Air conditioning heat pump system

Abstract

The invention provides an air-conditioning heat pump system, which adds a solar auxiliary heat exchange device to the basic air-conditioning heat pump system, and the solar auxiliary heat exchange device includes a second solenoid valve, an auxiliary heat exchanger and a second electronic An expansion valve, the auxiliary heat exchanger includes a shell made of heat storage material and a coil pipe arranged in the shell, the heat storage material of the shell stores solar energy as heat energy and transmits it to the coil pipe . During heating, part of the refrigerant evaporates through the auxiliary heat exchanger and then enters the outdoor unit for evaporation, which reduces the insufficient refrigerant evaporation caused by the low outdoor ambient temperature, the low suction pressure of the system, and the heat generated by the indoor mechanism. Poor effect and other phenomena improve the indoor mechanism heating effect. During defrosting, part of the refrigerant evaporates through the auxiliary heat exchanger and then enters the indoor unit to speed up the defrosting speed, increase the suction pressure of the system, and improve the reliability of the system.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioning heat pump system. Background technique [0002] When the air-conditioning heat pump system is in heating operation, if the outdoor ambient temperature is low, there will be insufficient refrigerant evaporation, low suction pressure of the system, and poor heating effect of the indoor mechanism. In order to improve the heating effect of the indoor mechanism, the current common solution is to install an electric auxiliary heating device for the indoor unit. The disadvantage is that the electric auxiliary heating device consumes a lot of energy and has certain safety hazards. [0003] Affected by the installation conditions of the place of use, if the distance between the indoor unit and the outdoor unit of the air-conditioning heat pump system is relatively long, the piping will be relatively long. During the defrosting operation, the refri...

AI Technical Summary

Problems solved by technology

[0002] When the air-conditioning heat pump system is in heating operation, if the outdoor ambient temperature is low, there will be insufficient refrigerant evaporation, low suction pressure of the system, and poor heating effect of the indoor mechanism.

In order to improve the heating effect of the indoor mechanism, the current common solution is to install an electric auxiliary heating device for the indoor unit. The disadvantage is that the electric auxiliary heating device consumes a lot of energy and has certain safety hazards.

[0003] Affected by the installation conditions of the place of use, if the distance between the indoor unit and the outdoor unit of the air-conditioning heat pump system is long, the piping will be relatively long

During the defrosting operation, the refrigerant circulation process is longer, and the amount of refrigerant flowing through the heat exchanger of the outdoor unit per unit time is relatively small, which affects the defrosting speed to a certain extent.

At the same time, the defrosting process is equivalent to low-temperature refrigeration. During the defrosting process, since the indoor unit is in a state of preventing cold wind, poor evaporation of the refrigerant may lead to low suction temperature and pressure of the system, which will affect the reliability of the system.

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