Dynamic descaling control method of heat pump hot water unit
A heat pump hot water and control method technology, applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems affecting the normal operation of heat pump units, high cost of descaling, waste water and other problems, to avoid incomplete descaling, The effect of high degree of automation and material cost saving
Active Publication Date: 2020-04-03
QINGDAO HAIER NEW ENERGY ELECTRIC APPLIANCE +2
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Problems solved by technology
[0004] The present invention aims at the technical problems in the prior art that the descaling control of the heat pump hot water unit affects the normal operation of the heat pump unit, and requires a special descaling agent, the operation of the descaling method is inconvenient, and the waste water waste results in high cost of descaling. A dynamic scaling control method for heat pump hot water units can solve the above problems
Method used
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Embodiment 1
[0047] Embodiment 1. This embodiment proposes a dynamic scaling control method for heat pump water heating units. This scaling control method occurs during the normal heating operation of heat pump water heating units. Heat pump water heating units such as figure 1 As shown, it includes a water circulation system and a refrigerant circulation system. The water circulation system includes a water tank 11 and a water pump 12. The refrigerant circulation system includes a compressor 21, a four-way valve 22 for controlling the direction of refrigerant flow, a heat exchanger 23, etc. During normal operation , the compressor 21 presses the high-temperature refrigerant into the heat exchanger 23, and at the same time, the water pump 12 circulates the water in the water tank 11 to the heat exchanger 23. In the heat exchanger 23, the refrigerant releases heat, and the water absorbs heat, completing the heating of the water. Recirculate in the water tank 11 until the overall temperature ...
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The invention discloses a dynamic descaling control method of a heat pump hot water unit. The method comprises the following steps of scale restraining entering condition judgment, wherein when it isjudged that the scale restraining conditions are met is judged, the scale restraining control step is executed, and the scale restraining control step comprises four-way valve reversing, changing of the refrigerant circulating direction, adjusting of an electronic expansion valve to the target opening degree and adjusting of a water pump to the target rotating speed; and scale restraining retreating condition judgment, wherein when it is judged that the scale restraining retreating conditions are met, operation retreats from the scale restraining control step. The dynamic descaling control method of a heat pump hot water unit can run through the whole running process of the heat pump hot water unit, when conditions are met, operation automatically enters or retreats from the scale restraining control step, manual intervention is not needed, the automation degree of a system is high, and normal running of the heat pump unit is not influenced. No any descaling agent needs to be additionally added, and the material cost is saved.
Description
technical field [0001] The invention belongs to the technical field of hot water equipment, and in particular relates to a dynamic descaling control method for a heat pump hot water unit. Background technique [0002] During the long-term heating operation of the heat pump water heater unit, a large amount of scaling will occur on the casing heat exchanger. Excessive accumulation of scale will reduce the heat transfer effect of the condenser (such as the casing heat exchanger) and increase the load on the compressor. The heating efficiency is greatly reduced. [0003] Almost none of the existing heat pump water heaters has an effective method to prevent the scaling of the condensing heat exchanger; when the scaling is serious, the commonly used descaling method is to suspend the operation of the hot water machine, and add appropriate amount of water to the water tank after the water tank is drained. If the concentration of descaling agent (usually weak acid solution), turn ...
Claims
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IPC IPC(8): F24H4/02F24H9/00F24H9/20F25B47/00
CPCF24H4/02F24H9/0042F24H9/2007F25B47/00
Inventor 杨磊徐洪浩魏爱国黄娟
Owner QINGDAO HAIER NEW ENERGY ELECTRIC APPLIANCE