New energy-saving constant temperature heat exchange unit suitable for indirect heating of low temperature heat sources

Abstract

The invention discloses a new energy-saving constant temperature heat exchange unit suitable for indirect heating of low temperature heat sources, comprising a preheating tank, a constant temperature tank, a temperature sensor, a plate heat exchanger, an electric regulating valve, a plate exchange circulating pump, a return water circulating pump, a An electric two-way valve, a second electric two-way valve and a check valve, the temperature sensor is arranged on the preheating tank, the preheating tank is communicated with the constant temperature tank through a pipeline, the plate heat exchanger The first electric two-way valve is arranged on the pipeline that communicates with the thermostatic tank, and the second electric two-way valve and the check valve are arranged on the pipeline of the plate heat exchanger that is connected to the cold water and water supply. . The plate heat exchanger configured in the present invention is used as a heat source heating device, which solves the problem of a narrow adaptation range caused by the insufficient pressure bearing capacity of the air source heat pump, and at the same time can utilize the heating capacity of the low temperature heat source to the greatest extent, making up for the deficiency of the low heating temperature of the low temperature heat source. .

Description

technical field [0001] The invention relates to the technical field of water supply heat exchange devices, in particular to a novel energy-saving constant temperature heat exchange unit suitable for indirect heating of low-temperature heat sources. Background technique [0002] In the field of civil buildings, such as hotels, hospitals, nursing homes and other places, the requirements for hot and cold water are high, and the hot water system often uses a volumetric heat exchanger system, which can achieve the same source and same pressure water supply, and has a certain amount of hot water. capacity, with heat storage function. However, volumetric heat exchanger equipment can only use heat exchange tube bundles as heat exchange equipment, which has low heat exchange efficiency and large heat exchange temperature difference, which is not conducive to the application of low-temperature heating heat sources such as solar energy, air source heat pump, and building waste heat rec...

AI Technical Summary

Problems solved by technology

However, the volumetric heat exchanger equipment can only use the heat exchange tube bundle as the heat exchange equipment, the heat exchange efficiency is low, and the heat exchange temperature difference is large, which is not conducive to the application of low temperature heating sources such as solar energy, air source heat pump, and building recovery waste heat.

[0003] Up to now, some leading manufacturers of volumetric heat exchangers in the industry have introduced heat exchange systems suitable for direct heating of air source heat pumps and series connection of volumetric heat exchangers, and also introduced indirect heating systems suitable for solar energy and waste heat recovery. However, there are still problems such as the small pressure range of the air source heat pump unit, the high energy consumption level of the circulating water pump, and the unreasonable organization of the hydraulic process.

[0004] At present, the air source heat pump unit generally bears a pressure of about 0.5MPa, and a few can reach 1.0MPa. Systems with pressure exceeding the limit cannot apply this system; at the same time, all cold water replenishment and hot water return heating in the system depend on the heat pump unit and supporting water pumps The water pump consumption is relatively high; the third is that the water output from the unit directly enters the top of the constant temperature heat storage tank, and is adjacent to the water supply port. During the peak period of heavy water consumption, the cold water that is not fully heated may be directly sent to the end of the building, causing Instantaneous low water temperature and water temperature fluctuations, the system can not achieve the function of constant temperature

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