Air conditioner

Abstract

The embodiment of the invention provides an air conditioner, belongs to the technical field of household appliances, and aims to solve the technical problem that the heat exchange process of a circulation path is influenced by the phenomena of pipe explosion and the like of the circulation path in the related technology. The air conditioner comprises an indoor unit body, an outdoor unit body and a circulation path. The circulation path comprises a compressor, a storage device, a first heat exchanger and a second heat exchanger. The storage device communicates with the liquid inlet end of the compressor. The first heat exchanger and the second heat exchanger communicate with the compressor; the first pressure relief device is arranged between the first heat exchanger and the second heat exchanger, and the first pressure relief device can be used for collecting a refrigerant from the circulation path; the second pressure relief device comprises a pressure relief pipeline and a control valve; the second end of the pressure relief pipeline is communicated with the storage device; the control valve is arranged on the pressure relief pipeline and at least used for controlling connection and disconnection of the pressure relief pipeline. The air conditioner can reduce the possibility of pipe explosion and other phenomena of the circulation path, and the heat exchange process of the circulation path is guaranteed.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of household appliances, in particular to an air conditioner. BACKGROUND

[0002] The air conditioner is a common household appliance, which can adjust and control indoor air temperature, humidity, cleanliness and air flow speed, so as to improve the comfort of indoor environment.

[0003] The air conditioner usually comprises an indoor unit body, an outdoor unit body and a circulating passage, the circulating passage comprises a compressor, a first heat exchanger arranged in the indoor unit body and a second heat exchanger arranged in the outdoor unit body, so as to realize the flow of refrigerant, thereby realizing the heat exchange process of the indoor unit body and the outdoor unit body.

[0004] However, in the use process of the air conditioner, the circulating passage is prone to excessive pressure and the like, so that the circulating passage may be prone to pipe explosion and the like, thereby affecting the heat exchange process of the circulating passage. SUMMARY

[0005] The embodiment of the present application provides an air conditioner, which can solve the technical problem that the circulating passage is prone to excessive pressure and the like, so that the circulating passage may be prone to pipe explosion and the like, thereby affecting the heat exchange process of the circulating passage.

[0006] In a first aspect, the embodiment of the present application provides an air conditioner, comprising:

[0007] An indoor unit body and an outdoor unit body;

[0008] A circulating passage, the circulating passage comprising a compressor, a storage device, a first heat exchanger and a second heat exchanger;

[0009] The storage device is in communication with the liquid inlet end of the compressor; the first heat exchanger is arranged in the indoor unit body, the second heat exchanger is arranged in the outdoor unit body, and the first heat exchanger, the second heat exchanger and the compressor are in communication;

[0010] A first pressure relief device, the first pressure relief device being arranged between the first heat exchanger and the second heat exchanger, and the first pressure relief device being capable of collecting refrigerant from the circulating passage;

[0011] A second pressure relief device, the second pressure relief device comprising:

[0012] A pressure relief pipeline, a first end of the pressure relief pipeline being arranged between the first heat exchanger and the second heat exchanger, and a second end of the pressure relief pipeline being in communication with the storage device;

[0013] A control valve, the control valve being arranged in the pressure relief pipeline, and the control valve being used at least for controlling the on-off of the pressure relief pipeline.

[0014] The air conditioner of the embodiment of the present application comprises an indoor unit body, an outdoor unit body and a circulation passage. The circulation passage comprises a compressor, a storage device, a first heat exchanger and a second heat exchanger. The storage device is in communication with the liquid inlet end of the compressor. The first heat exchanger is arranged in the indoor unit body. The second heat exchanger is arranged in the outdoor unit body. The first heat exchanger and the second heat exchanger are in communication with the compressor, so that the refrigerant can flow in the circulation passage to realize the heat exchange process of the indoor unit body and the outdoor unit body.

[0015] When the pressure of the refrigerant in the circulation passage is greater than the first set pressure, the refrigerant from the circulation passage can be collected by the first pressure relief device, so that the pressure of the refrigerant in the circulation passage can be reduced. When the pressure of the refrigerant in the circulation passage is greater than or equal to the second set pressure, the second end of the second pressure relief device is controlled to be in communication with the storage device, and the refrigerant from the circulation passage flows to the storage device through the second pressure relief device. The second set pressure is greater than the first set pressure.

[0016] It is easy to understand that, in the embodiment of the present application, by arranging the first pressure relief device and the second pressure relief device in cooperation, the circulation passage of the air conditioner can realize the pressure relief process in two different ways, and the required pressure relief way can be determined according to the pressure in the circulation passage, so that the pressure of the refrigerant in the circulation passage can be more stably adjusted, the possibility of overpressure in the circulation passage can be reduced, and the possibility of pipe explosion in the circulation passage can be reduced, so that the heat exchange process of the circulation passage can be ensured.

[0017] In some embodiments of the present application, the first pressure relief device comprises:

[0018] a liquid storage structure, an inlet end of the liquid storage structure being in communication with the circulation passage;

[0019] a piston movably arranged at the inlet end of the liquid storage structure;

[0020] The first pressure relief device is configured such that when the pressure inside the liquid storage structure is less than the pressure of the circulation passage, the piston can open the inlet end of the liquid storage structure, and the liquid storage structure receives the refrigerant from the circulation passage.

[0021] In this way, when the pressure inside the liquid storage structure is less than the pressure of the circulation passage, the piston can open the inlet end of the liquid storage structure, so that the refrigerant can flow from the circulation passage to the liquid storage structure, and the liquid storage structure receives the refrigerant from the circulation passage, thereby reducing the flow of the refrigerant in the circulation passage to realize the pressure relief process of the circulation passage by the first pressure relief device.

[0022] In some embodiments of the present application, an elastic member is arranged inside the liquid storage structure.

[0023] The first end of the elastic member is connected with the liquid storage structure, and the second end of the elastic member is connected with the piston, and the elastic member can apply an action force to the piston to close the inlet end of the liquid storage structure.

[0024] In this way, the first end of the elastic member is connected with the liquid storage structure, and the second end of the elastic member is connected with the piston, so that the elastic member can apply an action force to the piston to close the inlet end of the liquid storage structure.

[0025] When the pressure of the refrigerant in the circulation passage is greater than the action force of the elastic member to the piston, the refrigerant can push the piston to open the inlet end of the liquid storage structure, so that the refrigerant in the circulation passage can flow into the liquid storage structure.

[0026] When the pressure of the refrigerant in the circulation passage is less than the action force of the elastic member to the piston, the elastic member can push the piston to close the inlet end of the liquid storage structure, so that the refrigerant in the circulation passage cannot flow into the liquid storage structure, and the elastic member can drive the piston to realize a reset process.

[0027] In addition, the elastic coefficient of the elastic member can be determined according to the set pressure of the refrigerant in the circulation passage. When the set pressure of the refrigerant is greater than the action force of the elastic member, the first pressure relief device can receive the refrigerant from the circulation passage through the liquid storage structure. When the set pressure of the refrigerant is less than the action force of the elastic member, the first pressure relief device can be in a closed state, so that the pressure relief process of the first pressure relief device is simpler.

[0028] In some embodiments of the present application, the first pressure relief device is provided with a vibration sensor, and the vibration sensor can obtain the movement of the elastic member.

[0029] In this way, when the elastic member is elastically deformed, the vibration sensor can obtain the elastic movement of the elastic member, so as to obtain the elastic health degree of the elastic member through the vibration sensor, and ensure the normal use of the elastic member.

[0030] When the elastic member is elastically deformed, the vibration sensor can obtain the elastic movement of the elastic member. For example, when the pressure of the refrigerant in the circulation passage is equal to the action force of the elastic member to the piston, the piston is in a relatively static state, and the elastic member is in a balanced state. At this time, the vibration sensor can obtain the state of the elastic member, so as to obtain the pressure of the refrigerant in the circulation passage through the pressure sensor, so as to determine the state of the second pressure relief device.

[0031] It should be noted that the force of the elastic member is generally related to the expansion and contraction amount of the elastic member, when the elastic member is in a balanced state, the pressure of the refrigerant in the circulation passage is uncertain, so the state of the elastic member can be obtained through the vibration sensor, at this time the refrigerant in the circulation passage will not flow into the liquid storage structure, the pressure of the refrigerant in the circulation passage is relatively stable, so that the pressure obtained by the pressure sensor is more accurate.

[0032] In some embodiments of the present application, the liquid storage structure comprises a buffer flow channel, a Venturi flow channel and a liquid storage portion arranged in sequence in the direction away from the inlet end;

[0033] The piston is movably arranged in the buffer flow channel;

[0034] The diameter of the Venturi flow channel is smaller than the diameter of the buffer flow channel, and the diameter of the Venturi flow channel is smaller than the diameter of the liquid storage portion, and at least part of the diameter of the liquid storage portion is greater than the diameter of the buffer flow channel.

[0035] In this way, when the refrigerant in the circulation passage flows into the liquid storage structure through the inlet end, the refrigerant can flow from the buffer flow channel to the Venturi flow channel, and flow through the Venturi flow channel to the liquid storage portion.

[0036] The diameter of the Venturi flow channel is smaller than the diameter of the buffer flow channel, and the diameter of the Venturi flow channel is smaller than the diameter of the liquid storage portion, and at least part of the diameter of the liquid storage portion is greater than the diameter of the buffer flow channel, so that the flow rate of the refrigerant can be increased when passing through the Venturi flow channel, and a local low pressure area is generated by Bernoulli effect to achieve auxiliary pressure reduction, and finally enter the liquid storage portion.

[0037] At least part of the diameter of the liquid storage portion is greater than the diameter of the buffer flow channel, so that the liquid storage portion can absorb certain pressure fluctuations, thereby reducing the impact of the refrigerant in the liquid storage structure on the piston. When the pressure inside the liquid storage structure is greater than the pressure of the circulation passage, the refrigerant can slowly push the piston, so that the piston can slowly close the inlet end of the liquid storage structure, and can play a certain protection role for the elastic member, reducing the possibility of damage of the elastic member.

[0038] In some embodiments of the present application, the circulation passage comprises a reversing valve, the liquid inlet of the reversing valve is in communication with the liquid outlet of the compressor, and the liquid return of the reversing valve is in communication with the liquid return of the compressor;

[0039] The first reversing port of the reversing valve is in communication with the first heat exchanger, and the second reversing port of the reversing valve is in communication with the second heat exchanger.

[0040] In this way, the circulation passage comprises a reversing valve, a first reversing port of the reversing valve is communicated with the first heat exchanger, and a second reversing port of the reversing valve is communicated with the second heat exchanger, so that the reversing valve can guide the refrigerant from the compressor to the first heat exchanger, thereby flowing to the second heat exchanger through the first heat exchanger, and can also guide the refrigerant from the compressor to the second heat exchanger, thereby flowing to the first heat exchanger through the second heat exchanger, so that the refrigerant can flow in different directions to realize switching of the refrigeration and heating processes of the air conditioner.

[0041] In some embodiments of the present application, the first end of the pressure relief pipeline is arranged between the first heat exchanger and the second heat exchanger, and the second end of the pressure relief pipeline is located between the liquid return port of the reversing valve and the liquid return end of the compressor.

[0042] In this way, the second end of the pressure relief pipeline is located between the liquid return port of the reversing valve and the liquid return end of the compressor, so that the pressure relief pipeline can directly guide the refrigerant between the first heat exchanger and the second heat exchanger to the liquid return end of the compressor, thereby shortening the flow path of the refrigerant and improving the pressure relief efficiency of the second pressure relief device.

[0043] In a second aspect, the embodiments of the present application provide an air conditioner, comprising:

[0044] an indoor unit body and an outdoor unit body;

[0045] a circulation passage comprising a compressor, a storage device, a first heat exchanger and a second heat exchanger;

[0046] The storage device is communicated with the liquid inlet end of the compressor, the first heat exchanger is arranged in the indoor unit body, the second heat exchanger is arranged in the outdoor unit body, and the first heat exchanger, the second heat exchanger and the compressor are communicated;

[0047] a first pressure relief device arranged between the first heat exchanger and the second heat exchanger, the first pressure relief device being capable of collecting refrigerant from the circulation passage;

[0048] a second pressure relief device, a first end of the second pressure relief device being arranged between the first heat exchanger and the second heat exchanger, and a second end of the second pressure relief device being capable of being communicated with the storage device;

[0049] The air conditioner comprises a control device, and the control device is configured to:

[0050] when the pressure of the refrigerant in the circulation passage is greater than a first set pressure, controlling the second end of the second pressure relief device not to be communicated with the storage device, and collecting the refrigerant from the circulation passage through the first pressure relief device;

[0051] When the pressure of the refrigerant in the circulation passage is greater than or equal to a second set pressure, the second end of the second pressure relief device is controlled to be in communication with the storage device, and the refrigerant from the circulation passage flows to the storage device through the second pressure relief device, the second set pressure being greater than the first set pressure.

[0052] The air conditioner of the embodiment of the present application can collect the refrigerant from the circulation passage through the first pressure relief device when the pressure of the refrigerant in the circulation passage is greater than the first set pressure, thereby reducing the pressure of the refrigerant in the circulation passage.

[0053] When the pressure of the refrigerant in the circulation passage is greater than or equal to a second set pressure, the second end of the second pressure relief device is controlled to be in communication with the storage device, and the refrigerant from the circulation passage flows to the storage device through the second pressure relief device, the second set pressure being greater than the first set pressure.

[0054] It is easy to understand that, in the embodiment of the present application, the first pressure relief device and the second pressure relief device are matched to enable the circulation passage of the air conditioner to realize the pressure relief process in two different ways, and the required pressure relief way can be determined according to the pressure in the circulation passage, thereby more stably regulating the pressure of the refrigerant in the circulation passage, reducing the possibility of overpressure in the circulation passage, and reducing the possibility of pipe explosion in the circulation passage, thereby ensuring the heat exchange process of the circulation passage.

[0055] In some embodiments of the present application, the control device is configured to:

[0056] In the process of collecting the refrigerant from the circulation passage through the first pressure relief device, when the pressure of the refrigerant in the circulation passage is less than or equal to a first threshold, the first pressure relief device is in a closed state, and the first threshold is lower than the first set pressure.

[0057] In the process of collecting the refrigerant from the circulation passage through the second pressure relief device, when the pressure of the refrigerant in the circulation passage is less than or equal to a second threshold, the second pressure relief device is controlled to be in a closed state, and the second threshold is lower than the second set pressure.

[0058] In this way, by setting the first threshold, the first threshold is lower than the first set pressure, thereby providing a certain buffer space for the first pressure relief device, reducing the possibility of repeated opening and closing of the first pressure relief device due to unstable pressure, and making the use process of the first pressure relief device more stable.

[0059] And, by setting the second threshold value, the second threshold value is lower than the second set pressure, so that the second pressure relief device can provide a certain buffer space, reduce the possibility of the second pressure relief device due to pressure instability and repeated opening and closing, so that the use process of the second pressure relief device is more stable.

[0060] In some embodiments of the present application, the control device is configured to:

[0061] Obtaining the pressure change rate of the refrigerant in the circulation passage, the pressure change rate being determined according to the pressure of the refrigerant and the refrigerant flow time;

[0062] When the pressure of the refrigerant in the circulation passage is greater than the first set pressure, and the pressure change rate of the refrigerant in the circulation passage is less than or equal to the set rate, the second end of the second pressure relief device is controlled to communicate with the storage device, and the refrigerant from the circulation passage flows to the storage device through the second pressure relief device.

[0063] In this way, when the pressure of the refrigerant in the circulation passage is greater than the first set pressure, and the pressure change rate of the refrigerant in the circulation passage is less than or equal to the set rate, the pressure relief effect of the first pressure relief device is poor, and the pressure change of the refrigerant in the circulation passage is slow, so that the pressure relief process can be realized through the second pressure relief device and the first pressure relief device synchronously, thereby improving the pressure relief efficiency.

[0064] By obtaining the pressure change rate of the refrigerant in the circulation passage, the opening and closing of the second pressure relief device can be controlled according to the pressure change rate of the refrigerant in the circulation passage, so that the control process of the second pressure relief device is more reasonable.

[0065] In a third aspect, the embodiments of the present application provide a computer readable storage medium, the computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by a processor to implement the first aspect and / or various possible implementation manners of the first aspect.

[0066] In a fourth aspect, the embodiments of the present application provide a computer program product, including a computer program, and the computer program is executed by a processor to implement the first aspect and / or various possible implementation manners of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0067] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the drawings needed in the embodiment or related technical description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0068] Figure 1Fig. 1 is a structural schematic diagram of a circulation passage, a first pressure relief device and a second pressure relief device according to an embodiment of the present application;

[0069] Figure 2 Fig. 2 is a structural schematic diagram of a circulation passage according to an embodiment of the present application;

[0070] Figure 3 Fig. 3 is a structural schematic diagram of a first pressure relief device according to an embodiment of the present application;

[0071] Figure 4 Fig. 4 is a flow schematic diagram of a control method of an air conditioner according to an embodiment of the present application;

[0072] Figure 5 Fig. 5 is a specific flow schematic diagram of a control method of an air conditioner according to an embodiment of the present application;

[0073] Figure 6 Fig. 6 is a flow schematic diagram of controlling a second pressure relief device according to a pressure change rate according to an embodiment of the present application.

[0074] Legend of reference signs:

[0075] 10, indoor unit body; 20, outdoor unit body;

[0076] 100, circulation passage;

[0077] 110, compressor; 120, first heat exchanger; 130, second heat exchanger; 140, reversing valve; 150, storage device; 160, pressure sensor;

[0078] 200, first pressure relief device;

[0079] 210, liquid storage structure; 211, buffer flow channel; 212, Venturi flow channel; 213, liquid storage part; 220, piston; 230, vibration sensor; 240, elastic member;

[0080] 300, second pressure relief device;

[0081] 310, pressure relief pipeline; 320, control valve. DETAILED DESCRIPTION

[0082] As the background, the air conditioner in the related art is a common household appliance, which can adjust and control indoor air temperature, humidity, cleanliness and air flow speed, etc. to improve the comfort of indoor environment.

[0083] In the related art, the air conditioner usually includes an indoor unit body, an outdoor unit body and a circulation passage, the circulation passage including a compressor, a first heat exchanger arranged in the indoor unit body and a second heat exchanger arranged in the outdoor unit body, to realize the flow of refrigerant, thereby realizing the heat exchange process of the indoor unit body and the outdoor unit body.

[0084] For example, when the air conditioner is in a cooling mode, the first heat exchanger located in the indoor unit absorbs heat from the indoor environment by evaporating, and the gaseous refrigerant (i.e., coolant) enters the outdoor unit through the gaseous cutoff valve of the outdoor unit. The refrigerant enters the gas-liquid separator through the four-way valve, and the gas-liquid separator separates the liquid refrigerant from the gaseous refrigerant. The gaseous refrigerant enters the compressor and is compressed into a high-temperature and high-pressure gas. The gaseous refrigerant flows through the second heat exchanger located in the outdoor unit and releases heat.

[0085] Then, the refrigerant flows through the second heat exchanger located in the outdoor unit and is throttled by the outdoor electronic expansion valve. The pressure of the refrigerant decreases, and the corresponding pressure value is transmitted to the central processor when the refrigerant flows through the liquid cutoff valve. Finally, the refrigerant enters the indoor unit, thereby realizing the flow process of the coolant.

[0086] However, during the use of the air conditioner, the circulating path may have excessive pressure, which may cause the circulating path to burst, thereby affecting the heat exchange process of the circulating path.

[0087] Therefore, the air conditioner according to the embodiments of the present application includes an indoor unit, an outdoor unit, and a circulating path. The circulating path includes a compressor, a storage device, a first heat exchanger, and a second heat exchanger. The storage device is in communication with the liquid inlet end of the compressor. The first heat exchanger is arranged in the indoor unit, and the second heat exchanger is arranged in the outdoor unit. The first heat exchanger and the second heat exchanger are in communication with the compressor, thereby enabling the coolant to flow in the circulating path to realize the heat exchange process of the indoor unit and the outdoor unit.

[0088] When the pressure of the coolant in the circulating path is greater than the first set pressure, the coolant from the circulating path can be collected by the first pressure relief device, thereby reducing the pressure of the coolant in the circulating path. When the pressure of the coolant in the circulating path is greater than or equal to the second set pressure, the second end of the second pressure relief device is controlled to be in communication with the storage device, and the coolant from the circulating path flows to the storage device through the second pressure relief device. The second set pressure is greater than the first set pressure.

[0089] It is easy to understand that, in the embodiments of the present application, by arranging the first pressure relief device and the second pressure relief device in cooperation, the circulating path of the air conditioner can realize the pressure relief process in two different ways, and the required pressure relief way can be determined according to the pressure in the circulating path, thereby being able to more stably adjust the pressure of the coolant in the circulating path, reduce the possibility of excessive pressure in the circulating path, reduce the possibility of pipe burst in the circulating path, and thereby ensure the heat exchange process of the circulating path.

[0090] In order to make the purposes, implementations and advantages of the present application clearer, the following will be a clear and complete description of the exemplary embodiments of the present application in conjunction with the accompanying drawings of the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments.

[0091] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the subsequently described embodiments, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0092] In addition, the terms "comprise" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device comprising a series of components does not have to be limited to the clearly listed components, but can include other components that are not clearly listed or inherent to these products or devices.

[0093] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0094] The terms "first", "second", and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0095] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0096] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0097] With reference to Figures 1-3 In a first aspect, the embodiments of the present application provide an air conditioner, comprising an indoor unit body 10, an outdoor unit body 20 and a circulation passage 100.

[0098] The circulation passage 100 comprises a compressor 110, a storage device 150, a first heat exchanger 120 and a second heat exchanger 130. The storage device 150 is in communication with the liquid inlet end of the compressor 110. The first heat exchanger 120 is arranged in the indoor unit body 10, and the second heat exchanger 130 is arranged in the outdoor unit body 20.

[0099] For example, the first heat exchanger 120 and the second heat exchanger 130 are in communication with the compressor 110, so that the refrigerant can flow in the circulation passage 100 to realize the heat exchange process of the indoor unit body 10 and the outdoor unit body.

[0100] By adopting the above technical solution, when it is needed to realize the refrigeration process of the indoor space by using the air conditioner, the first heat exchanger 120 arranged in the indoor unit body 10 can be set as an evaporator, the second heat exchanger 130 arranged in the outdoor unit body 20 can be set as a condenser, and the refrigerant can be set as a refrigerant.

[0101] In the circulation passage 100, the low-temperature and low-pressure refrigerant vapor enters the compressor 110, and the compressor 110 works to compress it into high-temperature and high-pressure vapor. The high-temperature and high-pressure vapor enters the condenser arranged in the outdoor unit body 20, releases heat to the external environment, and condenses into medium-temperature and high-pressure liquid. The medium-temperature and high-pressure liquid flows through the throttling device, and the pressure and temperature drop sharply, becoming a low-temperature and low-pressure mist mixture.

[0102] The low-temperature and low-pressure mist mixture enters the evaporator arranged in the indoor unit body 10, absorbs indoor heat, and completely evaporates into low-temperature and low-pressure vapor. The low-temperature and low-pressure vapor is again sucked into the compressor 110 to start the next cycle.

[0103] When it is needed to realize the heating process of the indoor space by using the air conditioner, the first heat exchanger 120 arranged in the indoor unit body 10 can be set as a condenser, the second heat exchanger 130 arranged in the outdoor unit body 20 can be set as an evaporator, and the refrigerant can be set as a heating agent.

[0104] In the circulation passage 100, the low-temperature and low-pressure refrigerant vapor enters the compressor 110, and the compressor 110 compresses the refrigerant vapor into high-temperature and high-pressure vapor. The high-temperature and high-pressure vapor enters the condenser located in the indoor unit body 10, and releases heat to the indoor environment, and is condensed into medium-temperature and high-pressure liquid. The medium-temperature and high-pressure liquid flows through the throttling device, and the pressure and temperature of the liquid are sharply reduced, and the liquid becomes a low-temperature and low-pressure mist mixture.

[0105] The low-temperature and low-pressure mist mixture enters the evaporator located in the outdoor unit body 20, absorbs external heat, and is completely evaporated into low-temperature and low-pressure vapor. The low-temperature and low-pressure vapor is again sucked into the compressor 110, and the next cycle begins.

[0106] In some possible embodiments, the air conditioner can include a first pressure relief device 200. The first pressure relief device 200 is arranged between the first heat exchanger 120 and the second heat exchanger 130, and the first pressure relief device 200 can be used to collect refrigerant from the circulation passage 100, so that the current pressure of the refrigerant in the circulation passage 100 can be reduced through the first pressure relief device 200.

[0107] For example, the air conditioner can include a second pressure relief device 300. The second pressure relief device 300 includes a pressure relief pipeline 310, a first end of the pressure relief pipeline 310 is arranged between the first heat exchanger 120 and the second heat exchanger 130, and a second end of the pressure relief pipeline 310 is in communication with the storage device 150, so that the refrigerant in the circulation passage 100 can flow to the storage device 150 through the pressure relief pipeline 310, to reduce the current pressure of the refrigerant in the circulation passage 100.

[0108] The second pressure relief device 300 can include a control valve 320. The control valve 320 can be arranged in the pressure relief pipeline 310, and the control valve 320 is at least used to control the opening and closing of the pressure relief pipeline 310, so that the opening and closing of the pressure relief pipeline 310 can be controlled through the control valve 320, to control the pressure relief process of the second pressure relief device 300.

[0109] When the pressure of the refrigerant in the circulation passage 100 is greater than a first set pressure, the refrigerant from the circulation passage 100 can be collected through the first pressure relief device 200, so that the pressure of the refrigerant in the circulation passage 100 can be reduced. When the pressure of the refrigerant in the circulation passage 100 is greater than or equal to a second set pressure, the second end of the second pressure relief device 300 can be controlled to be in communication with the storage device 150, and the refrigerant from the circulation passage 100 can flow to the storage device 150 through the second pressure relief device 300, and the second set pressure is greater than the first set pressure.

[0110] It is easy to understand that, in the embodiments of the present application, by setting the first pressure relief device 200 and the second pressure relief device 300 in cooperation, the circulating passage 100 of the air conditioner can realize the pressure relief process in two different ways, and the required pressure relief way can be determined according to the pressure in the circulating passage 100, so that the pressure of the refrigerant in the circulating passage 100 can be more stably adjusted, the possibility of overpressure of the circulating passage 100 can be reduced, and the possibility of pipe explosion of the circulating passage 100 can be reduced, so that the heat exchange process of the circulating passage 100 can be ensured.

[0111] With reference to Figures 1-3 In some embodiments of the present application, the first pressure relief device 200 can include a liquid storage structure 210, and the inlet end of the liquid storage structure 210 can be in communication with the circulating passage 100.

[0112] The first pressure relief device 200 can include a piston 220 movably arranged at the inlet end of the liquid storage structure 210 to open or close the inlet end of the liquid storage structure 210 by moving the piston 220.

[0113] For example, when the pressure inside the liquid storage structure 210 is less than the pressure of the circulating passage 100, the piston 220 can open the inlet end of the liquid storage structure 210, and the liquid storage structure 210 can receive the refrigerant from the circulating passage 100.

[0114] When the pressure of the circulating passage 100 is relatively large, for example, the pressure inside the liquid storage structure 210 is less than the pressure of the circulating passage 100, the refrigerant of the circulating passage 100 can push the piston 220 to move towards the inside of the liquid storage structure 210, the piston 220 can open the inlet end of the liquid storage structure 210, so that the refrigerant can flow from the circulating passage 100 to the liquid storage structure 210, and the liquid storage structure 210 can receive the refrigerant from the circulating passage 100, thereby reducing the flow of the refrigerant in the circulating passage 100 to realize the pressure relief process of the circulating passage 100 by the first pressure relief device 200.

[0115] When the pressure of the circulating passage 100 is relatively large, the piston 220 can move towards the outside of the liquid storage structure 210, the piston 220 can close the inlet end of the liquid storage structure 210, so that the refrigerant flows in the circulating passage 100, and the circulating passage 100 is not in communication with the liquid storage structure 210.

[0116] In some embodiments of the present application, an elastic member 240 can be arranged inside the liquid storage structure 210.

[0117] For example, the first end of the elastic member 240 is connected with the liquid storage structure 210, the second end of the elastic member 240 is connected with the piston 220, and the elastic member 240 can apply a force to the piston 220 to close the inlet end of the liquid storage structure 210.

[0118] When the pressure of the refrigerant in the circulation passage 100 is greater than the force of the elastic member 240 on the piston 220, the refrigerant can push the piston 220 to open the inlet end of the liquid storage structure 210, so that the refrigerant in the circulation passage 100 can flow into the liquid storage structure 210.

[0119] When the pressure of the refrigerant in the circulation passage 100 is less than the force of the elastic member 240 on the piston 220, the elastic member 240 can push the piston 220 to close the inlet end of the liquid storage structure 210, so that the refrigerant in the circulation passage 100 cannot flow into the liquid storage structure 210, and the elastic member 240 can drive the piston 220 to reset.

[0120] In addition, the elastic coefficient of the elastic member 240 can be determined according to the set pressure of the refrigerant in the circulation passage 100. When the set pressure of the refrigerant is greater than the force of the elastic member 240, the first pressure relief device 200 can receive the refrigerant from the circulation passage 100 through the liquid storage structure 210, and when the set pressure of the refrigerant is less than the force of the elastic member 240, the first pressure relief device 200 can be in a closed state, so that the pressure relief process of the first pressure relief device 200 is simpler.

[0121] For example, the first pressure relief device 200 can be provided with a vibration sensor 230, and the vibration sensor 230 can obtain the movement of the elastic member 240.

[0122] When the elastic member 240 is elastically deformed, the vibration sensor 230 can obtain the elastic movement of the elastic member 240, so as to obtain the elastic health of the elastic member 240 through the vibration sensor 230, and ensure the normal use of the elastic member 240.

[0123] When the elastic member 240 is elastically deformed, the vibration sensor 230 can obtain the elastic movement of the elastic member 240. For example, when the pressure of the refrigerant in the circulation passage 100 is equal to the force of the elastic member 240 on the piston 220, the piston 220 is in a relatively static state, and the elastic member 240 is in a balanced state, at this time the vibration sensor 230 can obtain the state of the elastic member 240, so as to obtain the pressure of the refrigerant in the circulation passage 100 through the pressure sensor 160, to determine the state of the second pressure relief device 300.

[0124] It should be noted that the force of the elastic member 240 is generally related to the extension and contraction amount of the elastic member 240. When the elastic member 240 is in a balanced state, the pressure of the refrigerant in the circulation passage 100 is uncertain, and thus the state of the elastic member 240 can be obtained by the vibration sensor 230. At this time, the refrigerant in the circulation passage 100 does not flow into the liquid storage structure 210, and the pressure of the refrigerant in the circulation passage 100 is relatively stable, so that the pressure obtained by the pressure sensor 160 is more accurate.

[0125] With reference to Figures 1-3 In some embodiments of the present application, the liquid storage structure 210 includes, in sequence from the direction away from the inlet end, a buffer flow channel 211, a Venturi flow channel 212, and a liquid storage portion 213. The piston 220 is movably arranged in the buffer flow channel 211, and can be close to or away from the inlet end.

[0126] For example, the diameter of the Venturi flow channel 212 is smaller than the diameter of the buffer flow channel 211, the diameter of the Venturi flow channel 212 is smaller than the diameter of the liquid storage portion 213, and at least part of the diameter of the liquid storage portion 213 is greater than the diameter of the buffer flow channel 211.

[0127] When the refrigerant in the circulation passage 100 flows into the liquid storage structure 210 through the inlet end, the refrigerant can flow from the buffer flow channel 211 to the Venturi flow channel 212, and then flow through the Venturi flow channel 212 to the liquid storage portion 213.

[0128] The diameter of the Venturi flow channel 212 is smaller than the diameter of the buffer flow channel 211, the diameter of the Venturi flow channel 212 is smaller than the diameter of the liquid storage portion 213, and at least part of the diameter of the liquid storage portion 213 is greater than the diameter of the buffer flow channel 211, so that the flow rate of the refrigerant can be increased when passing through the Venturi flow channel 212, a local low-pressure area is generated by using Bernoulli effect to achieve auxiliary pressure reduction, and finally the refrigerant enters the liquid storage portion 213.

[0129] At least part of the diameter of the liquid storage portion 213 is greater than the diameter of the buffer flow channel 211, so that the liquid storage portion 213 can absorb certain pressure fluctuations, thereby reducing the impact of the refrigerant in the liquid storage structure 210 on the piston 220. When the pressure inside the liquid storage structure 210 is greater than the pressure of the circulation passage 100, the piston 220 can be slowly pushed by the refrigerant, so that the piston 220 can slowly close the inlet end of the liquid storage structure 210, and can play a certain protection role on the elastic member 240, reducing the possibility of damage of the elastic member 240 and the like.

[0130] With reference to Figures 1-3 In some embodiments of the present application, the circulation passage 100 includes a reversing valve 140. The liquid inlet of the reversing valve 140 is in communication with the liquid outlet of the compressor 110, and the liquid return of the reversing valve 140 is in communication with the liquid return of the compressor 110.

[0131] For example, the first switching port of the switching valve 140 is communicated with the first heat exchanger 120, and the second switching port of the switching valve 140 is communicated with the second heat exchanger 130, so that the switching valve 140 can guide the refrigerant from the compressor 110 to the first heat exchanger 120, and then to the second heat exchanger 130, and can also guide the refrigerant from the compressor 110 to the second heat exchanger 130, and then to the first heat exchanger 120, so that the refrigerant can flow in different directions to realize the switching of the refrigeration and heating processes of the air conditioner.

[0132] The first end of the pressure relief pipeline 310 can be arranged between the first heat exchanger 120 and the second heat exchanger 130, and the second end of the pressure relief pipeline 310 can be located between the liquid return port of the switching valve 140 and the liquid return end of the compressor 110.

[0133] The pressure relief pipeline 310 can directly guide the refrigerant between the first heat exchanger 120 and the second heat exchanger 130 to the liquid return end of the compressor 110, thereby shortening the flow path of the refrigerant and improving the pressure relief efficiency of the second pressure relief device 300.

[0134] In summary, when the pressure of the refrigerant in the circulation passage 100 is greater than the first set pressure, the refrigerant from the circulation passage 100 can be collected by the first pressure relief device 200, so that the pressure of the refrigerant in the circulation passage 100 can be reduced. When the pressure of the refrigerant in the circulation passage 100 is greater than or equal to the second set pressure, the second end of the second pressure relief device 300 is controlled to be communicated with the storage device 150, and the refrigerant from the circulation passage 100 flows to the storage device 150 through the second pressure relief device 300, and the second set pressure is greater than the first set pressure.

[0135] It is easy to understand that in the embodiments of the present application, by arranging the first pressure relief device 200 and the second pressure relief device 300 in cooperation, the circulation passage 100 of the air conditioner can realize the pressure relief process in two different ways, and the required pressure relief way can be determined according to the pressure in the circulation passage 100, so that the pressure of the refrigerant in the circulation passage 100 can be more stably adjusted, the possibility of overpressure of the circulation passage 100 can be reduced, and the possibility of pipe explosion of the circulation passage 100 can be reduced, so that the heat exchange process of the circulation passage 100 can be ensured.

[0136] Referring to Figure 1 , Figures 4-6 In a second aspect, the embodiments of the present application provide an air conditioner, which comprises an indoor unit body 10, an outdoor unit body 20 and a circulation passage 100.

[0137] The circulation passage 100 comprises a compressor 110, a storage device 150, a first heat exchanger 120 and a second heat exchanger 130, the storage device 150 is in communication with the liquid inlet end of the compressor 110, the first heat exchanger 120 is arranged in the indoor unit body 10, and the second heat exchanger 130 is arranged in the outdoor unit body 20.

[0138] For example, the first heat exchanger 120, the second heat exchanger 130 and the compressor 110 are in communication, so that the refrigerant can flow in the circulation passage 100 to realize the heat exchange process of the indoor unit body 10 and the outdoor unit body.

[0139] In some possible embodiments, the air conditioner can comprise a first pressure relief device 200. The first pressure relief device 200 is arranged between the first heat exchanger 120 and the second heat exchanger 130, and the first pressure relief device 200 can be used to collect the refrigerant from the circulation passage 100, so as to reduce the current pressure of the refrigerant in the circulation passage 100 through the first pressure relief device 200.

[0140] For example, the air conditioner can comprise a second pressure relief device 300. The second pressure relief device 300 comprises a pressure relief pipeline 310, a first end of the pressure relief pipeline 310 is arranged between the first heat exchanger 120 and the second heat exchanger 130, and a second end of the pressure relief pipeline 310 is in communication with the storage device 150, so that the refrigerant in the circulation passage 100 can flow to the storage device 150 through the pressure relief pipeline 310 to reduce the current pressure of the refrigerant in the circulation passage 100.

[0141] The second pressure relief device 300 can comprise a control valve 320. The control valve 320 can be arranged in the pressure relief pipeline 310, and the control valve 320 is at least used to control the opening and closing of the pressure relief pipeline 310, so as to control the opening and closing of the pressure relief pipeline 310 through the control valve 320 to control the pressure relief process of the second pressure relief device 300.

[0142] In some embodiments of the present application, the air conditioner can comprise a control device which can be used to execute the control method of the air conditioner. The control device can be configured to:

[0143] S101, when the pressure of the refrigerant in the circulation passage 100 is greater than a first set pressure, the second end of the second pressure relief device 300 is controlled to be not in communication with the storage device 150, and the refrigerant from the circulation passage 100 is collected through the first pressure relief device 200.

[0144] S102, when the pressure of the refrigerant in the circulation passage 100 is greater than or equal to a second set pressure, the second end of the second pressure relief device 300 is controlled to be in communication with the storage device 150, the refrigerant from the circulation passage 100 flows to the storage device 150 through the second pressure relief device 300, and the second set pressure is greater than the first set pressure.

[0145] By adopting the above technical solution, when the pressure of the refrigerant in the circulation passage 100 is greater than the first set pressure, the second end of the second pressure relief device 300 is controlled to be not communicated with the storage device 150, and the refrigerant from the circulation passage 100 can be collected through the first pressure relief device 200, so that the pressure of the refrigerant in the circulation passage 100 can be reduced.

[0146] When the pressure of the refrigerant in the circulation passage 100 is greater than or equal to the second set pressure, the second end of the second pressure relief device 300 is controlled to be communicated with the storage device 150, so that the refrigerant from the circulation passage 100 can flow to the storage device 150 through the second pressure relief device 300, and the second set pressure is greater than the first set pressure.

[0147] It is easy to understand that in the embodiments of the present application, by setting the matched first pressure relief device 200 and the second pressure relief device 300, the circulation passage 100 of the air conditioner can realize the pressure relief process through two different ways, and the required pressure relief way can be determined according to the pressure in the circulation passage 100, so that the pressure of the refrigerant in the circulation passage 100 can be more stably adjusted, the possibility of the overlarge pressure of the circulation passage 100 can be reduced, and the possibility of the phenomenon such as pipe explosion of the circulation passage 100 can be reduced, so that the heat exchange process of the circulation passage 100 can be ensured.

[0148] In some embodiments of the present application, the control device is configured to:

[0149] In the process of collecting the refrigerant from the circulation passage 100 through the first pressure relief device 200, when the pressure of the refrigerant in the circulation passage 100 is less than or equal to the first threshold value, the first pressure relief device 200 is in a closed state, and the first threshold value is lower than the first set pressure.

[0150] By setting the first threshold value, the first threshold value is lower than the first set pressure, so that a certain buffer space can be provided for the first pressure relief device 200, the possibility of repeated opening and closing of the first pressure relief device 200 due to unstable pressure can be reduced, and the use process of the first pressure relief device 200 is more stable.

[0151] In the process of collecting the refrigerant from the circulation passage 100 through the second pressure relief device 300, when the pressure of the refrigerant in the circulation passage 100 is less than or equal to the second threshold value, the second pressure relief device 300 is controlled to be in a closed state, and the second threshold value is lower than the second set pressure.

[0152] By setting the second threshold value, the second threshold value is lower than the second set pressure, so that a certain buffer space can be provided for the second pressure relief device 300, the possibility of repeated opening and closing of the second pressure relief device 300 due to unstable pressure can be reduced, and the use process of the second pressure relief device 300 is more stable.

[0153] In the process of collecting the refrigerant from the circulation passage 100 through the second pressure relief device 300, if the pressure change rate is low, even when the refrigerant pressure in the circulation passage 100 rises, the control device can determine that the pressure is out of limit, and thus alarm shutdown to reduce the possibility of damage and other conditions of the air conditioner.

[0154] In some embodiments of the present application, the control device is configured to obtain the pressure change rate of the refrigerant in the circulation passage 100, which is determined according to the pressure of the refrigerant and the flow time of the refrigerant.

[0155] For example, the pressure of the refrigerant can be obtained in a unit of time, so that the difference of the refrigerant pressure can be obtained, and the pressure change rate of the refrigerant can be obtained through the difference of the refrigerant pressure and the time interval between the two times of obtaining the refrigerant pressure.

[0156] When the pressure of the refrigerant in the circulation passage 100 is greater than the first set pressure, and the pressure change rate of the refrigerant in the circulation passage 100 is less than or equal to the set rate, the second end of the second pressure relief device 300 is communicated with the storage device 150, and the refrigerant from the circulation passage 100 flows to the storage device 150 through the second pressure relief device 300.

[0157] When the pressure of the refrigerant in the circulation passage 100 is greater than the first set pressure, and the pressure change rate of the refrigerant in the circulation passage 100 is less than or equal to the set rate, the pressure relief effect of the first pressure relief device 200 is poor, and the pressure change of the refrigerant in the circulation passage 100 is slow, so that the pressure relief process can be realized synchronously through the second pressure relief device 300 and the first pressure relief device 200, thereby improving the pressure relief efficiency.

[0158] By obtaining the pressure change rate of the refrigerant in the circulation passage 100, the opening and closing of the second pressure relief device 300 can be controlled according to the pressure change rate of the refrigerant in the circulation passage 100, so that the control process of the second pressure relief device 300 is more reasonable.

[0159] For example, when the pressure change rate is equal to the first change rate, the second pressure relief device can always be in an open state, when the pressure change rate is between the first change rate and the second change rate, the second pressure relief device can be periodically opened, and when the pressure change rate is the second change rate, the second pressure relief device can be continuously opened, and the second change rate is lower than the first change rate.

[0160] In some embodiments of the present application, the control process of the air conditioner can refer to the following implementation.

[0161] When the air conditioner is in a working state, the pressure of the refrigerant in the circulation passage 100 can be obtained by the pressure sensor 160 located in the circulation passage 100, and the pressure sensor 160 can transmit the pressure of the refrigerant to the control device.

[0162] When the air conditioner is in operation, when the pressure of the refrigerant in the circulation passage 100 is between the first set pressure and the second set pressure, and the rate of change of the pressure of the refrigerant in the circulation passage 100 is greater than the set rate, the control device can control the second end of the second pressure relief device 300 not to communicate with the storage device 150.

[0163] The refrigerant in the circulation passage 100 can push the piston 220 to move towards the inside of the liquid storage structure 210, and the piston 220 can open the inlet end of the liquid storage structure 210, so that the refrigerant can flow from the circulation passage 100 into the liquid storage structure 210, and the liquid storage structure 210 receives the refrigerant from the circulation passage 100, thereby being able to play a certain pressure relief role on the refrigerant in the circulation passage 100 through the first pressure relief device 200.

[0164] In the process of collecting the refrigerant from the circulation passage 100 through the first pressure relief device 200, when the pressure of the refrigerant in the circulation passage 100 is less than or equal to the first threshold value, the first pressure relief device 200 is in a closed state. The first threshold value is lower than the first set pressure, for example, the difference between the first threshold value and the first set pressure can be set to 0.1 MPa.

[0165] When the pressure of the refrigerant in the circulation passage 100 is between the first set pressure and the second set pressure, and the rate of change of the pressure of the refrigerant in the circulation passage 100 is less than or equal to the set rate, or when the pressure of the refrigerant in the circulation passage 100 is greater than the second set pressure, the control device can control the second end of the second pressure relief device 300 to communicate with the storage device 150, and the refrigerant from the circulation passage 100 flows to the storage device 150 through the second pressure relief device 300.

[0166] In the process of collecting the refrigerant from the circulation passage 100 through the second pressure relief device 300, when the pressure of the refrigerant in the circulation passage 100 is less than or equal to the second threshold value, the second pressure relief device 300 is controlled to be in a closed state. The second threshold value is lower than the second set pressure, for example, the difference between the second threshold value and the second set pressure can be set to 0.1 MPa.

[0167] The control device of the air conditioner provided in the embodiments of the present application can perform the control method of the air conditioner in any of the above embodiments, and the principles and technical effects are similar, which will not be described here.

[0168] The present application also provides a computer program product, comprising a computer program, which is executed by a processor to implement the above method.

[0169] The present application also provides a computer readable storage medium, which stores computer execution instructions, and when a processor executes the computer execution instructions, the above method is implemented.

[0170] The above-mentioned readable storage medium can be realized by any type of volatile or nonvolatile storage devices or their combinations, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special purpose computer.

[0171] An exemplary readable storage medium is coupled to the processor, so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in the device.

[0172] The division of units is only a logical functional division, and in actual implementation, there can be another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0173] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0174] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0175] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the parts of the technical solutions that essentially contribute to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the method of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0176] Those of ordinary skill in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction-related hardware. The aforementioned program can be stored in a computer readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, a magnetic disk or an optical disk, and various media that can store program codes.

[0177] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0178] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. An air conditioner, characterized in that, include: Indoor unit and outdoor unit; A circulation path, the circulation path including a compressor, a storage device, a first heat exchanger and a second heat exchanger; The storage device is connected to the liquid inlet of the compressor; the first heat exchanger is disposed on the indoor unit body, the second heat exchanger is disposed on the outdoor unit body, and the first heat exchanger and the second heat exchanger are connected to the compressor; A first pressure relief device is disposed between the first heat exchanger and the second heat exchanger, and the first pressure relief device can be used to collect refrigerant from the circulation path. A second pressure relief device, the second pressure relief device comprising: A pressure relief pipeline, wherein the first end of the pressure relief pipeline is disposed between the first heat exchanger and the second heat exchanger, and the second end of the pressure relief pipeline is connected to the storage device; A control valve is provided in the pressure relief line, and the control valve is used at least to control the opening and closing of the pressure relief line.

2. The air conditioner according to claim 1, characterized in that, The first pressure relief device includes: A liquid storage structure, wherein the inlet end of the liquid storage structure is connected to the circulation passage; The piston is movably disposed at the inlet end of the liquid storage structure; The first pressure relief device is configured such that when the pressure inside the liquid storage structure is less than the pressure in the circulation passage, the piston can open the inlet end of the liquid storage structure, and the liquid storage structure receives refrigerant from the circulation passage.

3. The air conditioner according to claim 2, characterized in that, The liquid storage structure is equipped with an elastic element inside; The first end of the elastic element is connected to the liquid storage structure, and the second end of the elastic element is connected to the piston. The elastic element can apply a force to the piston to close the inlet end of the liquid storage structure.

4. The air conditioner according to claim 3, characterized in that, The first pressure relief device is equipped with a vibration sensor, which can detect the movement of the elastic element.

5. The air conditioner according to claim 2, characterized in that, The liquid storage structure includes a buffer channel, a venturi channel and a liquid storage section arranged sequentially along the direction away from the inlet end; The piston is movably disposed within the buffer channel; The diameter of the Venturi channel is smaller than the diameter of the buffer channel, the diameter of the Venturi channel is smaller than the diameter of the liquid reservoir, and at least a portion of the diameter of the liquid reservoir is larger than the diameter of the buffer channel.

6. The air conditioner according to any one of claims 1-5, characterized in that, The circulation path includes a reversing valve, the inlet of which is connected to the outlet of the compressor, and the return port of which is connected to the return port of the compressor. The first reversing port of the reversing valve is connected to the first heat exchanger, and the second reversing port of the reversing valve is connected to the second heat exchanger.

7. The air conditioner according to claim 6, characterized in that, The first end of the pressure relief pipeline is located between the first heat exchanger and the second heat exchanger, and the second end of the pressure relief pipeline is located between the return port of the reversing valve and the return port of the compressor.

8. An air conditioner, characterized in that, include: Indoor unit and outdoor unit; A circulation path, the circulation path including a compressor, a storage device, a first heat exchanger and a second heat exchanger; The storage device is connected to the liquid inlet of the compressor; the first heat exchanger is disposed on the indoor unit body, the second heat exchanger is disposed on the outdoor unit body, and the first heat exchanger and the second heat exchanger are connected to the compressor; A first pressure relief device is disposed between the first heat exchanger and the second heat exchanger, and the first pressure relief device can be used to collect refrigerant from the circulation path. The second pressure relief device has a first end located between the first heat exchanger and the second heat exchanger, and a second end connected to the storage device. The air conditioner includes a control device, the control device being configured to: When the pressure of the refrigerant in the circulation path is greater than the first set pressure, the second end of the second pressure relief device is controlled to not be connected to the storage device, and the refrigerant from the circulation path is collected through the first pressure relief device. When the pressure of the refrigerant in the circulation path is greater than or equal to the second set pressure, the second end of the second pressure relief device is connected to the storage device, and the refrigerant from the circulation path flows to the storage device through the second pressure relief device, and the second set pressure is greater than the first set pressure.

9. The air conditioner according to claim 8, characterized in that, The control device is configured as follows: During the process of collecting refrigerant from the circulation path through the first pressure relief device, when the pressure of the refrigerant in the circulation path is less than or equal to a first threshold, the first pressure relief device is in a closed state, and the first threshold is lower than the first set pressure. During the process of collecting refrigerant from the circulation path through the second pressure relief device, when the pressure of the refrigerant in the circulation path is less than or equal to the second threshold, the second pressure relief device is controlled to be in a closed state, and the second threshold is lower than the second set pressure.

10. The air conditioner according to claim 8, characterized in that, The control device is configured as follows: The pressure change rate of the refrigerant in the circulation path is obtained, and the pressure change rate is determined based on the pressure of the refrigerant and the refrigerant flow time. When the pressure of the refrigerant in the circulation path is greater than the first set pressure, and the pressure change rate of the refrigerant in the circulation path is less than or equal to the set rate, the second end of the second pressure relief device is connected to the storage device, and the refrigerant from the circulation path flows to the storage device through the second pressure relief device.

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