A solenoid valve resistant to low-temperature freezing and cracking

Abstract

This utility model relates to a solenoid valve for preventing low-temperature freezing and cracking, comprising a valve body with an inlet pipe and two outlet pipes. The two outlet pipes are located behind the inlet pipe. Two chambers are located on the top of the valve body. The top of the inlet pipe passes through one of the two chambers. Each outlet pipe enters one of the chambers through a transverse pipe, the end of which is equipped with a valve plate. A sealing cap is located at one end of the valve body, sealing the chamber. A spring is installed in each chamber, with its two ends contacting the valve plate and the sealing cap, respectively. This solenoid valve, with its inlet and outlet pipes arranged front-to-back, avoids transverse channels, allowing the valve body to be integrally molded without the need for a tee fitting. Furthermore, this front-to-back arrangement reduces the transverse dimensions of the valve body, making it suitable for applications with size constraints.

Description

Technical Field

[0001] This utility model relates to an electromagnetic valve that is resistant to low-temperature freezing and cracking. Background Technology

[0002] Currently, due to limitations in users' home conditions, many washing machines are placed on balconies. However, in winter, some areas experience extremely low temperatures. At this time, the solenoid valve is prone to cracking due to water freezing and the valve body being unable to withstand the expansion force. If the water inlet valve cracks, water leakage will occur when the ice thaws, potentially causing flooding in the user's home, resulting in economic losses and damaging the brand reputation of the machine manufacturer. Summary of the Invention

[0003] The present invention addresses the problems in the prior art by designing a solenoid valve that is resistant to low-temperature freezing and cracking, which can prevent the valve body from freezing and cracking at low temperatures.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a solenoid valve for preventing low-temperature freezing and cracking, comprising a valve body, wherein a chamber is provided within the valve body, and an inlet and an outlet communicating with the chamber are provided on the valve body, the inlet and the outlet being separated by a valve, characterized in that: it further includes a channel communicating with the chamber, a piston is provided within the channel, the piston and the channel form a seal, and a first spring is also provided within the channel. Under the action of the first spring, the piston blocks the entrance of the channel, and the force exerted by the first spring on the piston in the initial state is greater than the force exerted on the piston by the piston under the maximum water pressure in the chamber. When the temperature drops below the freezing point, the water in the chamber freezes, and the volume increases after freezing, pushing the piston to move, allowing the water in the chamber to flow into the channel. The increased volume of the water during freezing also has a place to go, thus preventing the valve body from cracking due to the volume expansion of the water after freezing.

[0005] In the above technical solution, preferably, the outer ring of the piston is provided with a sealing ring, and the sealing ring is in close contact with the inner wall of the channel. The function of the sealing ring is to increase the sealing performance of the piston and prevent water from entering the channel during normal use.

[0006] In the above technical solution, preferably, a protective cover is provided at the end of the channel, a guide hole is provided on the protective cover, a guide rod is provided on the piston, and the guide rod cooperates with the guide hole.

[0007] In the above technical solution, preferably, a filter is provided inside the water inlet.

[0008] In the above technical solution, preferably, the valve includes a rubber core, an iron core, a second spring, and a plastic seal. A slide rail is provided within the plastic seal. The iron core is slidably connected within the slide rail. The rubber core is fixed within one end of the iron core extending from the channel. The second spring pushes the iron core outward, and the rubber core seals the outlet. In a preferred embodiment of this utility model, one end of the electromagnetic control mechanism is inserted into the cavity, and the portion of the electromagnetic control mechanism inserted into the cavity seals against the inner wall of the cavity.

[0009] Compared with existing technologies, the advantages of this invention are as follows: the inlet and outlet pipes are arranged front and back, avoiding the presence of transverse channels, thus allowing the valve body to be directly integrally molded without the need for a tee fitting. Furthermore, this front-back arrangement also reduces the transverse dimensions of the valve body, making it suitable for applications with size limitations. Attached Figure Description

[0010] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0011] Figure 2 This is a schematic diagram of one side of the present invention.

[0012] Figure 3 for Figure 2 A cross-sectional view along AA.

[0013] Figure 4 for Figure 2 A cross-sectional view along BB.

[0014] In the diagram: 1. Valve body, 11. Chamber, 12. Inlet, 13. Outlet, 1a. Filter, 14. Channel, 15. Cover, 16. Guide hole, 2. Valve, 21. Rubber core, 22. Iron core, 23. Second spring, 24. Plastic seal, 2a. Slide, 3. Piston, 31. Sealing ring, 32. Guide rod, 33. First spring. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Please see Figure 1-4 This utility model provides a technical solution: a solenoid valve for preventing low-temperature freezing and cracking, including a valve body 1, a chamber 11 is provided inside the valve body 1, an inlet 12 and an outlet 13 communicating with the chamber 11 are provided on the valve body 1, the inlet 12 and the outlet 13 are separated by a valve 2, and a filter 1a is provided inside the inlet.

[0018] The valve 2 includes a rubber core 21, an iron core 22, a second spring 23, and a plastic seal 24. A slide 2a is provided inside the plastic seal 24. The iron core 22 is slidably connected in the slide 2a. The rubber core 21 is fixed in one end of the iron core 22 that extends out of the channel 2a. The second spring 23 pushes the iron core 22 to move outward. The rubber core 21 seals the outlet 13.

[0019] It also includes a channel 14 communicating with the chamber 11. A piston 3 is disposed within the channel 14, and the piston 3 forms a seal with the channel 14. A sealing ring 31 is disposed on the outer ring of the piston 3, and the sealing ring 31 is in close contact with the inner wall of the channel 14. The function of the sealing ring is to increase the sealing performance of the piston and prevent water from entering the channel during normal use.

[0020] A first spring 33 is also provided in the channel 14. Under the action of the first spring 33, the piston 3 blocks the entrance of the channel 14. The force exerted by the first spring 33 on the piston 3 in the initial state is greater than the force exerted on the piston 3 under the maximum water pressure in the chamber 11.

[0021] A cover 15 is provided at the end of the channel 14, and a guide hole 151 is provided on the cover 15. A guide rod 32 is provided on the piston 3, and the guide rod 32 cooperates with the guide hole 151. When the temperature drops below the freezing point, the water in the chamber freezes. After freezing, the volume increases, which pushes the piston to move, and the water in the chamber flows into the channel. The part of the water that increases in volume during freezing also has a place to go, which can prevent the valve body from cracking due to the volume expansion of the water after freezing.

Claims

1. A low-temperature freeze-proofing solenoid valve comprising a valve body, a chamber being provided in the valve body, a water inlet and a water outlet being provided on the valve body and communicating with the chamber, the water inlet and the water outlet being separated by a valve, characterized in that: It also includes a channel communicating with the chamber, a piston is provided in the channel, the piston and the channel form a seal, and a first spring is also provided in the channel. Under the action of the first spring, the piston blocks the entrance of the channel.

2. The low-temperature freeze cracking preventive solenoid valve according to claim 1, characterized by: The piston has a sealing ring on its outer ring, and the sealing ring is in close contact with the inner wall of the channel.

3. The low-temperature freeze fracture prevention solenoid valve according to claim 2, characterized by: The end of the channel is provided with a protective cover, the protective cover is provided with a guide hole, and the piston is provided with a guide rod, the guide rod cooperating with the guide hole.

4. The low-temperature freeze fracture prevention solenoid valve according to claim 1, characterized by: A filter is installed inside the water inlet.

5. The low-temperature freeze fracture prevention solenoid valve according to claim 1, characterized by: The valve includes a rubber core, an iron core, a second spring, and a plastic seal. A slide is provided in the plastic seal. The iron core is slidably connected in the slide. The rubber core is fixed in the end of the iron core that extends out of the channel. The second spring pushes the iron core to move outward. The rubber core seals the water outlet.

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