Adjustable normally-open electromagnetic expansion valve

Abstract

The adjustable normally-open electromagnetic expansion valve comprises a valve body, a transmission rod assembly, a valve element assembly and a steel ball seat assembly, the valve body is provided with a first flow channel, a second flow channel, a third flow channel and a valve cavity, the second flow channel and the third flow channel are located on the two sides of the valve cavity respectively, and the valve body is further provided with a transmission cavity and an adjusting cavity which are longitudinally arranged. The steel ball seat assembly is fixed in the adjusting cavity, the transmission rod assembly is installed in the transmission cavity, the valve element assembly comprises a valve element assembly and a coil assembly, and the valve element assembly comprises a valve element pipe, a sealing cushion block, a valve rod, a valve rod spring and a moving block; the movable block is located in the valve element pipe, the valve rod spring is connected outside the valve rod in a sleeved mode, a through hole is formed in the sealing cushion block, an adjusting block is arranged at one end of the valve element pipe, a multi-stage adjusting structure is arranged on the adjusting block, and an adjusting spring is arranged between the adjusting block and the movable block. The position of the moving block can be adjusted, so that the opening degree of the valve element assembly is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valves, and in particular to an adjustable normally open solenoid expansion valve. Background Technology

[0002] The expansion valve is an important component in a refrigeration system. It is usually installed between the condenser and the evaporator. The expansion valve throttles the high-temperature, high-pressure liquid refrigerant into low-temperature, low-pressure wet vapor, which enters the evaporator to absorb heat and achieve a cooling effect. The expansion valve can be controlled by the thermal head assembly to prevent insufficient utilization of the evaporator area or frosting.

[0003] The flow path of existing electromagnetic expansion valves can only be adjusted by the solenoid valve itself. In case of power failure or emergency, the opening and closing of the expansion valve cannot be controlled. To address these issues, a solution is proposed below. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable normally open electromagnetic expansion valve, which has the advantage of being able to adjust the flow rate of each flow channel within the electromagnetic expansion valve.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] An adjustable normally open electromagnetic expansion valve includes a valve body, a transmission rod assembly, a valve core assembly, and a steel ball seat assembly. The valve body is provided with a flow channel one, a flow channel two, a flow channel three, and a valve cavity. The flow channel two and the flow channel three are located on opposite sides of the valve cavity. The valve body is also provided with a longitudinally arranged transmission cavity and an adjustment cavity. The transmission cavity is located at the upper end of the valve cavity and communicates with the valve cavity. The adjustment cavity is located at the lower end of the valve cavity and communicates with the valve cavity. The flow channel three communicates with the adjustment cavity. The flow channel one communicates with the flow channel two. The valve cavity has two through holes, and the valve cavity communicates with the flow channel one through the two through holes.

[0007] The steel ball seat assembly is fixed inside the adjustment cavity, and the top of the steel ball seat assembly abuts against the lower end of the valve cavity to seal the valve cavity with the adjustment cavity;

[0008] The transmission rod assembly is installed into the transmission cavity, and the lower end of the transmission rod assembly passes through the valve cavity and abuts against the upper end of the steel ball seat assembly;

[0009] The valve core assembly is fixed on one side of the valve body. The valve core assembly includes a valve core component and a coil assembly. The coil assembly is connected to the flow channel two via threads. The valve core component is inserted into the coil assembly and is detachably connected to the coil assembly.

[0010] The valve core assembly includes a valve core tube, a sealing gasket, a valve stem, a valve stem spring, and a moving block. The moving block is located inside the valve core tube and is slidably connected to it. The valve stem spring is sleeved on the outside of the valve stem. One end of both the valve stem and the valve stem spring is inserted into the moving block and fixedly connected to it. The sealing gasket is fixed to one end of the valve core tube and blocks the connection between the flow channel and the valve cavity. The sealing gasket has a through hole. The end of the valve stem is located on one side of the through hole. One end of the valve core tube has an adjusting block with a multi-stage adjusting structure. The adjusting block is snapped into one end of the valve core tube through the multi-stage adjusting structure. An adjusting spring is provided between the adjusting block and the moving block.

[0011] Preferably, a valve tube sealing ring is fitted onto the valve core tube, and the outer edge of the valve tube sealing ring abuts against the inner wall of the flow channel two.

[0012] Preferably, the transmission rod assembly includes an air box head, a T-shaped bracket, and a transmission rod. The upper end of the T-shaped bracket is connected to the lower end face of the air box head, and the upper end of the transmission rod is inserted into the lower end of the T-shaped bracket. A sealing gasket is fitted onto the lower end of the air box head, and the outer edge of the sealing gasket abuts against the inner wall of the upper end of the transmission cavity. A transmission part sealing ring is provided on the transmission rod, and the outer edge of the transmission part sealing ring abuts against the inner wall of the lower end of the transmission cavity. The lower end of the transmission rod is located inside the valve cavity.

[0013] Preferably, the steel ball seat assembly is located inside the adjustment cavity. The steel ball seat assembly includes an adjustment screw, an adjustment spring, a steel ball seat, and a steel ball. The bottom of the adjustment cavity is provided with an internal thread. The adjustment screw is threadedly connected to the adjustment cavity. An adjustment sealing ring is fitted on the adjustment screw. The outer edge of the adjustment sealing ring abuts against the inner wall of the adjustment cavity. The adjustment spring is located at the top of the adjustment screw. The steel ball seat is located at the upper end of the adjustment spring. The steel ball is fixed at the upper end of the steel ball seat. The diameter of the steel ball is larger than the diameter of the valve cavity. The upper end of the steel ball abuts against the lower end of the valve cavity. The lower end of the transmission rod abuts against the upper end of the steel ball.

[0014] Preferably, the coil assembly contains a coil, and a washer block and a retaining ring are provided on one side of the coil assembly. One end of the valve core tube passes through the hole in the center of the washer block and is snapped onto one side of the washer block by the retaining ring.

[0015] The beneficial effects of this utility model are as follows: after power failure, if it is necessary to urgently close the opening of the valve core assembly, the adjusting block can be pushed to increase the length of the adjusting block extending into the valve core tube, so that the adjusting spring is compressed, and the moving block and valve stem are pushed towards the sealing block to seal the through hole on the sealing block. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0017] Figure 2 This is a structural breakdown diagram of an embodiment;

[0018] Figure 3 This is a schematic diagram illustrating the structure of the back of the valve body in an embodiment.

[0019] Figure 4 This is a cross-sectional view of the valve body in the embodiment;

[0020] Figure 5 This is a cross-sectional view of the valve core assembly in the embodiment.

[0021] Reference numerals: 1. Valve body; 11. Flow channel one; 12. Flow channel two; 13. Flow channel three; 14. Valve chamber; 15. Transmission chamber; 16. Adjustment chamber; 2. Coil assembly; 21. Coil; 22. Washer block; 23. Snap ring; 3. Valve core assembly; 31. Valve core tube; 32. Sealing gasket; 33. Valve stem; 34. Valve stem spring; 35. Moving block; 36. Adjusting block; 37. Multi-stage adjustment structure; 38. Adjusting spring; 39. Valve tube sealing ring; 4. Transmission rod assembly; 41. Air box head; 42. T-shaped bracket; 43. Transmission rod; 44. Sealing gasket; 45. Transmission part sealing ring; 5. Steel ball seat assembly; 51. Adjusting screw; 52. Adjustment part spring; 53. Steel ball seat; 54. Steel ball. Detailed Implementation

[0022] The following description is merely a preferred embodiment of this utility model, and the scope of protection is not limited to this embodiment. All technical solutions falling within the scope of this utility model's concept should be protected. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom" and "top," "inner" and "outer" refer to directions toward or away from the geometric center of a specific component.

[0023] like Figures 1 to 5 As shown, an adjustable normally open electromagnetic expansion valve includes a valve body 1, a transmission rod 43 assembly 4, a valve core assembly, and a steel ball seat assembly 5. The valve body 1 is provided with flow channel one 11, flow channel two 12, flow channel three 13, and a valve chamber 14. The valve chamber 14 is a longitudinally arranged cylinder. Flow channels one 11, two 12, and three 13 are all horizontally arranged, with flow channel two 12 and flow channel three 13 on the same plane, and flow channel one 11 perpendicular to the plane containing the other two flow channels. In this design, flow channel three 13 is the inlet, flow channel two 12 is the outlet, and flow channel one 11 is the mounting point for the valve core assembly.

[0024] The valve body 1 is also provided with a longitudinally arranged transmission chamber 15 and an adjustment chamber 16. The transmission chamber 15 is located at the upper end of the valve chamber 14 and communicates with the valve chamber 14. The transmission rod 43 assembly 4 is fixed in the transmission chamber 15. The flow channel 3 13 communicates with the adjustment chamber 16, the flow channel 2 12 communicates with the valve chamber 14, and the flow channel 11 communicates with the flow channel 2 12.

[0025] The adjusting chamber 16 is located at the lower end of the valve chamber 14 and communicates with the valve chamber 14. The steel ball seat assembly 5 is located inside the adjusting chamber 16. The steel ball seat assembly 5 includes an adjusting screw 51, an adjusting spring 52, a steel ball seat 53, and a steel ball 54 arranged sequentially from bottom to top. The adjusting screw 51 is threadedly connected to the bottom of the adjusting chamber 16, so that the entire steel ball seat assembly 5 can be fixed inside the adjusting chamber 16.

[0026] The diameter of the steel ball 54 is larger than the diameter of the valve cavity 14. The upper end of the steel ball 54 abuts against the lower end of the valve cavity 14. In the initial state, the steel ball 54 seals the lower end of the valve cavity 14, preventing the coolant from flowing through the valve body 1. If a downward force is applied to the steel ball 54, the adjusting spring 52 is compressed, causing the steel ball 54 to separate from the lower end of the valve cavity 14, allowing the coolant to enter the valve cavity 14 and flow out from the flow channel 12.

[0027] The transmission rod assembly 43 includes an air box head 41, a T-shaped bracket 42, and a transmission rod 43 arranged sequentially from top to bottom. When the temperature of the air box head 41 reaches a set value, its interior deforms to push the T-shaped bracket 42 and the transmission rod 43 downwards. In the initial position, the lowermost end of the transmission rod 43 rests against the upper surface of the steel ball 54. When the temperature changes, the air box head 41 pushes the T-shaped bracket 42 and the transmission rod 43 downwards, causing the transmission rod 43 to push the steel ball 54 downwards.

[0028] A sealing gasket 44 is fitted onto the lower end of the air box head 41. The outer edge of the sealing gasket 44 abuts against the inner wall of the upper end of the transmission cavity 15. A transmission part sealing ring 45 is provided on the transmission rod 43. The outer edge of the transmission part sealing ring 45 abuts against the inner wall of the lower end of the transmission cavity 15. The sealing gasket 44 can prevent fluid from contacting the air box head 41, and the transmission part sealing ring 45 can prevent liquid fluid from contacting gaseous fluid above.

[0029] The valve chamber 14 has two through holes, which are connected to the flow channel 11. Fluid enters the valve chamber 14 from the flow channel 3 13 through the regulating chamber 16 and flows into the flow channel 11 through the two through holes. When the through holes on the sealing gasket 32 ​​are not blocked by the valve stem 33, the fluid will enter the flow channel 2 12 through the through holes on the sealing gasket 32 ​​and flow out.

[0030] The valve core assembly is fixed at the flow channel 11 on one side of the valve body 1. The valve core assembly includes a valve core component 3 and a coil assembly 2. The coil assembly 2 contains a coil 21 and is connected to the flow channel 12 via threads. The valve core component 3 includes a valve core tube 31, a sealing gasket 32, a valve stem 33, a valve stem spring 34, and a moving block 35. The valve core tube 31 is inserted into the coil assembly 2, with one end located in the flow channel 11 and the other end located on the other side of the coil assembly 2. It is fixed by a gasket block 22 and a retaining ring 23, thus fixing the valve core tube 31 to the coil assembly 2.

[0031] The movable block 35 can drive the valve stem 33 to move along the length of the valve core tube 31 under the action of electromagnetic force. In this design, in the initial state, one end of the valve stem 33 maintains a certain distance from the sealing gasket 32, so that the through hole on the sealing gasket 32 ​​remains open. The normally open state is maintained by the valve stem spring 34 sleeved on the valve stem 33. When the movable block 35 pushes the valve stem 33 closer to the sealing gasket 32, it will compress the valve stem spring 34, so that after the electromagnetic force disappears, it can push the valve stem 33 away from the sealing gasket 32, so that the through hole on the sealing gasket 32 ​​remains open.

[0032] One end of the valve core tube 31 is provided with an adjusting block 36, and the adjusting block 36 is provided with a multi-stage adjusting structure 37. The multi-stage adjusting mechanism consists of a series of protruding retaining rings. An annular groove that mates with the retaining rings is provided on the inner wall of one end of the valve core tube 31. By applying force, the adjusting block 36 can be inserted into or pulled out of the valve core tube 31, changing the length of the adjusting block 36 inserted into the valve core tube 31. An adjusting spring 38 is provided between the adjusting block 36 and the moving block 35. When the length of the adjusting block 36 inserted into the valve core tube 31 increases, the adjusting spring 38 will be compressed, increasing the elastic force exerted by the adjusting spring 38 on the moving block 35. This pushes the moving block 35 and the valve stem 33 closer to the sealing gasket 32, causing the valve stem 33 to seal the through hole on the sealing gasket 32.

[0033] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjustable normally open electromagnetic expansion valve, comprising a valve body (1), a transmission rod (43) assembly (4), a valve core assembly, and a ball seat assembly (5), characterized in that, The valve body (1) is provided with flow channel one (11), flow channel two (12), flow channel three (13) and valve cavity (14). Flow channel two (12) and flow channel three (13) are located on both sides of valve cavity (14). The valve body (1) is also provided with a longitudinally arranged transmission cavity (15) and adjustment cavity (16). The transmission cavity (15) is located at the upper end of valve cavity (14) and communicates with valve cavity (14). The adjustment cavity (16) is located at the lower end of valve cavity (14) and communicates with valve cavity (14). Flow channel three (13) communicates with adjustment cavity (16). Flow channel one (11) communicates with flow channel two (12). Two through holes are opened on valve cavity (14). Valve cavity (14) communicates with flow channel one (11) through the two through holes. The ball seat assembly (5) is fixed inside the adjustment chamber (16), and the top of the ball seat assembly (5) abuts against the lower end of the valve chamber (14) to seal the valve chamber (14) and the adjustment chamber (16). The transmission rod (43) assembly (4) is installed in the transmission cavity (15), and the lower end of the transmission rod (43) assembly (4) passes through the valve cavity (14) and abuts against the upper end of the steel ball seat assembly (5); The valve core assembly is fixed on one side of the valve body (1). The valve core assembly includes a valve core component (3) and a coil assembly (2). The coil assembly (2) is connected to the flow channel two (12) by a thread. The valve core component (3) is inserted into the coil assembly (2) and is detachably connected to the coil assembly (2). The valve core assembly (3) includes a valve core tube (31), a sealing gasket (32), a valve stem (33), a valve stem spring (34), and a moving block (35); the moving block (35) is located inside the valve core tube (31) and is slidably connected to the valve core tube (31); the valve stem spring (34) is sleeved on the outside of the valve stem (33); one end of both the valve stem (33) and the valve stem spring (34) is inserted into the moving block (35) and is fixedly connected to the moving block (35); the sealing gasket (32) is fixed to one end of the valve core tube (31), and... The sealing gasket (32) blocks the connection between the flow channel (12) and the valve chamber (14). The sealing gasket (32) has a through hole. The end of the valve stem (33) is located on one side of the through hole. One end of the valve core tube (31) is provided with an adjusting block (36). The adjusting block (36) is provided with a multi-stage adjusting structure (37). The adjusting block (36) is connected to one end of the valve core tube (31) through the multi-stage adjusting structure (37). An adjusting spring (38) is provided between the adjusting block (36) and the moving block (35).

2. The adjustable normally open electromagnetic expansion valve according to claim 1, characterized in that, A valve tube sealing ring (39) is fitted onto the valve core tube (31), and the outer edge of the valve tube sealing ring (39) abuts against the inner wall of the flow channel (12).

3. The adjustable normally open electromagnetic expansion valve according to claim 1, characterized in that, The transmission rod (43) assembly (4) includes an air box head (41), a T-shaped bracket (42) and a transmission rod (43). The upper end of the T-shaped bracket (42) is connected to the lower end face of the air box head (41). The upper end of the transmission rod (43) is inserted into the lower end of the T-shaped bracket (42). A sealing gasket (44) is fitted onto the lower end of the air box head (41). The outer edge of the sealing gasket (44) abuts against the inner wall of the upper end of the transmission cavity (15). A transmission part sealing ring (45) is provided on the transmission rod (43). The outer edge of the transmission part sealing ring (45) abuts against the inner wall of the lower end of the transmission cavity (15). The lower end of the transmission rod (43) is located in the valve cavity (14).

4. An adjustable normally open electromagnetic expansion valve according to claim 3, characterized in that, The ball seat assembly (5) is located inside the adjustment cavity (16). The ball seat assembly (5) includes an adjustment screw (51), an adjustment spring (52), a ball seat (53), and a ball (54). The bottom of the adjustment cavity (16) is provided with an internal thread. The adjustment screw (51) is threadedly connected to the adjustment cavity (16). An adjustment sealing ring is fitted on the adjustment screw (51). The outer edge of the adjustment sealing ring abuts against the inner wall of the adjustment cavity (16). The adjustment spring (52) is located at the top of the adjustment screw (51). The ball seat (53) is located at the upper end of the adjustment spring (52). The ball (54) is fixed at the upper end of the ball seat (53). The diameter of the ball (54) is larger than the diameter of the valve cavity (14). The upper end of the ball (54) abuts against the lower end of the valve cavity (14). The lower end of the transmission rod (43) abuts against the upper end of the ball (54).

5. An adjustable normally open electromagnetic expansion valve according to claim 1, characterized in that, The coil assembly (2) contains a coil (21). A washer block (22) and a snap ring (23) are provided on one side of the coil assembly (2). One end of the valve core tube (31) passes through the hole in the center of the washer block (22) and is snapped onto one side of the washer block (22) by the snap ring (23).

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