Fluid storage device, air conditioner and defrosting control method

Abstract

The present application relates to the technical field of fluid, and provides a fluid storage device, an air conditioner and a defrosting control method.The fluid storage device comprises a shell, a guide slide and a valve core.The shell is provided with a storage cavity, a gas port and a liquid port which are communicated with the storage cavity.The guide slide is arranged in the storage cavity and is communicated with the storage cavity.The two ends of the guide slide are communicated with the gas port and the liquid port.The valve core is movably arranged in the guide slide and is adapted to switch between a first position and a second position.In the first position, the storage cavity stores gas, and the valve core closes the liquid port.In the second position, the storage cavity stores liquid, and the valve core closes the gas port.The present application can store gas or liquid according to requirements, realizes the function of one thing with multiple uses, and can realize the full gas and full liquid self-locking effect, and has the characteristics of simple structure, high reliability and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fluid technology, in particular to a fluid storage device, an air conditioner and a defrosting control method. BACKGROUND

[0002] In the related art, different special storage devices are generally used to store fluids such as gas and liquid. The fluid storage function of the storage device is single, and the storage device cannot be effectively filled, has poor sealing effect and low reliability. SUMMARY

[0003] The present application provides a fluid storage device, an air conditioner and a defrosting control method to solve the defect of single fluid storage function of the storage device in the related art. The gas or liquid can be stored according to the demand, the function of one thing for multiple purposes can be realized, and the full gas and full liquid self-locking effect can be realized. The present application has the characteristics of simple structure, high reliability and the like.

[0004] The present application provides a fluid storage device, comprising:

[0005] A housing is provided with a storage cavity, a gas port and a liquid port communicating with the storage cavity;

[0006] A guide chute is arranged in the storage cavity and communicates with the storage cavity, and the two ends of the guide chute communicate with the gas port and the liquid port;

[0007] A valve core is movably arranged in the guide chute and is adapted to switch between a first position and a second position,

[0008] In the first position, the storage cavity stores gas, and the valve core closes the liquid port;

[0009] In the second position, the storage cavity stores liquid, and the valve core closes the gas port.

[0010] According to the fluid storage device provided by the present application, the valve core is an elastic valve core.

[0011] According to the fluid storage device provided by the present application, the valve core is a floating ball, and the upper and lower ends of the housing are respectively provided with a first sealing part and a second sealing part in the shape of a hemisphere. The first sealing part is provided with the gas port, and the second sealing part is provided with the liquid port;

[0012] In the first position, the floating ball is in sealing connection with the second sealing part;

[0013] In the second position, the floating ball is in sealing connection with the first sealing part.

[0014] The guiding slide is formed by at least three guiding rods.

[0015] The gas port is connected with a gas pipe, and the liquid port is connected with a liquid pipe.

[0016] The shell is a pressure-resistant container.

[0017] The application further provides an air conditioner, which comprises an indoor heat exchanger, an outdoor heat exchanger and the fluid storage device.

[0018] The flow path diameter of the liquid pipe is greater than that of the electronic expansion valve.

[0019] The application further provides an air conditioner, which further comprises:

[0020] A compressor;

[0021] A four-way valve, a first end of the four-way valve being connected with a gas outlet of the compressor, a second end of the four-way valve being connected with a gas inlet of the compressor, a third end of the four-way valve being connected with a gas inlet pipe of the indoor heat exchanger, and a fourth end of the four-way valve being connected with the outdoor heat exchanger.

[0022] The application further provides an air conditioner, wherein the liquid pipe is provided with a control valve, which is used for controlling the liquid pipe to be closed in a cooling mode and to be opened in a heating mode or a defrosting mode.

[0023] The application further provides an air conditioner, wherein the control valve is a thermal cut-off valve, and a ring temperature sensing bulb is connected with the thermal cut-off valve, and the ring temperature sensing bulb is used for controlling the on-off of the thermal cut-off valve.

[0024] The application further provides a defrosting control method of the air conditioner.

[0025] The operation mode of the air conditioner is obtained.

[0026] When the air conditioner is determined to be in a defrosting mode, the liquid pipe is controlled to be opened.

[0027] The application further provides a defrosting control method of the air conditioner.

[0028] When the air conditioner is determined to be in a cooling mode, the liquid pipe is controlled to be closed.

[0029] Determine that the air conditioner runs to the heating mode, control the liquid pipe to open.

[0030] The fluid storage device, air conditioner and defrosting control method provided by the application can store gas or liquid according to the pressure difference between the gas port and the liquid port, realize the function of one thing serving multiple purposes, and realize the full-gas and full-liquid self-locking effect, and have the characteristics of simple structure, high reliability and the like. In addition, by applying the fluid storage device to the air conditioner, the refrigerant liquid in the outdoor heat exchanger can be quickly emptied after the air conditioner switches to the defrosting mode, the high-temperature refrigerant gas generated by the compressor can be more quickly and widely contacted with the inner wall of the outdoor heat exchanger coil, the exhaust temperature of the compressor can be improved, the high-temperature refrigerant gas with higher temperature can be introduced into the outdoor heat exchanger, the defrosting time can be effectively shortened, and the purpose of rapid defrosting is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the application or the related art, the following will briefly introduce the drawings needed to be used in the embodiments or the related art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Figure 1 is a structural schematic diagram of the fluid storage device provided by the application;

[0033] Figure 2 is a structural schematic diagram of the air conditioner provided by the application;

[0034] Figure 3 is a schematic diagram of the refrigeration mode principle of the air conditioner provided by the application;

[0035] Figure 4 is a schematic diagram of the heating mode principle of the air conditioner provided by the application;

[0036] Figure 5 is a schematic diagram of the defrosting mode principle of the air conditioner provided by the application;

[0037] Figure 6 is a flow schematic diagram of the defrosting control method of the air conditioner provided by the application.

[0038] Reference signs:

[0039] 100: fluid storage device; 101: shell; 1011: storage cavity; 1012: gas port;

[0040] 1013: liquid port; 1014: first sealing part; 1015: second sealing part;

[0041] 102: guide chute; 1021: guide rod; 103: valve core; 104: air pipe;

[0042] 105: liquid pipe;

[0043] 200: indoor heat exchanger; 201: air inlet pipe; 300: outdoor heat exchanger;

[0044] 400: electronic expansion valve; 500: compressor; 600: four-way valve;

[0045] 700: thermal cut-off valve; 800: capillary; 900: ring temperature bulb. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions will be described below in conjunction with the accompanying drawings in the present application. Obviously, the described embodiments are only some, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0047] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "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 embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements 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 embodiments of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0048] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" 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. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0049] In the embodiments of the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0050] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0051] The following will be described in combination with Figures 1-6 The fluid storage device, air conditioner and defrosting control method of the present application are described.

[0052] According to the embodiments of the first aspect of the present application, with reference to Figures 1-5 The fluid storage device 100 provided by the present application mainly comprises a housing 101, a guide chute 102 and a valve core 103.

[0053] The housing 101 is internally provided with a storage cavity 1011, and the housing 101 is provided with a gas port 1012 and a liquid port 1013 at both ends, the gas port 1012 and the liquid port 1013 are respectively communicated with the storage cavity 1011, the gas port 1012 can be used to send gas into the storage cavity 1011, or the gas in the storage cavity 1011 can be discharged through the gas port 1012; the liquid port 1013 can be used to send liquid into the storage cavity 1011, or the liquid in the storage cavity 1011 can be discharged through the liquid port 1013.

[0054] The guiding slide 102 is arranged in the storage cavity 1011 and communicates with the storage cavity 1011, and two ends of the guiding slide 102 communicate with the gas port 1012 and the liquid port 1013 respectively; the valve core 103 is movably arranged in the guiding slide 102 and is adapted to switch between the first position and the second position, wherein when the valve core 103 is in the first position, the storage cavity 1011 stores gas and the valve core 103 closes the liquid port 1013; when the valve core 103 is in the second position, the storage cavity 1011 stores liquid and the valve core 103 closes the gas port 1012. Wherein, the guiding slide 102 can guide the movement of the valve core 103, so that the valve core 103 can accurately move to the gas port 1012 or the liquid port 1013, thereby improving the sealing self-locking effect.

[0055] Specifically, when the pressure of the gas port 1012 is greater than the pressure of the liquid port 1013, the gas enters the storage cavity 1011 from the gas port 1012, extrudes the gas in the storage cavity 1011, and at the same time, the valve core 103 is extruded by the gas and moves to the liquid port 1013, when the valve core 103 moves to closely contact with the liquid port 1013, the storage of the gas and the sealing self-locking are completed.

[0056] Similarly, when the pressure of the liquid port 1013 is greater than the pressure of the gas port 1012, the liquid enters the storage cavity 1011 from the liquid port 1013, extrudes the gas in the storage cavity 1011, and at the same time, the valve core 103 is extruded by the liquid and moves to the gas port 1012, when the valve core 103 moves to closely contact with the gas port 1012, the storage of the liquid and the sealing self-locking are completed.

[0057] Therefore, the fluid storage device 100 provided by the embodiment of the application can store gas or liquid according to the pressure difference between the gas port 1012 and the liquid port 1013, realize the function of one thing with multiple uses, and can realize the full gas and full liquid self-locking effect, and has the characteristics of simple structure, high reliability and the like.

[0058] According to one embodiment of the application, the valve core 103 is an elastic valve core, that is, the valve core 103 can be deformed under force, so that the valve core 103 can tightly close the gas port 1012 or the liquid port 1013 under the action of gas pressure or liquid pressure, thereby improving the sealing effect.

[0059] According to one embodiment of the application, with reference to Figure 1As shown, the valve core 103 is a floating ball, and the upper and lower ends of the shell 101 are respectively provided with a first sealing part 1014 and a second sealing part 1015 in the shape of a hemisphere, that is, the upper end of the shell 101 is provided with the first sealing part 1014 in the shape of a hemisphere, and the lower end of the shell 101 is provided with the second sealing part 1015 in the shape of a hemisphere, the shapes of the first sealing part 1014 and the second sealing part 1015 are matched with the shape of the floating ball, so as to facilitate sealing; the first sealing part 1014 is provided with a gas port 1012, and the second sealing part 1015 is provided with a liquid port 1013; when the floating ball moves to the first position, the floating ball is sealingly connected with the second sealing part 1015 at the lower end; when the floating ball moves to the second position, the floating ball is sealingly connected with the first sealing part 1014 at the upper end.

[0060] According to the embodiment of the present application, the valve core 103 is arranged as a flexible ball, and the sealing part matched with the shape of the valve core 103 is arranged, so that the sealing and self-locking effect can be effectively improved.

[0061] According to one embodiment of the present application, the floating ball can be in a hollow structure.

[0062] In addition, the specific material of the floating ball is not particularly limited, for example, the material can be plastic, metal or the like, and the specific material can be designed according to actual needs.

[0063] It can be understood that the valve core 103 can also be arranged in the shape of a square or the like for facilitating sealing, and the shape of the sealing part is also arranged in the shape of a square.

[0064] According to one embodiment of the present application, the guide slide 102 is composed of at least three guide rods 1021. In this way, on the one hand, the movement of the valve core 103 can be guided, and on the other hand, the guide slide 102 can be in communication with the storage cavity 1011, so that the entering gas or liquid can push the valve core 103 to move for sealing and self-locking while extruding the gas inside the storage cavity 1011.

[0065] In one specific example, four guide rods 1021 are arranged, and the guide slide 102 is composed of the four guide rods 1021 which are uniformly and vertically distributed, and the valve core 103 can only move up and down in the guide slide 102.

[0066] According to one embodiment of the present application, the gas port 1012 is connected with a gas pipe 104, and the liquid port 1013 is connected with a liquid pipe 105, so as to better send in or discharge the fluid.

[0067] According to one embodiment of the present application, the shell 101 is a pressure-resistant container, so as to improve the safety of the whole device.

[0068] The fluid storage device 100 provided by the present application will be described below in combination with one specific example.

[0069] As Figure 1 The fluid storage device 100 mainly includes a hollow pressure-resistant container, four metal guide rods 1021, and a hollow metal floating ball. The upper end of the pressure-resistant container is provided with a hemispherical first sealing part 1014, and the first sealing part 1014 is connected with an air pipe 104 leading to the outside. The lower end of the pressure-resistant container is provided with a hemispherical second sealing part 1015, and the second sealing part 1015 is connected with a liquid pipe 105 leading to the outside. The first sealing part 1014 and the second sealing part 1015 can be combined with the metal floating ball to form a seal. The four guide rods 1021 are arranged around the pressure-resistant container to form a guide slide 102. The metal floating ball is limited and constrained by the four guide rods 1021 and can only move up and down in the guide slide 102 formed by the four guide rods 1021.

[0070] The working principle mainly includes: when the pressure of the air pipe 104 is greater than the pressure of the liquid pipe 105, the gas enters the pressure-resistant container from the air pipe 104, is squeezed by the upper gas, and the metal floating ball falls into the lower second sealing part 1015. The metal floating ball forms a seal with the second sealing part 1015. At this time, the pressure-resistant container is full of gas. When the pressure of the liquid pipe 105 is greater than the pressure of the air pipe 104, the liquid enters the pressure-resistant container from the liquid pipe 105, the metal floating ball rises under the action of the liquid buoyancy, reaches the first sealing part 1014, and forms a seal with the first sealing part 1014 under the squeezing action of the liquid. At this time, the pressure-resistant container is full of liquid.

[0071] In the related art, when the air conditioner is running in the heating mode in winter, the outdoor heat exchanger is easy to frost when the outdoor environment humidity is large. After detecting the frost, the air conditioner switches the flow direction of the four-way reversing valve, switches the heating mode to the cooling mode. At this time, the high-temperature refrigerant gas generated by the compressor enters from the air pipe of the outdoor heat exchanger, and the low-temperature refrigerant liquid in the original outdoor heat exchanger enters the indoor heat exchanger through the electronic expansion valve. The high-temperature refrigerant gas condenses and releases heat in the outdoor heat exchanger to achieve the effect of defrosting.

[0072] This scheme is a traditional defrosting scheme for the air conditioner, and at least includes the following technical problems:

[0073] (1) After the air conditioner is switched from the heating mode to the cooling mode, a large amount of low-temperature refrigerant liquid in the original outdoor heat exchanger needs to pass through the electronic expansion valve to enter the indoor heat exchanger. Since the electronic expansion valve has a small diameter, the transfer speed of the refrigerant liquid between the outdoor heat exchanger and the indoor heat exchanger is slow, that is, the liquid level of the refrigerant liquid in the outdoor heat exchanger drops slowly, resulting in that the refrigerant liquid in the outdoor heat exchanger cannot be emptied for a long time, occupies the heat exchange area of the inner wall of the coil, and the high-temperature refrigerant gas generated by the compressor cannot be in contact with the inside of the coil in time, affecting the defrosting speed. Only by waiting for the refrigerant liquid level to drop from top to bottom can the defrosting speed be slow.

[0074] (2) When designing the finned outdoor heat exchanger, the aluminum foil fins are arranged vertically to facilitate drainage, and the coil is arranged transversely with the aluminum foil fins arranged vertically, which causes the liquid level of the refrigerant in the coil to drop in the axial horizontal direction, resulting in the upper half of the coil being filled with gas and the lower half being filled with liquid, which increases the contact area between the liquid and the gas. When defrosting, a portion of the heat of the high-temperature refrigerant gas entering the outdoor heat exchanger coil is absorbed by the low-temperature refrigerant liquid, resulting in a decrease in the heat available for effective defrosting, thereby leading to poor defrosting effect.

[0075] (3) After defrosting, the refrigerant liquid still needs to enter the outdoor heat exchanger from the indoor heat exchanger through the electronic expansion valve, and the process is also slow, occupying effective heating time and affecting the heating effect.

[0076] (4) When starting defrosting, the low-temperature refrigerant liquid in the outdoor heat exchanger enters the indoor heat exchanger to become high-temperature liquid, absorbing a certain amount of sensible heat, and after defrosting, this portion of refrigerant liquid needs to return to the outdoor heat exchanger to become low-temperature state, and the absorbed sensible heat needs to be flashed out again to be given to the indoor heat exchanger by the compressor again. This portion of heat consumption is a useless consumption, causing a certain amount of energy waste and affecting the overall energy efficiency.

[0077] Therefore, the fluid storage device 100 of the above embodiment is ingeniously applied to the air conditioner, which can solve at least one of the above technical problems in the related art.

[0078] According to the embodiment of the second aspect of the present application, referring to Figures 2-5 The present application also provides an air conditioner, mainly comprising: an indoor heat exchanger 200, an outdoor heat exchanger 300, and the fluid storage device 100 of the above embodiment, an electronic expansion valve 400 is arranged between the indoor heat exchanger 200 and the outdoor heat exchanger 300, the gas port 1012 of the fluid storage device 100 is connected to the gas inlet pipe 201 of the indoor heat exchanger 200 through the gas pipe 104, and the liquid port 1013 of the fluid storage device 100 is connected between the outdoor heat exchanger 300 and the electronic expansion valve 400 through the liquid pipe 105, and the liquid pipe 105 is openable and closable; wherein the flow path diameter of the liquid pipe 105 is larger than the flow path diameter of the electronic expansion valve 400, that is, the liquid resistance of the liquid pipe 105 is smaller than the liquid resistance of the electronic expansion valve 400.

[0079] According to one embodiment of the present application, the air conditioner further comprises: a compressor 500 and a four-way valve 600, the first end of the four-way valve 600 is connected to the exhaust port of the compressor 500, the second end of the four-way valve 600 is connected to the suction port of the compressor 500, the third end of the four-way valve 600 is connected to the gas inlet pipe 201 of the indoor heat exchanger 200, and the fourth end of the four-way valve 600 is connected to the outdoor heat exchanger 300. By switching the four-way valve 600, the switching of the operation mode of the air conditioner can be realized.

[0080] The following is combined Figures 3-5 The operating modes of the air conditioner provided by this invention are described, generally including: summer cooling mode, winter heating mode, and winter defrosting mode. The flow direction of the fluid medium is shown by the arrows in the figure.

[0081] like Figure 3 As shown, in summer cooling mode: during normal cooling operation in summer, the liquid pipe 105 is in the closed state, and the fluid storage device 100 is in the open circuit state and does not function.

[0082] The first and fourth ends of the four-way valve 600 are connected, and the second and third ends are connected. The high-temperature refrigerant gas generated by the compressor 500 flows into the outdoor heat exchanger 300 through the first and fourth ends of the four-way valve 600, where it is condensed and releases heat. It then flows through the electronic expansion valve 400 for throttling, and then through the indoor heat exchanger 200 for evaporation and heat absorption. Finally, it flows back to the compressor 500 through the third and second ends of the four-way valve 600.

[0083] like Figure 4 As shown, in winter heating mode: During normal heating operation in winter, the liquid pipe 105 is open, and point a is the discharge pressure, while point b is the evaporation pressure. The pressure at point a is higher than that at point b. The high-temperature refrigerant gas generated by the compressor 500 enters the fluid storage device 100 through the gas pipe 104, discharges the gas in the fluid storage device 100, and presses the valve core 103 against the second sealing part 1015. At this time, the fluid storage device 100 contains refrigerant gas. It can be understood that point a is the connection point between the gas pipe 104 of the fluid storage device 100 and the inlet pipe 201 of the indoor heat exchanger 200; point b is the connection point between the liquid pipe 105 of the fluid storage device 100 and the flow path between the outdoor heat exchanger 300 and the electronic expansion valve 400.

[0084] The first and third ends of the four-way valve 600 are connected, and the second and fourth ends are connected. The high-temperature refrigerant gas generated by the compressor 500 flows into the fluid storage device 100 through the first and third ends of the four-way valve 600, and the other part flows into the indoor heat exchanger 200 to condense and release heat. It then flows through the electronic expansion valve 400 for throttling, and then evaporates and absorbs heat through the outdoor heat exchanger 300. Finally, it flows back to the compressor 500 through the fourth and second ends of the four-way valve 600.

[0085] like Figure 5As shown, the winter defrosting mode: when the winter is switched from the heating mode to the defrosting mode, the liquid pipe 105 is in the open state, and the point a is the evaporation pressure, and the point b is the condensation pressure, the pressure of the point b is higher than that of the point a, due to the high liquid resistance of the throttling state of the electronic expansion valve 400, the low-temperature refrigerant liquid remaining in the outdoor heat exchanger 300 itself selects the liquid pipe 105 flow path with smaller liquid resistance to quickly enter the fluid storage device 100, extruding the refrigerant gas stored inside to make it backflow to the compressor 500, and the valve core 103 moves upward, when the fluid storage device 100 is in the full-liquid state, the valve core 103 is pressed against the first sealing portion 1014 to block the gas pipe 104; and in the process, since the gas pipe 104 is connected to the gas inlet pipe 201 of the indoor heat exchanger 200, and at this time the gas inlet pipe 201 is the suction side of the compressor 500, under the action of the suction force of the compressor 500 and the refrigerant liquid thrust of the outdoor heat exchanger 300, the refrigerant gas in the fluid storage device 100 can be quickly discharged, so that the refrigerant liquid remaining in the outdoor heat exchanger 300 can quickly enter the fluid storage device 100, and effective sealing is realized.

[0086] Wherein, the first end and the fourth end of the four-way valve 600 are communicated, and the second end and the third end are communicated, the high-temperature refrigerant gas generated by the compressor 500 flows into the outdoor heat exchanger 300 through the first end and the fourth end of the four-way valve 600 to condense and heat to defrost, at this time, the low-temperature refrigerant liquid remaining in the outdoor heat exchanger 300 has been emptied into the fluid storage device 100, the high-temperature refrigerant gas generated by the compressor 500 can be in large-area contact with the coil of the outdoor heat exchanger 300 to quickly defrost; the liquid refrigerant generated by condensing and heating can flow into the fluid storage device 100 first until the full-liquid state, and then flow through the electronic expansion valve 400 to throttle, and then evaporate and heat in the indoor heat exchanger 200, and then backflow into the compressor 500 through the third end and the second end of the four-way valve 600.

[0087] Therefore, the embodiment of the present application applies the fluid storage device 100 to the air conditioner, and at least has the following technical effects:

[0088] (1) The low-temperature refrigerant liquid level in the outdoor heat exchanger 300 can be quickly lowered, and more coil inner walls can be quickly contacted with the high-temperature exhaust gas to realize quick defrosting;

[0089] (2) The low-temperature refrigerant liquid in the outdoor heat exchanger 300 is quickly discharged, and no longer absorbs the heat of the high-temperature refrigerant gas entering the outdoor heat exchanger 300, so that the heat of the high-temperature refrigerant gas can be more used for defrosting, thereby improving the defrosting effect;

[0090] (3) Since the fluid storage device 100 contains a portion of the refrigerant liquid, the refrigerant entering the indoor heat exchanger 200 through the electronic expansion valve 400 is reduced, the refrigerant liquid level in the indoor heat exchanger 200 is lowered, the suction gas overheating is caused, the exhaust gas overheating is caused, the higher-temperature compressor exhaust gas enters the outdoor heat exchanger 300, the outdoor heat exchanger 300 is warmed up faster, the contact surface of the outdoor heat exchanger 300 and the frost layer is rapidly heated, the frost layer loses the adhesion, and is blown away from the surface of the outdoor heat exchanger 300 under the action of the strong wind force.

[0091] (4) During the entire defrosting switching process, most of the refrigerant liquid is stored in the fluid storage device 100 and does not participate in the circulation, and the heat exchange does not occur, so that the invalid heat loss caused by the sensible heat change of the liquid refrigerant is reduced.

[0092] When the defrosting is completed, the four-way valve 600 is switched to the heating mode again, at this time, the pressure at point a is higher than that at point b again, part of the high-temperature refrigerant gas generated by the compressor 500 enters the fluid storage device 100 through the gas pipe 104, the refrigerant liquid in the fluid storage device 100 is discharged to the outdoor heat exchanger 300, and the valve core 103 is lowered, when the valve core 103 is lowered to the second sealing portion 1015, the refrigerant liquid in the fluid storage device 100 is emptied, at this time, the refrigerant gas is stored, the refrigerant gas presses the valve core 103 on the second sealing portion 1015 to form a seal, and the normal heating mode is restored.

[0093] Therefore, the air conditioner provided by the embodiment of the present application can rapidly empty the refrigerant liquid remaining in the outdoor heat exchanger 300 after the defrosting mode is started, the high-temperature refrigerant gas can contact the inner wall of the coil of the outdoor heat exchanger 300 in a larger area more quickly, the large-area contact between the low-temperature refrigerant liquid and the high-temperature refrigerant gas is avoided, the time for the inner wall of the coil of the outdoor heat exchanger 300 to be occupied by the liquid is shortened, and thus the defrosting time is shortened; and the exhaust gas temperature of the compressor can be increased, the high-temperature refrigerant gas with a higher temperature enters the outdoor heat exchanger 300, and the rapid defrosting is realized. Therefore, the present application can realize the effects that the liquid in the outdoor heat exchanger 300 is rapidly emptied during the defrosting, and the liquid level is rapidly restored after the defrosting is completed.

[0094] In addition, the fluid storage device 100 of the present application does not affect the normal refrigeration operation in summer, and only plays a role in the defrosting mode in winter, so that the liquid refrigerant in the coil of the outdoor heat exchanger 300 can be rapidly emptied after the defrosting mode is switched, and the problems such as the impact caused by the large flow inertia and the liquid suction of the compressor can be avoided.

[0095] According to one embodiment of the present application, the liquid pipe 105 is provided with a control valve for controlling the liquid pipe 105 to be closed in the cooling mode and to be opened in the heating mode or the defrosting mode. That is, in summer, the fluid storage device 100 does not work, and in winter, the fluid storage device 100 works.

[0096] According to one embodiment of the present application, referring to Figure 2 the control valve is a thermal cut-off valve 700, the thermal cut-off valve 700 is connected with a ring temperature sensing bulb 900 through a capillary tube 800, the ring temperature sensing bulb 900 can be generally filled with refrigerant, and the ring temperature sensing bulb 900 is used for controlling the on-off of the thermal cut-off valve 700.

[0097] Specifically, in summer cooling operation, the outdoor environment temperature is high, the refrigerant in the ring temperature sensing bulb 900 evaporates, the pressure is high, the thermal cut-off valve 700 is in the closed state, at this time, the fluid storage device 100 is in the open circuit state and does not work; in winter heating operation, the outdoor environment temperature is low, the pressure in the ring temperature sensing bulb 900 is relatively low, the thermal cut-off valve 700 is opened, and the fluid storage device 100 works.

[0098] Of course, the control valve of the present application can also be an electromagnetic valve and the like, which is controlled by setting a program to be closed in summer and opened in winter.

[0099] Therefore, the embodiment of the present application can realize the automatic on-off control of the fluid storage device 100, thereby improving the user experience.

[0100] According to one embodiment of the present application, the indoor heat exchanger 200 is a double-pipe heat exchanger, and the outdoor heat exchanger 300 is a fin heat exchanger.

[0101] Of course, the indoor heat exchanger 200 and the outdoor heat exchanger 300 can also be other types of heat exchangers, which are not particularly limited in the present application.

[0102] Next, the defrosting control method of the air conditioner provided by the present application is described, referring to Figure 6 the present application further provides a defrosting control method of the air conditioner of the above-mentioned embodiment, mainly comprising the following steps:

[0103] S100, acquiring the operation mode of the air conditioner.

[0104] S200, determining that the air conditioner operates to the defrosting mode, and controlling the liquid pipe 105 to be opened.

[0105] According to one embodiment of the present application, the defrosting control method of the air conditioner further comprises the step of:

[0106] S300, determining that the air conditioner operates to the cooling mode, and controlling the liquid pipe 105 to be closed.

[0107] S400, determining that the air conditioner is running to the heating mode, and controlling the liquid pipe 105 to open.

[0108] The specific process of the control method can refer to the operation mode of the air conditioner described above, and will not be repeated here.

[0109] The defrosting control method of the air conditioner provided by the embodiment of the present application can quickly empty the refrigerant liquid in the outdoor heat exchanger after the air conditioner is switched to the defrosting mode, so that the high-temperature refrigerant gas generated by the compressor can contact the inner wall of the outdoor heat exchanger coil more quickly and in a larger area, the exhaust temperature of the compressor can be improved, the high-temperature refrigerant gas with higher temperature can enter the outdoor heat exchanger, the defrosting time can be effectively shortened, and the purpose of rapid defrosting is achieved.

[0110] 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 foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fluid storage device, characterized by, include: The housing has a storage cavity and an air port and a liquid port communicating with the storage cavity; A guide slide is disposed within and communicates with the storage cavity, and both ends of the guide slide are communicated with the air port and the liquid port; The valve core is movably disposed within the guide slide and is adapted to switch between a first position and a second position. In the first position, the storage cavity stores gas, and the valve core closes the liquid outlet; In the second position, the storage cavity stores liquid, and the valve core closes the air port.

2. The fluid storage device of claim 1, wherein, The valve core is an elastic valve core.

3. The fluid storage device of claim 2, wherein, The valve core is a float ball, and the upper and lower ends of the housing are respectively provided with a hemispherical first sealing part and a second sealing part. The first sealing part is provided with the air port, and the second sealing part is provided with the liquid port. At the first position, the float is sealed to the second sealing part; In the second position, the float is sealed to the first sealing part.

4. The fluid storage device of claim 1, wherein, The guide slide is formed by at least three guide rods.

5. The fluid storage device of claim 1, wherein, The air inlet is connected to an air pipe, and the liquid inlet is connected to a liquid pipe.

6. The fluid storage device of any one of claims 1-5, wherein, The shell is a pressure-resistant container.

7. An air conditioner characterized by comprising: include: An indoor heat exchanger, an outdoor heat exchanger, and a fluid storage device according to any one of claims 1-6, wherein an electronic expansion valve is provided between the indoor heat exchanger and the outdoor heat exchanger, the air port of the fluid storage device is connected to the air inlet pipe of the indoor heat exchanger, and the liquid port of the fluid storage device is connected between the outdoor heat exchanger and the electronic expansion valve via a liquid pipe, and the liquid pipe is openable and closable. The flow path diameter of the liquid pipe is larger than that of the electronic expansion valve.

8. The air conditioner of claim 7, wherein Also includes: compressor; A four-way valve, wherein the first end of the four-way valve is connected to the exhaust port of the compressor, the second end of the four-way valve is connected to the intake port of the compressor, the third end of the four-way valve is connected to the intake pipe of the indoor heat exchanger, and the fourth end of the four-way valve is connected to the outdoor heat exchanger.

9. The air conditioner of claim 7, wherein The liquid pipe is equipped with a control valve, which is used to control the liquid pipe to close in cooling mode and to control the liquid pipe to open in heating mode or defrost mode.

10. The air conditioner of claim 9, wherein The control valve is a thermal shut-off valve, which is connected to an ambient temperature sensor. The ambient temperature sensor is used to control the opening and closing of the thermal shut-off valve.

11. A defrosting control method of an air conditioner according to any one of claims 7 to 10, characterized by, include: Obtain the operating mode of the air conditioner; Once the air conditioner is confirmed to be in defrost mode, the liquid pipe is opened.

12. The defrost control method of claim 11, wherein, Also includes: Once the air conditioner is confirmed to be operating in cooling mode, the liquid pipe is shut off. Once the air conditioner is confirmed to be in heating mode, the liquid pipe is opened.

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