Normally open solenoid valve and automobile heat dissipation system
By placing the elastic element on the side of the plug away from the fixed iron core in the normally open solenoid valve, and adopting a pagoda-shaped spring and diaphragm design, the problems of insufficient closing force and low control accuracy caused by the spring occupying the coil space in the traditional normally open solenoid valve are solved, achieving higher fluid flow efficiency and control stability, while reducing energy consumption and assembly costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-03-24
AI Technical Summary
Traditional normally open solenoid valves suffer from insufficient closing force and low control accuracy because the spring occupies the axial space inside the coil, which reduces the size of the moving or fixed iron core or shortens the stroke.
The elastic element is placed on the side of the plug away from the fixed iron core, and the coil is placed on the periphery of the fixed iron core and the movable iron core to avoid the elastic element occupying the internal space of the coil. At the same time, a pagoda-shaped spring is used to provide greater elastic deformation and elastic force. Combined with the diaphragm, a balance chamber is formed to reduce driving force and energy consumption.
This avoids the problems of insufficient closing force and low control accuracy of normally open solenoid valves, improves fluid flow efficiency and control stability, reduces energy consumption and assembly difficulty, and enhances production efficiency.
Smart Images
Figure CN224033205U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electromagnetic valves, in particular to a normally open electromagnetic valve and an automobile heat dissipation system. BACKGROUND
[0002] In an automobile thermal management system, a normally open electromagnetic valve as a key component for controlling the flow of coolant directly affects the heat dissipation efficiency and energy consumption control of the engine.
[0003] A conventional normally open electromagnetic valve usually includes a coil, a fixed core, a movable core and a spring. A magnetic field is generated by energizing the electromagnetic coil to drive the magnetic force between the fixed core and the movable core, so that the movable core overcomes the elastic force of the spring to realize the closing action of the normally open electromagnetic valve. After power-off, the spring resets to restore the normally open state of the normally open electromagnetic valve. However, in the prior art, the spring is coaxially arranged with the fixed core and the movable core and is nested in the inside of the coil. Since the spring occupies the axial space inside the coil, it will cause the size of the movable core or the fixed core to be reduced or the movement stroke of the movable core to be shortened, thereby causing the normally open electromagnetic valve to have the problems of insufficient closing force and low control precision. CONTENT OF THE UTILITY MODEL
[0004] Therefore, it is necessary to provide a normally open electromagnetic valve capable of solving the above problems.
[0005] To solve the above technical problems, the present application provides the following technical solutions:
[0006] A normally open electromagnetic valve, the normally open electromagnetic valve comprising:
[0007] a valve body having an inlet, an outlet and a valve port, the inlet and the outlet being communicated through the valve port;
[0008] a plugging assembly comprising a plug and a top rod, the plug being connected to the top rod, and the plug being capable of reciprocating under the driving of the top rod to control the opening / closing of the valve port;
[0009] a fixed core fixedly installed in the valve body and arranged opposite the plug, the top rod penetrating through the fixed core;
[0010] a movable core arranged opposite the fixed core and abutting against and limiting the end of the top rod penetrating through the fixed core;
[0011] a resilient member arranged on the side of the plug away from the fixed core and abutting against and limiting the top rod, for providing the resilient force of the plug for opening the valve port;
[0012] a coil arranged at the periphery of the fixed core and the movable core, for driving the movement of the movable core towards the fixed core.
[0013] It can be understood that, by setting one end of the plug to be connected to the top rod abutting the movable iron core, and setting the elastic member on the side of the plug away from the fixed iron core, and setting the coil on the periphery of the fixed iron core and the movable iron core, since the elastic member is set on the side of the plug away from the fixed iron core, the elastic member does not occupy the axial space inside the coil, so it does not cause the size of the movable iron core or the fixed iron core to be reduced or the movement stroke of the movable iron core to be shortened, thereby avoiding the problems of insufficient closing force and low control precision of the normally open electromagnetic valve caused by setting the elastic member inside the coil.
[0014] In one of the embodiments, a step is formed on the valve body, and the step is arranged on the passage through which the inlet communicates with the valve port;
[0015] The elastic member is in abutting position with the step and the top rod in a pre-compressed deformed manner.
[0016] In one of the embodiments, the elastic member is configured as a pagoda-shaped spring.
[0017] It can be understood that, by configuring the elastic member as a pagoda-shaped spring, the shape of the pagoda-shaped spring can provide a larger elastic deformation and elastic force, and under the premise of not increasing the overall size of the normally open electromagnetic valve, the demand for the elastic force of the normally open electromagnetic valve can be better met.
[0018] In one of the embodiments, the plug and the top rod are connected as an integral structure.
[0019] It can be understood that, by setting the plug and the top rod as an integral structure, the number of parts of the normally open electromagnetic valve can be reduced, the preparation of the plug and the top rod is facilitated, thereby reducing the assembly difficulty and cost of the normally open electromagnetic valve, and improving the production efficiency of the normally open electromagnetic valve.
[0020] In one of the embodiments, a diaphragm is sealed between the plug and the fixed iron core, and a balance chamber is formed by the plug, the diaphragm and the fixed iron core;
[0021] A connecting channel is formed on the plugging assembly, and the connecting channel communicates with the balance chamber and the inlet respectively.
[0022] It can be understood that, by setting the diaphragm, and forming the balance chamber by the plug, the fixed iron core and the diaphragm, and by connecting the balance chamber and the inlet through the connecting channel on the plugging assembly, the water pressure on both sides of the plug can be balanced, thereby reducing the driving force required when the normally open electromagnetic valve is closed, reducing the power of the coil, and thereby reducing the energy consumption of the normally open electromagnetic valve.
[0023] In one of the embodiments, the top rod extends into the plug, and the part of the top rod inside the plug is connected to the plug as an integral structure through a plurality of connecting webs;
[0024] The plurality of connecting webs are arranged along the circumferential direction of the top rod, and the two adjacent connecting webs, the top rod and the plug form the connecting channel.
[0025] It can be understood that, by arranging the connecting webs, the connecting channel is formed by the plug, the connecting webs and the top rod, and such a design of the connecting channel reduces the flow resistance of the fluid flowing through the plug and improves the flow efficiency of the fluid.
[0026] In one of the embodiments, a gap channel is formed between the part of the top rod inside the fixed core and the fixed core, and the gap channel communicates with the balance chamber.
[0027] The movable core is provided with a through hole, and the through hole communicates with the gap channel.
[0028] It can be understood that, by arranging the gap channel and the through hole, the fluid can flow smoothly inside the normally open electromagnetic valve, and the flow of the fluid does not affect the opening or closing action of the valve port by the movable core, the top rod and the plug, so that the opening and closing action of the normally open electromagnetic valve is not affected by the fluid flow, thereby improving the control stability of the normally open electromagnetic valve.
[0029] In one of the embodiments, the fixed core is provided with an extension protrusion, and the movable core is provided with a limiting groove matched with the extension protrusion.
[0030] When the movable core moves towards the fixed core, the limiting groove can be inserted and matched with the extension protrusion.
[0031] It can be understood that, by arranging the extension protrusion and the limiting groove, the guiding and limiting effects can be achieved during the movement of the movable core, so as to ensure that the movable core can move along the predetermined trajectory, thereby improving the working reliability of the normally open electromagnetic valve. In addition, the limiting groove formed on the movable core can also play a guiding effect.
[0032] In one of the embodiments, the plug is provided with an open slot at the end away from the fixed core, and the plug is also provided with a plurality of overflow grooves at the bottom of the open slot, which communicate with the open slot and are used for accommodating glue.
[0033] The sealing gasket is arranged in the opening groove and connected with the plug, and the plug can block the valve port through the sealing gasket.
[0034] The application also provides a car heat dissipation system comprising the normally open electromagnetic valve according to any one of the above embodiments.
[0035] Compared with the prior art, the normally open electromagnetic valve is connected with the plug at one end and abuts against the top rod of the movable iron core at the other end, the elastic member is arranged on the side of the plug away from the fixed iron core, and the coil is arranged on the periphery of the fixed iron core and the movable iron core. Since the elastic member is arranged on the side of the plug away from the fixed iron core, the elastic member does not occupy the axial space inside the coil, so that the size of the movable iron core is not reduced or the movement stroke is not shortened, thereby avoiding the problems of insufficient closing force and low control precision of the normally open electromagnetic valve caused by the arrangement of the elastic member inside the coil. BRIEF DESCRIPTION OF DRAWINGS
[0036] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.
[0037] Figure 1 The application provides a structure schematic diagram of a normally open electromagnetic valve.
[0038] Figure 2 The application provides a structure schematic diagram of a normally open electromagnetic valve. Figure 1 The application provides a sectional view of A-A.
[0039] Figure 3 The application provides an exploded view of a normally open electromagnetic valve.
[0040] Figure 4 The application provides an enlarged view of B. Figure 3 The application provides an enlarged view of B.
[0041] The element reference numbers are as follows:
[0042] 100, normally open electromagnetic valve; 10, valve body; 11, inlet; 12, outlet; 13, valve port; 14, step; 20, plugging assembly; 21, plug; 211, diaphragm; 212, balance chamber; 213, connecting channel; 214, opening groove; 215, overflow groove; 216, sealing gasket; 22, top rod; 221, connecting rib plate; 222, gap channel; 30, fixed iron core; 31, through hole; 32, extension protrusion; 40, movable iron core; 41, limiting groove; 50, elastic member; 60, coil. DETAILED DESCRIPTION
[0043] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the detailed description of the specific embodiments of the present application will be described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details. In other instances, well known process steps have not been described in detail in order to avoid obscuring the present application. The description of the specific embodiments of the present application is intended for purposes of illustration, and not for purposes of limitation.
[0044] It is to be understood that where the terms "fixed" or "attached" are used herein, they are to be interpreted broadly to include direct attachment as well as attachment mediated by an intermediary. It is also to be understood that the terms "connected" and "coupled" are to be interpreted broadly to include a direct connection as well as a connection mediated by an intermediary. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like as used herein are for purposes of illustration and description only and are not intended to be limiting.
[0045] In addition, the terms "first", "second", and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Thus, a "first" and / or "second" feature can include at least one of the feature. The meaning of "a", "an", and "the" include singular and plural referents. Therefore, "a" or "an" object can include more than one object.
[0046] In the present application, unless specifically stated and limited otherwise, the terms "on", "under", "above", and "below" can mean direct contact, or indirect contact through an intermediate medium. Also, the terms "on", "above", and "over" can mean directly above or diagonally above, or simply mean that the first feature is higher in horizontal level than the second feature. The terms "under", "below", and "underneath" can mean directly below or diagonally below, or simply mean that the first feature is lower in horizontal level than the second feature.
[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The use of the terms "and / or" includes a combination of one or more of the associated listed items.
[0048] Reference will now be made to Figures 1 to 4The application provides a normally open electromagnetic valve 100, which is commonly used in an automobile heat dissipation system for flow control of cooling liquid, and is not limited thereto. The normally open electromagnetic valve 100 of the application can also be applied to other fields.
[0049] Specifically, the normally open electromagnetic valve 100 comprises a valve body 10, a plugging assembly 20, a fixed core 30, a movable core 40, an elastic member 50, and a coil 60. The valve body 10 has an inlet 11, an outlet 12, and a valve port 13. The inlet 11 and the outlet 12 are communicated through the valve port 13. The plugging assembly 20 comprises a plug 21 and a top rod 22. The plug 21 is connected to the top rod 22 and can reciprocate under the driving of the top rod 22 to control the opening / closing of the valve port 13. The fixed core 30 is fixedly installed in the valve body 10 and is arranged opposite to the plug 21. The top rod 22 penetrates through the fixed core 30. The movable core 40 is arranged opposite to the fixed core 30 and is limited by the end of the top rod 22 penetrating through the fixed core 30. The elastic member 50 is arranged on the side of the plug 21 away from the fixed core 30 and is limited by the top rod 22. The elastic member 50 is used to provide elastic force for the plug 21 to open the valve port 13. The coil 60 is arranged on the periphery of the fixed core 30 and the movable core 40 and is used to drive the movable core 40 to move towards the fixed core 30.
[0050] As can be seen from the above, by arranging the top rod 22 with one end connected to the plug 21 and the other end abutting against the movable core 40, and arranging the elastic member 50 on the side of the plug 21 away from the fixed core 30 and the coil 60 on the periphery of the fixed core 30 and the movable core 40, since the elastic member 50 is arranged on the side of the plug 21 away from the fixed core 30, the elastic member 50 does not occupy the axial space inside the coil 60, so it does not cause the size of the movable core 40 or the fixed core 30 to be reduced or the movement stroke of the movable core 40 to be shortened, thereby avoiding the problems of insufficient closing force and low control precision of the normally open electromagnetic valve 100 caused by the arrangement of the elastic member 50 inside the coil 60.
[0051] As shown in FIG. 1, Figure 2 The valve body 10 is formed with a step 14 on the passage where the inlet 11 and the valve port 13 are communicated. The elastic member 50 is pre-compressed and limited by the step 14 and the top rod 22. In this way, by arranging the step 14 and pre-compressing the elastic member 50 to limit the elastic member 50 by the step 14 and the plug 21, the elastic member 50 can provide stable elastic force when the normally open electromagnetic valve 100 is opened or closed, thereby keeping the normally open electromagnetic valve 100 stable when it is opened or closed.
[0052] In an embodiment, a diaphragm 211 is connected in a sealed manner between the plug 21 and the fixed iron core 30, and a balance chamber 212 is enclosed between the plug 21, the diaphragm 211 and the fixed iron core 30; wherein a connecting channel 213 is formed on the blocking assembly 20 and communicates with the balance chamber 212 and the inlet 11 respectively. In this way, by arranging the diaphragm 211 and forming the balance chamber 212 by the plug 21, the fixed iron core 30 and the diaphragm 211, and by connecting the balance chamber 212 and the inlet 11 through the connecting channel 213 on the blocking assembly 20, the water pressure on both sides of the plug 21 can be balanced, thereby reducing the driving force required when the normally open electromagnetic valve 100 is opened and closed, and reducing the energy consumption of the coil 60.
[0053] Here, the connecting channel 213 can be realized by forming a through hole on the plug 21, or by forming the connecting channel 213 by the plug 21 and the ejector rod 22.
[0054] Further, an open slot 214 is formed on the end of the plug 21 away from the fixed iron core 30, and a plurality of overflow grooves 215 communicating with the open slot 214 are also formed on the plug 21 at the bottom of the open slot 214, and the overflow grooves 215 are used to accommodate glue; wherein the normally open electromagnetic valve 100 further comprises a sealing gasket 216, which is arranged in the open slot 214 and connected with the plug 21, and the plug 21 can block the valve port 13 through the sealing gasket 216. In this way, by arranging the open slot 214 and the overflow grooves 215 on the plug 21, the installation and fixation of the sealing gasket 216 are facilitated, and the overflow grooves 215 can accommodate excess glue to prevent the glue from overflowing and affecting the normal work of other components. It should be explained that when installing the sealing gasket 216, glue needs to be applied in the open slot 214 first, and the purpose of arranging the overflow grooves 215 is to accommodate excess glue to avoid the accumulation of glue during the installation of the sealing gasket 216, which leads to poor installation effect of the sealing gasket 216 and the overflow of glue affecting the work of other components. In this embodiment, the sealing gasket 216 is of a rubber structure and is installed by injection molding. The plug 21 blocks the valve port 13 through the sealing gasket 216 with a flexible rubber structure, which can achieve good blocking effect when the normally open electromagnetic valve 100 is closed.
[0055] Here, the number of overflow grooves 215 can be 4, 6, 8, etc.
[0056] In the embodiment, the plug 21 and the ejector rod 22 are connected as an integrated structure. By setting the plug 21 and the ejector rod 22 as an integrated structure, the number of components of the normally open electromagnetic valve 100 can be reduced, thereby reducing the assembly difficulty and cost of the normally open electromagnetic valve 100, and improving the production efficiency of the normally open electromagnetic valve 100. Here, the material of the plug 21 and the ejector rod 22 is plastic. It needs to be explained that in other embodiments, the plug 21 and the ejector rod 22 can also adopt a split structure, and can be made of other materials (such as stainless steel) in addition to plastic.
[0057] As shown in Figures 2 to 4 , the ejector rod 22 extends into the plug 21, and the part of the ejector rod 22 located in the plug 21 is connected as an integrated structure with the plug 21 through a plurality of connecting webs 221; the plurality of connecting webs 221 are arranged along the circumferential direction of the ejector rod 22, and adjacent two connecting webs 221 and the ejector rod 22 and the plug 21 respectively enclose a connecting passage 213. By setting the connecting web 221, the connecting passage 213 is enclosed by the plug 21, the connecting web 221 and the ejector rod 22, which facilitates processing and reduces the flow resistance of the fluid flowing through the plug 21, thereby improving the flow efficiency of the fluid.
[0058] Here, the number of connecting webs 221 can be configured as 3, 4, 6, 8, etc.
[0059] In an embodiment, a gap passage 222 is formed between the part of the ejector rod 22 located in the fixed core 30 and the fixed core 30, and the gap passage 222 communicates with the balance chamber 212; wherein the movable core 40 is provided with a through hole 31, and the through hole 31 communicates with the gap passage 222. By setting the gap passage 222 and the through hole 31, the fluid can flow smoothly inside the normally open electromagnetic valve 100, and the flow of the fluid will not affect the opening or closing action of the movable core 40, the ejector rod 22 and the plug 21 on the valve port 13, so that the opening and closing action of the normally open electromagnetic valve 100 will not be affected by the flow of the fluid, thereby improving the control stability of the normally open electromagnetic valve 100.
[0060] In the embodiment, the cross section of the ejector rod 22 is cross-shaped, and the existence of the four-corner notches makes the ejector rod 22 and the fixed core 30 enclose four gap passages 222. It can be understood that by setting the cross section of the ejector rod 22 as a specific shape with notches, the shape, cross-sectional area and number of the gap passages 222 can be changed. In addition, in other embodiments, the gap passage 222 can also be formed by changing the shape of the ejector rod 22 or the shape of the through hole 31 of the fixed core 30.
[0061] As shown in Figure 2As shown, the fixed iron core 30 is formed with an extension protrusion 32, and the movable iron core 40 is formed with a limiting groove 41, which is matched with the extension protrusion 32; when the movable iron core 40 moves towards the fixed iron core 30, the limiting groove 41 can be inserted and matched with the extension protrusion 32. By setting the extension protrusion 32 and the limiting groove 41, the guiding and limiting effects can be achieved during the movement of the movable iron core 40, so as to ensure that the movable iron core 40 can move along the predetermined track, and the working reliability of the normally open electromagnetic valve 100 is improved. In addition, the limiting groove 41 formed on the movable iron core 40 can also play a guiding effect.
[0062] In an embodiment, the elastic member 50 is configured as a pagoda-shaped spring. The shape of the pagoda-shaped spring can provide a larger elastic deformation amount and elastic force, and under the premise of not increasing the overall size of the normally open electromagnetic valve 100, the elastic force requirement of the normally open electromagnetic valve 100 can be better met.
[0063] The application also provides the following technical solutions: an automobile heat dissipation system comprising the normally open electromagnetic valve 100 according to any one of the above embodiments.
[0064] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.
[0065] The above embodiments only express several implementation manners of the application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are all within the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.
Claims
1. A normally open solenoid valve characterized by comprising: The application relates to a normally open electromagnetic valve (100) comprising: a valve body (10) having an inlet (11), an outlet (12) and a valve port (13) in communication between the inlet (11) and the outlet (12) through the valve port (13); a blocking assembly (20) comprising a plug (21) and a top rod (22), the plug (21) being connected to the top rod (22) and capable of reciprocating under the driving of the top rod (22) to control the opening / closing of the valve port (13); a fixed core (30) fixedly installed in the valve body (10) and arranged opposite the plug (21), the top rod (22) penetrating through the fixed core (30); a movable core (40) arranged opposite the fixed core (30) and abutting against and limiting the one end of the top rod (22) penetrating through the fixed core (30); a resilient member (50) arranged on the side of the plug (21) away from the fixed core (30) and abutting against and limiting the top rod (22) for providing the resilient force of the plug (21) to open the valve port (13); a coil (60) arranged at the periphery of the fixed core (30) and the movable core (40) for driving the movable core (40) to move towards the fixed core (30).
2. The normally open solenoid valve according to claim 1, characterized by The valve body (10) is formed with a step (14) arranged on the passage in communication between the inlet (11) and the valve port (13); wherein the resilient member (50) is in abutting and limiting connection with the step (14) and the top rod (22) in a pre-compressed deformation mode.
3. The normally open solenoid valve according to claim 1, characterized by The resilient member (50) is configured as a pagoda-shaped spring.
4. The normally open solenoid valve according to claim 1, characterized by The plug (21) and the top rod (22) are connected as an integrated structure.
5. The normally open solenoid valve according to claim 1, wherein The plug (21) and the fixed core (30) are connected in sealing with a diaphragm (211), and the plug (21), the diaphragm (211) and the fixed core (30) enclose a balance chamber (212); wherein the blocking assembly (20) is provided with a connecting channel (213) in communication with the balance chamber (212) and the inlet (11) respectively.
6. The normally open solenoid valve according to claim 5, wherein The top rod (22) extends into the plug (21), and the part of the top rod (22) located in the plug (21) and the plug (21) are connected as an integrated structure through a plurality of connecting rib plates (221); The plurality of connecting rib plates (221) are arranged along the circumferential direction of the top rod (22) and enclose the connecting channel (213) with the top rod (22) and the plug (21) respectively.
7. The normally open solenoid valve according to claim 5, wherein The part of the top rod (22) located in the fixed core (30) and the fixed core (30) form a gap channel (222) in communication with the balance chamber (212); The movable iron core (40) is provided with a through hole (31) which is communicated with the gap channel (222).
8. The normally open solenoid valve according to claim 1, wherein The fixed iron core (30) is provided with an extension protrusion (32), and the movable iron core (40) is provided with a limiting groove (41) which is matched with the extension protrusion (32). When the movable iron core (40) moves towards the fixed iron core (30), the limiting groove (41) is inserted into the extension protrusion (32) in a matched mode.
9. The normally open solenoid valve according to claim 1, wherein The end of the plug (21) away from the fixed iron core (30) is provided with an open groove (214), and a plurality of overflow grooves (215) which are communicated with the open groove (214) are further provided at the bottom of the open groove (214), and the overflow grooves (215) are used for accommodating glue. The normally open electromagnetic valve (100) further comprises a sealing gasket (216) which is arranged in the open groove (214) and connected with the plug (21), and the plug (21) can seal the valve port (13) through the sealing gasket (216).
10. An automobile heat radiation system characterized by comprising: The normally open electromagnetic valve (100) comprises the plug (21), the fixed iron core (30), the movable iron core (40), the sealing gasket (216), the valve port (13), the gap channel (222), the extension protrusion (32) and the limiting groove (41).