CN106196345B

CN106196345B - Switching device for multi-split air conditioner and multi-split air conditioner with switching device

Info

Publication number: CN106196345B
Application number: CN201610709381.XA
Authority: CN
Inventors: 钟如江; 庄子宝; 周文杰
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2016-08-23
Filing date: 2016-08-23
Publication date: 2021-12-31
Anticipated expiration: 2036-08-23
Also published as: CN106196345A

Abstract

The invention discloses a switching device for a multi-split air conditioner and the multi-split air conditioner with the switching device, wherein the switching device for the multi-split air conditioner comprises: the base comprises a bottom wall and a side wall, and the side wall surrounds the bottom wall and extends upwards from the edge of the bottom wall; the water pan is arranged in the base, and the bottom surface of the water pan is vertically spaced from the bottom wall of the base; the plurality of vibration reduction pads are arranged on the water receiving tray and are arranged at intervals along the circumferential direction of the water receiving tray; a plurality of mountings are established respectively and are linked to each other on a plurality of damping pads and with the lateral wall of base, and a plurality of mountings all separate with the water collector. According to the switching device for the multi-split air conditioner, noise generated when a refrigerant flows through the heat exchange system is effectively prevented from being transmitted to the base through the water receiving disc, so that the noise of the air conditioner using the switching device is greatly reduced, the use occasions and the installation positions of the air conditioner are enlarged, and the comfort of the air conditioner is improved.

Description

Switching device for multi-split air conditioner and multi-split air conditioner with switching device

Technical Field

The invention relates to the technical field of air conditioners, in particular to a switching device for a multi-split air conditioner and the multi-split air conditioner with the switching device.

Background

In the related art, in the switching device of the air conditioner, the water pan is usually disposed inside the base, and the heat exchange component and the like are installed above the water pan, so that the water pan collects the condensed water generated by the heat exchange component. However, the noise generated when the refrigerant flows through the heat exchange system can be transmitted to the base through the water receiving disc, so that the noise of the air conditioner is high, and the use occasion and the installation position of the air conditioner are greatly limited.

In addition, the air conditioner switching device can realize independent cooling and heating of different internal machines through the valve body and relevant control, however, the number of the connectable internal machines is limited due to the limitation of system arrangement and structural space, generally, the number is less than six interfaces, namely, the capacity is not large enough, and if the size of a box body of the switching device is increased proportionally on the existing basis, the whole device is too large, and the use occasion and the installation position are influenced. In addition, many of the existing small-sized switching devices are foamed inside the cabinet, so that the whole refrigeration part cannot be maintained.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a switching device for a multi-split air conditioner, which can effectively reduce noise of the air conditioner and is not easy to affect use occasions and installation positions.

Another object of the present invention is to provide a multi-split air conditioner having the above switching device.

The switching device for the multi-split air conditioner according to the first aspect of the present invention includes: a base including a bottom wall and a side wall surrounding the bottom wall and extending upwardly from an edge of the bottom wall; the water receiving tray is arranged in the base, and the bottom surface of the water receiving tray is vertically spaced from the bottom wall of the base; the damping pads are arranged on the water receiving tray and are arranged at intervals along the circumferential direction of the water receiving tray; the fixing pieces are arranged on the damping pads respectively and connected with the side walls of the base, and the fixing pieces are spaced from the water pan.

According to the switching device for the multi-split air conditioner, the ground of the water pan is separated from the inner wall of the base, and the vibration damping pad is arranged on the water pan, so that the water pan is separated from the fixing piece, and therefore, noise generated when a refrigerant flows through the heat exchange system is effectively prevented from being transmitted to the base through the water pan, the noise of the air conditioner using the base assembly is greatly reduced, the use occasion and the installation position of the switching device cannot be influenced, the use occasion and the installation position of the air conditioner are enlarged, and the comfort of the air conditioner is improved.

In addition, the switching device for the multi-split air conditioner according to the present invention may further have the following additional technical features:

according to some embodiments of the present invention, each of the damping pads has a catching groove formed as an annular groove extending in a circumferential direction of the damping pad, and each of the fixing members includes: the clamping groove penetrates through an opening of the groove part and is matched with the bottom of the groove part; the connecting part is connected to one side of the clamping part, which is adjacent to the side wall of the base, and is connected with the side wall of the base.

Furthermore, the bottom wall of the base is provided with at least one supporting vibration damping pad, and the supporting vibration damping pad is positioned between the bottom surface of the water pan and the bottom wall of the base.

According to some embodiments of the invention, the upper surface of the supporting damping pad is formed with a blind hole recessed downward, and the switching device further comprises: and the positioning screw penetrates through the bottom wall of the base and the bottom wall of the blind hole from bottom to top so as to connect the support vibration damping pad on the base.

Optionally, a sponge piece is arranged on the bottom surface of the water receiving tray.

Specifically, the bottom wall of the base is provided with a vibration-proof rubber.

According to some embodiments of the present invention, the multi-split air conditioner includes an external unit, a plurality of internal units having a plurality of first interfaces and a plurality of second interfaces, and the switching device further includes:

the bottom of the shell is open, and the shell is arranged above the base;

the gas-liquid separator is arranged in the shell and provided with an inlet, a first outlet and a second outlet, and the inlet is suitable for being connected with the external machine;

the first outlet is respectively connected with the first interfaces through the first inner machine interface pipelines;

at least one heat exchange component, one end of the heat exchange component is connected with the second outlet; and

a plurality of second interior machine interface pipelines, a plurality of second interior machine interface pipelines with a plurality of first interior machine interface pipelines with first direction vertically second direction is spaced apart, just a plurality of second interior machine interface pipelines are in spaced apart on the first direction, wherein heat transfer component's the other end passes through a plurality of second interior machine interface pipelines with a plurality of second interfaces link to each other respectively, a plurality of first interior machine interface pipelines with part in a plurality of second interior machine interface pipelines with all the other first interior machine interface pipelines with second interior machine interface pipelines are in spaced apart on the second direction.

Further, the switching device further includes: the electromagnetic valve assembly comprises a plurality of groups of electromagnetic valve groups, a first U-shaped pipe and a second U-shaped pipe which are arranged side by side, each group of electromagnetic valve groups comprises a first one-way electromagnetic valve and a second one-way electromagnetic valve, the first U-shaped pipe is connected with the first outlet, the first U-shaped pipe is respectively connected with the plurality of first inner machine interface pipelines through the plurality of first one-way electromagnetic valves, the plurality of first inner machine interface pipelines are respectively suitable for being connected with the outer machine through the plurality of second one-way electromagnetic valves, the first one-way electromagnetic valve is configured to guide the refrigerant in the first U-shaped pipe into the corresponding first inner machine interface pipeline in a one-way mode, the second one-way solenoid valve is configured to be suitable for guiding the refrigerant in the first inner machine interface pipeline into the outer machine in a one-way mode, one of the first U-shaped pipe and the second U-shaped pipe is positioned at the inner side of the other one of the first U-shaped pipe and the second U-shaped pipe; the check valve assembly is arranged below the electromagnetic valve assembly and comprises a plurality of groups of check valve sets which extend horizontally and are arranged side by side, each group of check valve sets comprises a first check valve and a second check valve which are suitable for being connected in parallel between the heat exchange part and the second indoor unit interface pipeline, the first check valve is suitable for guiding the refrigerant of the heat exchange part to the indoor unit in a one-way mode, and the second check valve is suitable for guiding the refrigerant of the indoor unit to the heat exchange part in a one-way mode.

According to some embodiments of the present invention, the housing is substantially rectangular, the first direction is a length direction of the housing, the heat exchanging component, the solenoid valve component and the check valve component are all disposed in the housing, the solenoid valve component is disposed above the check valve component, the solenoid valve component and the check valve component are located on one side of the length direction of the housing, the gas-liquid separator and the heat exchanging component are disposed on the other side of the length direction of the housing, the gas-liquid separator and the heat exchanging component are sequentially arranged in a width direction of the housing, an electric control box component is disposed outside the housing, and the electric control box component is vertically disposed and located on a side surface of the housing.

A multi-split air conditioner according to a second aspect of the present invention includes the switching device for a multi-split air conditioner according to the above-described first aspect of the present invention.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of a base according to an embodiment of the present invention;

FIG. 2 is an exploded view of the base shown in FIG. 1;

FIG. 3 is an enlarged view of portion A circled in FIG. 2;

FIG. 4 is another exploded view of the base shown in FIG. 1;

FIG. 5 is an enlarged view of the portion B circled in FIG. 4;

FIG. 6 is an exploded view of a switching device according to an embodiment of the present invention;

FIG. 7 is another exploded view of the switching device shown in FIG. 6;

FIG. 8 is an assembled schematic view of the base, solenoid valve assembly, check valve assembly, gas-liquid separator and heat exchange components shown in FIG. 7;

fig. 9 is a schematic diagram of a switching device according to an embodiment of the present invention.

Reference numerals:

a switching device 100;

a base 1, a mounting part 11, an anti-vibration glue 12, a second avoiding part 121,

a water pan 2, a water pan bottom wall 21, a water pan side wall 22, a flange 221, a drain pipe 23, a sponge piece 24,

the vibration damping pad 3, the clamping groove 31,

the fixing member 4, the click-in portion 41, the groove portion 411, the connecting portion 42,

a threaded fastener 5, a support damping pad 6, a blind hole 61, a weight reduction groove 62, a set screw 7,

the combination of the housing 10, the top cover 120,

a gas-liquid separator 20, an inlet 210, a first outlet 220, a second outlet 230,

a first inner machine interface pipeline 30, a heat exchange part 40, a second inner machine interface pipeline 50, a solenoid valve assembly 60,

an electromagnetic valve group 610, a first single-way electromagnetic valve 6110, a second single-way electromagnetic valve 6120,

the first U-shaped tube 620, the second U-shaped tube 630,

the one-way valve assembly 70, the first one-way valve 710, the second one-way valve 720,

extension 80, throttling arrangement 90, electric control box subassembly 910.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The switching device 100 for the multi-split air conditioner according to the embodiment of the present invention will be described with reference to fig. 1 to 5. The switching device 100 is suitable for an air conditioner such as a multi-split air conditioner.

As shown in fig. 1, a switching device 100 for a multi-split air conditioner according to an embodiment of a first aspect of the present invention includes: base 1, water collector 2, a plurality of damping pad 3 and a plurality of mounting 4. The base 1 may be a bottom support of the switching device 100.

Specifically, referring to fig. 1 and 2, the base 1 includes a bottom wall and a side wall. Wherein the side wall of the base 1 surrounds the bottom wall of the base 1 and extends upwards from the edge of the bottom wall. The bottom wall of the base 1 may be formed substantially in a rectangular shape, but is not limited thereto. For example, the bottom wall of the base 1 may be formed in a circular shape, a triangular shape, an irregular shape, etc., and the specific shape thereof may be designed according to the specification of the air conditioner, which is not particularly limited in the present invention. The side walls of the base 1 may surround the bottom wall of the base 1 and extend vertically upward from the bottom wall of the base 1. The structure is simple, the processing is convenient, and the assembly of the base assembly 100 and the components of the air conditioner such as the shell is convenient.

The water pan 2 is arranged in the base 1, and the bottom surface of the water pan 2 is spaced from the bottom wall of the base 1 up and down. Specifically, referring to fig. 2, the drip tray 2 includes a drip tray bottom wall 21 and a drip tray side wall 22, the drip tray side wall 22 surrounding the drip tray bottom wall 21 and extending upwardly from an edge of the drip tray bottom wall 21 to define a water collection sump between the drip tray bottom wall 21 and the drip tray side wall 22. Therefore, the water receiving tray 2 is convenient to collect condensed water and the like generated by the heat exchange component of the air conditioner.

The lower surface of the drip tray bottom wall 21 is spaced from the bottom wall of the base 1 up and down. That is, the lower surface of the drip tray bottom wall 21 does not directly contact the bottom wall of the base 1. Therefore, the noise generated when the refrigerant flows through the heat exchange system can be effectively prevented from being transmitted to the base 1 through the water receiving disc 2, and the noise of the air conditioner using the base assembly 100 is greatly reduced.

Further, a drain pipe 23 is arranged on the side wall 22 of the water pan, and the drain pipe 23 is arranged adjacent to the bottom wall 21 of the water pan. The side wall of the base 1 is provided with a mounting part 11, and a drain pipe 23 passes through the mounting part 11 so as to drain water in the water collecting tank. The mounting portion 11 may be formed as a U-shaped groove penetrating the top of the sidewall of the base 1 (as shown in fig. 1), but is not limited thereto. For example, the mounting portion 11 may also be formed as a through hole (not shown) penetrating through the thickness direction of the sidewall of the chassis 1.

A plurality of damping pad 3 establish on water collector 2 and along the circumference interval setting of water collector 2, specifically, can be formed with the turn-ups 221 that extends towards the center level of water collector 2 on the water collector lateral wall 22, and damping pad 3 can establish on turn-ups 221. For example, in the example of fig. 2, the left side wall and the right side wall of the water pan 2 are respectively provided with a flange 221, and the number of the damping pads 3 is four, wherein the flange 221 of the left side wall of the water pan 2 is provided with two damping pads 3, and the flange 221 of the right side wall of the water pan 2 is provided with two damping pads 3.

Here, it is to be noted that, in the description of the present invention, the meaning of "a plurality" is two or more, for example, three, four, etc., unless otherwise specified.

In particular, with reference to figure 2 in combination with figure 3, the damping pad 3 may be attached to the drip tray 2 by means of threaded fasteners 5. Wherein, the threaded fastener 5 can be a screw or a bolt, etc. For example, the damping pad 3 may be provided with screw holes through which the threaded fasteners 5 may be passed to connect to the drip tray 2. Simple structure and convenient assembly.

A plurality of mountings 4 are established respectively on a plurality of damping pad 3 and are continuous with the lateral wall of base 1, and a plurality of mountings 4 all separate with water collector 2. Specifically, referring to fig. 2 in combination with fig. 3, the fixing member 4 may be engaged with the damping pad 3 and then connected to the side wall of the base 1, and the water pan 2 and the fixing member 4 are spaced apart by the damping pad 3. Wherein the fixing member 4 may be connected to the side wall of the base 1 by a screw (not shown) or the like.

For example, during assembly, the fixing member 4 may be first engaged with the damping pad 3, and then the fixing member 4 may be attached to the side wall of the base 1 by a screw. From this, can firmly fix water collector 2 on base 1, and can avoid mounting 4 and water collector 2 direct contact effectively to the noise that produces when can avoid the refrigerant to flow through heat transfer system effectively propagates through water collector 2 to the lateral wall of base 1, thereby has further reduced the noise of the air conditioner that uses this auto-change over device 100, has enlarged the use occasion and the mounted position of air conditioner, has improved the travelling comfort of air conditioner. In addition, vibration of the switching device 100 can be effectively reduced, and stability of the switching device 100 can be improved.

According to the switching device 100 for the multi-split air conditioner, the bottom surface of the water pan 2 is spaced from the inner wall of the base 1, and the vibration damping pad 3 is arranged on the water pan 2, so that the water pan 2 is spaced from the fixing piece 4, and therefore noise generated when a refrigerant flows through the heat exchange system is effectively prevented from being transmitted to the base 1 through the water pan 2, noise and vibration of the air conditioner using the switching device 100 are greatly reduced, the use occasion and the installation position of the switching device cannot be influenced, the use occasion and the installation position of the air conditioner are enlarged, and comfort and stability of the air conditioner are improved.

According to some embodiments of the present invention, referring to fig. 3, the middle portion of each damping pad 3 has a catching groove 31. It is to be understood that the above-mentioned "middle portion" refers to a middle portion in a broad sense, and specifically, a position between the upper surface and the lower surface of the vibration-damping pad 3 may be understood as "the middle portion of the vibration-damping pad 3". For example, in the example of fig. 3, the damping pad 3 may be formed in a substantially cylindrical shape, and the catching groove 31 may be formed as an annular groove extending in the circumferential direction of the damping pad 3, but is not limited thereto.

Each fixing member 4 includes: a card-inserted portion 41 and a connecting portion 42, the card-inserted portion 41 having a groove portion 411 recessed from one side (e.g., a front side in fig. 3) of the card-inserted portion 41 toward a center of the card-inserted portion 41, the card slot 31 passing through an opening of the groove portion 411 and engaging with a bottom of the groove portion 411, the connecting portion 42 being connected to one side (e.g., a left side in fig. 3) of the card-inserted portion 41 adjacent to a side wall of the chassis 1 and connected to the side wall of the chassis 1. For example, referring to fig. 3, groove portion 411 may be formed substantially in a U-shape, and the bottom of groove portion 411 may be understood as a closed end of the U-shape. In assembly, the bottom of the groove portion 411 may be first clamped at the clamping groove 31, and then the connecting portion 42 may be fixed on the side wall of the base 1 by screws. Simple structure and convenient assembly.

Alternatively, the fixing member 4 may be a sheet metal member, but is not limited thereto. Therefore, the water receiving tray 2 can be firmly fixed on the side wall of the base 1, and the reliability of the base assembly 100 is improved.

According to some embodiments of the present invention, each damping pad 3 may be a rubber member, but is not limited thereto. For example, the damping pad 3 may be a plastic member. Therefore, the noise reduction effect can be effectively improved, the vibration of the base assembly 100 can be reduced, the processing is convenient, and the material cost and the processing cost are low.

Further, be equipped with at least one support damping pad 6 on the diapire of base 1, support damping pad 6 is located between the bottom surface of water collector 2 and the diapire of base 1. In particular, the support damping pad 6 may be one or more. For example, referring to fig. 4, the number of the support vibration damping pads 6 is plural, and may be nine. From this, can support water collector 2 through supporting damping pad 6 for water collector 2's position is stable, thereby has improved water collector 2's performance, and can reduce the noise that the refrigerant produced through supporting damping pad 6 and propagate to base 1. In addition, vibration of the switching device 100 can be effectively reduced, and stability of the switching device 100 can be improved.

Alternatively, the support vibration-damping pad 6 may be a rubber member, but is not limited thereto. For example, the supporting damping pad 6 may be a plastic member. Therefore, the effects of noise reduction and vibration reduction can be effectively improved, and the processing is convenient and the cost is low.

According to some embodiments of the present invention, referring to fig. 4 in combination with fig. 5, the upper surface of the support cushion 6 is formed with a blind hole 61 recessed downward. Wherein the support damping pad 6 may be formed substantially in a cylindrical shape. The cross section of the blind hole 61 may be formed in a circular shape, and the central axis of the blind hole 61 may coincide with the central axis of the support vibration-damping pad 6. Therefore, the material for supporting the vibration damping pad 6 can be effectively reduced, and the material cost for supporting the vibration damping pad 6 is effectively reduced. In addition, the weight of the supporting damping pad 6 is effectively reduced, and the contact area between the supporting damping pad 6 and the water pan 2 is increased, so that the stability of the water pan 2 is further improved.

Optionally, the peripheral wall supporting the damping pad 6 is provided with at least one lightening slot 62. One or more weight-reducing grooves 62 may be provided. The lightening grooves 62 may be formed by the peripheral wall of the support damper pad 6 being recessed toward the center of the support damper pad 6. The lightening grooves 62 may extend in the circumferential direction of the support damper pad 6, or may extend in the axial direction of the support damper pad 6, and the present invention is not particularly limited thereto. For example, in the example of fig. 5, the weight-reduction groove 62 is one, and the weight-reduction groove 62 extends in the circumferential direction of the support damper pad 6, and is simple in structure and easy to machine.

Further, the switching device 100 further includes: a set screw 7. Referring to fig. 5, a set screw 7 penetrates from bottom to top through the bottom wall of the base 1 and the bottom wall of the blind hole 61 of the support vibration damping pad 6 to connect the support vibration damping pad 6 to the base 1. Therefore, the supporting damping pad 6 can be firmly connected to the bottom wall of the base 1, so that the position of the supporting damping pad 6 is stable, and the supporting, noise reduction and damping performances of the supporting damping pad 6 are improved.

According to some embodiments of the present invention, the supporting damping pad 6 may be provided with a positioning hole for cooperating with the positioning screw 7, and the inner diameter of the positioning hole may be slightly smaller than the outer diameter of the positioning screw 7, so that the positioning hole and the positioning screw 7 can be more tightly and firmly matched.

During assembly, the positioning screw 7 sequentially penetrates through the bottom wall and the positioning hole of the base 1 from bottom to top, and the supporting vibration damping pad 6 can be fixed on the base 1. From this, reduced the assembly degree of difficulty of supporting damping pad 6, improved the fastness of supporting damping pad 6.

Specifically, the positioning hole may be located below the blind hole 61 and penetrate through the bottom wall of the blind hole 61. That is, the positioning holes may be formed as through holes. Therefore, the firmness of the supporting vibration damping pad 6 is further improved, the structure is simple, the processing is convenient, and the processing cost is reduced.

According to some embodiments of the invention, a sponge member 24 is provided on the bottom surface of the drip tray 2. Therefore, the condensation generated on the bottom surface of the water receiving tray 2 can be effectively reduced, and the downward transmission of noise through the bottom of the water receiving tray 2 can be further reduced. In addition, vibration of the foot assembly 100 may be further reduced.

Wherein the sponge member 24 can be bonded to the bottom surface of the drip tray 2. The area of the sponge piece 24 can be approximately the same as the bottom surface of the water pan 2, and the number of the sponge pieces 24 can be one or more. Further, be equipped with first portion of dodging on the sponge spare 24, first portion of dodging is constructed and is used for avoiding supporting damping pad 6 to make supporting damping pad 6 can be direct and the bottom surface contact of defrosting pan 2, thereby guaranteed the stability of defrosting pan 2.

Further, the bottom wall of the base 1 is provided with a vibration-proof rubber 12. Specifically, the anti-vibration glue 12 may be adhered to the inner wall of the base 1 and located below the water pan 2. Specifically, the vibration-proof rubber 12 may be located below the sponge member 24. Thereby, it is possible to further reduce the propagation of noise and vibration of the base assembly 100, thereby further improving the effects of vibration and noise reduction.

Alternatively, the vibration-proof rubber 12 may be a plurality of pieces, and the plurality of pieces of vibration-proof rubber 12 are spliced on the inner wall of the base 1. For example, in the example of fig. 4, the anti-vibration rubber 12 may be four pieces. Therefore, the bonding difficulty of the anti-vibration rubber 12 is effectively reduced, and the assembly efficiency is improved.

Specifically, the vibration-proof rubber 12 may be formed substantially in a rectangular shape, but is not limited thereto. A second escape 121 may be provided adjacent to the supporting damping pad 6 of the anti-vibration rubber 12 to facilitate assembly of the supporting damping pad 6.

The multi-split air conditioner comprises an external unit and a plurality of internal units with a plurality of first interfaces and a plurality of second interfaces. The outdoor unit is connected with the plurality of indoor units through the switching device 100, and the plurality of indoor units can be respectively arranged in the plurality of rooms, so that independent cooling or heating in different rooms can be realized through the switching device 100. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 6 and 9, the switching device 100 includes a casing 10, a gas-liquid separator 20, a plurality of first inner machine interface pipes 30, at least one heat exchanging part 40, and a plurality of second inner machine interface pipes 50.

Here, it should be noted that, in the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The bottom of the housing 10 is open, and the housing is disposed above the base 1. The housing 10 serves to enclose and protect various components disposed therein. The gas-liquid separator 20 is disposed in the casing 10, and the gas-liquid separator 20 may be used to separate gas and liquid of the refrigerant in a gas-liquid two-phase state coming from the external unit, so as to improve heating and cooling effects. The gas-liquid separator 20 has an inlet 210, a first outlet 220, and a second outlet 230, and the inlet 210 is adapted to be connected to an outdoor unit, so that the refrigerant introduced from the inlet 210 is discharged from the first outlet 220 and the second outlet 230, respectively, after being gas-liquid separated in the gas-liquid separator 20.

In the air conditioner working process, gas-liquid separator 20 can separate gas-liquid two-phase refrigerant for gaseous refrigerant flows out from the outlet duct, and liquid refrigerant flows out from the drain pipe, and gaseous refrigerant can heat the heating from the gas side flow to the indoor unit simultaneously, and on the contrary, liquid refrigerant flows to the indoor unit from the liquid side and refrigerates, and the control of different indoor units then realizes independent control through corresponding solenoid valve switching-over control etc.. In the following description of the present application, the separated gaseous refrigerant is discharged from the first outlet 220, and the liquid refrigerant is discharged from the second outlet 230, for example, in this case, the first outlet 220 is preferably disposed at the top of the gas-liquid separator 20, and the second outlet 230 is preferably disposed at the lower portion of the gas-liquid separator 20. Wherein, the inlet 210 may be in the form of a section of inlet pipe, and one end of the inlet pipe preferably extends into the gas-liquid separator 20 to achieve better gas-liquid separation effect.

One end of the heat exchanging part 40 is connected to the second outlet 231 of the gas-liquid separator 21. Therefore, the heat exchange component 40 is connected to the downstream of the liquid refrigerant outlet of the gas-liquid separator 20, the separated liquid refrigerant enters the heat exchange component 40, and the refrigerant flowing through the heat exchange component 40 can be effectively ensured to be completely liquid through the heat exchange and supercooling of the heat exchange component 40.

The plurality of first inner machine interface pipes 30 are spaced apart in a first direction (e.g., a length direction in fig. 6), and the first outlet 220 is connected to the plurality of first interfaces through the plurality of first inner machine interface pipes 30, respectively. The plurality of second inner machine interface pipes 50 are spaced apart in the above-described first direction, wherein the other end of the heat exchanging part 40 is connected to the plurality of second interfaces through the plurality of second inner machine interface pipes 50, respectively. Therefore, by arranging the first inner machine interface pipeline 30 and the second inner machine interface pipeline 50, after the inner machine is assembled in place with the first inner machine interface pipeline 30 and the second inner machine interface pipeline 50 of the switching device 100 through the first interface and the second interface, the circulating flow of the refrigerant among the inner machine, the first inner machine interface pipeline 30 and the second inner machine interface pipeline 50 can be realized, and the connection of the switching device 100 and the inner machine is facilitated. The plurality of first inner machine interface lines 30 and the plurality of second inner machine interface lines 50 are preferably evenly spaced in the first direction.

Wherein the second plurality of inner machine interface lines 50 and the first plurality of inner machine interface lines 30 are spaced apart in a second direction perpendicular to the first direction. Optionally, the first inner machine interface pipeline 30 and the corresponding second inner machine interface pipeline 50 (i.e. the same inner machine connected to the first inner machine interface pipeline 30) are in one-to-one correspondence in the second direction (e.g. the first inner machine interface pipeline 30 and the second inner machine interface pipeline 50 are directly over and under in the example of fig. 6). Thus, the first and second indoor

unit interface lines

30 and 50 connected to the indoor units are arranged in two layers, and the size of the switching device 100 in the first direction is relatively reduced.

Some (one or more) of the first and second pluralities of indoor

unit interface lines

30 and 50 are spaced apart from the remaining first and second indoor

unit interface lines

30 and 50 in the second direction. Therefore, the first indoor unit interface pipeline 30 and the second indoor unit interface pipeline 50 connected with the indoor units are respectively distributed into a plurality of layers, so that the size of the switching device 100 in the first direction can be further reduced, the whole switching device 100 is simple and compact in structure, and the installation position and the use occasion of the switching device 100 are expanded. The indoor units may respectively have a first interface and a second interface, the first indoor unit interface pipelines 30 correspond to the first interfaces one by one, and the second indoor unit interface pipelines 50 correspond to the second interfaces one by one.

For example, as shown in fig. 6, the first and second inner

machine interface pipes

30 and 50 each extend out of the side wall of the casing 10, and thus, the "first direction" may be a length direction of the casing 1 shown in fig. 6, and the "second direction" may be a height direction of the casing 10 shown in fig. 6. Thereby, the length of the whole switching device 100 in the length direction is effectively saved, and the number of the internal machines which can be connected by the switching device 100 is relatively expanded, for example, the switching device 100 according to the present invention can be connected with more than 6 internal machines (for example, in the example of fig. 6, the switching device 100 can be connected with 16 internal machines), thereby realizing the control of a plurality of rooms. Of course, the "first direction" may also be the length direction of the casing 10 shown in fig. 6, and the "second direction" may also be the width direction of the casing 10 shown in fig. 6, when the first internal machine interface pipeline 30 and the second internal machine interface pipeline 50 both extend out of the top wall of the casing 1; alternatively, the "first direction" may be inclined with respect to the longitudinal direction of the housing 10 shown in fig. 6. It is understood that the specific orientation of the "first direction" and the "second direction" may be specifically set according to the actual assembly requirement of the first inner machine interface pipeline 30 and the second inner machine interface pipeline 50, so as to better meet the actual application and installation position requirement.

According to the switching device 100 for the multi-split air conditioner of the embodiment of the invention, the first indoor unit interface pipeline 30 and the second indoor unit interface pipeline 50 which are suitable for being connected with the indoor units are arranged in multiple layers, so that the length of the switching device 100 in the first direction can be relatively reduced, and the use occasion and the installation position of the switching device 100 are not influenced. In addition, the gas-liquid separator 20 is provided to separate the refrigerant into gas and liquid, so that the state of the refrigerant and the noise of the multi-split air conditioner can be improved, and the heating or cooling of the multi-split air conditioner can be facilitated.

According to some embodiments of the present invention, the plurality of first inner machine interface pipelines 30 includes a plurality of layers spaced apart in the second direction, each layer of first inner machine interface pipelines 30 includes at least one first inner machine interface pipeline 30, the plurality of second inner machine interface pipelines 50 includes a plurality of layers spaced apart in the second direction, each layer of second inner machine interface pipelines 50 includes at least one second inner machine interface pipeline 50, and the plurality of layers of first inner machine interface pipelines 30 and the plurality of layers of second inner machine interface pipelines 50 are spaced apart in the second direction. Thereby, the length of the switching device 100 in the first direction can be reduced even further. Alternatively, the first inner machine interface pipelines 30 of the two adjacent layers are staggered along the first direction, and the second inner machine interface pipelines 50 of the two adjacent layers are staggered along the first direction. Thus, the first and second indoor

unit interface pipelines

30 and 50 can be arranged more compactly in the first direction, reducing the occupied space of the entire switching device 100, thereby further expanding the use occasion and installation position of the switching device 100.

For example, in the example of fig. 6, sixteen first inner machine interface pipelines 30 and sixteen second inner machine interface pipelines 50 are respectively provided, each of the first inner machine interface pipelines 30 and the second inner machine interface pipelines 50 includes two layers, each layer includes 8 first inner machine interface pipelines 30 or second inner machine interface pipelines 50 which are uniformly spaced in the length direction of the casing 10, the four layers of the first inner machine interface pipelines 30 and the second inner machine interface pipelines 50 are uniformly spaced in the height direction of the casing 1, a group of first inner machine interface pipelines 30 and second inner machine interface pipelines 50 which are connected with the same inner machine are opposite to each other up and down, the two layers of the first inner machine interface pipelines 30 are staggered in the length direction of the casing 10, the two layers of the second inner machine interface pipelines 50 are staggered in the length direction of the casing 10, so that the first inner machine interface pipelines 30 and the second inner machine interface pipelines 50 can be arranged more compactly in the length direction of the casing 10, the volume of the switching device 100 is reduced, and the occupied space of the switching device 100 is reduced.

According to some embodiments of the present invention, as shown in fig. 6 to 9, the switching device 100 for the multi-split air conditioner further includes: solenoid valve assembly 60, solenoid valve assembly 60 include first U type pipe 620, second U type pipe 630 and the multiunit valves 610 that arrange side by side, and from this, through arranging multiunit valves 610 side by side, whole solenoid valve assembly 60 is the modularized design for solenoid valve assembly 60's whole structural arrangement is orderly and compact.

Specifically, each group of electromagnetic valve sets 610 includes a first single-pass electromagnetic valve 6110 and a second single-pass electromagnetic valve 6120, which are used for controlling different flow directions of heating and cooling of the multi-split air conditioner, the first U-shaped pipe 620 is connected to the first outlet 220, the first U-shaped pipe 620 is respectively connected to the plurality of first indoor unit interface pipelines 30 through the plurality of first single-pass electromagnetic valves 6110, the first single-pass electromagnetic valve 6110 is configured to guide the refrigerant in the first U-shaped pipe 620 into the corresponding first indoor unit interface pipelines 30 in a single direction, the refrigerant in the first indoor unit interface pipeline 30 can not enter the first U-shaped pipe 620 through the first single-pass electromagnetic valve 6110, the plurality of first indoor unit interface pipelines 30 are respectively suitable for being connected with the outdoor unit through the plurality of second single-pass electromagnetic valves 6120, the second single-pass electromagnetic valve 6120 is constructed to be suitable for guiding the refrigerant in the first indoor unit interface pipeline 30 into the outdoor unit in a single direction, the refrigerant in the external unit cannot enter the first internal unit interface pipeline 30 through the second single-pass electromagnetic valve 6120. Therefore, the gaseous refrigerant separated from the gas-liquid separator 20 enters the first single-pass electromagnetic valve 6110 through the first U-shaped pipe 620, enters the inner machine through the first inner machine interface pipeline 30 to realize heating, and the refrigerant after heat exchange flows back to the outer machine through the second inner machine interface pipeline 50; when the multi-split air conditioner is used for cooling, the refrigerant flows to the indoor unit from the second indoor unit interface pipeline 50, then returns to the second U-shaped pipe 630 through the second single-pass electromagnetic valve 6120, and finally returns to the outdoor unit. The connection pipes (i.e. the first and second internal machine interface pipelines 30 and 50) of the whole electromagnetic valve assembly 60 connected with the internal machine can be arranged in a single-layer or multi-layer array distribution according to the size of the actual switching device 100, thereby balancing the size control between the length and the height of the switching device 100.

As shown in FIG. 1, one of the first U-shaped tube 620 and the second U-shaped tube 630 is positioned inside the other of the first U-shaped tube 620 and the second U-shaped tube 630. Therefore, the first U-shaped pipe 620 and the second U-shaped pipe 630 are arranged inside and outside, so that the connection with the multiple groups of solenoid valve groups 610 is facilitated, and the structure of the whole solenoid valve assembly 60 is more compact. Multiple sets of solenoid valve sets 610 may be located inside the first U-shaped tube 620 and the second U-shaped tube 630 and disposed near the bent portions of the first U-shaped tube 620 and the second U-shaped tube 630, and a first single-pass solenoid valve 6110 and a second single-pass solenoid valve 6120 in the multiple sets of solenoid valve sets 610 are respectively connected to the tube walls of the first U-shaped tube 620 and the second U-shaped tube 630 through pipelines.

Alternatively, the heat exchange member 40 is provided inside the first U-shaped tubes 620 and the second U-shaped tubes 630. As shown in fig. 6 to 8, the heat exchange member 40 is located between the ends of the first U-shaped tube 620 and the second U-shaped tube 630, and makes more sufficient and reasonable use of the space inside the casing 10.

One or more heat exchange members 40 may be provided. For example, referring to fig. 9, two heat exchange units 40 are disposed downstream of the gas-liquid separator 20 in sequence to achieve better heat exchange and subcooling. When there is one heat exchange unit 40, heat exchanging parts may be respectively provided at both side surfaces of the heat exchange unit 40, and the refrigerant may sequentially flow through the two heat exchanging parts, and at this time, the operation of the heat exchange unit 40 is substantially the same as that of the two heat exchange units 40 shown in fig. 9. Further, a throttling device 90 is disposed between the two heat exchanging parts 40, and the throttling device 90 may be a capillary tube or an electronic expansion valve, but is not limited thereto.

According to a further embodiment of the present invention, as shown in fig. 6, the switching device 100 for the multi-split air conditioner further includes: the check valve assembly 70 is arranged below the electromagnetic valve assembly 60, the check valve assembly 70 can be arranged between the electromagnetic valve assembly 60 and the water pan 2, and the check valve assembly 70 comprises a plurality of sets of check valve sets which extend horizontally and are arranged side by side, so that the height of the switching device 100 in the vertical direction can be effectively reduced by flattening the check valve assembly 70.

Specifically, each set of check valve group comprises a first check valve 710 and a second check valve 720 which are suitable for being connected in parallel between the heat exchange component 40 and the second indoor unit interface pipeline 50, the function of the check valve group is to control different flow directions of heating and cooling of the multi-split air conditioner, the first check valve 710 is suitable for guiding the refrigerant of the heat exchange component 40 to the indoor unit in a one-way mode, the refrigerant in the indoor unit cannot enter the heat exchange component 40 through the first check valve 710, the second check valve 720 is suitable for guiding the refrigerant of the indoor unit to the heat exchange component 40 in a one-way mode, and the heat exchange component 40 cannot enter the indoor unit through the second check valve 720. The entire check valve assembly 70 may be attached at the time of field installation. The connection pipe (i.e., the second indoor unit interface pipeline 50) of the whole check valve assembly 70 connected to the indoor unit can be arranged in a single-layer or multi-layer array distribution according to the size of the actual switching device 100, thereby balancing the size control between the length and the height of the switching device 100.

Optionally, the first one-way valve 710 and the second one-way valve 720 are arranged one above the other, as shown in fig. 6. Thereby, the size of the entire check valve assembly 70 in the length direction of the housing 10 can be reduced, so that the entire structure of the switching device 100 is more compact.

As shown in fig. 7 to 9, a pipeline connected between the second check valve 720 and the heat exchange component 40 has an extension section 80 extending out of the casing 10, one end of the first U-shaped tube 620 and one end of the second U-shaped tube 630 can respectively extend out of the casing 10, and when the number of internal machines to be connected is large, the one ends of the first U-shaped tubes 620, the one ends of the second U-shaped tubes 630, and the extension sections 80 of the plurality of switching devices 100 can be respectively connected in a one-to-one correspondence manner, so that the series connection of the plurality of switching devices 100 is realized, and the number of interfaces of the internal machines is conveniently increased.

According to some embodiments of the present invention, as shown in fig. 9, the gas-liquid separator 20 is adapted to be disposed adjacent to the outdoor unit, and the gas-liquid separator 20 is disposed at a side of the casing 1 close to the outdoor unit, and mainly functions to separate gas-liquid two-phase refrigerant entering from the outdoor unit, so that the gas-phase refrigerant is discharged from the heating side, and the liquid-phase refrigerant is discharged from the cooling side, thereby achieving better cooling and heating effects. The gas-liquid separator 20 is not limited to a vertical type or a horizontal type, and may be any device capable of performing a gas-liquid separation function.

According to some embodiments of the present invention, as shown in fig. 6 and 7, the housing 10 is substantially rectangular parallelepiped, the first direction is a length direction of the housing 10 shown in fig. 6, the gas-liquid separator 20, the heat exchanging part 40, the solenoid valve assembly 60 and the check valve assembly 70 are all disposed in the housing 10, the solenoid valve assembly 60 is disposed above the check valve assembly 70, the solenoid valve assembly 60 is preferably disposed directly above the check valve assembly 70 to further improve the compactness of the entire switching device 100, the solenoid valve assembly 60 and the check valve assembly 70 are disposed on one side (e.g., left side in fig. 6) of the length direction of the housing 10, in which case the solenoid valve assembly 60 and the check valve assembly 70 may be closely adjacent to the left side wall of the housing 10, the gas-liquid separator 20 and the heat exchanging part 40 are disposed on the other side (e.g., right side in fig. 6) of the length direction of the housing 10, and the gas-liquid separator 20 and the heat exchanging part 40 are sequentially arranged in a width direction of the housing 10, at this time, the gas-liquid separator 20 and the heat exchange member 40 may be closely adjacent to the right sidewall of the housing 10. Therefore, by adopting the arrangement mode, the structure of the whole switching device 100 is more compact, the occupied space of the switching device 100 is reduced, and the use occasion and the installation position of the switching device are not influenced.

According to some embodiments of the present invention, as shown in fig. 6 and 7, the housing 10 includes a top cover 120 detachably disposed on the top of the housing 10, so that maintenance and the like can be conveniently performed. Optionally, the housing 1 is a sheet metal part, but is not limited thereto.

Further, as shown in fig. 6, an electronic control box module 910 is arranged outside the housing 10, the electronic control box module 910 is vertically arranged, and the electronic control box module 910 is located on a side surface of the housing 10, for example, the electronic control box module 910 can be suspended on the side surface of the housing 10, and is not limited to be fixed on any side surface, as long as the whole electronic control box module 910 can be fixed, so that the electronic control box module 910 can realize a control function. The electronic control box assembly 910 may be connected to electronic control components, such as solenoid valves, etc., within the housing 10.

The switching device 100 for the multi-split air conditioner according to the embodiment of the present invention can realize independent control of refrigeration and heating of different internal machines, and the main principle and the realization manner are that the gas-liquid separator 20 separates gas-liquid two-phase refrigerant, so that the gas-phase refrigerant flows out from the first outlet 220 and flows from the gas side to the corresponding internal machine for heating and warming, the liquid-phase refrigerant flows out from the second outlet 230 and flows from the liquid side to the corresponding internal machine for refrigeration, and the control of different internal machines realizes independent control through reversing control of the corresponding solenoid valve assembly 60, etc.

Specifically, as shown in fig. 9, when part of the internal machines heats and cools, a first single-pass electromagnetic valve 6110 corresponding to the heating internal machine is opened (at this time, a second single-pass electromagnetic valve 6120 corresponding to the heating internal machine is closed), a second single-pass electromagnetic valve 6120 corresponding to the cooling internal machine is opened (at this time, a first single-pass electromagnetic valve 6110 corresponding to the cooling internal machine is closed), a refrigerant in the external machine firstly enters a gas-liquid separator 20 of the switching device 100 for gas-liquid separation, the separated gaseous refrigerant flows into the internal machine for heating after being discharged from the first outlet 220 and then sequentially flows through the first U-shaped pipe 620, the corresponding first single-pass electromagnetic valve 6110 and the first internal machine interface pipeline 30, and the heat-exchanged refrigerant returns to the external machine from the second U-shaped pipe 630 through the second one-way valve 720 via the second internal machine interface pipeline 50; the separated liquid refrigerant is discharged through the second outlet 230, and then flows through the heat exchange part 40, the throttling device 90, the heat exchange part 40, the first check valve 710, and the second indoor unit interface pipeline 50 in sequence, and then enters the indoor unit for refrigeration, and the refrigerant after heat exchange returns to the outdoor unit through the second single-pass electromagnetic valve 6120 and the second U-shaped pipe 630 via the first indoor unit interface pipeline 30.

According to the switching device 100 for the multi-split air conditioner, noise generated when a refrigerant flows through the heat exchange system can be effectively prevented from being transmitted to the base 1 through the water receiving disc 2, so that the noise of the air conditioner is greatly reduced, the use occasions and the installation positions of the air conditioner are enlarged, the comfort of the air conditioner is improved, and the switching device 100 is simple in structure, convenient to assemble and low in processing cost. In addition, the number of the inner machines which can be controlled by the outer machine of the whole multi-split air conditioner is increased, splicing among the plurality of switching devices 100 is reduced, the efficiency of field installation is improved, meanwhile, the whole switching devices 100 are hierarchical and modularized, and great convenience is provided for field maintenance. In addition, the switching device 100 may be disposed outside the external machine, thereby facilitating maintenance of the switching device 100 and various components inside the external machine.

The multi-split air conditioner according to the second aspect embodiment of the present invention includes the switching device 100 for the multi-split air conditioner according to the above-described first aspect embodiment of the present invention.

Other configurations and operations of the multi-split air conditioner according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A switching device for a multi-split air conditioner, comprising:

a base including a bottom wall and a side wall surrounding the bottom wall and extending upwardly from an edge of the bottom wall;

the water receiving tray is arranged in the base, and the bottom surface of the water receiving tray is vertically spaced from the bottom wall of the base;

the damping pads are arranged on the water receiving tray and are arranged at intervals along the circumferential direction of the water receiving tray;

the fixing pieces are arranged on the damping pads respectively and connected with the side walls of the base, and the fixing pieces are spaced from the water pan.

2. The switching device for a multi-split air conditioner according to claim 1, wherein each of the damping pads has a catching groove formed in a circumferential groove extending in a circumferential direction of the damping pad,

each of the fixing members includes:

the clamping groove penetrates through an opening of the groove part and is matched with the bottom of the groove part;

the connecting part is connected to one side of the clamping part, which is adjacent to the side wall of the base, and is connected with the side wall of the base.

3. The switching device for a multi-split air conditioner as claimed in claim 1 or 2, wherein at least one supporting vibration damping pad is provided on the bottom wall of the base, and the supporting vibration damping pad is located between a bottom surface of the water collector and the bottom wall of the base.

4. The switching device for a multi-split air conditioner according to claim 3, wherein the upper surface of the supporting vibration damping pad is formed with a blind hole concaved downward, the switching device further comprising:

and the positioning screw penetrates through the bottom wall of the base and the bottom wall of the blind hole from bottom to top so as to connect the support vibration damping pad on the base.

5. The switching device of claim 1, wherein a sponge member is disposed on a bottom surface of the water receiving tray.

6. The switching device for a multi-split air conditioner according to claim 1, wherein a vibration-proof rubber is provided on the bottom wall of the base.

7. The switching device for the multi-split air conditioner according to claim 1, wherein the multi-split air conditioner comprises an external unit, a plurality of internal units having a plurality of first interfaces and a plurality of second interfaces, the switching device further comprising:

the bottom of the shell is open, and the shell is arranged above the base;

8. The switching device for a multi-split air conditioner according to claim 7, further comprising:

the electromagnetic valve assembly comprises a plurality of groups of electromagnetic valve groups, a first U-shaped pipe and a second U-shaped pipe which are arranged side by side, each group of electromagnetic valve groups comprises a first one-way electromagnetic valve and a second one-way electromagnetic valve, the first U-shaped pipe is connected with the first outlet, the first U-shaped pipe is respectively connected with the plurality of first inner machine interface pipelines through the plurality of first one-way electromagnetic valves, the plurality of first inner machine interface pipelines are respectively suitable for being connected with the outer machine through the plurality of second one-way electromagnetic valves, the first one-way electromagnetic valve is configured to guide the refrigerant in the first U-shaped pipe into the corresponding first inner machine interface pipeline in a one-way mode, the second one-way solenoid valve is configured to be suitable for guiding the refrigerant in the first inner machine interface pipeline into the outer machine in a one-way mode, one of the first U-shaped pipe and the second U-shaped pipe is positioned at the inner side of the other one of the first U-shaped pipe and the second U-shaped pipe;

the check valve assembly is arranged below the electromagnetic valve assembly and comprises a plurality of groups of check valve sets which extend horizontally and are arranged side by side, each group of check valve sets comprises a first check valve and a second check valve which are suitable for being connected in parallel between the heat exchange component and the second indoor unit interface pipeline, the first check valve is suitable for guiding the refrigerant of the heat exchange component to the indoor unit in a one-way mode, and the second check valve is suitable for guiding the refrigerant of the indoor unit to the heat exchange component in a one-way mode.

9. The switching device for a multi-split air conditioner according to claim 8,

the housing is substantially in the shape of a rectangular parallelepiped, the first direction is a longitudinal direction of the housing,

the heat exchange component, the electromagnetic valve component and the one-way valve component are all arranged in the shell, the electromagnetic valve component is arranged above the one-way valve component, the electromagnetic valve component and the one-way valve component are positioned on one side of the length direction of the shell, the gas-liquid separator and the heat exchange component are arranged on the other side of the length direction of the shell, and the gas-liquid separator and the heat exchange component are sequentially arranged in the width direction of the shell,

an electric control box assembly is arranged outside the shell, and the electric control box assembly is vertically arranged and is located on the side face of the shell.

10. A multi-split air conditioner characterized by comprising the switching device for a multi-split air conditioner according to any one of claims 1 to 9.