Air source heat pump dryer with auxiliary electric heater and control method of air source heat pump dryer

Abstract

The invention discloses an air source heat pump dryer with an auxiliary electric heater and a control method of the air source heat pump dryer. The method comprises the following steps: judging whether an outdoor unit of the dryer is in a fault shutdown state or a normal operation state; if the outdoor unit is in the failure shutdown state, starting the auxiliary electric heater corresponding to the failure shutdown outdoor unit for drying; if the outdoor unit is in the normal running state, judging whether the continuous running time of a compressor of the normally running outdoor unit reaches the set time or not; if the set time is not up, controlling the compressor of the normally running outdoor unit to continue to run, and keeping the auxiliary electric heater corresponding to the normally running outdoor unit in a closed state; and if the set time is up, controlling the compressor of the normally running outdoor unit to continue to operate, and starting the auxiliary electric heater corresponding to the normally running outdoor unit. By applying the air source heat pump dryer, the drying efficiency of the dryer can be improved, and the power consumption generated by frequently starting and stopping the auxiliary electric heater is reduced.

Description

technical field [0001] The invention belongs to the technical field of heat pump dryers, and in particular relates to an air source heat pump dryer with an auxiliary electric heater and a control method thereof. Background technique [0002] Most of the existing air source heat pump dryers are equipped with auxiliary electric heaters, which are used as compensation for the heating capacity of the refrigerant circulation system of the dryer under certain circumstances, so as to improve the overall heating capacity of the dryer. [0003] The auxiliary electric heater in the existing air source heat pump dryer with an auxiliary electric heater is fuzzy controlled simply according to the temperature of the drying environment, and the control is not precise enough, which makes the auxiliary electric heater start and stop frequently and increase power consumption , Increased drying energy consumption and cost. In addition, in the prior art, if the dryer equipment breaks down, the...

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Problems solved by technology

[0003]The auxiliary electric heater in the existing air source heat pump dryer with auxiliary electric heater is only fuzzy controlled according to the temperature of the drying environment, and the control is not accurate enough , so that the auxiliary electric heater starts and stops frequently, and the power consumption increases, which increases the drying energy consumption and cost

In addition, in the prior art, if the dryer equipment breaks down, the whole dryer will be locked and will no longer be started, and its auxiliary electric heater will not be able to operate, which will affect the normal operation of the drying, and the drying reliability will be low, reducing the drying efficiency

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