Solenoid valve with sight glass

Abstract

A solenoid valve with a sight glass (100). The solenoid valve with a sight glass (100) includes a valve body assembly (1), a solenoid assembly (50), and a sight glass (12), the valve body assembly (1) includes a valve seat (10), within the valve seat (10) is a valve chamber (15), the solenoid assembly (50) has a piston (56) with one end movable within the chamber of the valve seat (10), the piston (56) causes the fluid in the valve chamber (15) to maintain a flowing state or a blocked state, and the sight glass (12) is mounted on the valve seat (10) and is integral with the valve seat (10).

Description

Technical Field

[0001] Related Applications This application claims the priority of a Chinese patent application with an application number of 202220845339.1 and a title of "Solenoid Valve with Site Glass" filed on April 13, 2022, and the priority of a Chinese patent application with an application number of 202220843621.6 and a title of "Solenoid Valve with Site Glass" filed on April 13, 2022, and incorporates the full text thereof by reference herein.

[0002] This application relates to the technical field of valves, and in particular, to a solenoid valve with site glass.

Background Art

[0003] Site glass is an important component in a cooling system circuit. When using the high-temperature sintering process of glass and steel components, site glass products have beautiful appearance, high strength, and high transparency of the glass. Site glass is used in various cooling equipment, machines such as compressors, etc. Since the operating principle of site glass is to visually observe the refrigerant in the system through a wide-angle viewing window, it is easy to observe the bubbles or flash gas in the system and confirm whether the dosage of the refrigerant is appropriate or needs to be filled. The indicator element of site glass is highly sensitive to moisture and changes color according to the change of the moisture content in the system.

[0004] However, the valves and site glass used in the cooling system circuit in the prior art are two separate products. During the use process, the valve and the site glass need to be connected in series and welded for use, and then the whole thing connected in series and welded between the valve and the site glass needs to be welded to the pipeline. Therefore, the number of welding points is large, the process is complicated, and the occupied space is large.

Summary of the Invention

[0005] Various embodiments of this application provide a solenoid valve with a sight glass, which includes a valve body assembly, an electromagnetic assembly, and a sight glass.

[0006] The valve assembly includes the valve seat, and the inside of the valve seat is the valve chamber.

[0007] The electromagnetic assembly is a piston, one end of which is movable within the valve seat chamber, and the piston maintains a flowing or blocked state of the fluid within the valve chamber.

[0008] The sight glass is mounted on the valve seat and is integrated with the valve seat.

[0009] In one embodiment, the ends of the valve seat are a liquid inlet and a liquid outlet, respectively, and the sight glass is provided at either the liquid inlet or the liquid outlet.

[0010] In one embodiment, the sight glass viewing chamber is connected to the valve chamber.

[0011] In one embodiment, the valve assembly further includes a valve cover provided on the valve seat, the valve chamber has a liquid inlet chamber and a liquid outlet chamber, and liquid inlets and liquid outlets communicating with the valve chamber are provided at both ends of the valve seat, respectively.

[0012] A containment chamber is provided within the valve seat, and a valve port is provided at the upper end of the containment chamber. The liquid inlet chamber is the chamber from the liquid inlet to the valve port, and the liquid outlet chamber is the chamber from the valve port to the liquid outlet. The liquid inlet chamber communicates with the liquid outlet chamber via the valve port.

[0013] In one embodiment, the sight glass includes a base and a lens, a viewing chamber is drilled in the base, the lens is provided in the base, and the viewing chamber communicates with a liquid outlet chamber and / or a liquid inlet chamber.

[0014] In one embodiment, a mounting holder is provided inside the viewing chamber, and the mounting holder is used to set the test paper.

[0015] In one embodiment, a first stepped surface is provided inside the base, a second stepped surface is provided on the outer edge of the base, and the lens is mounted in the accommodating space between the first and second stepped surfaces.

[0016] In one embodiment, there is a through-hole at the bottom of the containment chamber, which communicates with the liquid outlet, and the liquid outlet chamber has an L-shaped tubular space structure.

[0017] In one embodiment, an inlet is provided on the side of the sight glass closest to the liquid outlet, and an outlet is provided on the side of the sight glass away from the liquid outlet. Both the inlet and the outlet communicate with a viewing chamber, and the inlet communicates with the liquid outlet.

[0018] In one embodiment, the axes of the liquid inlet, liquid outlet, inlet, and outlet all lie on the same straight line.

[0019] In one embodiment, the valve port faces an electromagnetic assembly, and when the valve port contacts the piston, communication between the liquid outlet chamber and the liquid inlet chamber is blocked, and when the piston moves away from the valve port, the liquid outlet chamber communicates with the liquid inlet chamber.

[0020] In one embodiment, the electromagnetic assembly includes a fixed core, a first spring, a movable core, a second spring, and a piston, arranged in order toward the valve opening, the fixed core, the first spring, the movable core, and the second spring being housed within a sleeve, and the piston being connected to the movable core via the second spring.

[0021] In one embodiment, the piston includes a transmission rod, an upper packing, a diaphragm, and a lower packing.

[0022] The upper and lower packings are rigid sheets, and the diaphragm is an elastic sheet. The upper packing, diaphragm, and lower packing are arranged coaxially in order at the end of the transmission rod closest to the valve opening, along the direction toward the valve opening, and the other end of the transmission rod away from the valve opening abuts against the second spring.

[0023] In one embodiment, the diameter of the upper packing is adapted to the outer diameter of the movable iron core, the diameter of the lower packing is smaller than the inner diameter of the valve port, and the diameter of the diaphragm is larger than the outer diameter of the valve port.

[0024] In one embodiment, a sealing chamber is formed between the diaphragm and the valve cover by bridging the edge of the diaphragm over the valve seat and the edge of the diaphragm being in close contact with the valve cover.

[0025] Details of one or more embodiments of the present application are presented in the following drawings and description. Other features, objects, and advantages of the present application will become apparent from the specification, drawings, and claims.

Brief Description of the Drawings

[0026] To better describe and explain the embodiments and / or exemplifications of these inventions disclosed herein, one or more drawings can be referred to. Additional details or exemplifications used to explain the drawings should not be considered as limiting the scope of any of the disclosed inventions, the embodiments and / or exemplifications described herein, and the optimal forms of these inventions understood herein.

[0027] [Figure 1] It is a structural diagram of a solenoid valve with a sight glass according to one or more embodiments. [Figure 2A] It is a cross-sectional view of a solenoid valve with a sight glass according to one or more embodiments. [Figure 2B] It is a partially enlarged cross-sectional view of the solenoid valve with a sight glass in FIG. 2A. [Figure 3] It is a structural diagram of the valve seat and sight glass of a solenoid valve with a sight glass according to one or more embodiments. [Figure 4] It is a cross-sectional view of the valve seat and sight glass of a solenoid valve with a sight glass according to one or more embodiments. [Figure 5] It is a structural diagram of a solenoid valve with a sight glass according to one or more embodiments. [Figure 6]This is a structural diagram of the valve seat in a solenoid valve with a sight glass, according to one or more embodiments. [Figure 7] This is a cross-sectional view of a solenoid valve with a sight glass according to one or more embodiments. [Figure 8] This is a longitudinal cross-sectional view of a solenoid valve with a sight glass according to one or more embodiments. [Figure 9] Figure 8 is a partially enlarged view of the cross-sectional view of a solenoid valve with a sight glass.

[0028] 100 Solenoid valve with sight glass, 1 valve body assembly, 15 valve chamber, 111 through hole, 10 valve seat, 11 housing chamber, 110 valve port, 12 sight glass, 121 lens, 122 base, 1220 viewing window, 1221 first stepped surface, 1222 second stepped surface, 123 inlet, 124 outlet, 125 mounting holder, 13 liquid inlet, 14 liquid outlet, 20 valve cover, 30 liquid inlet pipe, 40 liquid outlet pipe, 120 viewing chamber, 130 liquid inlet chamber, 140 liquid outlet chamber, 50 solenoid assembly, 51 sleeve, 52 fixed core, 53 first spring, 54 movable core, 541 first housing chamber, 542 second housing chamber, 55 second spring, 56 piston, 561 transmission rod, 562 Upper packing, 563 diaphragm, 5631 sealing chamber, 564 lower packing, 565 pin, 57 support seat. [Modes for carrying out the invention]

[0029] To make the above-mentioned objectives, features, and advantages of this application clearer and easier to understand, specific embodiments of this application will be described in detail below with reference to the drawings. In the following description, various specific details will be explained in order to make this application easier to understand. However, this application can be carried out in many other forms different from those described herein, and a person skilled in the art can make similar improvements as long as they do not contradict the content of this application, so this application is not limited by the specific embodiments disclosed below.

[0030] In the description of this application, terms such as "center," "vertical," "horizontal," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "perpendicular," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings. These terms are merely for the purpose of making the description of this application easier to understand and simplifying the explanation, and do not indicate or imply that the shown devices or elements necessarily have a specific direction or must be configured and operated in a specific direction. Therefore, it should be understood that these terms should not be understood as limiting this application.

[0031] Furthermore, the terms “first” and “second” are used solely for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly specifying the number of technical features described. Thus, features limited by “first” and “second” may explicitly or implicitly include one or more of those features. In this description, “multiple” means two or more unless explicitly limited.

[0032] In this application, unless otherwise explicitly stated or limited, terms such as “attach,” “connect,” “connect,” and “fix” should be understood in a broad sense. For example, they may be fixedly connected, detachably connected, or integrally connected. They may be mechanically connected or electrically connected. They may be directly connected, indirectly connected via an intermediate member, or communicate within the two elements themselves. A person skilled in the art will be able to understand the specific meaning of the above terms in this application, depending on the specific situation.

[0033] In this application, unless otherwise explicitly stated or limited, the presence of a first feature "above" or "below" a second feature may mean that the first and second features are in direct contact, or that they are indirectly in contact through an intermediate medium. Furthermore, the presence of a first feature "above," "above," and "upper side" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply that the horizontal height of the first feature is greater than that of the second feature. The presence of a first feature "below," "below," and "below side" of a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply that the horizontal height of the first feature is lower than that of the second feature.

[0034] It should be noted that when an assembly is described as being "fixed" or "attached" to another assembly, it may be directly fixed to the other assembly, or there may be an intervening assembly. When an assembly is described as being "connected" to another assembly, it may be directly connected to the other assembly, or there may be an intervening assembly simultaneously. The terms “vertical,” “horizontal,” “up,” “down,” “left,” and “right” and similar expressions used in this specification are for illustrative purposes only and do not indicate that they represent only one embodiment.

[0035] Referring to Figures 1, 2A, and 5, Figures 1, 2A, and 5 show structural diagrams of a solenoid valve 100 with a sight glass in an embodiment of the present application, the solenoid valve 100 with a sight glass provided by the embodiment of the present application includes a valve body assembly 1, a sight glass 12, and an electromagnetic assembly 50. The sight glass 12, valve body assembly 1, and electromagnetic assembly 50 are integral and are manufactured using an integral form.

[0036] The valve assembly 1 includes a valve seat 10 and a valve cover 20 provided on the valve seat 10. A sealing member is further provided between the valve cover 20 and the valve seat 10 to prevent the medium inside the valve seat 10 from flowing out through the gap between the valve cover 20 and the valve seat 10, thereby improving the sealing reliability of the valve assembly 1. Optionally, the sealing member is made of a polytetrafluoroethylene material, i.e., a polytetrafluoroethylene ring.

[0037] The solenoid valve 100 with a sight glass, as described above, integrates the sight glass 12 and the valve seat 10 into a single structure, allowing for direct observation of the state of the medium within the solenoid valve 100. This simplifies the assembly process, reduces manufacturing costs, improves product integration, reduces the number of valve components used in the system, and simplifies the system's pipeline layout.

[0038] Referring to Figures 2B, 3, 6, and 7, the valve seat 10 is provided with a liquid inlet 13 and a liquid outlet 14 at both ends, a liquid inlet pipe 30 connected to the liquid inlet 13, a valve chamber 15 inside the valve seat 10 which includes a liquid outlet chamber 140 and a liquid inlet chamber 130. Inside the valve seat 10 is a housing chamber 11 which has a valve opening 110 facing the valve cover 20, and a through hole 111 communicating with the liquid outlet 14 is provided at the bottom of the housing chamber 11. The valve opening 110 connects the liquid inlet 13 and the liquid outlet 14. The liquid outlet 14 communicates with the liquid outlet pipe 40, and the liquid inlet 13 communicates with the liquid inlet pipe 30. The portion of the valve chamber 15 from the liquid inlet 13 to the valve port 110 is the liquid inlet chamber 130, and the portion of the valve chamber 15 from the valve port 110 to the liquid outlet 14 is the liquid outlet chamber 140. By controlling the opening and closing of the valve port 110, the conduction / disconnection between the liquid inlet chamber 130 and the liquid outlet chamber 140 is controlled. The valve port 110 fits into an electromagnetic assembly 50, which controls the open and closed state of the valve port 110. Optionally, the valve seat 10 may be made of a highly ductile brass material, or it may be manufactured from steel by a machining process.

[0039] In some embodiments, as shown in Figures 2A, 3, and 4, the sight glass 12 is provided at the end of the solenoid valve 100 with the sight glass. Specifically, the sight glass 12 is provided at the liquid outlet 14 or the liquid inlet 13. The sight glass 12 is integrated with the valve seat 10. In this embodiment, the sight glass 12 is provided at the liquid outlet 14, and the sight glass 12 as a whole has a cylindrical structure that opens upward, and the hollow space of the sight glass 12 is a viewing chamber 120. An inlet 123 and an outlet 124 are provided on both sides of the sight glass 12, respectively, with the inlet 123 communicating with the liquid outlet 14, i.e., the viewing chamber 120 communicating with the liquid outlet chamber 140.

[0040] The sight glass 12 includes a base 122 and a lens 121 mounted within the base 122. The upper end of the sight glass 12 extends upward to form an annular base 122, and the intermediate space of the base 122 is a viewing window 1220 communicating with the viewing chamber 120. A first stepped surface 1221 is provided within the base 122, and a second stepped surface 1222 is provided on the outer edge of the base 122. The lens 121 is mounted in the space between the first stepped surface 1221 and the second stepped surface 1222. The lens 121 allows for direct observation of the flow state of the medium and the liquid level of the medium in the viewing chamber 120, thereby confirming whether the amount of medium needs to be filled. By mounting the lens 121 horizontally within the base 122, the refraction of light that would occur if the lens 121 were mounted at an angle is avoided, which would make it difficult to accurately determine the liquid level of the medium in the sight glass 12. The liquid outlet chamber 140 has an L-shaped tubular structure, so that the medium entering the liquid outlet chamber 140 flows directly along the liquid outlet chamber 140 to the sight glass 12, thereby avoiding the generation of turbulence or vortices that would occur if the medium entered a chamber of a different shape or complex chamber, which would make it difficult to observe the flow state of the medium in the sight glass 12.

[0041] This application provides a sight glass 120 at the liquid inlet 13 or liquid outlet 14 of the valve assembly, so that the medium enters the sight glass 12 directly after leaving the liquid outlet chamber 140. The sight glass allows observation of the entire fluid flow within the valve chamber, making it easier to observe the flow state of the medium and reducing errors in flow rate detection. At the same time, the size of the sight glass 120 is not limited by the dimensions of the valve assembly 1.

[0042] By arranging the liquid inlet 13, liquid outlet 14, inlet 123, and outlet 124 on the same axis, turbulence or vortices are prevented from forming in the viewing chamber 120 after the medium enters the sight glass 12, which would make it difficult to observe the flow state of the medium. Outlet 124 communicates with the liquid outlet pipe 40. Since the horizontal height of the lens 121 is less than or equal to the horizontal height of the valve cover 20, the overall structure of this invention is harmonious and has a beautiful and elegant appearance.

[0043] In some embodiments, as shown in Figures 6 and 8, the sight glass 12 is located in the middle of the solenoid valve 100 with the sight glass. Specifically, the sight glass 12 includes a base 122 and a lens 121, with the base 122 extending outward from one side of the outer wall of the valve seat 10, and the base 122 having a viewing window 1220 that leads to the liquid inlet chamber 130, the viewing chamber 120 being drilled inside the base 122, a first stepped surface 1221 being provided inside the base 122, a second stepped surface 1222 being provided on the outer edge of the base, the lens 121 being attached to the first stepped surface 1221, and the viewing chamber 120 communicating with the liquid inlet chamber 130, thereby allowing direct observation of the flow state of the medium, the liquid level of the medium in the valve assembly 1, etc., through the lens 121 to confirm whether the amount of medium is appropriate, whether it needs to be filled, etc.

[0044] By providing the sight glass 12 on the valve seat 10, the chamber of the sight glass 12 and the valve chamber 15 are connected, improving the overall balancing performance of the solenoid valve 100, stabilizing the center of gravity, and facilitating manufacturing. At the same time, because a portion of the housing of the sight glass 12 and a portion of the housing of the solenoid valve 100 overlap, the housing of the solenoid valve 100 can support the housing of the sight glass 12, reducing the weight of the product and saving costs.

[0045] Optionally, the lens 121 is mounted within the base 122 by crimping, and the edge of the base 122 is flanged toward the center of the lens 121 by an external force, so that the base 122 has sufficient prepressure against the lens 121, preventing the lens 121 from detaching from the base 122, and ensuring the airtightness of the viewing chamber 120. Optionally, the lens 121 is made of glass (e.g., soda-lime glass or high-borosilicate glass) or other transparent materials in the art, such as resin. The lens 121 may be entirely transparent or partially transparent, and is not limited thereto.

[0046] Furthermore, referring to Figures 8 and 9, in some embodiments, a mounting holder 125 is provided inside the viewing chamber 120, which is used to set the test paper, allowing the test paper to be directly observed through the lens 121. The test paper is used to measure the moisture content in the medium, and the test paper shows corresponding color changes under different moisture content levels of the medium, allowing for a rough indication of the moisture content of the medium.

[0047] As shown in Figures 1, 2A, and 2B, the valve port 110 has its opening facing the valve cover 20, and a mounting hole is provided in the valve cover 20 at a position corresponding to the valve port 110. A sleeve 51 is provided inside this mounting hole, with one end of the sleeve 51 facing the valve port 110, and the other end of the sleeve 51 facing the valve port 110 is installed inside the mounting hole such that the inside of the sleeve 51 communicates with the valve chamber 15. Optionally, screw / bolt connections or the like are used where the valve cover 20 and the valve seat 10 engage and are butt-jointed.

[0048] As shown in Figures 2A, 2B, and 8, the electromagnetic assembly 50 includes a piston 56 that is movably mounted within the valve seat 10. The piston 56 can control the opening and closing of the valve port 110. When the piston 56 contacts the valve port 110, communication between the liquid outlet chamber 140 and the liquid inlet chamber 130 is cut off, and when the piston 56 moves away from the valve port 110, the liquid outlet chamber 140 communicates with the liquid inlet chamber 130.

[0049] The electromagnetic assembly 50 further includes a sleeve 51, and a fixed core 52, a first spring 53, a movable core 54, and a second spring 55 arranged in order from top to bottom inside the sleeve 51.

[0050] The fixed core 52 is fixedly provided at one end of the sleeve 51 away from the valve seat 10, and the movable core 54 can move freely within the sleeve 51 in a direction toward or away from the fixed core 52. When the fixed core 52 is energized, the movable core 54 moves relative to the fixed core 52 and is attracted to it. The first spring 53 is in contact with the fixed core 52 and the movable core 54, and there is an open first housing chamber 541 at one end of the movable core 54 facing the fixed core 52. In its natural state, a portion of the first spring 53 is housed in this first housing chamber 541, and the first housing chamber 541 guides the expansion and contraction of the first spring 53, thereby preventing the first spring 53 from rattling along the radial direction of the sleeve 51. As the movable core 54 moves toward the fixed core 52 until it contacts the fixed core 52, the first spring 53 is gradually compressed until it is fully housed within the first housing chamber 541. One end of the second spring 55 contacts the movable core 54, and the other end extends outside the sleeve 51 and contacts the piston 56. At the end of the movable core 54 facing the valve port 110 is an open second housing chamber 542, and in its natural state, the second spring 55 is partially housed within this second housing chamber 542. As the movable core 54 moves away from the fixed core 52 until it contacts the piston 56, the second spring 55 is gradually compressed until it is fully housed within the second housing chamber 542. Because the elastic modulus of the second spring 55 is smaller than that of the first spring 53, when the fixed core 52 is in an electrically depleted state, the first spring 53 acts on the movable core 54 to compress the second spring 55 into the second housing chamber 542, the movable core 54 comes into contact with the piston 56 and moves the piston 56 to the valve opening 110, the piston 56 seals the valve opening 110, and communication between the liquid inlet chamber 130 and the liquid outlet chamber 140 is cut off.

[0051] Specifically, after the fixed core 52 is energized and generates a magnetic force, when the magnetic force acting on the movable core 54 becomes greater than the elastic force of the first spring 53, the movable core 54 moves toward the fixed core 52 until it contacts the fixed core 52. After the pressure of the medium in the liquid inlet chamber 130 exceeds a threshold, the piston 56 compresses the second spring 55 under the action of the pressure of the medium in the liquid inlet chamber 130 and moves away from the valve opening 110, thereby opening the liquid inlet chamber 130 in communication with the liquid outlet chamber 140. When the fixed core 52 is de-energized, the fixed core 52 loses its magnetic force, and the movable core 54, under the force of the first spring 53, moves toward the piston 56 until it contacts the piston 56. When the piston 56 is pushed toward the valve opening 110 until it contacts the valve opening 110, the communication between the liquid inlet chamber 130 and the liquid outlet chamber 140 is cut off.

[0052] Furthermore, as shown in Figures 2A, 2B, 8, and 9, the piston 56 is a diaphragm-type piston, which includes a transmission rod 561, an upper packing 562, a diaphragm 563, and a lower packing 564. The upper packing 562, diaphragm 563, and lower packing 564 are sequentially provided coaxially at the end of the transmission rod 561 closest to the valve port 110, along the direction toward the valve port 110. A pin 565 passes through the lower packing 564, diaphragm 563, and upper packing 562 in sequence, fixing the lower packing 564, diaphragm 563, and upper packing 562 to the end of the transmission rod 561. The other end of the transmission rod 561, away from the valve port 110, abuts against the second spring 55. The diameter of the upper packing 562 matches the outer diameter of the movable core 54, and the diameter of the lower packing 564 is smaller than the inner diameter of the valve port 110. This makes it easier to house the lower packing 564 within the valve port 110 when the diaphragm 563 abuts against the valve port 110. The diameter of the diaphragm 563 is larger than the outer diameter of the valve port 110. This allows the diaphragm 563 to adequately seal the valve port 110. The upper packing 562 and the lower packing 564 are rigid sheets, and the diaphragm 563 is an elastic sheet. The upper packing 562 and the lower packing 564 sandwich the diaphragm 563 to prevent it from deforming excessively.

[0053] More specifically, after the fixed core 52 is energized and a magnetic force is generated, the movable core 54, under the influence of the magnetic force, overcomes the elastic force of the first spring 53 and moves toward the fixed core 52 until it contacts the fixed core 52. After the pressure of the medium in the liquid inlet chamber 130 exceeds a threshold, the diaphragm 563 deforms, and the diaphragm 563 moves the piston away from the valve opening 110, at which point the liquid inlet chamber 130 communicates with the liquid outlet chamber 140. When the fixed core 52 is out of power, it loses its magnetism, the movable core 54 moves toward the piston 56 under the action of the elastic force of the first spring 53, the second spring 55 is forced to fully house the movable core 54 in the second housing chamber 542 at the lower end of the movable core 54, the movable core 54 comes into direct contact with the upper packing 562, the diaphragm 563 moves toward the valve port 110 until it is driven by the upper packing 562 to make tight contact with the valve port 110, and communication between the liquid inlet chamber 130 and the liquid outlet chamber 140 is cut off.

[0054] As shown in Figures 2A, 2B, 8, and 9, the edge of the diaphragm 563 is stretched across the valve seat 10 and in close contact with the valve cover 20, thereby forming a sealed chamber 5631 between the diaphragm 563 and the valve cover 20. This prevents the medium inside the valve seat 10 from coming into contact with the components inside the sleeve 51, thus preventing the electromagnetic assembly 50 from being eroded by the medium. Optionally, the diaphragm 563 is made of a metallic material, such as stainless steel or manganese steel, which improves the pressure the diaphragm 563 can withstand at the valve port 110. The surface of the diaphragm 563 is further coated with a sealing coating layer, which is a non-metallic coating layer, thus improving the sealing performance of the diaphragm 563 and reducing its leakage rate. Optionally, the non-metallic coating layer may be either a Teflon coating layer or a silicone rubber coating layer.

[0055] As shown in Figures 2A, 2B, and 9, an annular support sheet 57 is provided below the diaphragm 563. This support sheet 57 is a rigid sheet, and its inner ring diameter is larger than the outer diameter of the valve opening 110. The outer ring diameter of the support sheet 57 matches the diameter of the diaphragm 563. A certain distance exists between the support sheet 57 and the diaphragm 563 to accommodate the deformation distance of the diaphragm 563 and to support the diaphragm 563 in the event of deformation. This prevents the diaphragm 563 from being excessively deformed and damaged. The support sheet 57 is provided with several perforations for the passage of the medium.

[0056] The technical features of the embodiments described above can be combined in any way, and for the sake of brevity, not all possible combinations of the technical features in the embodiments described above have been explained. However, as long as these combinations of technical features are inconsistent, they should all be considered to fall within the scope described herein.

[0057] The embodiments described above are merely examples of some embodiments of this application, and although their descriptions are relatively specific and detailed, they should not be understood as limiting the scope of the claims of this application. Those skilled in the art may make several modifications and improvements, provided they do not depart from the spirit of this application, and it should be noted that all of these fall within the scope of protection of this application. Therefore, the scope of protection of the patent of this application shall be in accordance with the attached claims.

Claims

1. Includes valve body assembly, electromagnetic assembly and sight glass, The valve assembly includes a valve seat, and the valve seat contains a valve chamber. The electromagnetic assembly has a piston at one end that is movable within the chamber of the valve seat, and the piston causes the fluid in the valve chamber to maintain a flow state or a blocked state. The sight glass is provided on the valve seat and is integral with the valve seat. The valve seat has two ends, which are a liquid inlet and a liquid outlet, respectively, and the sight glass is provided at either the liquid inlet or the liquid outlet, in a solenoid valve with a sight glass.

2. The solenoid valve with a sight glass according to claim 1, wherein the sight glass viewing chamber is in communication with the valve chamber.

3. The valve assembly further includes a valve cover provided on the valve seat, the valve chamber having a liquid inlet chamber and a liquid outlet chamber, and the valve seat is provided with a liquid inlet and a liquid outlet at both ends, communicating with the valve chamber, A solenoid valve with a sight glass according to claim 2, wherein a housing chamber is provided within the valve seat, a valve port is provided at the upper end of the housing chamber, the liquid inlet chamber is a chamber from the liquid inlet to the valve port, the liquid outlet chamber is a chamber from the valve port to the liquid outlet, and the liquid inlet chamber communicates with the liquid outlet chamber via the valve port.

4. comprising a valve body assembly, an electromagnetic assembly and a sight glass, The valve assembly includes a valve seat, and the valve seat contains a valve chamber. The electromagnetic assembly has a piston at one end that is movable within the chamber of the valve seat, and the piston causes the fluid in the valve chamber to maintain a flow state or a blocked state. The sight glass is provided on the valve seat and is integral with the valve seat. The sight glass viewing chamber is in communication with the valve chamber. The valve assembly further includes a valve cover provided on the valve seat, the valve chamber having a liquid inlet chamber and a liquid outlet chamber, and the valve seat is provided with a liquid inlet and a liquid outlet at both ends, communicating with the valve chamber, A solenoid valve with a sight glass, wherein a housing chamber is provided within the valve seat, a valve port is provided at the upper end of the housing chamber, the liquid inlet chamber is a chamber from the liquid inlet to the valve port, the liquid outlet chamber is a chamber from the valve port to the liquid outlet, and the liquid inlet chamber communicates with the liquid outlet chamber via the valve port.

5. The solenoid valve with a sight glass according to claim 3 or 4, wherein the sight glass includes a base and a lens, the base having a viewing chamber, the lens being located within the base, and the viewing chamber communicating with the liquid outlet chamber and / or the liquid inlet chamber.

6. A solenoid valve with a sight glass according to claim 5, wherein a mounting holder is provided inside the viewing chamber, and the mounting holder is used to set a test paper.

7. A solenoid valve with a sight glass according to claim 5, wherein a first stepped surface is provided inside the base, a second stepped surface is provided on the outer edge of the base, and the lens is mounted in the accommodating space between the first stepped surface and the second stepped surface.

8. The bottom of the aforementioned containment chamber has a through hole, which communicates with the liquid outlet. The solenoid valve with a sight glass according to claim 3 or 4, wherein the liquid outlet chamber has an L-shaped tubular space structure.

9. The solenoid valve with a sight glass according to claim 5, wherein an inlet is provided on the side of the sight glass closest to the liquid outlet, and an outlet is provided on the side of the sight glass away from the liquid outlet, and both the inlet and the outlet communicate with the viewing chamber, and the inlet communicates with the liquid outlet.

10. The solenoid valve with a sight glass according to claim 8, wherein the axes of the liquid inlet, the liquid outlet, the inlet, and the outlet are all on the same straight line.

11. The valve opening faces the electromagnetic assembly, and when the valve opening contacts the piston, communication between the liquid outlet chamber and the liquid inlet chamber is blocked, and the piston The solenoid valve with a sight glass according to claim 3 or 4, wherein when separated from the valve opening, the liquid outlet chamber communicates with the liquid inlet chamber.

12. The solenoid valve with sight glass according to claim 11, wherein the electromagnetic assembly includes a fixed core, a first spring, a movable core, a second spring, and a piston, arranged in order toward the valve port, the fixed core, the first spring, the movable core, and the second spring are provided within a sleeve, and the piston is connected to the movable core via the second spring.

13. The piston includes a transmission rod, an upper packing, a diaphragm, and a lower packing. The solenoid valve with a sight glass according to claim 12, wherein the upper packing and the lower packing are rigid sheets, the diaphragm is an elastic sheet, the upper packing, the diaphragm and the lower packing are sequentially provided coaxially at the end of the transmission rod closest to the valve opening, along the direction toward the valve opening, and the other end of the transmission rod away from the valve opening abuts against the second spring.

14. The diameter of the upper packing matches the outer diameter of the movable iron core. The diameter of the lower packing is smaller than the inner diameter of the valve opening. The solenoid valve with a sight glass according to claim 13, wherein the diameter of the diaphragm is larger than the outer diameter of the valve port.

15. The solenoid valve with a sight glass according to claim 13, wherein the edge of the diaphragm is stretched over the valve seat and the edge of the diaphragm is in close contact with the valve cover, thereby forming a sealed chamber between the diaphragm and the valve cover.

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