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Instant waste heat recycling heating unit and water outflow thermostatic control method thereof

A technology of waste heat recovery and constant temperature control, which is applied to machines, fluid heaters, lighting and heating equipment using waste heat, which can solve the problem that waste heat cannot be fully recycled, waste water cannot be stored for a long time, and waste hot water cannot be stored for a long time. Large emissions, etc., to achieve efficient operation, increase the suction temperature, and increase the effect of heating

Active Publication Date: 2015-06-24
JIANGSU TENESUN ELECTRICAL APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a constant temperature control method for the instant waste heat recovery heating unit, which is used to solve the problems of relatively large daily discharge of waste water in industrial enterprises, unstable wastewater temperature, and impossibility of wastewater for a long time. Storage, the technical problem that the heat of waste water cannot be fully recycled

Method used

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  • Instant waste heat recycling heating unit and water outflow thermostatic control method thereof
  • Instant waste heat recycling heating unit and water outflow thermostatic control method thereof
  • Instant waste heat recycling heating unit and water outflow thermostatic control method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0086] Cooling and hot water operation mode: after the waste water feeds at 50°C-70°C and the cold water feeds at 15°C and passes through the water / water heat exchanger 160 for primary heat recovery, the water temperature in the waste water tank drops to between 30°C-40°C, while the cold water The temperature rises to 25°C-30°C, then the waste water flows into the evaporator 130 for secondary heat recovery, the temperature of the heat recovered waste water drops to about 12°C, and the 12°C waste water from the evaporator 130 passes through the third three-way valve 330, through the one-way valve 340, it flows into the end 500 of the air conditioner for refrigeration. The cold water heated to 25°C-30°C passes through the thermostatic control valve 350 and then flows into the condenser 150 for secondary heating. The single-chip control unit 300 detects the water temperature of the hot water tank in real time, calculates the opening degree of the thermostatic control valve accord...

Embodiment 2

[0088] Working mode of heating and hot water production in winter: the waste hot water at 50°C-70°C from the waste water pool passes through the first three-way valve 310 and enters the air conditioner end 500 to realize the heating function, and the waste water flowing out of the air conditioner end 500 passes through the second The three-way valve 320, through the first heat source circulation pump 411 and / or the second heat source circulation pump 412, realizes the function of two-stage heat recovery to produce hot water; The water heat exchanger 160 performs primary heat exchange with the 5°C-10°C cold water from the water inlet solenoid valve 350, the water temperature of the waste water tank drops to 20°C-30°C, and the cold water temperature rises to 15°C-25°C. The waste water flowing out of the water / water heat exchanger 160 flows into the evaporator 130 for secondary heat recovery, the temperature of the waste water after the secondary heat recovery drops to about 8°C, ...

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Abstract

The invention discloses an instant waste heat recycling heating unit and a water outflow thermostatic control method of the heating unit, and relates to a fluid heater using a heat pump and a control method of the fluid heater, in particular to the instant waste heat recycling heating unit and the water outflow thermostatic control method of the heating unit which are used for a waste heat comprehensive utilization system. The instant water heat recycling heating unit comprises a double-system heat pump, a water inlet electromagnetic valve, a thermostatic control valve and a water / water heat exchanger used for primary heat recovery, wherein the double-system heat pump comprises a first compressor, a second compressor, a first throttling valve, a second throttling valve, an evaporator, a first gas-liquid separator, a second gas-liquid separator and a condenser. By means of steam recycling with heat, the fact that refrigerants before throttling are supercooled is guaranteed, the suction temperature of a product is increased, heating capacity of the product is improved, and damage caused by liquid impact to the compressors is prevented. According to the relation of water tank water temperature, waste water temperature and set water temperature, due to the fact that the thermostatic control valve carries out a PID algorithm, openness of the thermostatic control valve is controlled, water flow is adjusted, and therefore the water tank water temperature keeps constant when the waste water temperature fluctuates.

Description

technical field [0001] The invention relates to a fluid heater utilizing a heat pump and a control method thereof, in particular to an instant waste heat recovery heating unit used in a waste heat comprehensive utilization system and a constant temperature control method of the outlet water. Background technique [0002] Printing and dyeing, electronics, food processing, chemical industry, metallurgy and other enterprises need to supply a large amount of hot water in the production process, and at the same time generate more waste water (30-70 ℃), large and medium-sized collective bathrooms also have a large amount of waste heat from bathing Water (around 30°C) is produced. These waste hot water discharged from modern industrial production and daily life usually cannot be reused after generation, but are directly discharged into the environment, or discharged into the environment after corresponding required purification treatment. These waste heat not only cannot be used, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B27/02F25B43/00F25B49/02F24H9/20
CPCY02A30/274
Inventor 王玉军杨奕刘军许春林李鲲
Owner JIANGSU TENESUN ELECTRICAL APPLIANCE
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