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Exhaust low-temperature control method of air conditioner cold and hot water unit and air conditioner cold and hot water machine

A technology of a cold and hot water unit and a control method, which is applied in the field of air conditioner cold and hot water machine, and air conditioning cold and hot water unit exhaust low temperature control field, can solve the problem that the cooling exhaust temperature sensor bag falls off, affects the reliable operation of the compressor, and causes external problems. It can improve the reliability of products, solve the problem of long-term liquid accumulation and operation, and solve the problem of easy carbonization.

Active Publication Date: 2020-05-15
格力电器(杭州)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the existing air-conditioning hot and cold water machines are left at low ambient temperature for a long time, after the lubricating oil in the compressor cavity condenses the refrigerant gas into a liquid, the problem of dilution of the lubricating oil is likely to occur during the heating process, making the The mechanical moving parts in the compressor cavity cannot be lubricated enough during operation; moreover, during the refrigeration process, the cooling exhaust temperature sensing package falls off, the external protection function fails, and the lubricating oil in the compressor cavity is easy to carbonize during long-term high-temperature operation , affecting the reliability of compressor operation

Method used

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  • Exhaust low-temperature control method of air conditioner cold and hot water unit and air conditioner cold and hot water machine
  • Exhaust low-temperature control method of air conditioner cold and hot water unit and air conditioner cold and hot water machine

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Embodiment 1

[0043] Such as figure 1 , a method for controlling the low temperature of the exhaust of an air-conditioning hot and cold water unit. In the cooling mode, by calculating the temperature difference between the exhaust temperature of the compressor and the ambient temperature, and determining whether the exhaust temperature sensing bulb has fallen off the pipeline by judging Fault. In the cooling mode, after the compressor is started, the temperature difference between the exhaust temperature and the ambient temperature is calculated, and the artificial intelligence exhaust low temperature control logic program recognizes that the exhaust temperature sensing package has fallen off the pipeline to prevent the failure of the external exhaust high temperature protection. Solve the problem of easy carbonization of compressor lubricating oil under long-term high-temperature operation. Specifically, the steps are as follows:

[0044] S11. Run cooling mode.

[0045] S12. After the r...

Embodiment 2

[0070] The present invention also provides an air-conditioning cold and hot water machine, which is used to realize the method for controlling the low temperature of the exhaust gas of the air-conditioning cold and hot water unit described in Embodiment 1. The air-conditioning hot and cold water machine also includes a compressor, an outdoor unit, an indoor unit, a throttling device and the like. The air-conditioning hot and cold water machine can prevent the compressor cavity from running at high temperature for a long time, solve the problem that the lubricating oil in the compressor cavity is easy to carbonize under long-term high temperature, and can effectively solve the long-term liquid accumulation of the compressor after the unit is placed at low temperature and started Operation problems, so that product reliability is improved.

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Abstract

The invention relates to an exhaust low-temperature control method of an air conditioner cold and hot water unit. The method is characterized in that in the refrigeration mode, a temperature difference value between the exhaust temperature of a compressor and the ambient temperature is calculated, and judging is carried out, so that whether the fault that an exhaust temperature wrap falls off froma pipeline exists or not is determined; and in the heating mode, a difference value between the exhaust temperature of the compressor and the water outlet temperature of the compressor is calculated,and judging is carried out, so that the step number of an electronic expansion valve of the unit is adjusted to ensure the normal operation of the compressor. According to the exhaust low-temperaturecontrol method of the air conditioner cold and hot water unit, in the refrigeration mode, a compressor cavity can be prevented from operating at the high temperature for a long term, and the problemthat lubricating oil of the compressor cavity is prone to carbonize at the high temperature for a long term is solved; and meanwhile, in the heating mode, after the unit is placed and started at the low temperature, the long-term liquid accumulation operation problem of the compressor can be effectively solved, so that the reliability of a product is improved. The invention further provides the air conditioner cold and hot water machine for realizing the exhaust low-temperature control method of the air conditioner cold and hot water unit.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, in particular to a method for controlling the low temperature of the exhaust of an air conditioner chiller and hot water unit; Background technique [0002] An air conditioner hot and cold water machine is a household appliance that efficiently uses domestic water for cooling and heating. With the advantages of high performance and environmental protection of the air-conditioning cold and hot water machine, it is being promoted on a large scale. However, when the existing air-conditioning hot and cold water machines are placed in a low ambient temperature for a long time, after the lubricating oil in the compressor cavity condenses the refrigerant gas into a liquid, the problem of dilution of the lubricating oil is likely to occur during the heating process, making the The mechanical moving parts in the compressor cavity cannot be lubricated enough during operation; moreover, du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/32F24F11/64F24F11/65F24F11/84F25B41/06F24F110/10F24F140/20F25B41/34
CPCF24F11/32F24F11/64F24F11/65F24F11/84F24F2110/10F24F2140/20F25B2500/16F25B2500/28F25B41/40F25B41/31Y02B30/70
Inventor 唐小朱罗建飞曾奕郭庆郭旭
Owner 格力电器(杭州)有限公司