Combined cooling and heating system with clean heat energy defrosting function and control method

A technology for combined cooling and heating and heat energy, applied in the field of heat pumps, can solve the problems of increasing the heat transfer heat resistance of the surface of the heat exchanger, increasing the resistance of air flowing through the heat exchanger, and reducing the heat transfer coefficient of the heat exchanger, so as to save energy. Non-renewable energy, simple structure, and the effect of reducing operating costs

Pending Publication Date: 2021-10-29
RICHU DONGFANG SOLAR ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of weather and other natural conditions, relying entirely on solar energy for heating has certain limitations, so auxiliary heat energy is indispensable in the heating system, and using air heat energy to supplement heat is a very common auxiliary heating method
[0003] However, air source heat pumps are prone to frosting problems when they are running in winter. The formation of frost layer not only increases the heat conduction resistance of the surface of the heat exchanger, which leads to a decrease in the heat transfer coefficient of the heat exchanger, but also increases the air flow rate. The resistance of the superheat exchanger reduces the heating capacity of the unit

Method used

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  • Combined cooling and heating system with clean heat energy defrosting function and control method

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Embodiment 1

[0021] Embodiment 1, with reference to figure 1 , a clean heat energy defrosting combined cooling and heating system, including a solar water heater 1, a heat pump unit 2, and an end system, the solar water heater 1 includes a heat collector and a water collection tank 11, and the end system includes a water terminal 13 and a circulation terminal;

[0022] The condensing end 3 of the heat pump unit 2 is provided with a heat supply port and a return water port, and the heat supply port and the return water port communicate with the circulation terminal in the terminal system through the water outlet pipe 5 and the water return pipe 4 to form a circulation loop;

[0023] A heat exchange coil 9 is arranged in the hot water tank 11, and a defrosting coil 8 is installed on the evaporation end 7 of the heat pump unit 2. The hot water tank 11 is connected to the water terminal 13 through the water supply pipe I12;

[0024] The hot water tank 11 communicates with the return pipe 4 th...

Embodiment 2

[0029] Embodiment 2, a control method of a clean heat energy defrosting combined cooling and heating system, the method uses the clean heat energy defrosting combined cooling and heating system described in any one of the above embodiments, and the control methods in different modes are as follows:

[0030] Cooling mode: control solenoid valve Ⅱ17, solenoid valve Ⅲ18, and circulating water pump 19 to turn on, so that solar circulating water pump 16 and solenoid valve Ⅰ31 are turned off, and the heat pump unit 2 exchanges cooling capacity to the water in the fan coil unit 26 through the condensing end 3 to realize refrigeration Effect: when it is detected that the temperature in the hot water tank 11 is lower than the temperature of the evaporating end 7, the defrosting water pump 22 will turn on the antifreeze and flow out from the heat exchange coil 9 to recover part of the heat to the hot water tank 11, reducing the temperature of the evaporating end. 7 temperature to improve...

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Abstract

The invention discloses a combined cooling and heating system with a clean heat energy defrosting function and a control method, and belongs to the technical field of heat pumps. The system comprises a solar water heater, a heat pump unit and a tail end system, wherein the solar water heater comprises a heat collector and a heat collection water tank, and the tail end system comprises a water using terminal and a circulation terminal; a heat supply port and a water return port are formed in the condensation end of the heat pump unit, and the heat supply port and the water return port communicate with a circulation terminal in the tail end system through a water outlet pipe and a water return pipe to form a circulation loop. a heat exchange coil pipe is arranged in the heat collection water tank, and a defrosting coil pipe is arranged at the evaporation end of the heat pump unit; the defrosting coil pipe communicates with the heat exchange coil pipe through a defrosting circulating pipeline; and the heat collection water tank is connected with the water using terminal through a water supply pipe I. Solar energy can be fully utilized for defrosting, and the problem that indoor comfort is affected by reverse circulation defrosting of air energy in winter is effectively solved.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a clean heat energy defrosting combined cooling and heating system and a control method. Background technique [0002] With the rapid development of society, the shortage of conventional energy and the increasingly serious problems of environmental pollution, the development and utilization of new energy, especially clean energy, has been paid more and more attention. Solar energy has the characteristics of wide distribution, safety and environmental protection, and is an inexhaustible renewable energy source. However, due to the influence of weather and other natural conditions, relying entirely on solar energy for heating has certain limitations, so auxiliary heat energy is indispensable in the heating system, and using air heat energy to supplement heat is a very common auxiliary heating method. [0003] However, air source heat pumps are prone to frosting problems when th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B27/00F25B41/20F25B47/02F25B49/02
CPCF25B27/005F25B47/022F25B49/02F25B41/20
Inventor 李开春许道金张景珊李豪举李昊霖王岩刘广虎
Owner RICHU DONGFANG SOLAR ENERGY
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