Liquid accumulator and air conditioning unit

Abstract

The invention relates to the technical field of fluid, and provides a liquid storage device and an air conditioning unit, the liquid storage device comprises a tank body, a first partition plate, a second partition plate and a valve element assembly, the first partition plate and the second partition plate are arranged in the tank body at intervals in the height direction of the tank body to sequentially divide an air outlet cavity, a liquid storage cavity and a liquid cavity, and the first partition plate is provided with a first through hole; the second partition plate is provided with a second through hole, the air cavity is provided with an air opening, and the liquid cavity is provided with a first liquid opening and a second liquid opening. The valve element assembly is movably arranged in the liquid storage cavity and is suitable for being switched between a first position and a second position, at the first position, the valve element assembly seals the first through hole, and the liquid storage cavity is in a full liquid state; and at the second position, the valve element assembly seals the second through hole, and the liquid storage cavity is in a full-gas state. Active liquid storage and active liquid drainage can be achieved, the full-liquid and full-gas self-locking effect can be achieved, and the device has the advantages of being simple in structure, stable, high in reliability and the like.

Description

Technical Field

[0001] The present invention relates to the field of fluid technology, and in particular to a liquid storage device and an air conditioning unit. Background Art

[0002] At present, most of the existing liquid storage devices are passive liquid storage tanks, that is, a fixed container without a moving part, which cannot realize active liquid storage and active liquid discharge, and the liquid storage is often unstable, resulting in the inability to effectively fill the liquid storage tank and low reliability. Summary of the invention

[0003] The present invention provides a liquid storage device and an air conditioning unit, which can realize active liquid storage and active liquid discharge, and can realize the self-locking effect when full of liquid and full of gas, and has the characteristics of simple structure, high stability and reliability, etc.

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

[0005] Tank;

[0006] A first partition plate and a second partition plate are arranged in the tank body at intervals along the height direction of the tank body to sequentially separate the air cavity, the liquid storage cavity and the liquid cavity, and the first partition plate is provided with a first through hole, the second partition plate is provided with a second through hole, the air cavity is provided with an air port, and the liquid cavity is provided with a first liquid port and a second liquid port;

[0007] The valve core assembly is movably disposed in the liquid storage chamber and is suitable for switching between a first position and a second position.

[0008] In the first position, the valve core assembly closes the first through hole, and the liquid storage chamber is in a full liquid state;

[0009] In the second position, the valve core assembly closes the second through hole, and the liquid storage chamber is in a full gas state.

[0010] According to a liquid reservoir provided by the present invention, the valve core assembly comprises:

[0011] Float;

[0012] A first thimble and a second thimble are arranged on upper and lower sides of the float;

[0013] And in the first position, the first ejector pin is located in the first through hole;

[0014] In the second position, the second ejector pin is located in the second through hole.

[0015] According to a liquid reservoir provided by the present invention, the first through hole and the second through hole are tapered holes, the expanded ends of the tapered holes face the liquid storage cavity; and the first ejector pin and the second ejector pin are conical ejector pins.

[0016] According to a liquid storage device provided by the present invention, the first through hole is located at the center of the first partition plate, and the second through hole is located at the center of the second partition plate.

[0017] According to a liquid storage device provided by the present invention, the gas port is connected to an air pipe, the first liquid port is connected to a first liquid pipe, and the second liquid port is connected to a second liquid pipe.

[0018] According to a liquid storage device provided by the present invention, the tank body is a pressure-resistant container.

[0019] A liquid storage device according to the present invention further includes: a guide assembly, the guide assembly including:

[0020] At least two guide rods are arranged side by side in the liquid storage cavity along the height direction of the liquid storage cavity, and the valve core assembly is movably connected to the guide rods.

[0021] The present invention also provides an air conditioning unit, comprising: an indoor heat exchanger, an outdoor heat exchanger and the above-mentioned liquid reservoir, wherein the gas port of the liquid reservoir is connected to the gas pipe end of the outdoor heat exchanger, the first liquid port of the liquid reservoir is connected to the liquid pipe end of the indoor heat exchanger, the second liquid port of the liquid reservoir is connected to the electronic expansion valve via the second liquid pipe, and the electronic expansion valve is connected to the liquid pipe end of the outdoor heat exchanger;

[0022] Wherein, the flow path diameter of the second liquid pipe is larger than the flow path diameter of the electronic expansion valve.

[0023] An air conditioning unit provided according to the present invention further includes:

[0024] compressor;

[0025] 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 pipe end of the indoor heat exchanger, and a fourth end of the four-way valve is connected to the air pipe end of the outdoor heat exchanger.

[0026] According to an air conditioning unit provided by the present invention, the effective volume of the liquid storage chamber of the liquid accumulator matches the difference in refrigerant demand quality between the air conditioning unit under full heating load conditions and full cooling load conditions.

[0027] The liquid storage device and air-conditioning unit provided by the present invention can actively store liquid or gas according to the pressure of the air cavity and the liquid cavity, realize active storage and discharge of the fluid, and can achieve the self-locking effect when full of liquid and full of gas, and have the characteristics of simple structure, high stability and reliability; at the same time, by setting up the liquid storage device, the air-conditioning unit can autonomously and stably adjust the circulation amount of the refrigerant in the circulation flow path according to the operating conditions, adapt to different operating conditions, and realize the purpose of high-efficiency and high-capacity operation of the air-conditioning unit for cooling in summer and heating in winter, thereby effectively improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 It is a structural schematic diagram of the liquid storage device provided by the present invention;

[0030] Figure 2 yes Figure 1 AA section view;

[0031] Figure 3 It is a structural schematic diagram of the air conditioning unit provided by the present invention;

[0032] Figure 4 It is a schematic diagram of the heating mode principle of the air-conditioning unit provided by the present invention;

[0033] Figure 5 It is a schematic diagram of the cooling mode principle of the air-conditioning unit provided by the present invention.

[0034] Reference numerals:

[0035] 100: liquid storage container; 101: tank body; 102: first partition plate; 1021: first through hole;

[0036] 103: second partition plate; 1031: second through hole;

[0037] 104: valve core assembly; 1041: float; 10411: guide hole;

[0038] 1042: first thimble; 1043: second thimble;

[0039] 105: air cavity; 1051: air port; 1052: trachea; 106: liquid storage cavity;

[0040] 107: liquid cavity; 1071: first liquid port; 1072: second liquid port;

[0041] 1073: first liquid pipe; 1074: second liquid pipe; 108: guide rod;

[0042] 200: indoor heat exchanger; 300: outdoor heat exchanger; 400: electronic expansion valve;

[0043] 500: compressor; 600: four-way valve. DETAILED DESCRIPTION

[0044] 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.

[0045] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] Combine the following Figure 1-Figure 5 The liquid storage device and the air conditioning unit of the present invention are described.

[0050] According to an embodiment of the first aspect of the present invention, referring to Figure 1 and Figure 2 As shown, the present invention provides a liquid storage device 100, which mainly includes: a tank body 101, a first partition plate 102, a second partition plate 103 and a valve core assembly 104. The tank body 101 is mainly a hollow structure, and the tank body 101 can be a shell made of metal or other materials.

[0051] The first partition 102 and the second partition 103 are arranged in the tank body 101 at intervals along the height direction of the tank body 101 to sequentially separate the air cavity 105, the liquid storage cavity 106 and the liquid cavity 107, that is, the tank body 101 is mainly composed of three cavities, the upper part is the air cavity 105, the middle part is the liquid storage cavity 106, that is, the effective liquid storage cavity, and the lower part is the liquid cavity 107, that is, the circulation flow path communication cavity; and the first partition 102 is provided with a first through hole 1021, through which The first through hole 1021 can connect the air cavity 105 with the liquid storage cavity 106, and the second partition plate 103 is provided with a second through hole 1031, through which the liquid storage cavity 106 and the liquid cavity 107 can be connected; the top of the air cavity 105 is provided with a gas port 1051 for introducing or discharging gas, and the bottom of the liquid cavity 107 is provided with a first liquid port 1071 and a second liquid port 1072, one of which is a liquid inlet and the other is a liquid outlet.

[0052] The valve core assembly 104 is movably disposed in the liquid storage chamber 106, and the valve core assembly 104 is suitable for switching between a first position and a second position. When the valve core assembly 104 moves to the first position, the valve core assembly 104 closes the first through hole 1021 of the first partition 102, and the liquid storage chamber 106 is in a full liquid state. At this time, the second through hole 1031 of the second partition 103 is in a conducting state, and the liquid chamber 107 is also in a full liquid state; when the valve core assembly 104 moves to the second position, the valve core assembly 104 closes the second through hole 1031 of the second partition 103, and the liquid storage chamber 106 is in a full gas state, that is, in a liquid emptying state, and the liquid chamber 107 is in a full liquid state. Therefore, the liquid chamber 107 is always in a full liquid state.

[0053] Specifically, when the pressure of the lower liquid chamber 107 is greater than the pressure of the upper air chamber 105, the liquid enters the liquid storage chamber 106 from the liquid chamber 107 through the second through hole 1031 of the second partition 103, and the valve core assembly 104 rises under the action of the pressure difference. At the same time, the gas in the original liquid storage chamber 106 enters the air chamber 105 through the first through hole 1021 of the first partition 102. When the valve core assembly 104 moves upward to close the first through hole 1021, the air chamber 105 is blocked. At this time, the pressure difference disappears, and the liquid storage chamber 106 is in a stable liquid storage state, achieving full liquid self-locking.

[0054] Similarly, when the pressure in the upper air cavity 105 is greater than the pressure in the lower liquid cavity 107, the gas enters the liquid storage cavity 106 from the air cavity 105 through the first through hole 1021 of the first partition 102, and the valve core assembly 104 descends under the action of the pressure difference. At the same time, the liquid stored in the liquid storage cavity 106 enters the liquid cavity 107 through the second through hole 1031 of the second partition 103. When the valve core assembly 104 moves downward to close the second through hole 1031, the liquid cavity 107 is blocked. At this time, the pressure difference disappears, and the liquid storage cavity 106 is in a stable gas storage state, achieving self-locking when full of gas.

[0055] It should be noted that the upper air chamber 105 and the lower liquid chamber 107 of the embodiment of the present invention serve as static pressure chambers, which can offset the influence of the increased dynamic pressure caused by the excessive flow rate of liquid or gas on the static pressure, thereby improving the stability of the pressure difference of the valve core assembly 104, the accuracy of the lifting action and the sealing performance.

[0056] Therefore, the liquid storage device 100 provided in the embodiment of the present invention can actively store liquid or gas according to the pressure of the air cavity 105 and the liquid cavity 107, realize the active storage and discharge of the fluid, and can achieve the self-locking effect when full of liquid and full of gas, and has the characteristics of simple structure, high stability and reliability.

[0057] According to one embodiment of the present invention, referring to Figure 1 and Figure 2As shown, the valve core assembly 104 includes: a float 1041, a first ejector pin 1042 and a second ejector pin 1043, and the first ejector pin 1042 and the second ejector pin 1043 are arranged on the upper and lower sides of the float 1041; and when the float 1041 moves to the first position under the action of the pressure difference, it drives the first ejector pin 1042 to move into the first through hole 1021 of the first partition 102, blocking the flow path between the air cavity 105 and the liquid storage cavity 106, and realizing the sealing self-locking; when the float 1041 moves to the second position under the action of the pressure difference, it drives the second ejector pin 1043 to move into the second through hole 1031 of the second partition 103, blocking the flow path between the liquid storage cavity 106 and the liquid cavity 107, and realizing the sealing self-locking.

[0058] According to one embodiment of the present invention, the first through hole 1021 and the second through hole 1031 are both tapered holes, and the expanded ends of the tapered holes of the first partition 102 and the second partition 103 are both facing the liquid storage chamber 106. Correspondingly, the conical hole of the upper first partition 102 is oriented toward the air chamber 105, and the conical hole of the lower second partition 103 is oriented toward the liquid chamber 107; and the first ejector pin 1042 and the second ejector pin 1043 are conical ejectors. With such a design, the upper conical ejector pin can be tightly clamped in the upper conical hole, or the lower conical ejector pin can be tightly clamped in the lower conical hole, effectively improving the sealing self-locking effect, thereby improving the stability and reliability of fluid storage.

[0059] According to one embodiment of the present invention, the first through hole 1021 is located at the center of the first partition 102, and the second through hole 1031 is located at the center of the second partition 103. At the same time, the first ejector pin 1042 and the second ejector pin 1043 are located at the center of the float 1041, and the first partition 102, the second partition 103 and the float 1041 are arranged concentrically. With such a design, the force uniformity of the float 1041 can be effectively improved, thereby improving the movement stability of the float 1041.

[0060] The specific shape of the float 1041 of the present invention is not particularly limited. For example, the shape of the float 1041 can be cylindrical, square, or the like.

[0061] According to one embodiment of the present invention, the air port 1051 of the upper air cavity 105 is connected to an air pipe 1052, the first liquid port 1071 of the lower liquid cavity 107 is connected to a first liquid pipe 1073, and the second liquid port 1072 is connected to a second liquid pipe 1074 to facilitate the flow of fluid in and out.

[0062] According to one embodiment of the present invention, the tank body 101 is a pressure-resistant container so as to improve the safety and reliability of the liquid storage device 100 .

[0063] Furthermore, the shape of the tank body 101 of the present invention is elliptical, specifically a racetrack shape, the two semicircular cavities at both ends of the racetrack shape are the air cavity 105 and the liquid cavity 107 respectively, and the middle cavity is the liquid storage cavity 106.

[0064] In addition, the specific materials of the first partition 102 and the second partition 103 of the present invention are not particularly limited. For example, the first partition 102 and the second partition 103 can be metal plates.

[0065] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 As shown, the liquid storage device 100 of the present invention also includes: a guide assembly, the guide assembly includes: at least two guide rods 108, at least two guide rods 108 are arranged side by side in the liquid storage cavity 106 along the height direction of the liquid storage cavity 106, that is, they are arranged at intervals along the vertical direction, and the valve core assembly 104 is movably connected to the guide rods 108.

[0066] In a specific example, three guide rods 108 are evenly distributed around the center of the float 1041 , the float 1041 is provided with three corresponding guide holes 10411 , and the three guide rods 108 pass through the three guide holes 10411 of the float 1041 one by one.

[0067] The embodiment of the present invention can guide the movement of the float 1041 by providing a guide component, so that the ejector pin on the float 1041 can be accurately aligned with the corresponding through hole, thereby improving the sealing self-locking effect and thus improving the stability and reliability.

[0068] The specific material of the guide rod 108 of the present invention is not particularly limited, as long as it can play a guiding role. For example, the guide rod 108 can be made of metal.

[0069] In the related art, the refrigerant demand flow of heat pump air conditioners under heating and cooling conditions differs greatly when outputting at full load. Specifically, the refrigerant mass flow required in summer cooling conditions is large, requiring more refrigerant charge, while the refrigerant mass flow required in winter heating conditions is small, requiring less refrigerant charge. Therefore, air conditioners designed for heating conditions will have insufficient refrigerant mass flow, insufficient cooling capacity, and reduced energy efficiency during summer cooling operation; and air conditioners designed for cooling conditions will have too much refrigerant during winter heating operation, which also leads to low energy efficiency.

[0070] To this end, the present invention can autonomously adjust the refrigerant circulation volume by cleverly applying the liquid storage device 100 of the above-mentioned embodiment to the air-conditioning unit. During winter heating, the liquid storage device 100 can store a part of the refrigerant liquid so that it does not participate in the circulation. During summer cooling, the liquid storage device 100 can release all the stored refrigerant liquid so that it participates in the circulation, thereby achieving the purpose of high-efficiency and high-capacity operation of the air-conditioning unit for both summer cooling and winter heating.

[0071] According to an embodiment of the second aspect of the present invention, referring to Figure 3-Figure 5 As shown, the present invention also provides an air-conditioning unit, mainly comprising: an indoor heat exchanger 200, an outdoor heat exchanger 300 and a liquid reservoir 100 of the above embodiment, wherein the gas port 1051 of the liquid reservoir 100 is connected to the gas pipe end of the outdoor heat exchanger 300 via the gas pipe 1052, the first liquid port 1071 of the liquid reservoir 100 is connected to the liquid pipe end of the indoor heat exchanger 200 via the first liquid pipe 1073, the second liquid port 1072 of the liquid reservoir 100 is connected to the electronic expansion valve 400 via the second liquid pipe 1074, and the electronic expansion valve 400 is connected to the liquid pipe end of the outdoor heat exchanger 300; wherein the flow path diameter of the second liquid pipe 1074 is larger than the flow path diameter of the electronic expansion valve 400, that is, the liquid resistance of the second liquid pipe 1074 is smaller than the liquid resistance of the electronic expansion valve 400.

[0072] According to one embodiment of the present invention, the air-conditioning unit of the present invention further includes: a compressor 500 and a four-way valve 600, the first end a of the four-way valve 600 is connected to the exhaust port of the compressor 500, the second end b of the four-way valve 600 is connected to the intake port of the compressor 500, the third end c of the four-way valve 600 is connected to the air pipe end of the indoor heat exchanger 200, and the fourth end d of the four-way valve 600 is connected to the air pipe end of the outdoor heat exchanger 300.

[0073] According to an embodiment of the present invention, the indoor heat exchanger 200 of the present invention is a shell and tube heat exchanger, and the outdoor heat exchanger 300 is a fin heat exchanger.

[0074] Combine the following Figure 4 and Figure 5 The operation modes of the air conditioning unit provided by the present invention are described as follows: winter heating mode and summer cooling mode. The flow direction of the fluid medium is shown in the direction indicated by the arrow in the figure.

[0075] like Figure 4As shown, winter heating mode: when the air-conditioning unit is in the heating condition, the first end a of the four-way valve 600 is connected to the third end c, and the second end b is connected to the fourth end d. The high-temperature and high-pressure refrigerant gas generated by the compressor 500 is condensed and releases heat through the indoor heat exchanger 200, and the generated refrigerant liquid enters the liquid chamber 107 of the liquid reservoir 100 through the first liquid pipe 1073. At this time, since the outdoor heat exchanger 300 is the low-pressure side and the indoor heat exchanger 200 is the high-pressure side, that is, the upper air chamber 105 of the liquid reservoir 100 is the low-pressure side, and the lower liquid chamber 107 of the liquid reservoir 100 is the high-pressure side, the pressure of the lower liquid chamber 107 is greater than the pressure of the upper air chamber 105, and the float 1041 rises under the action of the pressure difference, and the refrigerant liquid enters the liquid storage chamber 106 from the tapered hole of the lower second partition plate 103. As the liquid level rises, the float 1041 rises under the action of the buoyancy of the liquid, and the gas in the original liquid storage chamber 106 enters the air chamber 105 through the tapered hole of the upper first partition 102, and then enters the compressor 500 through the air pipe 1052, the fourth end d and the second end b of the four-way valve 600. When the float 1041 floats to the top of the liquid storage chamber 106, the conical ejector pin on the upper side of the float 1041 is inserted into the tapered hole of the upper first partition 102 to block the air chamber. At this time, the pressure difference disappears and the liquid storage chamber is in a stable liquid storage state; at the same time, the refrigerant liquid in the liquid chamber 107 flows through the second liquid pipe 1074 and passes through the electronic expansion valve 400 for throttling, then flows into the outdoor heat exchanger 300 to absorb heat and evaporate, and then flows back to the compressor 500 through the fourth end d and the second end b of the four-way valve 600.

[0076] It can be understood that since the liquid resistance of the electronic expansion valve 400 is greater than the liquid resistance of the second liquid pipe 1074, this can ensure that the liquid storage chamber 106 quickly reaches a full liquid state, thereby improving the liquid storage efficiency, so that the circulating amount of refrigerant participating in the circulation in the air-conditioning unit can quickly adapt to the operating conditions and improve the operating energy efficiency.

[0077] Furthermore, when the liquid storage chamber 106 is in a full liquid state, if the liquid storage tank 100 is heated and the refrigerant liquid in the liquid storage chamber 106 absorbs heat and flashes out refrigerant gas, the refrigerant gas accumulates more and more in the upper part of the liquid storage chamber 106, the liquid level drops, and the buoyancy of the float 1041 decreases. At this time, the pressure on the conical ejector pin on the upper side of the float 1041 is not enough to resist the gravity of the float 1041. As the float 1041 drops with the liquid level, the conical ejector pin on the upper side of the float 1041 temporarily detaches from the conical hole of the upper first partition 102, and the flashed out refrigerant gas enters the air cavity 105 through the conical hole of the upper first partition 102. The liquid level in the liquid storage chamber 106 rises again, the float 1041 floats up, and the conical ejector pin on the upper side of the float 1041 is again inserted into the conical hole of the upper first partition 102 to form a seal, and this process is repeated, thereby ensuring that the liquid storage chamber 106 is always in a full liquid state.

[0078] like Figure 5As shown, in summer cooling mode: when the air-conditioning unit is in cooling working condition, the four-way valve 600 is switched, the first end a of the four-way valve 600 is connected to the fourth end d, the second end b is connected to the third end c, and a part of the high-temperature and high-pressure refrigerant gas generated by the compressor 500 flows into the outdoor heat exchanger 300 to condense and release heat. The generated refrigerant liquid is throttled by the electronic expansion valve 400 and then enters the liquid chamber 107 of the liquid reservoir 100 through the second liquid pipe 1074. At this time, the outdoor heat exchanger 300 is on the high-pressure side and the indoor heat exchanger 200 is on the low-pressure side, that is, the upper air chamber 105 of the liquid reservoir 100 is on the high-pressure side, and the lower liquid chamber 107 of the liquid reservoir 100 is on the low-pressure side. The pressure of the upper air chamber 105 is greater than the pressure of the lower liquid chamber 107. First, the liquid in the liquid storage chamber 106 will be throttled by the indoor heat exchanger 200 under the action of gravity. 0 forms a communicating vessel effect to automatically balance the liquid level. The liquid level itself has a downward trend. In addition, due to the gravity of the float 1041 and the pressure difference at the upper conical ejector pin, the float 1041 drops, driving the upper conical ejector pin to separate from the conical hole of the upper first partition 102. At this time, another part of the refrigerant gas of the compressor 500 enters the gas cavity 105 through the gas pipe 1052, and then enters the liquid storage cavity 106 through the conical hole of the upper first partition 102. Under the action of the pressure difference, the liquid level drops faster, and the float 1041 drops with the liquid level. When the float 1041 falls to the conical hole of the lower second partition 103, the conical ejector pin on the lower side of the float 1041 is inserted into the conical hole of the lower second partition 103 to form a seal. At this time, the pressure difference disappears, and the liquid storage cavity 106 is in a full gas state, that is, in a liquid emptying state. At the same time, the refrigerant liquid in the liquid cavity 107 flows through the first liquid pipe 1073 and passes through the indoor heat exchanger 200 to absorb heat and evaporate, and then flows back to the compressor 500 through the third end c and the second end b of the four-way valve 600.

[0079] It is understandable that when the air-conditioning unit is operated in cooling mode for the first time, there is no refrigerant liquid in the liquid storage tank 100. At this time, under the action of the pressure difference, the conical ejector pin on the lower side of the float 1041 is inserted into the conical hole of the lower second partition 103 to form a seal. The liquid storage chamber 106 is in a full gas state, and the refrigerant liquid in the circulating flow path of the air-conditioning unit cannot enter the liquid storage chamber 106, thereby keeping the refrigerant circulation amount in the circulating flow path of the air-conditioning unit in a relatively stable state under cooling conditions.

[0080] Furthermore, when the liquid storage chamber 106 is in a full gas state, if the liquid storage device 100 is cooled and causes the gas in the liquid storage chamber 106 to condense into liquid, the liquid continues to accumulate and rise, and the float 1041, under the buoyancy of the liquid, overcomes the pressure increase at the conical hole of the lower second partition 103, and the conical ejector pin on the lower side of the float 1041 temporarily detaches from the conical hole of the lower second partition 103. Under the action of the pressure difference, the liquid enters the liquid chamber 107 through the conical hole of the lower second partition 103, and the float 1041 falls again to form a seal, and this process is repeated, thereby ensuring that the liquid storage chamber 106 is always in a liquid-empty state.

[0081] Therefore, the liquid storage in the liquid storage device of the air-conditioning unit provided by the embodiment of the present invention is stable, and the liquid storage chamber 106 can be kept in a full liquid state in winter. No matter how the compressor 500 changes frequency or how the condensing pressure changes, part of the refrigerant liquid stored inside will not be released, so that it does not participate in the circulation; and the liquid storage chamber 106 can be kept in a full gas state in summer. No matter how the evaporation pressure changes, liquid will not enter, thereby realizing active and stable regulation of the quality of the refrigerant participating in the circulation under cooling conditions and heating conditions, so that the air-conditioning unit can achieve high efficiency and high capacity operation under dual operating conditions.

[0082] According to one embodiment of the present invention, the effective volume of the liquid storage chamber 106 of the liquid storage device 100 matches the difference in refrigerant demand quality between the heating full load condition and the cooling full load condition of the air conditioning unit.

[0083] With this design, the refrigerant circulation volume in the circulation flow path can be autonomously and accurately adjusted according to the operating conditions, adapting to different operating conditions, and achieving high-efficiency and high-capacity operation of the air-conditioning unit for both cooling in summer and heating in winter, thereby effectively improving the user experience.

[0084] For example, the air-conditioning unit of the present invention is charged with refrigerant according to the full-load working condition of summer cooling. Assuming that the mass of refrigerant required for the summer cooling condition is 1 kg and the mass of refrigerant required for the winter heating condition is 700 g, the mass difference of the refrigerant required for the dual working conditions is 300 g.

[0085] During summer cooling, the liquid storage chamber 106 is in a full gas state, and the refrigerant circulation volume is maintained at 1kg, which is suitable for summer cooling conditions; during winter heating, the liquid storage chamber 106 is in a full liquid state, storing 300g, and the refrigerant circulation volume reaches 700g, which is suitable for winter heating conditions.

[0086] It can be understood that the mass of the stored refrigerant is equal to the product of the effective volume of the liquid storage chamber 106 and the density of the refrigerant.

[0087] Moreover, during the summer cooling condition, the liquid storage chamber 106 contains gas, and during the winter heating condition, the liquid storage chamber 106 contains liquid. Under the same effective volume, the mass of the stored liquid is much greater than the mass of the gas. Therefore, the mass of the refrigerant gas stored in the full gas state is very small and can be ignored, which has basically no effect on the operation of the summer cooling condition.

[0088] In summary, the air-conditioning unit provided by the embodiment of the present invention can store a portion of the refrigerant liquid during winter heating to reduce the refrigerant circulation volume, and can prevent the refrigerant liquid from entering the liquid storage chamber or release the stored refrigerant liquid during summer heating to maintain or increase the refrigerant circulation volume. Therefore, the present invention can autonomously and stably adjust the refrigerant circulation volume according to the dual-mode operation mode of the air-conditioning unit, thereby improving the dual-mode operation energy efficiency of the air-conditioning unit.

[0089] 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 liquid storage device, characterized in that: include: Tank; A first partition plate and a second partition plate are arranged in the tank body at intervals along the height direction of the tank body to sequentially separate the air cavity, the liquid storage cavity and the liquid cavity, and the first partition plate is provided with a first through hole, the second partition plate is provided with a second through hole, the air cavity is provided with an air port, and the liquid cavity is provided with a first liquid port and a second liquid port; The valve core assembly is movably disposed in the liquid storage chamber and is suitable for switching between a first position and a second position. In the first position, the valve core assembly closes the first through hole, and the liquid storage chamber is in a full liquid state; In the second position, the valve core assembly closes the second through hole, and the liquid storage chamber is in a full gas state.

2. The liquid storage device according to claim 1, characterized in that: The valve core assembly comprises: Float; A first thimble and a second thimble are arranged on upper and lower sides of the float; And in the first position, the first ejector pin is located in the first through hole; In the second position, the second ejector pin is located in the second through hole.

3. The liquid reservoir according to claim 2, characterized in that The first through hole and the second through hole are tapered holes, and the expanded ends of the tapered holes face the liquid storage cavity; and the first ejector pin and the second ejector pin are conical ejector pins.

4. The liquid reservoir according to claim 1, characterized in that The first through hole is located at the center of the first partition plate, and the second through hole is located at the center of the second partition plate.

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

6. The liquid reservoir according to claim 1, characterized in that The tank body is a pressure-resistant container.

7. The liquid storage device according to any one of claims 1 to 6, characterized in that: Also includes: A guide assembly, the guide assembly comprising: At least two guide rods are arranged side by side in the liquid storage cavity along the height direction of the liquid storage cavity, and the valve core assembly is movably connected to the guide rods.

8. An air conditioning unit, characterized in that: include: An indoor heat exchanger, an outdoor heat exchanger, and a liquid reservoir according to any one of claims 1 to 7, wherein the gas port of the liquid reservoir is connected to the gas pipe end of the outdoor heat exchanger, the first liquid port of the liquid reservoir is connected to the liquid pipe end of the indoor heat exchanger, the second liquid port of the liquid reservoir is connected to an electronic expansion valve via a second liquid pipe, and the electronic expansion valve is connected to the liquid pipe end of the outdoor heat exchanger; Wherein, the flow path diameter of the second liquid pipe is larger than the flow path diameter of the electronic expansion valve.

9. The air conditioning unit according to claim 8, 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 pipe end of the indoor heat exchanger, and a fourth end of the four-way valve is connected to the air pipe end of the outdoor heat exchanger.

10. The air conditioning unit according to claim 8, characterized in that: The effective volume of the liquid storage chamber of the liquid storage device matches the difference in refrigerant demand quality between the heating full load condition and the cooling full load condition of the air conditioning unit.

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