Electromagnetic valve and air conditioning system
By incorporating a temperature conductor and temperature control mechanism into the solenoid valve, the problem of impeded piston movement caused by the spring reaction force when the solenoid valve is closed is solved, resulting in better valve closing effect and sealing performance, and expanding the application range of the solenoid valve.
Patent Information
- Application Number
- CN202520006950.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-02
AI Technical Summary
When the existing solenoid valve is closed, the reaction force of the spring causes the piston to move poorly, affecting the valve closing effect and failing to achieve a good sealing effect, thus limiting its application range.
By introducing a temperature-conducting element into the solenoid valve and fixing it to the end of the piston and valve needle, and making contact with the temperature control mechanism, the temperature control mechanism drives the first spring to move in the axial direction, reducing its lifting force on the piston and achieving a better valve closing effect.
This technology enables solenoid valves to achieve the shut-off effect of high-cost motor valves at a low cost, thereby improving the application range and practicality of solenoid valves.
Smart Images
Figure CN223690359U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to solenoid valve technical field especially relates to a solenoid valve and air conditioning system. BACKGROUND
[0002] The working principle of solenoid valve is to use the electromagnetic force generated by the electromagnetic coil to push the valve core to act, realize the on-off or reversing of fluid, can be applied in many fields, including but not limited to air conditioning system. Solenoid valve mainly includes valve body, piston, spring and valve needle, and the piston moves by spring and valve needle control, to make solenoid valve open and close. But the existing solenoid valve is limited by structure, when the valve needle pushes the piston to move to a certain direction to realize the valve, the spring will generate the opposite force, make the piston move to the opposite direction, lead to solenoid valve unable to realize better valve effect, influence solenoid valve use range. SUMMARY
[0003] The utility model provides a solenoid valve and air conditioning system to solve the problem that the existing solenoid valve cannot realize better valve effect.
[0004] A solenoid valve, including shell, valve body, piston, first spring, valve needle, temperature conducting piece and temperature control mechanism;
[0005] The valve body is installed in the shell, and the internal space of the shell is divided into a first space and a second space;
[0006] The piston is movably installed in the valve body along the axial direction of the solenoid valve;
[0007] The first spring is arranged in the second space and used to push the piston to move in a first direction;
[0008] The valve needle is movably arranged in the first space and used to push the piston to move in a second direction;
[0009] The temperature conducting piece and the temperature control mechanism are both arranged in the second space;
[0010] The temperature conducting piece is fixedly connected with the end of the valve needle and moves to the temperature control mechanism under the driving of the valve needle,
[0011] The temperature control mechanism is connected with the first spring, and when the temperature conducting piece contacts with the temperature control mechanism, the temperature control mechanism drives the first spring to move in the second direction.
[0012] Preferably, the temperature control mechanism comprises a temperature sensing structure;
[0013] The temperature sensing structure is provided with a temperature sensing cavity, and the temperature sensing cavity is provided with a temperature sensitive gas;
[0014] The temperature sensing structure is connected with the first spring, and when the temperature conducting element is in contact with the temperature sensing structure, the temperature sensitive gas causes the temperature sensing cavity to deform, thereby driving the first spring to move in a second direction.
[0015] Preferably, the temperature sensing structure comprises a temperature conducting wall arranged along an axial direction of the electromagnetic valve and a deformable side wall arranged along a radial direction of the electromagnetic valve.
[0016] The temperature conducting wall is arranged to be in contact with the temperature conducting element.
[0017] The deformable side wall is connected with the first spring.
[0018] Preferably, the temperature control mechanism further comprises a pressure bearing disc, which comprises a disc body and a protrusion extending from a first side of the disc body along an axial direction of the electromagnetic valve.
[0019] A second side of the disc body is connected with the first spring, and the protrusion is connected with the deformable side wall.
[0020] Preferably, the temperature conducting element comprises a conducting body, a connecting rod extending from a first side of the conducting body along an axial direction, and a connecting wall extending from a second side of the conducting body along an axial direction.
[0021] Preferably, the electromagnetic valve further comprises an exhaust pipe arranged in the second space; the conducting body is movably arranged on the exhaust pipe; the connecting rod is fixedly connected with the end of the valve needle; an inner wall of the connecting wall is arranged opposite to the exhaust pipe; and an outer wall of the connecting wall is arranged to be in contact with the temperature sensing structure.
[0022] Preferably, the exhaust pipe is arranged in the second space, and a moving space arranged along a first direction is arranged on the exhaust pipe; the temperature conducting element is arranged in the moving space; and the first spring is sleeved on the exhaust pipe and the temperature conducting element.
[0023] The temperature sensing structure is arranged around the exhaust pipe, and an activity gap for the temperature conducting element is arranged between the temperature sensing structure and the exhaust pipe.
[0024] Preferably, an air inlet is arranged on the housing and is in communication with the second space; the electromagnetic valve further comprises a sleeve and a driving assembly; the sleeve is arranged in the valve body, and a first end of the sleeve extends into the first space.
[0025] A pressure cavity is formed between the piston and a second end of the sleeve; and an air passage is arranged on the piston and is in communication with the pressure cavity and the second space.
[0026] The valve needle is arranged in the sleeve.
[0027] The driving assembly is arranged in the first space and is connected with the valve needle for driving the valve needle to move in the second direction.
[0028] Preferably, the driving assembly comprises a coil and a second spring.
[0029] The coil is wound on the sleeve.
[0030] The sleeve is provided with a movable chamber, and the second spring is arranged in the movable chamber.
[0031] The second spring is sleeved on the valve needle and connected with the valve needle.
[0032] Preferably, the valve needle comprises a valve needle body, a tip portion extending from one end of the valve needle body in the axial direction of the valve needle, and a stopper extending from the valve needle body in the radial direction of the valve needle.
[0033] The valve needle body is arranged in the sleeve and the second spring, the tip portion is connected with the piston, and the stopper is connected with the second spring.
[0034] An air conditioning system comprising the electromagnetic valve.
[0035] In the electromagnetic valve, the temperature conducting member is arranged in the second space and fixedly connected with the end of the valve needle through the piston, so that the temperature conducting member can move with the valve needle and move downward along the axial direction of the valve body under the action of the valve needle and can be in contact with the temperature control mechanism. The temperature control mechanism is arranged in the second space and connected with the first spring, and specifically, the first spring can be directly placed on the temperature control mechanism or the first spring and the temperature control mechanism can be fixedly connected together. When the temperature conducting member is driven by the valve needle to move downward and the temperature conducting member is in contact with the temperature control mechanism, the temperature control mechanism can drive the first spring to move downward along the axial direction of the valve body, so that the force of the first spring for lifting the piston upward is reduced, the movement of the piston driven by the valve needle is facilitated, and better valve closing effect is ensured. The electromagnetic valve of the example has low cost and can achieve the cutoff effect of a high-cost electromagnetic valve, and the use range and practicality of the electromagnetic valve are improved. BRIEF DESCRIPTION OF DRAWINGS
[0036] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the description of the embodiments of the utility model, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying the creative labor, other drawings can also be obtained according to these drawings.
[0037] Figure 1is the sectional view of the first state of the electromagnetic valve in an embodiment of the utility model;
[0038] Figure 2 is the sectional view of the second state of the electromagnetic valve in an embodiment of the utility model.
[0039] Wherein, 1, shell;2, valve body;3, piston;4, first spring;5, valve needle;51, valve needle main body;52, tip part;53, stopper;6, temperature conducting part;61, conducting main body;62, connecting rod;63, connecting wall;7, temperature control mechanism;71, temperature sensing structure;711, temperature sensing cavity;712, temperature conducting wall;713, deformable side wall;72, pressure receiving disc;721, disc body;722, protrusion;8, exhaust pipe;81, moving space;9, movable gap;10, sleeve;101, movable chamber;11, driving assembly;111, coil;112, second spring;12, air inlet;13, air inlet cavity;14, pressure cavity;15, air passage;16, exhaust cavity. DETAILED DESCRIPTION
[0040] In order to make the technical problem, technical scheme and beneficial effect solved by the utility model clearer and more apparent, the utility model is further described in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.
[0041] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0042] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected;It can be mechanical connection, or it can be electrical connection;It can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0043] The utility model embodiment provides a kind of electromagnetic valve, refer toFigure 1 and Figure 2 The electromagnetic valve comprises a housing 1, a valve body 2, a piston 3, a first spring 4, a valve needle 5, a temperature conducting element 6 and a temperature control mechanism 7; the valve body 2 is installed in the housing 1, and divides the internal space of the housing 1 into a first space and a second space; the piston 3 is movably installed in the valve body 2 along the axial direction of the electromagnetic valve; the first spring 4 is arranged in the second space and used to push the piston 3 to move along a first direction; the valve needle 5 is movably arranged in the first space and used to push the piston 3 to move along a second direction; the temperature conducting element 6 and the temperature control mechanism 7 are both arranged in the second space; the temperature conducting element 6 is fixedly connected with the end of the valve needle 5 and moves to the temperature control mechanism 7 under the driving of the valve needle 5; the temperature control mechanism 7 is connected with the first spring 4, and when the temperature conducting element 6 contacts with the temperature control mechanism 7, the temperature control mechanism 7 drives the first spring 4 to move along the second direction.
[0044] The first direction and the second direction are two directions along the axial direction of the electromagnetic valve, and the two directions are opposite to each other, for example, the first direction is a direction upward along the axial direction of the valve body 2, and the second direction is a direction downward along the axial direction of the valve body 2.
[0045] As an example, the electromagnetic valve includes a housing 1, a valve body 2, a piston 3, a first spring 4, a valve needle 5, a temperature conducting element 6 and a temperature control mechanism 7; when installed, the housing 1 is the installation reference, the valve body 2 is installed in the housing 1, and the internal space of the housing 1 is divided into a first space and a second space; the piston 3 is movably installed in the valve body 2 along the axial direction of the electromagnetic valve, and can be moved upward or downward along the axial direction of the valve body 2 to open or close the electromagnetic valve. The first spring 4 is arranged in the second space, and the elastic force of the first spring 4 can push the piston 3 to move upward along the axial direction of the valve body 2 to open the electromagnetic valve; the valve needle 5 is movably arranged in the first space, and the valve needle 5 is controlled to move downward along the axial direction of the valve body 2 by external force to push the piston 3 to move downward along the axial direction of the valve body 2 to close the electromagnetic valve. The temperature conducting element 6 is arranged in the second space and fixedly connected to the end of the valve needle 5 through the piston 3, so that the temperature conducting element 6 can move with the valve needle 5 and move downward along the axial direction of the valve body 2 under the action of the valve needle 5 and can be in contact with the temperature control mechanism 7. The temperature control mechanism 7 is arranged in the second space and connected with the first spring 4, and specifically, the first spring 4 can be directly placed on the temperature control mechanism 7 or the first spring 4 and the temperature control mechanism 7 can be fixedly connected together; when the temperature conducting element 6 is driven by the valve needle 5 to move downward and the temperature conducting element 6 is in contact with the temperature control mechanism 7, the temperature control mechanism 7 can drive the first spring 4 to move downward along the axial direction of the valve body 2, thereby reducing the force of the first spring 4 to push the piston 3 upward, facilitating the piston 3 to be pushed by the valve needle 5 to move, and ensuring that a better valve closing effect is achieved; the electromagnetic valve of the example has a low cost, can achieve a low-cost electromagnetic valve, and can achieve the cutoff effect of a high-cost electromagnetic valve, thereby improving the use range and practicality of the electromagnetic valve.
[0046] In an embodiment, with reference to Figure 1 and Figure 2 , the temperature control mechanism 7 includes a temperature sensing structure 71; the temperature sensing structure 71 is provided with a temperature sensing cavity 711, and the temperature sensing cavity 711 is provided with a temperature-sensitive gas; the temperature sensing structure 71 is connected with the first spring 4; when the temperature conducting element 6 is in contact with the temperature sensing structure 71, the temperature-sensitive gas causes the temperature sensing cavity 711 to deform and drive the first spring 4 to move along the second direction.
[0047] As an example, the temperature control mechanism 7 comprises a temperature sensing structure 71; the temperature sensing structure 71 is provided with a temperature sensing cavity 711, and the temperature sensing cavity 711 is provided with a temperature sensitive gas, which comprises but is not limited to gaseous refrigerant R134a, and the volume of the temperature sensing cavity 711 can change according to thermal expansion and contraction of the temperature sensitive gas, so that the temperature sensing structure 71 deforms. The temperature sensing structure 71 is connected with the first spring 4; in this way, since the temperature conducting element 6 is in contact with the refrigerant in the second space, the temperature conducting element 6 can keep the same temperature as the refrigerant; under the action of the valve needle 5, the temperature conducting element 6 moves downward along the axial direction of the valve body 2 and can be in contact with the side wall of the temperature sensing structure 71; since the temperature conducting element 6 is soaked in the air conditioner refrigerant at a lower temperature at this time, the side wall of the temperature sensing structure 71 is in contact with the temperature conducting element 6 at a lower temperature, a thermal bridge is formed, the heat of the temperature sensitive gas in the temperature sensing cavity 711 is transferred to the refrigerant at a lower temperature through the temperature conducting element 6, and rapid thermal expansion and contraction occurs, the volume is reduced, and the first spring 4 can be driven to move downward along the axial direction of the valve body 2 as the volume of the temperature sensing cavity 711 is reduced, so that the force of the first spring 4 pushing the piston 3 upward is reduced, the valve needle 5 is facilitated to push the piston 3 to move, and better valve closing effect is ensured.
[0048] In an embodiment, referring to Figure 1 and Figure 2 , the temperature sensing structure 71 comprises a temperature conducting wall 712 arranged along the axial direction of the electromagnetic valve and a deformable side wall 713 arranged along the radial direction of the electromagnetic valve; the temperature conducting wall 712 is used to contact the temperature conducting element 6; and the deformable side wall 713 is connected with the first spring 4.
[0049] As an example, the temperature sensing structure 71 comprises a temperature conducting wall 712 arranged along the axial direction of the electromagnetic valve and a deformable side wall 713 arranged along the radial direction of the electromagnetic valve; the temperature conducting wall 712 is used to contact the temperature conducting element 6; and the deformable side wall 713 is connected with the first spring 4; in this way, the temperature conducting element 6 moves downward along the axial direction of the valve body 2 under the action of the valve needle 5 and can be in contact with the temperature conducting wall 712; since the temperature conducting element 6 is soaked in the air conditioner refrigerant at a lower temperature at this time, the temperature conducting wall 712 is in contact with the temperature conducting element 6 at a lower temperature, a thermal bridge is formed, the heat of the temperature sensitive gas in the temperature sensing cavity 711 is transferred to the refrigerant at a lower temperature through the temperature conducting wall 712 and the temperature conducting element 6, and rapid thermal expansion and contraction occurs, the volume is reduced, and the first spring 4 can be driven to move downward along the axial direction of the valve body 2 as the volume of the temperature sensing cavity 711 is reduced; since the materials of the side walls of the temperature sensing structure 71 are different, the thermal expansion and contraction rates are different, the deformable side wall 713 can produce a larger deformation compared with other side walls, the first spring 4 can be driven to move downward along the axial direction of the valve body 2, so that the force of the first spring 4 pushing the piston 3 upward is reduced, the valve needle 5 is facilitated to push the piston 3 to move, and better valve closing effect is ensured. The deformable side wall 713 can be an elastic diaphragm.
[0050] In an embodiment, referring to Figure 1 and Figure 2 , the temperature control mechanism 7 further comprises a pressure receiving disc 72, the pressure receiving disc 72 comprises a disc body 721 and a protrusion 722 extending from a first side of the disc body 721 in the axial direction of the electromagnetic valve; a second side of the disc body 721 is in contact with the first spring 4, and the protrusion 722 is in contact with the deformable side wall 713.
[0051] As an example, the temperature control mechanism 7 further comprises a pressure receiving disc 72; the pressure receiving disc 72 comprises a disc body 721 and a protrusion 722; the protrusion 722 is a component extending from a first side of the disc body 721 in the axial direction of the electromagnetic valve; when installed, a second side of the disc body 721 is in contact with the first spring 4, and the protrusion 722 is in contact with the temperature sensing structure 71; in this way, when the deformable side wall 713 deforms, the protrusion 722 moves downward along the axial direction of the valve body 2 with the deformation of the deformable side wall 713 of the temperature sensing structure 71, and the disc body 721 also moves, thereby adjusting the position of the first spring 4, so that the force of the first spring 4 pushing the piston 3 upward can be reduced, facilitating the movement of the valve needle 5 pushing the piston 3, and ensuring better valve closing effect.
[0052] In an embodiment, referring to Figure 1 and Figure 2 , the temperature conducting member 6 comprises a conducting body 61, a connecting rod 62 extending from a first side of the conducting body 61 in the axial direction, and a connecting wall 63 extending from a second side of the conducting body 61 in the axial direction.
[0053] As an example, the temperature conducting member 6 comprises a conducting body 61, a connecting rod 62 and a connecting wall 63; the conducting body 61 is movably installed in the second space, the connecting rod 62 is a component extending from a first side of the conducting body 61 in the axial direction and is fixedly connected with the end of the valve needle 5; the connecting wall 63 is a component extending from a second side of the conducting body 61 in the axial direction and is used to contact the temperature sensing structure 71; in this way, the temperature conducting member 6 can be connected with the valve needle 5, and the temperature conducting member 6 can move with the movement of the valve needle 5 and not contact or contact the side wall of the temperature sensing structure 71, so that the temperature sensing structure 71 is reset or deformed, thereby adjusting the position of the first spring 4, so that the force of the first spring 4 pushing the piston 3 upward can be reduced, facilitating the movement of the valve needle 5 pushing the piston 3, and ensuring better valve closing effect.
[0054] In an embodiment, referring to Figure 1 and Figure 2 , the electromagnetic valve further comprises an exhaust pipe 8, the exhaust pipe 8 is arranged in the second space; the conducting body 61 is movably installed on the exhaust pipe 8, the connecting rod 62 is fixedly connected with the end of the valve needle 5, and the inner wall of the connecting wall 63 is arranged opposite to the exhaust pipe 8, and the outer wall of the connecting wall 63 is used to contact the temperature sensing structure 71.
[0055] As an example, the electromagnetic valve further comprises an exhaust pipe 8, when installed, the exhaust pipe 8 is arranged in the second space, the first spring 4 is sleeved outside the exhaust pipe 8, so that the piston 3 can be moved upward along the axial direction of the valve body 2 by the elastic force of the first spring 4, the piston 3 is away from the exhaust pipe 8, the valve is opened, and the electromagnetic valve is opened. The conducting body 61 is movably arranged on the exhaust pipe 8, the connecting rod 62 is a component extending from the first side of the conducting body 61 along the axial direction and is fixedly connected with the end of the valve needle 5; the connecting wall 63 is a component extending from the second side of the conducting body 61 along the axial direction, the inner wall of the connecting wall 63 is arranged opposite to the exhaust pipe 8, and the outer wall of the connecting wall 63 is used for contacting the temperature sensing structure 71. In this way, the temperature conducting element 6 and the valve needle 5 can be connected together, the temperature conducting element 6 can move along with the valve needle 5, and the side wall of the temperature sensing structure 71 is not in contact or in contact, so that the temperature sensing structure 71 is reset or deformed, the position of the first spring 4 is adjusted, the force of the first spring 4 upwardly pushing the piston 3 is reduced, the valve needle 5 is facilitated to push the piston 3 to move, and better valve closing effect is ensured.
[0056] In an embodiment, referring to Figure 1 and Figure 2 , the exhaust pipe 8 is provided with a moving space 81 arranged along the first direction; the temperature conducting element 6 is arranged in the moving space 81; the first spring 4 is sleeved outside the exhaust pipe 8 and the temperature conducting element 6; and the temperature sensing structure 71 is arranged around the outside of the exhaust pipe 8, and there is an activity gap 9 between the temperature sensing structure 71 and the exhaust pipe 8 for the temperature conducting element 6 to move.
[0057] As an example, the exhaust pipe 8 is provided with a moving space 81 arranged along the first direction (i.e. the axial direction of the valve body 2); the temperature conducting element 6 is arranged in the moving space 81, the first spring 4 is sleeved outside the exhaust pipe 8 and the temperature conducting element 6, and the temperature conducting element 6 can move upward or downward along the first direction. The temperature sensing structure 71 is arranged around the outside of the exhaust pipe 8, and there is an activity gap 9 between the temperature sensing structure 71 and the exhaust pipe 8 for the temperature conducting element 6 to move. In this way, under the action of the valve needle 5, the temperature conducting element 6 can move upward or downward along the first direction in the exhaust pipe 8, away from or into the activity gap 9, and the side wall of the temperature sensing structure 71 is not in contact or in contact, so that the temperature sensing structure 71 is reset or deformed, the position of the first spring 4 is adjusted, the force of the first spring 4 upwardly pushing the piston 3 is reduced, the valve needle 5 is facilitated to push the piston 3 to move, and better valve closing effect is ensured.
[0058] In an embodiment, referring to Figure 1 and Figure 2The temperature conducting member 6 comprises a conducting body 61, a connecting rod 62 extending from a first side of the conducting body 61 in an axial direction, and a connecting wall 63 extending from a second side of the conducting body 61 in an axial direction; the connecting rod 62 is fixedly connected with the end of the valve needle 5, and the inner wall of the connecting wall 63 is arranged opposite to the exhaust pipe 8, and the outer wall of the connecting wall 63 is used to contact the temperature sensing structure 71.
[0059] As an example, the temperature conducting member 6 comprises the conducting body 61, the connecting rod 62 and the connecting wall 63; the conducting body 61 is movably installed on the exhaust pipe 8, the connecting rod 62 is a component extending from a first side of the conducting body 61 in an axial direction, and is fixedly connected with the end of the valve needle 5; the connecting wall 63 is a component extending from a second side of the conducting body 61 in an axial direction, and the inner wall of the connecting wall 63 is arranged opposite to the exhaust pipe 8, and the outer wall of the connecting wall 63 is used to contact the temperature sensing structure 71; in this way, the temperature conducting member 6 and the valve needle 5 can be connected together, the temperature conducting member 6 can move with the valve needle 5, and the side wall of the temperature sensing structure 71 is not contacted or contacted, so that the temperature sensing structure 71 is reset or deformed, to adjust the position of the first spring 4, so that the force of the first spring 4 upwardly pushing the piston 3 can be reduced, to facilitate the piston 3 to be pushed by the valve needle 5 to move, and to ensure that a better valve closing effect is achieved.
[0060] In an embodiment, referring to Figure 1 and Figure 2 , the housing 1 is provided with an air inlet 12 in communication with the second space; the electromagnetic valve further comprises a sleeve 10 and a driving assembly 11; the sleeve 10 is arranged in the valve body 2, and a first end of the sleeve 10 extends into the first space; the piston 3 and a second end of the sleeve 10 form a pressure cavity 14; the piston 3 is provided with an air channel 15 in communication with the pressure cavity 14 and the second space; the valve needle 5 is arranged in the sleeve 10; the driving assembly 11 is arranged in the first space and is connected with the valve needle 5, and is used to drive the valve needle 5 to move in the second direction.
[0061] As an example, the electromagnetic valve further comprises a sleeve 10 and a driving assembly 11; when installed, an air inlet 12 is provided on the housing 1 and communicates with the second space, so that the second space forms an air inlet cavity 13; the sleeve 10 is arranged in the valve body 2, and a first end of the sleeve 10 extends into the first space; a pressure cavity 14 is formed between the piston 3 and a second end of the sleeve 10; the piston 3 is provided with an air passage 15 that communicates the pressure cavity 14 and the air inlet cavity 13; an exhaust cavity 16 that communicates with the second space, i.e., the air inlet cavity 13, is arranged in the exhaust pipe 8; the valve needle 5 is arranged in the sleeve 10; the driving assembly 11 is arranged in the first space and is in contact with the valve needle 5, and is used to drive the valve needle 5 to move in the second direction; in this way, in a normal state, the driving assembly 11 drives the valve needle 5 to move upward in the axial direction of the valve body 2, and the valve needle 5 is separated from the piston 3; at this time, the pressure cavity 14 communicates with the exhaust cavity 16 through the piston port on the piston 3, and the pressure in the pressure cavity 14 is balanced with the pressure in the exhaust cavity 16; since the pressure cavity 14 and the air inlet cavity 13 are always connected through the air passage 15, the pressures in the two cavities are always the same; therefore, in the current state, the pressures in the pressure cavity 14, the air inlet cavity 13 and the exhaust cavity 16 are balanced, and the piston 3 is only subjected to the upward thrust of the first spring 4; the piston 3 moves upward, so that the air inlet cavity 13 communicates with the exhaust cavity 16, and the electromagnetic valve is opened; when it is necessary to close the valve, the driving assembly 11 drives the valve needle 5 to move downward in the axial direction of the valve body 2, the valve needle 5 contacts the piston 3, and the valve needle 5 blocks the piston port on the piston 3; at this time, the communication between the pressure cavity 14 and the exhaust cavity 16 is cut off; since the pressure cavity 14 and the air inlet cavity 13 are always connected through the air passage 15, the pressures in the two cavities are always the same, and the pressure in the air inlet cavity 13 is higher than the pressure in the exhaust cavity 16, so that a pressure difference appears between the upper and lower parts of the piston 3; when the pressure difference is greater than the pressure of the first spring 4, the piston 3 is pressed against the pipe opening of the exhaust pipe 8, the air inlet cavity 13 is cut off from the exhaust cavity 16, and the effect of cutting off the flow channel is achieved. The temperature conducting member 6 can move upward or downward in the exhaust pipe 8 in the first direction under the action of the valve needle 5, and can move away from or enter the active gap 9, so as to be in contact with or not in contact with the side wall of the temperature sensing structure 71, so as to reset or deform the temperature sensing structure 71, so as to adjust the position of the first spring 4, thereby reducing the upward thrust of the first spring 4 on the piston 3, facilitating the movement of the piston 3 pushed by the valve needle 5, and ensuring that a better valve closing effect is achieved, so that the connection between the piston 3 and the exhaust pipe 8 is more tight, and a better internal sealing effect of the valve is achieved
[0062] In an embodiment, referring to Figure 1 and Figure 2 , the driving assembly 11 comprises a coil 111 and a second spring 112; the coil 111 is wound around the sleeve 10; the sleeve 10 is provided with a movable chamber 101, and the second spring 112 is arranged in the movable chamber 101; the second spring 112 is sleeved outside the valve needle 5 and is in contact with the valve needle 5.
[0063] As an example, the driving assembly 11 comprises a coil 111 and a second spring 112; the coil 111 is wound on the sleeve 10 during installation; the sleeve 10 is provided with a movable chamber 101 in the first end; the second spring 112 is arranged in the movable chamber 101; the second spring 112 is sleeved on the valve needle 5 and is in contact with the valve needle 5; in this way, when the electromagnetic valve is opened, the coil 111 is powered off, and the elastic force of the second spring 112 can be used to drive the valve needle 5 to move upward along the axial direction of the valve body 2, so that the valve needle 5 is separated from the piston 3; when the electromagnetic valve is closed, the coil 111 is powered on, and a driving force can be generated to drive the valve needle 5 to move downward along the axial direction of the valve body 2, so that the valve needle 5 blocks the piston port on the piston 3.
[0064] In an embodiment, referring to Figure 1 and Figure 2 , the valve needle 5 comprises a valve needle body 51, a tip 52 extending from one end of the valve needle body 51 along the axial direction of the valve needle 5, and a stopper 53 extending from the valve needle body 51 along the radial direction of the valve needle 5; the valve needle body 51 is arranged in the sleeve 10 and the second spring 112, the tip 52 is used to contact the piston 3, and the stopper 53 is used to contact the second spring 112.
[0065] As an example, the valve needle 5 comprises a valve needle body 51, a tip 52 and a stopper 53; the valve needle body 51 is arranged in the sleeve 10 and the second spring 112, the tip 52 is a component extending from one end of the valve needle body 51 along the axial direction of the valve needle 5 (i.e., the axial direction of the valve body 2) and is used to contact the piston 3; the stopper 53 is a component extending from the valve needle body 51 along the radial direction of the valve needle 5 and is used to contact the second spring 112; in this way, the elastic force of the second spring 112 can be used to move the stopper 53 in the movable chamber 101 of the sleeve 10, so as to drive the valve needle 5 to move upward along the axial direction of the valve body 2, and the valve needle 5 is separated from the piston 3; at this time, the pressure cavity 14 is in communication with the exhaust cavity 16 through the piston port on the piston 3, the pressure in the pressure cavity 14 is balanced with the pressure in the exhaust cavity 16, since the pressure cavity 14 and the intake cavity 13 are always connected through the gas passage 15, the pressures in the two cavities are always the same, therefore, the pressures in the pressure cavity 14, the intake cavity 13 and the exhaust cavity 16 are balanced in the current state, the piston 3 only receives the upward thrust of the first spring 4, the piston 3 moves upward, the intake cavity 13 is in communication with the exhaust cavity 16, and the electromagnetic valve is opened.
[0066] The utility model embodiment provides a kind of air conditioning system, including electromagnetic valve.
[0067] As an example, the air conditioning system includes a solenoid valve, which can be applied in many fields, such as vehicles. The solenoid valve includes a housing 1, a valve body 2, a piston 3, a first spring 4, a valve needle 5, a temperature conducting element 6 and a temperature control mechanism 7; when installed, the housing 1 is the installation reference, the valve body 2 is installed in the housing 1, and the internal space of the housing 1 is divided into a first space and a second space; the piston 3 is movably installed in the valve body 2 along the axial direction of the valve body 2, and can be moved upward or downward along the axial direction of the valve body 2 to open or close the solenoid valve. The first spring 4 is arranged in the second space, and the elastic force of the first spring 4 can push the piston 3 to move upward along the axial direction of the valve body 2 to open the solenoid valve; the valve needle 5 is movably arranged in the first space, and the valve needle 5 is controlled to move downward along the axial direction of the valve body 2 by external force to push the piston 3 to move downward along the axial direction of the valve body 2 to close the solenoid valve. The temperature conducting element 6 is arranged in the second space and fixedly connected to the end of the valve needle 5 through the piston 3, so that the temperature conducting element 6 can move with the valve needle 5 and move downward along the axial direction of the valve body 2 under the action of the valve needle 5 and can be in contact with the temperature control mechanism 7. The temperature control mechanism 7 is arranged in the second space and connected with the first spring 4, and specifically, the first spring 4 can be directly placed on the temperature control mechanism 7 or the first spring 4 and the temperature control mechanism 7 can be fixedly connected together; when the temperature conducting element 6 is driven by the valve needle 5 to move downward and the temperature conducting element 6 is in contact with the temperature control mechanism 7, the temperature control mechanism 7 can drive the first spring 4 to move downward along the axial direction of the valve body 2, thereby reducing the force of the first spring 4 to push the piston 3 upward, facilitating the movement of the piston 3 driven by the valve needle 5, and ensuring better valve closing effect; the solenoid valve of the example has low cost, can achieve the cutoff effect of high-cost solenoid valves, and improves the use range and practicality of the solenoid valve.
[0068] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.
Claims
1. An electromagnetic valve characterized by comprising: The electromagnetic valve comprises a shell, a valve body, a piston, a first spring, a valve needle, a temperature conducting element and a temperature control mechanism. The valve body is installed in the shell, and divides the internal space of the shell into a first space and a second space. The piston is movably installed in the valve body along the axial direction of the electromagnetic valve. The first spring is arranged in the second space and used to push the piston to move in a first direction. The valve needle is movably arranged in the first space and used to push the piston to move in a second direction. The temperature conducting element and the temperature control mechanism are both arranged in the second space. The temperature conducting element is fixedly connected to the end of the valve needle through the piston and moves to the temperature control mechanism under the driving of the valve needle. The temperature control mechanism is connected to the first spring, and when the temperature conducting element contacts the temperature control mechanism, the temperature control mechanism drives the first spring to move in the second direction.
2. The electromagnetic valve according to claim 1, characterized by The temperature control mechanism comprises a temperature sensing structure. The temperature sensing structure is provided with a temperature sensing cavity, and the temperature sensing cavity is provided with a temperature sensitive gas. The temperature sensing structure is connected to the first spring, and when the temperature conducting element contacts the temperature sensing structure, the temperature sensitive gas causes the temperature sensing cavity to deform, thereby driving the first spring to move in the second direction.
3. The electromagnetic valve according to claim 2, characterized by The temperature sensing structure comprises a temperature conducting wall arranged along the axial direction of the electromagnetic valve and a deformable side wall arranged along the radial direction of the electromagnetic valve. The temperature conducting wall is used to contact the temperature conducting element. The deformable side wall is connected to the first spring.
4. The electromagnetic valve according to claim 3, characterized by The temperature control mechanism further comprises a pressure bearing disc, which comprises a disc body and a protrusion extending from the first side of the disc body along the axial direction of the electromagnetic valve. The second side of the disc body is connected to the first spring, and the protrusion is connected to the deformable side wall.
5. The electromagnetic valve according to claim 4, characterized by The temperature conducting element comprises a conducting body, a connecting rod extending from the first side of the conducting body along the axial direction, and a connecting wall extending from the second side of the conducting body along the axial direction.
6. The electromagnetic valve according to claim 5, characterized by The electromagnetic valve further comprises an exhaust pipe arranged in the second space; the conducting body is movably installed on the exhaust pipe; the connecting rod is fixedly connected to the end of the valve needle; the inner wall of the connecting wall is arranged opposite to the exhaust pipe; and the outer wall of the connecting wall is used to contact the temperature sensing structure.
7. The electromagnetic valve according to claim 6, characterized by The exhaust pipe is provided with a moving space arranged in the first direction; the temperature conducting element is arranged in the moving space; and the first spring is sleeved on the exhaust pipe and the temperature conducting element. The temperature sensing structure is arranged around the exhaust pipe and has an activity gap with the exhaust pipe for the temperature conducting element.
8. The electromagnetic valve according to claim 1, characterized by The shell is provided with an air inlet communicating with the second space; the electromagnetic valve further comprises a sleeve and a driving assembly; the sleeve is arranged in the valve body, and the first end of the sleeve extends into the first space; The piston and the second end of the sleeve form a pressure cavity; the piston is provided with an air channel communicating the pressure cavity and the second space; The valve needle is arranged in the sleeve; The driving assembly is arranged in the first space and connected to the valve needle, and is used to drive the valve needle to move in the second direction.
9. The electromagnetic valve according to claim 8, characterized by The driving assembly comprises a coil and a second spring; The coil is wound on the sleeve; The sleeve is provided with a movable chamber, and the second spring is arranged in the movable chamber; The second spring is sleeved on the valve needle and connected with the valve needle.
10. The electromagnetic valve according to claim 9, characterized by The valve needle comprises a valve needle body, a tip part extending from one end of the valve needle body in an axial direction of the valve needle, and a stopper extending from the valve needle body in a radial direction of the valve needle. The valve needle body is arranged in the sleeve and the second spring, the tip part is used for connecting with the piston, and the stopper is connected with the second spring.
11. An air conditioning system, characterised in that, The electromagnetic valve comprises the electromagnetic valve according to any one of claims 1-10.