Distributed defrosting heat pump system

Abstract

The invention discloses a distributed defrosting heat pump system. The distributed defrosting heat pump system comprises at least two heat exchange sets, a heating pipeline, a defrosting pipeline, at least two defrosting valves and at least two main liquid way valves. Each heat exchange set comprises at least one fin heat exchanger. The heating pipeline cyclically communicates with the fine heat exchangers. The defrosting pipeline cyclically communicates with the fine heat exchangers. A defrosting gas pipeline is connected into the fin heat exchangers of the corresponding heat exchange sets through the defrosting valves. A heating high-pressure pipeline is connected into the fin heat exchangers of the corresponding heat exchange sets through the main liquid way valves. The heat exchange sets are adopted for distributed defrosting, one set of fin heat exchangers meeting the defrosting condition firstly can carry out defrosting firstly, a unit normally makes hot water and operates during defrosting, and it is guaranteed that the water outlet temperature of the unit does not fluctuate obviously; during defrosting, the compressor suction and exhaust pressure does not fluctuate obviously, and compressor oil supply and reliable operation are guaranteed; and the heating pipeline is simple and needs no one-way valve, and system operation is reliable.

Description

technical field [0001] The invention relates to a distributed defrosting heat pump system. Background technique [0002] When the heat pump system with air, exhaust air or other moisture-containing gas as the heat source runs for a long time in the heating mode (to make hot water), the fin surface of the fin heat exchanger will frost. Most of the existing defrosting methods are four-way reversing and defrosting from the water side after absorbing heat. There are drastic changes in working conditions, high reliability requirements for components (four-way valves, compressors), and the overall reliability of the unit is not high. [0003] The main disadvantages of the four-way reversing defrosting method: [0004] 1. When the compressor suction temperature is low (below -20°C), there is a problem of long switching time or even failure to switch, resulting in the failure of the unit to operate normally; [0005] 2. After the four-way switch, the exhaust pressure of the compre...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an automatic adjustment system for washing machine rinsing times in order to overcome the defects of many final rinsing times, long rinsing time, low cleaning efficiency and large injection water consumption in the prior art

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