Rotary knob speed regulation switch and automobile fan heater having the same

Abstract

The invention discloses a rotary knob speed regulation switch, which includes a plurality of arc-shaped static contact pieces arranged on a pedestal at intervals, a moving contact plate arranged abovethe pedestal and an operating mechanism driving the moving contact plate to rotate so that a moving contact on the moving contact plate contacts with the plurality of static contact pieces in sequence, and also includes an elastic contact piece having a first end fixed to the moving contact plate and a second end which always maintains contact with any one of two adjacent static contact pieces when the moving contact moves to an interval between the two adjacent static contact pieces in a rotation process of the moving contact plate. The invention also discloses an automobile fan heater having the abovementioned rotary knob speed regulation switch. The scheme of the invention ensures that the moving contact plate first contacts with the next gear and then disconnects with the previous gear in a motion process of gear switching of the moving contact plate, thereby avoiding occurrence of a gear interruption phenomenon during gear switching; and a phenomenon that a current suddenly increases and excess load and electric sparks are generated and causing product failure and burning during shifting-up, the safety is good, and the service life of a product is prolonged.

Description

technical field [0001] The invention relates to the technical field of automobile heaters, in particular to a knob speed regulating switch and an automobile heater equipped with the same. Background technique [0002] The car heater is a device that sends air into a heat exchanger to absorb heat from a certain heat source, thereby increasing the temperature of the air and sending hot air into the car. It is a part of the car air conditioning control system and can realize heating. , defrosting, adjusting temperature and humidity and other functions. [0003] The air volume adjustment of the existing automobile heater is realized through the control of the speed regulating switch on it. The traditional speed regulating switch adopts a lever type mechanical structure. Although the structure of the regulating switch in this structure is relatively simple, it is inconvenient to operate and the control Inaccurate, uncomfortable and other issues. Thereby, most of the existing sp...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the phenomenon that the heater speed regulating switch in the prior art is out of gear and has no wind when shifting gears, and the sudden increase of current is easy to generate electric sparks, which break down the copper sheet and the plastic shell, Cause the switch to fail, there is a problem of potential safety hazards

Images