's electronic control module. Finally, it is output from the radiator 90 to the first throttling element 70 for the first throttling process. The refrigerant is depressurized and converted into a low-temperature, low-pressure refrigerant. It then enters the flash evaporator 60 through the second flash port 62 for gas-liquid separation. The gaseous refrigerant after separation is output from the first flash port 61 to the air inlet 12 and input into the compressor 10 for the next compression cycle. The liquid refrigerant after separation is output from the third flash port 63 to the second throttling element 80 for secondary throttling and depressurization. It then passes through the eighth connecting port 54 and the sixth connecting port 52 sequentially to the outdoor heat exchanger 30 for heat exchange. Finally, it is output from the outdoor heat exchanger 30 and sequentially passes through the third connecting port 43, the fourth connecting port 44, and the suction port 13 to the compressor 10 for the next compression cycle. This completes the refrigerant heating cycle in the air conditioning system. During this process, the indoor heat exchanger 20 releases heat to the indoor environment, raising the indoor temperature and achieving the purpose of heating.

[0102] 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 systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are 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 application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0103] 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-exclusive inclusion, such 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. Without further limitations, an element defined by the phrase "comprising one..." 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, The air conditioning system includes: An air conditioning heat exchange assembly includes a compressor, a heat exchanger, and a connecting valve. The compressor is connected to the heat exchanger via the connecting valve. The heat exchanger includes an indoor heat exchanger and an outdoor heat exchanger. The connecting valve includes a first connecting valve and a second connecting valve. The indoor heat exchanger and the outdoor heat exchanger are both disposed between the first connecting valve and the second connecting valve. An air conditioning gas supply assembly includes: a flash evaporator connected to the compressor and a first throttling element and a second throttling element connected to the flash evaporator, wherein the second throttling element is disposed between the flash evaporator and the second connecting valve; A radiator is disposed between the first throttling element and the second connecting valve; The inlet end of the first throttling element is connected to the outlet end of the radiator, and the outlet end of the first throttling element is connected to the flash evaporator; the inlet end of the second throttling element is connected to the flash evaporator, and the outlet end of the second throttling element is connected to the second connecting valve. The first connecting valve includes four connecting ports: a first connecting port, a second connecting port, a third connecting port, and a fourth connecting port; the second connecting valve includes four connecting ports: a fifth connecting port, a sixth connecting port, a seventh connecting port, and an eighth connecting port; the compressor is provided with an exhaust port, a gas inlet port, and a gas inlet port; The first connecting port is connected to the exhaust port, the second connecting port is connected to the indoor heat exchanger, the third connecting port is connected to the outdoor heat exchanger, and the fourth connecting port is connected to the air intake port; The fifth connecting port is connected to the inlet end of the radiator, the sixth connecting port is connected to the outdoor heat exchanger, the seventh connecting port is connected to the indoor heat exchanger, and the eighth connecting port is connected to the outlet end of the second throttling element; Both the first and second connecting valves are four-way valves. The first connecting port is connected to either the second or third connecting port in different modes, while the fourth connecting port is connected to the other port. The fifth connecting port is connected to either the sixth or seventh connecting port in different modes, while the eighth connecting port is connected to the other port.

2. The air conditioning system according to claim 1, characterized in that, The flash evaporator is provided with a first flash port, a second flash port and a third flash port; The first flash port is connected to the gas supply port, the second flash port is connected to the outlet end of the first throttling element, and the third flash port is connected to the inlet end of the second throttling element.

3. The air conditioning system according to claim 1, characterized in that, The first throttling element and the second throttling element are both one of electronic expansion valve, throttling valve or capillary tube.

4. An operation control method for an air conditioning system, applied to the air conditioning system as described in any one of claims 1-3, characterized in that, The operation control method includes: During the operation of the air conditioning system, detect the current operating mode of the air conditioning system; The connection valve is controlled according to the current operating mode of the air conditioning system, so that the refrigerant enters the radiator and the air conditioning gas supply component in sequence. The radiator is used for heat dissipation, and the air conditioning air supply component is used for air supply and enthalpy increase.

5. The operation control method according to claim 4, characterized in that, The step of controlling the connection of the connecting valve according to the current operating mode of the air conditioning system, so that the refrigerant enters the radiator and the air conditioning gas supply component in sequence, includes: When the air conditioning system is in cooling mode, it controls the first connection port to connect with the third connection port, and controls the second connection port to connect with the fourth connection port; Control the connection between the fifth and sixth communication ports, and control the connection between the seventh and eighth communication ports.

6. The operation control method according to claim 5, characterized in that, The method of using the radiator for heat dissipation and using the air conditioning air supply component for air supply and enthalpy increase includes: When the air conditioning system is in cooling mode, the refrigerant discharged by the compressor passes through the first connecting valve, the outdoor heat exchanger, and the second connecting valve in sequence before entering the radiator. In the radiator, the electronic control module of the air conditioning system is cooled down. After cooling down, the refrigerant is throttled and depressurized by the first throttling element before entering the flash evaporator for gas-liquid separation to obtain gaseous refrigerant and liquid refrigerant. The gaseous refrigerant is input into the compressor for refueling; The liquid refrigerant is input to the second throttling element for throttling and pressure reduction, and then sequentially input to the compressor via the second connecting valve, the indoor heat exchanger, and the first connecting valve.

7. The operation control method according to claim 4, characterized in that, The method of controlling the connection of the connecting valve according to the current operating mode of the air conditioning system, so that the refrigerant enters the radiator and the air conditioning gas supply component in sequence, further includes: When the air conditioning system is in heating mode, it controls the connection between the first connection port and the second connection port, and controls the connection between the third connection port and the fourth connection port; Control the connection between the fifth and seventh communication ports, and control the connection between the sixth and eighth communication ports.

8. The operation control method according to claim 7, characterized in that, The method of using the radiator for heat dissipation and using the air conditioning air supply component for air supply and enthalpy increase also includes: When the air conditioning system is in heating mode, the refrigerant discharged by the compressor passes through the first connecting valve, the indoor heat exchanger, and the second connecting valve in sequence before entering the radiator. In the radiator, the electronic control module of the air conditioning system is cooled down. After cooling down, the refrigerant is throttled and depressurized by the first throttling element before entering the flash evaporator for gas-liquid separation to obtain gaseous refrigerant and liquid refrigerant. The gaseous refrigerant is input into the compressor for refueling; The liquid refrigerant is input to the second throttling element for throttling and pressure reduction, and then sequentially input to the compressor via the second connecting valve, the outdoor heat exchanger, and the first connecting valve.

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