Throttling system for refrigeration and heating

Abstract

The invention discloses a throttling system for refrigeration and heating, which comprises an evaporator, a condenser, a refrigerating expansion valve and a heating expansion valve, wherein the input end of the refrigerating expansion valve is connected with the output end of the condenser, the output end of the refrigerating expansion valve is connected with the input end of the evaporator, a first temperature sensing bulb of the refrigerating expansion valve is connected with the evaporator, the input end of the heating expansion valve is connected with the output end of the evaporator, the output end of the heating expansion valve is connected with the input end of the condenser, and a second temperature sensing bulb of the heating expansion valve is connected with the condenser. The refrigerating expansion valve is arranged for realizing refrigeration of the system, and the heating expansion valve is arranged for realizing heating of the system, so that the throttling system for refrigeration and heating has optimal refrigerating and heating efficiency so as to realize efficient heating in winter in the cold areas of northern China, thus achieving the energy saving and emission reduction and replacing the traditional heating through a hot water boiler and domestic hot water supply.

Description

technical field [0001] The invention relates to the technical equipment field of refrigeration and heating, and more specifically relates to a throttling system for refrigeration and heating. Background technique [0002] General heat pump throttling devices use the same expansion valve for cooling and heating, which is usually set according to the cooling conditions in summer, and will not be readjusted for heating in winter. The condensation temperature of the ice source heat pump is about 30°C and the evaporation temperature is about 5°C during cooling in summer. The condensation temperature is about 50°C and the evaporation temperature is about -5°C when heating in winter in the south, and the evaporation temperature is about -15°C when heating in winter in the north. Therefore, the working conditions of the cooling and heating systems are quite different. The evaporation capacity during cooling is much larger, while the ambient temperature during heating is low, the ev...

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a throttling system for refrigeration and heating to solve the problems of mutual influence of refrigeration and heating and poor heating effect when the temperature difference in the north is large.

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