Direct-acting electromagnetic valve and vehicle heat dissipation system

Abstract

The utility model relates to the technical field of flow control, in particular to a direct-acting electromagnetic valve and a vehicle heat dissipation system. The direct-acting electromagnetic valve comprises a valve body, an inner valve body and an ejector rod assembly, the ejector rod assembly is provided with a diaphragm, and a stress part is formed on the ejector rod assembly; when the direct-acting electromagnetic valve is in a power-on state, the ejector rod assembly drives the diaphragm to block the normally-open valve port, so that the liquid inlet channel communicates with the second liquid outlet channel, a first channel is formed, and a medium in the first channel generates pressure in two opposite directions on the diaphragm and the stress part; when the direct-acting electromagnetic valve is in a power-off state, the ejector rod assembly drives the diaphragm to block the normally-closed valve port, so that the liquid inlet channel is communicated with the first liquid outlet channel to form a second channel, and a medium in the second channel generates pressure in the pressure direction on the diaphragm. And the pressure direction of the pressure generated by the medium flowing out of the second channel through the connecting channel on the stress part is opposite. According to the direct-acting electromagnetic valve, control over movement of the ejector rod assembly can be achieved through the low-power coil under the high-pressure working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to flow control technical field, especially a direct acting electromagnetic valve and vehicle heat dissipation system. BACKGROUND

[0002] As the core component in fluid control field, electromagnetic valve is widely used in building water supply system, heating ventilation air conditioning, industrial equipment and other fields, mainly used for driving valve core action through electromagnetic force, realizing fluid on-off or flow regulation.

[0003] It can be understood that the working performance of electromagnetic valve is significantly affected by water pressure fluctuation, especially when working under high pressure condition (such as >=2.0bar), water pressure will generate additional pressure on the top rod assembly of electromagnetic valve, which will cause the coil in electromagnetic valve to overcome greater resistance to drive valve core action. At present, in order to adapt to high pressure working condition environment, the existing electromagnetic valve is realized by increasing the power consumption of coil, however, the increase of power consumption of coil will cause the coil to overheat when working, thereby causing the service life of coil to be shortened, and even causing the electromagnetic valve to fail, which will affect the stability and energy efficiency of the system working with the electromagnetic valve. SUMMARY

[0004] Therefore, it is necessary to provide a direct acting electromagnetic valve and vehicle heat dissipation system capable of solving the above technical problems.

[0005] To solve the above technical problems, the application provides the following technical scheme:

[0006] A direct acting electromagnetic valve, the direct acting electromagnetic valve comprises:

[0007] A valve body having a liquid inlet channel, a normally open valve port, a first liquid outlet channel and a second liquid outlet channel, the first liquid outlet channel being capable of communicating with the liquid inlet channel through the normally open valve port;

[0008] An inner valve body having a normally closed valve port, the liquid inlet channel being capable of communicating with the second liquid outlet channel through the normally closed valve port;

[0009] A top rod assembly having a diaphragm installed, the diaphragm being capable of switching and plugging the normally open valve port and the normally closed valve port under the driving of the top rod assembly, a connecting channel being formed in the top rod assembly, the connecting channel having an inlet and an outlet, the outlet being independently arranged from the second liquid outlet channel;

[0010] Wherein, a stress receiving part is formed on the top rod assembly, and the stress receiving part is arranged between the outlet and the second liquid outlet channel along the movement direction of the top rod assembly;

[0011] When the direct-acting electromagnetic valve is in the energized state, the top rod assembly drives the diaphragm to block the normally open valve port, so that the liquid inlet channel is communicated with the second liquid outlet channel and a first passage is formed, and the medium in the first passage generates two opposite directions of pressure on the diaphragm and the force receiving part; when the direct-acting electromagnetic valve is in the de-energized state, the top rod assembly drives the diaphragm to block the normally closed valve port, so that the liquid inlet channel is communicated with the first liquid outlet channel and a second passage is formed, and the pressure direction of the pressure of the medium in the second passage on the diaphragm is opposite to the pressure direction of the pressure of the medium in the second passage on the force receiving part via the connecting channel.

[0012] In one of the embodiments, when the direct-acting electromagnetic valve is in the energized state, the pressure values of the pressure of the medium in the first passage on the diaphragm and the force receiving part are equal.

[0013] In one of the embodiments, the direct-acting electromagnetic valve further comprises a movable core, a through hole is formed in the movable core and communicated with the outlet, and one end of the top rod assembly abuts against the movable core at the position of the hole of the through hole;

[0014] When the direct-acting electromagnetic valve is in the de-energized state, the part of the top rod assembly on the movable core is subjected to the pressure of the medium flowing out of the connecting channel, and the pressure value of the pressure of the medium on the diaphragm is equal to the sum of the pressure values of the pressure of the medium on the force receiving part and the top rod assembly.

[0015] In one of the embodiments, the top rod assembly comprises a first top rod and a second top rod, the second top rod is arranged at one end of the first top rod and connected with the first top rod;

[0016] The diaphragm is arranged at one end of the first top rod away from the second top rod, the force receiving part is arranged on the outer periphery of the second top rod, and the connecting channel is arranged through the first top rod and extends into the second top rod.

[0017] In one of the embodiments, the direct-acting electromagnetic valve further comprises a fixed core, a movable core and a core spring;

[0018] The second top rod is arranged through the fixed core and abuts against the movable core, and the core spring is sleeved on the first top rod and abuts against the diaphragm and the boss on the first top rod.

[0019] In one of the embodiments, an extension protrusion is formed on the fixed core, a limiting groove is formed in the movable core, and the limiting groove can be inserted and matched with the extension protrusion;

[0020] The second top rod is arranged through the extended protrusion.

[0021] In one of the embodiments, the direct-acting electromagnetic valve further comprises a first diaphragm and a second diaphragm, which are arranged on both sides of the force receiving part along the movement direction of the top rod assembly and are connected with the top rod assembly respectively.

[0022] The outlet is arranged on the side of the second diaphragm away from the force receiving part.

[0023] In the energized state of the direct-acting electromagnetic valve, the medium in the first passage can provide pressure to the force receiving part through the first diaphragm; in the de-energized state of the direct-acting electromagnetic valve, the medium flowing out of the connecting channel can provide pressure to the force receiving part through the second diaphragm.

[0024] In one of the embodiments, the direct-acting electromagnetic valve further comprises a first retainer ring and a second retainer ring, which are installed in the valve body.

[0025] The first retainer ring is matched with the inner valve body to clamp and fix the outer periphery of the first diaphragm, and the second retainer ring is matched with the first retainer ring to clamp and fix the outer periphery of the second diaphragm, so that the first diaphragm, the second diaphragm and the first retainer ring form a closed cavity for accommodating the force receiving part.

[0026] In one of the embodiments, the direct-acting electromagnetic valve further comprises a filter screen, which is arranged at the position of the inlet and is connected with the top rod assembly to filter the medium introduced into the connecting channel.

[0027] The application also claims a vehicle heat dissipation system comprising the direct-acting electromagnetic valve.

[0028] Thanks to the application of the above scheme, the application has the following advantages compared with the prior art:

[0029] The direct-acting electromagnetic valve and the vehicle heat dissipation system claimed in the application can reduce the influence of the medium on the movement of the top rod assembly, so that the direct-acting electromagnetic valve can control the movement of the top rod assembly with a low-power coil in a high-pressure working condition, thereby widening the high-pressure application range of the direct-acting electromagnetic valve. BRIEF DESCRIPTION OF DRAWINGS

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a direct-acting solenoid valve provided in an embodiment of this application.

[0032] Figure 2 This is a schematic diagram of the direct-acting solenoid valve provided in one embodiment of this application from another perspective.

[0033] Figure 3 for Figure 2 The cross-sectional view at point AA shows the direct-acting solenoid valve in the de-energized state.

[0034] Figure 4 for Figure 2 The cross-sectional view at point AA shows the direct-acting solenoid valve in the energized state and the filter screen in the concealed state.

[0035] Figure 5 This is an exploded view of a direct-acting solenoid valve provided in an embodiment of this application.

[0036] Reference numerals: 100, Direct-acting solenoid valve; 101, First passage; 102, Second passage; 103, Sealed chamber; 10, Valve body; 11, Inlet channel; 12, Normally open valve port; 13, First outlet channel; 14, Second outlet channel; 20, Inner valve body; 21, Normally closed valve port; 30, Push rod assembly; 32, Connecting channel; 321, Inlet; 322, Outlet; 33, Force-receiving part; 34, First push rod; 341, Boss; 35, Second push rod; 41, Fixed iron core; 411, Extending protrusion; 42, Movable iron core; 421, Through hole; 422, Limiting groove; 43, Iron core spring; 50, Diaphragm; 60, First diaphragm; 70, Second diaphragm; 80, First retaining ring; 90, Second retaining ring; 110, Filter screen; 120, Snap ring; 130, Coil. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] It is to be understood that where the terms specific, "fixed", or "set" are used herein, such terms are intended to mean that the component is either directly on another component or can be indirectly on another component with intervening components present. Where the term "connected" is used herein, such term is intended to mean that the component is either directly connected to another component or can be indirectly connected to another component with intervening components present. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar terms are used herein only to facilitate describing the particular embodiments and are in no way meant to indicate an absolute orientation with respect to gravity or a fixed absolute direction.

[0039] In addition, the terms "first", "second", and the like, do not denote any order, quantity, combination or importance, but rather are used to nomenclature different components. Thus, such terms are used herein, "a" or "an" entity can refer to both a single entity or a plurality of the entities. As such, the terms "a" (or "an"), "one or more" and "at least one" can be used interchangeably herein. The terms "plurality" and "multiple" are used herein to mean two or more.

[0040] In the present application, unless specifically stated and limited otherwise, the use of the terms "on", "under", "above", and "on top of", when used to describe the positional relationship between components, can mean that a first component is directly in contact with a second component, or indirectly in contact with the second component via an intermediate medium. In addition, the terms "on", "above", and "on top of" can mean that a first component is directly above or diagonally above a second component, or simply means that the first component is horizontally higher than the second component. The terms "under", "below", and "underneath" can mean that a first component is directly below or diagonally below a second component, or simply means that the first component is horizontally lower than the second component.

[0041] 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. All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety for the purpose of describing and disclosing

[0042] As Figures 1 to 5As shown, the direct-acting electromagnetic valve 100 provided by an embodiment of the present application comprises a valve body 10, an inner valve body 20 and a top rod assembly 30. The valve body 10 has a liquid inlet channel 11, a normally-open valve port 12, a first liquid outlet channel 13 and a second liquid outlet channel 14. The first liquid outlet channel 13 can communicate with the liquid inlet channel 11 through the normally-open valve port 12. The inner valve body 20 has a normally-closed valve port 21. The liquid inlet channel 11 can communicate with the second liquid outlet channel 14 through the normally-closed valve port 21. The top rod assembly 30 is installed with a diaphragm 50. The diaphragm 50 can be switched and blocked to the normally-open valve port 12 and the normally-closed valve port 21 under the driving of the top rod assembly 30. The top rod assembly 30 is provided with a connecting channel 32. The connecting channel 32 has an inlet 321 and an outlet 322. The outlet 322 is independently arranged from the second liquid outlet channel 14. The top rod assembly 30 is formed with a force receiving portion 33. Along the movement direction of the top rod assembly 30, the force receiving portion 33 is arranged between the outlet 322 and the second liquid outlet channel 14. When the direct-acting electromagnetic valve 100 is in the energized state, the top rod assembly 30 drives the diaphragm 50 to block the normally-open valve port 12, so that the liquid inlet channel 11 communicates with the second liquid outlet channel 14 and forms a first passage 101. The medium (not shown in the figure) in the first passage 101 generates two opposite pressures on the diaphragm 50 and the force receiving portion 33. When the direct-acting electromagnetic valve 100 is in the de-energized state, the top rod assembly 30 drives the diaphragm 50 to block the normally-closed valve port 21, so that the liquid inlet channel 11 communicates with the first liquid outlet channel 13 and forms a second passage 102. The pressure direction of the pressure generated by the medium in the second passage 102 on the diaphragm 50 is opposite to the pressure direction of the pressure generated by the medium flowing out of the connecting channel 32 on the force receiving portion 33. Here, the medium can be cooling liquid or water.

[0043] It can be understood that, when the direct-acting electromagnetic valve 100 is in the energized state, the pressures generated by the medium in the first passage 101 on the diaphragm 50 and the force receiving portion 33 are two opposite pressures. When the direct-acting electromagnetic valve 100 is in the de-energized state, the pressures generated by the medium in the second passage 102 on the diaphragm 50 and the medium flowing out of the connecting channel 32 on the force receiving portion 33 are two opposite pressures. In this way, the influence of the medium on the movement of the top rod assembly 30 can be reduced. The direct-acting electromagnetic valve 100 can be controlled by a low-power coil 130 to move the top rod assembly 30 in the high-pressure working condition, thereby widening the high-pressure application range of the direct-acting electromagnetic valve 100.

[0044] As shown in the figure, Figure 3 , Figure 4As shown in the figure, in an embodiment, when the direct-acting electromagnetic valve 100 is in the energized state, the pressure value of the medium in the first passage 101 acting on the diaphragm 50 and the force receiving portion 33 is equal. The medium in the first passage 101 does not generate resistance to the movement of the top rod assembly 30, so that the direct-acting electromagnetic valve 100 can further reduce the power of the coil 130 when working under high pressure. It should be noted that, because the pressure of the medium in the first passage 101 is the same, the pressure of the medium is the same, so that the direct-acting electromagnetic valve 100 only needs to consider that the force receiving area of the diaphragm 50 when acted on by the medium and the force receiving area of the force receiving portion 33 when acted on by the medium are the same when designing.

[0045] As shown in the figure, Figure 3 , Figure 4 in an embodiment, the direct-acting electromagnetic valve 100 further comprises a movable core 42, the movable core 42 is provided with a through hole 421 communicated with the outlet 322, and one end of the top rod assembly 30 abuts against the movable core 42 at the hole position of the through hole 421; when the direct-acting electromagnetic valve 100 is in the de-energized state, the part of the top rod assembly 30 located on the movable core 42 is subjected to the pressure of the medium flowing out of the connecting channel 32, and the pressure value of the diaphragm 50 when subjected to the medium pressure is equal to the sum of the pressure values of the force receiving portion 33 and the top rod assembly 30 when subjected to the medium pressure. That is, when the direct-acting electromagnetic valve 100 switches from the de-energized state to the energized state, the medium does not generate resistance to the movement of the top rod assembly 30, so that the direct-acting electromagnetic valve 100 can drive the top rod assembly 30 to block the normally open valve port 12 only by overcoming the elastic force of the core spring 43, the pressure of the first diaphragm 60 and the second diaphragm 70 when deformed, so that the direct-acting electromagnetic valve 100 can further reduce the power of the coil 130 when working under high pressure. It should be noted that, because the pressure of the medium is the same, the pressure of the medium is the same, so that the direct-acting electromagnetic valve 100 only needs to consider that the force receiving area of the diaphragm 50 when acted on by the medium is equal to the sum of the force receiving areas of the force receiving portion 33 and the top rod assembly 30 when acted on by the medium when designing.

[0046] As shown in the figure, Figure 3 , Figure 4 in an embodiment, the top rod assembly 30 comprises a first top rod 34 and a second top rod 35, the second top rod 35 is arranged at one end of the first top rod 34 and connected with the first top rod 34; wherein the diaphragm 50 is installed at one end of the first top rod 34 away from the second top rod 35, the force receiving portion 33 is arranged on the outer periphery of the second top rod 35, and the connecting channel 32 penetrates through the first top rod 34 and extends into the second top rod 35. That is, the first top rod 34 and the second top rod 35 are arranged separately and combined to form the top rod assembly 30, so that the production and preparation of the top rod assembly 30 can be facilitated.

[0047] As shown in the figure, Figure 3、 Figure 4 As shown in the figure, in an embodiment, the direct-acting electromagnetic valve 100 further comprises a fixed core 41 and a core spring 43; the second top rod 35 is arranged through the fixed core 41 and abuts against the movable core 42, the core spring 43 is sleeved on the first top rod 34 and abuts against the diaphragm 50 and the boss 341 on the first top rod 34 respectively. So that when the direct-acting electromagnetic valve 100 is in a power-off state, the top rod assembly 30 is pushed by the core spring 43 to drive the diaphragm 50 to block the normally closed valve port 21; when the direct-acting electromagnetic valve 100 is in a power-on state, the movable core 42 is attracted to the fixed core 41 and pushes the top rod assembly 30 under the action of the magnetic field generated after the coil 130 is powered on, so as to drive the diaphragm 50 to block the normally open valve port 12.

[0048] As shown in the figure, Figure 3 、 Figure 4 As shown in the figure, in an embodiment, the fixed core 41 is formed with an extension boss 411, the movable core 42 is formed with a limiting groove 422, the limiting groove 422 can be inserted and matched with the extension boss 411; wherein the second top rod 35 is arranged through the extension boss 411. In this way, the direct-acting electromagnetic valve 100 does not need to reserve space for the movement of the movable core 42 relative to the fixed core 41, so that the space required for assembling the fixed core 41 and the movable core 42 can be reduced, thereby reducing the overall volume of the direct-acting electromagnetic valve 100.

[0049] As shown in the figure, Figure 3 、 Figure 4 As shown in the figure, in an embodiment, the through hole 421 can communicate with the outlet 322 through the fixed core 41; when the direct-acting electromagnetic valve 100 is in a power-off state, the medium flowing out of the outlet 322 can enter the through hole 421, and the medium in the through hole 421 can generate pressure on the second top rod 35.

[0050] As shown in the figure, Figure 3 、 Figure 4As shown in the drawings, in an embodiment, the direct-acting electromagnetic valve 100 further comprises a first diaphragm 60 and a second diaphragm 70, which are arranged on both sides of the force receiving part 33 along the movement direction of the plunger assembly 30 and are connected with the plunger assembly 30 respectively; wherein the outlet 322 is arranged on the side of the second diaphragm 70 away from the force receiving part 33; in the energized state of the direct-acting electromagnetic valve 100, the medium in the first passage 101 can provide pressure for the force receiving part 33 through the first diaphragm 60; in the de-energized state of the direct-acting electromagnetic valve 100, the medium flowing out of the connecting channel 32 can provide pressure for the force receiving part 33 through the second diaphragm 70. Here, the first diaphragm 60 and the second diaphragm 70 are connected with the plunger assembly 30 in a tight-fitting manner respectively, and the pressure deformation of the first diaphragm 60 and the second diaphragm 70 is used to follow the movement of the plunger assembly 30 respectively, so that the first diaphragm 60 and the second diaphragm 70 do not have relative movement with the plunger assembly 30 when they follow the movement of the plunger assembly 30, which can prevent the first diaphragm 60 and the second diaphragm 70 from being abraded when they move, and can also prevent impurities in the medium in the valve body 10 from causing abrasion to the first diaphragm 60 and the second diaphragm 70 when they move, so that the service life of the first diaphragm 60 and the second diaphragm 70 can be prolonged, the requirements of the direct-acting electromagnetic valve 100 on the medium can be reduced, and the versatility of the direct-acting electromagnetic valve 100 can be improved. Here, the first diaphragm 60 and the second diaphragm 70 are arranged as rubber parts respectively.

[0051] As shown in the drawings, Figure 3 , Figure 4 As shown in the drawings, in an embodiment, the direct-acting electromagnetic valve 100 further comprises a first diaphragm 60 and a second diaphragm 70, which are arranged on both sides of the force receiving part 33 along the movement direction of the plunger assembly 30 and are connected with the plunger assembly 30 respectively; wherein the outlet 322 is arranged on the side of the second diaphragm 70 away from the force receiving part 33; in the energized state of the direct-acting electromagnetic valve 100, the medium in the first passage 101 can provide pressure for the force receiving part 33 through the first diaphragm 60; in the de-energized state of the direct-acting electromagnetic valve 100, the medium flowing out of the connecting channel 32 can provide pressure for the force receiving part 33 through the second diaphragm 70. Here, the first diaphragm 60 and the second diaphragm 70 are connected with the plunger assembly 30 in a tight-fitting manner respectively, and the pressure deformation of the first diaphragm 60 and the second diaphragm 70 is used to follow the movement of the plunger assembly 30 respectively, so that the first diaphragm 60 and the second diaphragm 70 do not have relative movement with the plunger assembly 30 when they follow the movement of the plunger assembly 30, which can prevent the first diaphragm 60 and the second diaphragm 70 from being abraded when they move, and can also prevent impurities in the medium in the valve body 10 from causing abrasion to the first diaphragm 60 and the second diaphragm 70 when they move, so that the service life of the first diaphragm 60 and the second diaphragm 70 can be prolonged, the requirements of the direct-acting electromagnetic valve 100 on the medium can be reduced, and the versatility of the direct-acting electromagnetic valve 100 can be improved. Here, the first diaphragm 60 and the second diaphragm 70 are arranged as rubber parts respectively.

[0052] AsFigure 3 、 Figure 4 As shown in FIG. 1, in an embodiment, the direct-acting electromagnetic valve 100 further comprises a filter screen 110, which is arranged at the position of the inlet 321 and connected with the top rod assembly 30, and is used for filtering the medium introduced into the connecting channel 32, so that the impurities in the medium can be prevented from entering into the connecting channel 32 through the inlet 321, and thus the requirement of the direct-acting electromagnetic valve 100 on the medium can be reduced, and the versatility of the direct-acting electromagnetic valve 100 is further improved. Here, the filter screen 110 is connected with the first top rod 34 in a threaded manner, so that the assembly and connection of the filter screen 110 on the top rod assembly 30 can be facilitated.

[0053] As shown in FIG. 1, in an embodiment, the direct-acting electromagnetic valve 100 further comprises a clamp spring 120, and the diaphragm 50 is limited to the first top rod 34 by the clamp spring 120. Figure 3 Figure 4 Figures 3 to 5

[0054] The present application also provides a vehicle heat dissipation system (not shown in the figure), which comprises the above-mentioned direct-acting electromagnetic valve 100.

[0055] In summary, the direct-acting electromagnetic valve 100 and the vehicle heat dissipation system claimed by the present application can reduce the influence of the medium on the movement of the top rod assembly 30, so that the direct-acting electromagnetic valve 100 can achieve the control of the movement of the top rod assembly 30 by using a low-power coil 130 under high-pressure working conditions, and the high-pressure application range of the direct-acting electromagnetic valve 100 is widened.

[0056] The technical features of the above-mentioned embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-mentioned 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 present application.

[0057] The above-mentioned embodiments only express several implementation manners of the present 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 present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.​

Claims

1. A direct-acting solenoid valve, characterized in that, The direct-acting solenoid valve (100) includes: The valve body (10) has an inlet channel (11), a normally open valve port (12), a first outlet channel (13) and a second outlet channel (14), wherein the first outlet channel (13) can communicate with the inlet channel (11) through the normally open valve port (12); The inner valve body (20) has a normally closed valve port (21), and the liquid inlet channel (11) can be connected to the second liquid outlet channel (14) through the normally closed valve port (21); The push rod assembly (30) is equipped with a diaphragm (50). The diaphragm (50) can switch and block the normally open valve port (12) and the normally closed valve port (21) under the drive of the push rod assembly (30). The push rod assembly (30) has a connecting channel (32) with an inlet (321) and an outlet (322). The outlet (322) is set independently of the second liquid outlet channel (14). The push rod assembly (30) has a force-receiving part (33) formed thereon, and along the movement direction of the push rod assembly (30), the force-receiving part (33) is located between the outlet (322) and the second liquid outlet channel (14); When the direct-acting solenoid valve (100) is energized, the push rod assembly (30) drives the diaphragm (50) to block the normally open valve port (12), so that the inlet channel (11) and the second outlet channel (14) are connected and a first passage (101) is formed. The medium in the first passage (101) generates two opposite pressures on the diaphragm (50) and the force-receiving part (33). When the direct-acting solenoid valve (100) is de-energized, the push rod assembly (30) drives the diaphragm (50) to block the normally closed valve port (21), so that the inlet channel (11) and the first outlet channel (13) are connected and a second passage (102) is formed. The pressure direction of the medium in the second passage (102) on the diaphragm (50) is opposite to the pressure direction of the medium in the second passage (102) flowing out through the connecting channel (32) on the force-receiving part (33).

2. The direct-acting solenoid valve according to claim 1, characterized in that, When the direct-acting solenoid valve (100) is energized, the pressure values ​​generated by the medium in the first passage (101) on the diaphragm (50) and the force-receiving part (33) are equal.

3. The direct-acting solenoid valve according to claim 1, characterized in that, The direct-acting solenoid valve (100) also includes a movable iron core (42), on which a through hole (421) communicating with the outlet (322) is provided, and one end of the push rod assembly (30) abuts against the movable iron core (42) at the position of the through hole (421). When the direct-acting solenoid valve (100) is de-energized, the portion of the push rod assembly (30) located on the movable iron core (42) is subjected to the pressure of the medium flowing out of the connecting channel (32), and the pressure value of the diaphragm (50) under the medium pressure is equal to the sum of the pressure values ​​of the force-bearing part (33) and the push rod assembly (30) under the medium pressure respectively.

4. The direct-acting solenoid valve according to claim 1, characterized in that, The push rod assembly (30) includes a first push rod (34) and a second push rod (35), wherein the second push rod (35) is disposed at one end of the first push rod (34) and connected to the first push rod (34); The diaphragm (50) is mounted on the first push rod (34) at one end away from the second push rod (35), the force-receiving part (33) is disposed on the outer periphery of the second push rod (35), and the connecting channel (32) passes through the first push rod (34) and extends into the second push rod (35).

5. The direct-acting solenoid valve according to claim 4, characterized in that, The direct-acting solenoid valve (100) also includes a fixed iron core (41), a movable iron core (42), and an iron core spring (43); The second push rod (35) passes through the fixed iron core (41) and abuts against the movable iron core (42). The iron core spring (43) is fitted on the first push rod (34) and abuts against the diaphragm (50) and the boss (341) on the first push rod (34) respectively.

6. The direct-acting solenoid valve according to claim 5, characterized in that, An extension protrusion (411) is formed on the fixed iron core (41), and a limiting groove (422) is provided on the movable iron core (42). The limiting groove (422) can be inserted and engaged with the extension protrusion (411). The second push rod (35) is disposed through the extension protrusion (411).

7. The direct-acting solenoid valve according to claim 1, characterized in that, The direct-acting solenoid valve (100) further includes a first diaphragm (60) and a second diaphragm (70). Along the movement direction of the push rod assembly (30), the first diaphragm (60) and the second diaphragm (70) are disposed on both sides of the force-receiving part (33) and are respectively connected to the push rod assembly (30). The outlet (322) is located on the side of the second diaphragm (70) away from the force-bearing part (33); When the direct-acting solenoid valve (100) is energized, the medium in the first passage (101) can provide pressure to the force-receiving part (33) through the first diaphragm (60); when the direct-acting solenoid valve (100) is de-energized, the medium flowing out of the connecting channel (32) can provide pressure to the force-receiving part (33) through the second diaphragm (70).

8. The direct-acting solenoid valve according to claim 7, characterized in that, The direct-acting solenoid valve (100) further includes a first retaining ring (80) and a second retaining ring (90), which are installed inside the valve body (10). The first retaining ring (80) cooperates with the inner valve body (20) to clamp and fix the outer periphery of the first diaphragm (60), and the second retaining ring (90) cooperates with the first retaining ring (80) to clamp and fix the outer periphery of the second diaphragm (70), so that the first diaphragm (60), the second diaphragm (70) and the first retaining ring (80) form a sealed chamber (103), which is used to accommodate the force-bearing part (33).

9. The direct-acting solenoid valve according to claim 1, characterized in that, The direct-acting solenoid valve (100) also includes a filter screen (110), which is located at the inlet (321) and connected to the push rod assembly (30) for filtering the medium introduced into the connection channel (32).

10. A vehicle cooling system, characterized in that, Includes the direct-acting solenoid valve (100) as described in any one of claims 1 to 9.

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