Combined multi-way valve and air conditioning system

Abstract

The invention relates to the technical field of air conditioners, in particular to a combined multi-way valve and an air conditioning system. The combined multi-way valve comprises a pilot valve, a first main valve, a first connecting pipe and at least one second main valve, the first main valve comprises a first valve body and a first sliding block assembly, and the first valve body is provided with a first valve cavity and a D valve port. The second main valve comprises a second valve body and a second sliding block assembly, and the second valve body is provided with a second valve cavity. The first connecting pipe is connected with the first valve body and the second valve body, one end of the first connecting pipe communicates with the D valve port through the first valve cavity, and the other end communicates with the second valve cavity. The pilot valve communicates with the first valve cavity and the second valve cavity and is used for driving the first sliding block assembly and the second sliding block assembly to synchronously reverse to the second preset position from the first preset position or synchronously reverse to the first preset position from the second preset position. According to the combined multi-way valve and the air conditioning system, the problem that the cost of a multi-split air conditioning system is too high due to the design of an existing reversing valve is solved.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to a combined multi-way valve and an air conditioning system. Background Art

[0002] Multi-split central air conditioning is a type of household central air conditioning, commonly known as "one to many", which means that one outdoor unit drives two or more indoor units to operate. It has the advantages of low operating costs, reliable operation, good unit adaptability and high design freedom.

[0003] In the related art, multiple reversing valves are often installed within an air conditioning system to achieve the goal of having one outdoor unit drive two or more indoor units. However, the installation of multiple reversing valves significantly increases the complexity of air conditioning piping connections and flow path design, thereby increasing the design cost of the air conditioning system. If only one reversing valve is installed, the fluids of multiple indoor units must all flow through the same low-pressure flow channel within the reversing valve. However, the fluid velocity in the low-pressure flow channel is slow. To ensure the fluid flow rate and improve heat exchange efficiency, the low-pressure flow channel needs to be enlarged, which will lead to an increase in the overall volume of the reversing valve, which also increases the design cost. Summary of the Invention

[0004] Based on this, it is necessary to provide a combined multi-way valve and air-conditioning system to solve the problem that the existing reversing valve design leads to excessively high costs of multi-split air-conditioning systems.

[0005] The present application provides a combined multi-way valve, which includes a pilot valve, a first main valve, a first connecting pipe and at least one second main valve, the first main valve including a first valve body and a first slider assembly, the first valve body defining a first valve cavity, a D valve port, an E1 valve port, an S1 valve port and a C valve port, the D valve port being communicated with the first valve cavity, the E1 valve port, the S1 valve port and the C valve port being arranged side by side and all being communicated with the first valve cavity, the first slider assembly being slidably disposed in the first valve cavity; each second main valve includes a second valve body and a second slider assembly, the second valve body defining a second valve cavity, an E2 valve port and an S2 valve port, the E2 valve port and the S2 valve port being arranged side by side and all being communicated with the second valve cavity, the second slider assembly being slidably disposed in the second valve cavity; the first connecting pipe is respectively connected to the first valve body and the second valve body, and one end of the first connecting pipe is communicated with the D valve port through the first valve cavity, and the other end is communicated with the D valve port through the other end. One end is connected to the second valve cavity; the pilot valve is connected to the first valve cavity and the second valve cavity respectively, and is used to drive the first slider assembly and the second slider assembly to synchronously switch from the first preset position to the second preset position, or from the second preset position to the first preset position respectively; when the first slider assembly and the second slider assembly move to the first preset position, the E1 valve port is connected to the S1 valve port through the first slider assembly, the D valve port is connected to the C valve port through the first valve cavity, and the E2 valve port is connected to the S2 valve port through the second slider assembly; when the first slider assembly and the second slider assembly move to the second preset position, the C valve port is connected to the S1 valve port through the first slider assembly, the D valve port is connected to the E1 valve port through the first valve cavity, and the second slider assembly blocks the pipe opening of the S2 valve port, and enables the E2 valve port to connect to the first connecting pipe through the second valve cavity.

[0006] In one embodiment, there are multiple second main valves, and the combined multi-way valve further includes at least one second connecting pipe, which is provided between two adjacent second main valves and connects two adjacent second valve chambers.

[0007] In one embodiment, the plane where the axis of the first valve body and the axis of the D valve port are located is defined as a reference plane, and the plurality of second valve bodies are arranged in sequence along a direction perpendicular to the reference plane.

[0008] In one embodiment, the combined multi-way valve further includes a connecting bracket, which is arranged between the first valve body and the adjacent second valve body and connects the first valve body and the adjacent second valve body respectively; and / or, the connecting bracket is arranged between two adjacent second valve bodies and connects two adjacent second valve bodies.

[0009] In one embodiment, the two ends of the first slider assembly are movably sealedly connected to the inner walls of the two ends of the first valve cavity, and a first pressure chamber and a second pressure chamber are formed at the two ends of the first valve cavity respectively; the two ends of the second slider assembly are movably sealedly connected to the inner walls of the two ends of the second valve cavity, and a third pressure chamber and a fourth pressure chamber are formed at the two ends of the second valve cavity respectively; wherein, the pilot valve is connected to the first pressure chamber and is connected to the third pressure chamber through the first pressure chamber, and the pilot valve is connected to the second pressure chamber and is connected to the fourth pressure chamber through the second pressure chamber.

[0010] In one embodiment, there are multiple second main valves, and the third pressure chambers on adjacent second main valves are connected in sequence, and the fourth pressure chambers on adjacent second main valves are connected in sequence.

[0011] In one embodiment, the first connecting pipe includes a first branch pipe and a second branch pipe, one end of the first branch pipe is connected to the first valve body, and the other end is connected to the second branch pipe and connected to the second valve body through the second branch pipe.

[0012] In one embodiment, the first branch pipe and the second branch pipe are both L-shaped.

[0013] In one embodiment, the combined multi-way valve further includes a fixed bracket, one end of which is connected to the pilot valve, and the other end of which is connected to the peripheral side of the first main valve.

[0014] The present application also provides an air-conditioning system, which includes a compressor, an outdoor heat exchanger, at least two indoor heat exchangers and the combined multi-way valve described in any one of the above embodiments, wherein the D valve port is connected to the outlet of the compressor, the S1 valve port and each of the S2 valve ports are connected to the inlet of the compressor; the outdoor heat exchanger is connected to each of the indoor heat exchangers, and the C valve port is connected to the outdoor heat exchanger, the E1 valve port is connected to one of the indoor heat exchangers, and each of the E2 valve ports is connected to a corresponding one of the indoor heat exchangers.

[0015] Compared with the prior art, the combined multi-way valve and air-conditioning system provided by the present application, by providing a first main valve and at least one second main valve, can realize that an outdoor heat exchanger drives one or more indoor heat exchangers to operate synchronously, thereby reducing the space occupied by the outdoor heat exchanger and improving space utilization. The first main valve and the second main valve are connected through a first connecting pipe, which not only ensures the smooth circulation of the refrigerant in the first valve cavity and the second valve cavity, but also has a simple structure of the first connecting pipe, which can effectively reduce the processing difficulty and processing cost of the pipeline. Furthermore, the combined multi-way valve has multiple low-pressure flow paths arranged in parallel in the cooling mode, and multiple high-pressure flow paths arranged in parallel in the heating mode. Therefore, in both cooling and heating modes, it can effectively increase the refrigerant flow rate flowing through the indoor heat exchanger, thereby greatly improving the efficiency of heat exchange. In this way, there is no need to increase the flow rate of the low-pressure refrigerant by increasing the volume of the combined multi-way valve, thereby effectively reducing the design cost of the combined multi-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a combined multi-way valve according to an embodiment of the present application;

[0018] Figure 2 This is a flow path diagram of a combined multi-way valve in cooling mode according to an embodiment of the present application;

[0019] Figure 3 A schematic diagram of an air-conditioning system (with two indoor heat exchangers) in cooling mode according to an embodiment of the present application;

[0020] Figure 4 A schematic diagram of an air-conditioning system (with three indoor heat exchangers) in cooling mode according to an embodiment of the present application;

[0021] Figure 5 This is a flow path diagram of a combined multi-way valve in heating mode according to an embodiment of the present application;

[0022] Figure 6 A schematic diagram of an air-conditioning system (with two indoor heat exchangers) in heating mode according to an embodiment of the present application;

[0023] Figure 7A schematic diagram of an air-conditioning system (with three indoor heat exchangers) in heating mode according to an embodiment of the present application;

[0024] Figure 8 A top view of a combined multi-way valve according to an embodiment of the present application.

[0025] The symbols in the figure mean the following:

[0026] 100. Combined multi-way valve; 10. Pilot valve; 20. First main valve; 21. First valve body; 211. First valve chamber; 2111. First pressure chamber; 2112. Second pressure chamber; 212. Valve port D; 213. Valve port E1; 214. Valve port S1; 215. Valve port C; 22. First slider assembly; 30. Second main valve; 31. Second valve body; 311. Second valve chamber; 3111. Third pressure chamber; 3112. Fourth pressure chamber; 312. Valve port E2; 313. Valve port S2; 32. Second slider assembly; 40. First connecting pipe; 41. First branch pipe; 42. Second branch pipe; 50. Connecting bracket; 60. Fixing bracket; 70. Capillary tube; 200. Compressor; 300. Outdoor heat exchanger; 400. Indoor heat exchanger. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0030] In this application, unless otherwise expressly specified or limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, a first feature being “above,” “above,” or “above” a 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. A first feature being “below,” “below,” or “below” a 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.

[0031] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0032] Multi-split central air conditioning is a type of household central air conditioning, commonly known as "one to many", which means that one outdoor unit drives two or more indoor units to operate. It has the advantages of low operating costs, reliable operation, good unit adaptability and high design freedom.

[0033] In the related art, multiple reversing valves are often installed within an air conditioning system to achieve the goal of having one outdoor unit drive two or more indoor units. However, the installation of multiple reversing valves significantly increases the complexity of air conditioning piping connections and flow path design, thereby increasing the design cost of the air conditioning system. If only one reversing valve is installed, the fluids of multiple indoor units must all flow through the same low-pressure flow channel within the reversing valve. However, the fluid velocity in the low-pressure flow channel is slow. To ensure the fluid flow rate and improve heat exchange efficiency, the low-pressure flow channel needs to be enlarged, which will lead to an increase in the overall volume of the reversing valve, which also increases the design cost.

[0034] See also Figures 1-8 To address the high cost of multi-split air conditioning systems caused by existing reversing valve designs, the present application provides a combined multi-way valve 100 and an air conditioning system having the same. The air conditioning system further includes a compressor 200, an outdoor heat exchanger 300, and at least two indoor heat exchangers 400. Both the outdoor heat exchanger 300 and the indoor heat exchanger 400 are connected to the compressor 200 via the combined multi-way valve 100.

[0035] It should be noted that the air conditioning system generally has cooling and heating modes. In the cooling mode, the outdoor heat exchanger 300 is used as a condenser, and the indoor heat exchanger 400 is used as an evaporator. The indoor heat exchanger 400 of the present application can be set to two, three, four or more, and driven by the same outdoor heat exchanger 300 to reduce the space occupied by the outdoor heat exchanger 300. When the air conditioning system is running, one indoor heat exchanger 400 can be started separately, or multiple indoor heat exchangers 400 can be started at the same time, which is more convenient and energy-saving. In the heating mode, the outdoor heat exchanger 300 is used as an evaporator, and the indoor heat exchanger 400 is used as a condenser. Its operation is the same as the cooling mode, and no further details will be given here.

[0036] See also Figure 1 、 Figure 2 and Figure 5 The combined multi-way valve 100 provided in this application includes a pilot valve 10, a first main valve 20, a first connecting pipe 40, and at least one second main valve 30. It will be appreciated that the total number of first and second main valves 20, 30 is the same as the total number of indoor heat exchangers 400 and is provided in a one-to-one correspondence. That is, each first main valve 20 and each second main valve 30 can control a corresponding indoor heat exchanger 400.

[0037] Specifically, the first main valve 20 includes a first valve body 21 and a first slider assembly 22. The first valve body 21 is provided with a first valve cavity 211, a D valve port 212, an E1 valve port 213, an S1 valve port 214 and a C valve port 215. The D valve port 212 is arranged on one side of the first valve body 21 along its own radial direction and is connected to the first valve cavity 211. The E1 valve port 213, the S1 valve port 214 and the C valve port 215 are arranged side by side on the side of the first valve body 21 away from the D valve port 212 and are all connected to the first valve cavity 211. The first slider assembly 22 is slidably arranged in the first valve cavity 211. Each second main valve 30 includes a second valve body 31 and a second slider assembly 32. The second valve body 31 defines a second valve cavity 311, an E2 valve port 312, and an S2 valve port 313. The E2 valve port 312 and the S2 valve port 313 are arranged side by side on one radial side of the second valve body 31 and are both connected to the second valve cavity 311. The second slider assembly 32 is slidably disposed within the second valve cavity 311. A first connecting pipe 40 connects the first valve body 21 and the second valve body 31, respectively. One end of the first connecting pipe 40 is connected to the D valve port 212 through the first valve cavity 211, and the other end is connected to the second valve cavity 311.

[0038] Furthermore, the pilot valve 10 communicates with the first valve chamber 211 and the second valve chamber 311, respectively, for driving the first slider assembly 22 and the second slider assembly 32 to synchronously shift from the first preset position to the second preset position, or vice versa. When the first slider assembly 22 and the second slider assembly 32 move to the first preset position, the E1 valve port 213 communicates with the S1 valve port 214 via the first slider assembly 22, the D valve port 212 communicates with the C valve port 215 via the first valve chamber 211, and the E2 valve port 312 communicates with the S2 valve port 313 via the second slider assembly 32. When the first slider assembly 22 and the second slider assembly 32 move to the second preset position, the C valve port 215 is connected to the S1 valve port 214 through the first slider assembly 22, the D valve port 212 is connected to the E1 valve port 213 through the first valve cavity 211, and the second slider assembly 32 blocks the pipe opening of the S2 valve port 313, and makes the E2 valve port 312 connected to the first connecting pipe 40 through the second valve cavity 311.

[0039] It should be noted that the first preset position is the position of the first slider assembly 22 and the second slider assembly 32 in the first valve cavity 211 and the second valve cavity 311 respectively when the combination multi-way valve 100 is in the cooling state, and the second preset position is the position of the first slider assembly 22 and the second slider assembly 32 in the first valve cavity 211 and the second valve cavity 311 respectively when the combination multi-way valve 100 is in the heating state.

[0040] Specifically, the pilot valve 10 drives the movement of the first and second slider assemblies 22 and 32 by changing the pressure differential across the first and second slider assemblies 22 and 32, thereby causing the first and second slider assemblies 22 and 32 to move to a first predetermined position or a second predetermined position. For example, the first slider assembly 22 is movably and sealedly connected to the inner walls of the first valve chamber 211 at both ends, forming a first pressure chamber 2111 and a second pressure chamber 2112 at both ends of the first valve chamber 211, respectively. The first pressure chamber 2111 is connected to the high-pressure outlet of the pilot valve 10, and the second pressure chamber 2112 is connected to the low-pressure inlet of the pilot valve 10. At this time, the pressure in the first pressure chamber 2111 is greater than the pressure in the second pressure chamber 2112, and the first slider assembly 22 moves toward the second pressure chamber 2112 under the action of the pressure differential. Furthermore, the pilot valve 10 can switch between the high-pressure outlet and the low-pressure inlet, thereby making the pressure in the first pressure chamber 2111 lower than that in the second pressure chamber 2112. At this time, the first slider assembly 22 moves toward the first pressure chamber 2111 under the action of the pressure differential, thereby switching the first slider assembly 22 between the first preset position and the second preset position. The same applies to the second slider assembly 32, and no further details will be given here.

[0041] It should also be noted that the D valve port 212 is connected to the outlet of the compressor 200, and the S1 valve port 214 and each S2 valve port 313 are connected to the inlet of the compressor 200. The outdoor heat exchanger 300 is connected to each indoor heat exchanger 400, and the C valve port 215 is connected to the outdoor heat exchanger 300. The E1 valve port 213 is connected to one of the indoor heat exchangers 400, and each E2 valve port 312 is connected to a corresponding indoor heat exchanger 400.

[0042] When the combined multi-way valve 100 is in the cooling state, Figure 2 and Figure 3 As shown, the first slider assembly 22 and the second slider assembly 32 are in the first preset position. The high-pressure gaseous refrigerant flowing out of the compressor 200 outlet sequentially passes through the high-pressure flow path formed by the D valve port 212, the first valve chamber 211, and the C valve port 215 and flows into the outdoor heat exchanger 300 (condenser). After absorbing cold and releasing heat in the outdoor heat exchanger 300, and after being throttled by the expansion valve, it becomes low-pressure liquid refrigerant and enters the corresponding indoor heat exchanger 400 (evaporator). Finally, it enters the compressor 200 through the corresponding first low-pressure flow path or second low-pressure flow path. The first low-pressure flow path includes the E1 valve port 213, the channel formed by the first slider assembly 22, and the S1 valve port 214, which are connected in sequence. The second low-pressure flow path includes the E2 valve port 312, the channel formed by the second slider assembly 32, and the S2 valve port 313, which are connected in sequence. The first and second low-pressure flow paths are arranged in parallel.

[0043] When the combined multi-way valve 100 is in the heating state, Figure 5 and Figure 6 As shown, the first slider assembly 22 and the second slider assembly 32 are in the second preset position. The high-pressure gaseous refrigerant flowing out of the compressor 200 outlet flows through the D valve port 212 into the first valve chamber 211, then flows through the first and second high-pressure flow paths into the corresponding indoor heat exchanger 400 (condenser). The first high-pressure flow path includes the E1 valve port 213, and the second high-pressure flow path includes the first connecting pipe 40, the second valve chamber 311, and the E2 valve port 312, which are sequentially connected. The first and second high-pressure flow paths are arranged in parallel. After absorbing cold and releasing heat in the indoor heat exchanger 400, the high-pressure gaseous refrigerant enters the same outdoor heat exchanger 300 (evaporator) through the expansion valve. After becoming low-pressure gaseous refrigerant, it enters the compressor 200 through the low-pressure flow path formed by the C valve port 215, the channel formed by the first slider assembly 22, and the S1 valve port 214.

[0044] In summary, the combined multi-way valve 100 of the present application, by providing a first main valve 20 and at least one second main valve 30, can enable one outdoor heat exchanger 300 to simultaneously drive the operation of one or more indoor heat exchangers 400, thereby reducing the space occupied by the outdoor heat exchanger 300 and improving space utilization. The first main valve 20 and the second main valve 30 are connected via the first connecting pipe 40, which not only ensures smooth circulation of refrigerant within the first valve chamber 211 and the second valve chamber 311, but also simplifies the structure of the first connecting pipe 40, effectively reducing the difficulty and cost of pipe manufacturing. Furthermore, the combined multi-way valve 100 has multiple low-pressure flow paths arranged in parallel in the cooling mode, and multiple high-pressure flow paths arranged in parallel in the heating mode. Therefore, the refrigerant flow rate flowing through the indoor heat exchanger 400 can be effectively increased in both cooling and heating modes, thereby greatly improving the efficiency of heat exchange. In this way, there is no need to increase the flow rate of the low-pressure refrigerant by increasing the volume of the combined multi-way valve 100, thereby effectively reducing the design cost of the combined multi-way valve 100.

[0045] It should be noted that the indoor heat exchanger 400 is the main body that plays a cooling or heating role, while the outdoor heat exchanger 300 has a smaller impact on the indoor environment. In addition, the main pipeline connecting the outdoor heat exchanger 300, such as the pipeline at the C valve port 215, the refrigerant flow rate flowing through the interior in the heating state is usually smaller than the refrigerant flow rate flowing through the interior in the cooling state. Therefore, there is no need to increase the flow area of ​​the pipeline at the C valve port 215 (which serves as a low-pressure flow path at this time) in the heating state.

[0046] In one embodiment, if Figure 1 and Figure 8 As shown, the first connecting pipe 40 includes a first branch pipe 41 and a second branch pipe 42. One end of the first branch pipe 41 is connected to the first valve body 21, and the other end is connected to the second branch pipe 42. The second branch pipe 42 is then connected to the second valve body 31. By configuring the first connecting pipe 40 as a split structure of the first branch pipe 41 and the second branch pipe 42, the processing difficulty of the first branch pipe 41 and the second branch pipe 42 can be reduced, thereby saving processing costs.

[0047] Furthermore, in one embodiment, the first branch pipe 41 and the second branch pipe 42 are both L-shaped. This simplifies the structure of the first branch pipe 41 and the second branch pipe 42 and helps reduce the difficulty of connecting the first branch pipe 41 and the second branch pipe 42, thereby further reducing the difficulty of forming the first connecting pipe 40.

[0048] Specifically, the first branch pipe 41 is inserted into the second branch pipe 42 and fixed to the second branch pipe 42 by welding.

[0049] In other embodiments, the first connecting pipe 40 may also be provided as an integrally formed structure, as long as it can play the same role of connecting the first valve cavity 211 and the second valve cavity 311 .

[0050] In one embodiment, if Figure 4 and Figure 7 As shown, there are multiple second main valves 30 , and the combined multi-way valve 100 further includes at least one second connecting pipe (not shown), which is arranged between two adjacent second main valves 30 and connects two adjacent second valve chambers 311 .

[0051] In this way, the refrigerant can be circulated between the plurality of second valve chambers 311, thereby further meeting the quantity arrangement requirement of the outdoor heat exchanger 300. The second connecting pipe can adopt the same structure as the first connecting pipe 40, thereby reducing production costs.

[0052] Furthermore, in one embodiment, the plane where the axis of the first valve body 21 and the axis of the D valve port 212 are located is defined as a reference plane, and the plurality of second valve bodies 31 are arranged in sequence along a direction perpendicular to the reference plane.

[0053] By arranging the plurality of second valve bodies 31 side by side, the installation space occupied by the combined multi-way valve 100 in the air-conditioning system can be reduced, thereby facilitating improved space utilization.

[0054] In one embodiment, if Figure 1 and Figure 8 As shown, the combined multi-way valve 100 further includes a connecting bracket 50, which is disposed between the first valve body 21 and the adjacent second valve body 31, and respectively connects the first valve body 21 and the adjacent second valve body 31. This allows the first valve body 21 and the second valve body 31 to be integrally connected, thereby improving the overall structural stability of the combined multi-way valve 100 and ensuring reliable installation of the combined multi-way valve 100 within the air conditioning system.

[0055] When there are multiple second main valves 30, the connecting bracket 50 may also be disposed between two adjacent second valve bodies 31 to connect the two adjacent second valve bodies 31. In this way, the structural stability of the combined multi-way valve 100 is further improved.

[0056] In one embodiment, if Figure 2 and Figure 5As shown, the two ends of the first slider assembly 22 are movably and sealedly connected to the inner walls of the first valve chamber 211, forming a first pressure chamber 2111 and a second pressure chamber 2112 at the two ends of the first valve chamber 211. The two ends of the second slider assembly 32 are movably and sealedly connected to the inner walls of the second valve chamber 311, forming a third pressure chamber 3111 and a fourth pressure chamber 3112 at the two ends of the second valve chamber 311. The pilot valve 10 is connected to the first pressure chamber 2111 and to the third pressure chamber 3111 via the first pressure chamber 2111. Furthermore, the pilot valve 10 is connected to the second pressure chamber 2112 and to the fourth pressure chamber 3112 via the second pressure chamber 2112.

[0057] In this way, synchronous control of the first main valve 20 and the second main valve 30 can be achieved through one pilot valve 10, reducing the number of pilot valves 10 and the difficulty of setting them, thereby effectively simplifying the drive structure and reducing costs.

[0058] Specifically, the pilot valve 10 and the first pressure chamber 2111 , the first pressure chamber 2111 and the third pressure chamber 3111 , the pilot valve 10 and the second pressure chamber 2112 , and the second pressure chamber 2112 and the fourth pressure chamber 3112 are all connected via the capillary 70 .

[0059] Likewise, when there are multiple second main valves 30 , the third pressure chambers 3111 on adjacent second main valves 30 are sequentially communicated with each other, and the fourth pressure chambers 3112 on adjacent second main valves 30 are sequentially communicated with each other.

[0060] That is, even if the number of the second main valves 30 increases, synchronous control of the plurality of second main valves 30 can be achieved by using only one pilot valve 10 , thereby meeting the heat exchange requirements of the plurality of indoor heat exchangers 400 .

[0061] It can be understood that adjacent third pressure chambers 3111 and adjacent fourth pressure chambers 3112 are connected through the capillary 70. Since the second valve body 31 is arranged in a direction perpendicular to the reference plane, the length of the capillary 70 can be greatly shortened and the neatness of the pipeline arrangement can be improved.

[0062] Of course, in other embodiments, the first main valve 20 and the second main valve 30 may be arranged at intervals along the axial direction according to actual needs, and no further limitations are imposed herein.

[0063] In one embodiment, if Figure 1 and Figure 8 As shown, the combined multi-way valve 100 further includes a fixing bracket 60, one end of which is connected to the pilot valve 10, and the other end is connected to the peripheral side of the first main valve 20. In this way, a firm connection between the pilot valve 10 and the first main valve 20 can be achieved.

[0064] Specifically, the pilot valve 10 is connected to a side of the first valve body 21 facing away from the second valve body 31. The fixing bracket 60 is fixed to the pilot valve 10 and the first valve body 21 by welding.

[0065] To sum up, when multiple indoor heat exchangers 400 are set in the air-conditioning system, it is only necessary to add a second main valve 30, a second connecting pipe and a corresponding capillary tube 70 corresponding to the increased number of indoor heat exchangers 400, which effectively simplifies the system structure and reduces the layout cost.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A combined multi-way valve, characterized in that: It comprises a pilot valve (10), a first main valve (20), a first connecting pipe (40) and at least one second main valve (30), The first main valve (20) comprises a first valve body (21) and a first slider assembly (22); the first valve body (21) is provided with a first valve cavity (211), a D valve port (212), an E1 valve port (213), an S1 valve port (214), and a C valve port (215); the D valve port (212) is communicated with the first valve cavity (211); the E1 valve port (213), the S1 valve port (214), and the C valve port (215) are arranged side by side and are all communicated with the first valve cavity (211); the first slider assembly (22) is slidably disposed in the first valve cavity (211); Each of the second main valves (30) comprises a second valve body (31) and a second slider assembly (32); the second valve body (31) is provided with a second valve cavity (311), an E2 valve port (312), and an S2 valve port (313); the E2 valve port (312) and the S2 valve port (313) are arranged side by side and are both in communication with the second valve cavity (311); the second slider assembly (32) is slidably disposed in the second valve cavity (311); The first connecting pipe (40) is respectively connected to the first valve body (21) and the second valve body (31), and one end of the first connecting pipe (40) is connected to the D valve port (212) through the first valve cavity (211), and the other end is connected to the second valve cavity (311); The pilot valve (10) is connected to the first valve chamber (211) and the second valve chamber (311), respectively, and is used to drive the first slider assembly (22) and the second slider assembly (32) to synchronously switch from the first preset position to the second preset position, or to synchronously switch from the second preset position to the first preset position; When the first slider assembly (22) and the second slider assembly (32) are moved to the first preset position, the E1 valve port (213) is connected to the S1 valve port (214) through the first slider assembly (22), the D valve port (212) is connected to the C valve port (215) through the first valve cavity (211), and the E2 valve port (312) is connected to the S2 valve port (313) through the second slider assembly (32); When the first slider assembly (22) and the second slider assembly (32) are moved to the second preset position, the C valve port (215) is connected to the S1 valve port (214) through the first slider assembly (22), the D valve port (212) is connected to the E1 valve port (213) through the first valve cavity (211), and the second slider assembly (32) blocks the pipe opening of the S2 valve port (313) and enables the E2 valve port (312) to be connected to the first connecting pipe (40) through the second valve cavity (311).

2. The combined multi-way valve according to claim 1, characterized in that: There are multiple second main valves (30), and the combined multi-way valve further includes at least one second connecting pipe, which is arranged between two adjacent second main valves (30) and communicates with two adjacent second valve chambers (311).

3. The combined multi-way valve according to claim 2, characterized in that: The plane where the axis of the first valve body (21) and the axis of the D valve port (212) are located is defined as a reference plane, and the plurality of second valve bodies (31) are arranged in sequence along a direction perpendicular to the reference plane.

4. The combined multi-way valve according to claim 3, characterized in that: The combined multi-way valve further comprises a connecting bracket (50), wherein the connecting bracket (50) is provided between the first valve body (21) and the adjacent second valve body (31), and respectively connects the first valve body (21) and the adjacent second valve body (31); And / or, the connecting bracket (50) is provided between two adjacent second valve bodies (31) and connects the two adjacent second valve bodies (31).

5. The combined multi-way valve according to claim 1, characterized in that: The two ends of the first slider assembly (22) are movably sealedly connected to the inner walls of the two ends of the first valve cavity (211), and a first pressure cavity (2111) and a second pressure cavity (2112) are respectively formed at the two ends of the first valve cavity (211); The two ends of the second slider assembly (32) are movably sealedly connected to the inner walls of the two ends of the second valve cavity (311), and a third pressure cavity (3111) and a fourth pressure cavity (3112) are respectively formed at the two ends of the second valve cavity (311); The pilot valve (10) is connected to the first pressure chamber (2111) and is connected to the third pressure chamber (3111) through the first pressure chamber (2111), and the pilot valve (10) is connected to the second pressure chamber (2112) and is connected to the fourth pressure chamber (3112) through the second pressure chamber (2112).

6. The combined multi-way valve according to claim 5, characterized in that: There are multiple second main valves (30), and the third pressure chambers (3111) on adjacent second main valves (30) are connected in sequence, and the fourth pressure chambers (3112) on adjacent second main valves (30) are connected in sequence.

7. The combined multi-way valve according to claim 1, characterized in that: The first connecting pipe (40) comprises a first branch pipe (41) and a second branch pipe (42); one end of the first branch pipe (41) is connected to the first valve body (21), and the other end is connected to the second branch pipe (42) and connected to the second valve body (31) through the second branch pipe (42).

8. The combined multi-way valve according to claim 7, characterized in that: The first branch pipe (41) and the second branch pipe (42) are both L-shaped.

9. The combined multi-way valve according to claim 1, characterized in that: The combined multi-way valve further comprises a fixed bracket (60), one end of which is connected to the pilot valve (10), and the other end of which is connected to the peripheral side of the first main valve (20).

10. An air conditioning system, characterized in that: The invention comprises a compressor (200), an outdoor heat exchanger (300), at least two indoor heat exchangers (400), and a combined multi-way valve according to any one of claims 1 to 9, wherein the D valve port (212) is connected to the outlet of the compressor (200), and the S1 valve port (214) and each of the S2 valve ports (313) are connected to the inlet of the compressor (200); The outdoor heat exchanger (300) is connected to each of the indoor heat exchangers (400), and the C valve port (215) is connected to the outdoor heat exchanger (300), the E1 valve port (213) is connected to one of the indoor heat exchangers (400), and each of the E2 valve ports (312) is connected to a corresponding one of the indoor heat exchangers (400).

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