Reversing valve

Abstract

The invention provides a reversing valve, which comprises a valve body part and a valve core part, and is characterized in that the valve body part comprises a valve body, a first sleeve and a second sleeve, the valve body is provided with a valve cavity, the valve body comprises a first side wall part and a second side wall part, the first sleeve comprises a first flanging part, the second sleeve comprises a second flanging part, and the valve core part is provided with a valve core. The first side wall part comprises a first annular positioning groove, the first flanging part is located in the first annular positioning groove and fixedly connected with the first side wall part in a welded mode, the second side wall part comprises a second annular positioning groove, and the second flanging part is located in the second annular positioning groove and fixedly connected with the second side wall part in a welded mode. The reversing valve is compact in overall structure.

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;

[0004] The valve body component includes a valve body, a first sleeve and a second sleeve, the valve body having a valve cavity, the valve body including a first inner wall portion, a second inner wall portion, a third inner wall portion, a first side wall portion and a second side wall portion, the first inner wall portion, the second inner wall portion and the third inner wall portion serving as cavity walls of the valve cavity, the first sleeve including a first flange portion, the second sleeve including a second flange portion, the first side wall portion including a first annular positioning groove, the second side wall portion including a second annular positioning groove, the first flange portion being located in the first annular positioning groove, the second flange portion being located in the second annular positioning groove, the first flange portion being fixedly connected to the first side wall portion by welding, and the second flange portion being fixedly connected to the second side wall portion by welding;

[0005] The valve core component includes a valve core, a first piston and a second piston, and the valve core includes a first outer wall portion, a second outer wall portion and a third outer wall portion, the first outer wall portion cooperates with the first inner wall portion, the second outer wall portion cooperates with the second inner wall portion, and the third outer wall portion cooperates with the third inner wall portion.

[0006] The first sleeve has a first piston chamber, which is connected to the valve chamber. The second sleeve has a second piston chamber, which is connected to the valve chamber. The first piston is located in the first piston chamber, and the second piston is located in the second piston chamber. The first piston is connected to the valve core, and the second piston is connected to the valve core.

[0007] The reversing valve provided by the present invention cooperates with the outer wall of the valve core and the inner wall of the valve body, and the flange of the sleeve is welded and fixed to the annular positioning groove of the side wall of the valve body, so that the valve body and the sleeve are easy to install in a limited position and have a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 : A structural schematic diagram of a reversing valve provided by the present invention;

[0009] Figure 2 : Figure 1 A three-dimensional diagram of the middle valve body and the connecting pipe after being fixed;

[0010] Figure 3 : Figure 1 A three-dimensional schematic diagram of the middle sleeve;

[0011] Figure 4 : Figure 1 The three-dimensional structure diagram of the middle valve core component;

[0012] Figure 5 : Figure 4 Schematic diagram of the cross-section structure of the middle valve core flow channel structure;

[0013] Figure 6 : Figure 1 An enlarged schematic diagram of the middle connection port area and the connection position of the connecting pipe.

[0014] Figures 1-6 Explanation of symbols:

[0015] 1- reversing valve;

[0016] 10-valve body parts;

[0017] 100-valve body;

[0018] 110-valve chamber;

[0019] 111-first inner wall portion, 112-second inner wall portion;

[0020] 113 - third inner wall portion, 114 - fourth inner wall portion;

[0021] 120 - first side wall portion, 121 - first positioning groove;

[0022] 130 - second side wall portion, 131 - second positioning groove;

[0023] 200-sleeve;

[0024] 210-first sleeve;

[0025] 211 - first flange portion, 212 - first piston chamber;

[0026] 220-second sleeve;

[0027] 221 - second flange portion, 222 - second piston chamber;

[0028] 310-outer edge;

[0029] 311-first cylindrical portion, 312-second cylindrical portion;

[0030] 320-connection port;

[0031] 321 - first connection port, 322 - second connection port;

[0032] 323 - third connection port, 324 - fourth connection port;

[0033] 301- first plane portion;

[0034] 302- communicating cavity;

[0035] 330-recessed connecting portion;

[0036] 331-concave cone surface, 332-bottom surface;

[0037] 400-connecting pipe;

[0038] 401- second plane portion;

[0039] 410 - first connecting pipe, 420 - second connecting pipe;

[0040] 430 - third connecting pipe, 440 - fourth connecting pipe;

[0041] 50-valve core component;

[0042] 500-valve core;

[0043] 511-first outer wall portion, 512-second outer wall portion;

[0044] 513 - third outer wall portion, 514 - fourth outer wall portion;

[0045] 520-first inlet channel, 530-second inlet channel;

[0046] 540-first reversing channel, 550-second reversing channel;

[0047] 600-piston;

[0048] 610-first piston;

[0049] 620-second piston;

[0050] 800-connector;

[0051] 810-first connecting member; 820-second connecting member. DETAILED DESCRIPTION

[0052] 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.

[0053] Figure 1 This is a structural diagram of a reversing valve provided by the present invention. Figure 2 for Figure 1 The three-dimensional diagram of the middle valve body and the connecting pipe after being fixed. Figure 3 for Figure 1 A three-dimensional diagram of the middle sleeve. Figure 4 for Figure 1 Three-dimensional structural diagram of the middle valve core component.

[0054] 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 .

[0055] The valve assembly 10 comprises 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. The valve cavity 110 is a rectangular cavity, and the valve body 100 comprises 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 portions serve as the inner walls of the valve cavity (i.e., the four side walls of the rectangular cavity).

[0056] The outer edge of the valve body 100 is substantially cylindrical and includes a first side wall portion 120 and a second side wall portion 130 . The first side wall portion 120 includes a first annular positioning groove 121 , and the second side wall portion 130 includes a second annular positioning groove 131 .

[0057] The first sleeve 210 and the second sleeve 220 are thin-walled tubular structures and include flanged portions (a first flanged portion 211 and a second flanged portion 221). The first flanged portion 211 is located in the first positioning groove 211, and the second flanged portion 221 is located in the second positioning groove 131. The first flanged portion 211 is welded to the first side wall portion 120, and the second flanged portion 221 is welded to the second side wall portion 130.

[0058] The valve core component 50 includes a valve core 500 and a piston 600 (a first piston 610 and a second piston 620). The sidewalls 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 chamber 110, the first outer wall portion 511 mates with the first inner wall portion 111, the second outer wall portion 512 mates with the second inner wall portion 112, the third outer wall portion 513 mates with the third inner wall portion 113, and the fourth outer wall portion 514 mates with the fourth inner wall portion 114.

[0059] The piston 600 includes a first piston 610 and a second piston 620. The first piston 610 is connected to the valve core 500 via a first connecting member 810, and the second piston 620 is connected to the valve core 500 via a second connecting member 820. The first sleeve 210 includes a first piston chamber 212, and the second sleeve 220 includes a second piston chamber 222. The first piston 610 is slidably located in the first piston chamber 212, and the second piston 620 is slidably located in the second piston chamber 222.

[0060] The reversing valve of the above technical solution can make the overall structure of the valve body component compact by matching the four outer walls of the valve core with the four inner walls of the valve cavity and welding the flange of the sleeve to the annular positioning groove of the side wall of the valve body.

[0061] As a further extension of the above-mentioned technical solution, the outer edge of the cylindrical valve body 100 includes a circular outer edge portion 310, which serves as the main body area, 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 circular 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.

[0062] 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 100. The first connection port 321 and the third connection port 323 are coaxially arranged, while the second connection port 322 and the fourth connection port 324 are coaxially arranged. Similarly, there are four recessed connection portions 330, located between each 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.

[0063] The reversing valve of the above technical solution can make the overall structure more compact by forming a connection port portion integrally on the valve body, thereby increasing the pressure resistance of the cavity and reducing the risk of leakage in the welding connection of the two materials.

[0064] Figure 6 for Figure 1 An enlarged schematic diagram of the middle connection port area and the connection position of the connecting pipe.

[0065] like Figure 6 Shown and referenced Figure 1 and Figure 2 As a further development of the above technical solution, the valve body component 10 further includes four connecting pipes 400 , namely a first connecting pipe 410 , a second connecting pipe 420 , a third connecting pipe 430 , and a fourth connecting pipe 440 , each connecting pipe 400 being butt-welded to a corresponding connecting port 320 .

[0066] Specifically, each connection port 320 is generally cylindrical, with its upper end including a first flat surface 301, and the lower end of each connection tube 400 including a second flat surface 401. When each connection tube 400 is welded to the valve body 100, the first flat surface 301 and the second flat surface 401 are first brought into contact with each other, and then laser welding is performed on the outer edges of the first and second flat surfaces 301 and 401. This planar contact welding simplifies the laser welding process and improves weld quality.

[0067] As a further extension of the technical solution, the valve body 100 can be made of carbon steel (such as Q355B), which is relatively inexpensive and has good processability, while the connecting pipe 400 is made of stainless steel, which has a relatively high strength. By setting the outer diameter of the upper end of each connection port 320 to D2 and the outer diameter of the lower end of each connecting pipe 400 to D1, the condition D2 - D1 ≥ 0.2 mm is satisfied. By controlling the difference between the upper diameter D2 of the carbon steel and the lower diameter D1 of the stainless steel, laser welding can be controlled and the weld quality can be stabilized.

[0068] As an extension of further technical solutions, such as Figure 6 As shown, each recessed connection portion 330 on the valve body 100 is arranged around the corresponding connection port portion 320 and includes a concave tapered surface 331 extending toward the connection port portion 330 and a bottom surface 332. The bottom surface 332 is connected to the outer circumferential surface of the connection port portion 320. The top of the concave tapered surface 331 is connected to the outer edge portion 310. The upper end surface of the connection port portion 320 is no higher than the top of the concave tapered surface 331. That is, there is a distance H between the upper end surface of the connection port portion 320 and the top of the concave tapered surface 331. This design can fully utilize the material of the valve body for processing and molding, reducing costs.

[0069] As a further extension of the technical solution provided by the present invention, Figure 2 As shown, the valve body 100 has a first cylindrical portion 311 and a second cylindrical portion 312 formed on both sides of the outer edge portion 310. The first side wall portion 120 is a part of the first cylindrical portion 311, and the second side wall portion 130 is a part of the second cylindrical portion 312.

[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) includes a valve body (100), a first sleeve (210) and a second sleeve (220), the valve body (100) has a valve cavity (110), the valve body (100) includes a first inner wall portion (111), a second inner wall portion (112), a third inner wall portion (113), a first side wall portion (120) and a second side wall portion (130), the first inner wall portion (111), the second inner wall portion (112) and the third inner wall portion (113) serving as the cavity wall of the valve cavity (110), the first sleeve (210) includes a first flange portion (211) and a second flange portion (213) 1), the second sleeve (220) includes a second flange portion (221), the first side wall portion (120) includes a first annular positioning groove (121), the second side wall portion (130) includes a second annular positioning groove (131), the first flange portion (211) is located in the first annular positioning groove (121), the second flange portion (221) is located in the second annular positioning groove (131), 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); The valve core component (50) includes a valve core (500), a first piston (610) and a second piston (620); the valve core (500) includes a first outer wall portion (511), a second outer wall portion (512) and a third outer wall portion (513); 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); The first sleeve (210) has a first piston chamber (212), and the first piston chamber (212) is connected to the valve chamber (110). The second sleeve (220) has a second piston chamber (222), and the second piston chamber (222) is connected to 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). The first piston (610) is connected to the valve core (500), and the second piston (620) is connected to the valve core (500).

2. The reversing valve according to claim 1, wherein: The valve body (100) further includes a fourth inner wall portion (114), the fourth inner wall portion (114) serving as a cavity wall of the valve cavity (110), and the valve core (500) further includes a fourth outer wall portion (514), the fourth outer wall portion (514) cooperating with the fourth inner wall portion (114); The valve cavity (110) is a square cavity, and 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) constitute four side walls of the square cavity.

3. The reversing valve according to claim 2, characterized in that: 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.

4. The reversing valve according to claim 3, 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).

5. The reversing valve according to claim 4, characterized in that: The valve core (500) further 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 located at the first reversing position, the first inlet channel (520) connects the communicating cavity of the first connection port portion (321) with the communicating cavity of the third connection port portion (323), and the first reversing channel (540) connects the communicating cavity of the second connection port portion (322) with the communicating 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 cavity of the first connection port portion (321) with the communicating cavity of the fourth connection port portion (324), and the second reversing channel (550) connects the communicating cavity of the second connection port portion (322) with the communicating cavity of the third connection port portion (323).

6. The reversing valve according to claim 4, characterized in that: The valve body component (10) further comprises connecting pipes (400), and there are four connecting pipes (400). Each connecting pipe (400) is butt-welded to the corresponding connecting port portion (320).

7. The reversing valve according to claim 6, characterized in that: The recessed connection portion (330) comprises a bottom surface (332) and a concave conical surface (331); the bottom surface (332) is connected to the outer circular surface of the connection port portion (320); the top end of the concave conical surface (331) is connected to the outer edge portion (310); the upper end surface of the connection port portion (320) is not higher than the top end of the concave conical surface (331); and the connection pipe (400) is connected to the connection port portion (320) by laser welding.

8. The reversing valve according to claim 7, characterized in that: The upper end of the connection port portion (320) includes a first planar portion (301), and the lower end of the connection pipe (400) includes a second planar portion (401). The first planar portion (301) and the second planar portion (401) are in contact and fit with each other, and the outer edge of the first planar portion (301) and the outer edge of the second planar portion (401) serve as a laser welding area.

9. The reversing valve according to claim 7 or 8, characterized in that: The valve body (100) is made of carbon steel, and the connecting pipe (400) is made of stainless steel. If the outer diameter of the upper end of the connecting port (320) is set to D2, and the outer diameter of the lower end of the connecting pipe (400) is set to D1, then the following condition is satisfied: D2-D1≥0.2mm.

10. The reversing valve according to claim 3, wherein: The outer edge portion (310) includes a cylindrical portion, and the first side wall portion (120) and the second side wall portion (130) include at least a portion of the cylindrical portion.

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