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A method for controlling the exhaust temperature of an air-conditioning cold and hot water unit, and an 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 unit, 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, which affects the reliable operation of the compressor and lubrication. Oil dilution and other problems, to improve product reliability, solve long-term liquid accumulation operation problems, and solve the effect of easy carbonization

Active Publication Date: 2021-10-01
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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  • A method for controlling the exhaust temperature of an air-conditioning cold and hot water unit, and an air conditioner cold and hot water machine

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Effect test

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 a low-temperature control method for 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 by judging whether there is an exhaust temperature-sensing package from the tube In the heating mode, by calculating the difference between the exhaust temperature of the compressor and the outlet water temperature of the outdoor unit, and by judging and adjusting the number of steps of the electronic expansion valve of the unit to ensure the normal operation of the compressor. The low-temperature control method of the air-conditioning cold and hot water unit of the present invention can prevent the compressor cavity from running at a high temperature for a long time in the cooling mode, and solve the problem that the lubricating oil in the compressor cavity is easy to carbonize at a long-term high temperature; at the same time, in the heating In this mode, after the unit is placed at low temperature and started, it can effectively solve the long-term liquid accumulation operation problem of the compressor and improve product reliability; it also provides an air conditioner cooling system for realizing the low temperature control method of the air-conditioning hot and cold water unit exhaust. Water Heater.

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 Patents(China)
IPC IPC(8): F24F11/32F24F11/64F24F11/65F24F11/84F25B41/34F24F110/10F24F140/20
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