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CN-116428647-B - Dehumidifier and control method thereof

CN116428647BCN 116428647 BCN116428647 BCN 116428647BCN-116428647-B

Abstract

The invention provides a dehumidifier and a control method thereof, wherein the dehumidifier comprises a refrigerating system, a water receiving disc, a heating pipe and a regulating valve, the refrigerating system comprises a compressor, a condenser, an evaporator and a fan, the heating pipe is arranged below the water receiving disc, the regulating valve is used for regulating a flow path of a refrigerant and is configured to enable the refrigerant flowing out of the compressor to directly flow into the condenser through a dehumidification branch in the dehumidification process and enable the refrigerant flowing out of the compressor to flow into the heating pipe and then flow into the condenser through a drying branch in the drying process, and the control method comprises the steps of obtaining an internal drying instruction of the dehumidifier, switching the regulating valve to the drying branch, closing the fan and controlling the compressor to independently operate. The invention has the advantages that the problems of internal mildew and bacterial breeding caused by long-time residual condensed water after the dehumidifier is stopped can be solved, the air with peculiar smell is prevented from being blown out of the dehumidifier, and the use experience of a user is improved.

Inventors

  • YANG WEIYU
  • Sui Qiuyu
  • HUANG ZHE
  • Zhao Mengkui

Assignees

  • 青岛海尔空调器有限总公司
  • 青岛海尔空调电子有限公司
  • 青岛海尔智能技术研发有限公司
  • 海尔智家股份有限公司

Dates

Publication Date
20260512
Application Date
20230323

Claims (10)

  1. 1. The control method of the dehumidifier comprises a refrigerating system, a water receiving disc, a heating pipe and a regulating valve, wherein the refrigerating system comprises a compressor, a condenser, an evaporator and a fan, the heating pipe is arranged below the water receiving disc, the regulating valve is used for regulating a flow path of a refrigerant and is configured to enable the refrigerant flowing out of the compressor to directly flow into the condenser through a dehumidification branch in a dehumidification process and enable the refrigerant flowing out of the compressor to firstly flow into the heating pipe through a drying branch and then flow into the condenser in a drying process, and the control method comprises the following steps: Acquiring an internal drying instruction of the dehumidifier; Switching the regulating valve to the drying branch; and closing the fan and controlling the compressor to independently operate.
  2. 2. The control method according to claim 1, wherein a throttle device is provided between the condenser and the evaporator, and after the step of acquiring the internal drying instruction of the dehumidifier, further comprising: the throttling capacity of the throttling device is weakened.
  3. 3. The control method according to claim 1, wherein after the step of controlling the compressor to operate alone, further comprising: judging whether the compressor is in shutdown protection or not; If the compressor is not in shutdown protection, judging whether the running time of the compressor reaches a preset target time; if yes, closing the compressor.
  4. 4. A control method according to claim 3, wherein after the step of turning off the compressor, further comprising: starting the fan and controlling the fan to reversely run; Judging whether the running time of the fan reversal reaches a preset first time; If yes, the fan is turned off.
  5. 5. The control method of claim 4, wherein after the step of judging whether shutdown protection of the compressor occurs, further comprising: if the compressor is in shutdown protection, starting the fan, and controlling the fan to reversely run; Judging whether the running time of the fan reversal reaches a preset second time; If yes, the fan is turned off.
  6. 6. The control method according to claim 5, wherein, The first time is determined according to the ambient humidity when the compressor is stopped; And the second time length is determined according to the actual operation time length of the compressor shutdown and the target time length.
  7. 7. The control method according to claim 4 or 5, wherein after the step of turning off the blower, further comprising: and outputting prompt information for prompting the completion of the drying in the dehumidifier.
  8. 8.A control method according to claim 3, wherein after the step of controlling the compressor to operate alone, further comprising: judging whether the coil temperature of the evaporator is higher than the current dew point temperature, and whether the humidity of the water receiving disc is lower than or equal to the preset target humidity; If yes, closing the compressor; If not, executing the step of judging whether the compressor is in shutdown protection.
  9. 9. A control method according to claim 3, wherein after the step of turning off the compressor, further comprising: starting the fan and controlling the fan to reversely run; judging whether the coil temperature of the evaporator is higher than the current dew point temperature, and whether the humidity of the water receiving disc is lower than or equal to the preset target humidity; If yes, the fan is turned off.
  10. 10. A dehumidifier comprising a controller including a processor and a memory, the memory having stored therein a machine executable program which when executed by the processor is for implementing the method of controlling a dehumidifier of any one of claims 1 to 9.

Description

Dehumidifier and control method thereof Technical Field The invention relates to the technical field of drying and dehumidification, in particular to a dehumidifier and a control method thereof. Background The function of the dehumidifier determines that the humidity of the use environment is generally large, and after the dehumidifier is stopped, the evaporator in a low-temperature state cannot be timely restored to the ambient temperature level, so that the moisture in the air can be continuously condensed on the surface of the dehumidifier, and the condensate water remains on the surface of the water receiving disc. After the dehumidifier is stopped, a user usually only pays attention to the cleaning of condensed water in the water tank, but neglects the drying of the condensed water on the surface of an internal device, and the evaporator and the water receiving disc are sealed in the dehumidifier shell, so that the difficulty of manual cleaning is high, the effect is poor, bacteria can be bred and mildewed taste can be generated due to long-time residual condensed water in a humid environment, and the use health of the user is affected. The existing internal mildew-proof solution of the dehumidifier is to control the operation of a fan and/or control the drying of a heating pipe after the dehumidifier is stopped, and the fan is used for not turning and directly blowing, so that the condensation water quantity on the surface of the evaporator can be increased in the initial stage of the stopping, the drying of water receiving discs at the bottoms of the two evaporators is difficult to consider, the temperature of the condensed water in the water receiving discs is often lower than the ambient temperature, and the quality and the efficiency of the drying are difficult to ensure. The heating pipe is added to improve the drying strategy of the direct blowing air temperature, so that the invalid working time of the heating pipe is overlong due to uneven heating of air, the operation energy consumption is increased, the drying of the water receiving disc is difficult to ensure by the strategy, and in addition, the potential safety hazard can exist by adopting the electric heating strategy in the wet environment inside the dehumidifier. Disclosure of Invention An object of the first aspect of the present invention is to provide a control method of a dehumidifier, which achieves rapid drying of condensed water attached to surfaces of an evaporator and a water receiving tray. A further object of the first aspect of the invention is to improve the drying quality inside the dehumidifier and to save energy. An object of a second aspect of the present invention is to provide a dehumidifier employing the above control method. In particular, according to a first aspect of the present invention, there is provided a control method of a dehumidifier including a refrigerating system including a compressor, a condenser, an evaporator, and a blower, a heating pipe disposed below the water receiving tray, and a regulating valve for regulating a flow path of a refrigerant configured to allow the refrigerant flowing out of the compressor to directly flow into the condenser through a dehumidification branch during dehumidification and to allow the refrigerant flowing out of the compressor to flow into the heating pipe through a drying branch before flowing into the condenser during drying, the control method comprising: acquiring an internal drying instruction of the dehumidifier; Switching the regulating valve to the drying branch; And closing the fan and controlling the compressor to independently operate. Optionally, a throttling device is disposed between the condenser and the evaporator, and after the step of obtaining the internal drying instruction of the dehumidifier, the method further comprises: the throttle capability of the throttle device is weakened. Optionally, after the step of controlling the compressor to operate alone, further comprising: judging whether the compressor is in shutdown protection or not; if the compressor is not in shutdown protection, judging whether the running time of the compressor reaches a preset target time; If so, the compressor is turned off. Optionally, after the step of turning off the compressor, further comprising: Starting a fan, and controlling the fan to reversely run; judging whether the running time of the fan reversal reaches a preset first time; If so, the fan is turned off. Optionally, after the step of determining whether shutdown protection of the compressor occurs, the method further includes: if the compressor is in shutdown protection, starting a fan, and controlling the fan to reversely run; judging whether the running time of the fan reversal reaches a preset second time; If so, the fan is turned off. Optionally, the first time period is determined based on an ambient humidity at which the compressor is shut down; The second time period is determined according to th