Refrigerant switching device and heating and ventilation system with same

Abstract

The utility model discloses a refrigerant switching device and a heating and ventilation system with the same. The refrigerant switching device is provided with a first direction and a second direction which are perpendicular to each other. The refrigerant switching device comprises a plurality of gas collecting pipes extending in the first direction, and the gas collecting pipes are arranged at intervals and comprise the first gas collecting pipe and the second gas collecting pipe which are different in pressure. The plurality of first branch gas pipes are communicated with the first gas collecting pipe and are provided with first gas valves; a plurality of second branch gas pipes are communicated with the second gas collecting pipe, and each second branch gas pipe is provided with a second gas valve; one first branch air pipe and one second branch air pipe are gathered to one collecting pipe, and the collecting pipe is communicated with an indoor unit and provided with a third air valve; the first gas valve, the second gas valve and the third gas valve are located on the same side of the first gas collecting pipe and the second gas collecting pipe in the second direction. The refrigerant switching device is small in size and compact in layout.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a refrigerant switching device and a heating and ventilation system having the same. Background Art

[0002] HVAC systems are commonly used air conditioning equipment, used to regulate indoor ambient temperature (some systems also have functions such as humidity control and purification). Related technologies often use a refrigerant switching device, which switches between cooling and heating modes. This device typically includes multiple parallel pipes and valves installed within them. Improper piping and valve placement can occupy significant space within the refrigerant switching device, resulting in an excessively large device. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a refrigerant switching device having the advantages of small size and compact layout.

[0004] In order to achieve the above-mentioned purpose, according to the first aspect embodiment of the present application, a refrigerant switching device is proposed, the refrigerant switching device has a first direction and a second direction, the first direction and the second direction are perpendicular to each other; the refrigerant switching device includes: a plurality of air manifolds, the air manifolds extend along the first direction, the plurality of air manifolds are arranged at intervals and include a first air manifold and a second air manifold, the pressure in the first air manifold is different from the pressure in the second air manifold; a plurality of first branch air pipes, connected to the first air manifold, the first branch air pipe is provided with a first air valve; a plurality of second branch air pipes, connected to the second air manifold, the second branch air pipe is provided with a second air valve; a plurality of manifolds, one first branch air pipe and one second branch air pipe are converged into one manifold, the manifold is connected to the indoor unit and is provided with a third air valve; wherein, the first air valve, the second air valve and the third air valve are located on the same side of the first air manifold and the second air manifold in the second direction.

[0005] The refrigerant switching device according to the embodiment of the present application has the advantages of small size and compact layout.

[0006] In some embodiments of the present application, the refrigerant switching device also has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; when observed along the third direction, two of the first air valve, the second air valve and the third air valve are located on a first vertical plane, and the remaining air valve is located on a second vertical plane, and the first vertical plane and the second vertical plane are perpendicular to the first direction and are spaced apart along the first direction.

[0007] In some embodiments of the present application, the refrigerant switching device also includes a three-way pipe, and the first air valve, the second air valve and the third air valve are connected to a common three-way pipe; the first air valve is located on the first vertical plane, and the second air valve and the third air valve are located on the second vertical plane; in the second direction, the second air valve is farther away from the first air manifold and the second air manifold than the third air valve, and the first air valve is farther away from the first air manifold and the second air manifold than the third air valve; the three-way pipe spans the first vertical plane and the second vertical plane.

[0008] In some embodiments of the present application, each of the first, second and third air valves includes a first connection portion and a second connection portion, the first connection portion extends in the second direction, and the second connection portion extends in the third direction; the first branch pipe extends along the second direction, connecting the first air manifold and the first connection portion of the first air valve; the second branch pipe extends along the second direction, connecting the second air manifold and the second connection portion of the second air valve; the three-way pipe includes a first pipe, a second pipe and a third pipe that are connected to each other, and the confluence of the first, second and third pipes is located on the first vertical plane, the first pipe extends along the third direction and is connected to the second connection portion of the first air valve, the second pipe extends along the second direction and extends from the first vertical plane to the second vertical plane, and is connected to the first connection portion of the second air valve on the second vertical plane, the third pipe extends along the second direction and extends from the first vertical plane to the second vertical plane, and is connected to the first connection portion of the third air valve on the second vertical plane; the manifold is located on the second vertical plane and is connected to the second connection portion of the third air valve.

[0009] In some embodiments of the present application, the first gas collecting pipe and the second gas collecting pipe are located on a third vertical plane, and the third vertical plane is perpendicular to the first vertical plane and the second vertical plane.

[0010] In some embodiments of the present application, on a plane perpendicular to the second direction, at least two of the orthographic projection of the first gas valve, the orthographic projection of the second gas valve, and the orthographic projection of the third gas valve have an overlapping area.

[0011] In some embodiments of the present application, the refrigerant switching device also has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the axis of the first air valve, the axis of the second air valve and the axis of the third air valve extend along the third direction; the first air valve, the second air valve and the third air valve are at the same horizontal height and on a first horizontal plane, and the first horizontal plane is perpendicular to the third direction.

[0012] In some embodiments of the present application, the central axis of the first gas collecting pipe is located on the second horizontal plane, the central axis of the second gas collecting pipe is located on the third horizontal plane, the first horizontal plane, the second horizontal plane and the third horizontal plane are parallel to each other and arranged at intervals; wherein, the second horizontal plane and the third horizontal plane are located on the same side of the first horizontal plane.

[0013] In some embodiments of the present application, the axis of the first air valve is located on a first vertical plane, the axis of the second air valve and the axis of the third air valve are located on a second vertical plane, and the first vertical plane and the second vertical plane are parallel to each other and arranged perpendicular to the first direction.

[0014] In some embodiments of the present application, the refrigerant switching device further includes: a three-way pipe, which is respectively connected to the first gas valve, the second gas valve and the third gas valve.

[0015] In some embodiments of the present application, in the second direction, the first gas valve is located between the second gas valve and the third gas valve.

[0016] In some embodiments of the present application, when observed along the third direction, there is a first distance between the axis of the first air valve and the axis of the second air valve in the second direction, and there is a second distance between the axis of the first air valve and the axis of the third air valve in the second direction, and the first distance is equal to the second distance.

[0017] In some embodiments of the present application, the three-way pipe includes: a first connecting section, connected to the second air valve and located on the second vertical plane; a second connecting section, connected to the first air valve and located on the first vertical plane; a third connecting section, connected to the third air valve and located on the second vertical plane; a first transition section, connected between the first connecting section and the second connecting section; and a second transition section, connected between the second connecting section and the third connecting section.

[0018] In some embodiments of the present application, the second connecting section is provided with an interface, which is connected to the first air valve; wherein, the central axis of the first transition section and the central axis of the second transition section are located on an inclined surface, and the angle between the central axis of the interface and the inclined surface is not less than 20° and not greater than 30°.

[0019] In some embodiments of the present application, the central axis of the first gas collecting pipe is located in the second horizontal plane, the central axis of the second gas collecting pipe is located in the third horizontal plane, the first horizontal plane, the second horizontal plane and the third horizontal plane are parallel to each other and arranged at intervals; the first branch air pipe is located in the second horizontal plane, and the second branch air pipe is located in the third horizontal plane; wherein, the second horizontal plane and the third horizontal plane are located on the same side of the first horizontal plane.

[0020] In some embodiments of the present application, the first connecting segment and the third connecting segment are located on the second horizontal plane; and the second connecting segment is located on the third horizontal plane.

[0021] In some embodiments of the present application, the third air valve is closer to the second air collection pipe than the second air valve; the second branch air pipe includes: a first extension section, which is connected to the second air valve and is located on the second vertical plane; a second extension section, one end of the second extension section is connected to the first extension section; a third extension section, which is connected to the second air collection pipe and is located on the first vertical plane, and the third connecting section is connected to the other end of the second extension section; wherein, the first extension section and the third air valve are spaced apart in the second direction.

[0022] In some embodiments of the present application, the central axis of the first gas collecting pipe is located on the second horizontal plane, the central axis of the second gas collecting pipe is located on the third horizontal plane, the first horizontal plane, the second horizontal plane and the third horizontal plane are arranged in parallel and spaced apart; the second horizontal plane is located between the first horizontal plane and the third horizontal plane.

[0023] In some embodiments of the present application, the manifold further includes: a first air outlet, one end of which is connected to the third air valve and extends away from the second air valve; a filter, one end of which is connected to the other end of the first air outlet and is located below the gas collecting pipe; and a second air outlet, which is connected to the other end of the filter and extends away from the second air valve.

[0024] In some embodiments of the present application, the central axis of the first air outlet, the central axis of the filter, and the central axis of the second air outlet are located in the second vertical plane.

[0025] In some embodiments of the present application, the inner diameter of the filter is larger than the inner diameter of the first air outlet; and / or the inner diameter of the filter is larger than the inner diameter of the second air outlet.

[0026] In some embodiments of the present application, the central axis of the first gas collecting pipe and the central axis of the second gas collecting pipe are located on a third vertical plane, and the third vertical plane is arranged perpendicular to the second direction.

[0027] In some embodiments of the present application, the refrigerant switching device also includes: a shell, the side panel of the shell is provided with a pipe opening, the first air valve, the second air valve, the third air valve, the first branch air pipe, the second branch air pipe and the gas collecting pipe are arranged in the shell, and the gas collecting pipe is passed through the pipe opening and extends out of the shell.

[0028] In some embodiments of the present application, a support rod, a vibration-damping pad and a crimping portion are provided in the shell. The support rod is located below one end of the three-way pipe connected to the second air valve, and is used to support the three-way pipe. The vibration-damping pad is located between the three-way pipe and the support rod. The crimping portion is connected to the support rod and pressed above the three-way pipe.

[0029] In some embodiments of the present application, the first gas manifold and the second gas manifold are respectively connected to fixing members to fix the relative positions of the first gas manifold and the second gas manifold.

[0030] According to the second aspect embodiment of the present application, a HVAC system is proposed, including an indoor unit and an outdoor unit; and a refrigerant switching device according to the first aspect embodiment of the present application, wherein the indoor unit is connected to the manifold, and the outdoor unit is connected to the gas collecting pipe.

[0031] According to the embodiment of the present invention, the HVAC system has the advantages of small size and compact layout by providing the above-mentioned refrigerant switching device.

[0032] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0034] Figure 1 This is one of the structural schematic diagrams of the refrigerant switching device according to an embodiment of the present application;

[0035] Figure 2 This is a second structural diagram of the refrigerant switching device according to an embodiment of the present application;

[0036] Figure 3 This is a third structural diagram of the refrigerant switching device according to an embodiment of the present application;

[0037] Figure 4 This is one of the structural schematic diagrams of the tee pipe according to an embodiment of the present application;

[0038] Figure 5 This is the second structural diagram of the tee pipe according to the embodiment of the present application;

[0039] Figure 6 This is the third structural diagram of the tee pipe according to the embodiment of the present application;

[0040] Figure 7 is a performance diagram of a refrigerant switching device according to an embodiment of the present application;

[0041] Figure 8 Schematic diagram of the coordination of the housing, liquid pipe, and gas manifold of the refrigerant switching device according to an embodiment of the present application;

[0042] Figure 9 Schematic diagram of the coordination of the side panels, liquid pipes, and gas manifolds of the refrigerant switching device according to an embodiment of the present application;

[0043] Figure 10 This is a fourth structural diagram of the refrigerant switching device according to an embodiment of the present application;

[0044] Figure 11 This is a fifth structural diagram of the refrigerant switching device according to an embodiment of the present application;

[0045] Figure 12 This is a sixth structural diagram of the refrigerant switching device according to an embodiment of the present application;

[0046] Figure 13 Schematic diagram of the coordination of the gas valve and the three-way pipe of the refrigerant switching device according to an embodiment of the present application;

[0047] Figure 14 is a structural perspective view of a refrigerant switching device according to an embodiment of the present application;

[0048] Figure 15 It is a structural diagram of a HVAC system according to an embodiment of the present application.

[0049] Reference numerals:

[0050] Refrigerant switching device 1; load unit 2; heat source unit 3; liquid pipe 4; shell 5; side panel 51; pipe port 52; HVAC system 6;

[0051] First gas collection pipe 100; first branch gas pipe 110;

[0052] Second gas collection pipe 200; second branch gas pipe 210; first extension section 211; second extension section 212; third extension section 213;

[0053] First air valve 300; second air valve 400; third air valve 500; first connecting portion 510; second connecting portion 520;

[0054] Tee pipe 600; first connecting section 610; first transition section 620; second connecting section 630; interface 631; second transition section 640; third connecting section 650;

[0055] Manifold 700; first air outlet 710; second air outlet 720; filter 730;

[0056] Vibration-damping pad 810; support rod 820; fixing member 830; crimping portion 940;

[0057] First horizontal plane H1; second horizontal plane H2; third horizontal plane H3; first vertical plane V1; second vertical plane V2; third vertical plane V3; inclined plane M. DETAILED DESCRIPTION

[0058] The embodiments of the present application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present application are described in detail below.

[0059] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] In the description of this application, “plurality” means two or more.

[0061] The HVAC system 6 according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0062] The HVAC system 6 may include a compressor, an indoor unit, an outdoor unit and a refrigerant switching device 1. The refrigerant switching device 1, the indoor unit, the outdoor unit and the compressor are connected to form a refrigerant circuit. The refrigerant switching device 1 can control the flow direction of the refrigerant in the refrigerant circuit so that the indoor unit can at least switch between cooling mode and heating mode.

[0063] First, the refrigerant switching device 1 according to an embodiment of the present application is described with reference to the accompanying drawings.

[0064] like Figure 1-Figure 3 、 Figure 14 As shown, the refrigerant switching device 1 according to an embodiment of the present application includes a plurality of gas headers, a plurality of first branch gas pipes 110 , a plurality of first branch gas pipes 210 and a plurality of confluence pipes 700 .

[0065] The refrigerant switching device 1 has a first direction (the direction indicated by arrow A in the figure) and a second direction (the direction indicated by arrow B in the figure), and the first direction and the second direction are perpendicular to each other.

[0066] The gas collection pipe extends along the first direction, and multiple gas collection pipes are arranged at intervals. The multiple gas collection pipes include a first gas collection pipe 100 and a second gas collection pipe 200, that is, the first gas collection pipe 100 and the second gas collection pipe 200 both extend along the first direction, and the first gas collection pipe 100 and the second gas collection pipe 200 are arranged at intervals. The pressure in the first gas collection pipe 100 and the pressure in the second gas collection pipe 200 are different. For example, the pressure in the first gas collection pipe 100 is greater than the pressure in the second gas collection pipe 200. At this time, the first gas collection pipe 100 is a high-pressure gas collection pipe and the second gas collection pipe 200 is a low-pressure gas collection pipe, or the pressure in the first gas collection pipe 100 is less than the pressure in the second gas collection pipe 200. At this time, the first gas collection pipe 100 is a low-pressure gas collection pipe and the second gas collection pipe 200 is a high-pressure gas collection pipe.

[0067] Multiple first branch air pipes 110 are connected to the first air manifold 100, each of which is equipped with a first air valve 300. Multiple first branch air pipes 210 are connected to the second air manifold 200, each of which is equipped with a second air valve 400. One first branch air pipe 110 and one second branch air pipe 210 converge into a manifold 700, each of which is equipped with a third air valve 500. The first, second, and third air valves 300, 400, and 500 are located on the same side of the manifolds (i.e., the first and second manifolds 100, 200) in the second direction.

[0068] Among them, one of the indoor unit and the outdoor unit is connected to the manifold 700, and the other of the indoor unit and the outdoor unit is connected to the gas manifold. For example, the indoor unit is connected to the manifold 700, and the outdoor unit is connected to the first gas manifold 100 and the second gas manifold 200, or the outdoor unit is connected to the manifold 700, and the indoor unit is connected to the first gas manifold 100 and the second gas manifold 200.

[0069] For example, the first air valve 300, the second air valve 400 and the third air valve 500 are arranged at intervals. In the first direction, at least two of the first air valve 300, the second air valve 400 and the third air valve 500 are staggered; in the second direction, the first air valve 300, the second air valve 400 and the third air valve 500 are arranged at intervals.

[0070] Compared with the existing technology in which the first air valve, the second air valve and the third air valve are arranged in a straight line extending along the second direction, that is, in the existing technology, the first air valve, the second air valve and the third air valve are arranged non-offset in the first direction, the refrigerant switching device 1 described in the present application can ensure that the first air valve 300, the second air valve 400 and the third air valve 500 do not interfere with each other. The distance between the first air valve 300, the second air valve 400 and the third air valve 500 in the second direction can be reduced accordingly, so that the layout of the first air valve 300, the second air valve 400 and the third air valve 500 is more compact, thereby reducing the volume of the refrigerant switching device 1.

[0071] Thus, the refrigerant switching device 1 according to the embodiment of the present invention has the advantages of small size and compact layout.

[0072] According to the embodiment of the present invention, the HVAC system 6 has the advantages of small size and compact layout by providing the above-mentioned refrigerant switching device 1 .

[0073] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the refrigerant switching device 1 further has a third direction (indicated by arrow C in the figure). The first, second, and third directions are perpendicular to each other. When viewed along the third direction, two of the first, second, and third valves 300, 400, and 500 are located on a first vertical plane V1, and the remaining valve is located on a second vertical plane V2. The first and second vertical planes V1 and V2 are perpendicular to the first direction and spaced apart along the first direction.

[0074] In this way, the overall size of the first air valve 300, the second air valve 400 and the third air valve 500 in the first direction is reduced, reducing the space occupied by the refrigerant switching device 1 in the first direction, so that the refrigerant switching device 1 takes into account the size in the first direction and the size in the second direction, avoiding the refrigerant switching device 1 being too large in a certain direction.

[0075] In some embodiments of the present application, Figure 2-Figure 6 As shown, the refrigerant switching device 1 further includes a three-way pipe 600. The first gas valve 300, the second gas valve 400 and the third gas valve 500 are connected to the three-way pipe 600. The three-way pipe 600 spans the first vertical plane V1 and the second vertical plane V2.

[0076] The first air valve 300 is located on a first vertical plane V1, and the second air valve 400 and the third air valve 500 are located on a second vertical plane V2. In the second direction, the second air valve 400 is farther from the first and second air manifolds 100 and 200 than the third air valve 500, and the first air valve 300 is farther from the first and second air manifolds 100 and 200 than the third air valve 500.

[0077] By providing the tee 600, both the first and second air valves 300 and 400 can be connected to the third air valve 500, eliminating the need for separate pipes between the first and third air valves 300 and 500, or between the second and third air valves 400 and 500. This reduces the number of pipes, facilitates assembly and disassembly, increases production efficiency, and saves space. Furthermore, in the second direction, the tee 600 is also located between the second and third air valves 400 and 500. The tee 600 can be constructed in a "U" shape, which facilitates its construction and provides increased structural strength.

[0078] Furthermore, if Figure 12 and Figure 13 As shown, each of the first gas valve 300 , the second gas valve 400 and the third gas valve 500 includes a first connecting portion 510 and a second connecting portion 520 , wherein the first connecting portion 510 extends in the second direction and the second connecting portion 520 extends in the third direction.

[0079] The first branch pipe 110 extends along the second direction and connects the first gas header 100 and the first connection portion 510 of the first gas valve 300. The second branch pipe 210 extends along the second direction and connects the second gas header 200 and the second connection portion 520 of the second gas valve 400.

[0080] The tee pipe 600 includes a first pipe, a second pipe, and a third pipe that are interconnected. The first, second, and third pipes converge at a first vertical plane V1. The first pipe extends along the third direction and is connected to the second connection portion 520 of the first air valve 300. The second pipe extends along the second direction and extends from the first vertical plane V1 to the second vertical plane V2, where it connects to the first connection portion 510 of the second air valve 400. The third pipe extends along the second direction and extends from the first vertical plane V1 to the second vertical plane V2, where it connects to the first connection portion 510 of the third air valve 500. The manifold 700 is located on the second vertical plane V2 and is connected to the second connection portion 520 of the third air valve 500.

[0081] First and second gas manifolds 100, 200 are located on a third vertical plane V3, which is perpendicular to first and second vertical planes V1, V2. Specifically, the central axes of first and second gas manifolds 100, 200 are located on third vertical plane 930, and third vertical plane V3 is perpendicular to the second direction. As a result, the dimensions of first and second gas manifolds 100, 200 in the second direction are small.

[0082] In some embodiments of the present application, Figure 1 and Figure 2 As shown, on a plane perpendicular to the second direction, at least two of the orthographic projections of the first air valve 300, the second air valve 400, and the third air valve 500 have an overlapping area. That is, on a plane perpendicular to the second direction, the orthographic projections of the first air valve 300 and the second air valve 400 have an overlapping area, or the orthographic projections of the second air valve 400 and the third air valve 500 have an overlapping area, or the orthographic projections of the first air valve 300 and the third air valve 500 have an overlapping area.

[0083] In this way, the overall size of the first air valve 300, the second air valve 400 and the third air valve 500 in the first direction is smaller, which is beneficial to reducing the occupied space of the refrigerant switching device 1 in the first direction, thereby facilitating the miniaturization of the refrigerant switching device 1.

[0084] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the refrigerant switching device 1 further has a third direction (indicated by arrow C in the figure), and the first, second, and third directions are perpendicular to each other. The axes of the first, second, and third valves 300, 400, and 500 extend along the third direction. The coils of the first, second, and third valves 300, 400, and 500 are located on a first horizontal plane H1, which is perpendicular to the third direction.

[0085] In this way, the upper end of the first air valve 300, the upper end of the second air valve 400 and the upper end of the third air valve 500 can be located in the same plane or approximately in the same plane, and the lower end of the first air valve 300, the lower end of the second air valve 400 and the lower end of the third air valve 500 can be located in the same plane or approximately in the same plane. The overall size of the first air valve 300, the second air valve 400 and the third air valve 500 in the third direction is smaller, which is beneficial to reducing the space occupied by the refrigerant switching device 1 in the third direction, thereby facilitating the miniaturization of the refrigerant switching device 1.

[0086] In some embodiments of the present application, Figure 1As shown, the axis of the first valve 300 is located on the first vertical plane V1, the axis of the second valve 400 and the axis of the third valve 500 are located on the second vertical plane V2, and the first vertical plane V1 and the second vertical plane V2 are parallel to each other and perpendicular to the first direction.

[0087] That is to say, on a plane perpendicular to the second direction, the orthographic projection of the second air valve 400 and the orthographic projection of the third air valve 500 may completely overlap, or the area of the orthographic projection of the second air valve 400 is larger than the area of the orthographic projection of the third air valve 500, and the orthographic projection of the second air valve 400 may cover the orthographic projection of the third air valve 500; or the area of the orthographic projection of the second air valve 400 is smaller than the area of the orthographic projection of the third air valve 500, and the orthographic projection of the third air valve 500 may cover the orthographic projection of the second air valve 400.

[0088] In this way, the overall size of the first air valve 300, the second air valve 400 and the third air valve 500 in the first direction is further reduced, further reducing the space occupied by the refrigerant switching device 1 in the first direction, so that the refrigerant switching device 1 takes into account both the size in the first direction and the size in the second direction, avoiding the refrigerant switching device 1 being too large in a certain direction.

[0089] In some embodiments of the present application, Figure 2-Figure 6 As shown, the refrigerant switching device 1 further includes a three-way pipe 600, which is respectively connected to the first gas valve 300, the second gas valve 400, and the third gas valve 500. Thus, by providing the three-way pipe 600, it is possible to achieve communication between the first gas valve 300 and the second gas valve 400 and the third gas valve 500, eliminating the need to separately provide a pipe between the first gas valve 300 and the third gas valve 500 or between the second gas valve 400 and the third gas valve 500. This reduces the number of pipes, facilitates assembly and disassembly, improves production efficiency, and saves space.

[0090] In some embodiments of the present application, Figure 1-Figure 3 As shown, in the second direction, the first gas valve 300 is located between the second gas valve 400 and the third gas valve 500. Thus, in the second direction, the tee 600 is also located between the second gas valve 400 and the third gas valve 500. The tee 600 can be configured in a "U" shape, which is convenient for the construction of the tee 600 and has high structural strength.

[0091] For example, when observed along the third direction, there is a first distance L1 between the axis of the first air valve 300 and the axis of the second air valve 400 in the second direction, and there is a second distance L2 between the axis of the first air valve 300 and the axis of the third air valve 500 in the second direction, and the first distance L1 is equal to the second distance L2.

[0092] In this way, the tee pipe 600 can be symmetrically arranged about the center point of the tee pipe 600 in the second direction. The structure of the tee pipe 600 is more symmetrical. There is no need to identify the direction when installing the tee pipe 600, which makes installation more convenient and the force on the tee pipe 600 is more uniform.

[0093] In other embodiments of the present application, in the second direction, the second air valve 400 can be located between the first air valve 300 and the third air valve 500, and the three-way pipe 600 can be configured in an "L" shape. In this way, the layout of the refrigerant switching device 1 is more diverse, and the refrigerant switching device 1 can have different layouts according to different components to achieve a miniaturized configuration of the refrigerant switching device 1.

[0094] like Figure 3 、 Figure 5 and Figure 6 As shown, the above-mentioned three-way pipe 600 includes a first connecting section 610, a second connecting section 630, a third connecting section 650, a first transition section 620 and a second transition section 640, wherein the first connecting section 610, the first transition section 620, the second connecting section 630, the second transition section 640 and the third connecting section 650 are connected in sequence.

[0095] The first connecting section 610 is connected to the second air valve 400 and is located on the second vertical plane V2, the second connecting section 630 is connected to the first air valve 300 and is located on the first vertical plane V1, the third connecting section 650 is connected to the third air valve 500 and is located on the second vertical plane V2, the first transition section 620 is connected between the first connecting section 610 and the second connecting section 630, and the second transition section 640 is connected between the second connecting section 630 and the third connecting section 650.

[0096] In this way, not only can the three-way pipe 600 be connected with the first air valve 300, the second air valve 400 and the third air valve 500, but the first connecting section 610 and the third connecting section 650 are located on the second vertical plane V2, and the second connecting section 630 is located on the first vertical plane V1, ensuring that the size of the refrigerant switching device 1 in the first direction is smaller.

[0097] like Figure 4-Figure 6 As shown, the second connecting section 630 is provided with an interface 631, which is connected to the first air valve 300, wherein the central axis of the first transition section 620 and the central axis of the second transition section 640 are located on the inclined surface M, and the angle Q between the central axis of the interface 631 and the inclined surface M is not less than 20° and not more than 30°. For example, the angle Q can be 20°, 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, or 30°.

[0098] Specifically, the central axis of the interface 631 may coincide with the axis of the first gas valve 300 , the first transition section 620 is inclined relative to the first vertical plane V1 and the second vertical plane V2 , and the second transition section 640 is inclined relative to the first vertical plane V1 and the second vertical plane V2 .

[0099] When the angle Q is less than 20°, the distance between the first vertical plane V1 and the second vertical plane V2 is small, the first air valve 300 may interfere with the second branch air pipe 210 described below, and the third air valve 500 may interfere with the first branch air pipe 110; when the angle Q is greater than 30°, the distance between the first vertical plane V1 and the second vertical plane V2 is large, resulting in the refrigerant switching device 1 being too large in the first direction.

[0100] By setting the angle Q between 20° and 30°, on the one hand, the distance between the first vertical plane V1 and the second vertical plane V2 will not be too small, which can avoid interference between the first air valve 300 and the second branch air pipe 210 described below, and avoid interference between the third air valve 500 and the first branch air pipe 110. On the other hand, the distance between the first vertical plane V1 and the second vertical plane V2 will not be too large, which can ensure that the size of the refrigerant switching device 1 in the first direction is small.

[0101] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the central axis of the first gas collecting pipe 100 is located on the second horizontal plane H2, the central axis of the second gas collecting pipe 200 is located on the third horizontal plane H3, the first horizontal plane H1, the second horizontal plane H2 and the third horizontal plane H3 are arranged in parallel and spaced apart, and the second horizontal plane H2 and the third horizontal plane H3 are located on the same side of the first horizontal plane H1.

[0102] The first branch air pipe 110 is located at the second horizontal plane H2, and the second branch air pipe 210 is located at the third horizontal plane H3.

[0103] In this way, there will be no interference between the first branch air pipe 110 and the second branch air pipe 210, which facilitates the layout of the first branch air pipe 110 and the second branch air pipe 210, and the first branch air pipe 110 is shorter in the second direction, and the second branch air pipe 210 is shorter in the second direction, which reduces cost and weight.

[0104] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the first connecting section 610 and the third connecting section 650 are located on the second horizontal plane H2, and the second connecting section 630 is located on the third horizontal plane H3. In this way, the dimensions of the first branch air pipe 110, the second branch air pipe 210, and the three-way pipe 600 in the third direction remain unchanged or almost unchanged, which helps to ensure that the dimensions of the refrigerant switching device 1 in the third direction remain unchanged or almost unchanged.

[0105] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the third gas valve 500 is closer to the second gas manifold 200 than the second gas valve 400. The second branch gas pipe 210 includes a first extension section 211, a second extension section 212 and a third extension section 213.

[0106] The first extension section 211 is connected to the second air valve 400 and is located on the second vertical plane V2. One end of the second extension section 212 is connected to the first extension section 211. The third extension section 213 is connected to the second air collecting pipe 200 and is located on the first vertical plane V1. The third extension section 213 is connected to the other end of the second extension section 212. The first extension section 211 and the third air valve 500 are spaced apart in the second direction.

[0107] Since the second air valve 400 and the third air valve 500 are both located on the second vertical plane V2, the second branch air pipe 210 extending in a straight line will interfere with the third air valve 500. By setting the second extension section 212 to extend obliquely relative to the second vertical plane V2, the first extension section 211 and the third air valve 500 are spaced apart in the second direction, and the third extension section 213 and the third air valve 500 are spaced apart in the first direction, the second branch air pipe 210 can avoid the third air valve 500, and the first extension section 211 is located on the second vertical plane V2, and the third extension section 213 is located on the first vertical plane V1, the size of the refrigerant switching device 1 in the first direction will not increase.

[0108] Further, if Figure 2 and Figure 3 As shown, the second horizontal plane H2 is located between the first horizontal plane H1 and the third horizontal plane H3. In this way, the third horizontal plane H3 is farther away from the coil of the third air valve 500. The outer diameter of the area where the coil of the third air valve 500 is located is larger than the outer diameter of the rest of the third air valve 500. Therefore, by setting the third horizontal plane H3 at a greater distance from the coil of the third air valve 500, the second extension section 212 is tilted at a smaller angle relative to the second vertical plane V2, so that the third air valve 500 can be avoided. The setting flexibility of the second extension section 212 is higher, which is conducive to increasing the diversity of the structure of the second branch air pipe 210 and reducing the probability of interference.

[0109] In some embodiments of the present application, Figure 1-Figure 3 As shown, the manifold 700 also includes a first air outlet 710, a filter 730 and a second air outlet 720. The first air outlet 710, the filter 730 and the second air outlet 720 can be formed into an integrated structure, or the first air outlet 710, the filter 730 and the second air outlet 720 can be separately provided and then assembled into one.

[0110] One end of the first air outlet 710 is connected to the third air valve 500 and extends away from the second air valve 400. One end of the filter 730 is connected to the other end of the first air outlet 710 and is located below the air manifold. The second air outlet 720 is connected to the other end of the filter 730 and extends away from the second air valve 400.

[0111] Among them, during the assembly of the refrigerant switching device 1, the second air outlet 720 may need to be welded with other pipes. During the welding process, in order to prevent impurities and the like from moving to the third air valve 500 and causing the third air valve 500 to be blocked, a filter 730 is provided to reduce the probability of impurities moving to the third air valve 500, avoid the third air valve 500 from being blocked, and ensure the normal use of the third air valve 500.

[0112] Further, if Figure 1 As shown, the central axis of the first air outlet 710, the central axis of the filter 730, and the central axis of the second air outlet 720 are located on the second vertical plane V2. In this way, the size of the first air outlet 710 and the second air outlet 720 are reduced, reducing cost and weight. Moreover, the layout of the first air outlet 710 and the second air outlet 720 does not increase the size of the refrigerant switching device 1 in the first direction or excessively increase the size of the refrigerant switching device 1 in the first direction, which is conducive to the miniaturization of the refrigerant switching device 1.

[0113] In some embodiments of the present application, Figure 3 As shown, the inner diameter of the filter 730 is larger than the inner diameter of the first air outlet 710, and the inner diameter of the filter 730 is larger than the inner diameter of the second air outlet 720. By setting the inner diameter of the filter 730 larger, the filter 730 can be prevented from affecting the pressure of the refrigerant switching device 1, thereby ensuring the flow efficiency of the refrigerant in the refrigerant switching device 1.

[0114] like Figure 7 As shown, the refrigerant flow diagram of the majority of indoor units in the HVAC system 6 provided in the embodiment of the present application is in the heating state, and this is used as an example to describe the performance of the HVAC system 6. In this example, the first gas collection pipe 100 is a high-pressure gas pipe, and the second gas collection pipe 200 is a low-pressure gas pipe.

[0115] For the indoor unit in heating mode, the refrigerant flows from the outdoor unit → first gas header 100 (high-pressure gas pipe) → first branch gas pipe 110 → first gas valve 300 → tee pipe 600 → third gas valve 500 → manifold 700 → indoor unit → indoor unit liquid pipe → outdoor unit. This completes a heating cycle.

[0116] For an indoor unit in cooling mode, during heating mode operation, when the refrigerant flows to the liquid pipe, a portion is diverted to the plate heat exchanger. The refrigerant flows in the following direction: plate heat exchanger → indoor unit liquid pipe → indoor unit → indoor unit gas pipe → manifold 700 → third gas valve 500 → tee pipe 600 → second gas valve 400 → second branch gas pipe 210 → second gas header 200 (low-pressure gas pipe) → outdoor unit. After flowing out of the plate heat exchanger, a portion of the refrigerant flows in the following direction: refrigerator → second gas header 200 → outdoor unit. This completes a refrigeration cycle.

[0117] It should be noted that, taking the four indoor units in this embodiment as an example, three indoor units can be used for cooling and one indoor unit for heating; or three indoor units can be used for heating and one indoor unit for cooling. There is no specific limitation on the number of indoor units or the actual cooling mode; all units can be used for cooling or all units can be used for cooling.

[0118] like Figure 8 and Figure 9 As shown, the refrigerant switching device 1 also includes a shell 5 and a liquid pipe 4. The liquid pipe 4 and the gas collection pipe are installed in the shell 5. The side panel 51 of the shell 5 is provided with three pipe openings 52. The liquid pipe 4, the first gas collection pipe 100 and the second gas collection pipe 200 respectively pass through a pipe opening 52 and extend out of the shell 5.

[0119] like Figure 10-12 As shown, a support rod 820 is provided in the housing 5. The support rod 820 is located below the end of the tee pipe 600 connected to the second air valve 400 and is used to support the end of the tee pipe 600 connected to the second air valve 400. A vibration damping pad 810 can be provided between the tee pipe 600 and the support rod 820 to absorb the movement force of the tee pipe 600 and the support rod 820, thereby reducing the impact of the tee pipe 600 and the support rod 820 on each other's position and installation stability.

[0120] In addition, the support rod 820 is connected to the crimping part 940, which is located at one end of the three-way pipe 600 connected to the second air valve 400. The support rod 820 and the crimping part 940 surround one end of the three-way pipe 600 connected to the second air valve 400 to prevent the three-way pipe 600 from shaking.

[0121] In addition, the first gas manifold 100 and the second gas manifold 200 are fixed in relative position by the fixing member 830 to avoid the relative position between the first gas manifold 100 and the second gas manifold 200, thereby reducing installation difficulty and improving production efficiency.

[0122] like Figure 15As shown, the HVAC system 6 also includes a heat source unit 3 and multiple load units 2. The liquid pipe 4, the first gas manifold 100 and the second gas manifold 200 are all connected to the heat source unit 3, and the load unit 2 is connected to the refrigerant switching device 1. The heat source unit 3 can be a compressor, a part of the load unit 2 can be an indoor unit, and the other part of the load unit 2 can be an outdoor unit. The indoor unit is connected to the refrigerant switching device 1, and the outdoor unit is directly connected to the first gas manifold 100 and the second gas manifold 200.

[0123] Other structures and operations of the refrigerant switching device 1 and the HVAC system 6 having the same according to the embodiment of the present application are well known to those skilled in the art and will not be described in detail here.

[0124] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0125] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A refrigerant switching device, characterized in that: The refrigerant switching device has a first direction and a second direction, the first direction and the second direction being perpendicular to each other; The refrigerant switching device includes: a plurality of gas manifolds, the gas manifolds extending along the first direction, the plurality of gas manifolds being spaced apart and including a first gas manifold and a second gas manifold, the pressure in the first gas manifold being different from the pressure in the second gas manifold; a plurality of first branch air pipes, connected to the first air collecting pipe, wherein the first branch air pipes are provided with first air valves; a plurality of second branch air pipes, connected to the second air collecting pipe, wherein the second branch air pipes are provided with second air valves; A plurality of confluence pipes, wherein one of the first branch air pipes and one of the second branch air pipes converge into one confluence pipe, the confluence pipe is connected to the indoor unit and is provided with a third air valve; The first gas valve, the second gas valve and the third gas valve are located on the same side of the first gas manifold and the second gas manifold in the second direction.

2. The refrigerant switching device according to claim 1, characterized in that: The refrigerant switching device further has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; When viewed along the third direction, two of the first, second and third valves are located on a first vertical plane, and the remaining valve is located on a second vertical plane. The first and second vertical planes are perpendicular to the first direction and are spaced apart along the first direction.

3. The refrigerant switching device according to claim 2, characterized in that: Also includes: A three-way pipe, wherein the first gas valve, the second gas valve and the third gas valve are connected to the three-way pipe; The first gas valve is located on the first vertical plane, and the second gas valve and the third gas valve are located on the second vertical plane; In the second direction, the second gas valve is farther away from the first gas manifold and the second gas manifold than the third gas valve, and the first gas valve is farther away from the first gas manifold and the second gas manifold than the third gas valve; The tee pipe spans the first vertical surface and the second vertical surface.

4. The refrigerant switching device according to claim 3, characterized in that: Each of the first, second and third air valves includes a first connecting portion and a second connecting portion, wherein the first connecting portion extends in the second direction and the second connecting portion extends in the third direction; The first branch gas pipe extends along the second direction and connects the first gas collecting pipe and the first connecting portion of the first gas valve; The second branch gas pipe extends along the second direction and connects the second gas collecting pipe and the second connecting portion of the second gas valve; The three-way pipe includes a first pipe, a second pipe, and a third pipe that are connected to each other. The first pipe, the second pipe, and the third pipe meet at the first vertical plane. The first pipe extends along the third direction and is connected to the second connection portion of the first gas valve. The second pipe extends along the second direction and extends from the first vertical plane to the second vertical plane, and is connected to the first connection portion of the second gas valve at the second vertical plane. The third pipe extends along the second direction and extends from the first vertical plane to the second vertical plane, and is connected to the first connection portion of the third gas valve at the second vertical plane. The manifold is located on the second vertical surface and is connected to the second connection portion of the third gas valve.

5. The refrigerant switching device according to claim 2, characterized in that: The first gas header and the second gas header are located on a third vertical plane, and the third vertical plane is perpendicular to the first vertical plane and the second vertical plane.

6. The refrigerant switching device according to claim 1, characterized in that: On a plane perpendicular to the second direction, at least two of the orthographic projection of the first gas valve, the orthographic projection of the second gas valve, and the orthographic projection of the third gas valve have an overlapping area.

7. The refrigerant switching device according to claim 1, characterized in that: The refrigerant switching device further has a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The axis of the first gas valve, the axis of the second gas valve and the axis of the third gas valve extend along the third direction; The first air valve, the second air valve and the third air valve are located at the same level and on a first horizontal plane, and the first horizontal plane is perpendicular to the third direction.

8. The refrigerant switching device according to claim 7, characterized in that: The axis of the first valve is located on a first vertical plane, the axes of the second valve and the third valve are located on a second vertical plane, and the first vertical plane and the second vertical plane are parallel to each other and perpendicular to the first direction.

9. The refrigerant switching device according to claim 8, characterized in that: Also includes: The three-way pipe is connected to the first gas valve, the second gas valve and the third gas valve respectively.

10. The refrigerant switching device according to claim 9, characterized in that: In the second direction, the first gas valve is located between the second gas valve and the third gas valve.

11. The refrigerant switching device according to claim 9, characterized in that: Observed along the third direction, there is a first distance between the axis of the first valve and the axis of the second valve in the second direction, and a second distance between the axis of the first valve and the axis of the third valve in the second direction, and the first distance is equal to the second distance.

12. The refrigerant switching device according to claim 9, characterized in that: The three-way pipe comprises: a first connecting section, connected to the second air valve and located on the second vertical surface; a second connecting section, connected to the first air valve and located on the first vertical surface; a third connecting section, connected to the third air valve and located on the second vertical surface; a first transition section connected between the first connecting section and the second connecting section; as well as The second transition section is connected between the second connecting section and the third connecting section.

13. The refrigerant switching device according to claim 12, characterized in that: The second connecting section is provided with an interface, and the interface is communicated with the first gas valve; The central axis of the first transition section and the central axis of the second transition section are located on an inclined surface, and the angle between the central axis of the interface and the inclined surface is not less than 20° and not more than 30°.

14. The refrigerant switching device according to claim 12, characterized in that: The central axis of the first gas collecting pipe is located on a second horizontal plane, the central axis of the second gas collecting pipe is located on a third horizontal plane, and the first horizontal plane, the second horizontal plane and the third horizontal plane are arranged in parallel and spaced apart; The first branch trachea is located at the second horizontal plane, and the second branch trachea is located at the third horizontal plane; The second horizontal plane and the third horizontal plane are located on the same side of the first horizontal plane.

15. The refrigerant switching device according to claim 14, characterized in that: The first connecting section and the third connecting section are located on the second horizontal plane; The second connecting section is located on the third horizontal plane.

16. The refrigerant switching device according to claim 8, characterized in that: The third gas valve is closer to the second gas manifold than the second gas valve; The second branch trachea comprises: a first extension section, connected to the second air valve and located on the second vertical surface; a second extension section, one end of the second extension section being connected to the first extension section; a third extension section, connected to the second gas manifold and located on the first vertical plane, the third extension section being connected to the other end of the second extension section; Wherein, the first extension section and the third air valve are spaced apart in the second direction.

17. The refrigerant switching device according to claim 16, characterized in that: The central axis of the first gas collecting pipe is located on a second horizontal plane, the central axis of the second gas collecting pipe is located on a third horizontal plane, and the first horizontal plane, the second horizontal plane and the third horizontal plane are arranged in parallel and spaced apart; The second horizontal plane is located between the first horizontal plane and the third horizontal plane.

18. The refrigerant switching device according to claim 8, characterized in that: The manifold further comprises: a first air outlet, one end of which is connected to the third air valve and extends in a direction away from the second air valve; a filter, one end of which is connected to the other end of the first air outlet and is located below the air collecting pipe; The second air outlet is communicated with the other end of the filter and extends in a direction away from the second air valve.

19. The refrigerant switching device according to claim 18, characterized in that: The central axis of the first air outlet passage, the central axis of the filter, and the central axis of the second air outlet passage are located in the second vertical plane.

20. The refrigerant switching device according to claim 18, characterized in that: The inner diameter of the filter is larger than the inner diameter of the first air outlet; and / or An inner diameter of the filter is larger than an inner diameter of the second air outlet passage.

21. The refrigerant switching device according to any one of claims 1 to 20, characterized in that: The central axis of the first gas collecting pipe and the central axis of the second gas collecting pipe are located on a third vertical plane, and the third vertical plane is perpendicular to the second direction.

22. The refrigerant switching device according to claim 3 or 9, characterized in that: Also includes: The shell has a side panel provided with a pipe opening, the first air valve, the second air valve, the third air valve, the first branch air pipe, the second branch air pipe and the air collecting pipe are arranged in the shell, and the air collecting pipe is passed through the pipe opening and extends out of the shell.

23. The refrigerant switching device according to claim 22, characterized in that: A support rod, a vibration-damping pad and a crimping portion are provided in the shell. The support rod is located below one end of the three-way pipe connected to the second air valve, and is used to support the three-way pipe. The vibration-damping pad is located between the three-way pipe and the support rod. The crimping portion is connected to the support rod and pressed above the three-way pipe.

24. The refrigerant switching device according to claim 22, characterized in that: The first gas manifold and the second gas manifold are respectively connected to fixing members, and the fixing members are located in the shell to fix the relative positions of the first gas manifold and the second gas manifold.

25. A HVAC system, characterized in that: include: Indoor and outdoor units; According to any one of claims 1 to 24, the indoor unit is connected to the manifold, and the outdoor unit is connected to the gas manifold.

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