CN-122015233-A - Defrosting control method, device, medium and air conditioner

CN122015233ACN 122015233 ACN122015233 ACN 122015233ACN-122015233-A

Abstract

The invention discloses a defrosting control method, a device, a medium and an air conditioner, wherein a target evaluation parameter for evaluating a defrosting load is obtained, when the parameter indicates that the defrosting load is in a load risk state, a defrosting exit condition is switched from an initial first condition to a second condition which is easier to trigger, and a defrosting mode is exited in time when the second condition is met.

Inventors

MO SHAOWEN
CHEN XIANGJI
XIONG JUN
DAI WENJIE
ZHANG HONGLIANG
LI ZHENZHONG
LIN YIFENG

Assignees

广东TCL智能暖通设备有限公司

Dates

Publication Date: 20260512
Application Date: 20260327

Claims (10)

1. A defrost control method, the method comprising: After entering a defrosting mode, acquiring target evaluation parameters, wherein the target evaluation parameters are used for evaluating defrosting loads; switching a defrost exit condition from an initial first condition to a second condition when the target evaluation parameter indicates that the load risk state is currently in, wherein the second condition is more easily triggered than the first condition; And when the second condition is met, exiting the defrosting mode.
2. The defrost control method of claim 1, wherein the target evaluation parameters include a coil temperature, a temperature rise rate of the coil, and a suction side pressure of the compressor, the method further comprising, before switching the defrost exit condition from the initial first condition to the second condition: And judging that the coil temperature is in a phase transition temperature monitoring interval and meets a third condition, and/or judging that the coil temperature is in a load risk state currently when the suction side pressure meets a fourth condition, wherein the third condition is that the temperature rising rate is greater than or equal to a rising rate value and the duration time is greater than a first time threshold, and the fourth condition is that the suction side pressure is greater than or equal to a first pressure threshold.
3. The defrost control method of claim 1, wherein the first condition is a coil temperature greater than or equal to a first temperature threshold and the second condition is a coil temperature greater than or equal to a second temperature threshold, wherein the second temperature threshold is less than the first temperature threshold.
4. The defrost control method of claim 1, wherein the first condition is a defrost accumulation time period greater than or equal to a first time period threshold and the second condition is a defrost accumulation time period greater than or equal to a second time period threshold, wherein the second time period threshold is less than the first time period threshold.
5. The defrost control method of claim 1, wherein the exiting the defrost mode comprises: and controlling the operation of the external fan until the decompression completion condition is met, and exiting the defrosting mode.
6. The defrost control method of claim 5, wherein the pressure relief completion condition comprises an operational time period of the external fan being greater than or equal to a second time period threshold, and/or a coil pressure being less than or equal to a second pressure threshold, and/or a rate of pressure drop of the coil being less than or equal to a rate threshold.
7. The defrosting control method as set forth in claim 1, wherein after exiting the defrosting mode when the second condition is satisfied, further comprising: and switching a defrosting exit condition from the second condition to the first condition.
8. A defrost control apparatus, characterized in that the defrost control apparatus comprises: The system comprises a parameter acquisition module, a target evaluation parameter acquisition module and a control module, wherein the parameter acquisition module is used for acquiring a target evaluation parameter after entering a defrosting mode, wherein the target evaluation parameter is used for evaluating defrosting load; the condition switching module is used for switching the defrosting exit condition from an initial first condition to a second condition when the target evaluation parameter indicates that the target evaluation parameter is in a load risk state currently, wherein the second condition is easier to trigger than the first condition; And the mode proposal module is used for exiting the defrosting mode when the second condition is met.
9. A computer readable storage medium, characterized in that a computer program is stored, which, when being executed by a processor, causes the processor to perform the steps of the method according to any of claims 1 to 7.
10. An air conditioner comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of the method of any one of claims 1 to 7.

Description

Defrosting control method, device, medium and air conditioner Technical Field The present invention relates to the field of air conditioning technologies, and in particular, to a defrosting control method, a defrosting control device, a medium and an air conditioner. Background The main current defrosting technology of the air conditioner adopts a reverse circulation defrosting method, namely, the four-way valve is switched to a refrigerating mode, and simultaneously, an outdoor fan is stopped to guide high-temperature refrigerant to directly flow through an outdoor heat exchanger so as to melt a frost layer. However, existing defrost exit control logic is mostly dependent on a fixed run length or preset tube temperature threshold. The mechanism is limited by the stiff setting of a fixed duration and the thermal hysteresis characteristics of the temperature sensor, and often causes a delay in the exit timing, so that the system is in an ineffective defrosting state in a part of time period, and the operation efficiency is reduced. Disclosure of Invention Based on the above, it is necessary to provide a defrosting control method, a defrosting control device, a medium and an air conditioner, so as to solve the problem that the existing defrosting technology has a delay of exit time, so that the system is in an ineffective defrosting state in a part of time period, and the operation efficiency is reduced. In a first aspect, an embodiment of the present application provides a defrosting control method, including: After entering a defrosting mode, acquiring target evaluation parameters, wherein the target evaluation parameters are used for evaluating defrosting loads; switching a defrost exit condition from an initial first condition to a second condition when the target evaluation parameter indicates that the load risk state is currently in, wherein the second condition is more easily triggered than the first condition; And when the second condition is met, exiting the defrosting mode. In some embodiments of the present application, the target evaluation parameters include a coil temperature, a temperature rise rate of the coil, and a suction side pressure of the compressor, and before the defrosting exit condition is switched from the initial first condition to the second condition, further comprising: And judging that the coil temperature is in a phase transition temperature monitoring interval and meets a third condition, and/or judging that the coil temperature is in a load risk state currently when the suction side pressure meets a fourth condition, wherein the third condition is that the temperature rising rate is greater than or equal to a rising rate value and the duration time is greater than a first time threshold, and the fourth condition is that the suction side pressure is greater than or equal to a first pressure threshold. In some embodiments of the application, the first condition is that the coil temperature is greater than or equal to a first temperature threshold and the second condition is that the coil temperature is greater than or equal to a second temperature threshold, wherein the second temperature threshold is less than the first temperature threshold. In some embodiments of the present application, the first condition is that the defrosting accumulation time period is greater than or equal to a first time period threshold, and the second condition is that the defrosting accumulation time period is greater than or equal to a second time period threshold, wherein the second time period threshold is smaller than the first time period threshold. In some embodiments of the present application, the exiting the defrost mode includes: and controlling the operation of the external fan until the decompression completion condition is met, and exiting the defrosting mode. In some embodiments of the application, the pressure relief completion condition includes the operational time period of the external fan being greater than or equal to a second time period threshold, and/or the coil pressure being less than or equal to a second pressure threshold, and/or the rate of pressure drop of the coil being less than or equal to a rate threshold. In some embodiments of the present application, after exiting the defrosting mode when the second condition is satisfied, the method further includes: and switching a defrosting exit condition from the second condition to the first condition. In a second aspect, an embodiment of the present application further provides a defrosting control device, including: The system comprises a parameter acquisition module, a target evaluation parameter acquisition module and a control module, wherein the parameter acquisition module is used for acquiring a target evaluation parameter after entering a defrosting mode, wherein the target evaluation parameter is used for evaluating defrosting load; the condition switching module is used for switching the defrosting exit condit