Air conditioning apparatus and control method thereof

Abstract

This invention discloses an air conditioning device and its control method, belonging to the field of air conditioning technology. The heat pump unit of this air conditioning device includes a refrigerant circulation main loop, on which a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a gas-liquid separator are installed. The compressor has a gas inlet. The heat pump unit also includes an ejector device, a switching valve, and a first throttling component. The high-pressure inlet of the ejector device is connected to the compressor's exhaust port via the switching valve. The high-pressure inlet is also connected to the refrigerant pipeline between the outdoor and indoor heat exchangers via the first throttling component. The low-pressure inlet of the ejector device is connected to the liquid outlet of the gas-liquid separator, and the outlet of the ejector device is connected to the gas inlet. During compressor startup, the first throttling component is in a closed state and the switching valve is in an open state; during compressor operation, the switching valve is in a closed state. This invention at least solves the technical problem of liquid carryover during compressor startup and operation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of air conditioning, and particularly relates to an air conditioning device and a control method thereof. BACKGROUND

[0002] After the air conditioning device is left for a long time, the refrigerant will be deposited in the gas-liquid separator, and the suction of the compressor will be easy to bring liquid when starting, which will damage the compressor. The discharge temperature of R32 refrigerant is relatively high, and if the evaporation is not complete at the outlet of the evaporator during the operation of the air conditioning device, the refrigerant at the outlet of the evaporator is in a two-phase state, which will cause the suction of the compressor to bring liquid during the operation of the compressor, and the compressor will be damaged. SUMMARY

[0003] The air conditioning device and the control method thereof provided by the embodiments of the present application at least solve the technical problem of the suction of the compressor bringing liquid during the starting and operation of the compressor.

[0004] In a first aspect, the embodiments of the present application provide an air conditioning device, a heat pump unit of the air conditioning device comprising a refrigerant circulation main loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger and a gas-liquid separator being arranged on the refrigerant circulation main loop, the compressor having a charge port; the heat pump unit further comprising an ejector device, a switch valve and a first throttling component, a high-pressure inlet of the ejector device being connected to a discharge port of the compressor through the switch valve and connected to a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger through the first throttling component, a low-pressure inlet of the ejector device being in communication with a liquid outlet of the gas-liquid separator, and an outlet of the ejector device being connected to the charge port; wherein during the starting of the compressor, the first throttling component is in a closed state and the switch valve is in an open state, and during the operation of the compressor, the switch valve is in a closed state.

[0005] In combination with the first aspect, in some embodiments, the air conditioning device further comprises a control device, the switch valve and the first throttling component are electrically connected to the control device, and the control device is configured to: during the starting of the compressor, control the switch valve to be in an open state and control the first throttling component to be in a closed state, so that a part of the discharge of the compressor enters the ejector device through the switch valve, and the liquid refrigerant separated out of the gas-liquid separator is introduced into the ejector device for mixing and then enters the compressor from the charge port.

[0006] In combination with the first aspect, in some embodiments, the control device is further configured to: during operation of the compressor, control the on-off valve to be in a closed state and control the first throttling component to be in an open state, so that a portion of the refrigerant flowing out of the outdoor heat exchanger or the indoor heat exchanger enters the ejector through the first throttling component, and the liquid refrigerant separated from the gas-liquid separator is introduced into the ejector to mix and then enters the compressor from the gas injection port.

[0007] In combination with the first aspect, in some embodiments, the control device is further configured to: during operation of the compressor, control the on-off valve to be in a closed state, and determine whether to open the first throttling component according to an outdoor ambient temperature, a discharge temperature of the compressor and a suction superheat; and in the case that the first throttling component is in an open state, a portion of the refrigerant flowing out of the outdoor heat exchanger or the indoor heat exchanger enters the ejector through the first throttling component, and the liquid refrigerant separated from the gas-liquid separator is introduced into the ejector to mix and then enters the compressor from the gas injection port.

[0008] In combination with the first aspect, in some embodiments, the control device is further configured to: after opening the first throttling component, adjust an opening degree of the first throttling component according to the outdoor ambient temperature, the discharge temperature of the compressor and the suction superheat.

[0009] In combination with the first aspect, in some embodiments, the ejector comprises: an ejector, a high-pressure inlet and a low-pressure inlet of the ejector corresponding to a high-pressure inlet and a low-pressure inlet of the ejector; a subcooling heat exchanger having a first heat exchange unit and a second heat exchange unit, the first heat exchange unit being connected to a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, an outlet of the ejector being connected to an interface of the second heat exchange unit, and another interface of the second heat exchange unit being connected to the gas injection port as an outlet of the ejector.

[0010] In combination with the first aspect, in some embodiments, a four-way reversing valve is further arranged on the refrigerant circulation main loop; four interfaces of the four-way reversing valve are correspondingly connected to a discharge port of the compressor, an inlet of the gas-liquid separator, a first interface of the outdoor heat exchanger and a first interface of the indoor heat exchanger, and a second interface of the outdoor heat exchanger and a second interface of the indoor heat exchanger are connected; the four-way reversing valve is electrically connected to the control device, and the control device is further configured to: control the four-way reversing valve to switch between a first communication mode and a second communication mode, wherein the four-way reversing valve in the first communication mode causes the air conditioning equipment to operate in a cooling mode, and the four-way reversing valve in the second communication mode causes the air conditioning equipment to operate in a heating mode.

[0011] In combination with the first aspect, in some embodiments, a second throttling component is further arranged on the refrigerant circulation main loop; the second throttling component is connected to a refrigerant pipeline between the outdoor heat exchanger and the first heat exchange unit of the supercooling heat exchanger, and is in an open state in a cooling mode of the air conditioning device; the second throttling component is electrically connected to the control device, and the control device is further configured to adjust an opening degree of the second throttling component according to the suction superheat of the compressor when the air conditioning device operates in the cooling mode.

[0012] In combination with the first aspect, in some embodiments, a third throttling component is further arranged on the refrigerant circulation main loop; the third throttling component is connected to a refrigerant pipeline between the indoor heat exchanger and the supercooling heat exchanger, and is in an open state in a heating mode of the air conditioning device; the third throttling component is electrically connected to the control device, and the control device is further configured to adjust an opening degree of the third throttling component according to the suction superheat of the compressor when the air conditioning device operates in the heating mode.

[0013] In the second aspect, an embodiment of the present application provides a control method of an air conditioning device, applied to the air conditioning device of any one of the embodiments of the first aspect, and the control method comprises the following steps: controlling the on-off valve to be in an open state and the first throttling component to be in a closed state in a starting process of the compressor; closing the on-off valve after the starting of the compressor is completed, and acquiring an outdoor environment temperature of the air conditioning device, a discharge temperature and a suction superheat of the compressor in a running process of the compressor; and determining whether to open the first throttling component according to the outdoor environment temperature, the discharge temperature and the suction superheat of the compressor.

[0014] In combination with the second aspect, in some embodiments, the step of determining whether to open the first throttling component according to the outdoor environment temperature, the discharge temperature and the suction superheat of the compressor comprises the following steps: opening the first throttling component when at least one of the following conditions is met, and closing the first throttling component when none of the following conditions is met: the suction superheat of the compressor is less than a preset superheat threshold; the air conditioning device is in a cooling mode, and the outdoor environment temperature is higher than a first temperature threshold; the discharge temperature of the compressor is higher than a third temperature threshold; and the air conditioning device is in a heating mode, and the outdoor environment temperature is lower than a second temperature threshold.

[0015] In combination with the second aspect, in some embodiments, the method further comprises the following step: adjusting an opening degree of the first throttling component according to the outdoor environment temperature of the air conditioning device, the discharge temperature and the suction superheat of the compressor when the first throttling component is in an open state.

[0016] The one or more technical solutions provided by the embodiments of the present application achieve at least the following technical effects or advantages:

[0017] According to the air conditioning equipment provided by the embodiments of the present application, the heat pump unit is provided with an ejector device, the high-pressure inlet of the ejector device is connected to the exhaust port of the compressor through a switch valve and to the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger through a first throttling component, the low-pressure inlet of the ejector device is in communication with the liquid outlet of the gas-liquid separator, and the outlet of the ejector device is connected to the air supplement port of the compressor. The state of the switch valve and the first throttling component can be changed according to whether the compressor is in a starting process or a running process, so that the first throttling component is in a closed state and the switch valve is in an open state in the starting process of the compressor, and the switch valve is in a closed state and the first throttling component is opened as needed in the running process of the compressor. Therefore, the liquid refrigerant separated by the gas-liquid separator can be injected by the ejector device in the starting and running processes of the compressor, so as to solve the technical problem of liquid entrainment in the suction of the compressor in the starting and running processes, avoid damage to the compressor in the starting and running processes, and be beneficial to prolonging the service life of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a schematic diagram of the heat pump unit of the air conditioning equipment in the embodiments of the present application.

[0020] Figure 2 It is a refrigerant circulation schematic diagram of the air conditioning equipment in the embodiments of the present application in a refrigeration working condition and in a starting process of the compressor.

[0021] Figure 3 It is a refrigerant circulation schematic diagram of the air conditioning equipment in the embodiments of the present application in a heating working condition and in a starting process of the compressor.

[0022] Figure 4 It is a refrigerant circulation schematic diagram of the air conditioning equipment in the embodiments of the present application in a refrigeration working condition and in a running process of the compressor when the ejector device is in an enabled state.

[0023] Figure 5 It is a refrigerant circulation schematic diagram of the air conditioning equipment in the embodiments of the present application in a refrigeration working condition and in a running process of the compressor when the ejector device is in a disabled state.

[0024] Figure 6Fig. 1 is a schematic diagram of a refrigerant circulation in a compressor running process of an air conditioning device in a heating condition according to an embodiment of the present application, wherein an ejector is in an enabled state;

[0025] Figure 7 Fig. 2 is a schematic diagram of a refrigerant circulation in a compressor running process of an air conditioning device in a heating condition according to an embodiment of the present application, wherein an ejector is in a disabled state;

[0026] Figure 8 Fig. 3 is a schematic diagram of an internal structure of an ejector shown in Fig. 1; Figures 1-7

[0027] Figure 9 Fig. 4 is a schematic diagram of an electrical connection relationship of a control device of an air conditioning device according to an embodiment of the present application;

[0028] Figure 10 Fig. 5 is a flowchart of a control method of an air conditioning device according to an embodiment of the present application;

[0029] Figure 11 Fig. 6 is a schematic diagram of a structure of a control device according to an embodiment of the present application. Figure 9 DETAILED DESCRIPTION In order to make the purpose, technical solutions and advantages of the present application clearer, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work belong to the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0031] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0032] The embodiments of the present application provide an air conditioning device, as shown in Fig. 1, Figure 1 Figure 1 ​​This is a schematic diagram of a heat pump unit in an air conditioning system according to an embodiment of the present invention. The heat pump unit 100 of the air conditioning system has a refrigerant circulation main loop, on which a compressor 111, an outdoor heat exchanger 112, an indoor heat exchanger 113, and a gas-liquid separator 114 are installed.

[0033] It is understood that the compressor 111 is a gas-injection enthalpy-increasing compressor with an exhaust port a1, an inlet port a2, and a gas-injection port a3. The gas outlet b1 of the gas-liquid separator 114 is connected to the inlet port a2 of the compressor 111. In the outdoor heat exchanger 112 and the indoor heat exchanger 113: the first interface of one heat exchanger is connected to the exhaust port a1 of the compressor 111, the first interface of the other heat exchanger is connected to the inlet b3 of the gas-liquid separator 114, and the second interface of the outdoor heat exchanger 112 and the second interface of the indoor heat exchanger 113 are connected by a refrigerant pipeline.

[0034] In the main refrigerant circulation loop, the compressor exhaust (gas refrigerant) discharged from the exhaust port a1 of compressor 111 undergoes heat exchange through outdoor heat exchanger 112 and indoor heat exchanger 113, and then undergoes gas-liquid separation through gas-liquid separator 114. The separated gas refrigerant then enters compressor 111 through inlet a2 for compression. It should be noted that the order in which the gas refrigerant discharged from compressor 111's exhaust port a1 passes through outdoor heat exchanger 112 and indoor heat exchanger 113 depends on whether the air conditioning unit is cooling or heating; therefore, the order is not specified here.

[0035] At least to solve the technical problem of liquid carryover during the start-up and operation of compressor 111, such as Figure 1 As shown, in this embodiment of the invention, the air conditioning equipment also includes an ejector device 121, a switching valve 122, and a first throttling component 123.

[0036] like Figure 1 As shown, the ejector device 121 has a high-pressure inlet E, a low-pressure inlet F, and an outlet G1. The high-pressure inlet E of the ejector device 121 is connected to the exhaust port a1 of the compressor 111 via a switching valve 122. The high-pressure inlet E of the ejector device 121 is also connected to the refrigerant pipeline between the second interface of the outdoor heat exchanger 112 and the second interface of the indoor heat exchanger 113 via a first throttling component 123. The low-pressure inlet F of the ejector device 121 is connected to the liquid outlet b2 of the gas-liquid separator 114. The outlet G1 of the ejector device 121 is connected to the air supply port a1 of the compressor 111.

[0037] Figure 2 This is a schematic diagram of the refrigerant circulation of the air conditioning equipment under cooling conditions and during the compressor startup process in an embodiment of the present invention. Figure 3 This is a schematic diagram of the refrigerant circulation of the air conditioning unit in heating mode and during compressor startup, as described in an embodiment of the present invention.Figure 2 , Figure 3 As shown, during the startup of compressor 111, the first throttling component 123 is in the closed state, while the switching valve 122 is in the open state. Because the switching valve 122 is open during compressor 111 startup, a portion of the gaseous refrigerant discharged from the compressor 111's exhaust port a1 bypasses the outdoor heat exchanger 112 and indoor heat exchanger 113, instead directly reaching the high-pressure inlet E of the ejector device 121 via the switching valve 122. The liquid refrigerant separated by the gas-liquid separator 114 is then injected into the ejector device 121. After mixing with the compressor 111's exhaust gas in the ejector device 121, the mixture enters the compressor 111 through the air supply port a3 and is compressed. This solves the technical problem of liquid being drawn into the compressor 111 during startup.

[0038] Figure 4 This is a schematic diagram of refrigerant circulation during the operation of the compressor when the air conditioning equipment is in cooling mode and the ejector device is in the activated state, according to an embodiment of the present invention. Figure 5 This is a schematic diagram of refrigerant circulation during the operation of the compressor when the air conditioning equipment is in cooling mode and the ejector device is not in use, according to an embodiment of the present invention. Figure 6 This is a schematic diagram of refrigerant circulation during the operation of the compressor when the air conditioning equipment is in heating mode and the ejector device is in the activated state, according to an embodiment of the present invention. Figure 7 This is a schematic diagram illustrating the refrigerant circulation process during compressor operation in a heating mode, with the ejector device disabled, according to an embodiment of the present invention. Figures 4-7 As shown, during the operation of compressor 111, the switching valve 122 is in the closed state. In some embodiments, the first throttling component 123 may always be in the open state during the operation of compressor 111. In other embodiments, whether the first throttling component 123 is in the open or closed state during the operation of compressor 111 depends on the outdoor ambient temperature, the discharge temperature of compressor 111, and the suction superheat. That is, during the operation of compressor 111, the outdoor ambient temperature, the discharge temperature of compressor 111, and the suction superheat determine whether the ejector device 121 is activated.

[0039] Since the switch valve 122 is in the closed state during the operation of the compressor 111, the gas refrigerant discharged from the discharge port a1 of the compressor 111 can all enter the outdoor heat exchanger 112 or the indoor heat exchanger 113 to be radiated, and cannot directly reach the high-pressure inlet E of the ejector 121. If the first throttling component 123 is in the closed state during the operation of the compressor 111, no refrigerant can enter the ejector 121 during the operation of the compressor 111, and the ejector 121 is in the state of being not enabled. If the first throttling component 123 is in the open state during the operation of the compressor 111, a part of the refrigerant flowing out of the outdoor heat exchanger 112 or the indoor heat exchanger 113 can reach the high-pressure inlet E of the ejector 121 through the first throttling component 123. This part of the refrigerant enters the ejector 121 to inject the liquid refrigerant separated from the gas-liquid separator 114 into the ejector 121, and the two are mixed in the ejector 121 and then enter the compressor 111 from the gas supplement port a3 of the compressor 111 to be compressed.

[0040] According to the air conditioning equipment provided by some embodiments of the present application, if the first throttling component 123 is in the open state during the operation of the compressor 111, a part of the refrigerant flowing out of the outdoor heat exchanger 112 or the indoor heat exchanger 113 can be used to inject the liquid refrigerant separated from the gas-liquid separator 114, so as to solve the technical problem of suction liquid carry-over of the compressor 111 during the operation.

[0041] If whether to open the first throttling component 123 during the operation of the compressor 111 is determined according to the outdoor ambient temperature, the discharge temperature of the compressor 111 and the suction superheat degree, the ejector 121 can be enabled only in the extreme working condition.

[0042] It can be understood that, in the case that the discharge temperature of the compressor 111 is higher than the third temperature threshold, the first throttling component 123 is opened to cope with the technical problem of the excessively high discharge temperature of the compressor 111 in the extreme working condition of the air conditioning equipment, and the operation reliability of the compressor 111 in the extreme working condition is improved.

[0043] It can be understood that, in the case that the suction superheat degree of the compressor 111 is less than the preset superheat degree threshold, the first throttling component 123 is opened to cope with the phenomenon of suction liquid carry-over of the compressor 111 in the operation process due to incomplete evaporation at the outlet of the evaporator in the case of excessively small suction superheat degree, and the compressor 111 is prevented from being damaged.

[0044] It can be understood that the air conditioning equipment is in a refrigeration working condition, and the outdoor environment temperature is higher than the first temperature threshold, the first throttling component 123 is opened; the air conditioning equipment is in a heating working condition, and the outdoor environment temperature is lower than the second temperature threshold, the first throttling component 123 is opened. Thus, the ejector device 121 can be enabled in an extreme refrigeration working condition and an extreme heating working condition. In the extreme heating working condition, the refrigerant flowing out of the outdoor heat exchanger 112 or the indoor heat exchanger 113 is mixed with the liquid refrigerant separated from the gas-liquid separator 114, and then the mixed refrigerant is supplied to the supplement gas port a3 of the compressor 111 to increase the enthalpy, which can effectively improve the heating capacity of the air conditioning equipment in a low-temperature working condition, avoid capacity attenuation, and thus effectively improve the energy efficiency of the heat pump unit. In the extreme refrigeration working condition, the exhaust temperature of the compressor 111 is reduced, the exhaust temperature of the compressor 111 in the extreme refrigeration working condition is prevented from exceeding the high-temperature limit of the compressor 111, and the reliability of the compressor is improved.

[0045] It should be noted that according to the air conditioning equipment provided by the application, when any one of the switch valve 122 and the first throttling component 123 is in an open state, the ejector device 121 enters an enabled state. In the enabled state of the ejector device 121, two paths of refrigerant enter the ejector device 121. The first path of refrigerant is the liquid refrigerant separated from the gas-liquid separator 114 and introduced into the ejector device 121 through the low-pressure inlet F of the ejector device 121. According to whether the compressor 111 is in a starting process or a running process, the source of the second path of refrigerant is different. In the starting process of the compressor 111, the second path of refrigerant is the gaseous refrigerant discharged from the exhaust port a1 of the compressor 111. In the running process of the compressor 111, in a refrigeration working condition, the second path of refrigerant is the refrigerant flowing out of the outdoor heat exchanger 112; in a heating working condition, the second path of refrigerant is the refrigerant flowing out of the indoor heat exchanger 113. When the compressor 111 is just started, the gas-liquid separator 114 has a large amount of liquid accumulation. At this time, the high-pressure exhaust gas discharged from the exhaust port a1 of the compressor 111 is used for injection, the injection efficiency is improved, the liquid in the gas-liquid separator 114 is quickly emptied, and liquid suction is prevented. However, since the injection gas flow is not subjected to heat exchange, the heat exchange efficiency and performance of the whole machine are affected. Therefore, in the normal running process of the compressor 111, the high-pressure liquid passing through the outdoor heat exchanger 112 is used for injection, the injection efficiency is reduced, but the amount of liquid in the gas-liquid separator 114 is relatively small when the compressor 111 is normally running, the amount of liquid matches the injection efficiency, and the use of the high-pressure liquid passing through the outdoor heat exchanger 112 for injection does not affect the efficiency and performance of the whole machine. The present scheme balances the efficiency and performance of the whole machine and the injection efficiency by setting different sources of the second path of refrigerant in the starting process of the compressor 111 and the running process of the compressor 111.

[0046] According to the air conditioning device, the high-pressure inlet E of the ejector device 121 is connected to two different positions on the main loop of the refrigerant circulation through the switch valve 122 and the first throttling component 123, so that the ejector device 121 can selectively communicate with one of the positions according to whether the compressor 111 is in a starting process or a running process, thereby solving the problem of liquid entrainment in the suction of the compressor during the starting and running processes.

[0047] As shown in Figure 9 , the air conditioning device according to the embodiment of the present application can further include a control device 130 electrically connected to the switch valve 122 and the first throttling component 123, and the control device 130 is configured to change the states of the switch valve 122 and the first throttling component 123 according to the operation of the air conditioning device.

[0048] In combination with Figure 2 , Figure 3 , the control device 130 is configured to control the switch valve 122 to be in an open state and the first throttling component 123 to be in a closed state during the starting process of the compressor 111, so that part of the exhaust gas of the compressor 111 enters the ejector device 121 from the high-pressure inlet E of the ejector device 121 through the switch valve 122 during the starting process of the compressor 111, to mix with the liquid refrigerant separated from the gas-liquid separator 114 and then enter the compressor 111 from the air supplement port a3 of the compressor 111.

[0049] In combination with Figures 4-7 , the control device 130 is further configured to control the switch valve 122 to be in a closed state during the running process of the compressor 111, and is further configured to control the first throttling component 123 to be in a closed state during the running process of the compressor 111, or to control the first throttling component 123 to be opened according to the outdoor ambient temperature of the air conditioning device, the exhaust gas temperature of the compressor 111 and the suction superheat during the running process of the compressor 111. When the first throttling component 123 is in an open state, part of the refrigerant flowing out of the outdoor heat exchanger 112 or the indoor heat exchanger 113 enters the ejector device 121 from the high-pressure inlet E of the ejector device 121 through the first throttling component 123, to mix with the liquid refrigerant separated from the gas-liquid separator 114 and then enter the compressor 111 from the outdoor air supplement port a3 of the compressor 111.

[0050] It can be understood that, in order to further improve the operation reliability of the compressor 111 and the energy efficiency of the heat pump unit 100, the control device 130 is further configured to adjust the opening degree of the first throttling component 123 according to the outdoor environment temperature, the discharge temperature of the compressor 111 and the suction superheat after the first throttling component 123 is opened. Wherein, the opening degree adjustment of the first throttling component 123 satisfies the following rule: the higher the discharge temperature of the compressor 111, the higher the outdoor environment temperature in the refrigeration working condition, the lower the outdoor environment temperature in the heating working condition, and the smaller the suction superheat of the compressor 111, the larger the opening degree of the first throttling component 123; otherwise, the smaller the opening degree of the first throttling component 123.

[0051] As shown in Figure 1 , in order to enable the ejector device 121 to supplement the gas and increase the enthalpy of the compressor 111, the ejector device 121 can include an ejector 121a and a subcooling heat exchanger 121b; the subcooling heat exchanger 121b is connected to the main loop of the refrigerant cycle, and the outlet G2 of the ejector 121a is connected to the gas supplement port a3 of the compressor 111 through the subcooling heat exchanger 121b.

[0052] Wherein, the high-pressure inlet and the low-pressure inlet of the ejector 121a correspond to the high-pressure inlet E and the low-pressure inlet F of the ejector device 121, the subcooling heat exchanger 121b has a first heat exchange unit and a second heat exchange unit, the inlet and outlet interfaces of the first heat exchange unit are connected to the refrigerant pipeline between the second interface of the outdoor heat exchanger 112 and the second interface of the indoor heat exchanger 113 on the main loop of the refrigerant cycle, and the inlet and outlet interfaces of the second heat exchange unit are connected in series between the outlet G2 of the ejector 121a and the gas supplement port a3 of the compressor 111. The outlet G2 of the ejector 121a is connected to one interface of the second heat exchange unit, and the other interface of the second heat exchange unit is connected to the gas supplement port a3 of the compressor 111 as the outlet G1 of the ejector device 121. After the two-way refrigerant from the high-pressure inlet E and the low-pressure inlet F is mixed in the ejector 121a, it flows through the subcooling heat exchanger 121b to exchange heat, and then enters the compressor 111 from the gas supplement port a3 of the compressor 111 after the heat exchange.

[0053] Figure 8 As shown in Figures 1-7 , the internal structure of the ejector. As shown in Figure 8 , the internal structure of the ejector 121a can include a receiving chamber, a mixing chamber, a diffusion chamber and a nozzle. The high-pressure fluid (main flow) from the high-pressure inlet E flows out of the nozzle into the receiving chamber at a very high speed to form a jet flow, which produces a suction effect. The high-speed jet flow causes the receiving chamber to generate a negative pressure area, which will suck the low-pressure injection fluid from the low-pressure inlet F into the receiving chamber and mix with the main flow in the mixing chamber, and then complete the speed reduction and pressure increase in the diffusion chamber.

[0054] It can be understood that the air conditioning device in the embodiment of the present application can be a single cold air conditioner, a single warm air conditioner or a cold and warm air conditioner. If it is a single cold air conditioner, the refrigerant circulation loop is that the exhaust port a1 of the compressor 111 is connected in series with the outdoor heat exchanger 112, the indoor heat exchanger 113 and the inlet b3 of the gas-liquid separator 114 in turn, and the gas outlet b1 of the gas-liquid separator 114 is connected to the air inlet a2 of the compressor 111, forming a loop. If it is a single warm air conditioner, the refrigerant circulation loop is that the exhaust port a1 of the compressor 111 is connected to the indoor heat exchanger 113, the outdoor heat exchanger 112 and the inlet b3 of the gas-liquid separator 114 in turn, and the gas outlet b1 of the gas-liquid separator 114 is connected to the air inlet a2 of the compressor 111, forming a loop.

[0055] If the air conditioning device in the embodiment of the present application is a cold and warm air conditioner, as shown in Figure 1 , a four-way reversing valve 115 for changing the flow direction of the refrigerant is further arranged on the main refrigerant circulation loop, four interfaces of the four-way reversing valve 115 are connected to the exhaust port a1 of the compressor 111, the inlet b3 of the gas-liquid separator 114, the first interface of the outdoor heat exchanger 112 and the first interface of the indoor heat exchanger 113 in turn; the second interface of the outdoor heat exchanger 112 is connected to the second interface of the indoor heat exchanger 113. The flow direction of the gas refrigerant discharged from the exhaust port a1 of the compressor 111 is changed by the four-way reversing valve 115, so that the air conditioning device is switched between the refrigeration working condition and the heating working condition.

[0056] Figure 9 The schematic diagram of the electrical connection relationship of the control device of the air conditioning device in the embodiment of the present application is shown in Figure 9 . The control device 130 is electrically connected to the four-way reversing valve 115, and the control device 130 is further used to control the four-way reversing valve 115 to switch between the first communication mode and the second communication mode. As shown in Figure 2 , Figure 4 and Figure 5 , when the four-way reversing valve 115 is in the first communication mode, the air conditioning device operates in the refrigeration working condition; as shown in Figure 3 , Figure 6 and Figure 7 , when the four-way reversing valve 115 is in the second communication mode, the air conditioning device operates in the heating working condition.

[0057] It can be understood that, as shown in Figure 1 and Figure 9As shown, the second throttling component 116 can also be arranged on the main refrigerant circulation loop, and the second throttling component 116 is electrically connected to the control device 130, and the second throttling component 116 is connected to the refrigerant pipeline between the outdoor heat exchanger 112 and the subcooling heat exchanger 121b. The control device 130 is further configured to, in the case that the air conditioning device operates in the cooling mode, adjust the opening degree of the second throttling component 116 according to the suction superheat degree of the compressor 111, so that the suction superheat degree of the compressor 111 meets the target value of the superheat degree.

[0058] It can be understood that, as Figure 1 and Figure 9 shown, the third throttling component 117 can also be arranged on the main refrigerant circulation loop, and the third throttling component 117 is electrically connected to the control device 130, and the third throttling component 117 is connected to the refrigerant pipeline between the indoor heat exchanger 112 and the subcooling heat exchanger 121b; the control device 130 is further configured to, in the case that the air conditioning device operates in the heating mode, adjust the opening degree of the third throttling component 117 according to the suction superheat degree of the compressor 111, so that the suction superheat degree of the compressor 111 meets the target value of the superheat degree.

[0059] The first throttling component 123, the second throttling component 116, and the third throttling component 117 can all be electronic expansion valves, and the four-way reversing valve 115 and the on-off valve 122 can all be solenoid valves. The indoor heat exchanger 113 can be a fin heat exchanger, a micro-channel heat exchanger, or a double-pipe heat exchanger. The outdoor heat exchanger 112 can be a fin heat exchanger, a micro-channel heat exchanger, or a double-pipe heat exchanger. The compressor 111 can be a rotary compressor or a scroll compressor. The compressor 111 can be a single cylinder or multiple cylinders. The subcooling heat exchanger 121b can be a plate heat exchanger.

[0060] It should be understood that, on the basis of the heat pump unit 100 of the air conditioning device as Figure 1 shown, through the control of the control device 130, the air conditioning device can have four different refrigerant circulation conditions to solve the problems existing in the start-up and operation of different air conditioning devices:

[0061] Case I: as Figure 2As shown, the air conditioning device is running in the cooling mode, and during the start-up of the compressor 111, the switch valve 122 is opened, the second throttling component 116 is fully opened, the third throttling component 117 is opened to the third target opening degree so that the suction superheat degree of the compressor 111 meets the target superheat degree, and the first throttling component 123 is closed. The four-way reversing valve 115 is connected between the interfaces A and B and between the interfaces C and D. A part of the high-temperature and high-pressure compressor discharge gas enters the ejector 121a through the switch valve 122, and the liquid refrigerant separated from the gas-liquid separator 114 is injected into the ejector 121a. The liquid refrigerant and the high-temperature and high-pressure compressor discharge gas are mixed in the ejector 121a and then flow through the subcooler 121b to exchange heat. After the heat exchange, the refrigerant enters the compressor 111 through the suction port a3 of the compressor 111 and is compressed. Another part of the high-temperature and high-pressure compressor discharge gas enters the outdoor heat exchanger 112 to exchange heat and becomes high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure liquid refrigerant flows through the subcooler 121b, is throttled and cooled by the third throttling component 117, enters the indoor heat exchanger 113 to exchange heat, absorbs indoor heat, and then enters the gas-liquid separator 114 to complete the gas-liquid separation. The separated gas enters the compressor 111 and is compressed, and the separated liquid refrigerant is stored in the gas-liquid separator 114 and is injected by the ejector 121a.

[0062] Case two: as shown in Figure 4 As shown, the air conditioning device is running in the cooling mode, and during the start-up of the compressor 111, the switch valve 122 is opened, the second throttling component 116 is fully opened, the third throttling component 117 is opened to the third target opening degree so that the suction superheat degree of the compressor 111 meets the target superheat degree, and the first throttling component 123 is closed. The four-way reversing valve 115 is connected between the interfaces A and B and between the interfaces C and D. A part of the high-temperature and high-pressure compressor discharge gas enters the ejector 121a through the switch valve 122, and the liquid refrigerant separated from the gas-liquid separator 114 is injected into the ejector 121a. The liquid refrigerant and the high-temperature and high-pressure compressor discharge gas are mixed in the ejector 121a and then flow through the subcooler 121b to exchange heat. After the heat exchange, the refrigerant enters the compressor 111 through the suction port a3 of the compressor 111 and is compressed. Another part of the high-temperature and high-pressure compressor discharge gas enters the outdoor heat exchanger 112 to exchange heat and becomes high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure liquid refrigerant flows through the subcooler 121b, is throttled and cooled by the third throttling component 117, enters the indoor heat exchanger 113 to exchange heat, absorbs indoor heat, and then enters the gas-liquid separator 114 to complete the gas-liquid separation. The separated gas enters the compressor 111 and is compressed, and the separated liquid refrigerant is stored in the gas-liquid separator 114 and is injected by the ejector 121a.

[0063] Case three: as shown inFigure 5 As shown, the air conditioning device operates in the cooling mode, and during the operation of the compressor 111, if the ejector 121 is not required to be started: the switch valve 122 is closed, the second throttling component 116 is fully opened, the third throttling component 117 is opened to the third target opening degree so that the suction superheat degree of the compressor 111 meets the target superheat degree, and the first throttling component 123 is closed. The four-way reversing valve 115 is connected between the interfaces A and B and between the interfaces C and D. The high-temperature and high-pressure compressor discharge gas enters the outdoor heat exchanger 112 to be cooled to become high-temperature and high-pressure liquid refrigerant, the high-temperature and high-pressure liquid refrigerant flows out of the outdoor heat exchanger 112, passes through the cold heat exchanger 121b, is throttled and cooled by the third throttling component 117, enters the indoor heat exchanger 113 to be heated, and then enters the gas-liquid separator 114 to be separated. The separated gas refrigerant enters the compressor 111 to be compressed.

[0064] Case four: as shown in Figure 3 As shown, the air conditioning device operates in the heating mode, and during the start-up of the compressor 111, at this time, the switch valve 122 is opened, the third throttling component 117 is fully opened, the second throttling component 116 is opened to the second target opening degree so that the suction superheat degree of the compressor 111 meets the target superheat degree, and the first throttling component 123 is closed. The four-way reversing valve 115 is connected between the interfaces A and D and between the interfaces B and C. Part of the high-temperature and high-pressure compressor discharge gas enters the ejector 121a through the switch valve 122 to inject the liquid refrigerant separated from the gas-liquid separator 114 to the ejector 121a, the liquid refrigerant and the high-temperature and high-pressure compressor discharge gas are mixed in the ejector 121a, then flow through the cold heat exchanger 121b to be heated, and then enter the compressor 111 through the gas supplement port a3 of the compressor 111 to be compressed, the other part of the high-temperature and high-pressure compressor discharge gas enters the indoor heat exchanger 113 to be cooled to become high-temperature and high-pressure liquid refrigerant, the high-temperature and high-pressure refrigerant flows through the cold heat exchanger 121b, and then sequentially passes through the second throttling component 116 to be throttled, cooled and decompressed, and enters the outdoor heat exchanger 112 to be heated, absorbs outdoor heat, and then enters the gas-liquid separator 114 to be separated. The separated gas refrigerant enters the compressor 111 to be compressed, and the separated liquid refrigerant is stored in the gas-liquid separator 114 and is injected by the ejector 121a.

[0065] Case five: as shown in Figure 6As shown, the air conditioning unit operates in heating mode. During the operation of compressor 111, if it is necessary to activate ejector device 121: switch valve 122 is closed, third throttling component 117 is fully open, second throttling component 116 is opened to the second target opening degree to ensure the suction superheat of compressor 111 meets the target superheat value, and first throttling component 123 is opened to the first target opening degree to ensure the discharge temperature of compressor 111 meets the target temperature value. Ports A and D of the four-way reversing valve 115 are connected, and ports B and C are connected. The high-temperature, high-pressure compressor discharge enters the indoor heat exchanger 113 for heat dissipation, becoming a high-temperature, high-pressure liquid refrigerant. A portion of the high-temperature, high-pressure liquid refrigerant from the indoor heat exchanger 113 enters the ejector 121a via the first throttling component 123, which then guides the liquid refrigerant separated by the gas-liquid separator 114 to the ejector 121a. After mixing in the ejector 121a, the two refrigerants flow through the cold heat exchanger 121b for heat exchange, and then enter the compressor 111 through the air inlet a3 to be compressed. Another portion of the high-temperature, high-pressure liquid refrigerant from the indoor heat exchanger 113 flows through the cold heat exchanger 121b, then passes through the second throttling component 116 for throttling, cooling, and pressure reduction before entering the outdoor heat exchanger 112 for heat exchange. After absorbing outdoor heat, it enters the gas-liquid separator 114 to complete gas-liquid separation. The separated gaseous refrigerant enters the compressor 111 for compression, while the separated liquid refrigerant is stored in the gas-liquid separator 114 and then ejected by the ejector 121a.

[0066] Scenario 6: For example Figure 7 As shown, the air conditioning equipment operates in heating mode. During the operation of compressor 111, if the ejector device 121 is not required: the switching valve 122 is closed, the third throttling component 117 is fully open, and the second throttling component 116 is opened to the third target opening degree to ensure that the suction superheat of compressor 111 meets the target superheat value. The first throttling component 123 is closed. The ports A and D of the four-way reversing valve 115 are connected, and the ports B and C are connected. All the high-temperature and high-pressure compressor exhaust enters the indoor heat exchanger 113 for heat dissipation, becoming high-temperature and high-pressure liquid refrigerant. After passing through the cold heat exchanger 121b, the high-temperature and high-pressure liquid refrigerant is throttled and cooled and depressurized by the second throttling component 116 and enters the outdoor heat exchanger 113 for heat exchange. After absorbing outdoor heat, it enters the gas-liquid separator 114 to complete gas-liquid separation. The separated gaseous refrigerant enters the compressor 111 and is compressed.

[0067] According to the air conditioning equipment provided by the present invention, the present invention also provides a control method for the air conditioning equipment. Figure 10 This is a flowchart illustrating the control method of an air conditioning device in an embodiment of the present invention, as shown below. Figure 10 As shown, the control method for this air conditioning equipment includes the following steps S101 to S103:

[0068] S101: In the starting process of the compressor 111, the switch valve 122 is controlled to be in the open state and the first throttling component 123 is controlled to be in the closed state;

[0069] S102: After the starting of the compressor 111 is completed, the switch valve 122 is closed, and in the running process of the compressor 111, the outdoor environment temperature where the air conditioning equipment is located, the exhaust temperature of the compressor 111 and the suction superheat degree are obtained.

[0070] S103: Whether to open the first throttling component 123 is determined according to the outdoor environment temperature, the exhaust temperature of the compressor 111 and the suction superheat degree.

[0071] It can be understood that in step S103, whether to open the first throttling component 123 is determined according to the outdoor environment temperature, the exhaust temperature of the compressor 111 and the suction superheat degree, which can be that the first throttling component 123 is opened when at least one of the following conditions ①, ②, ③ and ④ is met, and the first throttling component 123 is closed when none of the following conditions ①, ②, ③ and ④ is met:

[0072] Condition ①: The suction superheat degree of the compressor 111 is less than a preset superheat threshold;

[0073] Condition ②: The air conditioning equipment is in a cooling working condition, and the outdoor environment temperature is higher than a first temperature threshold;

[0074] Condition ③: The air conditioning equipment is in a heating working condition, and the outdoor environment temperature is lower than a second temperature threshold; and

[0075] Condition ④: The exhaust temperature of the compressor 111 is higher than a third temperature threshold.

[0076] For example, the first temperature threshold can be set to 43℃, the second temperature threshold can be set to 15℃. The third temperature threshold can be set to 95℃, and the preset superheat threshold can be set to 2℃. However, the specific values of the thresholds in the specific implementation process are not limited.

[0077] It can be understood that the control method of the air conditioning equipment provided in the embodiment of the application can further include the following steps: in the case that the first throttling component 123 is in the open state, the opening degree of the first throttling component 123 is adjusted to a first target opening degree according to the outdoor environment temperature where the air conditioning equipment is located, the exhaust temperature of the compressor 111 and the suction superheat degree, so that the exhaust temperature of the compressor 111 meets the temperature target value.

[0078] In order to facilitate the understanding of the control method of the air conditioning equipment in the embodiment of the application, the process of how the first throttling component 123 is controlled in the running process of the compressor 111 is described:

[0079] S1: Detects the temperature of the space where the outdoor heat exchanger 112 is located, and records it as the outdoor ambient temperature. It also detects whether the current operating condition of the air conditioning equipment is heating or cooling.

[0080] S2: Based on the current operating conditions of the air conditioning equipment and the outdoor ambient temperature, determine whether it is necessary to open the first throttling component 123 (refer to conditions ② and ③). If yes, proceed to step S5; otherwise, proceed to step S3.

[0081] S3: Detect the exhaust temperature of compressor 111 and determine whether the first throttling component 123 needs to be opened based on the exhaust temperature (refer to condition ④). If yes, proceed to step S5; otherwise, proceed to step S4.

[0082] S4: Detect the suction superheat of compressor 111, and determine whether the first throttling component 123 needs to be opened based on the suction superheat (refer to condition ①). If so, proceed to step S5.

[0083] S5: Open the first throttling component 123, and after opening the first throttling component 123, adjust the opening degree of the first throttling component 123 according to the exhaust temperature, intake superheat, and outdoor ambient temperature. When the exhaust temperature, intake superheat, and outdoor ambient temperature of the compressor 111 are not satisfied, close the first throttling component 123.

[0084] Understandably, reference Figure 11 As shown, Figure 11 for Figure 9 The schematic diagram of the control device shows that the control device 130 of the air conditioning equipment may include: a memory 1304, a processor 1302, and a computer program stored in the memory 1304 and executable on the processor 1302. When the processor 1302 executes the program, it implements the control method of the air conditioning equipment according to any embodiment of the present invention.

[0085] Among them, Figure 11In particular embodiments, a bus architecture, represented generally by the bus 1300, can include any number of interconnecting buses and bridges, the bus 1300 linking together various circuits such as one or more processors represented by the processor 1302, and memory represented by the memory 1304. The bus 1300 can also link together various other circuits which can include, among other things, peripheral devices, voltage stabilizers and power management circuits, all of which are well known in the art, and therefore, will not be further described herein. The bus interface 1305 provides an interface between the bus 1300 and the receiver 1301 and the transmitter 1303. The receiver 1301 and the transmitter 1303 can be the same component, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 1302 is responsible for managing the bus 1300 and general processing, while the memory 1304 can be used for storing data used by the processor 1302 in executing operational programs.

[0086] Although a few embodiments of the application have been described in detail, modifications and alterations are possible without departing from the scope and spirit of the application. It is therefore intended that the appended claims encompass all such modifications and alterations as fall within the scope of the present application.

[0087] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. An air conditioning apparatus characterized by comprising: The heat pump unit of the air conditioning equipment comprises a refrigerant circulation main circuit, wherein a compressor, an outdoor heat exchanger, an indoor heat exchanger and a gas-liquid separator are arranged on the refrigerant circulation main circuit, and the compressor has a gas supplement port; The heat pump unit further comprises an ejector device, a switch valve and a first throttling component, the high-pressure inlet of the ejector device is connected with the exhaust port of the compressor through the switch valve and is connected with the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger through the first throttling component, the low-pressure inlet of the ejector device is communicated with the liquid outlet of the gas-liquid separator, and the outlet of the ejector device is connected with the gas supplement port; In the starting process of the compressor, the first throttling component is in a closed state and the switch valve is in an open state, and in the running process of the compressor, the switch valve is in a closed state.

2. The air conditioning apparatus of claim 1, wherein The control device is electrically connected with the switch valve and the first throttling component, and is used for: In the starting process of the compressor, the switch valve is controlled to be in an open state and the first throttling component is controlled to be in a closed state, so that part of the exhaust gas of the compressor enters the ejector device through the switch valve, and the liquid refrigerant separated from the gas-liquid separator is injected into the ejector device for mixing and then enters the compressor from the gas supplement port.

3. The air conditioning apparatus of claim 2, wherein The control device is further used for: In the running process of the compressor, the switch valve is controlled to be in a closed state and the first throttling component is controlled to be in an open state, so that part of the refrigerant flowing out of the outdoor heat exchanger or the indoor heat exchanger enters the ejector device through the first throttling component, and the liquid refrigerant separated from the gas-liquid separator is injected into the ejector device for mixing and then enters the compressor from the gas supplement port.

4. The air conditioning apparatus of claim 2, wherein The control device is further used for: In the running process of the compressor, the switch valve is controlled to be in a closed state, and whether the first throttling component is opened is determined according to the outdoor environment temperature, the exhaust gas temperature of the compressor and the suction gas superheat degree; In the case that the first throttling component is in an open state, part of the refrigerant flowing out of the outdoor heat exchanger or the indoor heat exchanger enters the ejector device through the first throttling component, the liquid refrigerant separated from the gas-liquid separator is injected into the ejector device for mixing and then enters the compressor from the gas supplement port.

5. The air conditioning apparatus of claim 4, wherein The control device is further used for: After the first throttling component is opened, the opening degree of the first throttling component is adjusted according to the outdoor environment temperature, the exhaust gas temperature of the compressor and the suction gas superheat degree.

6. The air conditioning apparatus according to any one of claims 2 to 5, wherein The ejector device comprises: an ejector, wherein the high-pressure inlet of the ejector corresponds to the high-pressure inlet of the ejector device, and the low-pressure inlet of the ejector corresponds to the low-pressure inlet of the ejector device; The supercooling heat exchanger has a first heat exchange unit and a second heat exchange unit, the first heat exchange unit is connected to a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, an outlet of the ejector is connected to an interface of the second heat exchange unit, and another interface of the second heat exchange unit is connected to the air supplementing port as an outlet of the injection device.

7. The air conditioning apparatus according to claim 6, wherein A four-way reversing valve is further arranged on the refrigerant circulation main loop; Four interfaces of the four-way reversing valve are correspondingly connected to an exhaust port of the compressor, an inlet of the gas-liquid separator, a first interface of the outdoor heat exchanger, and a first interface of the indoor heat exchanger, and a second interface of the outdoor heat exchanger is connected to a second interface of the indoor heat exchanger; The four-way reversing valve is electrically connected to the control device, and the control device is further used for: controlling the four-way reversing valve to switch between a first communication mode and a second communication mode, wherein the four-way reversing valve in the first communication mode makes the air conditioning equipment operate in a cooling condition, and the four-way reversing valve in the second communication mode makes the air conditioning equipment operate in a heating condition.

8. The air conditioning apparatus of claim 7, wherein A second throttling component is further arranged on the refrigerant circulation main loop; The second throttling component is connected to a refrigerant pipeline between the outdoor heat exchanger and the first heat exchange unit of the supercooling heat exchanger, and the second throttling component is in an open state in the cooling condition of the air conditioning equipment; The second throttling component is electrically connected to the control device, and the control device is further used for: adjusting an opening degree of the second throttling component according to a suction superheat degree of the compressor when the air conditioning equipment operates in the cooling condition.

9. The air conditioning apparatus of claim 7, wherein A third throttling component is further arranged on the refrigerant circulation main loop; The third throttling component is connected to a refrigerant pipeline between the indoor heat exchanger and the supercooling heat exchanger, and the third throttling component is in an open state in the cooling condition of the air conditioning equipment; The third throttling component is electrically connected to the control device, and the control device is further used for: adjusting an opening degree of the third throttling component according to a suction superheat degree of the compressor when the air conditioning equipment operates in the heating condition.

10. A control method of an air conditioning apparatus applied to the air conditioning apparatus according to any one of claims 1 to 9, characterized by, The control method comprises: In a starting process of the compressor, the switch valve is controlled to be in an open state and the first throttling component is controlled to be in a closed state; After the starting of the compressor is completed, the switch valve is closed, and in an operating process of the compressor, an outdoor environment temperature of the air conditioning equipment, an exhaust temperature of the compressor, and a suction superheat degree of the compressor are acquired; Whether the first throttling component is opened is determined according to the outdoor environment temperature, the exhaust temperature of the compressor, and the suction superheat degree of the compressor.

11. The method of claim 10, wherein, The determination of whether the first throttling component is opened according to the outdoor environment temperature, the exhaust temperature of the compressor, and the suction superheat degree of the compressor comprises: The first throttling component is opened when at least one of the following conditions is met, and the first throttling component is closed when all of the following conditions are not met: The suction superheat degree of the compressor is less than a preset superheat threshold; The air conditioning equipment is in the cooling condition, and the outdoor environment temperature is higher than a first temperature threshold; and The air conditioning equipment is in the heating condition, and the suction superheat degree of the compressor is greater than a second temperature threshold. The air conditioning apparatus is in a heating operating mode, and an outdoor ambient temperature is lower than a second temperature threshold; and An exhaust temperature of the compressor is higher than a third temperature threshold.

12. The method of claim 10, wherein, Further comprising: In a case where the first throttling component is in an open state, adjusting an opening degree of the first throttling component according to an outdoor ambient temperature where the air conditioning apparatus is located, the exhaust temperature of the compressor, and a suction superheat. In a case where the first throttling component is in an open state, adjusting an opening degree of the first throttling component according to an outdoor ambient temperature where the air conditioning apparatus is located, the exhaust temperature of the compressor, and a suction superheat.

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