CN112682901B

CN112682901B - Control method of variable frequency air conditioner with humidity sensor

Info

Publication number: CN112682901B
Application number: CN202011562853.6A
Authority: CN
Inventors: 杨涛; 王波; 普江朋; 王金龙; 王平; 刘丹
Original assignee: Sichuan Changhong Air Conditioner Co Ltd
Current assignee: Sichuan Changhong Air Conditioner Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2022-05-27
Anticipated expiration: 2040-12-25
Also published as: CN112682901A

Abstract

The invention relates to the field of air conditioners, in particular to a control method of a variable frequency air conditioner with a humidity sensor. The invention is suitable for the variable frequency air conditioner with the humidity sensor.

Description

Control method of variable frequency air conditioner with humidity sensor

Technical Field

The invention relates to the field of air conditioners, in particular to a control method of a variable frequency air conditioner with a humidity sensor.

Background

During the air conditioner refrigeration, can be less than air dew point temperature because evaporating temperature and form the condensation water, when air relative humidity is great, if evaporating temperature crosses lowly can lead to air conditioner external structure surface to form a large amount of condensation water, the time will slide down or drip for a long time, directly blows off from the air conditioner air outlet even, uses for the air conditioner and brings the potential safety hazard, influences consumer's subjective impression simultaneously. At present, in order to avoid the situation, the frequency of an air conditioner compressor is generally limited and the wind speed is increased when the relative humidity is higher, and the problem is solved by increasing the evaporation temperature to reduce condensation or even not condense the condensation. However, the problem with this approach is that limiting the frequency affects the cooling capacity of the air conditioner and does not achieve the room temperature desired by the consumer; improve the wind speed and can increase the noise on the one hand, on the other hand wind speed increases and can let evaporating temperature continue to rise, and the air-out temperature behind the heat exchanger of air also can correspondingly rise simultaneously, and this body sense that can give the consumer brings uncomfortable impression.

Disclosure of Invention

The technical problems solved by the invention are as follows: the control method of the variable frequency air conditioner with the humidity sensor solves the problem that condensed water is generated when the relative humidity of air of the variable frequency air conditioner is high.

The invention adopts the technical scheme for solving the technical problems that: the control method of the variable frequency air conditioner with the humidity sensor comprises the following steps:

s01, after the variable frequency air conditioner is started to operate, judging whether to enter refrigeration operation, if not, operating according to other modes; if yes, go to step S02;

s02, judging whether the relative humidity is greater than A% and lasting for B minutes;

s03, if yes, go to step S04; otherwise, the maximum operation frequency of the compressor is subjected to relevant control according to the relative humidity condition;

s04, judging whether the wind speed of the indoor unit is low wind or below, if not, the swing angle of the indoor unit is not changed, and if so, entering the step S05;

s05, performing correlation control on the inner machine swing blade angle according to the relative humidity condition;

and S06, judging whether the relative humidity is less than C%, if not, returning to the step S05, and if so, recovering the swing blade angle to the original set angle.

Further, in steps S04 to S06, the maximum operating frequency of the compressor is defined as E if the inner set louver angle is smaller than D, and is defined as F if the inner set louver angle is larger than D.

Furthermore, E is more than or equal to 25Hz and less than or equal to 35Hz, F is more than or equal to 45Hz and less than or equal to 55Hz, and D is more than or equal to 5 and less than or equal to 15.

Further, in step S02, A is more than or equal to 60 and less than or equal to 80, and B is more than or equal to 10 and less than or equal to 60.

Further, in step S03, the control relationship between the maximum operating frequency of the compressor and the relative humidity condition is: maximum frequency E + (a-current detected relative humidity 100), E is the set frequency.

Further, in step S05, the control relationship between the inner swing angle and the relative humidity condition is: the swing angle is the set angle + the current detected relative humidity 100-A.

Further, in step S06, the range of C is: c is more than or equal to 60 and less than or equal to 70.

The invention has the beneficial effects that: according to the control method of the variable frequency air conditioner with the humidity sensor, the circulating air quantity is controlled by adjusting the air outlet angle of the swing blade of the inner machine and the air outlet temperature is controlled by adjusting the maximum operation frequency of the outdoor compressor on the basis of not changing the set air speed of the inner machine according to the change of indoor relative humidity, the problem that the variable frequency air conditioner generates condensed water when the relative humidity of air is high is solved while the system performance is considered, the refrigeration reliability and comfort of the variable frequency air conditioner are improved, and the comfort of a user is improved.

Drawings

FIG. 1 is a schematic control flow diagram of an embodiment of a method for controlling a variable frequency air conditioner with a humidity sensor according to the present invention.

Detailed Description

The control method of the variable frequency air conditioner with the humidity sensor controls the circulating air quantity and the air outlet temperature by adjusting the air outlet angle of the swing blade of the inner machine and adjusting the maximum operation frequency of the outdoor compressor on the basis of not changing the set air speed of the inner machine according to the change of the indoor relative humidity, and solves the problem that the variable frequency air conditioner generates condensed water when the relative humidity of the air is higher while considering the system performance, and comprises the following steps:

s03, if the relative humidity is more than A% and lasts for B minutes, entering the step S04; if the relative humidity is less than A% or the duration time does not meet B minutes, performing relevant control on the maximum operation frequency of the compressor according to the relative humidity condition;

s05, performing correlation control on the inner machine swing blade angle according to the relative humidity condition: setting the swing angle as a set angle + current detected relative humidity 100-A;

s06, judging whether the relative humidity is less than C%, if not, returning to the step S05, if so, returning the swing blade angle to the original set angle.

Example (b):

this embodiment is exemplified by a being 75, B being 30, C being 65, D being 10, E being 30, and F being 50, as shown in fig. 1.

The first step is as follows: the air conditioner is started, the working mode of the air conditioner is judged, if the air conditioner is not in the refrigeration mode, the air conditioner operates according to the original mode, and if the air conditioner is in the refrigeration mode, the second step is carried out;

the second step is that: judging whether the relative humidity is more than 75% or not and operating for 30 minutes;

the third step is: if the relative humidity is more than 75% and the operation is carried out for 30 minutes, entering a fourth step; if not, according to the formula: limiting the maximum frequency of the air conditioner by the maximum frequency E + (A-100 of the current detected relative humidity), and properly reducing the frequency of the air conditioner compressor on the premise of considering the system performance;

the fourth step: judging whether the wind speed of the indoor unit is low or below, if not, keeping the swing angle unchanged, and if so, entering the fifth step;

the fifth step: the control relation of the swing blade angle is as follows: the swing blade angle is the set angle plus the current detected relative humidity 100-75, and the swing blade angle is controlled according to the relative humidity so as to control the circulating air quantity and avoid condensation;

and a sixth step: judging whether the relative humidity is less than 65%, returning to the fifth step if the relative humidity is greater than or equal to 65%, and returning the swing blade angle to the original set angle if the relative humidity is less than 65%;

the process from the first step to the fourth step is to judge whether the environment is easy to generate condensation when the air conditioner is refrigerating, namely the condensation is easy to generate under the condition that the relative humidity is higher and the air outlet speed is low, and the fifth step is to establish the relation between the swing blade angle and the relative humidity under the condition that the relative humidity is high and the air outlet speed is low, wherein the higher the relative humidity is, the larger the swing blade angle is, and the more the circulating air volume is.

And in the process from the fourth step to the sixth step, monitoring the swing blade angle in real time, setting the maximum frequency of the compressor to be 30Hz if the swing blade angle is smaller than 10, and setting the maximum frequency of the compressor to be 50Hz if the swing blade angle is larger than or equal to 10, wherein the condensation is avoided by combining the circulating air volume and the air outlet temperature.

Claims

1. The control method of the variable frequency air conditioner with the humidity sensor is characterized by comprising the following steps:

s05, performing correlation control on the inner machine swing blade angle according to the relative humidity condition, wherein the correlation control relation between the inner machine swing blade angle and the relative humidity condition is as follows: the swing blade angle = set angle + current detected relative humidity 100-a;

2. The method of claim 1, wherein in steps S04 to S06, if the inner set swing blade angle is smaller than D, the maximum operating frequency of the compressor is limited to E, and if the inner set swing blade angle is larger than D, the maximum operating frequency of the compressor is limited to F.

3. The method for controlling the inverter air conditioner with the humidity sensor according to claim 1 or 2, wherein in step S03, the control relationship between the maximum operation frequency of the compressor and the relative humidity condition is as follows: maximum frequency = E + (a-currently detected relative humidity 100), E being the set frequency.

4. The method for controlling the inverter air conditioner with the humidity sensor as claimed in claim 1 or 2, wherein in step S02, A is more than or equal to 60 and less than or equal to 80.

5. The method for controlling the inverter air conditioner with the humidity sensor as claimed in claim 1 or 2, wherein in step S02, B is more than or equal to 10 and less than or equal to 60.

6. The method for controlling the inverter air conditioner with the humidity sensor as claimed in claim 1 or 2, wherein in step S06, C is more than or equal to 60 and less than or equal to 70.

7. The method for controlling the inverter air conditioner with the humidity sensor as claimed in claim 2, wherein D is more than or equal to 5 and less than or equal to 15.

8. The method for controlling the inverter air conditioner with humidity sensor according to claim 2, wherein E is more than or equal to 25Hz and less than or equal to 35 Hz.

9. The method for controlling the inverter air conditioner with humidity sensor according to claim 2, wherein F is greater than or equal to 45Hz and less than or equal to 55 Hz.