Heat pump unit with defrosting function and its control method
A technology of a heat pump unit and a control method, which is applied to compressors with reversible cycles, refrigerators, compressors, etc., can solve problems such as the difficulty of melting ice layers, achieve the goals of reducing operating power, improving refrigeration efficiency, and increasing defrosting efficiency Effect
Active Publication Date: 2021-06-01
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
[0003] In order to solve the technical problem that the ice layer at the bottom of the indoor heat exchanger of the heat pump unit in the prior art is difficult to melt, a method is provided that utilizes the waste heat of condensation to keep heating the defrosting pipeline during the refrigeration process so as to avoid the generation of ice layer and Accumulated heat pump unit with defrosting function and its control method
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[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0050] Such as figure 1 The shown heat pump unit includes an indoor heat exchanger 1 and a defrosting pipeline 2, the defrosting pipeline 2 is arranged below the indoor heat exchanger 1, and the defrosting pipeline 2 can control the indoor heat exchanger 1 The bottom of the indoor heat exchanger 1 is heated, so as to avoid the ice layer under the indoor heat exchanger 1 or defrost the bottom of the indoor heat exchanger 1. In particular, a chassis is arranged under the indoor heat On the chassis, it can also avoid the problem that the water cannot be discharged due to ice on the chassis. The heat ...
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The invention provides a heat pump unit with a defrosting function and a control method thereof. The heat pump unit includes a first outdoor heat exchanger and a second outdoor heat exchanger arranged in parallel, the first outdoor heat exchanger communicates with one end of the indoor heat exchanger, and the first end of the defrosting pipeline communicates with The pipeline between the first outdoor heat exchanger and the indoor heat exchanger is connected. In the heat pump unit with defrosting function and its control method provided by the present invention, a second outdoor heat exchanger is added. In the cooling and defrosting mode, the defrosting pipeline is always heated by the condensation waste heat of the second outdoor heat exchanger. In this way, the generation and accumulation of ice layers can be avoided, and the refrigerant can be further overcooled to improve the cooling efficiency. In the heating and defrosting mode, the defrosting efficiency of the refrigerant in the defrosting pipeline can be increased, and the first one can be switched as needed. The operating status of the outdoor heat exchanger and the second outdoor heat exchanger can effectively reduce the operating power of the compressor and save more energy.
Description
technical field [0001] The invention relates to the technical field of air treatment equipment, in particular to a heat pump unit with a defrosting function and a control method thereof. Background technique [0002] When the heat pump unit is operating at a low ambient temperature (such as a cold storage), the bottom of the indoor heat exchanger is prone to freezing. Conventional heat pump units generally rely on the high-temperature and high-pressure steam discharged from the compressor to directly discharge into the cooling fan’s fins when defrosting. The frost layer on the sheet melts, and the heat transfer method of heat conduction and heat convection mainly depends on the temperature difference for heat exchange. The effect of defrosting the frost layer on the fins is better, but for the ice layer on the chassis, it is mainly based on heat radiation. The higher the temperature, the better the effect of thermal radiation. Due to the limitation of the exhaust temperature...
Claims
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IPC IPC(8): F25B47/02F25B13/00F25B41/42F25B49/02F25B41/20F25B41/30
CPCF25B13/00F25B41/00F25B47/02F25B49/02
Inventor 解金辉姚书荣
Owner GREE ELECTRIC APPLIANCES INC