Directional valve

Abstract

The present invention provides a reversing valve, comprising a valve body and a valve core rotatably mounted inside the valve body, the valve body is provided with a plurality of passages, the rotating valve core can selectively connect at least two of the plurality of passages, the valve body is provided with a first chamber and a second chamber separated from each other, and the plurality of passages are all connected to the second chamber. The reversing valve also comprises: a cavity partition, which is arranged in the first chamber and fixedly connected to the valve body to separate a control chamber in the first chamber; a driving part is arranged in the control chamber and fixedly connected to the valve core, and the driving part drives the valve core to rotate according to the pressure difference in the control chamber. The driving part can realize rotation through the pressure difference inside the control chamber, and then drive the valve core to rotate, so as to realize the switching of the reversing valve, and the response to pressure is more sensitive, thus avoiding the problem that the existing reversing valve using pneumatic drive is not sensitive enough.

Description

Technical Field

[0001] The present invention relates to the technical field of reversing valve equipment, and in particular to a reversing valve. Background Art

[0002] The four-way reversing valve is a commonly used reversing valve component in heat pump air conditioners. It achieves cooling in summer and heating in winter by changing the direction of the compressor exhaust and return air.

[0003] At present, most piston-type four-way reversing valves use pneumatic control of the piston, which means that they must rely on the gas pressure of the air conditioner to work. However, the current pneumatic drive method is not sensitive enough, which affects the accuracy of the reversing of the reversing valve. Summary of the invention

[0004] The main purpose of the present invention is to provide a reversing valve to solve the problem that the reversing valve driven by pneumatic drive in the prior art is not sensitive enough.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a reversing valve, including a valve body and a valve core rotatably installed inside the valve body, a plurality of passages are arranged on the valve body, and rotating the valve core can selectively connect at least two of the plurality of passages, a first chamber and a second chamber separated from each other are arranged inside the valve body, and the plurality of passages are all connected to the second chamber. The reversing valve also includes: a cavity partition part, which is arranged in the first chamber and fixedly connected to the valve body to separate a control chamber in the first chamber; a driving part is arranged in the control chamber and fixedly connected to the valve core, and the driving part drives the valve core to rotate according to the pressure difference in the control chamber.

[0006] Furthermore, the driving part includes a driving plate, which is fixed to the end of the valve core. The driving plate is rotatably arranged in the control chamber and divides the control chamber into a first pressure chamber and a second pressure chamber. The rotation axis of the driving plate is coaxial with the valve core.

[0007] Furthermore, at least two control channels are provided on the valve body, and the at least two control channels are respectively connected to the first pressure chamber and the second pressure chamber.

[0008] Furthermore, the valve core also includes: a middle diaphragm, which is perpendicular to the axis of the valve body and matched with the inner wall of the valve body to separate the interior of the valve body into a first chamber and a second chamber.

[0009] Furthermore, the cavity partition is fixed on the inner end wall of the valve body on the side close to the driving plate, and abuts against the middle partition plate to separate the control cavity in the first cavity.

[0010] Furthermore, the cavity partition is fixed on the inner side wall of the valve body close to the first chamber, and abuts against the middle partition plate and the inner end wall of the valve body close to the driving plate to separate a control chamber in the first chamber.

[0011] Furthermore, the cavity partition portion includes a partition plate, and the partition plate is bent at a preset angle along a direction parallel to the axis of the valve core to form a first plate segment and a second plate segment.

[0012] Furthermore, a first lug structure is provided on the first plate segment, a second lug structure is provided on the second plate segment, and the partition is connected to the inner end wall or the inner side wall of the valve body through the first lug structure and the second lug structure.

[0013] Furthermore, the cavity partition also includes a first sealing ring, a first groove is provided on the circumferential edge of the partition, and the first sealing ring is sleeved in the first groove.

[0014] Furthermore, the reversing valve also includes a second sealing ring, a circumferential edge of the driving plate is provided with a second groove, and the second sealing ring is sleeved in the second groove.

[0015] Furthermore, the valve body includes a main body and a first end cover and a second end cover installed at both ends of the main body. A pivot boss is arranged on the top of the driving plate. The pivot boss is coaxial with the valve core and is pivotally connected to the first end cover.

[0016] Furthermore, the cavity partition also includes a plurality of limiting columns, and the plurality of limiting columns are respectively arranged on a side of the first plate segment close to the control cavity and a side of the second plate segment close to the control cavity.

[0017] Furthermore, the limiting column is a rubber column.

[0018] Furthermore, the cavity partition part includes a spacer block, which is a fan-shaped block, fills the first cavity and forms a control cavity in the first cavity, and the end of the spacer block forms a first surface and a second surface.

[0019] By applying the technical solution of the present invention, the valve body of the reversing valve of the present invention comprises a first chamber and a second chamber, wherein the second chamber is used to cooperate with the valve core to connect two of the multiple passages. In order to realize the rotation switching of the valve core and achieve the purpose of selectively connecting at least two of the multiple passages, a control chamber is separated in the first chamber by a chamber partition, and a driving part is fixed at the end of the valve core. The driving part can rotate by controlling the pressure difference inside the chamber, thereby driving the valve core to rotate, realizing the switching of the reversing valve, and being more sensitive to pressure, thereby avoiding the problem of insufficient switching sensitivity of the existing reversing valve using pneumatic drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A cross-sectional view schematically shows an embodiment of a reversing valve of the present invention;

[0022] Figure 2 A schematic diagram showing the structure of an embodiment of the interior of the first chamber of the reversing valve of the present invention;

[0023] Figure 3 The structure diagram of the embodiment of the first end cover and the cavity partition part of the present invention is schematically shown;

[0024] Figure 4 A schematic diagram showing a structure of an embodiment of a driving plate of the present invention;

[0025] Figure 5 The structure diagram of the embodiment of the valve core and the driving plate of the present invention is schematically shown;

[0026] Figure 6 A cross-sectional view schematically shows an embodiment of a valve core and a drive plate of the present invention;

[0027] Figure 7 An exploded view of an embodiment of a reversing valve of the present invention is schematically shown;

[0028] Figure 8 A piping control diagram of an embodiment of the first chamber of the present invention is schematically shown;

[0029] The above drawings include the following reference numerals:

[0030] 10. Valve body; 11. Passage; 12. First pressure chamber; 13. Second pressure chamber; 14. First chamber; 15. Second chamber; 16. Control channel; 20. Valve core; 30. Drive plate; 31. Second groove; 32. Pivot boss; 40. Middle partition plate; 50. Cavity partition; 51. First plate section; 52. Second plate section; 53. First lug structure; 54. Second lug structure; 55. First groove; 60. First end cover; 61. Second end cover; 62. Main body; 70. Limit column; 80. Four-way valve guide valve. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] As described in the background technology, the four-way reversing valve is a commonly used reversing valve component in heat pump air conditioners. It achieves cooling in summer and heating in winter by changing the direction of the exhaust and return air of the compressor. At present, most piston-type four-way reversing valves use pneumatic control of the piston, which means that they must rely on the gas pressure of the air conditioner to work. However, the current pneumatic drive method is not sensitive enough, which affects the accuracy of the reversing of the reversing valve.

[0033] See also Figures 1 to 8As shown, an embodiment of the present invention provides a reversing valve, including a valve body 10 and a valve core 20 rotatably mounted inside the valve body 10, a plurality of passages 11 are arranged on the valve body 10, and the rotating valve core 20 can selectively connect at least two of the plurality of passages 11, a first chamber 14 and a second chamber 15 separated from each other are arranged inside the valve body 10, and the plurality of passages 11 are all connected to the second chamber 15, and the reversing valve also includes: a cavity partition part 50, which is arranged in the first chamber 14 and fixedly connected to the valve body 10 to separate a control chamber in the first chamber 14; a driving part, which is arranged in the control chamber and fixedly connected to the valve core 20, and the driving part drives the valve core 20 to rotate according to the pressure difference in the control chamber. The valve body of the reversing valve of the present invention comprises a first chamber and a second chamber, wherein the second chamber is used to cooperate with the valve core to connect two of the multiple passages. In order to realize the rotation switching of the valve core and achieve the purpose of selectively connecting at least two of the multiple passages, a control chamber is separated in the first chamber by a chamber partition, and a driving part is fixed at the end of the valve core. The driving part can rotate by controlling the pressure difference inside the chamber, thereby driving the valve core to rotate, realizing the switching of the reversing valve, and responding more sensitively to pressure, thereby avoiding the problem of insufficient switching sensitivity of the existing reversing valve using pneumatic drive.

[0034] Specifically, the driving part includes a driving plate 30, which is fixed to the end of the valve core. The driving plate 30 is rotatably arranged in the control chamber, and the control chamber is divided into a first pressure chamber 12 and a second pressure chamber 13. The rotation axis of the driving plate 30 is coaxial with the valve core 20. The control chamber is divided into a first pressure chamber and a second pressure chamber. By connecting the first pressure chamber and the second pressure chamber to access the fluid, a relatively high pressure and a low pressure are generated in the first pressure chamber and the second pressure chamber respectively, thereby driving the driving plate to rotate, and driving the valve core to rotate, so as to realize the reversing function. Since the volume of the first pressure chamber and the second pressure chamber is small, after the fluid is introduced into the first pressure chamber and the second pressure chamber, the reaction to the pressure is more sensitive, thereby avoiding the problem that the existing reversing valve using pneumatic drive is not sensitive enough.

[0035] See also Figure 8 As shown, the fluid introduced into the first pressure chamber and the second pressure chamber can be hydraulic oil or gas. In a preferred embodiment, the first pressure chamber and the second pressure chamber are two fan-shaped areas surrounded by the valve body, the chamber partition, and the drive plate. The first pressure chamber and the second pressure chamber are respectively connected to the E pipe and the C pipe of the four-way valve pilot valve, and the D pipe and the S pipe of the four-way valve pilot valve 80 are respectively connected to the exhaust pipe and the intake pipe of the air conditioning compressor. As for the pressure, the exhaust pressure and the intake pressure of the air conditioning system can be used.

[0036] In order to form a pressure difference in the control chamber, at least two control channels 16 are further provided on the valve body 10 in this embodiment, and the at least two control channels 16 are respectively connected to the first pressure chamber 12 and the second pressure chamber 13. Fluid is introduced through the control channels 16 connected to the first pressure chamber and the second pressure chamber, and relatively high pressure and low pressure are generated in the first pressure chamber and the second pressure chamber respectively, thereby driving the driving plate to rotate and driving the valve core to rotate, thereby realizing the reversing function.

[0037] Specifically, the valve core 20 includes a middle partition 40, a lower partition and a partition plate arranged between the middle partition 40 and the lower partition, and the partition plate divides the second chamber 15 of the valve body into two chambers that are not connected to each other, and at least one of the two chambers can be connected to two passages at the same time. In order to separate the first chamber and the second chamber in the valve body and prevent the fluid in the first chamber from entering the second chamber, the middle partition plate 40 of the reversing valve in this embodiment is perpendicular to the axis of the valve body 10 and is adapted to the inner wall of the valve body 10 to divide the inside of the valve body 10 into the first chamber 14 and the second chamber 15, wherein the valve body 10 includes a body and a first end cover 60 and a second end cover 61 installed at both ends of the body 62.

[0038] Specifically, in order to ensure the closedness of the control chamber, the chamber partition 50 in this embodiment is fixed on the inner end wall of the valve body 10 on the side close to the driving plate 30, that is, on the first end cover 60, and abuts against the middle partition plate 40 to separate the control chamber in the first chamber 14. Alternatively, the chamber partition 50 is fixed on the inner side wall of the valve body 10, and abuts against the middle partition plate 40 and the inner end wall of the first end cover 60 of the valve body 10 to separate the control chamber in the first chamber 14.

[0039] The cavity partition 50 in this embodiment includes a partition, which is bent at a preset angle along a direction parallel to the axis of the valve core 20 to form a first plate segment 51 and a second plate segment 52. The preset angle is between 150° and 100°, preferably 120°, so that the drive plate has a sufficient swing angle to realize the operation of the valve core. In this embodiment, the swing angle of the drive plate is 90°. In other embodiments, the partition may not be bent. The partition may be a metal plate or a non-metal plate.

[0040] In another embodiment, the cavity partition includes a spacer block, which is a fan-shaped block, fills the first cavity and forms a control cavity in the first cavity, and the end of the spacer block forms a first surface and a second surface. The angle between the first surface and the second surface is between 150° and 100°, preferably 120°, so that the drive plate has a sufficient swing angle to realize the operation of the valve core. In this embodiment, the swing angle of the drive plate is 90°.

[0041] In order to stably fix the partition on the valve body, a first lug structure 53 is provided on the first plate section 51 of the present embodiment, and a second lug structure 54 is provided on the second plate section 52. The partition is connected to the inner end wall or the inner side wall of the valve body 10 through the first lug structure 53 and the second lug structure 54. The lug structure is provided with a connection hole inside, through which a screw can be inserted, and the lug structure is fixed to the valve body through the screw and the lug structure. In other embodiments, rivets can be used to pass through the lug structure for connection. In a preferred embodiment, after the connection is made by screws or rivets, the lug and the inner end wall of the valve body are further connected by gluing or welding to ensure the connection stability.

[0042] In order to ensure the sealing of the control cavity, the cavity partition 50 in this embodiment also includes a first sealing ring. The circumferential edge of the partition is provided with a first groove 55, and the first sealing ring is sleeved in the first groove 55. The cross section of the first groove is square, and can also be wedge-shaped, V-shaped, circular, etc. The sealing ring is preferably a rubber O-ring, and the size must be sufficient to be installed on the partition, and have a certain pre-tightening force so as not to fall off. It can also be a sealing ring of other materials and other cross-sectional shapes.

[0043] In order to prevent the fluids in the first pressure chamber and the second pressure chamber from cross-talking through the drive plate, the reversing valve in this embodiment further includes a second sealing ring. A second groove 31 is provided on the circumferential edge of the drive plate 30, and the second sealing ring is sleeved in the second groove. The cross section of the second groove is square, or it can be wedge-shaped, V-shaped, circular, etc. The sealing ring is preferably a rubber O-ring, the size of which must be sufficient to be installed on the drive plate, with a certain pre-tightening force so as not to fall off, and it can also be a sealing ring of other materials and other cross-sectional shapes.

[0044] Among them, the valve body 10 in this embodiment includes a main body and a first end cover 60 and a second end cover installed at both ends of the main body. A pivot boss 32 is provided on the top of the driving plate 30. The pivot boss is coaxial with the valve core 20 and is pivotally connected to the first end cover 60.

[0045] In order to prevent collision between the driving plate and the partition plate, the cavity partition portion 50 in this embodiment also includes a plurality of limiting columns 70, which are respectively arranged on the side of the first plate segment 51 close to the control cavity and the side of the second plate segment 52 close to the control cavity. The movement of the driving plate is limited by the limiting columns, thereby preventing collision between the driving plate and the partition plate.

[0046] In order to prevent the driving plate from colliding with the partition plate and generating noise, the limiting column in this embodiment is a rubber column.

[0047] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0048] The valve body of the reversing valve of the present invention comprises a first chamber and a second chamber, wherein the second chamber is used to cooperate with the valve core to connect two of the multiple passages. In order to realize the rotation switching of the valve core and achieve the purpose of selectively connecting at least two of the multiple passages, a control chamber is separated in the first chamber by a chamber partition, and a driving part is fixed at the end of the valve core. The driving part can rotate by controlling the pressure difference inside the chamber, thereby driving the valve core to rotate, realizing the switching of the reversing valve, and responding more sensitively to pressure, thereby avoiding the problem of insufficient switching sensitivity of the existing reversing valve using pneumatic drive.

[0049] It should be noted that the above detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0052] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0053] For ease of description, spatially relative terms such as "on", "above", "on the upper surface of", "upper", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figures. It should be understood that the spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures.

[0054] For example, if a device in a drawing is inverted, a device described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can encompass both "above" and "below." The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0055] In the above detailed description, reference is made to the accompanying drawings, which form a part of this document. In the accompanying drawings, similar symbols typically identify similar components unless the context indicates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be used, and other changes may be made, without departing from the spirit or scope of the subject matter presented herein. It will be readily understood that aspects of the present disclosure, as generally described herein and illustrated in the accompanying drawings, may be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are expressly contemplated herein.

[0056] The disclosure of the specific embodiments described in this application will not be limited, and it is intended to be illustrated as various aspects. As will be clear to those skilled in the art, many modifications and changes can be made without departing from the spirit and scope of the disclosure. Within the scope of the present disclosure, functionally equivalent methods and devices, in addition to those listed herein, will be clear to those skilled in the art from the foregoing description. Such modifications and changes are intended to fall within the scope of the appended claims. The disclosure will only be limited by the terms of the appended claims and the full scope of equivalents to which such claims are entitled. It will be understood that the disclosure is not limited to specific methods, reagents, compounds, compositions or biological systems, which can certainly vary. It will also be understood that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to be restrictive.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A reversing valve, characterized in that: The invention comprises a valve body (10) and a valve core (20) rotatably mounted inside the valve body (10), wherein a plurality of passages (11) are arranged on the valve body (10), and the rotation of the valve core (20) can selectively make at least two of the plurality of passages (11) communicate with each other, wherein the valve core (20) comprises a middle partition (40), wherein the middle partition (40) is perpendicular to the axis of the valve body (10) and is adapted to the inner wall of the valve body (10) so as to divide the interior of the valve body (10) into a first chamber (14) and a second chamber (15) separated from each other, wherein the plurality of passages (11) are all communicated with the second chamber (15), and the reversing valve further comprises: a cavity partition (50), the cavity partition (50) being arranged in the first cavity (14) and fixedly connected to the valve body (10), the cavity partition (50) comprising a partition plate, the partition plate being bent at a preset angle in a direction parallel to the axis of the valve core (20) to form a first plate segment (51) and a second plate segment (52), so as to separate a control cavity in the first cavity (14); a driving part, the driving part being arranged in the control chamber and fixedly connected to the valve core (20), the driving part driving the valve core (20) to rotate according to the pressure difference in the control chamber; The driving part comprises a driving plate (30), the driving plate (30) being fixed to the end of the valve core (20), the driving plate (30) being rotatably arranged in the control chamber and dividing the control chamber into a first pressure chamber (12) and a second pressure chamber (13), and the rotation axis of the driving plate (30) being coaxial with the valve core (20); The cavity partition (50) further comprises a plurality of limiting columns, which are respectively arranged on a side of the first plate segment (51) close to the control cavity and a side of the second plate segment (52) close to the control cavity.

2. The reversing valve according to claim 1, characterized in that: At least two control channels (16) are also provided on the valve body (10), and the at least two control channels (16) are respectively connected to the first pressure chamber (12) and the second pressure chamber (13).

3. The reversing valve according to claim 1, characterized in that: The cavity partition (50) is fixed on the inner end wall of the valve body (10) on the side close to the drive plate (30) and abuts against the middle partition plate (40) to separate a control cavity in the first cavity (14).

4. The reversing valve according to claim 1, characterized in that: The cavity partition (50) is fixed on the inner side wall of the valve body (10) close to the first chamber (14), and abuts against the middle partition plate (40) and the inner end wall of the valve body (10) close to the drive plate (30) to separate a control chamber in the first chamber (14).

5. The reversing valve according to claim 1, characterized in that: The first plate segment (51) is provided with a first lug structure (53), the second plate segment (52) is provided with a second lug structure (54), and the partition is connected to the inner end wall or the inner side wall of the valve body (10) via the first lug structure (53) and the second lug structure (54).

6. The reversing valve according to claim 1, characterized in that: The cavity partition (50) further comprises a first sealing ring, a first groove (55) is provided on the circumferential edge of the partition, and the first sealing ring is sleeved in the first groove (55).

7. The reversing valve according to claim 1, characterized in that: The reversing valve further comprises a second sealing ring, a second groove (31) is provided on the circumferential edge of the driving plate (30), and the second sealing ring is sleeved in the second groove (31).

8. The reversing valve according to claim 1, characterized in that: The valve body (10) comprises a main body and a first end cover (60) and a second end cover installed at both ends of the main body. A pivot boss (32) is provided on the top of the drive plate (30). The pivot boss is coaxial with the valve core (20) and is pivotally connected to the first end cover (60).

9. The reversing valve according to claim 1, characterized in that: The limiting column is a rubber column.

10. The reversing valve according to claim 3 or 4, characterized in that: The cavity partition (50) comprises a spacer block, which is a fan-shaped block, filling the first cavity (14) and forming a control cavity in the first cavity, and the end of the spacer block forms a first surface and a second surface.

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