Reversing valve and refrigeration system

Abstract

The present invention relates to the field of refrigeration technology, and in particular to a reversing valve and a refrigeration system. A reversing valve comprises a valve body with a valve seat disposed therein and a sliding valve assembly, wherein the valve body is provided with a first connection port and a plurality of communication ports, wherein the communication ports penetrate the valve seat, and the sliding valve assembly is disposed on the valve seat and can slide in the valve body to selectively block the communication ports; the reversing valve also comprises a muffler structure, wherein the muffler structure is disposed on the sliding valve assembly, and the muffler structure can block the first connection port as the sliding valve assembly slides, so as to reduce the flow area of ​​the first connection port. The advantage of the present invention is that during the reversing process of the reversing valve, the muffler structure slides with the sliding valve assembly, and the muffler structure blocks the first connection port step by step, thereby reducing the impact of the medium on the sliding valve assembly, reducing friction, and further reducing the noise generated during the sliding process of the sliding valve assembly.

Description

Technical Field

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

[0002] In a refrigeration system, a reversing valve is usually provided to realize the switching of different functions of the refrigeration system. The reversing valve includes a sliding valve assembly and a valve body. A valve seat is provided in the valve body. The sliding valve assembly slides in the valve body to realize the connection of different connection ports.

[0003] In the existing reversing valve, during the reversing process, the sliding valve assembly will slide laterally on the valve seat. Since the first connecting port is connected to the high-pressure exhaust port of the compressor, the sliding valve assembly is subjected to greater pressure, thereby increasing the friction between the sliding valve assembly and the valve seat during the sliding process, resulting in greater noise. Summary of the invention

[0004] Based on this, the present invention provides a reversing valve for the above technical problems, and the technical solution is as follows:

[0005] A reversing valve comprises a valve body with a valve seat therein and a sliding valve assembly, wherein the valve body is provided with a first connecting port and a plurality of communicating ports, wherein the communicating ports penetrate the valve seat, and the sliding valve assembly is arranged on the valve seat and can slide in the valve body to selectively block the communicating ports; the reversing valve also comprises a silencer structure, wherein the silencer structure is arranged on the sliding valve assembly, and the silencer structure can block the first connecting port as the sliding valve assembly slides to reduce the flow area of ​​the first connecting port.

[0006] With such a configuration, during the reversing process of the reversing valve, the silencer structure slides along with the sliding valve assembly, and the silencer structure gradually blocks the first connecting port, thereby reducing the pressure of the medium on the sliding valve assembly, reducing the friction between the sliding valve assembly and the valve seat, and further reducing the noise generated during the sliding process of the sliding valve assembly.

[0007] In one embodiment of the present invention, the silencer structure includes a bracket and a baffle, the bracket is at least partially located between the sliding valve assembly and the first connection port, the end surface of the baffle away from the bracket can abut against the end surface at the orifice of the first connection port, and the cross-sectional area of ​​the baffle is greater than or equal to the cross-sectional area of ​​the first connection port.

[0008] With such an arrangement, when the sliding valve assembly slides to directly below the first connecting port, the baffle can fully shield and block the first connecting port, further reducing friction and thus noise.

[0009] In one embodiment of the present invention, the end surface of the baffle close to the first connecting port is arc-shaped.

[0010] It is set in such a way that the baffle can cooperate with the arc-shaped inner wall of the first connection port, so as to further block the first connection port.

[0011] In one embodiment of the present invention, when the reversing valve is in the first working position or the second working position, the projection of the baffle on the bracket is located outside the projection of the first connection port on the bracket.

[0012] It is set in such a way that when the reversing valve finishes reversing or is stationary without reversing, that is, when the reversing valve is in the first working position or the second working position, the baffle does not block the first connection port, so as to prevent affecting the flow rate of the first connection port.

[0013] In one embodiment of the present invention, a first through hole is provided on the side surface of the bracket facing the first connection port.

[0014] It is set in such a way as to reduce the flow resistance of the medium entering from the first connection port and make the medium flow more smoothly.

[0015] In one embodiment of the present invention, the bracket and the baffle are separately provided.

[0016] It is set in such a way that the sizes of the bracket and the slider can be separately adjusted according to the space inside the valve body, which is convenient for design.

[0017] In one embodiment of the present invention, the slide valve assembly includes a connecting rod, a slider, a first stop block and a second stop block. The slider is fixed on the connecting rod. The first stop block and the second stop block are respectively fixed at both ends of the connecting rod. The slider can slide along the valve seat. The first stop block and the second stop block can abut against the side wall of the valve body to axially limit the slider.

[0018] In one embodiment of the present invention, the bracket includes a cross bar and two side bars. The cross bar is connected to the two side bars to form a "冂" shape. The side bars are fixed on the connecting rod. The cross bar is located between the slider and the first connection port. At least part of the slider is located between the two side bars. The baffle is fixed on the cross bar.

[0019] It is set in such a way that the length of the cross bar can be shortened to reduce the flow resistance of the medium.

[0020] In one embodiment of the present invention, the bracket is located between the slider and the first connection port, and both ends of the bracket are respectively connected to the first stop block and the second stop block.

[0021] It is set in such a way that the connection strength of the bracket can be enhanced.

[0022] In one embodiment of the present invention, the bracket includes a cross bar and a side bar, the cross bar is connected to the side bar, the cross bar is connected to the side bar to form a "7" shape, one end of the cross bar away from the side bar is connected to the first stop block or the second stop block, the cross bar is located between the slider and the first connecting port, and the baffle is fixed to the cross bar.

[0023] Such an arrangement can not only shorten the length of the crossbar but also enhance the connection strength of the bracket.

[0024] The present invention also provides the following technical solutions:

[0025] A refrigeration system comprises the above-mentioned reversing valve.

[0026] Compared with the prior art, the reversing valve provided by the present invention has a silencer structure arranged on the sliding valve assembly. The silencer structure can move with the sliding valve assembly and block the first connecting port during the movement, thereby reducing the flow area of ​​the first connecting port, reducing the pressure of the high-pressure medium on the sliding valve assembly, and reducing the friction between the sliding valve assembly and the valve seat during the sliding process, thereby reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of the reversing valve provided by the present invention;

[0028] Figure 2 A cross-sectional view of a reversing valve according to one embodiment of the present invention;

[0029] Figure 3 A schematic structural diagram of a slide valve assembly and a muffler structure of one embodiment provided by the present invention;

[0030] Figure 4 A cross-sectional view of a reversing valve according to another embodiment of the present invention;

[0031] Figure 5 A schematic structural diagram of a slide valve assembly and a muffler structure according to another embodiment of the present invention;

[0032] Figure 6 A cross-sectional view of a reversing valve according to another embodiment of the present invention;

[0033] Figure 7 A schematic structural diagram of a slide valve assembly and a muffler structure according to another embodiment of the present invention;

[0034] Figure 8 This is a schematic structural diagram of the slide valve assembly and the silencer structure provided by the present invention.

[0035] The symbols in the figure mean the following:

[0036] 100, reversing valve; 10, valve body; 101, valve seat; 102, connecting port; 11, first inner cavity; 12, first connecting port; 13, second connecting port; 14, third connecting port; 15, fourth connecting port; 16, first connecting pipe; 17, second connecting pipe; 18, third connecting pipe; 19, fourth connecting pipe; 20, sliding valve assembly; 21, slider; 211, groove; 212, second inner cavity; 22, connecting rod; 221, second through hole; 23, first stopper; 24, second stopper; 30, silencer structure; 31, bracket; 311, first through hole; 312, cross bar; 313, side bar; 32, baffle. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0040] See also Figures 1 to 8 The present invention provides a reversing valve 100, which is used in a refrigeration system for switching between different pipelines. In this embodiment, the reversing valve 100 is a four-way reversing valve. In other embodiments, the reversing valve 100 can also be a five-way reversing valve, a six-way reversing valve or other types of reversing valves.

[0041] See also Figure 2 , Figure 4 and Figure 6The reversing valve 100 includes a valve body 10 and a sliding valve assembly 20. The valve body 10 is provided with a valve seat 101. The sliding valve assembly 20 is arranged on the valve seat 101. The valve body 10 has a first inner cavity 11. The sliding valve assembly 20 is arranged in the first inner cavity 11. The sliding valve assembly 20 can slide in the first inner cavity 11.

[0042] Specifically, the valve body 10 is provided with a first connection port 12, which is in communication with the first inner cavity 11. It should be noted that, in this embodiment, the first connection port 12 is a high-pressure port, i.e., a "D" port, which is connected to the exhaust port of a compressor (not shown) in the refrigeration system. In other embodiments, according to different uses of the reversing valve 100, the first connection port 12 can also be connected to other devices.

[0043] The valve body 10 is provided with a plurality of communication ports 102, which respectively penetrate the valve seat 101, and the sliding valve assembly 20 slides in the valve body 10 to selectively block each communication port 102. In this embodiment, the communication ports 102 include a second connection port 13, a third connection port 14, and a fourth connection port 15, and the second connection port 13, the third connection port 14, and the fourth connection port 15 are arranged on the side of the valve body 10 opposite to the first connection port 12. The first connection port 12 is connected to a first connection pipe 16, the second connection port 13 is connected to a second connection pipe 17, the third connection port 14 is connected to a third connection pipe 18, and the fourth connection port 15 is connected to a fourth connection pipe 19.

[0044] The second connecting pipe 17 is connected to the evaporator (not shown) in the refrigeration system, that is, the second connecting port 13 is the "E" port, the third connecting pipe 18 is connected to the air intake port of the compressor, the third connecting port 14 is the "S" port, and the fourth connecting pipe 19 is connected to the condenser (not shown), that is, the fourth connecting port 15 is the "C" port. In other embodiments, the valve body 10 may also be provided with a fifth connecting port, and the fifth connecting port is connected to a fifth connecting pipe. According to different uses of the reversing valve 100, the fifth connecting pipe is connected to another heat exchanger, the first connecting pipe 16 or other positions, and other connecting ports may also be provided on the valve body 10.

[0045] Furthermore, the sliding valve assembly 20 includes a slider 21 and a connecting rod 22, the slider 21 is fixed on the connecting rod 22, a groove 211 is provided on the side of the slider 21 away from the first connecting port 12, the groove 211 and the valve seat 101 form a second inner cavity 212, the second inner cavity 212 can be connected to the second connecting port 13 and the third connecting port 14, or the second inner cavity 212 can be connected to the third connecting port 14 and the fourth connecting port 15, the first inner cavity 11 and the second inner cavity 212 are always separated and not connected.

[0046] A second through hole 221 is provided on the connecting rod 22, and the second through hole 221 is connected to the first inner cavity 11 to reduce the flow resistance of the medium when flowing in the first inner cavity 11. In the present embodiment, two second through holes 221 are provided, and the two second through holes 221 are provided on the side of the connecting rod 22 facing the first connecting port 12, and are respectively provided near the two ends of the connecting rod 22, and the slider 21 is located between the two second through holes 221. In other embodiments, according to the size of the first inner cavity 11, the second through hole 221 can also be provided as one, three or more than three. The sliding valve assembly 20 also includes a first stopper 23 and a second stopper 24, and the first stopper 23 and the second stopper 24 are respectively fixed at the two ends of the connecting rod 22, and are used to axially limit the slider 21. In the present invention, the medium refers to refrigerants such as R134a, R404A, and R32.

[0047] In this embodiment, when the refrigeration system is in cooling mode, the first stop block 23 abuts against the side wall of the inner cavity, the second connecting port 13 and the second inner cavity 212 are connected to the third connecting port 14, and the first connecting port 12 is connected to the fourth connecting port 15 through the first inner cavity 11; when the refrigeration system needs to switch to heating mode, the sliding valve assembly 20 slides, the second stop block 24 abuts against the side wall of the first inner cavity 11, the third connecting port 14 and the second inner cavity 212 are connected to the fourth connecting port 15, and the first connecting port 12 is connected to the second connecting port 13 through the first inner cavity 11.

[0048] In the existing reversing valve 100, when the reversing valve 100 is reversing, since the first connecting port 12 is connected to the compressor exhaust port and the pressure is relatively high, during the sliding process of the slider 21, the pressure of the high-pressure airflow will increase the friction between the slider 21 and the valve seat 101, especially when the slider 21 is directly below the first connecting port 12, the pressure is the largest and the noise problem is more serious.

[0049] The present invention provides a silencer structure 30 on the sliding valve assembly 20. The silencer structure 30 can block the first connecting port 12 as the sliding valve assembly 20 slides, thereby reducing the airflow pressure applied to the sliding valve assembly 20 and reducing the friction between the sliding valve assembly 20 and the valve seat 101, thereby alleviating the noise problem.

[0050] Specifically, the silencer structure 30 includes a bracket 31 and a baffle 32. The bracket 31 is fixed on the connecting rod 22, and the baffle 32 is arranged on the bracket 31. At least a portion of the bracket 31 is located between the sliding valve assembly 20 and the first connecting port 12. The bracket 31 can drive the baffle 32 to slide as the sliding valve assembly 20 slides. The end surface of the baffle 32 away from the bracket 31 can abut against the end surface at the opening of the first connecting port 12, and the baffle 32 can cover the first connecting port 12.

[0051] The cross-sectional area of ​​the baffle 32 is greater than or equal to the cross-sectional area of ​​the first connection port 12. When the baffle 32 slides to the bottom of the first connection port 12, the baffle 32 can block the first connection port 12 to the maximum extent, further relieving the pressure of the slider 21 to alleviate the noise problem.

[0052] Preferably, the bracket 31 and the baffle 32 are separately provided, so that the sizes of the bracket 31 and the baffle 32 can be adjusted according to the space of the first inner cavity 11. The bracket 31 and the baffle 32 can be connected by bolts or by other methods such as welding.

[0053] Furthermore, the end surface of the baffle 32 close to the first connection port 12 is arc-shaped to match the inner wall of the arc-shaped first connection port 12. When the baffle 32 moves to just below the first connection port 12, it can increase the sealing performance and reduce the pressure on the slider 21.

[0054] When the reversing valve 100 is in the first position or the second position, the projection of the baffle 32 on the bracket 31 is located outside the projection of the first connection port 12 on the bracket 31. In this way, when the reversing valve 100 is in the first position or the second position, that is, when the reversing valve 100 is not reversing, the baffle 32 does not block the first connection port 12, so that the first connection port 12 has sufficient flow. It should be explained that the first position and the second position are the states when the reversing valve 100 is not reversing. In this embodiment, the first position is the cooling mode, the second position is the heating mode, the first connection port 12 is connected to the fourth connection port 15, the fourth connection port 15 is not connected to the third connection port 14, and the second connection port 13 is connected to the third connection port 14; the second state is that the first connection port 12 is connected to the second connection port 13, the second connection port 13 is not connected to the third connection port 14, and the third connection port 14 is connected to the fourth connection port 15.

[0055] See also Figure 8 A first through hole 311 is formed on the side of the bracket 31 facing the first connecting port 12 . When the reversing valve 100 is in the first position or the second position, the first through hole 311 on the bracket 31 can reduce the flow resistance of the medium flowing in from the first connecting port 12 .

[0056] See also Figure 2 and Figure 3, in one embodiment, both ends of the bracket 31 are respectively connected to the first stopper 23 and the second stopper 24, and the bracket 31 is located between the slider 21 and the first connection port 12. With such a setting, the connection strength of the bracket 31 can be enhanced. In this embodiment, the first through holes 311 can be provided in two numbers, and the baffle 32 is located between the two first through holes 311, so that when the reversing valve 100 is in the first working position or the second working position, the medium can smoothly flow from the first connection port 12 into the fourth connection port 15 or the second connection port 13, reducing the flow resistance. In other embodiments, the first through holes 311 can also be provided in three or more numbers, and the present invention does not limit the number of the first through holes 311.

[0057] Please refer to Figure 4 and Figure 5 , in another embodiment, the bracket 31 at least includes a cross bar 312 and two side bars 313. The side bars 313 are connected to the cross bar 312 to form a "冂"-shaped bracket 31. The side bars 313 are fixed to the connecting rod 22, the cross bar 312 is located between the slider 21 and the first connection port 12, a part of the slider 21 is located between the two side bars 313, and the baffle 32 is fixed to the cross bar 312. With such a setting, the length of the cross bar 312 can be shortened, thereby reducing the resistance generated by the bracket 31 to the medium flow. In this embodiment, the first through holes 311 can be provided in two numbers, the baffle 32 is located between the two first through holes 311, and the first through holes 311 are opened on the cross bar 312. In other embodiments, since the cross bar 312 is short, the first through holes 311 may not be provided.

[0058] Please refer to Figure 6 and Figure 7 , in yet another embodiment, the bracket 31 includes a cross bar 312 and a side bar 313. The cross bar 312 is connected to the side bar 313. One end of the side bar 313 is connected to the connecting rod 22 to form a "7"-shaped bracket 31, and the end of the cross bar 312 away from the side bar 313 is connected to the first stopper 23 or the second stopper 24. With such a setting, while enhancing the connection strength of the bracket 31, the length of the cross bar 312 can be shortened. In this embodiment, the cross bar 312 is connected to the first stopper 23, and the first through hole 311 is provided in one number, and the first through hole 311 is located between the first stopper 23 and the baffle 32. In other embodiments, one end of the side bar 313 is connected to the connecting rod 22, and the other end is connected to the second stopper 24. The first through hole 311 can be provided in one number, and one first through hole 311 is provided between the second stopper 24 and the baffle 32. In another embodiment, the bracket 31 can also be provided in a "T" shape. One end of the side bar 313 is connected to the connecting rod 22, and the other end is connected to the cross bar 312. Both ends of the cross bar 312 are respectively connected to the first stopper 23 and the second stopper 24, and the first through holes 311 are provided in two numbers, and the baffle 32 is located between the two first through holes 311.

[0059] The present invention further provides a refrigeration system, which includes the reversing valve 100 described above, and includes a refrigeration mode and a heating mode.

[0060] During operation, when the refrigeration system needs cooling, the reversing valve 100 is switched to the first position. At this time, the first connection port 12 is connected to the fourth connection port 15 through the first inner cavity 11, and the second connection port 13 is connected to the third connection port 14 through the second inner cavity 212; when the refrigeration system needs to be switched to the heating mode, the sliding valve assembly 20 slides and slides with the silencer structure 30. During the sliding process, the baffle 32 blocks the first connection port 12 step by step and reduces the flow area of ​​the first connection port 12. With the pressure borne by the slider 21, when the baffle 32 slides to the first connection port When the first connection port 12 is directly below the interface 12, the baffle 32 can block the first connection port 12, further reducing the flow area of ​​the first connection port 12, thereby reducing the friction between the slider 21 and the medium during the sliding process, and reducing the sliding noise; when the switching is completed, the reversing valve 100 is in the second position, at this time, the first connection port 12 is connected to the second connection port 13 through the first inner cavity 11, and the third connection port 14 is connected to the fourth connection port 15 through the second inner cavity 212; the process of switching from heating mode to cooling mode is the same as the process of switching from cooling mode to heating mode, which will not be repeated here.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A directional control valve, comprising a valve body (10) with a valve seat (101) provided therein and a spool assembly (20). The valve body (10) is provided with a first connection port (12) and a plurality of communication ports (102). The communication ports (102) are arranged on a side of the valve body (10) opposite to the first connection port (12). The communication ports (102) penetrate through the valve seat (101). The spool assembly (20) is arranged on the valve seat (101) and can slide within the valve body (10) to selectively block the communication ports (102). It is characterized in that The directional control valve further includes a silencing structure (30). The silencing structure (30) is arranged on the spool assembly (20). The silencing structure (30) can slide with the spool assembly (20) to block the first connection port (12) so as to reduce the flow area of the first connection port (12). The silencing structure (30) includes a bracket (31) and a baffle (32). The baffle (32) is fixed to the bracket (31). The end face of the baffle (32) away from the bracket (31) can abut against the end face at the orifice of the first connection port (12), and the cross-sectional area of the baffle (32) is greater than or equal to the cross-sectional area of the first connection port (12).

2. The reversing valve according to claim 1, characterized in that: The end face of the baffle (32) close to the first connection port (12) is arc-shaped.

3. The reversing valve according to claim 1, characterized in that: When the directional control valve is in the first working position or the second working position, the projection of the baffle (32) on the bracket (31) is located outside the projection of the first connection port (12) on the bracket (31).

4. The reversing valve according to claim 1, characterized in that: The side face of the bracket (31) facing the first connection port (12) is provided with a first through hole (311).

5. The reversing valve according to claim 1, characterized in that: The bracket (31) and the baffle (32) are separately arranged.

6. The reversing valve according to claim 1, characterized in that: The spool assembly (20) includes a connecting rod (22), a slider (21), a first stop block (23) and a second stop block (24). The slider (21) is fixed to the connecting rod (22). The first stop block (23) and the second stop block (24) are respectively fixed to both ends of the connecting rod (22). The slider (21) can slide along the valve seat (101). The first stop block (23) and the second stop block (24) can abut against the side wall of the valve body (10) to axially limit the slider (21).

7. The reversing valve according to claim 6, characterized in that: The bracket (31) includes a cross bar (312) and two side bars (313). The cross bar (312) is connected to the two side bars (313) to form a "冂"-shaped structure. The side bars (313) are fixed to the connecting rod (22). The cross bar (312) is located between the slider (21) and the first connection port (12). At least a part of the slider (21) is located between the two side bars (313). The baffle (32) is fixed to the cross bar (312).

8. The reversing valve according to claim 6, characterized in that: The bracket (31) is located between the slider (21) and the first connection port (12), and both ends of the bracket (31) are respectively connected to the first stop block (23) and the second stop block (24).

9. The reversing valve according to claim 6, characterized in that: The bracket (31) comprises a cross bar (312) and a side bar (313); the cross bar (312) and the side bar (313) are connected to form a "7" shape; the side bar (313) is fixed to the connecting rod (22); one end of the cross bar (312) away from the side bar (313) is connected to the first stopper (23) or the second stopper (24); the cross bar (312) is located between the slider (21) and the first connecting port (12); and the baffle (32) is fixed to the cross bar (312).

10. A refrigeration system, characterized in that: It comprises a reversing valve as described in any one of claims 1 to 9.

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