Pressure switch
A pressure switch and switch seat technology, applied in the direction of electric switches, electrical components, circuits, etc., can solve the problems of large pressure switch, poor product performance consistency, small deformation, etc., to facilitate assembly and debugging, reduce product cost, The effect of preventing changes
Inactive Publication Date: 2007-02-07
宁波市塞纳电热电器有限公司
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Problems solved by technology
[0003] The pressure switch used in the household miniature boiler steam generating device is a very important control element, so the requirements for the bellows and diaphragm are very high. Generally, precious metals such as beryllium bronze and stainless steel are used, and the processing requirements are also very high, resulting in the failure of the pressure switch. higher cost
For metal bellows or diaphragms, the linear area of pressure deformation is very narrow, the amount of deformation is small, the product performance consistency is poor, and debugging is also difficult. In practice, it is necessary to choose a larger diameter bellows or diaphragm, so the pressure switch larger size
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[0021] Example: The pressure switch used for the steam generating device of the household micro-boiler is generally set at a switch action pressure value of 0.4MPa, the external thread of the joint is R1 / 8, the sealing diaphragm is circular, the pressure diameter is 9mm, and the pressure is 25.4N , Set the displacement of the ejector rod to 0.8mm when the switch is in action, the free length of the spring to 9.5mm, the assembly length to 7.5mm, and the stiffness of the spring to 9.1N / mm, select a finalized micro switch.
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The invention relates to a pressure switch used in over-pressure protection of family micro boiler steam generator, wherein it is formed by connector 1, sealing membrane 2, top rod 3, spring 4, frame 5, switch base 6, and micro switch 7; as picture 1, the connector 1 connects the pressure switch and the steam generator, as well as the mounting base of sealing membrane 2; the frame 5 mounts the membrane 2 and the top rod 3 inside the connector 1; the frame 5 mounts the switch base 6 after mounting the spring 4 and the pad 9, to form pressure sensor; the pressure volume is converted into the displacement of top rod 3, to push the trigger 10 of micro switch 7 mounted on the switch base 6; via adjusting the screw dept of switch base 6 in the frame 5, setting the operation point of pressure switch; then adhering the switch base 6 and the frame 5 with sealing rubber. Said invention uses rubber sealing membrane to replace the metal membrane, to realize lower cost and micro volume.
Description
Technical field: [0001] The invention relates to a new type of pressure switch, which is mainly used for the overpressure protection of the steam generating device of the domestic miniature boiler. When the pressure in the steam generating device exceeds the action value set by the pressure switch, the contact of the pressure switch will Disconnect, cut off the power supply of the heating element of the steam generating device to protect the steam generating device. Background technique: [0002] According to different use occasions, pressure switches have various corresponding structures and types, and some pressure switches have other combined functions, but the simple structure of pressure switches can be divided into parts that feel pressure and parts that switch. As a specific product, auxiliary parts such as housings, sealing parts, and adjustment parts are also required. The pressure switch used for household miniature boiler steam generating device has a working pre...
Claims
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IPC IPC(8): H01H35/24
Inventor 林建江
Owner 宁波市塞纳电热电器有限公司
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