Reversing valve

Abstract

The invention provides a reversing valve which comprises a valve body part and a valve element part, the valve body part comprises a valve body, the valve body is provided with a valve cavity, the valve element part comprises a valve element, a first piston, a second piston, a first connecting piece and a second connecting piece, the first piston is fixedly connected with the first connecting piece, and the second piston is fixedly connected with the second connecting piece. The second piston is fixedly connected with the second connecting piece; the first connecting piece is connected with the valve element in a limiting mode, and a radial displacement gap and a longitudinal displacement gap are formed between the first connecting piece and the valve element. The second connecting piece is connected with the valve element in a limiting mode, and radial and longitudinal displacement gaps are formed between the second connecting piece and the valve element. According to the reversing valve, the potential quality hazard that the valve element is stuck in the square valve cavity can be avoided.

Description

Technical Field

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

[0002] Reversing valves are widely used in the field of fluid control technology. For example, the reversing valves used in heat pump air conditioning systems can switch the flow path between cooling and heating modes. With the development of industrial technology and the improvement of people's living needs, the use of large-capacity reversing valves in heat pump air conditioners is increasing. For example, patent publication number CN202056350 discloses a four-way reversing valve. In this technology, a valve core component with an overall circular structure is provided, and the flow path is switched by a cylindrical valve body component sliding within the valve cavity. In the above background technology, there is room for improvement in the structural optimization of the reversing valve. Summary of the Invention

[0003] To this end, the present invention provides a reversing valve, comprising a valve body component and a valve core component, wherein the valve body component comprises a valve body, the valve body having a valve cavity, the valve cavity being at least partially a square cavity, the valve core component comprising a valve core, a first piston, a second piston, a first connecting member, and a second connecting member, the valve core being at least partially a square structure, and the valve core being at least partially located in the valve cavity;

[0004] The first piston is fixedly connected to the first connecting member, and the second piston is fixedly connected to the second connecting member; the first connecting member is limitedly connected to the valve core, and there is a radial and longitudinal displacement gap between the first connecting member and the valve core; the second connecting member is limitedly connected to the valve core, and there is a radial and longitudinal displacement gap between the second connecting member and the valve core.

[0005] The reversing valve provided by the present invention has radial and longitudinal clearances between the valve core and the connecting member, thereby allowing an appropriate amount of sliding displacement between the valve core and the piston. This reduces the risk of the valve core becoming stuck in the square valve cavity during the reversing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 : A structural schematic diagram of a reversing valve provided by the present invention;

[0007] Figure 2 : Figure 1 A three-dimensional schematic diagram of the middle valve body;

[0008] Figure 3 : Figure 1 A three-dimensional schematic diagram of the middle sleeve;

[0009] Figure 4 : Figure 1 The three-dimensional structure diagram of the middle valve core component;

[0010] Figure 5 : Figure 4 Schematic diagram of the cross-section structure of the middle valve core flow channel structure;

[0011] Figure 6 : Figure 4 A three-dimensional structural diagram of the middle connector and the piston;

[0012] Figure 7 : Figure 6 Three-dimensional structural diagram of the connecting parts.

[0013] Figure 1-Figure 7 Explanation of symbols:

[0014] 1- reversing valve;

[0015] 10-valve body parts;

[0016] 100-valve body;

[0017] 110-valve chamber;

[0018] 111-first inner wall portion, 112-second inner wall portion;

[0019] 113 - third inner wall portion, 114 - fourth inner wall portion;

[0020] 120 - first side wall portion, 121 - first positioning groove;

[0021] 130 - second side wall portion, 131 - second positioning groove;

[0022] 200-sleeve;

[0023] 210-first sleeve;

[0024] 211 - first flange portion, 212 - first piston chamber;

[0025] 220-second sleeve;

[0026] 221 - second flange portion, 222 - second piston chamber;

[0027] 310-outer edge;

[0028] 320-connection port;

[0029] 321 - first connection port, 322 - second connection port;

[0030] 323 - third connection port, 324 - fourth connection port;

[0031] 302- communicating cavity;

[0032] 330-recessed connecting portion;

[0033] 50-valve core component;

[0034] 500-valve core;

[0035] 511-first outer wall portion, 512-second outer wall portion;

[0036] 513 - third outer wall portion, 514 - fourth outer wall portion;

[0037] 520-first inlet channel, 530-second inlet channel;

[0038] 540-first reversing channel, 550-second reversing channel;

[0039] 600-piston;

[0040] 610-first piston;

[0041] 620-second piston;

[0042] 700-Connection sleeve:

[0043] 710-first connecting sleeve; 720-second connecting sleeve;

[0044] 731-limiting cavity, 732-connecting groove;

[0045] 800-connector;

[0046] 810-first connecting member; 820-second connecting member.

[0047] 801-main body, 802-first bending portion, 803-second bending portion;

[0048] 910-Mounting screws. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying any creative work. The directional words such as upper and lower involved in this article are defined by the positions of the parts relative to each other shown in the drawings. They are only for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by the present invention.

[0050] Figure 1 This is a structural diagram of a reversing valve provided by the present invention. Figure 2 for Figure 1 Schematic diagram of the valve body. Figure 3 for Figure 1 A three-dimensional diagram of the middle sleeve. Figure 4 for Figure 1 The three-dimensional structure diagram of the middle valve core component;

[0051] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The reversing valve 1 includes a valve body component 10 and a valve core component 50 .

[0052] The valve assembly 10 includes a valve body 100 and a sleeve 200 (a first sleeve 210 and a second sleeve 220). In this embodiment, the valve body 100 is a cylindrical structure having a valve cavity 110, which is a rectangular cavity. The first sleeve 210 and the second sleeve 220 are welded to the valve body 100. The first sleeve 210 has a first piston cavity 212 that communicates with the valve cavity 110, while the second sleeve 220 has a second piston cavity 222 that communicates with the valve cavity 110.

[0053] The valve core component 50 includes a valve core 500 and pistons 600 (a first piston 610 and a second piston 620 ). The first piston 610 is located in the first piston chamber 212 , and the second piston 620 is located in the second piston chamber 222 . The valve core 500 is a square structure and is located in the valve chamber 110 .

[0054] The piston 600 includes a first piston 610 and a second piston 620. The first piston 610 is fixedly connected to the first connecting member 810, and the second piston 620 is fixedly connected to the second connecting member 820. The first connecting member 810 is limitedly connected to the valve core 500, and there is a radial and longitudinal displacement gap between the first connecting member 810 and the valve core 500 (i.e., Figure 4 The second connecting member 820 is connected to the valve core 500, and there is a radial and longitudinal displacement gap between the second connecting member 820 and the valve core 500 (ie, Figure 4 The first piston 610 is located in the first piston chamber 212 and can slide relative to the first piston chamber 212, and the second piston 620 is located in the second piston chamber 222 and can slide relative to the first piston chamber 212.

[0055] The reversing valve of the aforementioned technical solution has a square-shaped valve cavity and a square-shaped valve core, requiring high machining precision for the mating surfaces of the valve cavity and valve core. By providing radial and longitudinal clearances between the valve core and the connector, an appropriate amount of sliding displacement is allowed between the valve core and the piston, reducing the risk of the valve core becoming stuck within the square valve cavity during the reversing process.

[0056] As a further extension of the above technical solution, the valve body 100 includes a first inner wall portion 111, a second inner wall portion 112, a third inner wall portion 113, and a fourth inner wall portion 114. These four inner wall portions constitute the walls of the valve cavity 110 (i.e., the four side walls of the square cavity). The side walls of the valve core 500 include a first outer wall portion 511, a second outer wall portion 512, a third outer wall portion 513, and a fourth outer wall portion 514. Corresponding to the valve cavity 110, the first outer wall portion 511 cooperates with the first inner wall portion 111, the second outer wall portion 512 cooperates with the second inner wall portion 112, the third outer wall portion 513 cooperates with the third inner wall portion 113, and the fourth outer wall portion 514 cooperates with the fourth inner wall portion 114.

[0057] As a further extension of the above technical solution, the outer edge of the valve body 100 is generally cylindrical and includes a first sidewall portion 120 and a second sidewall portion 130. The first sidewall portion 120 includes a circular first positioning groove 121, and the second sidewall portion 130 includes a circular second positioning groove 131. The first sleeve 210 and the second sleeve 220 are thin-walled tubular structures and include flanged portions (a first flange 211 and a second flange 221). The first flange 211 is located in the first positioning groove 121, and the second flange 221 is located in the second positioning groove 131. The first flange 211 is welded to the first sidewall portion 120, and the second flange 221 is welded to the second sidewall portion 130.

[0058] The reversing valve of the above technical solution is fixedly connected to the side wall of the valve body by welding the flange portion of the sleeve, so that the overall structure can be compact.

[0059] As a further extension of the above-mentioned technical solution, the outer edge of the cylindrical valve body 100 includes an outer edge portion 310, a connection port portion 320, and a recessed connection portion 330. The connection port portion 320 is a tubular structure extending outward from the base of the valve body 100, and the recessed connection portion 330 surrounds the connection port portion 320. In terms of specific structural design, the outer edge portion 310, the connection port portion 320, and the recessed connection portion 320 are an integral structure made of the same material. By recessing the "circular outer edge" of the valve body inward to form the "recessed connection portion," the "connection port portion" with a tubular structure in the central region is also formed.

[0060] Specifically, there are four connection ports 320: a first connection port 321, a second connection port 322, a third connection port 323, and a fourth connection port 324. The connection ports 320 are evenly distributed along the circumference of the valve body. The first connection port 321 and the second connection port 322 are coaxially arranged, and the second connection port 322 and the fourth connection port 324 are coaxially arranged. Similarly, there are four recessed connection portions 330, each located between a corresponding connection port 320 and the outer edge portion 310. The communication cavity 302 of the first connection port 321 extends to the inner wall surface of the first inner wall portion 111, the communication cavity 302 of the second connection port 322 extends to the inner wall surface of the second inner wall portion 112, the communication cavity 302 of the third connection port 323 extends to the inner wall surface of the third inner wall portion 113, and the communication cavity 302 of the fourth connection port 324 extends to the inner wall surface of the fourth inner wall portion 114.

[0061] The reversing valve of the above technical solution can make the overall structure more compact by forming the connection port portion integrally on the valve body, and also increases the pressure resistance of the cavity, avoiding the leakage defect of the welding connection between the two materials.

[0062] Figure 5 for Figure 4 Schematic diagram of the cross-section structure of the valve core flow channel structure. Figure 5 Shown and referenced Figure 1 and Figure 4 The valve core 500 includes a first inlet channel 520, a second inlet channel 530, a first reversing channel 540, and a second reversing channel 550. When the valve core component 50 is in the first reversing position, the first inlet channel 520 connects the communication cavity of the first connection port portion 321 with the communication cavity 302 of the third connection port portion 323, and the first reversing channel 540 connects the communication cavity 302 of the second connection port portion 322 with the communication cavity 302 of the fourth connection port portion 324.

[0063] When the valve core component 50 is located in the second reversing position, the second inlet channel 530 connects the connecting chamber 302 of the first connection port portion 321 with the connecting chamber 302 of the fourth connection port portion 324, and the second reversing channel 550 connects the connecting chamber 302 of the second connection port portion 322 with the connecting chamber 302 of the third connection port portion 323.

[0064] Figure 6 for Figure 4 The three-dimensional structure diagram of the middle connecting piece and the piston, Figure 7 for Figure 6 Three-dimensional structural diagram of the connecting parts.

[0065] like Figure 6 and Figure 7 Shown and referenced Figure 1 and Figure 2 As a further extension of the technical solution provided by the present invention, the valve core component 50 further includes a connector 800 and a connector sleeve 700 (a first connector 810, a second connector 820, a first connector sleeve 710, and a second connector sleeve 720).

[0066] The first piston 610 is fixedly connected to the first connecting member 810 , the second piston 620 is fixedly connected to the second connecting member 820 , and the first connecting member 810 and the second connecting member 820 are limitedly connected to the valve core 500 .

[0067] The connecting sleeve 700 is fixed on both sides of the valve core 500 by installing screws 910. The connecting sleeve 700 is roughly block-shaped, with an inner cavity on one side serving as a limiting cavity 731. The bottom of the limiting cavity 731 is provided with an opening as a connecting groove 732, and the connecting groove 732 connects the limiting cavity 731 with the end face on the other side.

[0068] The connecting member 800 is made by stamping and bending a metal sheet. The connecting member 800 includes a central main body 801, a first bending portion 802 located on one side of the main body 801, and a second bending portion 803 located on the other side of the main body 801. There are two first bending portions 802, which are bent up and down relative to the main body 801 respectively. The main body 801 is penetrated by the connecting groove 732, so that the first bending portion 802 is located in the limiting cavity 731 as a limiting portion to achieve relative limiting, and the limiting portion has a radial and longitudinal displacement gap relative to the limiting cavity 731. Similarly, there are two second bending portions 803, which are bent up and down relative to the main body 801 respectively. The second bending portion 803 can be fixedly connected to the piston 600 by screws.

[0069] After installation, radial and longitudinal displacement gaps are provided between the first connecting member 810 and the valve core 500 , and radial and longitudinal displacement gaps are provided between the second connecting member 820 and the valve core 500 .

[0070] The above are only preferred implementation methods cited to better illustrate the technical solution of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. All these improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A reversing valve, comprising a valve body component (10) and a valve core component (50), characterized in that: The valve body component (10) comprises a valve body (100), the valve body (100) has a valve cavity (110), and the valve cavity (110) is at least partially a square cavity. The valve core component (50) comprises a valve core (500), a first piston (610), a second piston (620), a first connecting member (810), and a second connecting member (820), the valve core (500) is at least partially a square structure, and the valve core (500) is at least partially located in the valve cavity (110); The first piston (610) is fixedly connected to the first connecting member (810), and the second piston (620) is fixedly connected to the second connecting member (820); the first connecting member (810) is limitedly connected to the valve core (500), and a radial and longitudinal displacement gap exists between the first connecting member (810) and the valve core (500); the second connecting member (820) is limitedly connected to the valve core (500), and a radial and longitudinal displacement gap exists between the second connecting member (820) and the valve core (500).

2. The reversing valve according to claim 1, wherein: The valve body (100) includes a first inner wall portion (111), a second inner wall portion (112), a third inner wall portion (113) and a fourth inner wall portion (114), wherein the first inner wall portion (111), the second inner wall portion (112), the third inner wall portion (113) and the fourth inner wall portion (114) serve as wall portions of the valve cavity (110); The valve core (500) includes a first outer wall portion (511), a second outer wall portion (512), a third outer wall portion (513) and a fourth outer wall portion (514), wherein the first outer wall portion (511) cooperates with the first inner wall portion (111), the second outer wall portion (512) cooperates with the second inner wall portion (112), the third outer wall portion (513) cooperates with the third inner wall portion (113), and the fourth outer wall portion (514) cooperates with the fourth inner wall portion (114).

3. The reversing valve according to claim 2, characterized in that: The valve body component (10) further includes a first sleeve (210) and a second sleeve (220), wherein the first sleeve (210) and the second sleeve (220) are welded to the valve body (100); the first sleeve (210) has a first piston chamber (212), which is in communication with the valve chamber (110); the second sleeve (220) has a second piston chamber (222), which is in communication with the valve chamber (110); the first piston (610) is located in the first piston chamber (212), and the second piston (620) is located in the second piston chamber (222).

4. The reversing valve according to claim 3, characterized in that: The valve body (100) includes a first side wall portion (120) and a second side wall portion (130); the first sleeve (210) includes a first flange portion (211); the second sleeve (220) includes a second flange portion (221); the first flange portion (211) is welded and fixed to the first side wall portion (120); and the second flange portion (221) is welded and fixed to the second side wall portion (130).

5. The reversing valve according to claim 2, wherein: The valve body (100) is cylindrical and includes an outer edge portion (310), a connection port portion (320) and a recessed connection portion (330). The recessed connection portion (330) is located between the outer edge portion (310) and the connection port portion (320). The recessed connection portion (330) surrounds the connection port portion (320). The outer edge portion (310), the connection port portion (320) and the recessed connection portion (330) are an integrated structure.

6. The reversing valve according to claim 5, characterized in that: There are four connection port portions (320), including a first connection port portion (321), a second connection port portion (322), a third connection port portion (323) and a fourth connection port portion (324). Each of the connection port portions (320) is evenly distributed along the circumference of the valve body (100). The connecting cavity of the first connection port portion (321) extends to the inner wall surface of the first inner wall portion (111), the connecting cavity of the second connection port portion (322) extends to the inner wall surface of the second inner wall portion (112), the connecting cavity of the third connection port portion (323) extends to the inner wall surface of the third inner wall portion (113), and the connecting cavity of the fourth connection port portion (324) extends to the inner wall surface of the fourth inner wall portion (114).

7. The reversing valve according to any one of claims 1 to 6, characterized in that: The valve core component (50) further comprises a first connecting sleeve (710) and a second connecting sleeve (720), wherein the first connecting sleeve (710) and the second connecting sleeve (720) are fixedly connected to the valve core (500), wherein the first connecting sleeve (710) and the second connecting sleeve (720) comprise a limiting cavity (731), and the first connecting piece (810) and the second connecting piece (820) comprise a limiting portion, wherein the limiting portion is located in the limiting cavity (731). A clearance for radial and longitudinal displacement is formed between the limiting portion and the limiting cavity (731).

8. The reversing valve according to claim 7, characterized in that: The first connecting sleeve (710) and the second connecting sleeve (720) further include a connecting groove (732), and the connecting groove (732) is located at the bottom of the limiting cavity (731). The first connecting member (810) and the second connecting member (820) further include a connecting portion, and the connecting portion passes through the connecting groove (732).

9. The reversing valve according to claim 8, characterized in that: The first connecting member (810) and the second connecting member (820) are made of metal plates, including a main body (801), a first bending portion (802) and a second bending portion (803), wherein the first bending portion (802) is located on one side of the main body (801), and the second bending portion (803) is located on the other side of the main body (801), the first bending portion (802) serves as the limiting portion, and the second bending portion (803) is fixedly connected to the corresponding first piston (610) or the second piston (620).

10. The reversing valve according to claim 7, wherein: The valve core (500) further comprises a first inlet channel (520), a second inlet channel (530), a first reversing channel (540) and a second reversing channel (550). When the valve core component (50) is located at the first reversing position, the first inlet channel (520) communicates with the communication cavity of the first connection port portion (321) and the communication cavity of the third connection port portion (323), and the first reversing channel (540) communicates with the communication cavity of the second connection port portion (322) and the communication cavity of the fourth connection port portion (324). When the valve core component (50) is located at the second reversing position, the second inlet channel (530) connects the communicating chamber of the first connecting port portion (321) with the communicating chamber of the fourth connecting port portion (324), and the second reversing channel (550) connects the communicating chamber of the second connecting port portion (322) with the communicating chamber of the third connecting port portion (323).

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