Speed adjusting device, air-conditioning system and speed adjusting method for air-conditioning system

Abstract

The invention relates to a low-temperature speed adjusting device applied to an air-conditioning system and a speed adjusting method for the air-conditioning system, and also relates to the air-conditioning system using the speed adjusting device. The speed adjusting device comprises a pressure switch and a chopped wave speed adjusting plate, wherein the pressure switch is arranged on a gas exhaust pipe of a compressor of the air-conditioning system; the chopped wave speed adjusting plate further comprises a main controller, and a pressure switch signal input interface, a power supply circuit, a 485 communication module, a zero crossing detection circuit and a motor control signal output module, which are connected with the main controller; the chopped wave speed adjusting plate is communicated with an outer machine main board of the air-conditioning system through the 485 communication module and receives state information of the pressure switch through the pressure switch signal input interface; a logical program is stored in the main controller, and controls the rotating speed of an outer blower according to pressure switch signals and running time and running modes of the air-conditioning system; and the power supply circuit is connected with the outer machine main board of the air-conditioning system. The novel low-temperature refrigerating and speed adjusting device has the characteristics of low cost and low failure rate.

Description

technical field [0001] The invention relates to a low-temperature speed regulating device applied to an air-conditioning system and a speed regulating method of the air-conditioning system, and also relates to an air-conditioning system using the above-mentioned speed regulating device. Background technique [0002] In many regions such as Europe, some bakeries, kitchens and high-end restaurants still need to maintain the comfort of indoor air in winter when the outdoor weather is very cold. They cannot meet the indoor constant temperature and humidity requirements by simply turning on the heater. Ordinary air conditioners cannot operate safely and reliably in low temperature environments, so it is necessary to develop a low temperature refrigeration air conditioner to adjust indoor comfort in low temperature environments. At present, the low-temperature refrigeration speed control devices commonly used in China use pressure sensors and temperature sensors to jointly adjust ...

AI Technical Summary

Problems solved by technology

[0002] In many regions such as Europe, some bakeries, kitchens and high-end restaurants still need to maintain the comfort of indoor air in winter when the outdoor weather is very cold. They cannot meet the indoor constant temperature and humidity requirements by simply turning on the heater. Ordinary air conditioners cannot operate safely and reliably in low temperature environments, so it is necessary to develop a low temperature refrigeration air conditioner to adjust indoor comfort in low temperature environments

At present, the low-temperature refrigeration speed control devices commonly used in China use pressure sensors and temperature sensors to jointly adjust the air volume of the external fan by detecting the exhaust pressure value of the air conditioner compressor and the outdoor ambient temperature to achieve low-temperature refrigeration. The cost of a pressure sensor At more than two hundred yuan, the cost is relatively expensive; the cost of a pressure switch is only more than ten yuan, not only the cost is greatly reduced, but also the reliability is stronger

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