Air conditioning system

Abstract

The air conditioning system comprises a first heat exchanger, a second heat exchanger and a first flow path switching assembly, and the first flow path switching assembly comprises a first inlet, a first outlet and a second outlet; an exhaust port of a compressor of the air-conditioning system is connected with the first inlet, a first outlet is connected with a first pipe orifice of the first heat exchanger, a second pipe orifice of the first heat exchanger is connected with a third pipe orifice of the second heat exchanger through the throttling assembly, and a fourth pipe orifice of the second heat exchanger is connected with the second outlet. The first outlet is further connected to an air inlet of the compressor, and the second outlet is further connected to the air inlet of the compressor; the first flow path switching assembly has two communication states, and when the first flow path switching assembly communicates with the first inlet and the first outlet, a first refrigerant loop is formed; when the first flow path switching assembly communicates with the first inlet and the second outlet, a second refrigerant loop is formed. The first refrigerant loop and the second refrigerant loop are switched through the first flow path switching assembly, so that the indoor environment is not affected when frosting dust removal is executed.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioner control, and in particular to an air conditioning system. Background Art

[0002] After the air conditioner has been working for a long time, dust may accumulate in both the outdoor unit's heat exchanger and the indoor unit's heat exchanger. When the dust accumulation on the heat exchanger exceeds a certain level, it will seriously affect the heat exchange effect of the heat exchanger, causing the air conditioner's cooling or heating effect to decrease. Therefore, it is necessary to clean the dust on the heat exchanger regularly.

[0003] In the related art, the dust on the condenser is cleaned by frosting the condenser and then defrosting it. This solution requires the outdoor unit and the indoor unit to work together. For example, the air conditioner needs to first enter the heating mode to allow the outdoor unit heat exchanger to frost, and then the indoor unit heats the indoor environment. Then it switches to the cooling mode to allow the outdoor unit heat exchanger to defrost, and then the indoor unit cools the indoor environment. The alternating hot and cold modes of the air conditioner obviously affect the user experience. Utility Model Content

[0004] An embodiment of the present application provides an air conditioning system that can perform frosting and dust removal without affecting the indoor environment.

[0005] In a first aspect, an embodiment of the present application provides an air conditioning system, comprising a first heat exchanger, a second heat exchanger, and a first flow path switching component, wherein the first flow path switching component comprises a first inlet, a first outlet, and a second outlet;

[0006] The exhaust port of the compressor of the air conditioning system is connected to the first inlet, the first outlet is connected to the first pipe port of the first heat exchanger, the second pipe port of the first heat exchanger is connected to the third pipe port of the second heat exchanger through a throttling assembly, and the fourth pipe port of the second heat exchanger is connected to the second outlet; the first outlet is also connected to the air inlet of the compressor, and the second outlet is also connected to the air inlet of the compressor;

[0007] The first flow path switching component has two connection states:

[0008] When the first flow path switching component is connected to the first inlet and the first outlet, the exhaust port of the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the air inlet of the compressor form a first refrigerant circuit;

[0009] When the first flow path switching component connects the first inlet and the second outlet, the exhaust port of the compressor, the second heat exchanger, the throttling component, the first heat exchanger and the air inlet of the compressor form a second refrigerant circuit.

[0010] In some embodiments, an ejector is also included, the first inlet is also connected to the nozzle of the ejector, the first pipe opening and the fourth pipe opening are both connected to the ejected port of the ejector, and the diffuser of the ejector is connected to the air intake of the compressor.

[0011] In some embodiments, the refrigerant pipeline connecting the exhaust port of the compressor and the first inlet is provided with a first stop valve, and the refrigerant pipeline connecting the first inlet and the nozzle of the ejector is provided with a second stop valve.

[0012] In some embodiments, the air conditioning system further comprises a second flow path switching assembly, the second flow path switching assembly comprising a second inlet, a third outlet and a fourth outlet; the first pipe port is connected to the second inlet, the third outlet is connected to the ejected port of the ejector, and the fourth outlet is connected to the indoor heat exchanger of the air conditioning system;

[0013] The second flow path switching component has two connection states:

[0014] When the second flow path switching component is connected to the second inlet and the third outlet, the first pipe port is connected to the ejected port of the ejector through the second flow path switching component;

[0015] When the second flow path switching component is connected to the second inlet and the fourth outlet, the first pipe port is connected to the indoor heat exchanger through the second flow path switching component.

[0016] In some embodiments, the air conditioning system further comprises a four-way valve, and the second outlet is connected to the ejected port of the ejector through the four-way valve.

[0017] In some embodiments, the second pipe opening and the third pipe opening are further connected via a direct refrigerant pipe;

[0018] The directly connected refrigerant pipe is provided with a third stop valve;

[0019] Alternatively, the air-conditioning system also includes a third flow path switching component, the third flow path switching component includes a third inlet, a fifth outlet and a sixth outlet, the third inlet is connected to the third pipe opening, the fifth outlet is connected to the second pipe opening through the throttling component, and the sixth outlet is connected to the second pipe opening through the direct-connected refrigerant pipe.

[0020] In some embodiments, the air conditioning system further includes a four-way valve and an indoor heat exchanger, the four-way valve is connected to the indoor heat exchanger, and a fourth stop valve is provided in the refrigerant pipeline connecting the four-way valve and the indoor heat exchanger.

[0021] In some embodiments, a first temperature sensor and a second temperature sensor are further included, wherein the first temperature sensor is used to detect the temperature of the first heat exchanger, and the second temperature sensor is used to detect the temperature of the second heat exchanger.

[0022] In some embodiments, the air conditioning system further comprises a liquid storage tank, an inlet of the liquid storage tank is connected to the diffuser of the ejector, and an outlet of the liquid storage tank is connected to the air inlet of the compressor.

[0023] In some embodiments, the first flow path switching component is a three-way valve.

[0024] The air-conditioning system of the embodiment of the present application has at least the following beneficial effects: the embodiment of the present application arranges the first heat exchanger and the second heat exchanger in the outdoor unit, and arranges the exhaust port of the compressor to be connected to the first heat exchanger and the second heat exchanger respectively through the first outlet and the second outlet of the first flow path switching component, and the first heat exchanger and the second heat exchanger are connected through the throttling component. Therefore, when the air-conditioning system needs frosting and dust removal, the first heat exchanger and the second heat exchanger can be frosted and dust removed respectively through the first flow path switching component, that is, under the first refrigerant circuit, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor enters the first heat exchanger to release heat and then absorbs heat and frosts in the second heat exchanger, and then switches to the second refrigerant circuit, and the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor enters the second heat exchanger to release heat for defrosting and dust removal, and then absorbs heat and frosts in the first heat exchanger, and so on alternately. In the above manner, the first heat exchanger and the second heat exchanger take turns as condensers and evaporators, without the participation of the indoor unit, and can not affect the indoor environment in the frosting and dust removal mode, thereby improving the user experience.

[0025] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural schematic diagram of an air conditioning system provided in an embodiment of the present application;

[0027] Figure 2 is a refrigerant flow diagram of a first refrigerant circuit of an air-conditioning system provided in an embodiment of the present application;

[0028] Figure 3 It is a refrigerant flow diagram of the second refrigerant circuit of the air-conditioning system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the characteristics, operations or features described in the specification can be combined in any appropriate manner to form various implementation methods. At the same time, the steps or actions in the method description can also be replaced or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the accompanying drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0030] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0032] After long-term operation of the air conditioner, dust may accumulate in both the outdoor and indoor heat exchangers. When the dust accumulation on the heat exchanger exceeds a certain level, it will seriously affect the heat exchange effect of the heat exchanger, resulting in a decrease in the cooling or heating effect of the air conditioner. If the heat exchanger accumulates dust for a long time, it may even cause the air conditioner to not work properly. Therefore, it is necessary to clean the dust on the heat exchanger regularly.

[0033] In the related art, most of the dust removal schemes for air conditioner heat exchangers are manually cleaning the heat exchangers regularly, which is troublesome to operate and increases labor costs, and the dust removal efficiency is low. Alternatively, the dust removal scheme for the heat exchanger is to clean the dust on the condenser by frosting the condenser and then defrosting it. This scheme requires the outdoor unit and the indoor unit to be linked to each other. For example, the air conditioner needs to enter the heating mode first to make the outdoor heat exchanger frost, at which time the indoor unit heats the indoor environment, and then switch to the cooling mode to make the outdoor heat exchanger defrost, at which time the indoor unit cools the indoor environment. The alternating hot and cold of the air conditioner obviously affects the user experience. It is understandable that in order to make the outdoor heat exchanger frost, this scheme requires refrigerant to take away the heat of the outdoor heat exchanger. Since the outdoor unit and the indoor unit are linked, the heat of the outdoor heat exchanger can only be released by the indoor unit, which will cause the indoor unit to heat up, causing the room temperature to rise, affecting the user experience.

[0034] Based on this, an embodiment of the present application provides an air-conditioning system, in which a first heat exchanger and a second heat exchanger are arranged on an outdoor unit, and the exhaust port of the compressor is arranged to be connected to the first heat exchanger and the second heat exchanger respectively through the first outlet and the second outlet of the first flow path switching component, and the first heat exchanger and the second heat exchanger are connected through a throttling component. Therefore, when the air-conditioning system needs frosting and dust removal, the first heat exchanger and the second heat exchanger can be frosted and dust removed respectively through the first flow path switching component, that is, under the first refrigerant circuit, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor enters the first heat exchanger to release heat and then absorbs heat and frosts in the second heat exchanger, and then switches to the second refrigerant circuit, and the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor enters the second heat exchanger to release heat for defrosting and dust removal, and then absorbs heat and frosts in the first heat exchanger, and so on alternately. In the above manner, the first heat exchanger and the second heat exchanger take turns as a condenser and an evaporator, without the participation of the indoor unit, and can not affect the indoor environment in the frosting and dust removal mode, thereby improving the user experience.

[0035] The air conditioning system will be described below with reference to the accompanying drawings.

[0036] Reference Figure 1 As shown, Figure 1 : is a structural schematic diagram of an air-conditioning system provided in an embodiment of the present application, wherein the air-conditioning system comprises a first flow path switching component 1, a first heat exchanger 2, and a second heat exchanger 3, wherein the first flow path switching component 1 comprises a first inlet, a first outlet, and a second outlet; an exhaust port of a compressor 5 of the air-conditioning system is connected to the first inlet of the first flow path switching component 1, a first outlet of the first flow path switching component 1 is connected to a first pipe opening of the first heat exchanger 2, a second pipe opening of the first heat exchanger 2 is connected to a third pipe opening of the second heat exchanger 3 through a throttling component 4, and a fourth pipe opening of the second heat exchanger 3 is connected to a second outlet; the first outlet is also connected to an air inlet of the compressor 5, and the second outlet is also connected to an air inlet of the compressor 5; the first flow path switching component has two connection states:

[0037] The first connection state: when the first flow path switching component 1 connects the first inlet and the first outlet, the exhaust port of the compressor 5, the first heat exchanger 2, the throttling component 4, the second heat exchanger 3 and the air inlet of the compressor 5 form a first refrigerant circuit; the first flow path switching component 1 connects the first inlet and the second outlet, the exhaust port of the compressor 5, the second heat exchanger 3, the throttling component 4, the first heat exchanger 2 and the air inlet of the compressor 5 form a second refrigerant circuit.

[0038] In some embodiments of the present application, high-temperature and high-pressure refrigerant flows out from the exhaust port of the compressor 5. When the first flow path switching component 1 connects the first inlet and the first outlet, the high-temperature and high-pressure refrigerant flows through the first inlet of the first flow path switching component 1 and flows out from the first outlet of the first flow path switching component 1, so that the high-temperature and high-pressure refrigerant flows through the first pipe port of the first heat exchanger 2 and then flows into the first heat exchanger 2. The high-temperature and high-pressure refrigerant releases heat in the first heat exchanger 2 to achieve heat exchange, so that the temperature of the refrigerant is reduced. The medium-temperature refrigerant flows out from the second pipe port of the first heat exchanger 2 and flows through the throttling component 4. The throttling component 4 converts the medium-temperature refrigerant into a low-temperature refrigerant, further reducing the temperature of the refrigerant. The low-temperature refrigerant flows out from the throttling component 4 and flows into the second heat exchanger 3 through the third pipe port of the second heat exchanger 3. The low-temperature refrigerant absorbs heat and frosts in the second heat exchanger 3. The refrigerant flows out from the fourth pipe port of the second heat exchanger 3 and then flows back to the air inlet of the compressor 5. Refer to Figure 2 , Figure 2 It is a refrigerant flow diagram of the first refrigerant circuit of the air-conditioning system provided in an embodiment of the present application. It can be understood that when the first flow path switching component 1 connects the first inlet and the first outlet, the high-temperature and high-pressure refrigerant flows out from the exhaust port of the compressor 5 and forms a first refrigerant circuit of the exhaust port of the compressor 5-the first heat exchanger 2-the throttling component 4-the second heat exchanger 3-the air inlet of the compressor 5.

[0039] The second connection state: when the first flow path switching component 1 connects the first inlet and the second outlet, the high-temperature and high-pressure refrigerant flows out from the exhaust port of the compressor 5 and flows through the first inlet of the first flow path switching component 1, and flows out from the second outlet of the first flow path switching component 1 and flows to the second heat exchanger 3, and flows into the second heat exchanger 3 through the fourth pipe port of the second heat exchanger 3. The high-temperature and high-pressure refrigerant releases heat in the second heat exchanger 3 to achieve heat exchange, so that the temperature of the refrigerant is reduced. The medium-temperature refrigerant flows out from the third pipe port of the second heat exchanger 3 and flows through the throttling component 4. The throttling component 4 converts the medium-temperature refrigerant into a low-temperature refrigerant, further reducing the temperature of the refrigerant. The low-temperature refrigerant flows out from the throttling component 4 and flows into the first heat exchanger 2 through the second pipe port of the first heat exchanger 2. The low-temperature refrigerant absorbs heat and frosts in the first heat exchanger 2. The refrigerant flows out from the first pipe port of the first heat exchanger 2 and flows back to the air inlet of the compressor 5. Refer to Figure 3 , Figure 3 It is a refrigerant flow diagram of the second refrigerant circuit of the air-conditioning system provided in an embodiment of the present application. It can be understood that when the first flow path switching component 1 is connected to the first inlet and the second outlet, the high-temperature and high-pressure refrigerant flows out from the exhaust port of the compressor 5 and forms a second refrigerant circuit of the exhaust port of the compressor 5-the second heat exchanger 3-the throttling component 4-the first heat exchanger 2-the air inlet of the compressor 5.

[0040] In the present application, a first heat exchanger 2 and a second heat exchanger 3 are arranged in the outdoor unit, and the exhaust port of the compressor 5 is arranged to be connected to the first heat exchanger 2 and the second heat exchanger 3 respectively through the first outlet and the second outlet of the first flow path switching component 1, and the first heat exchanger 2 and the second heat exchanger 3 are connected through the throttling component 4. Therefore, when the air-conditioning system needs frosting and dust removal, the first heat exchanger 2 and the second heat exchanger 3 can be frosted and dust removed respectively through the first flow path switching component 1, that is, under the first refrigerant circuit, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the first heat exchanger 2 to release heat and then absorbs heat and frosts in the second heat exchanger 3, and then switches to the second refrigerant circuit, and the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the second heat exchanger 3 to release heat for defrosting and dust removal, and then absorbs heat and frosts in the first heat exchanger 2, and so on alternately. In the above manner, the first heat exchanger 2 and the second heat exchanger 3 take turns as a condenser and an evaporator, so that the outdoor unit of the air-conditioning system can independently perform frosting and dust removal without the participation of the indoor unit, and can not affect the indoor environment in the frosting and dust removal mode, thereby improving the user experience.

[0041] It should be noted that, in some embodiments of the present application, the throttling component 4 is an electronic expansion valve, and the refrigerant flowing out of the second pipe port of the first heat exchanger 2 flows to the third pipe port of the second heat exchanger 3 after passing through the electronic expansion valve, and flows into the second heat exchanger 3 through the third pipe port of the second heat exchanger 3. The electronic expansion valve changes the high-pressure refrigerant into a low-pressure refrigerant and produces a small amount of flash gas. The electronic expansion valve plays a role in regulating the refrigerant flow and reducing the refrigerant pressure, so that the pressure of the refrigerant entering the third pipe port of the second heat exchanger 3 becomes lower, thereby reducing the boiling point of the refrigerant entering the second heat exchanger 3, and thus reducing the heat required to be absorbed by the second heat exchanger 3 when frosting. Those skilled in the art can set the type of the throttling component 4 according to actual conditions, and the embodiment of the present application does not limit the type of the throttling component 4.

[0042] In some embodiments of the present application, the first flow path switching component 1 is a three-way valve, which is used to change the flow direction of the refrigerant. The three-way valve includes an inlet and two outlets. When the three-way valve is working, the inlet of the three-way valve is open. When the three-way valve is connected to the inlet and the first outlet, the refrigerant flows into the three-way valve from the inlet and flows out of the three-way valve through the first outlet. The second outlet of the three-way valve is in a bypass state, and the refrigerant does not pass through the second outlet; when the three-way valve is connected to the inlet and the second outlet, the refrigerant flows into the three-way valve from the inlet and flows out of the three-way valve through the second outlet. The first outlet of the three-way valve is in a bypass state, and the refrigerant does not pass through the first outlet, thereby changing the flow direction of the refrigerant. It can be understood that when the three-way valve is connected to the inlet and the first outlet, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the first heat exchanger 2 to release heat and then absorbs heat and frosts in the second heat exchanger 3. When the three-way valve is connected to the inlet and the second outlet, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the second heat exchanger 3 to release heat and defrost and dust, and then absorbs heat and frosts in the first heat exchanger 2. Therefore, the present application alternately changes the outlet valve direction of the three-way valve so that the first heat exchanger 2 and the second heat exchanger 3 act as a condenser and evaporator in turn, so that the indoor unit or outdoor unit of the air-conditioning system can independently perform frost and dust removal without the participation of the indoor unit. It can improve the user experience by not affecting the indoor environment in the frost and dust removal mode.

[0043] In some embodiments of the present application, the air-conditioning system includes a first flow path switching component 1, a first heat exchanger 2 and a second heat exchanger 3, the first flow path switching component 1 includes a first inlet, a first outlet and a second outlet; the air-conditioning system also includes an ejector 6, the first inlet of the first flow path switching component 1 is also connected to the nozzle of the ejector 6, the first pipe opening of the first heat exchanger 2 and the fourth pipe opening of the second heat exchanger 3 are both connected to the ejected port of the ejector 6, and the diffuser of the ejector 6 is connected to the air inlet of the compressor 5.

[0044] In the present application, a first heat exchanger 2 and a second heat exchanger 3 are set as outdoor heat exchangers of the air-conditioning system. Since the outdoor heat exchangers include two or more, in order to prevent the refrigerant deposited in the outdoor heat exchanger from flowing back to the air inlet of the compressor 5 and causing liquid hammer of the compressor 5, an ejector 6 is set in the air-conditioning system in the present application. The ejector 6 is set between the outdoor heat exchanger and the air inlet of the compressor 5. Through the ejector 6, part of the high-pressure refrigerant and the low-pressure refrigerant in the outdoor heat exchanger are fully mixed to form a mixed refrigerant, thereby preventing the deposited refrigerant in the outdoor heat exchanger from damaging the compressor 5 and improving the service life of the compressor 5.

[0045] In one embodiment of the present application, the first inlet of the first flow path switching component 1 is connected to the nozzle of the ejector 6, so that part of the high-temperature and high-pressure refrigerant flowing through the first inlet of the first flow path switching component 1 flows through the nozzle of the ejector 6 and enters the ejector 6; the first pipe opening of the first heat exchanger 2 and the fourth pipe opening of the second heat exchanger 3 are both connected to the ejected port of the ejector 6, so that the refrigerant deposited in the first heat exchanger 2 flows through the ejected port of the ejector 6 through the first pipe opening and enters the ejector 6, and the refrigerant deposited in the second heat exchanger 3 flows through the ejected port of the ejector 6 through the fourth pipe opening and enters the ejector 6; the diffuser of the ejector 6 is connected to the air inlet of the compressor 5, and the high-temperature and high-pressure refrigerant in the ejector 6 and the refrigerant deposited in the first heat exchanger 2 and the refrigerant deposited in the second heat exchanger 3 are fully mixed in the diffuser to form a mixed refrigerant, thereby preventing the deposited refrigerant in the outdoor heat exchanger from damaging the compressor 5 and improving the service life of the compressor 5.

[0046] Reference Figure 1 As shown, the air-conditioning system includes a first flow path switching component 1, a first heat exchanger 2 and a second heat exchanger 3. The air-conditioning system also includes an ejector 6. The exhaust port of the compressor 5 is also connected to the nozzle of the ejector 6. The first pipe port of the first heat exchanger 2 and the fourth pipe port of the second heat exchanger 3 are both connected to the ejected port of the ejector 6. The diffuser of the ejector 6 is connected to the air inlet of the compressor 5. The exhaust port of the compressor 5 is connected to the nozzle of the ejector 6, so that part of the high-temperature and high-pressure refrigerant discharged from the exhaust port of the compressor 5 flows through the nozzle of the ejector 6 and enters the ejector 6; the first pipe port of the first heat exchanger 2 and the fourth pipe port of the second heat exchanger 3 are both connected to the ejected port of the ejector 6, so that the refrigerant deposited in the first heat exchanger 2 flows through the ejected port of the ejector 6 through the first pipe port and enters the ejector 6, and the refrigerant deposited in the second heat exchanger 3 flows through the ejected port of the ejector 6 through the fourth pipe port and enters the ejector 6; the diffuser of the ejector 6 is connected to the air inlet of the compressor 5, and the high-temperature and high-pressure refrigerant in the ejector 6 and the refrigerant deposited in the first heat exchanger 2 and the refrigerant deposited in the second heat exchanger 3 are fully mixed in the diffuser to form a mixed refrigerant, thereby preventing the deposited refrigerant in the outdoor heat exchanger from damaging the compressor 5 and improving the service life of the compressor 5.

[0047] In some embodiments of the present application, the air-conditioning system also includes a first stop valve 7 and a second stop valve 8, the refrigerant pipeline connecting the exhaust port of the compressor 5 and the first inlet e of the first flow path switching component 1 is provided with the first stop valve 7, and the refrigerant pipeline connecting the first inlet e of the first flow path switching component 1 and the nozzle of the ejector 6 is provided with the second stop valve 8.

[0048] By providing a first stop valve 7 on the refrigerant pipeline connected to the first inlet e of the first flow path switching component 1 at the exhaust port of the compressor 5, when the air conditioning system needs to perform frosting and dust removal, the first stop valve 7 is in an open state, and the high-temperature and high-pressure refrigerant flowing out of the exhaust port of the compressor 5 passes through the first flow path switching component 1, and can be frosted and dusted on the first heat exchanger 2 and the second heat exchanger 3 respectively through the first flow path switching component 1; when the air conditioning system does not need to perform frosting and dust removal, the first stop valve 7 is in a closed state, and the high-temperature and high-pressure refrigerant flowing out of the exhaust port of the compressor 5 does not pass through the first flow path switching component 1. In the present application, the first stop valve 7 is provided on the refrigerant pipeline connected to the exhaust port of the compressor 5 and the first inlet e of the first flow path switching component 1, so that the air conditioning system can work normally and the first stop valve 7 is in a closed state when frosting and dust removal is not required, effectively preventing the refrigerant from flowing into the first flow path switching component 1 when the air conditioning system is working normally, thereby preventing the refrigerant from frosting and dust removal on the first heat exchanger 2 and the second heat exchanger 3 respectively through the first flow path switching component 1, thereby improving the user experience.

[0049] A second stop valve 8 is provided through the refrigerant pipeline connecting the first inlet e of the first flow path switching component 1 and the nozzle of the ejector 6. When the air-conditioning system needs to perform frosting and dust removal, the second stop valve 8 is opened, and the refrigerant flowing through the first inlet e of the first flow path switching component 1 flows to the nozzle of the ejector 6 after passing through the second stop valve 8. The refrigerant flows into the ejector 6 through the nozzle of the ejector 6. When the air-conditioning system does not need to perform frosting and dust removal, the second stop valve 8 is closed.

[0050] In one embodiment, when the air-conditioning system needs to be frosted and dust-removed, the first stop valve 7 is opened and the second stop valve 8 is opened, and part of the high-temperature and high-pressure refrigerant flowing out of the exhaust port of the compressor 5 flows through the first stop valve 7 and then flows to the first inlet e of the first flow path switching component 1, and the first heat exchanger 2 and the second heat exchanger 3 are frosted and dust-removed respectively through the first flow path switching component 1, that is, under the first refrigerant circuit, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the first heat exchanger 2 to release heat, and then absorbs heat and frosts in the second heat exchanger 3, and then switches to the second refrigerant circuit, and the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the second heat exchanger 3 to release heat and defrost and dust-removal, and then absorbs heat and frosts in the first heat exchanger 2, and so on alternately. In the above manner, the first heat exchanger 2 and the second heat exchanger 3 take turns as condensers and evaporators, without the participation of the indoor unit, and can not affect the indoor environment in the frosting and dust removal mode, thereby improving the user experience. Another part of the high-temperature and high-pressure refrigerant flowing out of the exhaust port of the compressor 5 flows through the second stop valve 8 and then flows to the nozzle of the ejector 6, and flows into the ejector 6 through the nozzle. Since the first pipe port of the first heat exchanger 2 and the fourth pipe port of the second heat exchanger 3 are both connected to the ejected port of the ejector 6, the refrigerant deposited in the first heat exchanger 2 flows through the ejected port of the ejector 6 through the first pipe port and enters the ejector 6, and the refrigerant deposited in the second heat exchanger 3 flows through the ejected port of the ejector 6 through the fourth pipe port and enters the ejector 6; the diffuser of the ejector 6 is connected to the air inlet of the compressor 5, and the high-temperature and high-pressure refrigerant flowing into the ejector 6 through the second stop valve 8 and the refrigerant deposited in the first heat exchanger 2 and the refrigerant deposited in the second heat exchanger 3 are fully mixed in the diffuser to form a mixed refrigerant, thereby preventing the deposited refrigerant in the outdoor heat exchanger from damaging the compressor 5 and improving the service life of the compressor 5.

[0051] In some embodiments of the present application, the air conditioning system further includes a second flow path switching component 9, which includes a second inlet h, a third outlet i and a fourth outlet j; the first pipe port is connected to the second inlet h, the third outlet i is connected to the ejected port of the ejector 6, and the fourth outlet j is connected to the indoor heat exchanger 10 of the air conditioning system; the second flow path switching component has two connection states:

[0052] When the second flow path switching component 9 is connected to the second inlet h and the third outlet i, the first pipe port is connected to the ejected port of the ejector 6 through the second flow path switching component 9;

[0053] When the second flow path switching component 9 is connected to the second inlet h and the fourth outlet j, the first pipe port is connected to the indoor heat exchanger 10 through the second flow path switching component 9.

[0054] It can be understood that the second flow path switching component 9 is arranged between the outdoor heat exchanger and the indoor heat exchanger 10, and the second flow path switching component 9 is also arranged between the outdoor heat exchanger and the ejector 6. The second flow path switching component 9 includes a second inlet h, a third outlet i and a fourth outlet j. The first pipe opening of the first heat exchanger 2 is connected to the second inlet h of the second flow path switching component 9. The second flow path switching component has two connection states. When the air-conditioning system needs to perform frosting and dust removal, the second flow path switching component is in the first connection state, that is, the second flow path switching component 9 connects the second inlet h and the third outlet i. Since the second flow path switching component The third outlet i of 9 is connected to the ejected port of the ejector 6, the refrigerant deposited in the first heat exchanger 2 flows through the second inlet h of the second flow path switching component 9, and flows to the ejected port of the ejector 6 through the third outlet i of the second flow path switching component 9. Since the fourth pipe mouth of the second heat exchanger 3 is connected to the ejected port of the ejector 6, the refrigerant deposited in the second heat exchanger 3 flows into the ejector 6 through the ejected port. The high-temperature and high-pressure refrigerant stored in the ejector 6 and the deposited refrigerant flowing into the ejected port are fully mixed in the diffusion tube to form a mixed refrigerant, which prevents the deposited refrigerant in the outdoor heat exchanger from damaging the compressor 5 and improves the service life of the compressor 5. When the air-conditioning system does not need to perform frost and dust removal, the second flow path switching component is in the second connection state, that is, the second flow path switching component 9 connects the second inlet h and the fourth outlet j, and the first pipe port of the first heat exchanger 2 is connected to the indoor heat exchanger 10 through the fourth outlet j of the second flow path switching component 9, so that the refrigerant flows from the outdoor heat exchanger through the second flow path switching component 9 and then flows through the indoor heat exchanger 10 to realize heat exchange.

[0055] In some embodiments of the present application, the air-conditioning system also includes a four-way valve 11, and the second outlet g of the first flow path switching component 1 is connected to the ejected port of the ejector 6 through the four-way valve 11. Since the second outlet g of the first flow path switching component 1 is connected to the fourth pipe port of the second heat exchanger 3, when the air-conditioning system needs to frost and dust remove, the refrigerant deposited in the second heat exchanger 3 flows out through the fourth pipe port of the second heat exchanger 3, and the refrigerant flows through the ejected port after passing through the four-way valve 11, and the refrigerant flows into the ejector 6 through the ejected port.

[0056] It should be noted that the four-way valve 11 is used to change the flow direction of the refrigerant. The four-way valve 11 includes four valve ports, namely valve port a, valve port b, valve port c and valve port d. When the air-conditioning system needs frosting and dust removal, the refrigerant deposited in the second heat exchanger 3 flows out through the fourth pipe port of the second heat exchanger 3. The refrigerant flows through the valve ports b and valve port c of the four-way valve 11 and then flows to the ejected port of the ejector 6. The refrigerant enters the ejector 6 through the ejected port.

[0057] In some embodiments of the present application, the second pipe opening and the third pipe opening are also connected by a direct refrigerant pipe, and the direct refrigerant pipe is provided with a third stop valve 12; the third stop valve 12 is provided on the direct refrigerant pipe between the second pipe opening of the first heat exchanger 2 and the third pipe opening of the second heat exchanger 3, and the third stop valve 12 is provided on the direct refrigerant pipe between the second pipe opening and the third pipe opening. When the air-conditioning system needs to perform frosting and dust removal, the third stop valve 12 is in a closed state, so that the refrigerant flowing out of the second pipe opening of the first heat exchanger 2 passes through the heat exchanger 3. The refrigerant flows through the second heat exchanger 3 after the flow component 4, which effectively prevents the refrigerant flowing out of the second pipe port of the first heat exchanger 2 from directly flowing into the second heat exchanger 3 through the directly connected refrigerant pipe. Since the throttling component 4 plays a role in regulating the refrigerant flow and reducing the refrigerant pressure, the throttling component 4 can convert the high-pressure refrigerant into a low-pressure refrigerant, thereby forming a pressure difference between the refrigerant flowing out of the second pipe port of the first heat exchanger 2 and the refrigerant flowing into the third pipe port of the second heat exchanger 3, so that the first heat exchanger 2 acts as a condenser and the second heat exchanger 3 acts as an evaporator to achieve heat exchange.

[0058] In some embodiments of the present application, the air-conditioning system also includes a third flow path switching component 13, the third flow path switching component 13 includes a third inlet k, a fifth outlet l and a sixth outlet m, the third inlet k is connected to the third pipe opening, the fifth outlet l is connected to the second pipe opening through the throttling component 4, and the sixth outlet m is connected to the second pipe opening through a direct refrigerant pipe.

[0059] The air conditioning system includes a third flow path switching component 13, the third inlet k of the third flow path switching component 13 is connected to the third pipe port of the second heat exchanger 3, the fifth outlet l of the third flow path switching component 13 is connected to the second pipe port of the first heat exchanger 2 through the throttling component 4, and the sixth outlet m of the third flow path switching component 13 is connected to the second pipe port of the first heat exchanger 2 through the direct refrigerant pipe. When the air conditioning system needs to perform frosting and dust removal, and the first flow path switching component 1 is connected to the first inlet e and the second outlet g, the high-temperature and high-pressure refrigerant flowing out of the exhaust port of the compressor 5 flows through the first flow path switching component 1 and flows out from the second outlet g of the first flow path switching component 1, so that the high-temperature and high-pressure refrigerant flows through the fourth pipe port of the second heat exchanger 3 and enters the second heat exchanger 3. The high-temperature and high-pressure refrigerant releases heat in the second heat exchanger 3 to achieve heat exchange, so that the temperature of the refrigerant is reduced, and the refrigerant flows out from the third pipe port of the second heat exchanger 3 and flows through the third inlet k of the third flow path switching component 13. Since the third flow path switching component 13 is required in the air conditioning system When frosting and dust removal is performed, the third inlet k and the fifth outlet l are connected, so the refrigerant flowing out from the third pipe port of the second heat exchanger 3 flows out through the fifth outlet l of the third flow path switching component 13, and flows into the second pipe port of the first heat exchanger 2 after passing through the throttling component 4. Since the throttling component 4 plays a role in regulating the refrigerant flow rate and reducing the refrigerant pressure, the throttling component 4 can convert high-pressure refrigerant into low-pressure refrigerant, thereby forming a pressure difference between the refrigerant flowing out of the third pipe port of the second heat exchanger 3 and the refrigerant flowing into the second pipe port of the first heat exchanger 2, so that the first heat exchanger 2 acts as an evaporator and the second heat exchanger 3 acts as a condenser to achieve heat exchange.

[0060] By setting a third stop valve 12 on a directly connected refrigerant pipe between the second pipe opening of the first heat exchanger 2 and the third pipe opening of the second heat exchanger 3, when the air-conditioning system needs to perform frosting and dust removal, the third stop valve 12 is in a closed state, and the refrigerant flowing out of the second pipe opening of the first heat exchanger 2 flows through the third pipe opening of the second heat exchanger 3 through the throttling component 4, so that the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the first heat exchanger 2 to release heat and then absorbs heat and frosts in the second heat exchanger 3; by setting a third flow path switching component 13 in the air-conditioning system, the third inlet k of the third flow path switching component 13 is connected to the third inlet k of the second heat exchanger 3 The fifth outlet l of the third flow path switching component 13 is connected to the second outlet of the first heat exchanger 2 through the throttling component 4, and the sixth outlet m of the third flow path switching component 13 is connected to the second outlet of the first heat exchanger 2 through the direct refrigerant pipe. When the air-conditioning system needs to defrost and remove dust, the third flow path switching component 13 connects the third inlet k and the fifth outlet l, and the refrigerant flowing out of the fifth outlet of the second heat exchanger 3 flows through the second outlet of the first heat exchanger 2 through the throttling component 4, so that the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 releases heat through the second heat exchanger 3 for defrosting and dust removal, and then absorbs heat and frosts in the first heat exchanger 2. In this way, the first heat exchanger 2 and the second heat exchanger 3 act as condensers and evaporators in turn, without the participation of the indoor unit, and can not affect the indoor environment in the frosting and dust removal mode, thereby improving the user experience.

[0061] In some embodiments of the present application, in the frosting and dust removal mode, the first refrigerant circuit and the second refrigerant circuit are switched by the first flow path switching component 1, and the first heat exchanger 2 and the second heat exchanger 3 are alternately frosted and dust removed.

[0062] The first flow path switching component 1 includes a first inlet e, a first outlet f and a second outlet g. The first heat exchanger 2 and the second heat exchanger 3 are arranged in the outdoor unit, and the exhaust port of the compressor 5 is connected to the first heat exchanger 2 through the first outlet f of the first flow path switching component 1, and the second outlet g of the first flow path switching component 1 is connected to the second heat exchanger 3, and the first heat exchanger 2 and the second heat exchanger 3 are connected through the throttling component 4. Therefore, when the air-conditioning system needs to frost and dust, the first refrigerant circuit is switched through the first flow path switching component 1, and the first flow path switching component 1 connects the first inlet e and the first outlet f, and the high-temperature and high-pressure refrigerant flows out from the exhaust port of the compressor 5, and forms a first refrigerant circuit of the exhaust port of the compressor 5-the first heat exchanger 2-the throttling component 4-the second heat exchanger 3-the air inlet of the compressor 5, that is, under the first refrigerant circuit, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the first heat exchanger 2 to release heat and then absorbs heat and frosts in the second heat exchanger 3. Then, the second refrigerant circuit is switched by the first flow path switching component 1, and the first flow path switching component 1 is connected to the first inlet e and the second outlet g, forming a second refrigerant circuit of the exhaust port of the compressor 5-the second heat exchanger 3-the throttling component 4-the first heat exchanger 2-the air inlet of the compressor 5, that is, under the second refrigerant circuit, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the second heat exchanger 3 to release heat for defrosting and dust removal, and then absorbs heat for frosting in the first heat exchanger 2. The first refrigerant circuit and the second refrigerant circuit are switched by the first flow path switching component 1, and the first heat exchanger 2 and the second heat exchanger 3 are alternately frosted and dusted. In this way, the first heat exchanger 2 and the second heat exchanger 3 are alternately used as condensers and evaporators, without the participation of the indoor unit, and can not affect the indoor environment in the frosting and dust removal mode, thereby improving the user experience.

[0063] In some embodiments of the present application, the air conditioning system further includes a four-way valve 11 and an indoor heat exchanger 10, the four-way valve 11 is connected to the indoor heat exchanger 10, and a fourth stop valve 15 is provided in the refrigerant pipeline connecting the four-way valve 11 and the indoor heat exchanger 10.

[0064] The four-way valve 11 is used to change the flow direction of the refrigerant. The four-way valve 11 includes four valve ports, namely valve port a, valve port b, valve port c and valve port d. When the air conditioning system is frosting and dusting, the refrigerant deposited in the second heat exchanger 3 flows out through the fourth pipe port of the second heat exchanger 3. After flowing through the valve ports b and valve ports c of the four-way valve 11, the refrigerant flows to the ejected port of the ejector 6. The refrigerant enters the ejector 6 through the ejected port. By arranging a fourth stop valve 15 in the refrigerant pipeline connecting the four-way valve 11 and the indoor heat exchanger 10, when the air conditioning system is frosting and dusting, the fourth stop valve 15 is in a closed state, which can effectively prevent the refrigerant deposited in the second heat exchanger 3 from flowing back to the indoor heat exchanger 10 after passing through the four-way valve 11, thereby preventing the deposited refrigerant in the second heat exchanger 3 from damaging the indoor heat exchanger 10, thereby improving the service life of the indoor heat exchanger 10.

[0065] In another embodiment, a fourth stop valve 15 is provided in the refrigerant pipeline connecting the four-way valve 11 and the indoor heat exchanger 10, which can adjust the refrigerant flow and play a throttling role. It is understandable that when the air-conditioning system is in a cooling state, the fourth stop valve 15 is in an open state, and the high-temperature and high-pressure refrigerant flows out from the exhaust port of the compressor 5, forming a refrigerant circuit of the exhaust port of the compressor 5-valve port a of the four-way valve 11-valve port b of the four-way valve 11-first heat exchanger 2-directly connected refrigerant pipe-second heat exchanger 3-valve port b of the four-way valve 11-valve port d of the four-way valve 11-fourth stop valve 15-indoor heat exchanger 10, completing heat exchange and achieving cooling. When the air-conditioning system is in the heating state, the fourth stop valve 15 is in the open state, and the high-temperature and high-pressure refrigerant flows out from the exhaust port of the compressor 5, forming a refrigerant circuit of the exhaust port of the compressor 5 - the valve port a of the four-way valve 11 - the valve port d of the four-way valve 11 - the fourth stop valve 15 - the indoor heat exchanger 10 - the first heat exchanger 2 - the directly connected refrigerant pipe - the second heat exchanger 3 - the valve port b of the four-way valve 11 - the valve port a of the four-way valve 11 - the return air port of the compressor 5, completing the heat exchange and realizing heating.

[0066] In some embodiments of the present application, the air-conditioning system also includes a first temperature sensor and a second temperature sensor, the first temperature sensor is used to detect the temperature of the first heat exchanger 2, and the second temperature sensor is used to detect the temperature of the second heat exchanger 3; when the temperature of the second heat exchanger 3 is lower than the ambient temperature by a first temperature value, the first refrigerant circuit is switched to the second refrigerant circuit, and when the temperature of the first heat exchanger 2 is lower than the ambient temperature by a second temperature value, the second refrigerant circuit is switched to the first refrigerant circuit.

[0067] It can be understood that in the frosting and dust removal mode, the first refrigerant circuit and the second refrigerant circuit are switched by the first flow path switching component 1, and the first heat exchanger 2 and the second heat exchanger 3 are alternately frosted and dust removed. The switching standard of the first flow path switching component 1 switching the first refrigerant circuit and the second refrigerant circuit is to switch by judging the temperature of the first heat exchanger 2 and the temperature of the second heat exchanger 3. Therefore, a first temperature sensor and a second temperature sensor are set in the air conditioning system, and the first temperature sensor is used to detect the temperature of the first heat exchanger 2, and the second temperature sensor is used to detect the temperature of the second heat exchanger 3. The temperature of the second heat exchanger 3 detected by the second temperature sensor is obtained. When the temperature of the second heat exchanger 3 is lower than the ambient temperature by a first temperature value, the first refrigerant circuit is switched to the second refrigerant circuit by the first flow path switching component 1. The temperature of the first heat exchanger 2 detected by the first temperature sensor is obtained. When the temperature of the first heat exchanger 2 is lower than the ambient temperature by a second temperature value, the second refrigerant circuit is switched to the first refrigerant circuit by the first flow path switching component 1.

[0068] It should be noted that when the temperature of the air conditioner is about 5 degrees Celsius lower than the external ambient temperature, frost may occur. Therefore, in the embodiment of the present application, the first temperature value is set to 5 degrees Celsius and the second temperature value is set to 5 degrees Celsius. Technical personnel in this field can set the size of the first temperature value and the size of the second temperature value according to actual conditions. The embodiment of the present application does not limit the size of the first temperature value and the second temperature value.

[0069] In some embodiments of the present application, the air conditioning system further includes a liquid storage tank 14 , an inlet of the liquid storage tank 14 is connected to the diffuser of the ejector 6 , and an outlet of the liquid storage tank 14 is connected to the air inlet of the compressor 5 .

[0070] By setting a liquid storage tank 14 in the air conditioning system, and setting the liquid storage tank 14 between the diffuser of the ejector 6 and the air inlet of the compressor 5, the gas-liquid mixed refrigerant can be collected. Since the inlet of the liquid storage tank 14 is connected to the diffuser of the ejector 6, and the outlet of the liquid storage tank 14 is connected to the air inlet of the compressor 5, the gas-liquid mixed refrigerant flowing out of the diffuser of the ejector 6 enters the liquid storage tank 14. Due to the different densities of the gaseous refrigerant and the liquid refrigerant, the gaseous refrigerant and the liquid refrigerant are stratified in the liquid storage tank 14. After stratification, the liquid refrigerant is located at the bottom of the liquid storage tank 14, and the gaseous refrigerant is located above the liquid refrigerant. The outlet of the liquid storage tank 14 is connected to the air inlet of the compressor 5. It can be understood that the gaseous refrigerant flows back to the air inlet of the compressor 5 through the outlet of the liquid storage tank 14, realizing the recycling of the refrigerant.

[0071] By setting up a liquid storage tank 14 in the air-conditioning system, the refrigerant flowing out of the diffuser of the ejector 6 is first separated into gas and liquid, which can effectively prevent the gas-liquid mixed refrigerant from entering the air inlet of the compressor 5, prevent the gas-liquid mixed refrigerant from damaging the compressor 5, and increase the service life of the compressor 5.

[0072] The air conditioning system of the present application is described in detail below through a specific example.

[0073] During the long-term use of the air conditioner, dust gradually accumulates in the outdoor unit heat exchanger, resulting in obstruction of air intake. Therefore, the motor needs more power to achieve the air intake efficiency of the initial state, which causes the outdoor unit current to increase in the process. Normally, the criterion for the outdoor unit to enter the dust removal mode is that when the outdoor unit current exceeds 20% of the rated current, the outdoor unit needs to be dusted. The present application proposes a frosting and dust removal method to deal with the dust accumulated in the outdoor unit. In order to achieve frosting and dust removal of the air conditioner, firstly, T0 of the air conditioner when it is used in the initial state without dust accumulation is recorded. T0 is the average value of the ratio of the motor current and the wind wheel speed of the air conditioner outdoor unit used for the first 20 times after leaving the factory. Combined with the criterion for the outdoor unit to enter the dust removal mode, that is, when the outdoor unit current exceeds 20% of the rated current; therefore, when the average value of the ratio of the motor current and the wind wheel speed of the air conditioner outdoor unit T≥1.2T0, the outdoor unit is controlled to enter the frosting and dust removal mode.

[0074] In the embodiment of the present application, the air conditioning system includes a first flow path switching component 1, a first heat exchanger 2 and a second heat exchanger 3. The first flow path switching component 1 includes a first inlet e, a first outlet f and a second outlet g. The first flow path switching component has two connected states. The first connected state is: when the first flow path switching component 1 is connected to the first inlet e and the first outlet f, a first refrigerant circuit of the exhaust port of the compressor 5-the first heat exchanger 2-the throttling component 4-the second heat exchanger 3-the air inlet of the compressor 5 is formed; the second connected state is: when the first flow path switching component 1 is connected to the first inlet e and the second outlet g, a second refrigerant circuit of the exhaust port of the compressor 5-the second heat exchanger 3-the throttling component 4-the first heat exchanger 2-the air inlet of the compressor 5 is formed. Therefore, the outdoor unit can operate independently by controlling the opening and closing direction of the first flow path switching component 1, so as to realize the frost and dust removal or defrost and dust removal of the first heat exchanger 2 and the second heat exchanger 3.

[0075] Since the outdoor unit heat exchanger is divided into two or more, namely the first heat exchanger 2 and the second heat exchanger 3, in order to prevent the refrigerant deposited in the outdoor unit heat exchanger from still entering the compressor 5 through the liquid storage tank 14 and causing liquid hammer in the compressor 5, an ejector 6 is introduced into the piping design of the air-conditioning system of the present application. Through the ejector 6, part of the high-pressure refrigerant and the low-pressure refrigerant deposited in the outdoor unit heat exchanger are fully mixed to form a mixed refrigerant, thereby preventing the deposited refrigerant in the outdoor heat exchanger from damaging the compressor 5.

[0076] When the air conditioning system needs to remove dust, the high-temperature and high-pressure refrigerant flowing out of the compressor 5 passes through the first flow path switching component 1, and the first heat exchanger 2 and the second heat exchanger 3 are frosted and dusted respectively through the first flow path switching component 1, that is, under the first refrigerant circuit, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the first heat exchanger 2 to release heat and then absorbs heat and frosts in the second heat exchanger 3. When the temperature of the second heat exchanger 3 is 5 degrees Celsius lower than the ambient temperature, the first flow path switching component 1 switches the first refrigerant circuit to the second refrigerant circuit. Under the second refrigerant circuit, the high-temperature and high-pressure refrigerant output from the exhaust port of the compressor 5 enters the second heat exchanger 3 to release heat and defrost and dust, and then absorbs heat and frosts in the first heat exchanger 2. When the temperature of the first heat exchanger 2 is 5 degrees Celsius lower than the ambient temperature, the first flow path switching component 1 switches the second refrigerant circuit to the first refrigerant circuit. In this way, the first heat exchanger 2 and the second heat exchanger 3 act as a condenser and an evaporator in turn, so that the indoor unit or the outdoor unit of the air-conditioning system can independently perform frost and dust removal without the participation of the indoor unit. It can not affect the indoor environment in the frost and dust removal mode, thereby improving the user experience.

[0077] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network nodes. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0078] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0079] In several embodiments provided in the present application, it should be understood that the disclosed systems and apparatuses can be implemented in other ways. For example, the apparatus embodiments described above are merely schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of apparatuses or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0080] It should also be understood that the various implementations provided in the embodiments of the present application can be combined arbitrarily to achieve different technical effects.

[0081] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. An air conditioning system, characterized in that: The invention comprises a first heat exchanger, a second heat exchanger and a first flow path switching component, wherein the first flow path switching component comprises a first inlet, a first outlet and a second outlet; The exhaust port of the compressor of the air conditioning system is connected to the first inlet, the first outlet is connected to the first pipe port of the first heat exchanger, the second pipe port of the first heat exchanger is connected to the third pipe port of the second heat exchanger through a throttling assembly, and the fourth pipe port of the second heat exchanger is connected to the second outlet; the first outlet is also connected to the air inlet of the compressor, and the second outlet is also connected to the air inlet of the compressor; The first flow path switching component has two connection states: When the first flow path switching component is connected to the first inlet and the first outlet, the exhaust port of the compressor, the first heat exchanger, the throttling component, the second heat exchanger and the air inlet of the compressor form a first refrigerant circuit; When the first flow path switching component connects the first inlet and the second outlet, the exhaust port of the compressor, the second heat exchanger, the throttling component, the first heat exchanger and the air inlet of the compressor form a second refrigerant circuit.

2. The air conditioning system according to claim 1, characterized in that: It also includes an ejector, the first inlet is also connected to the nozzle of the ejector, the first pipe opening and the fourth pipe opening are both connected to the ejected port of the ejector, and the diffuser of the ejector is connected to the air inlet of the compressor.

3. The air conditioning system according to claim 2, characterized in that: The refrigerant pipeline connecting the exhaust port of the compressor and the first inlet is provided with a first stop valve, and the refrigerant pipeline connecting the first inlet and the nozzle of the ejector is provided with a second stop valve.

4. The air conditioning system according to claim 2, characterized in that: The air conditioning system further comprises a second flow path switching assembly, the second flow path switching assembly comprising a second inlet, a third outlet and a fourth outlet; the first pipe port is connected to the second inlet, the third outlet is connected to the ejected port of the ejector, and the fourth outlet is connected to the indoor heat exchanger of the air conditioning system; The second flow path switching component has two connection states: When the second flow path switching component is connected to the second inlet and the third outlet, the first pipe port is connected to the ejected port of the ejector through the second flow path switching component; When the second flow path switching component is connected to the second inlet and the fourth outlet, the first pipe port is connected to the indoor heat exchanger through the second flow path switching component.

5. The air conditioning system according to claim 2, characterized in that: The air conditioning system further comprises a four-way valve, and the second outlet is connected to the ejected port of the ejector through the four-way valve.

6. The air conditioning system according to claim 1, characterized in that: The second pipe opening and the third pipe opening are also connected via a direct refrigerant pipe; The directly connected refrigerant pipe is provided with a third stop valve; Alternatively, the air-conditioning system also includes a third flow path switching component, the third flow path switching component includes a third inlet, a fifth outlet and a sixth outlet, the third inlet is connected to the third pipe opening, the fifth outlet is connected to the second pipe opening through the throttling component, and the sixth outlet is connected to the second pipe opening through the direct-connected refrigerant pipe.

7. The air conditioning system according to claim 1, characterized in that: The air conditioning system further comprises a four-way valve and an indoor heat exchanger, wherein the four-way valve is connected to the indoor heat exchanger, and a fourth stop valve is arranged in a refrigerant pipeline connecting the four-way valve and the indoor heat exchanger.

8. The air conditioning system according to claim 1, characterized in that: The device further comprises a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is used to detect the temperature of the first heat exchanger, and the second temperature sensor is used to detect the temperature of the second heat exchanger.

9. The air conditioning system according to claim 2, characterized in that: The air conditioning system further comprises a liquid storage tank, the inlet of which is connected to the diffuser of the ejector, and the outlet of which is connected to the air inlet of the compressor.

10. The air conditioning system according to claim 1, characterized in that: The first flow path switching component is a three-way valve.

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