Reversing valve and air conditioner

Abstract

The reversing valve comprises a valve body, a valve cavity is formed in the valve body, an air inlet hole and at least two pipe connecting holes are formed in the side wall of the valve body, and the pipe connecting holes are formed in the axial direction of the valve body at intervals; the driving assembly comprises a driving part and a driving shaft, the driving shaft is provided with a gear, and the power output end of the driving part is in driving connection with the driving shaft; the sliding part is arranged in the valve cavity and divides the valve cavity into a first valve chamber and a second valve chamber which are not communicated with each other, the first valve chamber is communicated with the air inlet hole, the sliding part is provided with a rack, and the rack extends in the axial direction of the valve body and is meshed with the gear, so that the sliding part is driven by the gear to move back and forth in the axial direction of the valve body; and then one pipe connecting hole is communicated with the air inlet hole through the first valve chamber, and the other pipe connecting holes are communicated with the second valve chamber. According to the design, movement of the sliding piece is not affected by suction and exhaust pressure of the compressor, the whole movement process is more reliable, and a more reliable reversing effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of switching valves, and particularly to a reversing valve and an air conditioner. Background Art

[0002] Existing reversing valves include three-way valves, four-way valves, etc., which are used to control the connection or disconnection of pipelines, so as to change the direction of fluid movement.

[0003] A reversing valve usually consists of a main valve and a pilot valve. The main valve includes a valve body, a valve seat and a slider. The valve seat is located inside the valve body and is connected to the valve body. One end of the slider abuts against the valve seat, and a pressure difference is provided by the pilot valve, so as to push the slider (sliding part) to move along the surface of the valve seat to achieve commutation. Since there is a certain demand for some small-load working conditions at present, in this working condition, the frequency of the compressor during operation is very low, even below 10 Hz. At this time, the suction and discharge pressures of the compressor are very low, even far lower than the minimum switching pressure difference of the reversing valve, which will cause the reversing valve to fail to switch reliably due to insufficient pressure difference. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a reversing valve that can commutate reliably without being affected by the compressor frequency.

[0005] The reversing valve provided by the present application includes: a valve body, inside which a valve cavity is formed. An air inlet hole and a connection pipe hole communicating with the valve cavity are provided on the side wall of the valve body. There are at least two connection pipe holes, which are arranged at intervals along the axial direction of the valve body; a driving assembly, including a driving member and a driving shaft. One end of the driving shaft is drivingly connected to the power output end of the driving member, and the other end of the driving shaft passes through the valve body and extends into the valve cavity. A gear is provided at the end of the driving shaft extending into the valve cavity; a sliding part, which is arranged in the valve cavity and can move along the axial direction of the valve body. The sliding part divides the valve cavity into a first valve chamber and a second valve chamber that do not communicate with each other. The first valve chamber is communicated with the air inlet hole, at least one of the connection pipe holes is communicated with the air inlet hole through the first valve chamber, and the other connection pipe holes are communicated with the second valve chamber. The sliding part is provided with a rack located in the first valve chamber. The rack extends along the axial direction of the valve body and meshes with the gear. The sliding part moves under the drive of the gear to switch different connection pipe holes to communicate with the first valve chamber.

[0006] In one embodiment, the peripheral wall of the valve body includes a first wall portion and a second wall portion arranged opposite to the first wall portion. The connection pipe holes are provided on the first wall portion. The sliding part is provided with a guiding part extending towards the second wall portion. The wall surface of the guiding part facing the second wall portion matches the inner side surface of the second wall portion and has a clearance fit.

[0007] In one embodiment, there are at least two of the guiding portions, which are arranged at intervals along the axial direction of the valve body.

[0008] In one embodiment, the guiding portion is integrally formed with the sliding member; and / or, the rack is integrally formed with the sliding member.

[0009] In one embodiment, there are two racks, which are arranged at intervals along the axial direction of the driving shaft, and the two racks are respectively located on both sides of the sliding member.

[0010] In one embodiment, a receiving channel for receiving the driving shaft is provided on the valve body. The receiving channel communicates with the valve cavity. A sealing ring is provided between the driving shaft and the inner wall of the receiving channel, and the sealing ring is sleeved around the driving shaft.

[0011] In one embodiment, defining the axial direction of the driving shaft as the first direction, the reversing valve further includes a limiting portion for limiting the driving shaft from moving relative to the receiving channel along the first direction toward the valve cavity. The limiting portion is located between the power output end of the driving member and the gear.

[0012] In one embodiment, the limiting portion is a positioning protrusion formed on the outer wall of the driving shaft. The positioning protrusion is located between the power output end of the driving member and the receiving channel. The receiving channel is provided in a pipeline, and the positioning protrusion contacts the corresponding end wall of the pipeline.

[0013] In one embodiment, a guiding frame is provided in the valve cavity. The guiding frame includes a guiding plate extending along the axial direction of the valve body, and an installation opening for installing the sliding member is formed on the guiding plate.

[0014] In one embodiment, pistons connected to the guiding plate are provided at both ends of the guiding plate, and through holes penetrating along the wall thickness direction of the pistons are formed on the pistons.

[0015] The present application further provides an air conditioner, which includes a compressor, a reversing valve, an indoor unit, and an outdoor unit. The reversing valve is the reversing valve described in any one of the above embodiments. There are three connection holes, namely a first connection hole, a second connection hole, and a third connection hole. Along the axial direction of the valve body, the second connection hole is located between the first connection hole and the third connection hole. The outlet of the compressor is communicated with the air inlet hole, and the inlet of the compressor is communicated with the second connection hole. The first interface of the indoor unit is communicated with the first connection hole, the second interface of the indoor unit is communicated with the first interface of the outdoor unit, and the second interface of the outdoor unit is communicated with the third connection hole. The sliding member has a first state and a second state. In the first state, the air inlet hole is communicated with the first connection hole through the first valve chamber, and the second connection hole is communicated with the third connection hole through the second valve chamber. In the second state, the air inlet hole is communicated with the third connection hole through the first valve chamber, and the first connection hole is communicated with the second connection hole through the second valve chamber.

[0016] It can be understood that the switching between the refrigeration mode and the heating mode is realized.

[0017] Compared with the prior art, in the reversing valve provided by the present application, the sliding member divides the valve cavity of the valve body into a first valve chamber and a second valve chamber. The air inlet hole is communicated with the first valve chamber. During the sliding process of the sliding member, fluid commutation is achieved by making one of the connection holes communicate with the first valve chamber and the other connection holes communicate with the second valve chamber. Since the sliding member realizes the purpose of moving along the axial direction of the valve body by meshing the rack on it with the gear of the driving component, the movement of the sliding member is not affected by the suction and exhaust pressures of the compressor, avoiding the problem that the movement of the sliding member cannot be realized due to the low required frequency of the compressor, resulting in the inability to reverse. The entire movement process is more reliable, achieving a more reliable commutation effect and better meeting the needs of users. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a perspective view of the reversing valve according to an embodiment of the present application;

[0020] Figure 2 It is a schematic structural diagram of the air conditioner according to an embodiment of the present application in the heating mode;

[0021] Figure 3The structural schematic diagram of an air conditioner in the refrigeration mode according to an embodiment of the present application;

[0022] Figure 4 is Figure 1 a cross-sectional view of the reversing valve shown;

[0023] Figure 5 is Figure 4 a partial enlarged view of part A in;

[0024] Figure 6 is Figure 1 a cross-sectional view of the reversing valve shown from another angle;

[0025] Figure 7 is Figure 1 a structural schematic diagram of the sliding member of the reversing valve shown;

[0026] Figure 8 is Figure 1 a structural schematic diagram of the drive shaft of the reversing valve shown;

[0027] Figure 9 a cross-sectional view of the reversing valve with a guide frame installed according to an embodiment of the present application;

[0028] Figure 10 a structural schematic diagram of the sliding member installed on the guide frame according to an embodiment of the present application.

[0029] Explanation of reference numerals is as follows: 1, valve body; 10, valve cavity; 10a, first cavity; 10b, second cavity; 10c, third cavity; 1a, main valve; 1b, first end cover; 1c, second end cover; 11, first wall portion; 12, main valve body; 11a, valve seat; 121, second wall portion; 13, accommodating passage; 14, return air pipe; 15, suction pipe; 16, intake pipe; 1211, intake hole; 111, first connecting pipe hole; 112, second connecting pipe hole; 113, third connecting pipe hole; 101, first valve chamber; 102, second valve chamber; 2, drive assembly; 21, drive member; 22, drive shaft; 221, positioning protrusion; 222, groove; 23, gear; 3, sliding member; 30, accommodating cavity; 31, rack; 32, guiding portion; 320, wall surface; 4, sealing ring; 5, guide frame; 51, guide plate; 511, mounting opening; 52, piston; 521, through hole; 6, compressor; 7, indoor unit; 8, outdoor unit; 9, mounting rack. Detailed implementation manners

[0030] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the specific embodiments of the present application in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0031] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present application, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the description of the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the description of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the description of the present application includes any and all combinations of one or more of the related listed items.

[0035] Please refer to Figures 1 to 10 , the present application provides a reversing valve, which is applied to an air conditioner.

[0036] AsFigures 1 to 5 As shown in the figure, the directional control valve includes a valve body 1, a driving assembly 2, and a sliding member 3. Among them, a valve chamber 10 is formed inside the valve body 1, and an air inlet hole 1211 and a connection hole are provided on the side wall of the valve body 1 and are connected to the valve chamber 10. There are multiple connection holes, and they are arranged at intervals along the axial direction of the valve body 1. The above-mentioned sliding member 3 is arranged in the valve chamber 10 and divides the valve chamber 10 into a non-communicating first valve chamber 101 and second valve chamber 102.

[0037] As Figure 2 shown in the figure, the peripheral wall of the valve body 1 includes a first wall portion 11 and a second wall portion 121 arranged opposite to the first wall portion 11. The above-mentioned air inlet hole 1211 is opened on the second wall portion 121 and is connected to the first valve chamber 101. In an embodiment, the above-mentioned sliding member 3 has a cavity 30 with an open end facing the first wall portion 11, and the first wall portion 11 covers the open end of the cavity 30 to jointly form the above-mentioned second valve chamber 102 with the sliding member 3. The above-mentioned connection holes are located on the first wall portion 11. Since the first wall portion 11 and the second wall portion 121 are arranged opposite to each other, the connection holes and the air inlet hole 1211 are arranged opposite to each other.

[0038] At least one connection hole is connected to the air inlet hole 1211 through the first valve chamber 101, and the remaining other connection holes are connected to the second valve chamber 102. As Figure 2 and Figure 3 shown in the figure, the sliding member 3 can move back and forth along the axial direction of the valve body 1 under the drive of the driving assembly 2 to switch different connection holes to be connected to the first valve chamber 101.

[0039] The directional control valve can be a three-way valve, a four-way valve, a five-way valve, a six-way valve, etc. In this application, mainly a four-way valve is taken as an example for detailed description, then there are three connection holes. The three connection holes are a first connection hole 111, a second connection hole 112, and a third connection hole 113 respectively. Along the axial direction of the valve body 1, the second connection hole 112 is located between the first connection hole 111 and the third connection hole 113.

[0040] The structure of the above-mentioned valve body 1 is referred to Figure 2 and Figure 3As shown, specifically, the valve body 1 includes a main valve 1a, a first end cover 1b, and a second end cover 1c. Both ends of the main valve 1a along the axial direction of the valve body 1 are open. The first end cover 1b is located at the open end of the main valve 1a and covers the opening. The second end cover 1c is located at the open end of the other end of the main valve 1a and covers the opening. In an embodiment, the first end cover 1b is close to the first connection hole 111, and the second end cover 1c is close to the third connection hole 113. The above-mentioned first wall portion 11 and the second wall portion 121 are both located on the main valve 1a. There are various structural forms of the main valve 1a. In an embodiment, the main valve 1a includes a main valve body 12 and a valve seat 11a. An opening is formed on the peripheral wall of the main valve body 12, and the second wall portion 121 is located on the main valve body 12. The valve seat 11a is installed at the opening and closes the opening. The valve seat 11a is a part of the above-mentioned first wall portion 11, and the above-mentioned connection holes are formed on the valve seat 11a. In another embodiment, the main valve 1a includes a main valve body and a valve seat provided in the inner cavity of the main valve body. The wall plate of the main valve body and the valve seat are correspondingly provided with the above-mentioned connection holes.

[0041] The above-mentioned sliding member 3 moves along the axial direction of the valve body 1 and has a first state and a second state. As Figure 2 shown, when the sliding member 3 is in the first state, the intake hole 1211 is connected to the first connection hole 111 through the first valve chamber 101, and the second connection hole 112 is connected to the third connection hole 113 through the second valve chamber 102. Specifically, both the second connection hole 112 and the third connection hole 113 are connected to the open end of the cavity 30. As Figure 3 shown, when the sliding member 3 is in the second state, the intake hole 1211 is connected to the third connection hole 113 through the first valve chamber 101, and the first connection hole 111 is connected to the second connection hole 112 through the second valve chamber 102. Specifically, both the first connection hole 111 and the second connection hole 112 are connected to the open end of the cavity 30. In addition, as Figure 2 shown, a return air pipe 14 is inserted into the first connection hole 111, a suction pipe 15 is inserted into the second connection hole 112, and an intake pipe 16 is inserted into the third connection hole 113.

[0042] An embodiment of the present application further provides an air conditioner, which includes a compressor 6, a reversing valve, an indoor unit 7, and an outdoor unit 8. The outlet of the compressor 6 is connected to the intake hole 1211, and the inlet of the compressor 6 is connected to the second connection hole 112 through the suction pipe 15. The first interface of the indoor unit 7 is connected to the first connection hole 111 through the return air pipe 14. The second interface of the indoor unit 7 is connected to the first interface of the outdoor unit 8. The second interface of the outdoor unit 8 is connected to the third connection hole 113 through the intake pipe 16. Thus, when the above-mentioned sliding member 3 is in the first state, the air conditioner is in the heating mode, and when the above-mentioned sliding member 3 is in the second state, the air conditioner is in the cooling mode.

[0043] For the structure of the driving component 2 that realizes the movement of the sliding part, refer to Figure 5 As shown in the figure. Specifically, the driving component 2 includes a driving part 21 and a driving shaft 22. One end of the driving shaft 22 is drivingly connected to the power output end of the driving part 21, and the other end of the driving shaft 22 passes through the valve body 1 and extends into the valve cavity 10. A gear 23 is provided at the end of the driving shaft 22 extending into the valve cavity 10. The power output end of the driving part 21 is drivingly connected to the driving shaft 22 to drive the gear 23 to rotate around the axis of the driving shaft 22. In an embodiment, the driving part 21 is a motor, and the motor is installed on the outer wall surface of the valve body 1 through a mounting bracket 9. The driving shaft 22 is located between the intake hole 1211 and the second connection hole 112. The sliding part 3 is provided with a rack 31 located in the first valve chamber 101. The aforementioned rack 31 extends along the axial direction of the valve body 1 and meshes with the gear 23. Thus, during the rotation of the gear 23 driven by the driving part 21, the rack 31 will be driven to move along the axial direction of the valve body 1. It should be noted that when the gear 23 drives the rack 31 to move, the axis of the gear 23 and the movement direction of the rack 31 must be substantially perpendicular.

[0044] Since the rack 31 on the sliding part 3 meshes with the gear 23 of the driving component 2, under the drive of the driving part 21, the sliding part 3 moves along the axial direction of the valve body 1, that is, the movement of the sliding part 3 is not affected by the suction and exhaust pressures of the compressor 6, avoiding the problem that the sliding part 3 cannot be driven to move due to the low required frequency of the compressor 6, resulting in the inability to reverse. The entire movement process is more reliable, achieving a more reliable reversing effect and better meeting the needs of users.

[0045] In this embodiment, as Figure 5 shown, there are two racks 31, which are arranged at intervals along the axial direction of the driving shaft 22. The two racks 31 are respectively located on both sides of the sliding part 3. In this way, when installing the sliding part 3, it is only necessary to place the sliding part 3 in the valve cavity 10, without deliberately choosing to orient the side where the rack 31 is located towards the gear 23. The installation is convenient and fast, avoiding assembly mistakes.

[0046] In order to guide the movement of the sliding part 3, as Figure 3 and Figure 6 shown, the sliding part 3 is provided with a guiding part 32 extending towards the second wall part 121. The wall surface 320 of the guiding part 32 facing the second wall part 121 matches and has a clearance fit with the inner side surface of the second wall part 121. "Matches" means having the same shape. In this application, the inner side surface of the second wall part 121 is an arc surface, and the wall surface 320 of the guiding part 32 is also an arc surface, and the bending shape is the same as that of the inner side surface of the second wall part 121.

[0047] There are at least two guide portions 32, which are arranged at intervals along the axial direction of the valve body 1. In this embodiment, there are two guide portions 32. In other embodiments, there may be three or more guide portions 32. Figure 5 and Figure 7 As shown in and , in one embodiment, the guide portion 32 is integrally formed with the sliding member 3. In another embodiment, the rack 31 is integrally formed with the sliding member 3. In one embodiment, the guide portion 32 and the rack 31 are integrally formed with the sliding member 3. In this embodiment, the guide portion 32 and the rack 31 are integrally formed on the sliding member 3 by injection molding. In this way, there is no need to install the rack and the guide portion separately, which improves the assembly efficiency. Along the axial direction of the drive shaft 22, the guide portion 32 is located between the two racks 31. In another embodiment, the guide portion 32 may not be provided.

[0048] In order to protect the drive shaft 22, Figure 5 As shown, the valve body 1 is provided with a receiving channel 13 for receiving the drive shaft 22, the receiving channel 13 is connected to the valve cavity 10, and a sealing ring 4 is provided between the drive shaft 22 and the inner wall of the receiving channel 13, and the sealing ring 4 is sleeved on the periphery of the drive shaft 22 to form a seal between the drive shaft 22 and the inner wall of the receiving channel 13. The existence of the sealing ring 4 ensures the sealing of the valve cavity and prevents the fluid from flowing out of the receiving channel 13. Figure 8 As shown, a groove 222 extending along the circumference of the driving shaft 22 is formed on the outer peripheral wall of the driving shaft 22 , and the sealing ring 4 is arranged in the groove 222 .

[0049] The accommodating channel 13 is arranged in a pipe, and the pipe can be directly formed on the valve body 1 or welded to the valve body 1. In addition, a connecting structure can be used to install the pipe with the accommodating channel 13 on the valve body 1.

[0050] like Figure 1 and Figure 5 As shown, the axial direction of the drive shaft 22 is defined as the first direction X, and the axial direction of the valve body 1 is defined as the second direction Y, and the first direction X is substantially perpendicular to the second direction Y. It should be noted that "substantially perpendicular" includes but is not limited to completely perpendicular, and there may be a small deviation. The reversing valve also includes a limiting portion that limits the movement of the drive shaft 22 relative to the accommodating channel 13 along the first direction X toward the valve cavity 10, and the limiting portion is located between the power output end of the driving member 21 and the gear 23. The existence of the limiting portion avoids relative shaking and interference between the rack and the gear, and then avoids greater friction and impact between the rack and the gear. At this time, the meshing of the rack and the gear is more stable, so that the subsequent movement of the sliding member is smoother.

[0051] In one embodiment, if Figure 5 and Figure 8As shown, the limiting portion is a positioning projection 221 formed on the outer wall of the drive shaft 22 and extending along the circumferential direction of the drive shaft 22. The positioning projection 221 is located between the power output end of the driving member 21 and the accommodating channel 13, and contacts the corresponding end wall of the pipe forming the accommodating channel 13. In another embodiment, the limiting portion may also be a convex portion formed on the outer peripheral wall of the drive shaft 22. There are at least two convex portions, and they are arranged at intervals along the circumferential direction of the drive shaft 22. The convex portions are located between the power output end of the driving member 21 and the accommodating channel 13. Additionally, in one embodiment, it may also be adopted that: the inner peripheral wall of the accommodating channel 13 is provided with a limiting groove extending along the first direction X at the position corresponding to the convex portion or the positioning projection 221. The end face of the limiting groove close to the gear 23 contacts the corresponding convex portion or the positioning projection to limit the further movement of the drive shaft 22 towards the valve cavity 10.

[0052] In the above embodiment, due to the absence of a guide frame in the valve cavity 10, the length of the valve body 1 can be shortened, and the first end cover 1b and the second end cover 1c completely seal the main valve 1a. In addition, the above reversing valve does not need to be provided with a pilot valve, a capillary tube, etc., and can more reliably achieve the switching between the refrigeration or heating mode.

[0053] In some embodiments, as Figure 9 and Figure 10 shown, the reversing valve further includes a guide frame 5, and the guide frame 5 is arranged in the valve cavity 10. The guide frame 5 includes a guide plate 51 extending along the second direction Y. Both ends of the guide plate 51 are provided with pistons 52 perpendicular to the guide plate 51. Then, there are two pistons, and they are arranged at intervals along the axial direction of the valve body. The above sliding member 3 is located in the space enclosed by the guide plate 51 and the pistons 52. In order to better position the sliding member 3, the guide plate 51 has an installation opening 511 for installing the sliding member 3.

[0054] The above two pistons 52 can divide the valve cavity 10 into a first cavity 10a, a second cavity 10b, and a third cavity 10c arranged in sequence along the axial direction of the valve body 1. Among them, the main valve 1a, the first end cover 1b, and the piston 52 adjacent to the first end cover 1b together enclose the first cavity 10a. The main valve 1a, the second end cover 1c, and the piston 52 adjacent to the second end cover 1c together enclose the third cavity 10c. The above first valve chamber 101 and the second valve chamber 102 are located in the second cavity 10b. In order to balance the pressures in the first cavity 10a, the second cavity 10b, and the third cavity 10c, through holes 521 penetrating along the wall thickness of the pistons 52 are provided. The working principle in this embodiment is the same as that in Figure 3 this embodiment. Figure 9 The piston 52 in is only exemplary, and this piston 52 only guides the sliding member together with the guide plate 51. In addition, only the guide plate 51 with a guiding function can be retained, and the piston 52 and the connection structure between the guide plate 51 and the piston 52 can be cancelled.

[0055] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0056] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A reversing valve, characterized in that, Comprising: A valve body (1) with a valve cavity (10) formed inside. An air inlet hole (1211) communicating with the valve cavity (10) and a connection pipe hole are provided on the side wall of the valve body (1). There are multiple connection pipe holes, which are arranged at intervals along the axial direction of the valve body (1); A driving assembly (2), including a driving member (21) and a driving shaft (22). One end of the driving shaft (22) is drivingly connected to the power output end of the driving member (21), and the other end of the driving shaft (22) passes through the valve body (1) and extends into the valve cavity (10). A gear (23) is provided at the end of the driving shaft (22) extending into the valve cavity (10); A sliding member (3) is arranged in the valve cavity (10) and can move along the axial direction of the valve body (1). The sliding member (3) divides the valve cavity (10) into a non-communicating first valve chamber (101) and a second valve chamber (102). The first valve chamber (101) is communicated with the air inlet hole (1211). At least one of the connection pipe holes is communicated with the air inlet hole (1211) through the first valve chamber (101), and the other connection pipe holes are communicated with the second valve chamber (102). The sliding member (3) is provided with a rack (31) located in the first valve chamber (101). The rack (31) extends along the axial direction of the valve body (1) and meshes with the gear (23). The sliding member (3) moves under the drive of the gear (23) to switch different connection pipe holes to be communicated with the first valve chamber (101).

2. The directional control valve according to claim 1, wherein, The peripheral wall of the valve body (1) includes a first wall portion (11) and a second wall portion (121) arranged opposite to the first wall portion (11). The connection pipe holes are provided on the first wall portion (11). The sliding member (3) is provided with a guiding portion (32) extending towards the second wall portion (121). The wall surface (320) of the guiding portion (32) facing the second wall portion (121) matches the inner side surface of the second wall portion (121) and has a clearance fit.

3. The reversing valve according to claim 2, characterized in that, There are at least two guiding portions (32), which are arranged at intervals along the axial direction of the valve body (1).

4. The reversing valve according to claim 2, characterized in that, The guiding portion (32) is integrally formed with the sliding member (3); and / or, the rack (31) is integrally formed with the sliding member (3).

5. The reversing valve according to claim 2, characterized in that, There are two racks (31), which are arranged at intervals along the axial direction of the driving shaft (22). The two racks (31) are respectively located on both sides of the sliding member (3).

6. The reversing valve according to claim 1, wherein, A receiving channel (13) for receiving the driving shaft (22) is provided on the valve body (1). The receiving channel (13) is communicated with the valve cavity (10). A sealing ring (4) is provided between the driving shaft (22) and the inner wall of the receiving channel (13). The sealing ring (4) is sleeved around the driving shaft (22).

7. The reversing valve according to claim 6, characterized in that, The axial direction of the drive shaft (22) is defined as a first direction, and the reversing valve also includes a limiting portion for limiting the movement of the drive shaft (22) relative to the accommodating channel (13) toward the valve cavity (10) along the first direction, and the limiting portion is located between the power output end of the drive member (21) and the gear (23).

8. The reversing valve according to claim 7, characterized in that, The limiting portion is a positioning protrusion (221) formed on the outer wall of the driving shaft (22), the positioning protrusion (221) is located between the power output end of the driving member (21) and the accommodating channel (13), the accommodating channel (13) is arranged in a pipe, and the positioning protrusion (221) contacts the corresponding end wall of the pipe.

9. The reversing valve according to claim 1, characterized in that, A guide frame (5) is arranged in the valve cavity (10), and the guide frame (5) comprises a guide plate (51) extending along the axial direction of the valve body (1), and a mounting opening (511) for mounting the sliding member (3) is provided on the guide plate (51).

10. The reversing valve according to claim 9, characterized in that, Both ends of the guide plate (51) are provided with pistons (52) connected to the guide plate (51), and the piston (52) is provided with a through hole (521) penetrating along the wall thickness direction thereof.

11. An air conditioner, comprising a compressor (6), a reversing valve, an indoor unit (7) and an outdoor unit (8), characterized in that, The reversing valve is a reversing valve according to any one of claims 1 to 10, the number of the connecting holes being three, namely a first connecting hole (111), a second connecting hole (112) and a third connecting hole (113), along the axial direction of the valve body (1), the second connecting hole (112) is located between the first connecting hole (111) and the third connecting hole (113), the outlet of the compressor (6) is connected to the air inlet hole (1211), and the inlet of the compressor (6) is connected to the second connecting hole (112), the first interface of the indoor unit (7) is connected to the first connecting hole (111), and the second interface of the indoor unit (7) is connected to the first connecting hole (111) of the outdoor unit (8). An interface is connected, a second interface of the outdoor unit (8) is connected to the third connecting hole (113), and the sliding member (3) has a first state and a second state. In the first state, the air inlet hole (1211) is connected to the first connecting hole (111) through the first valve chamber (101), and the second connecting hole (112) is connected to the third connecting hole (113) through the second valve chamber (102); in the second state, the air inlet hole (1211) is connected to the third connecting hole (113) through the first valve chamber (101), and the first connecting hole (111) is connected to the second connecting hole (112) through the second valve chamber (102).

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