Tumble dryer self-diagnosis method

Abstract

The invention discloses a fault self-detection method of a roller dryer. The method comprises the following steps: before a drying process is carried out, firstly, switching on low-power heating wires of a heater, and judging whether an air channel is clogged or not by monitoring whether a thermostat is switched off or not; if the thermostat is not switched off within a set time t, executing the next detection, and if the thermostat is switched off within the set time t, stopping working and giving an alarm; judging whether the heater works normally or not according to whether the temperature range limit delta T measured by a temperature sensor within the set time t is less than the set value T or not; and if the temperature range limit delta T is greater than the set value T, carrying out the drying process, and if the temperature range limit delta T is not greater than the set value T, stopping working and giving an alarm. By adopting the detection method of the invention, the fault diagnosis can be finished within 10-15min after the roller dryer is started, thereby early giving a prompt by the early diagnosis, saving the time and reducing the energy loss caused by the lagged discovery of faults. The method can be used without changing the machine structure, and the method is suitable for various dryers with temperature detecting and temperature limiting devices.

Description

technical field [0001] The invention relates to a fault detection method for a clothes dryer, in particular to a fault self-diagnosis method for a tumble dryer. Background technique [0002] Existing electric heating dryers are generally divided into two categories: inline type and condensation type. In the direct discharge machine, the hot air is blown into the cylinder, passes through the clothes and directly enters the exhaust pipe, and is exhausted to the outside. The condensing type machine is that the internal air circulates in the drum and the air duct. First, after the clothes to be dried are placed in the drum, the warm air generated when the heater is heated is supplied to the drum, and the warm air supplied in this way contacts the clothes on the drum. Drying clothes. At this time, the high-temperature and humid air generated by drying clothes first passes through the lint filter to remove foreign substances in the air, and then enters the air duct through the tu...

AI Technical Summary

Problems solved by technology

[0004] Some foreign substances are blocked by the filter during each cycle. However, if the dryer has been used for a long time, a large amount of foreign substances will accumulate on the filter body, which will block the air passage and reduce the air volume passing through the heater. Small, the heat generated by the heater cannot be dissipated in time, causing the temperature of the air flowing through the thermostat to be too high, until it reaches the set temperature of the thermostat or thermostat, and the work stops.

In addition, because the heater is easily damaged after long-term use, the problem of how to detect whether the air passage is blocked and whether the heater is working normally has always been a problem that the dryer needs to solve

[0008] The above technologies are all through fault detection during the drying process. It takes a period of time for the program to run to determine the existence and type of the fault. Some even generate an alarm when the drying effect is not reached after the program ends. , the judgment cycle of these methods is too long, wastes time, causes unnecessary energy consumption, and brings inconvenience to users

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