Temperature control multi-split heat pump system with heat recovery function and control method thereof

Abstract

The invention provides a temperature control multi-split heat pump system with a heat recovery function and a control method of the temperature control multi-split heat pump system with the heat recovery function. The temperature control multi-split heat pump system with the heat recovery function comprises a multi-split heat pump refrigeration system, a water tank, a first electromagnetic valve,a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, an electric control box and a first electronic expansion valve, and all the components constitute a heat pump heat recovery module and an auxiliary heat exchange module of the system. The multiple electromagnetic valves are arranged so as to be alternately switched on and off to form different refrigerant flow channels. Heat generated during heat pump refrigerating is effectively used for heating water, so that heat recovery is achieved; and besides, the problems that by the adoption of an existing multi-split heat pump system, the supercooling degree of a liquid pipe and superheat degree of a gas return opening of a compressor are difficult to control and improve, and the temperature of an electric control module is difficult to lower are solved together.

Description

technical field [0001] The invention relates to the technical field of heat pump systems, in particular to a temperature-controlled multi-connection heat pump system with heat recovery function and a control method. Background technique [0002] The multi-connected heat pump system is widely used due to its flexible control method and simple installation method. However, when it is independently refrigerated, the heat generated in the whole process is directly discharged to the outside through the outdoor unit placed outside. In this way, not only The energy consumption of the outdoor fan is increased, and the heat generated by refrigeration is directly discharged to cause energy waste. In addition, the high temperature of the electronic control module of the multi-connected system limits the scope of use of the compressor. At present, most of the electronic control modules of the multi-connected system The module is cooled by fans or refrigerants. This way is to transfer he...

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Problems solved by technology

[0002] The multi-connected heat pump system is widely used due to its flexible control method and simple installation method. However, when it is independently refrigerated, the heat generated in the whole process is directly discharged to the outside through the outdoor unit placed outside. In this way, not only The energy consumption of the outdoor fan is increased, and the heat generated by refrigeration is directly discharged to cause energy waste. In addition, the high temperature of the electronic control module of the multi-connected system limits the scope of use of the compressor. At present, most of the electronic control modules of the multi-connected system The module is cooled by fans or refrigerants. This way is to transfer heat to the system. In the gas-liquid separator, due to the insufficient superheat of the compressor, the supercooling of the multi-line is generally performed by the external condenser. To increase the subcooling degree, more condenser area needs to be wasted, causing more cost to the external unit. In addition, if the return air temperature of the compressor is low at low temperature, it is easy to cause the phenomenon of compressor liquid return. The usual practice is Electrically heating the compressor not only wastes energy, but also causes problems such as low energy efficiency of the heat pump system and poor cooling effect

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