Air cooled heat pump air conditioning unit with low-temperature refrigeration function

Abstract

The invention relates to an air cooled heat pump air conditioning unit with a low-temperature refrigeration function, in particular to control over a fan speed regulator of an outdoor unit by an indoor unit. According to the air cooled heat pump air conditioning unit with the low-temperature refrigeration function, a control module of the indoor unit controls a condensate fan through a fan control point and controls a cold and hot switching electromagnetic valve through a switching control point, the fan speed regulator is connected between the fan control point and the condensate fan, a relay is arranged, a coil of the relay is connected to the switching control point, and the controlled contact of the relay is connected to the fan speed regulator. The method for enabling the fan speed regulator and the cold and hot switching electromagnetic valve to be in synchronous motion includes the following steps that when the cold and hot switching electromagnetic valve is switched by the switching control point to a refrigeration mode, the controlled contact of the relay makes the fan speed regulator connected, and when the cold and hot switching electromagnetic valve is switched by the switching control point to a heating mode, the controlled contact of the relay makes the fan speed regulator bypassed. The fan speed regulator is controlled by the switching control point to act in synchronization with the cold and hot switching electromagnetic valve, thus, the control module of the indoor unit does not need to be additionally provided with a control output point for the outdoor unit, and cost of wiring between the indoor unit and the outdoor unit is saved.

Description

technical field [0001] The invention relates to an air-cooled heat pump air conditioner unit, in particular to the bypass control of an indoor unit to a fan governor in an outdoor unit. Background technique [0002] Air-conditioning units with low-temperature cooling function are generally used in transitional seasons and places where cooling is required in winter, such as data room, communication base station, equipment room, etc. [0003] The low-temperature refrigeration function can be realized by adjusting the speed of the outdoor unit condensing fan to change the air volume according to the system condensing pressure and outdoor temperature. However, the existing air-cooled air-conditioning units with low-temperature refrigeration are generally single-cooling and do not have heat pump functions. [0004] The air-cooled heat pump air-conditioning unit needs to realize that the fan speed controller does not regulate the speed during heating, and the fan speed controller ...

AI Technical Summary

Problems solved by technology

[0003] The low-temperature refrigeration function can be realized by adjusting the rotation speed of the outdoor unit condensing fan to change the air volume according to the system condensing pressure and outdoor temperature. However, the existing air-cooled air-conditioning units with low-temperature refrigeration are generally single-cooling and do not have heat pump functions.

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