JPH09159256A - Blower control method for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform efficient operation of an air conditioner and a blower by a method wherein when the output of an air speed detecting means is increased to a value higher than some specified set value during operation of the blower, the blower is stopped. SOLUTION: During running of the blower of the outdoor machine of an air conditioner, an air speed is detected by an air speed detecting means 3 mounted in the vicinity of a heat exchanger 2. When a value of a detecting air speed is below some specified set value, ordinary operation is effected. However, when the detecting air speed is increased to a value higher than some specified set value, it is decided that strong wind flows and since sufficient heat-exchange by natural wind is carried out, a blower 1 is stopped. This constitution reduces a consumption power of an outdoor machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower control method for an air conditioner.

[0002]

2. Description of the Related Art A conventional blower control method for an outdoor unit of an air conditioner has been to control a blower to operate at a constant output or an output corresponding to an operating frequency of a compressor.

[0003]

However, in such a conventional control method, when a disturbance such as a strong wind occurs, the amount of air supplied to the heat exchanger is reduced or a loss occurs in the operation of the blower. There was a fear that

An object of the present invention is to efficiently operate the air conditioner and the blower by controlling the blower of the outdoor unit of the air conditioner according to the disturbance such as strong wind.

[0005]

In order to solve the above-mentioned problems, the present invention provides a heat exchanger, a blower for sending air to the heat exchanger, and a wind velocity of wind passing near the heat exchanger. And output the wind speed detecting means, the air volume calculating means for calculating and outputting the air volume passing through the heat exchanger from the wind speed detected by the wind speed detecting means, and detecting the wind direction of the wind passing near the heat exchanger. In the outdoor unit of the air conditioner having a wind direction detecting means for outputting and a blower control device for controlling the output of the blower, during operation of the blower, the output of the wind speed detecting means is larger than a certain set value. If so, it is determined that a strong wind is blowing, and the blower is stopped.

Further, when the output of the wind speed detecting means is continuously larger than a certain set value for a certain time or more during the operation of the blower, it is determined that a strong wind is blowing,
The blower is stopped.

Further, during the operation of the blower, the output of the blower is controlled so that the output of the air volume calculating means becomes constant according to the output value of the wind speed detecting means.

Further, the output of the blower is controlled according to the output value of the wind direction detecting means during the operation of the blower.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The operation of the above means is as follows.

The present invention detects the wind speed in the vicinity of the heat exchanger during operation of the blower of the outdoor unit of the air conditioner, and determines that strong wind is blowing when the wind speed exceeds a certain set value. However, power consumption can be reduced by stopping the blower.

Further, during operation of the blower, if the state where the wind speed is higher than a certain set value continues for a certain period of time or more, it is determined that strong wind is blowing, and the blower is stopped to prevent a wind gust or the like. Hunting of blower operation / stop due to momentary disturbance can be eliminated.

Further, by controlling the output of the blower so that the amount of air passing through the heat exchanger is constant during the operation of the blower, the air conditioner and the blower can be efficiently operated.

Further, while the blower is in operation, it is detected whether the wind passing through the heat exchanger is normal wind or reverse wind, and the control value for controlling the output of the blower is changed according to the wind direction to change the air conditioner and the blower. Can be operated efficiently.

[0014]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram of an outdoor unit of an air conditioner of the present invention. Reference numeral 1 is a blower, 2 is a heat exchanger, 3 is wind speed detection means, 4 is wind direction detection means, and 5 is an outdoor unit control section having an air volume calculation means and a blower control device. Here, the wind speed detecting means 3 is not particularly limited as long as it detects wind speed such as a wind speed sensor. Further, the wind direction detecting means 4 is not particularly limited as long as it can detect whether the wind direction is normal wind or reverse wind with respect to the blower.

Next, an actual operation example will be described based on the flowchart shown in FIG. As shown in FIG. 2, while the blower of the outdoor unit of the air conditioner is operating, the wind speed detecting means 3 attached near the heat exchanger detects the wind speed at that time (step 1). When the detected wind speed value is smaller than a certain set value, normal operation is performed (step 2). However, if the detected wind speed value exceeds a certain set value, it can be determined that strong wind is blowing, and heat exchange by natural wind can be sufficiently performed, so the blower can be stopped. Yes (step 3). As a result, the power consumption of the outdoor unit can be reduced.

A second embodiment of the present invention will be described based on the flowchart shown in FIG. As shown in FIG. 3, during the operation of the blower of the outdoor unit of the air conditioner, the wind speed detecting means 3 attached near the heat exchanger detects the wind speed at that time (step 1). When the detected wind speed value is smaller than a certain set value, the wind speed detection timer is cleared (step 2) and normal operation is performed (step 3). However, when the value of the detected wind speed is higher than a certain set value, the wind speed detection timer is counted (step 4), and when it continues for a certain time or more, it is determined that a strong wind is blowing, Stop the blower (step 5)
As a result, it is possible to eliminate the hunting for operating and stopping the blower due to a momentary disturbance such as a gust of wind.

A third embodiment of the present invention will be described based on the flowchart shown in FIG. As shown in FIG. 4, during operation of the blower of the outdoor unit of the air conditioner, the wind speed detecting means 3 attached near the heat exchanger detects the wind speed at that time (step 1). According to the detected value, the air volume calculation means calculates the air volume passing near the heat exchanger (step 2), and the air volume is made constant according to the wind speed detected by the wind speed detection means 3. By controlling the output of the blower (step 3), efficient operation can be performed. That is, when the air volume calculated by the air volume calculation means is less than the target air volume, in the direction of increasing the output of the blower, and when the calculated air volume is more than the target air volume, in the direction of decreasing the output of the blower, by controlling, respectively. The air volume calculated by the air volume calculation means is made constant.

A fourth embodiment of the present invention will be described based on the flowchart shown in FIG. As shown in FIG. 5, during the operation of the blower of the outdoor unit of the air conditioner, the wind direction detecting means 4 attached near the heat exchanger detects the wind direction of the wind being blown at that time (step 1). Next, it is detected whether the detected wind direction is normal or reverse to the blower (step 2). If the wind is normal, the amount of air supplied to the heat exchanger is supplied by the blower as shown in FIG. Since the amount of air flow is actually larger than the amount of air flow, the control is performed so as to decrease the output of the blower (step 3). Similarly, the wind direction detecting means 4
If the output is reverse wind, it will be a resistance to the blower, and the air volume actually supplied to the heat exchanger will be smaller than that in FIG. 6. Therefore, control is performed to increase the output of the blower (step 4), and Correct the shortfall. Thereby, the blower can be efficiently operated.

[0020]

As is apparent from the above embodiments, when the blower control system of the present invention is used, when strong wind blows during operation of the blower of the outdoor unit of the air conditioner, the blower is stopped to consume the air. Power can be reduced.

Further, by stopping the blower when a strong wind continues for a certain time or longer during the operation of the blower, it is possible to eliminate the hunting of the blower to start / stop due to a momentary disturbance such as a gust of wind.

Further, by controlling the output of the blower so that the amount of air passing through the heat exchanger is constant during the operation of the blower, the air conditioner and the blower can be operated efficiently.

Further, while the blower is in operation, it is detected whether the wind passing near the heat exchanger is normal wind or reverse wind, and the control value for controlling the output of the blower is changed according to the wind direction to change the air conditioner and the air conditioner. The blower can be operated efficiently.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an outdoor unit of an air conditioner according to first to fourth embodiments of the present invention.

FIG. 2 is a flowchart of blower control of the outdoor unit of the air conditioner according to the first embodiment of the present invention.

FIG. 3 is a flowchart of blower control of the outdoor unit of the air conditioner according to the second embodiment of the present invention.

FIG. 4 is a flowchart of blower control of an outdoor unit of an air conditioner according to a third embodiment of the present invention.

FIG. 5 is a flowchart of blower control of an outdoor unit of an air conditioner according to a fourth embodiment of the present invention.

FIG. 6 is a diagram showing the relationship between the wind direction, the air volume supplied to the heat exchanger, and the output of the blower

[Explanation of symbols]

 1 blower 2 heat exchanger 3 wind speed detection means 4 wind direction detection means 5 control device

Claims (4)

[Claims] 1. A heat exchanger, a blower for sending air to the heat exchanger, a wind speed detecting means for detecting and outputting a wind speed of wind passing near the heat exchanger, and a wind speed detecting means for detecting the wind speed. And an air volume calculating means for calculating and outputting the air volume passing through the heat exchanger from the wind speed, a wind direction detecting means for detecting and outputting the wind direction of the wind passing near the heat exchanger, and controlling the output of the blower. A blower control device is provided, and when the output of the wind speed detection unit becomes larger than a certain set value during operation of the blower, it is determined that strong wind is blowing, and the blower is stopped. Blower control method for air conditioner. 2. When the output of the wind speed detecting means is continuously larger than a certain set value for a certain period of time during the operation of the blower, it is judged that a strong wind is blowing and the blower is stopped. The blower control method for an air conditioner according to claim 1, 3. The output of the blower is controlled so that the output of the air volume calculating means becomes constant according to the output value of the wind speed detecting means during the operation of the blower. 2. The blower control method for an air conditioner according to 2. 4. The blower control method for an air conditioner according to claim 1, wherein the output of the blower is controlled in accordance with the output value of the wind direction detecting means while the blower is operating.