Air conditioning system

Abstract

The utility model relates to the technical field of air conditioner efficiency improvement, and discloses an air conditioner system which comprises a refrigerant heat exchange module and a heat exchange module. The liquid storage device is connected to the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger in series and used for recycling and storing redundant refrigerant from the refrigerant circulation loop and / or releasing the refrigerant to the refrigerant circulation loop; the pressurizing bypass assembly comprises a pressurizing pump and a bypass branch; wherein one end of the bypass branch is connected to the liquid storage device, the other end of the bypass branch is connected to a refrigerant pipeline on the side of the outdoor heat exchanger / the indoor heat exchanger, and the booster pump is arranged on the bypass branch and is configured to controllably pump a refrigerant in the liquid storage device to the side of the outdoor heat exchanger / the indoor heat exchanger. The liquid storage device and the pressurization bypass assembly are additionally arranged on the air conditioner refrigerant circulation loop, the actual refrigerant circulation amount, the refrigerant flow speed and the pressure in the refrigerant circulation loop can be increased, the influence of partial pipeline pressure loss is offset, and then the refrigerant conveying efficiency and the system heat exchange effect are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning efficiency enhancement, for example, to an air conditioning system. Background Art

[0002] At present, the central air conditioners on the market are mainly divided into two series: chillers and multi-split units. Among them, the multi-split air conditioning system is a model in which one outdoor unit is connected to several indoor units by piping. It has the advantages of convenient installation and good cooling effect. It is widely used in commercial buildings such as office buildings and apartments, and can meet the cooling / heating needs of multiple indoor places at the same time.

[0003] Generally, the outdoor unit of a multi-split air-conditioning system is placed on the roof or exterior wall of a building, while the indoor units are installed on the indoor walls of floors at different heights. This requires a long pipe to connect the outdoor and indoor units. The piping length of an ordinary multi-split air-conditioning system can even reach more than 120 meters. At the same time, due to the height of the floors, the height difference between the outdoor and indoor units can reach 50 meters, and the height difference between different indoor units can reach 30 meters.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The piping length of a multi-split air conditioning system affects the flow pressure of the refrigerant, and thus affects the heat exchange effect on the indoor unit side. Experiments have found that when the piping length is too long or the height difference between the indoor and outdoor units is too large, the cooling capacity of the air conditioning system will decay. For every 100 meters increase in piping length, the cooling capacity will decay by about 10% to 15%, and for every 20 meters increase in the height difference between the indoor and outdoor units, the cooling capacity will decay by about 3% to 12%. Therefore, multi-split air conditioning systems are limited by factors such as piping length and the height difference between the indoor and outdoor units, making them difficult to apply in some special installation scenarios.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiment provides an air conditioning system to solve the technical problems of large flow path pressure loss and insufficient refrigerant amount caused by piping length and drop in the air conditioning system in the related art.

[0009] According to an embodiment of the first aspect of the present application, there is provided an air conditioning system, comprising:

[0010] A refrigerant heat exchange module, which includes a compressor, an outdoor heat exchanger and an indoor heat exchanger, and is connected by a refrigerant pipeline to form a refrigerant circulation loop;

[0011] A liquid storage device, connected in series to the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, used to recover and store excess refrigerant from the refrigerant circulation loop, and / or release refrigerant to the refrigerant circulation loop;

[0012] The boost bypass component includes a boost pump and a bypass branch; one end of the bypass branch is connected to a liquid storage device, and the other end is connected to a refrigerant pipeline on the outdoor heat exchanger / indoor heat exchanger side. The boost pump is arranged on the bypass branch, and is configured to controllably pump the refrigerant in the liquid storage device to the outdoor heat exchanger / indoor heat exchanger side.

[0013] In some optional embodiments, the boost bypass assembly includes a first boost bypass assembly, and the first boost bypass assembly includes:

[0014] A first bypass branch, one end of which is connected to the liquid storage device, and the other end of which is connected to the refrigerant pipeline between the liquid storage device and the outdoor heat exchanger;

[0015] The first booster pump is disposed on the first bypass branch and is configured to have at least a first activation state for pumping the refrigerant from the liquid storage device to the outdoor heat exchanger side when the refrigerant circulation loop is in a heating flow direction.

[0016] In some optional embodiments, the refrigerant circulation loop has a first parallel pipe section connected in series between the liquid storage device and the outdoor heat exchanger, and two ends of the first bypass branch are respectively connected in parallel with two ends of the first parallel pipe section;

[0017] The first boost bypass assembly further includes a first control valve disposed on the first parallel pipe section and configured to be in a closed state at least when the first boost pump is in a first enabled state.

[0018] In some optional embodiments, the refrigerant heat exchange module further includes an outdoor throttling element, which is arranged on the outdoor heat exchanger side;

[0019] The first bypass branch and the first parallel pipe section are arranged between the liquid storage device and the outdoor throttling element.

[0020] In some optional embodiments, the first boost bypass assembly further includes a first one-way valve disposed on the first bypass branch, and the conduction direction of the first one-way valve is configured to be from the liquid storage device pump to the outdoor heat exchanger side.

[0021] In some optional embodiments, the boost bypass assembly includes a second boost bypass assembly, and the second boost bypass assembly includes:

[0022] A second bypass branch, one end of which is connected to the liquid storage device, and the other end of which is connected to the refrigerant pipeline between the liquid storage device and the indoor heat exchanger;

[0023] The second booster pump is disposed on the second bypass branch and is configured to have at least a second activation state for pumping the refrigerant from the liquid storage device to the indoor heat exchanger side when the refrigerant circulation loop is in a cooling flow direction.

[0024] In some optional embodiments, the refrigerant circulation loop has a second parallel pipe section connected in series between the liquid storage device and the indoor heat exchanger, and two ends of the second bypass branch are respectively connected in parallel with two ends of the second parallel pipe section;

[0025] The second boost bypass assembly further includes a second control valve disposed on the second parallel pipe section and configured to be in a closed state at least when the second boost pump is in a second enabled state.

[0026] In some optional embodiments, the refrigerant heat exchange module further includes an indoor throttling element, which is arranged on the indoor heat exchanger side;

[0027] The second bypass branch and the second parallel pipe section are arranged between the liquid storage device and the indoor throttling element.

[0028] In some optional embodiments, the first boost bypass assembly further includes a second one-way valve disposed on the second bypass branch, and the conduction direction of the second one-way valve is configured to be from the liquid storage device pump to the indoor heat exchanger side.

[0029] In some optional embodiments, the type of air conditioning system is a multi-split air conditioner.

[0030] The air conditioning system provided by the embodiment of the present disclosure can achieve the following technical effects:

[0031] In the disclosed embodiment, a liquid storage device and a pressurization bypass assembly are additionally provided on the refrigerant circulation loop of the air conditioner, wherein the liquid storage device stores refrigerant that can be used for fluid replenishment. The pressurization bypass device can be used to pump refrigerant to the low-pressure side of the refrigerant circulation loop when the refrigerant amount in the circulation loop is insufficient, the pressure loss in the flow path is excessive, etc., thereby increasing the actual refrigerant circulation amount in the refrigerant circulation loop, and the high flow rate and pressure of the pumped refrigerant can also offset part of the pipeline pressure loss, thereby ensuring the refrigerant transportation efficiency and the cooling / heating effect of the air-conditioning system.

[0032] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0034] Figure 1 is a schematic diagram of the structure of an air conditioning system provided in Embodiment (I) of the present disclosure;

[0035] Figure 1a is an equivalent flow diagram of the air conditioning system provided by Embodiment (I) of the present disclosure in a first activation state;

[0036] Figure 1b is an equivalent flow diagram of the air conditioning system provided by Embodiment (I) of the present disclosure in a first deactivated state;

[0037] Figure 2 is a structural schematic diagram of an air conditioning system provided in Embodiment (II) of the present disclosure;

[0038] Figure 2a is an equivalent flow diagram of the air conditioning system provided by Embodiment (II) of the present disclosure in the second activation state;

[0039] Figure 2b is an equivalent flow diagram of the air conditioning system provided by Embodiment (II) of the present disclosure in the second deactivated state;

[0040] Figure 3 is a schematic diagram of the structure of an air conditioning system provided in Embodiment (III) of the present disclosure;

[0041] Figure 3a is an equivalent flow diagram of the air conditioning system operating in the heating mode provided in the third embodiment of the present disclosure;

[0042] Figure 3b is an equivalent flow diagram of the air conditioning system provided in the third embodiment of the present disclosure in the cooling mode;

[0043] Figure 3c It is an equivalent flow diagram of the air-conditioning system operating in cooling mode provided in Embodiment (three) of the present disclosure.

[0044] Reference numerals:

[0045] 10. Compressor; 20. Outdoor heat exchanger; 21. Outdoor throttling device; 30. Indoor heat exchanger; 31. Indoor throttling device; 40. Four-way valve; 50. Gas-liquid separator;

[0046] 60. Liquid storage device;

[0047] 71. first bypass branch; 72. first booster pump; 73. first parallel pipe section; 74. first control valve; 75. first check valve;

[0048] 81. Second bypass branch; 82. Second booster pump; 83. Second parallel pipe section; 84. Second control valve; 85. Second one-way valve. DETAILED DESCRIPTION

[0049] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0050] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0051] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0052] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0053] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0054] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0055] The present application discloses an air conditioning system, which can be applied to various types of air conditioners such as "one-to-one" and "one-to-many", and is used to realize the control operation of environmental parameters such as cooling, heating, and dehumidification of a single space area and multiple different space areas, so as to improve the comfort of the indoor environment and ensure the user experience. Optional, the specific models of the "one-to-one" air conditioner include but are not limited to wall-mounted air conditioners, cabinet air conditioners, etc., and the specific models of the "one-to-many" air conditioner include but are not limited to multi-split central air conditioners, multi-split duct air conditioners, etc.

[0056] Combination Figures 1 to 3c As shown, the embodiment of the present disclosure provides an air conditioning system, which at least includes a refrigerant heat exchange module, a liquid storage device 60 and a boost bypass component. Among them, the refrigerant heat exchange module is used to exchange heat with the indoor environment and the outdoor environment to achieve functions such as cooling the indoor temperature in the cooling mode and heating the indoor temperature in the heating mode. The liquid storage device 60 is installed in the refrigerant heat exchange module and participates in the refrigerant circulation of the refrigerant heat exchange module. It can controllably recover and store excess refrigerant from the refrigerant circulation loop of the refrigerant heat exchange module, and / or release refrigerant to the refrigerant circulation loop, so as to adjust the actual refrigerant circulation volume of the refrigerant circulation loop. The boost bypass component is used to connect the liquid storage device 60 with the refrigerant circulation loop, and can make the refrigerant in the liquid storage device 60 be sent into the refrigerant circulation loop at a higher flow rate or hydraulic pump, so as to improve the refrigerant delivery rate and delivery pressure in the refrigerant circulation refrigerant, thereby improving the heat exchange efficiency of the air conditioning system.

[0057] In the disclosed embodiment, a liquid storage device 60 and a boost bypass assembly are additionally provided on the refrigerant circulation loop of the air conditioner, wherein the liquid storage device 60 stores refrigerant that can be used for fluid replenishment. The boost bypass device can be used to pump refrigerant to the low-pressure side of the refrigerant circulation loop when the refrigerant amount in the circulation loop is insufficient, the pressure loss in the flow path is too large, etc., thereby increasing the actual refrigerant circulation amount in the refrigerant circulation loop. The high flow rate and pressure of the pumped refrigerant can also offset part of the pipeline pressure loss, thereby ensuring the refrigerant transportation efficiency and the cooling / heating effect of the air-conditioning system.

[0058] In some optional embodiments, the components of the refrigerant heat exchange module mainly include a compressor 10, an outdoor heat exchanger 20, an indoor heat exchanger 30, a four-way valve 40 and a gas-liquid separator 50, and the components are connected through refrigerant pipelines to form a refrigerant circulation loop.

[0059] Specifically, the compressor 10 is used to compress the refrigerant in a low (medium) pressure / low (medium) temperature state to a high temperature / high pressure state, and discharge it into the refrigerant circulation loop through the exhaust port of the compressor 10. The outdoor heat exchanger 20 is arranged on the outdoor side, for example, installed on the outdoor unit of the air conditioner, which can be used to make the refrigerant flowing through it exchange heat with the outdoor environment, for example, make the low-temperature refrigerant absorb heat from the outdoor environment, or make the high-temperature refrigerant release heat to the outdoor environment. The indoor heat exchanger 30 is arranged on the indoor side, for example, installed on the indoor unit of the air conditioner, which can be used to make the refrigerant flowing through it exchange heat with the indoor environment, for example, make the low-temperature refrigerant absorb heat from the indoor environment, or make the high-temperature refrigerant release heat to the indoor environment. The four-way valve 40 is used to switch the refrigerant flow direction in the refrigerant circulation loop, so as to at least allow the refrigerant to circulate along the cooling flow direction or the heating flow direction.

[0060] Furthermore, taking the air conditioning system operating in cooling mode or dehumidification mode as an example, the refrigerant circulation loop of the refrigerant heat exchange module in these two modes circulates the refrigerant according to the aforementioned refrigeration flow direction. The refrigerant flow sequence defined by the refrigeration flow direction is "compressor 10→outdoor heat exchanger 20→indoor heat exchanger 30→compressor 10", that is, in this refrigeration flow state, the refrigerant flows from the outdoor heat exchanger 20 to the indoor heat exchanger 30.

[0061] And, taking the heating mode of the air conditioning system as an example, in this mode, the refrigerant circulation loop of the refrigerant heat exchange module circulates the refrigerant according to the aforementioned heating flow direction. The refrigerant flow sequence defined by the heating flow direction is "compressor 10→indoor heat exchanger 30→outdoor heat exchanger 20→compressor 10", that is, in this heating flow state, the refrigerant flows from the indoor heat exchanger 30 to the outdoor heat exchanger 20.

[0062] In some optional embodiments, the liquid storage device 60 is connected in series to the refrigerant pipeline between the outdoor heat exchanger 20 and the indoor heat exchanger 30. Therefore, in the above-mentioned cooling flow direction and heating flow direction, the refrigerant flowing through the refrigerant pipeline between the outdoor heat exchanger 20 and the indoor heat exchanger 30 will also flow through the liquid storage device 60, so that at least the excess refrigerant can be stored when flowing through the liquid storage device 60, or the refrigerant can be replenished from the liquid storage device 60 into the refrigerant circulation reflux.

[0063] Specifically, the liquid storage device 60 includes a liquid storage tank body and a first port and a second port opened on the liquid storage tank body.

[0064] The liquid storage tank body has a hollow structure inside, which is used to construct a space for storing refrigerant, and excess refrigerant can be stored in the liquid storage tank body. In addition, the first port and the second port are respectively connected to the internal space of the liquid storage tank body, and the first port is connected to the refrigerant pipeline on the side of the outdoor heat exchanger 20 to achieve flow communication between the outdoor heat exchanger 20 and the liquid storage tank body; and the second port is connected to the refrigerant pipeline on the side of the indoor heat exchanger 30 to achieve flow communication between the indoor heat exchanger 30 and the liquid storage tank body.

[0065] Thus, in the cooling flow direction shown in the above embodiment, the refrigerant output by the outdoor heat exchanger 20 flows into the liquid storage tank body through the first port, and then the refrigerant flows out of the liquid storage tank body through the second port and flows to the indoor heat exchanger 30. Also, in the heating flow direction shown in the above embodiment, the refrigerant output by the indoor heat exchanger 30 flows into the liquid storage tank body through the second port, and then the refrigerant flows out of the liquid storage tank body through the first port and flows to the outdoor heat exchanger 20. In the above process, the excess refrigerant in the refrigerant circulation loop is retained in the liquid storage tank body, so that the refrigerant storage capacity in the liquid storage tank body increases, or part of the original refrigerant in the liquid storage tank body is carried together to participate in the refrigerant circulation, so that the refrigerant storage capacity in the liquid storage tank body decreases.

[0066] In some optional embodiments, the boost bypass assembly includes a boost pump and a bypass branch, wherein the bypass branch is used to connect the liquid storage device 60 and the refrigerant circulation loop, and the boost pump is arranged on the bypass branch, which can be used to pump the refrigerant in the liquid outlet device into the refrigerant circulation reflux in a certain hydraulic manner.

[0067] Specifically, the booster pump is connected in series to the bypass branch, and it can extract the refrigerant on the upstream side of the bypass branch and pump it to the downstream side of the bypass branch. In this embodiment, the liquid storage tank is located on the upstream side of the bypass branch, and the outdoor heat exchanger 20 / indoor heat exchanger 30 of the refrigerant circulation loop is located on the downstream side of the bypass branch. Therefore, the combination of the booster pump and the bypass branch in this embodiment can effectively increase the pumping speed or pumping pressure of the refrigerant from the liquid storage tank to the outdoor heat exchanger 20 / indoor heat exchanger 30.

[0068] In an embodiment, one end of the bypass branch is connected to the liquid storage device 60, such as the first port and / or the second port of the liquid storage tank body in the above embodiment; and the other end of the bypass branch is connected to the refrigerant pipeline on the outdoor heat exchanger 20 / indoor heat exchanger 30 side.

[0069] Optionally, the types of booster pumps include but are not limited to centrifugal pumps, vortex pumps, gear pumps, diaphragm pumps, and the like.

[0070] The specific structure of the air conditioning system of the present application is described below in conjunction with several optional embodiments. In the relevant drawings, solid arrows represent the heating flow direction, and dashed arrows represent the cooling flow direction.

[0071] Embodiment (I)

[0072] For a heating-only air conditioner, or for a cooling / heating dual-function air conditioner that only requires boost pumping of refrigerant in heating mode, the boost bypass component includes a first boost bypass component, which is arranged between the outdoor heat exchanger 20 and the liquid storage device 60, so as to realize the refrigerant boost pumping operation from the liquid storage device 60 to the outdoor heat exchanger 20.

[0073] Specifically, if Figure 1 As shown, the first boost bypass assembly includes a first bypass branch 71 and a first boost pump 72 .

[0074] One end of the first bypass branch 71 is connected to the liquid storage device 60, specifically to the first port of the liquid storage tank; the other end of the first bypass branch 71 is connected to the refrigerant pipeline between the liquid storage device 60 and the outdoor heat exchanger 20. The first booster pump 72 is disposed on the first bypass branch 71, and can be used to pump the refrigerant from the liquid storage device 60 to the outdoor heat exchanger 20 side.

[0075] Here, the first booster pump 72 has at least a first enabled state and a first disabled state. In the first enabled state, the first booster pump 72 is running, the first bypass branch 71 is in a conducting state, and the refrigerant can be pumped from the liquid storage device 60 to the outdoor heat exchanger 20 side. Figure 1a In the first deactivated state, the first booster pump 72 is not running, the first bypass branch 71 is in a blocked state, at which time the refrigerant cannot flow through the first bypass branch 71 to the outdoor heat exchanger 20 side, such as Figure 1b shown.

[0076] Optionally, the first enabled state corresponds to the refrigerant circulation return of the refrigerant heat exchange module being in a heating flow direction state, such as the heating-only air conditioner in the previous text is in an on-operating state, or the cooling / heating dual-function air conditioner in the previous text is switched to a heating mode operating state.

[0077] Alternatively, in the first inactive state, the first booster pump 72 can also be used as a common passage, that is, in this state, the first bypass branch 71 is also in a conducting state, and the refrigerant can normally flow from the liquid storage device 60 to the outdoor heat exchanger 20. However, in this state, the refrigerant flowing through the first bypass branch 71 cannot be pressurized by the first booster pump 72, and therefore does not have the effect of increasing the speed / pressure of the refrigerant circulation.

[0078] Further, in some optional embodiments, such as Figure 1As shown, the refrigerant circulation loop also has a first parallel pipe section 73 connected in series between the liquid outlet device and the outdoor heat exchanger 20, and the two ends of the first bypass branch 71 are respectively connected in parallel with the two ends of the first parallel pipe section 73, that is, one end of the first parallel pipe section 73 is connected to the liquid outlet device (first port), and the other end is connected to the outdoor heat exchanger 20 side. Therefore, the refrigerant can also flow through the first parallel pipe section 73 between the liquid storage device 60 and the outdoor heat exchanger 20 side, and the refrigerant flow direction can be from the liquid storage device 60 to the outdoor heat exchanger 20 side, or from the outdoor heat exchanger 20 side to the liquid storage device 60.

[0079] Meanwhile, a first control valve 74 is provided on the first parallel pipe section 73 , and the first control valve 74 can be used to control the on-off state of the first parallel pipe section 73 .

[0080] Optionally, when the first boost pump 72 is in the first enabled state, the first control valve 74 is in the closed state. At this time, the refrigerant in the liquid storage device 60 is only transported to the outdoor heat exchanger 20 through the first bypass branch 71, and the first parallel pipe section 73 is in the blocked state. Figure 1a As shown. And, when the first boost pump 72 is in the first deactivated state, the first control valve 74 is in the open state, as shown in FIG. Figure 1b As shown, at this time, the refrigerant can flow between the liquid storage device 60 and the outdoor heat exchanger 20 through the first parallel pipe section 73. For example, for a cooling / heating dual-function air conditioner, when it switches to the cooling mode, the first booster pump 72 is in a first disabled state, and the first control valve 74 is in an open state, so that the refrigerant can flow from the outdoor heat exchanger 20 to the liquid storage device 60 side through the first parallel pipe section 73.

[0081] In some optional embodiments, the components of the refrigerant heat exchange module also include an outdoor throttling device 21, which is arranged on the side of the outdoor heat exchanger 20. Specifically, the refrigerant circulation loop is on the liquid inlet side of the outdoor heat exchanger 20 flowing downward from the heating flow. The outdoor throttling device 21 can be used to perform throttling operations on the refrigerant flowing through it.

[0082] Optionally, the types of the outdoor throttling element 21 include but are not limited to electronic expansion valves, capillaries, etc. The outdoor throttling element 21 used in this embodiment is an electronic expansion valve, which can adjust the throttling opening according to the working conditions, thereby improving the heat exchange efficiency.

[0083] In an embodiment, Figure 1 As shown, the first bypass branch 71 and the first parallel pipe section 73 are arranged between the liquid storage device 60 and the outdoor throttling device 21. Therefore, the refrigerant in the liquid storage device 60 can choose any one of the first bypass branch 71 and the first parallel pipe section 73 to transport the refrigerant in the direction of the outdoor throttling device 21, so that the outdoor throttling device 21 can be used to throttle the refrigerant from the liquid storage device 60.

[0084] In some other embodiments, the first boost bypass assembly further includes a first one-way valve 75, which is disposed on the first bypass branch 71, and the conduction direction of the first one-way valve 75 is configured to be pumped from the liquid storage device 60 to the outdoor heat exchanger 20. Therefore, in this embodiment, the first bypass branch 71 has a single flow direction, that is, it can only be used to transport refrigerant from the liquid storage device 60 to the outdoor heat exchanger 20.

[0085] Embodiment (two)

[0086] For a single cooling type air conditioner, or for a cooling / heating dual-function air conditioner that only requires boost pumping of refrigerant in cooling mode, the boost bypass component includes a second boost bypass component, which is arranged between the indoor heat exchanger 30 and the liquid storage device 60, so as to realize the refrigerant boost pumping operation from the liquid storage device 60 to the indoor heat exchanger 30.

[0087] Similar to the first boost bypass assembly described above, Figure 2 As shown, the second boost bypass assembly includes a first bypass branch 71 and a second boost pump 82. One end of the second bypass branch 81 is connected to the liquid storage device 60, and the other end is connected to the refrigerant pipeline between the liquid storage device 60 and the indoor heat exchanger 30; the second boost pump 82 is arranged on the second bypass branch 81. Here, the specific arrangement of the second boost bypass assembly can refer to the above embodiment, and will not be repeated here.

[0088] In this embodiment, the second booster pump 82 has at least a second enabled state and a second disabled state. In the second enabled state, the second booster pump 82 operates, the second bypass branch 81 is in a conducting state, and the refrigerant can be pumped from the liquid storage device 60 to the indoor heat exchanger 30 side. Figure 2a In the second deactivated state, the second booster pump 82 is not running, the second bypass branch 81 is in a blocked state, at which time the refrigerant cannot flow through the second bypass branch 81 to the indoor heat exchanger 30 side, such as Figure 2b shown.

[0089] Optionally, the second enabled state corresponds to the refrigerant circulation return of the refrigerant heat exchange module being in a cooling flow state, such as the single cooling type air conditioner in the previous text is in the on operation state, or the cooling / heating dual-function air conditioner in the previous text is switched to the cooling mode operation state.

[0090] And, in some optional embodiments, such as Figure 2As shown, the refrigerant circulation loop has a second parallel pipe section 83 connected in series between the liquid storage device 60 and the indoor heat exchanger 30, and the two ends of the second bypass branch 81 are respectively connected in parallel with the two ends of the second parallel pipe section 83; at the same time, the second boost bypass assembly also includes a second control valve 84, which is arranged on the second parallel pipe section 83. Here, the specific arrangement of the second parallel pipe section 83 and the second control valve 84 can refer to the previous embodiment, and will not be repeated here.

[0091] Similarly, when the second booster pump 82 is in the second enabled state, the second control valve 84 is in the closed state. At this time, the refrigerant in the liquid storage device 60 is only transported to the indoor heat exchanger 30 through the second bypass branch 81, and the second parallel pipe section 83 is in the blocked state. Figure 2a And, when the second boost pump 82 is in the second deactivated state, the second control valve 84 is in the open state, as shown in FIG. Figure 2b As shown, at this time, the refrigerant can flow between the liquid storage device 60 and the indoor heat exchanger 30 through the second parallel pipe section 83. For example, for a cooling / heating dual-function air conditioner type, when it is switched to the heating mode, the second booster pump 82 is in the second disabled state, and the second control valve 84 is in the open state, so that the refrigerant can flow from the indoor heat exchanger 30 to the liquid storage device 60 side through the second parallel pipe section 83.

[0092] At the same time, the refrigerant heat exchange module also includes an indoor throttling member 31, which is arranged on the side of the indoor heat exchanger 30, specifically, the refrigerant circulation loop is on the liquid inlet side of the indoor heat exchanger 30 flowing downward from the refrigeration flow, and the indoor throttling member 31 can be used to throttle the refrigerant flowing through it. In this optional embodiment, the second bypass branch 81 and the second parallel pipe section 83 are arranged between the liquid storage device 60 and the indoor throttling member 31. Here, the specific arrangement of the indoor throttling member 31 can refer to the previous embodiment, and will not be repeated here.

[0093] Furthermore, the first boost bypass assembly further includes a second one-way valve 85, which is disposed on the second bypass branch 81, and the conduction direction of the second one-way valve 85 is configured to be pumped from the liquid storage device 60 to the indoor heat exchanger 30. Here, the specific arrangement of the second one-way valve 85 can refer to the above embodiment, and will not be described in detail here.

[0094] Embodiment (three)

[0095] For a cooling / heating dual-function air conditioner where both cooling and heating modes may require boosting and pumping refrigerant, the boosting bypass component includes a first boosting bypass component and a second boosting bypass component. The first boosting bypass component is disposed between the outdoor heat exchanger 20 and the liquid storage device 60 to realize the function of boosting and pumping refrigerant to the outdoor heat exchanger 20 in the heating mode; and the second boosting bypass component is disposed between the indoor heat exchanger 30 and the liquid storage device 60 to realize the function of boosting and pumping refrigerant to the indoor heat exchanger 30 in the cooling mode.

[0096] Referring to the above-mentioned embodiment (I) and embodiment (II), the specific component composition and arrangement of the first supercharging bypass assembly and the second supercharging bypass assembly are similar, such as Figure 3 No further description is given here.

[0097] In some optional embodiments, the specific working methods of the first boost bypass component and the second boost bypass component are as follows:

[0098] like Figure 3a As shown, when the air conditioning system is in the heating mode, the first booster pump 72 is in the first enabled state, the first control valve 74 is in the closed state, and the second booster pump 82 is in the second disabled state, and the second control valve 84 is in the open state. At this time, in the heating flow direction defined by the heating mode, the refrigerant flow sequence is "compressor 10→indoor heat exchanger 30→second parallel pipe section 83 (second control valve 84)→liquid storage tank→first bypass branch 71 (first booster pump 72)→outdoor heat exchanger 20→compressor 10".

[0099] In this way, by using the first booster pump 72 and the first bypass branch 71, part of the refrigerant in the liquid storage tank can be input into the refrigerant circulation loop, and the flow rate, flow rate and pressure of the mixed refrigerant delivered to the outdoor heat exchanger 20 side can be increased, thereby enhancing the heating effect of the air-conditioning system.

[0100] And, if Figure 3b As shown, when the air conditioning system is in the cooling mode, the second booster pump 82 is in the second enabled state, the second control valve 84 is in the closed state, and the first booster pump 72 is in the first disabled state, and the first control valve 74 is in the open state. At this time, in the cooling flow direction defined by the cooling mode, the refrigerant flow sequence is "compressor 10→outdoor heat exchanger 20→first parallel pipe section 73 (first control valve 74)→liquid storage tank→second bypass branch 81 (second booster pump 82)→indoor heat exchanger 30→compressor 10".

[0101] In this way, by using the second booster pump 82 and the second bypass branch 81, part of the refrigerant in the liquid storage tank can be input into the refrigerant circulation loop, and the flow rate, flow rate and pressure of the mixed refrigerant delivered to the indoor heat exchanger 30 side can be increased, thereby enhancing the cooling effect of the air-conditioning system.

[0102] Further optionally, the first boost bypass component and the second boost bypass component can also be started and stopped according to the workload. Here, the workload-related parameters include but are not limited to the number of indoor units enabled, the floor height of the enabled indoor units, the piping distance between the enabled indoor units and the outdoor units, etc.

[0103] Exemplarily, taking the air conditioning system being in cooling mode as an example, the air conditioning system is also preset with a judgment condition, which is that the number of activated indoor units is ≥X.

[0104] When the above judgment conditions are met, the second booster pump 82 is in the second enabled state, the second control valve 84 is in the closed state, and the first booster pump 72 is in the first disabled state, and the first control valve 74 is in the open state. When the above judgment conditions are met, the number of indoor units enabled in the air-conditioning system is large, and the air-conditioning workload is high. The second boost bypass component can increase the circulation flow rate and pressure of the refrigerant, thereby adapting to the current high workload.

[0105] When the above judgment conditions are not met, the first boost pump 72 is in the first disabled state, the second boost pump 82 is in the second disabled state, the first control valve 74 is in the open state, and the second control valve 84 is in the open state. At this time, in the refrigeration flow direction defined by the refrigeration mode, the refrigerant flow sequence is "compressor 10→outdoor heat exchanger 20→first parallel pipe section 73 (first control valve 74)→liquid storage tank→second parallel pipe section 83 (second control valve 84)→indoor heat exchanger 30→compressor 10". Here, when the above judgment conditions are not met, the number of indoor units enabled by the air-conditioning system is small, the air-conditioning workload is low, and the current circulating refrigerant volume in the circulation loop can meet the heat exchange demand, so there is no need to use the boost bypass component to increase the refrigerant circulation volume, flow rate and pressure.

[0106] As another example, also taking the air-conditioning system being in cooling mode as an example, the air-conditioning system is also preset with another judgment condition, which is that the vertical height difference between the currently enabled indoor unit and the outdoor unit is ≥Y meters.

[0107] If the above judgment conditions are met, the second boost pump 82 is in the second enabled state, the second control valve 84 is in the closed state, and the first boost pump 72 is in the first disabled state, and the first control valve 74 is in the open state. Similar to the previous example, when the vertical height difference between the indoor and outdoor units is large, the load of the air conditioning system transporting the refrigerant is high, so this example enables the second boost bypass component to adapt to the current load condition.

[0108] And when the above judgment conditions are not met, the first boost pump 72 is in the first disabled state, the second boost pump 82 is in the second disabled state, and the first control valve 74 is in the open state, the second control valve 84 is in the open state, such as Figure 3c At this time, the cooling flow direction defined by the cooling mode is basically the same as the flow direction in the previous example, and will not be described in detail here.

[0109] It should be understood that those skilled in the art may also choose to enable the boost bypass component according to actual working conditions and in other situations that may cause insufficient refrigerant flow, too low flow rate, too low pressure, etc. in the refrigerant circulation loop, so as to improve the refrigerant circulation of the air-conditioning system and increase the operating efficiency of the entire air-conditioning system.

[0110] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An air conditioning system, characterized in that: include: A refrigerant heat exchange module, which includes a compressor, an outdoor heat exchanger and an indoor heat exchanger, and is connected by a refrigerant pipeline to form a refrigerant circulation loop; A liquid storage device, connected in series to the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, used to recover and store excess refrigerant from the refrigerant circulation loop, and / or release refrigerant to the refrigerant circulation loop; The boost bypass component includes a boost pump and a bypass branch; one end of the bypass branch is connected to a liquid storage device, and the other end is connected to a refrigerant pipeline on the outdoor heat exchanger / indoor heat exchanger side. The boost pump is arranged on the bypass branch, and is configured to controllably pump the refrigerant in the liquid storage device to the outdoor heat exchanger / indoor heat exchanger side.

2. The air conditioning system according to claim 1, characterized in that: The supercharging bypass assembly includes a first supercharging bypass assembly, and the first supercharging bypass assembly includes: A first bypass branch, one end of which is connected to the liquid storage device, and the other end of which is connected to the refrigerant pipeline between the liquid storage device and the outdoor heat exchanger; The first booster pump is disposed on the first bypass branch and is configured to have at least a first activation state for pumping the refrigerant from the liquid storage device to the outdoor heat exchanger side when the refrigerant circulation loop is in a heating flow direction.

3. The air conditioning system according to claim 2, characterized in that: The refrigerant circulation loop has a first parallel pipe section connected in series between the liquid storage device and the outdoor heat exchanger, and two ends of the first bypass branch are respectively connected in parallel with two ends of the first parallel pipe section; The first boost bypass assembly further includes a first control valve disposed on the first parallel pipe section and configured to be in a closed state at least when the first boost pump is in a first enabled state.

4. The air conditioning system according to claim 3, characterized in that: The refrigerant heat exchange module also includes an outdoor throttling element, which is arranged on the outdoor heat exchanger side; The first bypass branch and the first parallel pipe section are arranged between the liquid storage device and the outdoor throttling element.

5. The air conditioning system according to claim 2, characterized in that: The first boost bypass assembly also includes a first one-way valve disposed on the first bypass branch, and the conduction direction of the first one-way valve is configured to be from the liquid storage device pump to the outdoor heat exchanger side.

6. The air conditioning system according to claim 1 or 2, characterized in that: The supercharging bypass assembly includes a second supercharging bypass assembly, and the second supercharging bypass assembly includes: A second bypass branch, one end of which is connected to the liquid storage device, and the other end of which is connected to the refrigerant pipeline between the liquid storage device and the indoor heat exchanger; The second booster pump is disposed on the second bypass branch and is configured to have at least a second activation state for pumping the refrigerant from the liquid storage device to the indoor heat exchanger side when the refrigerant circulation loop is in a cooling flow direction.

7. The air conditioning system according to claim 6, characterized in that: The refrigerant circulation loop has a second parallel pipe section connected in series between the liquid storage device and the indoor heat exchanger, and two ends of the second bypass branch are respectively connected in parallel with two ends of the second parallel pipe section; The second boost bypass assembly further includes a second control valve disposed on the second parallel pipe section and configured to be in a closed state at least when the second boost pump is in a second enabled state.

8. The air conditioning system according to claim 7, characterized in that: The refrigerant heat exchange module also includes an indoor throttling element, which is arranged on the indoor heat exchanger side; The second bypass branch and the second parallel pipe section are arranged between the liquid storage device and the indoor throttling element.

9. The air conditioning system according to claim 6, characterized in that: The first boost bypass assembly also includes a second one-way valve disposed on the second bypass branch, and the conduction direction of the second one-way valve is configured to be from the liquid storage device pump to the indoor heat exchanger side.

10. The air conditioning system according to claim 1, characterized in that: The type of air conditioning system is multi-split air conditioning.

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