Differential pressure switch with multi-gear regulating function and water chilling unit
A differential pressure switch and differential pressure technology, which is applied in the field of differential pressure switches and water chillers, can solve the problems of different types of differential pressure switches and cannot be used universally, and achieve the effect of improving versatility
Pending Publication Date: 2019-11-26
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0004] The invention discloses a differential pressure switch and a water chiller with multi-level adjustment functions, which solves the problem that the differential pressure switches of different units have different models and cannot be used universally
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[0019] The present invention will be further described below in conjunction with embodiment, but is not limited to the content on the description.
[0020] Such as figure 1 with figure 2 As shown, the present invention discloses a differential pressure switch, comprising: a housing 11, a valve core 12, an elastic member 13 and an adjustment device 14, the housing 11 has an accommodation chamber; the valve core 12 is movably arranged in the accommodation chamber, The spool 12 divides the chamber into a first pressure chamber 111 and a second pressure chamber 112, the spool 12 has an initial position and an open position; the elastic member 13 is arranged in the first pressure chamber 111, and the first end of the elastic member 13 is arranged on On the valve core 12, the second end of the elastic member 13 is arranged on the inner wall of the first pressure chamber 111, and the elastic member 13 is used to apply a pre-action force to the valve core 12; between the first press...
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The invention discloses a differential pressure switch with a multi-gear regulating function and a water chilling unit. The differential pressure switch comprises a shell provided with an accommodating cavity; a valve element that is movably arranged in the accommodating cavity, and divides the accommodating cavity into a first pressure cavity and a second pressure cavity; an elastic piece arranged in the first pressure cavity, wherein the first end of the elastic piece is arranged on the valve element, the second end of the elastic piece is arranged on the inner wall of the first pressure cavity, and under the effect of differential pressure, the valve element is displaced and triggers the differential pressure switch to open or close; and a regulating device connected with the valve element, and used for regulating the initial position of the valve element. According to the differential pressure switch, through arranging the regulating device, and arranging the elastic piece in the first pressure cavity, the differential pressure value needed for triggering the differential pressure switch to open can be changed according to actual requirements, and universality of the differential pressure switch can be improved.
Description
technical field [0001] The invention relates to the technical field of water chillers, in particular to a differential pressure switch with multi-level adjustment functions and a water chiller. Background technique [0002] At present, large-scale chillers are generally equipped with a differential pressure switch, and the main board of the unit judges whether the water flow of the unit is abnormal by collecting the on-off signal of the differential pressure switch. The specific working principle is: under normal circumstances, the water flow of the unit is greater than the preset flow, so the corresponding water pressure value is also greater than the preset pressure value of the differential pressure switch. The electrical signal can be exported to let the staff know that the water flow of the unit is normal; when the water flow of the unit is lower than the preset flow rate, and the corresponding water pressure value is also lower than the preset pressure value of the dif...
Claims
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IPC IPC(8): H01H35/26H01H35/30
CPCH01H35/26H01H35/30
Inventor 张治平王亚飞龙忠铿罗炽亮张丙
Owner GREE ELECTRIC APPLIANCES INC