CN110542174B

CN110542174B - Defrosting method of air conditioner external unit, computer readable storage medium and air conditioner

Info

Publication number: CN110542174B
Application number: CN201910741689.6A
Authority: CN
Inventors: 黄允棋; 司徒姗姗; 范建波; 张世强
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-08-21
Anticipated expiration: 2039-08-12
Also published as: CN110542174A

Abstract

The invention provides a defrosting method of an air conditioner outdoor unit, a computer readable storage medium and an air conditioner, and the technical scheme of the invention dynamically adjusts relevant parameters of a defrosting mode according to an indoor temperature rise state, which is as follows: continuous detection of T_{Inner ring}And calculate T_{Inner ring}‑T_{Before time t of inner ring}If T is_{Inner ring}‑T_{Before time t of inner ring}≤△T_{Amplitude of inner ring temperature rise}The air conditioner enters a defrosting mode, wherein T_{Inner ring}Is the temperature, T, of the inner ring of the air conditioner_{Before time t of inner ring}Temperature before time T of inner loop of air conditioner, △ T_{Amplitude of inner ring temperature rise}The invention can optimize the defrosting mode in real time for the preset temperature value, solves the problems of short defrosting period of the air conditioner and frequent fluctuation of the indoor temperature, and achieves the beneficial technical effect of keeping the indoor temperature fluctuation smooth in the defrosting process.

Description

Defrosting method of air conditioner external unit, computer readable storage medium and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to a defrosting method of an air conditioner external unit, a computer readable storage medium and an air conditioner.

Background

In the heating operation process of the household split air conditioner, the outdoor unit is easy to generate frost at low temperature, and the system operation must be converted into a refrigeration mode after being operated for a period of time to heat and defrost the condenser. However, when defrosting is carried out, how to control defrosting time is a difficult problem, at present, defrosting modes are various, but only one defrosting mode is available on the same system, environmental characteristics and building characteristics of different regions are different, and defrosting rates, frost layer characteristics and room loads are different, so that a defrosting mode aiming at regional characteristics needs to be developed.

The existing defrosting mode air conditioner has short defrosting period, frequent indoor temperature fluctuation and insufficient optimization of a defrosting strategy.

Disclosure of Invention

The invention aims to provide a defrosting method of an air conditioner external unit, which is more optimized in defrosting strategy and smoother in temperature fluctuation. In order to achieve the aim, the technical scheme of the invention is as follows:

a defrosting method of an air conditioner outdoor unit controls the time of defrosting according to the temperature rise condition in a room, and specifically comprises the following steps: continuous detection of T_{Inner ring}And calculate T_{Inner ring}-T_{Before time t of inner ring}If T is_{Inner ring}-T_{Before time t of inner ring}≤△T_{Amplitude of inner ring temperature rise}The air conditioner enters a defrosting mode, wherein T_{Inner ring}Is the temperature, T, of the inner ring of the air conditioner_{Before time t of inner ring}Temperature before time T of inner loop of air conditioner, △ T_{Amplitude of inner ring temperature rise}Is a preset temperature value.

Preferably, if T_{Inner ring}-T_{Before time t of inner ring}>△T_{Amplitude of inner ring temperature rise}And the air conditioner heats.

Preferably, said detection T_{Inner ring}Before, the air conditioner is firstly put into a heating mode, then whether defrosting is needed is judged, and if defrosting is needed, T detection is started_{Inner ring}If defrosting is not required, T is not detected_{Inner ring}。

Preferably, after defrosting is finished, T is calculated_{Before defrosting by inner ring}-T_{At the end of defrosting of the inner ring}If T is_{Before defrosting by inner ring}-T_{At the end of defrosting of the inner ring}>△T_{Cooling for defrosting}Then △ T will be_{Amplitude of inner ring temperature rise}Increase T_{Increasing the temperature value}Then, the air conditioner is enabled to enter a heating mode,

wherein, T_{Before defrosting by inner ring}For adjusting the temperature, T, of the inner ring when entering defrost mode_{At the end of defrosting of the inner ring}To end the temperature of the inner ring of the air conditioner in defrost mode, △ T_{Cooling for defrosting}Is a temperature value, T_{Increasing the temperature value}Is a preset temperature value.

Preferably, said △ T_{Amplitude of inner ring temperature rise}And △ T_{Cooling for defrosting}The setting method comprises the following steps:

if T_{Outer ring}<T₁Then △ T_{Amplitude of inner ring temperature rise}Is A₁,△T_{Cooling for defrosting}Is X₁；

If T₁≤T_{Outer ring}<T₂Then △ T_{Amplitude of inner ring temperature rise}Is A₂,△T_{Cooling for defrosting}Is X₂；

If T₂≤T_{Outer ring}<T₃Then △ T_{Amplitude of inner ring temperature rise}Is A₃,△T_{Cooling for defrosting}Is X₃；

If T₃＜T_{Outer ring}Then △ T_{Amplitude of inner ring temperature rise}Is A₄,△T_{Cooling for defrosting}Is X₄；

Wherein A is₁≤A₂≤A₃≤A₄，X₁≤X₂≤X₃≤X_4，T₁<T₂<T₃<T_4，T_{Outer ring}For the temperature of the outer ring of the air conditioner_。

Preferably, whether the geographical position of the air conditioner is in a preset area or not is judged, if yes, the defrosting mode needs to be entered, and if not, the defrosting mode is shielded.

Preferably, the continuous heating time t of the air conditioner is synchronously calculated_{Duration of heating}If t is_{Duration of heating}>t_{Maximum defrosting period}Whether or not T_{Inner ring}-T_{Before 4min of inner ring}If the condition is met, defrosting is carried out; wherein, t_{Maximum defrosting period}Is a preset time value.

Preferably, said T is_{Increasing the temperature value}＝0.1℃。

A computer readable storage medium storing a computer program which, when invoked by a processor, implements the defrosting method described above.

An air conditioner comprising a processor and a memory, the memory storing a computer program which, when executed by the processor, implements the above described defrosting method.

Compared with the prior art, the defrosting method of the air conditioner outdoor unit has the beneficial technical effects that the related parameters of the defrosting mode are dynamically adjusted according to the indoor temperature rise state, and specifically the related parameters comprise: continuous detection of T_{Inner ring}And calculate T_{Inner ring}-T_{Before time t of inner ring}If T is_{Inner ring}-T_{Before time t of inner ring}≤△T_{Amplitude of inner ring temperature rise}The air conditioner enters a defrosting mode, wherein T_{Inner ring}Is the temperature, T, of the inner ring of the air conditioner_{Before time t of inner ring}Temperature before time T of inner loop of air conditioner, △ T_{Amplitude of inner ring temperature rise}The invention optimizes the defrosting mode in real time for the preset temperature value, solves the problems of short defrosting period of the air conditioner and frequent fluctuation of the indoor temperature, and achieves the beneficial technical effect of keeping the indoor temperature fluctuation smooth in the defrosting process.

Drawings

Fig. 1 is a flow chart of a defrosting mode of the present invention.

Detailed Description

In the north of Qinling mountain and Huaihe river in China, buildings in the area are mostly heat insulation structures, and the heat load is small, so that the heat demand can be met within a certain time even in the frosted state of an external machine; in addition, the wall body is not easy to heat up in the initial stage of starting the building with a thick wall body, and if the building enters defrosting quickly, the temperature drop of a room is larger under the action of wall body radiation, so that the defrosting period can be prolonged as much as possible by combining the temperature rise condition in the room.

As shown in FIG. 1, the defrosting process of the embodiment is as follows when △ T is detected_{Temperature difference of defrosting}When the defrosting condition is met, the system does not immediately enter defrosting, the temperature rise state of the inner ring is judged first, and the T is continuously detected and calculated_{Inner ring}-T_{Before time t of inner ring}When T is_{Inner ring}-T_{Before time t of inner ring}>△T_{Amplitude of inner ring temperature rise}When T is reached, the heating operation is continued, and_{inner ring}-T_{Before time t of inner ring}≤△T_{Amplitude of inner ring temperature rise}When the defrosting is finished, △ T is detected and calculated_{Cooling for defrosting}＝T_{Before defrosting by inner ring}-T_{At the end of defrosting of the inner ring}△ T_{Amplitude of inner ring temperature rise}Increase T_{Increasing the temperature value}When this value is greater than the A value at the corresponding outer ring in Table one, △ T will be assigned_{Amplitude of inner ring temperature rise}The temperature is increased by 0.1 ℃, and the operation is continued according to the method when defrosting is carried out next time.

Wherein, T_{Inner ring}Is the temperature, T, of the inner ring of the air conditioner_{Outer ring}Is the temperature, T, of the outer ring of the air conditioner_{Before time t of inner ring}The temperature of the inner loop of the air conditioner before time T, e.g. T4 min, T_{Before defrosting by inner ring}For adjusting the temperature, T, of the inner ring when entering defrost mode_{At the end of defrosting of the inner ring}To end the temperature of the inner ring of the air conditioner in defrost mode, △ T_{Amplitude of inner ring temperature rise}At a predetermined temperature value of △ T_{Cooling for defrosting}Is a temperature value, T_{Increasing the temperature value}Is a preset temperature value.

The △ T_{Amplitude of inner ring temperature rise}And △ T_{Cooling for defrosting}The setting method of (2) is shown in table one.

Table one:

wherein A is₁≤A₂≤A₃≤A₄，X₁≤X₂≤X₃≤X₄；T₁<T₂<T₃<T_4，T_{Outer ring}Is the temperature of the outer ring of the air conditioner.

In addition, in the defrosting mode, because the defrosting period is prolonged, the frost on the outer machine is thicker and thicker, and the damage to the fan blade and the compressor can be caused, so that the maximum time is required for limiting when △ T is used_{Temperature difference of defrosting}Meets the condition of entering defrosting and accumulates the running time t_{Duration of heating}>t_{Maximum defrosting period}When no matter T_{Inner ring}-T_{Before time t of inner ring}If the condition is met, the defrosting mode is immediately and directly entered.

The invention also selects different defrosting modes according to different regional characteristics, when the air conditioner is started to run in a heating mode, the identified region needs to be called out, if the identified region is a northern region, the following defrosting modes are activated, and if the identified region is other regions, the defrosting modes are shielded.

For example, the invention uses the wall-mounted air conditioner, when the air conditioner is started to heat, the installation area judged in the GPRS module is called out at first, if the area is the northern area, the defrosting mode based on the room temperature rise state is activated.

The first embodiment.

If A is a₁、A₂、A₃、A₄Respectively 0.8, 0.5, 0.2, 0.1, X₁、X₂、X₃、X₄2, 2, 2.5, 3. the defrosting method of the air conditioner external unit comprises that under the heating mode of the air conditioner, if the certain time is △ T_{Temperature difference of defrosting}Meets the condition of entering defrosting, and T is at the moment_{Outer ring}＝-3℃，T_{Inner ring}Start detection and calculate T at 20 ℃_{Inner ring}-T_{Before 4min of inner ring}If T is 4min later_{Inner ring}20.8 ℃, then T is present_{Inner ring}-T_{Before 4min of inner ring}＝0.8℃>Heating operation is continued at 0.2 ℃, then calculation is continued, if the time is 40min later, T_{Inner ring}＝24.6℃，T_{Before 4min of inner ring}24.4 deg.C, then T_{Inner ring}-T_{Before 4min of inner ring}Not satisfying 0.2 DEG C>0.2 deg.C, at which time the system begins to enter defrosting, if it exits defrosting time T_{Inner ring}20.8 ℃, △ T_{Cooling for defrosting}＝24.6-20.8＝3.8℃>2.5 ℃ then A₃＝A₃+ 0.1-0.3 deg.C, △ T for next defrosting_{Amplitude of inner ring temperature rise}And judging according to the updated result.

Example two.

The present embodiment provides a computer-readable storage medium for storing a computer program that implements the defrosting method according to the present invention when the computer program is called by a processor.

Example three.

The embodiment provides an air conditioner, which comprises a processor and a memory, wherein the memory stores a computer program, and the computer program realizes the defrosting method of the invention when being executed by the processor.

The above-mentioned embodiments are only used for understanding the technical solutions of the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that variations to those skilled in the art may be made without departing from the spirit of the invention, and these are within the scope of the invention.

Claims

1. A defrosting method of an air conditioner outdoor unit is characterized in that the time of entering defrosting is controlled according to the temperature rise condition in a room, and the defrosting method specifically comprises the following steps: continuous detection of T_{Inner ring}And calculate T_{Inner ring}-T_{Before time t of inner ring}If T is_{Inner ring}-T_{Before time t of inner ring}≤△T_{Amplitude of inner ring temperature rise}Then the air conditioner enters into defrosting mode, and after defrosting is finished, T is calculated_{Before defrosting by inner ring}-T_{At the end of defrosting of the inner ring}If T is_{Before defrosting by inner ring}-T_{At the end of defrosting of the inner ring}>△T_{Cooling for defrosting}Then △ T will be_{Amplitude of inner ring temperature rise}Increase T_{Increasing the temperature value}Then let the air conditioner enter into a heating mode, wherein T_{Inner ring}Is the temperature, T, of the inner ring of the air conditioner_{Before time t of inner ring}Temperature before time T of inner loop of air conditioner, △ T_{Amplitude of inner ring temperature rise}Is a preset temperature value, T_{Before defrosting by inner ring}For adjusting the temperature, T, of the inner ring when entering defrost mode_{At the end of defrosting of the inner ring}To end the temperature of the inner ring of the air conditioner in defrost mode, △ T_{Cooling for defrosting}Is a temperature value, T_{Increasing the temperature value}Is a preset temperature value.

2. A defrosting method according to claim 1 wherein if T is greater than T_{Inner ring}-T_{Before time t of inner ring}>△T_{Amplitude of inner ring temperature rise}And the air conditioner heats.

3. The defrosting method according to claim 1, wherein the detection T is_{Inner ring}Before, the air conditioner is firstly put into a heating mode, then whether defrosting is needed is judged, and if defrosting is needed, T detection is started_{Inner ring}If defrosting is not required, T is not detected_{Inner ring}。

4. The defrosting method of claim 1 wherein the △ T is_{Amplitude of inner ring temperature rise}And △ T_{Cooling for defrosting}Set method packageComprises the following steps:

Wherein A is₁≤A₂≤A₃≤A₄，X₁≤X₂≤X₃≤X₄，T₁<T₂<T₃<T₄，T_{Outer ring}Is the temperature of the outer ring of the air conditioner.

5. The defrosting method according to claim 3, wherein whether the geographical position of the air conditioner is in a preset area is judged, if yes, the defrosting mode needs to be entered, and if not, the defrosting mode is shielded.

6. The defrosting method according to claim 1, wherein the air conditioner continuous heating time t is synchronously calculated_{Duration of heating}If t is_{Duration of heating}>t_{Maximum defrosting period}Whether or not T_{Inner ring}-T_{Before 4min of inner ring}If the condition is met, defrosting is carried out; wherein, t_{Maximum defrosting period}Is a preset time value.

7. The defrosting method of claim 1 wherein T is T_{Increasing the temperature value}＝0.1℃。

8. A computer-readable storage medium storing a computer program, characterized in that: the computer program, when invoked by a processor, implements the defrosting method of any one of claims 1 to 7.

9. An air conditioner comprising a processor and a memory, wherein the memory stores a computer program which, when executed by the processor, implements the defrosting method of any one of claims 1 to 7.