Dyer and device for detecting working state of draught fan of dryer and dryer

Abstract

The invention discloses a dryer and a device for detecting a working state of a draught fan of the dryer. The device comprises a guide pipe and a pressure sensing device, wherein pressure sensing device is arranged at the outer part of a drying oven of the dryer; and one end of the guide pipe is communicated to an air outlet end of the draught fan in the drying oven while the other end of the guide pipe is connected to the pressure sensing device. The device for detecting the working state of the draught fan of the dryer has the advantages of being simple in structure, convenient to manufacture, and convenient to assemble, disassemble, debug as well as maintain. The dryer is provided with the device for detecting the working state of the draught fan of the dryer.

Description

technical field [0001] The invention relates to food and pharmaceutical packaging machinery, in particular to a device and a dryer for detecting the working state of a blower fan of the dryer. Background technique [0002] The existing device used to detect the working state of the dryer fan is a mechanical damper sensing device, and its structure is as follows: figure 1 As shown, the device is composed of a proximity switch 12, a damper 13, a connecting rod 14, an induction plate 15, a counterweight 16, an indicator needle 17, and the like. The dryer is provided with a volute 6 at the air outlet end of the fan 1, and the damper 13 is placed at the outlet of the volute 6, and the damper 13 is connected to the induction plate 15, the counterweight 16 and the indicator needle 17 through the connecting rod 14, and the proximity switch 12 It is fixed on the outer wall of the oven 11 of the dryer. When the blower fan 1 was working, the damper 13 drove the connecting rod 14 unde...

AI Technical Summary

Problems solved by technology

[0003] The existing mechanical air door sensing device has the following problems: 1. It is inconvenient to manufacture, disassemble, debug and maintain; 2. It affects the size of the air volume and the uniformity of the wind; 3. The mechanical structure will produce particles during operation, which will affect The quality and life of the filter; 4. The mechanical structure is unstable and prone to failure. It is impossible to confirm whether the fan is running normally. Once the fan fails and is not dealt with in time, it will seriously affect the sterilization effect and fail to meet the sterilization requirements. As a result, all the products in this batch are unqualified; in addition, if the fan cannot operate normally, the gas in the oven is in a static state. At this time, the heating tube is in a "dry burning" working state, which may easily cause the heating tube to burn out.

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