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Control method of air conditioner in heating mode and air conditioner

A technology of an air conditioner and a control method, which is applied to heating and ventilation control systems, mechanical equipment, heating and ventilation safety systems, etc. Reduce frosting and avoid frequent entry into the effect of defrosting

Pending Publication Date: 2019-02-12
AUX AIR CONDITIONING LTD BY SHARE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Air conditioners have become a popular consumer product. Especially in winter or when heating is required, the external units of existing related air conditioners are prone to frost. For this reason, it is necessary to set up a defrosting program to control the direction of the four-way valve, and to discharge air to the coil of the outdoor unit. However, this control method turns the indoor unit into the cooling mode after the four-way valve is turned, causing the indoor temperature to drop, which is likely to affect the heating comfort and affect the consumer experience.
[0003] For this reason, the related technology adopts intermittent defrosting technology, and stops defrosting and restores indoor heating before the indoor temperature drops to the user's perceivable temperature range. This method is easy to cause low pressure in the system and low temperature of the external disk, resulting in failure of defrosting

Method used

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  • Control method of air conditioner in heating mode and air conditioner
  • Control method of air conditioner in heating mode and air conditioner

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Embodiment 1

[0024] With the help of figure 1 The technical solution of the present invention is schematically described. According to the control method of the air conditioner in the heating mode of the present invention, the ambient temperature of the outdoor unit is obtained by the ambient temperature sensor, and the coil temperature T1 of the outdoor unit is obtained by the coil temperature sensor of the outdoor unit. The controller controls the electronic expansion valve to adjust the opening; when the ambient temperature is in the first preset temperature range, the controller judges whether the first preset time t1 and the outdoor unit coil temperature T1 meet the first preset temperature T1 Assuming a condition, if yes, then controlling the electronic expansion valve at the first opening degree.

[0025] The first preset temperature range is the easy-to-frost temperature range, usually between 2°C and 5°C. This temperature range fluctuates according to the ambient air pressure in d...

Embodiment 2

[0029]This embodiment further adds control logic on the basis of Embodiment 1. When the electronic expansion valve works at the first opening degree, the outdoor unit coil temperature sensor obtains the current outdoor unit coil temperature, and the controller judges the second preset time t2 and Whether the current coil temperature T2 of the outdoor unit satisfies the second preset condition, and if so, the electronic expansion valve is controlled to work at the second opening degree. Wherein the second preset condition is that the second preset time t2≧ta minutes and the outdoor unit coil temperature T2≦Ta°C. Correcting the electronic expansion valve under this condition The opening adjustment of the electronic expansion valve is usually adjusted according to the set opening gradient. For example, if the opening parameter gradient is set to Δk2, the controller increases the electronic expansion valve according to the set opening parameter gradient Δk2 From the opening degree...

Embodiment 3

[0032] This embodiment provides an air conditioner, such as figure 1 As shown, it includes an indoor unit coil (indoor heat exchanger), an outdoor unit coil (outdoor heat exchanger), an electronic expansion valve connected between the indoor unit coil and the outdoor unit coil, and A control system for controlling the opening of the electronic expansion valve, the control system includes a controller, an outdoor unit coil temperature sensor for detecting the temperature of the outdoor unit coil, an ambient temperature sensor for detecting the outdoor ambient temperature, and a time relay, In the heating mode, when the ambient temperature is within the first preset temperature range of 2°C to 5°C, the controller judges whether the first preset time t1 and the outdoor unit coil temperature T1 meet the first preset condition, and if so Then control the electronic expansion valve at the first opening degree. The above-mentioned first preset condition is that the first preset time...

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Abstract

The invention discloses a control method of an air conditioner in a heating mode. The method comprises the steps that the environment temperature of an outdoor unit is obtained through an environmenttemperature sensor, the coil pipe temperature T1 of the outdoor unit is obtained through an outdoor unit coil pipe temperature sensor, the electronic expansion valve is controlled by a controller to adjust the opening degree, when the environment temperature is in the first preset temperature interval, the controller judges whether first preset time t1 and the outdoor unit coil pipe temperature T1meet first preset conditions or not, and if yes, the electronic expansion valve is controlled to be in the first opening degree. According to the control method of the air conditioner in the heatingmode, the low pressure and outer coil temperature are adjusted by comprehensively considering the environment temperature, the air conditioner outdoor unit coil pipe temperature and operation time, the opening degree of the electronic expansion valve is controlled to adjust the low pressure and the outer coil temperature, outdoor unit defrosting is weakened, frequent defrosting is avoided, using comfort is improved for users, and the configuration cost and the after-sales repair cost are not increased.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to a control method and an air conditioner in the heating mode of the air conditioner. Background technique [0002] Air conditioners have become a popular consumer product. Especially in winter or when heating is required, the external units of existing related air conditioners are prone to frost. For this reason, it is necessary to set up a defrosting program to control the direction of the four-way valve, and to discharge air to the coil of the outdoor unit. However, this control method turns the indoor unit into the cooling mode after the four-way valve is turned, causing the indoor temperature to drop, which is likely to affect the heating comfort and affect the consumer experience. [0003] For this reason, the related technology adopts intermittent defrosting technology, and stops defrosting and restores indoor heating before the indoor temperature drops to the user's perceiva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/42F24F11/64F24F11/84F24F110/12F24F140/20
CPCF24F11/42F24F11/64F24F11/84F24F2140/20F24F2110/12
Inventor 曾友坚
Owner AUX AIR CONDITIONING LTD BY SHARE LTD
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