Reversing valve

Abstract

The invention provides a reversing valve which comprises a valve body part and a valve core part, the valve body part comprises a valve body, and the reversing valve is characterized in that the valve body comprises an outer edge part, a connecting port part and a concave connecting part, the concave connecting part is located between the outer edge part and the connecting port part, the concave connecting part surrounds the connecting port part, and the outer edge part is connected with the connecting port part. The outer edge part, the connecting port part and the concave connecting part are of an integrated structure. According to the reversing valve, the overall structure can be compact.

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 discloses 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 core component comprises a valve core, and the valve core is located in the valve cavity; the valve body comprises an outer edge portion, a connection port portion and a recessed connection portion, the recessed connection portion is located between the outer edge portion and the connection port portion, the recessed connection portion surrounds the connection port portion, and the outer edge portion, the connection port portion and the recessed connection portion are an integrated structure.

[0004] The reversing valve provided by the present invention can make the overall structure of the valve body compact by integrally forming the outer edge portion, the connection port portion and the recessed connection portion on the valve body, thereby reducing the risk of valve cavity leakage that may occur due to welding connection of the two materials of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 : A structural schematic diagram of a reversing valve provided by the present invention;

[0006] Figure 2 : Figure 1 A three-dimensional diagram of the middle valve body and the connecting pipe after being fixed;

[0007] Figure 3 : Figure 1 A three-dimensional schematic diagram of the middle sleeve;

[0008] Figure 4 : Figure 1 The three-dimensional structure diagram of the middle valve core component;

[0009] Figure 5 : Figure 4 Schematic diagram of the cross-section structure of the middle valve core flow channel structure;

[0010] Figure 6 : Figure 1An enlarged schematic diagram of the middle connection port area and the connection position of the connecting pipe. Figures 1-6 Explanation of symbols:

[0011] 1- reversing valve;

[0012] 10-valve body parts;

[0013] 100-valve body;

[0014] 110-valve chamber;

[0015] 111-first inner wall portion, 112-second inner wall portion;

[0016] 113 - third inner wall portion, 114 - fourth inner wall portion;

[0017] 120 - first side wall portion, 121 - first positioning groove;

[0018] 130 - second side wall portion, 131 - second positioning groove;

[0019] 200-sleeve;

[0020] 210-first sleeve;

[0021] 212 - first piston chamber;

[0022] 220-second sleeve;

[0023] 222 - second piston chamber;

[0024] 310-outer edge;

[0025] 311-first cylindrical portion, 312-second cylindrical portion;

[0026] 320-connection port;

[0027] 321 - first connection port, 322 - second connection port;

[0028] 323 - third connection port, 324 - fourth connection port;

[0029] 301- first plane portion;

[0030] 302- communicating cavity;

[0031] 330-recessed connecting portion;

[0032] 331-concave cone surface, 332-bottom surface;

[0033] 400-connecting pipe;

[0034] 401- second plane portion;

[0035] 410 - first connecting pipe, 420 - second connecting pipe;

[0036] 430 - third connecting pipe, 440 - fourth connecting pipe;

[0037] 50-valve core component;

[0038] 500-valve core;

[0039] 511-first outer wall portion, 512-second outer wall portion;

[0040] 513 - third outer wall portion, 514 - fourth outer wall portion;

[0041] 520-first inlet channel, 530-second inlet channel;

[0042] 540-first reversing channel, 550-second reversing channel;

[0043] 600-piston;

[0044] 610-first piston;

[0045] 620-second piston;

[0046] 800-connector;

[0047] 810-first connecting member; 820-second connecting member. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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 . The valve body component 10 includes a valve body 100 , which has a valve cavity 110 . The valve core component 50 includes a valve core 500 , which is located in the valve cavity 110 .

[0051] The valve body 100 is generally cylindrical, comprising a circular outer edge portion 310 as the main body, 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. Specifically, the circular outer edge portion 310, the connection port portion 320, and the recessed connection portion 330 are integrally formed from the same material. By recessing the circular outer edge portion of the valve body inward to form the recessed connection portion, the central tubular structure of the connection port portion is also formed.

[0052] The reversing valve of the above technical solution can make the overall structure of the valve body compact by integrally forming the connection port portion 320 on the valve body, thereby avoiding the hidden danger of valve cavity leakage that may occur when the valve body is connected by welding two pieces of material.

[0053] As an extension of the further technical solution, the valve cavity 110 is a square cavity having 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 , and the above four inner portions constitute the four side walls of the square cavity.

[0054] 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, with the first connection port 321 and the third connection port 323 coaxially disposed, and the second connection port 322 and the fourth connection port 324 coaxially disposed. Similarly, there are four recessed connection portions 330, located between each connection port 320 and the outer edge portion 310, with each recessed connection portion 330 surrounding the corresponding connection port 320. The connecting cavity 302 of the first connection port portion 321 extends to the inner wall surface of the first inner wall portion 111, the connecting cavity 302 of the second connection port portion 322 extends to the inner wall surface of the second inner wall portion 112, the connecting cavity 302 of the third connection port portion 323 extends to the inner wall surface of the third inner wall portion 113, and the connecting cavity 302 of the fourth connection port portion 324 extends to the inner wall surface of the fourth inner wall portion 114.

[0055] 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.

[0056] In the above technical solution, due to the square valve cavity hole, the valve body entity can utilize the excess thickness material in the four directions of the outer edge to design an integrated connection port portion, which has a compact structure without reducing the pressure resistance of the valve cavity.

[0057] Figure 6 for Figure 1 An enlarged schematic diagram of the middle connection port area and the connection position of the connecting pipe.

[0058] 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 .

[0059] 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.

[0060] 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 upper end of each connecting pipe 400 to D1, the condition D2 - D1 ≥ 0.2 mm is satisfied. By controlling the difference between the lower diameter D2 of the carbon steel and the upper diameter D1 of the stainless steel, laser welding can be controlled and the weld quality can be stabilized.

[0061] As an extension of further technical solutions, such as Figure 6As shown, each concave connection portion 330 on the valve body 100 is arranged around the corresponding connection port portion 320, including a concave conical surface 331 extending toward the connection port portion 330 and a bottom surface 332, the bottom surface 332 is connected to the outer circular surface of the connection port portion 320, the top of the concave conical surface (331) is connected to the outer edge portion (310), and the upper end surface of the connection port portion 320 is not higher than the top of the concave conical 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 conical surface 331. Such a design can fully utilize the material of the valve body for processing and molding, thereby reducing costs.

[0062] As an extension of the further technical solution, the outer edge of the valve body 100 includes a first side wall portion 120 and a second side wall portion 130, and the valve body component 10 also includes a sleeve 200 (a first sleeve 210, a second sleeve 220), the first sleeve 210 is a thin-walled tubular structure and is welded and fixed to the first side wall portion 120; the second sleeve 220 is a thin-walled tubular structure and is welded and fixed to the second side wall portion 130.

[0063] The valve core component 50 further includes a first piston 610 and a second piston 620. The first piston 610 is connected to the valve core 500 via a first connector 810, and the second piston 620 is connected to the valve core 500 via a second connector 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.

[0064] The reversing valve of the above technical solution can make the overall structure 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.

[0065] 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.

[0066] 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.

[0067] 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), wherein the valve body component (10) comprises a valve body (100), the valve body (100) having a valve cavity (110), the valve core component (50) comprises a valve core (500), and the valve core (500) is located in the valve cavity (110), characterized in that: The valve body (100) includes an outer edge portion (310), a connection port portion (320) and a recessed connection portion (330), wherein the recessed connection portion (330) is located between the outer edge portion (310) and the connection port portion (320), and 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.

2. The reversing valve according to claim 1, wherein: The valve body component (10) further comprises a connecting pipe (400), and the connecting pipe (400) is welded to the connecting port portion (320).

3. The reversing valve according to claim 2, 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.

4. The reversing valve according to claim 2, wherein: The valve body (100) is made of carbon steel, and the connecting pipe (400) is made of stainless steel.

5. The reversing valve according to claim 2, wherein: 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.

6. The reversing valve according to claim 5, characterized in that: If the outer diameter of the upper end of the connection port (320) is set to D2 and the outer diameter of the lower end of the connection pipe (400) is set to D1, then the following condition is satisfied: D2-D1≥0.2mm.

7. The reversing valve according to any one of claims 2 to 6, characterized in that: The valve chamber (110) 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); 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), 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).

8. The reversing valve according to claim 7, characterized in that: There are four connecting pipes (400); there are four connecting port portions (320), including a first connecting port portion (321), a second connecting port portion (322), a third connecting port portion (323) and a fourth connecting port portion (324), and each of the connecting port portions (320) is evenly distributed along the circumference of the valve body (100), the communicating cavity of the first connecting port portion (321) extends to the inner wall surface of the first inner wall portion (111), the communicating cavity of the second connecting port portion (322) extends to the inner wall surface of the second inner wall portion (112), the communicating cavity of the third connecting port portion (323) extends to the inner wall surface of the third inner wall portion (113), and the communicating cavity of the fourth connecting port portion (324) extends to the inner wall surface of the fourth inner wall portion (114).

9. The reversing valve according to claim 8, characterized in that: The valve body component (10) further includes a first sleeve (210) and a second sleeve (220), wherein the first sleeve (210) is welded and fixed to the valve body (100), and the second sleeve (220) is welded and fixed to the valve body (100); the valve core component (50) further includes a first piston (610) and a second piston (620), wherein the first piston (610) is connected to the valve core (500), and the second piston (620) is connected to the valve core (500); The first sleeve (210) has a first piston chamber (212), which is connected to the valve chamber (110); the second sleeve (220) has a second piston chamber (222), which 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).

10. The reversing valve according to claim 9, 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 a 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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