Antifreeze control device for heat pump unit, heat pump unit and antifreeze control method thereof

Abstract

The invention discloses an anti-freezing control device of a heat pump unit, the heat pump unit and an anti-freezing control method of the heat pump unit. The device comprises a bypass header pipe, adirect heating bypass branch pipe, a circulation bypass branch pipe, a first anti-freezing electromagnetic valve and a second anti-freezing electromagnetic valve. A water drainage pipe of the heat pump unit is divided into two paths through the bypass header pipe, the first path is connected to a direct heating water inlet pipe of the heat pump unit through the direct heating bypass branch pipe, the second path is connected to a circulation water inlet pipe of the heat pump unit through the circulation bypass branch pipe, the first anti-freezing electromagnetic valve is arranged on the directheating bypass branch pipe and used for controlling one part of hot water in the water drainage pipe to flow into the direct heating water inlet pipe through the direct heating bypass branch pipe, andtherefore anti-freezing control over the direct heating water inlet pipe is achieved. The second anti-freezing electromagnetic valve is arranged on the circulation bypass branch pipe and used for controlling one part of hot water in the water drainage pipe to flow into the circulation water inlet pipe through the circulation bypass branch pipe, and therefore anti-freezing control over the circulation water inlet pipe is achieved. By means of the scheme, the problem that the anti-freezing effect is poor since a pipeline and heat belt laying way is adopted for carrying out anti-freezing treatment in the prior art is solved, and the anti-freezing effect is improved.

Description

technical field [0001] The invention belongs to the technical field of heat pumps, and in particular relates to an antifreeze control device for a heat pump unit, a heat pump unit and an antifreeze control method thereof, in particular to an automatic antifreeze control device for an inlet pipe of a direct heat cycle heat pump unit, and a heat pump unit with the device , and the antifreeze control method of the heat pump unit. Background technique [0002] With the rise of coal-to-electricity conversion in the north, heat pump water heaters have gradually become the darling of the market, and the scope of application is gradually expanding. The antifreeze of the unit has always been the pain point of the heat pump unit, including the antifreeze of the water side heat exchanger, antifreeze of pipeline valves, Antifreeze for drain pipes, etc. The commercial direct heating circulating water heater has the advantage of quickly producing hot water. The tap water enters the unit ...

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Problems solved by technology

[0004] The object of the present invention is to address the above defects, to provide an antifreeze control device for a heat pump unit, a heat pump unit and its antifreeze control method, so as to solve the problem of poor antifreeze effect on pipelines in the prior art by laying heating cables for pipelines. problems, to achieve the effect of improving the antifreeze effect

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