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Control and protection method for air conditioner and air conditioner

A technology for controlling protection and air conditioning, applied in heating and ventilation control systems, mechanical equipment, heating and ventilation safety systems, etc., can solve problems such as increased fouling coefficient of heat exchangers, lower user satisfaction, and affect normal heat transfer, etc. Achieve the effects of preventing low heat exchange efficiency, avoiding frequent start and stop, and improving work efficiency

Active Publication Date: 2019-04-12
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The side where the condenser is located in the air conditioner is the high-pressure side. When the flow of cooling water in it is insufficient, the system will run at high pressure and high temperature, causing frequent high-voltage protection alarms and unit start-up and shutdown. The side where the evaporator is located in the air-conditioner is the low-pressure side. Insufficient chilled water flow will cause the system to operate at low pressure and low temperature, causing frequent low-pressure protection alarms and unit start-up and shutdown, which will greatly reduce the user's goodwill, and because the heat exchanger fouling coefficient becomes larger, it will affect the normal heat exchange. Air conditioning can also cause damage

Method used

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  • Control and protection method for air conditioner and air conditioner
  • Control and protection method for air conditioner and air conditioner

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Embodiment Construction

[0033] The control and protection method proposed by the present invention is used in an air conditioner. The control and protection method includes: detecting the actual pressure value of the air conditioner, and checking whether the air conditioner operates abnormally when the actual pressure value changes to a preset check value. Among them, the preset check value is less than the preset high pressure protection value, greater than the preset low pressure protection value, and when the actual pressure value rises to the high pressure protection value or falls to the low pressure protection value, the air conditioner is shut down for protection. Preferably, the actual pressure value is detected at preset time intervals each time and it is judged whether it has changed to a preset check value.

[0034] In a preferred embodiment, the way to check whether the air conditioner is abnormal is to detect the actual water flow of the heat exchanger in the air conditioner, and judge wh...

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Abstract

The invention discloses a control and protection method for an air conditioner and the air conditioner. The control and protection method comprises the following steps that an actual pressure value ofthe air conditioner is detected, and whether the air conditioner operates abnormally or not is checked when the actual pressure value changes to a preset check value; and the preset check value is less than the preset high-voltage protection value and greater than the preset low-voltage protection value. By the adoption of the control and protection method for the air conditioner and the air conditioner, frequent starting and stopping of the air conditioner can be avoided, the air conditioner is effectively protected and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a control and protection method for the air conditioner and the air conditioner. Background technique [0002] In the existing air conditioner, the pressure protection of the system will be judged to start and stop according to the pressure value of the heat exchanger. However, in the actual installation project, users often consider the installation cost and do not install filters on the water side according to the regulations, resulting in cooling water or freezing. The water quality cannot be guaranteed, and long-term operation will produce more deposits such as scale and sand, which will reduce the water flow in the heat exchanger. [0003] The side where the condenser is located in the air conditioner is the high-pressure side. When the flow of cooling water in it is insufficient, the system will run at high pressure and high temperature, causing frequent high-volta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/30F24F11/64F24F140/12
CPCF24F11/30F24F11/64F24F2140/12
Inventor 石伟王传华罗来平唐育辉
Owner GREE ELECTRIC APPLIANCES INC
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