Hot-melt-type solidification latent heat pump capable of recycling waste heat

Abstract

The invention provides a hot-melt-type solidification latent heat pump capable of recycling waste heat and belongs to the field of heat pumps. The heat pump comprises a compressor, a condensate water box dry filter, a throttling device, an evaporation water tank, a gas-liquid separator, an evaporation water tank circulating pump, a condensate water box circulating pump, a liquid level meter, a user heat utilization system, a water collector, a dirt separation, a tap water electromagnetic valve, a drainage electromagnetic valve and a controller. Compared with a conventional sewage source heat pump system, the heat pump provided by the invention has the advantages that deep living sewage utilization is realized; through melting and removing ice by virtue of waste heat of living sewage, two alternate freezing and ice melting processes on a heat exchange surface are reduced, the living sewage temperature is reduced, the perennial normal starting and stable operation of a heat pump unit is ensured, furthermore, heat provided by a low-order heat source can meet the consumed heat load demand of a user, the structure is simple, maintenance and overhaul are convenient, and the heat pump can be widely applied to the fields of domestic hot-water supply and heat supply.

Description

technical field [0001] The invention belongs to the field of heat pumps, and in particular relates to a solidification latent heat heat pump which utilizes waste heat sensible heat for deicing and utilizes waste heat sensible heat and latent heat as low-level heat sources of the heat pump. Background technique [0002] With the rapid development of my country's economy, the level of urbanization and the continuous improvement of people's living standards, the demand for domestic hot water in families, hotels, schools, hospitals, baths, etc. is also increasing. At present, there are usually the following ways to prepare domestic hot water: (A) hot water boilers using high-grade heat sources (such as coal, oil, gas, electric heating); (B) using solar energy as the main heat source, gas boilers Or a hot water system with electric heating as an auxiliary heat source; (C) heat pump hot water systems such as water source heat pumps or air source heat pumps, etc. Since domestic ho...

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Problems solved by technology

In addition, in order to solve the problem that the air-cooled heat pump has low working efficiency or even cannot operate normally when the ambient temperature is low, the invention patent (application number is CN 200910184024.6) proposes a dual heat source heat pump, which has two operating modes, When the ambient temperature is high, the air source is used as the heat source, and when the ambient temperature is low, part of the latent heat of water is used as the heat source, thus ensuring that the heat pump system has a high working efficiency when the ambient temperature is low, but how to prepare flowing ice , to meet the demand of continuous extraction of condensation heat from water is the key to the stable operation of the heat pump system

In the process of extracting the heat of solidification, in order to make the frozen ice be stripped from the heat exchange surface in time while meeting the economic benefits, and to make the ice water flow in the pipeline without blockage, the invention patent (patent number is CN 200610009616.0, CN 200610009740.7) proposed a scraper-type solidification heat collection device, which peeled off the ice frozen on the heat exchange tube from the wall in the form of mechanical "scraping", mixed with water to form ice flocs, and was taken away with the water, thereby continuously collecting Solidification heat, but the method of mechanical deicing has the problems of complex equipment structure and high cost

[0004] When domestic sewage is recycled, it has the remarkable characteristics of high waste heat temperature and rich heat energy (it can reach above 30°C), but when it is used as a low-level heat source of water source heat pump, when domestic hot water is heated by water source heat pump unit, the following problems will occur : (1) In areas where the temperature is low in winter, the temperature of tap water is low in winter, such as about 5°C, while the temperature of waste heat is about 30°C. Use a low-level heat source at about 30°C to heat the tap water at about 5°C through a heat pump to meet When the domestic water temperature is required, the heat pump unit cannot start normally under this working condition

(2) When the heat pump is heating domestic hot water, the temperature of the cold water on the condensing side gradually increases, resulting in a gradual increase in the condensing temperature. At the same time, due to insufficient sewage water, domestic sewage needs to be stored in the water storage tank, and the evaporating side The temperature of the sewage gradually decreases, resulting in a gradual decrease in the evaporation temperature. During the entire operation of the heat pump unit, the condensing temperature and evaporation temperature vary widely, and the stability of the heat pump unit operation is poor.

(3) When tap water at about 5°C is heated to meet the temperature requirements of domestic water through the heat pump unit, only the sensible heat of domestic sewage is recovered, which cannot meet the heat load needs of users on the condensation side

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