A plastic one-way water valve for new energy vehicles

Abstract

The present invention discloses a plastic one-way water valve for new energy vehicles, comprising a plastic valve body and a valve core. The valve core is fixed within the plastic valve body. The valve core comprises a metal valve seat, a metal bushing, a steel ball, and a spring. The metal valve seat comprises a front valve cylinder and a rear valve cylinder. The diameter of the rear valve cylinder is smaller than that of the front valve cylinder. The left end of the rear valve cylinder is welded to the right end of the front valve cylinder, and the rear valve cylinder and the front valve cylinder are connected. A retaining ring is fixed to the right end of the inner wall of the rear valve cylinder. The spring is horizontally arranged within the rear valve cylinder. The metal bushing is threadedly fixed to the inner wall of the front valve cylinder. A valve seat hole is defined in the right side wall of the metal bushing. The steel ball is located within the rear valve cylinder. This one-way water valve has a simple structure, low weight, small size, and low cost. The steel ball, metal bushing, and spring within the valve core cooperate to achieve one-way delivery of refrigerant. The steel ball and metal bushing cooperate to effectively prevent liquid backflow. Furthermore, this device provides a tight connection with other components, enhancing the safety of the piping system.

Description

Technical Field

[0001] The present invention relates to the field of drainage devices, and more specifically, to a plastic one-way water valve for new energy vehicles. Background Art

[0002] In the refrigerant circuit of the thermal management system or air conditioning system of new energy vehicles, a two-way plastic water valve with a servo motor is often used to replace the one-way water valve (such as Figure 3 As shown), some will use industrial stainless steel one-way water valves or industrial copper one-way water valves as a substitute. However, when using a connected plastic water valve with a servo motor, since the servo motor needs to be driven to realize the control function, an external control device needs to be added. This not only makes the overall design of the system complicated and increases the cost, which is not conducive to the requirements of lightweight production design of automobiles, but also the servo motor is not resistant to the pressure pulse of the reverse flow of refrigerant, and it is easy to cause backflow failure. When using industrial stainless steel one-way water valves and industrial copper one-way water valves, the weight of the system will increase, the cost will increase, and the connection between the pipes will not be tightly sealed, which is prone to leakage. Summary of the Invention

[0003] In order to overcome the defects of the prior art, the problem to be solved by the present invention is to propose a plastic one-way water valve for new energy vehicles, which is small in size, light in weight, simple in structure, easy to assemble, and low in cost. At the same time, it can self-regulate one-way flow without external control, avoiding pipeline blockage and greatly increasing the safety of the refrigerant circuit.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A plastic one-way water valve for new energy vehicles, comprising a plastic valve body, a valve core, and a flow direction indicator, wherein the valve core is fixed inside the plastic valve body;

[0006] The valve core includes a metal valve seat, a metal bushing, a steel ball, and a spring;

[0007] The metal valve seat includes a front valve cylinder and a rear valve cylinder. The cylinder diameter of the rear valve cylinder is smaller than that of the front valve cylinder. The left end of the rear valve cylinder is welded to the right end of the front valve cylinder, and the rear valve cylinder is connected to the front valve cylinder. The interior of the front valve cylinder is processed with an internal thread. The right end of the rear valve cylinder is fixed with a butt ring.

[0008] The spring is horizontally arranged inside the rear valve cylinder, and the right end of the spring abuts against the abutting ring;

[0009] The outer wall of the metal bushing is processed with an external thread, and the thread is threadedly connected to the internal thread of the front valve cylinder;

[0010] A valve seat hole is provided on the right side wall of the metal bushing;

[0011] The steel ball is partially located in the rear valve cylinder, and the steel ball is partially located in the front valve cylinder. The left side of the steel ball abuts against the valve seat hole, and the right side of the steel ball abuts against the left end of the spring.

[0012] The inner wall of the rear valve cylinder is provided with a protrusion for limiting the displacement of the spring, and the protrusion is arranged near the middle of the rear valve cylinder;

[0013] The flow direction indicator is fixed to the outer wall of the plastic valve body;

[0014] The direction of the flow direction mark is consistent with the direction from the front valve cylinder to the rear valve cylinder, and is used to install the water valve according to the flow direction mark.

[0015] Optionally, the orifice of the valve seat hole has a spherical curvature, and the curvature of the curvature is consistent with the curvature of the left end of the steel ball. The spherical curvature of the valve seat hole ensures that when the steel ball is pressed onto the valve seat hole, the steel ball is tightly connected to the valve seat hole.

[0016] Optionally, tapered pier heads are fixed to both end portions of the plastic valve body, and the taper of the pier heads is set in an oblique insertion direction.

[0017] Optionally, the front valve cylinder is pre-embedded and integrally connected with the plastic valve body by injection molding.

[0018] Optionally, the outer wall of the front valve cylinder is threadedly engaged with the inner wall of the plastic valve body.

[0019] Optionally, the outer diameter of the spring is configured to be 2.5 mm to 12 mm, and the outer diameter of the steel ball is configured to be 3 mm to 10 mm.

[0020] Optionally, the plastic valve body is made of any one of polyamide, polyoxymethylene, styrene copolymer, and polypropylene.

[0021] The beneficial effects of the present invention are:

[0022] The present invention provides a plastic one-way water valve for new energy vehicles with a simple structure, low weight, compact size, and low cost. Through the coordination of a steel ball, a metal bushing, and a spring within the valve core, it enables one-way delivery of refrigerant. The steel ball and metal bushing work together to effectively prevent liquid backflow. Furthermore, the device provides tight connections with other components, enhancing the safety of the piping system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of a plastic one-way water valve for new energy vehicles provided by a specific embodiment of the present invention;

[0024] Figure 2This is a cross-sectional view of the internal structure of a plastic one-way water valve for new energy vehicles provided by a specific embodiment of the present invention;

[0025] Figure 3 The invention provides a two-way plastic water valve with a servo motor for a vehicle.

[0026] In the picture:

[0027] 1. Plastic valve body, 2. Front valve cylinder, 21. Rear valve cylinder, 22. Back ring, 23. Bump, 3. Metal bushing, 31. Valve seat hole, 4. Steel ball, 5. Spring, 6. Pier head, 7. Flow direction indicator. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0029] like Figure 1 、 Figure 2As shown, an embodiment provides a plastic one-way water valve for new energy vehicles, including a plastic valve body 1 and a valve core. The plastic valve body 1 is configured as a cylinder, and the valve core is welded to the inner middle part of the plastic valve body 1. The valve core includes a metal valve seat, a metal bushing 3, a steel ball 4, and a spring 5. The metal valve seat includes a front valve cylinder 2 and a rear valve cylinder 21. The cylinder diameter of the rear valve cylinder 21 is smaller than the cylinder diameter of the front valve cylinder 2. The left end of the rear valve cylinder 21 is welded to the right end of the front valve cylinder 2, and the rear valve cylinder 21 is connected to the front valve cylinder 2. A butt ring 22 is fixed to the right end of the inner wall of the rear valve cylinder 21. The spring 5 is horizontally arranged inside the rear valve cylinder 21, and the right end of the spring 5 is against the butt ring 22. The metal bushing 3 is threadedly fixed to the inner wall of the front valve cylinder 2. A valve seat hole 31 is provided on the right side wall of the metal bushing 3. The steel ball 4 is partially located in the rear valve cylinder 21, and partially located in the front valve cylinder 2. The left side of the steel ball 4 abuts against the valve seat hole 31, and the right side of the steel ball 4 abuts against the left end of the spring 5. The metal valve seat can be formed by stamping, or the front valve cylinder 2 and the rear valve cylinder 21 can be connected by welding. An internal thread is machined inside the front valve cylinder 2, and a retaining ring 22 is welded to the rightmost end of the inner wall of the rear valve cylinder 21. When assembling the valve core, the spring 5 is first inserted horizontally through the opening at the left end of the front valve cylinder 2 until the rightmost end of the spring 5 presses against the retaining ring 22. Then, the steel ball 4 is also inserted through the left port of the front valve cylinder 2 until the steel ball 4 presses against the left end of the spring 5. The outer wall of the metal bushing 3 is machined with an external thread. The external thread matches the internal thread of the front valve cylinder 2, so the metal bushing 3 can be screwed into the interior of the front valve cylinder 2, because the valve seat hole 31 is opened on the right side of the metal bushing 3. Therefore, as the metal bushing 3 is screwed into the front valve cylinder 2, it will continuously shift to the right, and eventually the valve seat hole 31 will press against the steel ball 4. At this point, the steel ball 4 will be fixed due to the left-right pressure. The tightness between the steel ball 4 and the spring 5 can also be adjusted by rotating the metal bushing 3 left and right. The tightness of the spring 5 pressing against the steel ball 4 can be adjusted based on the strength of the water flow through the water valve in actual use. In strong water flow, the spring 5 can be pressed tighter, and vice versa in weak water flow. The valve core is now assembled, and then the valve core is fixed to the interior of the plastic valve body 1, completing the assembly of the one-way water valve. The end of the plastic valve body 1 near the front valve cylinder 2 is the input end, and the end near the rear valve cylinder 21 is the output end, which is connected to the refrigerant circuit of the thermal management system or its air conditioning system. Refrigerant enters the input end of the plastic valve body 1 and flows into the metal bushing 3. At this point, a steady stream of refrigerant rushes from the valve seat hole 31 of the metal bushing 3 toward the steel ball 4. The steel ball 4 is pushed by the refrigerant, compressing the spring 5 to the right. At this time, the steel ball 4 and the valve seat hole 31 are separated from the initial contact state, and the refrigerant can flow into the rear valve cylinder 21 from the space between them, and then flow out of the rear valve cylinder 21 and out of the output end of the plastic valve body 1.If the refrigerant reverses flow, the steel ball 4, receiving little or no coolant thrust from the valve seat hole 31, will be pushed to the left by the spring 5, pressing the valve seat hole 31. Simultaneously, the steel ball 4 is also subjected to the pressure of the reverse flow of refrigerant, fitting more tightly against the valve seat hole 31 and achieving a stronger seal, thus preventing the refrigerant from flowing back. Figure 3 The figure shows a conventional plastic water valve for vehicles with a servo motor. This two-way water valve is controlled by an external servo motor to determine whether the valve is on or off. When the valve is connected, the servo motor is controlled to open. When the valve is closed to prevent the refrigerant from flowing back, the servo motor is controlled to close the channel, thereby achieving unidirectional flow and backflow blocking. Compared to this type of plastic water valve for vehicles with a servo motor, the water valve provided in this embodiment has a simple structure, is easy to assemble, and is compact. It can achieve unidirectional flow and backflow blocking without the need for an external motor. Furthermore, the water valve provided in this embodiment has relatively low maintenance and production costs.

[0030] To facilitate identification of the flow direction of the one-way water valve, the plastic one-way water valve for new energy vehicles further includes a flow direction indicator 7. This indicator is affixed to the outer wall of the plastic valve body 1. The direction of the indicator 7 aligns with the direction from the front valve cylinder 2 to the rear valve cylinder 21. Coolant flows from the front valve cylinder 2 to the rear valve cylinder 21 within the water valve, and finally exits. Therefore, the direction of the indicator 7 aligns with this direction, allowing operators to easily install the water valve based on the indicator.

[0031] To ensure a tight fit between the steel ball 4 and the valve seat hole 31, the opening of the valve seat hole 31 further has a spherical curvature, and the curvature of the curvature is consistent with the curvature of the left end of the steel ball 4. The spherical curvature of the valve seat hole 31 ensures that when the steel ball 4 is pressed onto the valve seat hole 31, the steel ball 4 and the valve seat hole 31 are tightly connected, resulting in a better sealing effect and a better backflow prevention effect.

[0032] To prevent spring 5 from shifting, a bump 23 is further provided on the inner wall of rear valve cylinder 21 to limit the displacement of spring 5. This bump 23 is positioned near the middle of rear valve cylinder 21, ensuring a relatively balanced die-cast spring 5 and preventing it from shifting. While the bump 23 holds the spring 5 in place, the inner diameter of rear valve cylinder 21 is larger than that of spring 5. Without the bump 23, spring 5 could potentially shift with steel ball 4 during operation. If steel ball 4 shifts, it could potentially misalign with valve seat hole 31 during backflow prevention, compromising tightness.

[0033] To facilitate connection of the water valve to other pipes in the refrigerant circuit of a thermal management system or air conditioning system, furthermore, tapers 6 are fixed to each end of the plastic valve body 1. There are no specific requirements for the taper, as long as the taper can be easily screwed into other pipes. The tapered tapers 6 make it easier to insert the water valve into other pipes. Furthermore, because the taper of the tapers 6 is set at an angle for insertion, once the water valve is inserted into the pipe, it is unlikely to fall out, ensuring good tightness.

[0034] In one embodiment of the present invention, in order to enhance the integrity of the water valve, the front valve cylinder 2 is further pre-embedded and integrally connected to the plastic valve body 1 by injection molding. After the valve core is assembled, the valve core can be pre-embedded, and the front valve cylinder 2 portion of the valve core contacts the injection mold and is positioned as a pre-embedded part. Then, injection molding is performed on the injection mold to produce the plastic valve body 1. After the plastic valve body 1 is formed, the valve core will be embedded in its inner wall. This makes the water valve more integrated and the sealing between the valve core and the plastic valve body 1 is strong, but it is not so convenient to disassemble the valve core for repair and maintenance.

[0035] In another embodiment of the present invention, in order to facilitate the disassembly and repair of the water valve, the outer surface of the front valve barrel 2 is further threadedly matched with the inner wall of the plastic valve body 1. The outer spiral is pre-processed on the outer wall of the front valve barrel 2, and the inner spiral is processed at a suitable position on the inner wall of the plastic valve body 1. After the valve core is assembled, the front valve barrel 2 part of the valve core can be clamped with a tool and inserted into the interior of the plastic valve body 1, and the two can be rotated to tighten the threads. In this method, since the core body and the plastic valve body 1 are tightened by threads, the two are not as tight as one-piece injection molding, but the valve core can be easily disassembled and installed. This installation method and the above-mentioned one-piece injection molding method can be selected according to actual use needs. The two manufacturing and installation methods do not have much impact on the backflow prevention effect of this water valve.

[0036] To securely hold the steel ball 4, the outer diameter of the steel ball 4 is larger than that of the spring 5. The outer diameter of the spring 5 is set to 2.5 to 12 mm, while the outer diameter of the steel ball 4 is set to 3 to 10 mm. This larger outer diameter ensures that the steel ball 4 is held in place; otherwise, the steel ball 4 will retract into the spring 5, preventing backflow.

[0037] To ensure the water valve's durability, the plastic valve body 1 is further constructed from one of polyamide (PA), polyoxymethylene (POM), ABS (ABS), and polypropylene (PP). Polyamide, commonly known as nylon, is an engineering plastic with high mechanical strength, a high softening point, heat resistance, low friction coefficient, wear resistance, oil resistance, and resistance to weak acids. POM offers high mechanical strength and rigidity, the highest fatigue strength, environmental resistance, and excellent resistance to organic solvents. ABS (ABS) boasts high strength and low weight. Polypropylene (PP) has a low relative density, excellent mechanical properties, high heat resistance, and good chemical properties. Therefore, using these materials to construct the plastic valve body 1 meets the requirements for durability. The metal valve seat, metal bushing 3, and steel ball 4 can be made of stainless steel, iron, aluminum, copper, or other materials, while the spring 5 can be made of iron or stainless steel.

[0038] The present invention is described through preferred embodiments. Those skilled in the art will appreciate that various modifications or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A plastic one-way water valve for new energy vehicles, characterized by: It comprises a plastic valve body (1), a valve core, and a flow direction indicator (7), wherein the valve core is fixed inside the plastic valve body (1); The valve core comprises a metal valve seat, a metal bushing (3), a steel ball (4), and a spring (5); The metal valve seat comprises a front valve cylinder (2) and a rear valve cylinder (21), the cylinder diameter of the rear valve cylinder (21) is smaller than the cylinder diameter of the front valve cylinder (2), the left end of the rear valve cylinder (21) is welded to the right end of the front valve cylinder (2), and the rear valve cylinder (21) is connected to the front valve cylinder (2), the outer wall of the front valve cylinder (2) is threadedly matched with the inner wall of the plastic valve body (1), the interior of the front valve cylinder (2) is processed with an internal thread, and the right end of the rear valve cylinder (21) is fixed with a ring (22); The spring (5) is horizontally arranged inside the rear valve cylinder (21), and the right end of the spring (5) abuts against the abutting ring (22); The outer wall of the metal bushing (3) is processed with an external thread, which is threadedly connected to the internal thread of the front valve cylinder (2). By rotating the metal bushing (3) to move left and right, the tightness between the steel ball (4) and the spring (5) can be adjusted; a valve seat hole (31) is opened on the right side wall of the metal bushing (3); The steel ball (4) is partially located in the rear valve cylinder (21), and the steel ball (4) is partially located in the front valve cylinder (2). The left side of the steel ball (4) abuts against the valve seat hole (31), and the right side of the steel ball (4) abuts against the left end of the spring (5); The inner wall of the rear valve cylinder (21) is provided with a protrusion (23) for limiting the displacement of the spring (5), and the protrusion (23) is arranged near the middle of the rear valve cylinder (21); The flow direction mark (7) is fixed to the outer wall of the plastic valve body (1); the direction of the flow direction mark (7) is consistent with the direction from the front valve cylinder (2) to the rear valve cylinder (21), and is used to install the water valve according to the flow direction mark (7).

2. A plastic one-way water valve for new energy vehicles according to claim 1, characterized in that: The orifice of the valve seat hole (31) has a spherical curvature, and the curvature of the curvature is consistent with the curvature of the left end of the steel ball (4). The spherical curvature of the valve seat hole (31) ensures that when the steel ball (4) is pressed onto the valve seat hole (31), the steel ball (4) is tightly connected to the valve seat hole (31).

3. The plastic one-way water valve for new energy vehicles according to claim 1, characterized in that: A taper pier head (6) is fixed to both end portions of the plastic valve body (1), and the taper of the pier head (6) is set in an oblique insertion direction.

4. The plastic one-way water valve for new energy vehicles according to claim 1, characterized in that: The outer diameter of the spring (5) is configured to be 2.5 mm to 12 mm, and the outer diameter of the steel ball (4) is configured to be 3 mm to 10 mm.

5. The plastic one-way water valve for new energy vehicles according to claim 1, characterized in that: The plastic valve body (1) is made of any one of polyamide, polyoxymethylene, styrene copolymer and polypropylene.

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