Fluid storage device, air conditioner and defrosting control method

Abstract

The invention 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 sliding way and a valve element; the shell is provided with a storage cavity as well as an air port and a liquid port which are communicated with the storage cavity; the guide slide way is arranged in the storage cavity and communicated with the storage cavity, and the two ends of the guide slide way are communicated with the gas port and the liquid port; the valve element is movably arranged in the guide slide way and is suitable for being switched between a first position and a second position, and at the first position, the storage cavity stores gas, and the valve element seals the liquid opening; and at the second position, the storage cavity stores liquid, and the valve element seals the air port. According to requirements, gas or liquid can be stored, the function that one object has multiple purposes is achieved, the full-gas and full-liquid self-locking effect can be achieved, and the beneficial effects of being simple in structure, high in reliability and the like are achieved.

Description

Technical Field

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

[0002] In the related art, when storing fluids such as gas and liquid, different dedicated storage devices are generally used for storage. The fluid storage function of the storage device is single, and the storage device cannot be effectively filled, the sealing effect is poor, and the reliability is low. Summary of the invention

[0003] The present invention provides a fluid storage device, an air conditioner and a defrost control method, which are used to solve the defect of the single fluid storage function of the storage device in the related art. Gas or liquid can be stored according to needs to achieve the function of one thing with multiple uses, and the effect of self-locking when full of gas or full of liquid can be achieved. The method has the characteristics of simple structure and high reliability.

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

[0005] A shell body, provided with a storage cavity and a gas port and a liquid port communicated with the storage cavity;

[0006] A guide slideway is disposed in the storage cavity and communicated with the storage cavity, and two ends of the guide slideway are communicated with the gas port and the liquid port;

[0007] The valve core is movably disposed in the guide slideway and is suitable for switching between a first position and a second position.

[0008] Wherein, 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 a fluid storage device provided by the present invention, the valve core is an elastic valve core.

[0011] According to a fluid storage device provided by the present invention, the valve core is a floating ball, and the upper and lower ends of the shell are respectively provided with a hemispherical first sealing part and a second sealing part, 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 float is sealed and connected to the second sealing portion;

[0013] In the second position, the float is sealingly connected to the first sealing portion.

[0014] According to a fluid storage device provided by the present invention, the guide slideway is formed by at least three guide rods.

[0015] According to a fluid storage device provided by the present invention, the gas port is connected to an air pipe, and the liquid port is connected to a liquid pipe.

[0016] According to a fluid storage device provided by the present invention, the shell is a pressure-resistant container.

[0017] The present invention also provides an air conditioner, comprising: an indoor heat exchanger, an outdoor heat exchanger and the above-mentioned fluid storage device, wherein an electronic expansion valve is provided between the indoor heat exchanger and the outdoor heat exchanger, an air port of the fluid storage device is connected to an air inlet pipe of the indoor heat exchanger, a 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 can be opened and closed;

[0018] Wherein, the flow path diameter of the liquid pipe is larger than the flow path diameter of the electronic expansion valve.

[0019] An air conditioner according to the present invention further comprises:

[0020] compressor;

[0021] A four-way valve, wherein a first end of the four-way valve is connected to the exhaust port of the compressor, a second end of the four-way valve is connected to the intake port of the compressor, a third end of the four-way valve is connected to the air inlet pipe of the indoor heat exchanger, and a fourth end of the four-way valve is connected to the outdoor heat exchanger.

[0022] According to an air conditioner provided by the present invention, the liquid pipe is provided with a control valve 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] According to an air conditioner provided by the present invention, the control valve is a thermal stop valve, and the thermal stop valve is connected to an ambient temperature sensing bag, and the ambient temperature sensing bag is used to control the on and off of the thermal stop valve.

[0024] The present invention also provides a defrosting control method for the above air conditioner, comprising:

[0025] Get the operating mode of the air conditioner;

[0026] It is determined that the air conditioner is operated in a defrost mode, and the liquid pipe is controlled to be opened.

[0027] A defrost control method for an air conditioner according to the present invention further includes:

[0028] Determining that the air conditioner operates in a cooling mode, and controlling the liquid pipe to close;

[0029] Determine that the air conditioner operates in a heating mode, and control the liquid pipe to open.

[0030] The fluid storage device, air conditioner and defrost control method provided by the present invention are that the fluid storage device can store gas or liquid according to the pressure difference between the gas port and the liquid port, thereby realizing the function of one object with multiple uses, and can achieve the self-locking effect when full of gas and full of liquid, and has the characteristics of simple structure and high reliability. 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 is switched to the defrost 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 over a large area, and the exhaust temperature of the compressor can be increased, so that the high-temperature refrigerant gas with a higher temperature can enter the outdoor heat exchanger, effectively shortening the defrost time, thereby achieving the purpose of rapid defrosting. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

[0034] Figure 3 It is a schematic diagram of the cooling mode principle of the air conditioner provided by the present invention;

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

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

[0037] Figure 6 It is a flow chart of the defrosting control method of the air conditioner provided by the present invention.

[0038] Reference numerals:

[0039] 100: fluid storage device; 101: housing; 1011: storage cavity; 1012: air port;

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

[0041] 102: guide slide; 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 stop valve; 800: Capillary tube; 900: Ambient temperature sensing package. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0049] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean 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 being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0051] Combine the following Figure 1-Figure 6 The fluid storage device, air conditioner and defrost control method of the present invention are described.

[0052] According to an embodiment of the first aspect of the present invention, referring to Figure 1-Figure 5 As shown, the fluid storage device 100 provided by the present invention mainly includes: a housing 101 , a guide slide 102 and a valve core 103 .

[0053] Among them, a storage cavity 1011 is provided inside the shell 101, and a gas port 1012 and a liquid port 1013 are provided at both ends of the shell 101. The gas port 1012 and the liquid port 1013 are respectively connected to the storage cavity 1011. Gas can be fed into the storage cavity 1011 through the gas port 1012, or the gas in the storage cavity 1011 can be discharged through the gas port 1012; liquid can be fed into the storage cavity 1011 through the liquid port 1013, or the liquid in the storage cavity 1011 can be discharged through the liquid port 1013.

[0054] The guide slide 102 is arranged in the storage cavity 1011, and the guide slide 102 is connected with the storage cavity 1011, and the two ends of the guide slide 102 are respectively connected with the gas port 1012 and the liquid port 1013; the valve core 103 is movably arranged in the guide slide 102, and the valve core 103 is suitable for switching between a first position and a 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. The guide 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, squeezing out the gas in the storage cavity 1011, and at the same time, the valve core 103 moves toward the liquid port 1013 due to the squeezing of the gas. When the valve core 103 moves to be in close contact with the liquid port 1013, the gas storage 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, squeezing out the gas in the storage cavity 1011, and at the same time, the valve core 103 is squeezed by the liquid and moves toward the gas port 1012. When the valve core 103 moves to be in close 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 in the embodiment of the present invention can store gas or liquid according to the pressure difference between the gas port 1012 and the liquid port 1013, thereby realizing the function of one object for multiple uses, and can achieve the effect of self-locking when full of gas or full of liquid, and has the characteristics of simple structure and high reliability.

[0058] According to one embodiment of the present invention, the valve core 103 is an elastic valve core, that is, the valve core 103 can be deformed under force. If designed in this way, the valve core 103 can tightly close the air port 1012 or the liquid port 1013 under the action of air pressure or hydraulic pressure, thereby improving the sealing effect.

[0059] According to one embodiment of the present invention, referring to Figure 1As shown, the valve core 103 is a float, and the upper and lower ends of the shell 101 are respectively provided with a hemispherical first sealing portion 1014 and a second sealing portion 1015, that is, the upper end of the shell 101 is provided with a hemispherical first sealing portion 1014, and the lower end of the shell 101 is provided with a hemispherical second sealing portion 1015, and the shapes of the first sealing portion 1014 and the second sealing portion 1015 are adapted to the shape of the float for easy sealing; the first sealing portion 1014 is provided with an air port 1012, and the second sealing portion 1015 is provided with a liquid port 1013; when the float moves to the first position, the float is sealed and connected to the second sealing portion 1015 at the lower end; when the float moves to the second position, the float is sealed and connected to the first sealing portion 1014 at the upper end.

[0060] In the embodiment of the present invention, the valve core 103 is configured as a flexible sphere, and a sealing portion that matches the shape of the valve core 103 is provided, which can effectively improve the sealing self-locking effect.

[0061] According to one embodiment of the present invention, the float of the present invention may be a hollow structure.

[0062] Furthermore, the specific material of the float of the present invention is not particularly limited. For example, it can be made of plastic, metal, etc., and can be designed according to actual needs.

[0063] It is understandable that the valve core 103 can also be set to a square shape or other shapes that are easy to seal, and the shape of the sealing part is also set to a square.

[0064] According to one embodiment of the present invention, the guide slide 102 is surrounded by at least three guide rods 1021. Such a design can guide the movement of the valve core 103 on the one hand, and on the other hand, the guide slide 102 can be connected with the storage cavity 1011, so that the gas or liquid entering can squeeze out the gas inside the storage cavity 1011 while pushing the valve core 103 to move for sealing and self-locking.

[0065] In a specific example, four guide rods 1021 are provided, and the guide slideway 102 is formed by four evenly vertically distributed guide rods 1021 , and the valve core 103 can only move up and down in the guide slideway 102 .

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

[0067] According to one embodiment of the present invention, the housing 101 is a pressure-resistant container to improve the safety of the entire device.

[0068] The fluid storage device 100 provided by the present invention is described below with reference to a specific example.

[0069] like Figure 1 As shown, the fluid storage device 100 generally includes: a hollow pressure-resistant container, four metal guide rods 1021 and a hollow metal float. A hemispherical first sealing portion 1014 is provided at the upper end of the pressure-resistant container, and the first sealing portion 1014 is connected to an air pipe 104 leading to the outside. A hemispherical second sealing portion 1015 is provided at the lower end of the pressure-resistant container, and the second sealing portion 1015 is connected to a liquid pipe 105 leading to the outside. The first sealing portion 1014 and the second sealing portion 1015 can be combined with the metal float to form a seal; four guide rods 1021 are surrounded in the pressure-resistant container to form a guide slide 102, and the metal float is limited 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 gas pipe 104 is greater than the pressure of the liquid pipe 105, the gas enters the pressure container from the gas pipe 104, and is squeezed by the upper gas, the metal float falls into the second sealing part 1015 at the bottom, and the metal float forms a seal with the second sealing part 1015. At this time, the pressure container is full of gas; when the pressure of the liquid pipe 105 is greater than the pressure of the gas pipe 104, the liquid enters the pressure container from the liquid pipe 105, and the metal float rises under the action of the buoyancy of the liquid. After reaching the first sealing part 1014, the metal float forms a seal with the first sealing part 1014 under the action of the liquid squeezing. At this time, the pressure container is full of liquid.

[0071] In the related art, when the air conditioner is running in heating mode in winter, when the outdoor environment humidity is high, the outdoor heat exchanger is prone to frost. When frost is detected, the air conditioner will switch the flow direction of the four-way reversing valve and switch 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 defrosting effect.

[0072] This solution is a traditional defrosting solution for air conditioners, and its technical problems include at least:

[0073] (1) After the air conditioner switches from heating mode to 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. Due to the small diameter of the electronic expansion valve, the transfer speed of the refrigerant liquid between the outdoor heat exchanger and the indoor heat exchanger is slow, that is, the refrigerant liquid level in the outdoor heat exchanger drops slowly, resulting in the refrigerant liquid in the coil of the outdoor heat exchanger being unable to be emptied for a long time, occupying the heat exchange area of ​​the inner wall of the coil, so that the high-temperature refrigerant gas generated by the compressor cannot contact the inside of the coil in time, affecting the defrosting speed. It can only wait for defrosting from top to bottom as the refrigerant level drops, and the defrosting speed is slow.

[0074] (2) When designing a fin-type outdoor heat exchanger, the aluminum foil fins are arranged vertically to facilitate drainage, and the coils arranged perpendicular to the aluminum foil fins are arranged horizontally. This causes the refrigerant level in the coil to drop in the axial horizontal direction of the coil, resulting in the phenomenon that the upper half of the coil is gas and the lower half is liquid. This increases the contact area between the liquid and the gas. When defrosting, after the high-temperature refrigerant gas enters the outdoor heat exchanger coil, part of the heat will be absorbed by the low-temperature refrigerant liquid, resulting in a reduction in the heat used for effective defrosting, which leads to poor defrosting effect.

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

[0076] (4) When the defrost is started, the low-temperature refrigerant liquid in the outdoor heat exchanger enters the indoor heat exchanger and becomes a high-temperature liquid, absorbing a certain amount of sensible heat. After the defrost is completed, this part of the refrigerant liquid needs to return to the outdoor heat exchanger to become a low-temperature state. The absorbed sensible heat needs to be flashed out again and returned to the indoor heat exchanger through the work of the compressor. This part of the heat consumption is useless consumption, resulting in a certain amount of energy waste and affecting the energy efficiency of the whole machine.

[0077] To this end, the present invention skillfully applies and combines the fluid storage device 100 of the above embodiment into an air conditioner, which can solve at least one of the above technical problems in the related art.

[0078] According to an embodiment of the second aspect of the present invention, referring to Figure 2-Figure 5 As shown, the present invention also provides an air conditioner, which mainly includes: 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, an air port 1012 of the fluid storage device 100 is connected to the air inlet pipe 201 of the indoor heat exchanger 200 via an air pipe 104, a liquid port 1013 of the fluid storage device 100 is connected between the outdoor heat exchanger 300 and the electronic expansion valve 400 via a liquid pipe 105, and the liquid pipe 105 can be opened and closed; 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 invention, the air conditioner of the present invention further includes: a compressor 500 and a four-way valve 600, wherein a first end of the four-way valve 600 is connected to an exhaust port of the compressor 500, a second end of the four-way valve 600 is connected to an air intake port of the compressor 500, a third end of the four-way valve 600 is connected to an air inlet pipe 201 of an indoor heat exchanger 200, and a fourth end of the four-way valve 600 is connected to an outdoor heat exchanger 300. By switching the four-way valve 600, the switching of the operating mode of the air conditioner can be achieved.

[0080] Combine the following Figure 3-Figure 5 The operating modes of the air conditioner provided by the present invention are described as follows: summer cooling mode, winter heating mode and winter defrosting mode. The flow direction of the fluid medium is shown in the direction indicated by the arrow 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 a closed state, and the fluid storage device 100 is in an open circuit state and does not function.

[0082] Among them, the first end of the four-way valve 600 is connected to the fourth end, and the second end is connected to the third end. 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 release heat, flows through the electronic expansion valve 400 to throttle, then evaporates and absorbs heat through the indoor heat exchanger 200, and then flows back to the compressor 500 through the third end and the second end of the four-way valve 600.

[0083] like Figure 4 As shown, winter heating mode: during normal winter heating operation, the liquid pipe 105 is in an open state, and point a is the exhaust pressure, point b is the evaporation pressure, the pressure at point a is higher than the pressure at point b, and 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 portion 1015. At this time, the fluid storage device 100 is filled with 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 air 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] Among them, the first end of the four-way valve 600 is connected to the third end, and the second end is connected to the fourth end. A part of the high-temperature refrigerant gas generated by the compressor 500 flows into the fluid storage device 100 through the first end and the third end of the four-way valve 600, and the other part flows into the indoor heat exchanger 200 to condense and release heat, flows through the electronic expansion valve 400 to throttle, then evaporates and absorbs heat through the outdoor heat exchanger 300, and then flows back to the compressor 500 through the fourth end and the second end of the four-way valve 600.

[0085] like Figure 5As shown, winter defrost mode: when the heating mode is switched to the defrost mode in winter, the liquid pipe 105 is in an open state, and point a is the evaporation pressure, and point b is the condensation pressure. The pressure at point b is higher than the pressure at point a. Since the liquid resistance of the electronic expansion valve 400 in the throttling state is relatively high, the low-temperature refrigerant liquid retained in the outdoor heat exchanger 300 automatically selects the liquid pipe 105 flow path with a smaller liquid resistance to quickly enter the fluid storage device 100, squeezes out the refrigerant gas stored inside, and makes it flow back into the compressor 500, and moves the valve core 103 upward. When the fluid storage device 1 00 is in a full liquid state, the valve core 103 is pressed against the first sealing portion 1014 to block the air pipe 104; and in this process, since the air pipe 104 is connected to the air inlet pipe 201 of the indoor heat exchanger 200, and the air inlet pipe 201 is the suction side of the compressor 500 at this time, under the action of the suction force of the compressor 500 and the thrust of the refrigerant liquid of the outdoor heat exchanger 300, the refrigerant gas in the fluid storage device 100 can be quickly discharged, so that the refrigerant liquid retained in the outdoor heat exchanger 300 can quickly enter the fluid storage device 100 and achieve effective sealing.

[0086] Among them, the first end of the four-way valve 600 is connected to the fourth end, and the second end is connected to the third end. 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 for condensation, heat release and defrosting. At this time, the low-temperature refrigerant liquid retained in the outdoor heat exchanger 300 has been emptied into the fluid storage device 100, and the high-temperature refrigerant gas generated by the compressor 500 can contact the outdoor heat exchanger 300 coil over a large area for rapid defrosting; the liquid refrigerant generated by condensation and heat release can preferentially flow into the fluid storage device 100 until it is full of liquid, and then flow through the electronic expansion valve 400 for throttling, and then evaporate and absorb heat through the indoor heat exchanger 200, and then flow back to the compressor 500 through the third end and the second end of the four-way valve 600.

[0087] Therefore, the embodiment of the present invention cleverly applies the fluid storage device 100 to the air conditioner, which at least includes the following technical effects:

[0088] (1) The liquid level of the low-temperature refrigerant in the outdoor heat exchanger 300 can be rapidly reduced, so that more inner walls of the coils can be quickly in contact with the high-temperature exhaust gas, thereby achieving rapid 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. The heat of the high-temperature refrigerant gas can be used more 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 will be reduced, causing the refrigerant liquid level in the indoor heat exchanger 200 to drop, resulting in overheating of the suction air, and thus overheating of the exhaust air. The compressor exhaust air with a higher temperature will enter the outdoor heat exchanger 300, causing the outdoor heat exchanger 300 to heat up faster, quickly heating the contact surface between the outdoor heat exchanger 300 and the frost layer, causing the frost layer to lose its adhesion and be blown away from the surface of the outdoor heat exchanger 300 under the action of strong wind force.

[0091] (4) During the entire defrost switching process, most of the refrigerant liquid is stored in the fluid storage device 100, does not participate in the circulation, and no heat exchange occurs, thereby reducing the ineffective heat loss caused by the sensible heat change of the liquid refrigerant.

[0092] When defrosting is completed, the four-way valve 600 switches 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, so that the refrigerant liquid in the fluid storage device 100 is discharged to the outdoor heat exchanger 300, and the valve core 103 moves downward. When it moves down to the second sealing part 1015, the refrigerant liquid in the fluid storage device 100 is emptied. At this time, the refrigerant gas is stored, and the refrigerant gas presses the valve core 103 against the second sealing part 1015 to form a seal, and then returns to the normal heating mode.

[0093] Therefore, after the defrost mode is started, the air conditioner provided by the embodiment of the present invention can quickly empty the refrigerant liquid retained in the outdoor heat exchanger 300, so that the high-temperature refrigerant gas can contact the inner wall of the coil of the outdoor heat exchanger 300 more quickly and in a large area, avoiding large-area contact between the low-temperature refrigerant liquid and the high-temperature refrigerant gas, shortening the time that the inner wall of the coil of the outdoor heat exchanger 300 is occupied by the liquid, thereby shortening the defrost time; and can increase the exhaust temperature of the compressor, so that the high-temperature refrigerant gas with a higher temperature enters the outdoor heat exchanger 300, and realizes rapid defrosting. Therefore, the present invention can achieve the effect of quickly emptying the liquid from the outdoor heat exchanger 300 during defrosting, and quickly restoring the liquid level after the defrosting is completed.

[0094] Furthermore, the fluid storage device 100 of the present invention will not affect the normal refrigeration operation in summer, and will only function in the defrost mode in winter. After switching to the defrost mode, the liquid refrigerant in the coil of the outdoor heat exchanger 300 can be quickly discharged, and at the same time, the impact caused by the inertia of large flow and the problem of liquid suction by the compressor can be avoided.

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

[0096] According to one embodiment of the present invention, referring to Figure 2 As shown, the control valve is a thermal stop valve 700 , which is connected to an ambient temperature sensing package 900 via a capillary tube 800 . The ambient temperature sensing package 900 can generally be filled with refrigerant, and the ambient temperature sensing package 900 is used to control the on and off of the thermal stop valve 700 .

[0097] Specifically, during the cooling operation in summer, the outdoor ambient temperature is high, the refrigerant in the ambient temperature sensing bag 900 evaporates, and the pressure is high, so that the thermal stop valve 700 is in a closed state. At this time, the fluid storage device 100 is in an open circuit state and does not function; during the heating operation in winter, the outdoor ambient temperature is low, the pressure in the ambient temperature sensing bag 900 is relatively low, the thermal stop valve 700 is opened, and the fluid storage device 100 functions.

[0098] Of course, the control valve of the present invention can also be a solenoid valve, etc., which can be controlled by setting a program to be closed in summer and opened in winter.

[0099] Therefore, the embodiment of the present invention can realize automatic opening and closing control of the fluid storage device 100, thereby improving the user experience.

[0100] According to one embodiment of the present invention, the indoor heat exchanger 200 is a shell and tube 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 may also be other types of heat exchangers, and the present invention does not make any special limitation thereto.

[0102] The defrosting control method of the air conditioner provided by the present invention is described below. Figure 6 As shown, the present invention also provides a defrosting control method for the air conditioner of the above embodiment, which mainly includes the following steps:

[0103] S100: Acquire the operating mode of the air conditioner.

[0104] S200, determine that the air conditioner is running in the defrost mode, and control the liquid pipe 105 to open.

[0105] According to one embodiment of the present invention, the defrost control method of the air conditioner of the present invention further comprises the steps of:

[0106] S300, determining that the air conditioner is running in cooling mode, and controlling the liquid pipe 105 to be closed;

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

[0108] The specific process of the control method of the present invention can be found in the operating mode of the aforementioned air conditioner, and will not be described in detail here.

[0109] The defrost control method for an air conditioner provided in an embodiment of the present invention can quickly empty the refrigerant liquid in the outdoor heat exchanger after the air conditioner is switched to the defrost 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 over a large area, and can increase the exhaust temperature of the compressor, so that the high-temperature refrigerant gas with a higher temperature can enter the outdoor heat exchanger, effectively shortening the defrost time, thereby achieving the purpose of rapid defrosting.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fluid storage device, characterized in that: include: A shell body, provided with a storage cavity and a gas port and a liquid port communicated with the storage cavity; A guide slideway is disposed in the storage cavity and communicated with the storage cavity, and two ends of the guide slideway are communicated with the gas port and the liquid port; The valve core is movably disposed in the guide slideway and is suitable for switching between a first position and a second position. Wherein, 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.

2. The fluid storage device according to claim 1, characterized in that: The valve core is an elastic valve core.

3. The fluid storage device according to claim 2, characterized in that: The valve core is a floating ball, and the upper and lower ends of the shell are respectively provided with a hemispherical first sealing part and a second sealing part, the first sealing part is provided with the gas port, and the second sealing part is provided with the liquid port; In the first position, the float is sealed and connected to the second sealing portion; In the second position, the float is sealingly connected to the first sealing portion.

4. The fluid storage device according to claim 1, characterized in that: The guide slideway is formed by at least three guide rods.

5. The fluid storage device according to claim 1, characterized in that: The gas port is connected with a gas pipe, and the liquid port is connected with a liquid pipe.

6. The fluid storage device according to any one of claims 1 to 5, characterized in that: The shell is a pressure-resistant container.

7. An air conditioner, characterized in that: include: An indoor heat exchanger, an outdoor heat exchanger and a fluid storage device according to any one of claims 1 to 6, wherein an electronic expansion valve is provided between the indoor heat exchanger and the outdoor heat exchanger, the gas port of the fluid storage device is connected to the air inlet pipe of the indoor heat exchanger, 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 can be opened and closed; Wherein, the flow path diameter of the liquid pipe is larger than the flow path diameter of the electronic expansion valve.

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

9. The air conditioner according to claim 7, characterized in that: The liquid pipe is provided with a control valve, which is used to control the liquid pipe to be closed in the cooling mode, and to control the liquid pipe to be opened in the heating mode or the defrosting mode.

10. The air conditioner according to claim 9, characterized in that: The control valve is a thermal stop valve, and the thermal stop valve is connected to an ambient temperature sensing package, and the ambient temperature sensing package is used to control the on and off of the thermal stop valve.

11. A defrosting control method for an air conditioner according to any one of claims 7 to 10, characterized in that: include: Get the operating mode of the air conditioner; It is determined that the air conditioner is operated in a defrost mode, and the liquid pipe is controlled to be opened.

12. The defrosting control method of an air conditioner according to claim 11, characterized in that: Also includes: Determining that the air conditioner operates in a cooling mode, and controlling the liquid pipe to close; Determine that the air conditioner operates in a heating mode, and control the liquid pipe to open.

Images