Hydraulic control device

Abstract

The invention discloses a hydraulic control device. The device comprises a shell, the shell comprises an upper shell body and a lower shell body, the lower shell body is provided with a sleeve section sleeved with the upper shell body, a water inlet is formed in the lower shell body, a water outlet is formed in the upper shell body, a water inlet channel connected with the water inlet is arranged in the sleeve section, and a water backflow prevention mechanism is arranged in the shell. The water backflow prevention mechanism comprises a sealing pad between the sleeve section and the upper shell body, and a return spring abutting between the sealing pad and the upper shell body. The sealing pad is provided with a water backflow prevention position driven by the return spring and covering the end face of the sleeve section, and a water passing position driven by water flow in the water inlet channel and separated from the end face of the sleeve section. The hydraulic control device can effectively prevent the action of water backflow.

Description

technical field [0001] The invention belongs to the technical field of valves, and in particular relates to a hydraulic control device. Background technique [0002] In existing home appliances such as washing machines, dishwashers, and smart toilets, water valves are needed to control the inflow and outflow of water bodies and the flow rate of water bodies. Since water pressure varies greatly in different regions, and in some regions There is unstable water pressure. When there is no water pressure, the water pressure is unstable, or the water inlet pressure drops sharply, a negative pressure will be generated at the water inlet and outlet of the household appliance. A siphon phenomenon is generated, causing the water in the home appliance to flow back, and the backflowing water will pollute the water resources at the water inlet. And when the pressure of the water body suddenly increases sometimes, if it is not properly controlled, it will also cause an overshoot effect,...

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Problems solved by technology

[0002] In existing home appliances such as washing machines, dishwashers, and smart toilets, water valves are needed to control the inflow and outflow of water bodies and the flow rate of water bodies. Since water pressure varies greatly in different regions, and in some regions There is unstable water pressure

When there is no water pressure, the water pressure is unstable, or the water inlet pressure drops sharply, a negative pressure will be generated at the water inlet and outlet of the household appliance. A siphon phenomenon is generated, causing the water in the home appliance to flow back, and the returned water will pollute the water resources at the water inlet

And when the pressure of the water body suddenly increases sometimes, if it is not properly controlled, it will also cause an overshoot effect, which will damage the home appliances.

[0003] In the prior art, although there are different technical solutions to solve the problems of overshoot prevention and water backflow prevention, the existing technical solutions are not effective, the structure is relatively cumbersome, they do not have universal applicability, and they are costly and poor in versatility , manufacturing troubles, complex product structure, and complex assembly process, so in the prior art, it is still impossible to effectively solve the problems of preventing water overflushing and preventing water backflow in existing household appliances such as washing machines, dishwashers, and smart toilets.

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