Cascade type high-temperature heat pump steam generator

Abstract

The invention provides a cascade type high-temperature heat pump steam generator, and relates to the high-temperature heat pump technology. The steam generator comprises a low-temperature stage circulation system, a high-temperature stage circulation system and a middle heat exchange device, and is further provided with a water supply preheating and heating system, and the water supply preheatingand heating system comprises a water supply preheater, a water storage tank, a water pump and an electromagnetic oven heater; the inlet end of a circulating working medium of the water supply preheater is connected with a low-temperature stage compressor in the low-temperature stage circulation system, the outlet end of thecirculating working medium of the water supply preheater is connected witha low-temperature stage liquid storage tank, the water inlet end of the water supply preheater is connected with the water storage tank through the water pump, the water outlet end of the water supplypreheater is connected with the water inlet end of a condenser, and the water outlet end of the condenser is connected with the electromagnetic oven heater. According to the steam generator, a preheating water supply mode, a heat pump system, cascade type circulation and the variable frequency compression technology are organically combined, an environment-friendly and feasible circulation process is designed and provided, and the heat economic benefit of the cascade heat pump system is improved.

Description

technical field [0001] The invention relates to high-temperature heat pump technology, in particular to a cascaded high-temperature heat pump steam generator. Background technique [0002] At present, the heat pump high-temperature water heater is produced by a single system to produce high-temperature hot water. Compared with the cascade system, this unit is characterized by higher condensation temperature and pressure, resulting in a decrease in heat transfer efficiency and a lower energy efficiency ratio. And it cannot be started when the ambient temperature is low, the system stability is poor, and the economic efficiency is low. [0003] The existing domestic high-temperature air source heat pumps generally refer to: heat pumps with heating water temperature higher than 60°C or air outlet temperature above 80°C, which are used in electroplating, pasteurization, slaughtering, glass cleaning, printing and dyeing and other industries. However, steam above 100°C is rarely ...

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Problems solved by technology

The system is suitable for ultra-low temperature environments, and there is no mention of the operation of the system to adapt to changes in ambient temperature; and the end product of the system is high-temperature hot water, which cannot meet the market's demand for water vapor

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