KR101165039B1 - Ceiling mounted air conditioner and control method - Google Patents

Abstract

Disclosed are a ceiling mounted air conditioner and a control method thereof for setting a speed of an indoor unit blower motor according to an installation condition of an air conditioner.

The disclosed invention provides the maximum power to the blower motor after finishing the installation work on the air conditioner in the ceiling, and performs a plurality of speeds based on the maximum permissible speed of the motor smaller than the maximum speed of the motor at the maximum rated operation. The driving speed of the blower motor is set to be differentially set in response to the setting command.

Description

Ceiling Establishment Type Air-conditioner And Method For Controlling The Same

1A and 1B are diagrams illustrating an installation example of a ceiling-mounted air conditioner.

2 is an example of configuring a multi-air conditioner by connecting a plurality of indoor units to one outdoor unit.

3 is a control block diagram of an air conditioner according to the present invention.

4 is a graph showing the relationship between the static pressure, the motor speed, and the air volume according to the installation conditions.

5 is a flowchart illustrating a control method of an air conditioner according to the present invention.

Description of the Related Art [0002]

201: control unit

204: motor speed detection unit

206: trial run program storage unit

The present invention relates to a ceiling-mounted air conditioner for installing an air duct in a ceiling and a control method thereof, and more particularly to a ceiling-type air conditioner capable of performing air volume setting according to the installation condition of the air conditioner and its control. It is about a method.

The ceiling type air conditioner applies a structure in which an indoor unit and an air duct are installed in a ceiling of an indoor space.

Referring to FIG. 1A, the indoor unit 12a installed in the ceiling 11 is connected to the indoor space 10 through a discharge air duct 13a and an intake air duct 14a, and a discharge port provided at one side of the discharge air duct. The air heat-exchanged from the indoor unit is discharged to the indoor space through the 23a, and the indoor air is sucked through the suction port 24a provided on one side of the intake air duct. In FIG. 1B, as in FIG. 1A, the indoor unit 12b installed in the ceiling 11 is connected to the indoor space 10 through the discharge air duct 13b and the intake air duct 14b, and the discharge port 23b and the suction port are provided. Room air is discharged and sucked through 24b.

The amount of air supplied to the indoor space varies depending on the environmental conditions in which the air conditioner set made by the manufacturer is installed. One of the factors in which the air volume change occurs is that the static pressure determined by the size and shape of the air duct connecting the indoor unit and the indoor space is different. That is, in FIG. 1A, when the length of the air ducts 13a and 14a is crawled, the static pressure in the duct is high. Alternatively, when the length of the air ducts 13b and 14b is short, as in FIG. low.

In view of these problems, a technique has been developed to install the airflow sensor in the air duct and to control the speed of the blower based on the measurement result. The specific configuration is disclosed in Korean Patent Publication No. 2001-62961. This method has a burden of having an air volume detector.

Meanwhile, a configuration in which a user directly sets the air volume of an air conditioner according to an environment in which an air conditioner is installed is disclosed in Korean Patent Publication No. 2003-34645. In this method, the user adjusts the air volume change and measures whether it is actually occurring in the device set according to the set air volume, and accordingly, changes the phase trigger time of the motor so that the air volume is optimally output. At this time, it is inconvenient because the user directly manipulates and determines whether the air volume is optimal, resulting in an incorrect setting of the air volume.

The present invention has been made in view of the conventional technology as described above, and an object of the present invention is to simply and accurately set the air volume of the air conditioner by using a test run program for setting the driving speed for the indoor unit blower motor according to the installation conditions. To provide a ceiling-mounted air conditioner that can handle the and a control method thereof.

In order to achieve the above object, the present invention provides a ceiling-mounted air conditioner for installing an indoor unit and an air duct in a ceiling, comprising: a blower motor for blowing air to perform heat exchange in the indoor unit; A commissioning program storage unit for storing a commissioning program for commissioning the air conditioner; And when the air conditioner is commissioned according to the test run program, the motor is rated at the maximum speed with respect to the blower motor to check the maximum motor speed of the blower motor, and the static pressure applied to the air conditioner is determined based on the checked maximum motor speed. And a controller configured to set a driving speed for the blower motor in response to a user's speed setting command according to the maximum motor speed and the static pressure.

The apparatus may further include a memory configured to store information about a driving speed of the blower motor by the controller.

The controller drives the blower motor by searching for a motor driving speed already set in the memory during normal operation.

The controller provides maximum power to the blower motor during the maximum rated operation.

The control unit sets the motor allowable upper limit speed smaller than the motor maximum speed in the maximum rated operation, and sets the drive speed of the blower motor based on the motor allowable upper limit speed.

The static pressure at the motor allowable upper limit speed is less than the static pressure at the motor maximum speed.

The present invention for achieving the above object, in the control method of the ceiling-mounted air conditioner for installing the indoor unit and the air duct in the ceiling, using the test run program of the air conditioner to start the test run, when the test run Maximum rated operation with respect to the blower motor, check the maximum motor speed of the blower motor during the maximum rated operation, determine the static pressure applied to the air conditioner based on the checked maximum motor speed, and determine the maximum motor speed and the The driving speed for the blower motor is set in response to the user's speed setting command according to the static pressure.

Information about the driving speed of the blower motor is stored in a memory, and when the driving is normally performed, the drive speed of the blower motor is retrieved from the memory, and the blower motor is driven based on the search result.

The maximum motor speed of the blower motor is detected in an equilibrium state where the motor speed is kept constant.

The driving speed of the blower motor is set based on a motor allowable speed smaller than the maximum motor speed.

When there are a plurality of speed setting commands of the user, the driving speed of the blower motor is differentially set in response to the speed setting command.

Hereinafter, the embodiment according to the present invention will be described in detail.

As shown in FIG. 2, the ceiling-mounted air conditioner according to the present invention includes a multi-air conditioner for connecting a plurality of indoor units 100-1, 100-2, and 100 -N to one outdoor unit 100. Apply. Here, the indoor unit has an installation structure that is installed in the ceiling and connected to the indoor space through an air duct, for which reference is made to FIGS. 1A and 1B described above.

In addition, the present invention can also be applied to an air conditioner connecting one indoor unit to one outdoor unit.

3 is a control block diagram of an air conditioner, wherein the ceiling type air conditioner includes a control unit 201 for controlling overall operation. The air conditioner also includes a motor driver 202 for driving the blower motor 203, a motor speed detector 204 for detecting the speed of the blower motor, a memory 205 for storing data for driving the air conditioner, and The receiver 200 receives a driving command of the remote controller 101.

The motor speed (RPM), the static pressure, and the air volume have different relations according to the structure in which the air conditioner is installed, and the example is as shown in the graph of FIG. Therefore, it is necessary to set the speed of the blower motor in consideration of the installation condition of the air conditioner to properly exhibit the original performance of the air conditioner. In other words, by controlling the driving speed of the blower motor in response to a user's air volume setting command (for example, strong wind, middle wind, and weak wind), the actual air volume discharged to the room becomes appropriate.

After the air conditioner is installed, the power is supplied to enter into a state where commissioning can be performed. The user remotely transmits a test run command using the remote controller 101. The receiver 200 receives a test operation command and transmits it to the controller 201. When a user receives a test run command, the control unit 201 starts a test run using a test run program stored in the test run program storage unit 206.

The control unit 201 performs a predetermined maximum rated operation with respect to the air conditioner. Here, the maximum rated operation is to supply the maximum power to the motor by controlling the motor driving unit 202 to drive the blowing motor at the maximum speed SXr. For example, full power for 220V AC power is applied to the motor. At this time, it is checked whether the motor speed detected through the motor speed detection unit 204 becomes equilibrium. Here, the equilibrium of the motor speed means a state in which the maximum motor speed is maintained at a constant speed.

When the equilibrium of the motor speed is reached, the control unit 201 retrieves the static pressure corresponding to the maximum motor speed and the air volume in the table 1 (T100) prepared in advance in the memory 205. Table 1 (T100) prepares a predetermined air volume and static pressure according to the spec of the air conditioner in correspondence with the motor speed. Here, the maximum motor speed is obtained by sensing through the motor speed sensor, and the air volume is determined by the specifications of the air conditioner inherently, and is determined in advance by the maximum motor speed.

(T100)

When the motor speed balance is performed at 1150 RPM as shown in A1 of FIG. 4, the 10 air volume CMM is determined by the maximum motor speed 1150 RPM, and the static pressure is 4 mmAq.

In the case of normal operation, it is advantageous for stable operation to apply the relaxed operating conditions rather than the maximum rated operation. In this case, the motor allowable upper limit speed SPr smaller than the motor maximum speed SXr is set, and the motor drive speed SDr corresponding to the user's speed setting command in a range not exceeding the motor allowable upper limit SPr. Set each). When the conditions more relaxed than the maximum rated operation are determined in this way, the table 2 (T200) prepared in advance in the memory 205 is searched.

(T200) 10 air volume (CMM)

When the motor maximum speed SXr is 1150, the motor allowable upper limit speed SPr is set to 1050 smaller than that. For example, as in B1 of FIG. 4, in normal operation, the motor allowable upper limit speed is 1050 and the static pressure is 3 mmAq.

The control unit 201 sets the motor driving speed corresponding to the speed setting command "strong wind" to AA (where AA is less than a 1050 a) (where a is a positive number) and sets the motor driving speed corresponding to the speed setting command "heavy wind". Determine BB (where BB is less than AA) (where b is a positive number) and set the motor drive speed corresponding to the speed setting command "weak" to CC (where CC is less than BB).

The information on the drive speed of the blower motor thus set is stored in the memory 205. Then, when a user inputs a speed setting command during normal operation of the air conditioner, the user searches for information stored in the memory 205 and drives the blower motor according to the driving speed of the blower motor that matches the installation condition of the air conditioner. To be discharged.

Hereinafter, a control method of an air conditioner according to the present invention will be described.

After completing the installation of the air conditioner, including the installation of the indoor unit and the air duct in the ceiling, the power is applied, and the air conditioner can be commissioned (300).

The user inputs a test run command to the device set using the remote controller 101. When the trial run command is received through the receiver 200, the controller 201 reads the trial run program from the trial run program storage 206 and starts trial run (302). In this case, the control unit 201 drives the blower motor 203 by controlling the motor driving unit 202 to perform the maximum rated operation. As the speed of the blower motor 203 increases, the static pressure of the air duct also increases (304).

During the maximum motor rated operation, the controller 201 determines whether the motor speed is balanced according to the motor speed detected by the motor speed detector 204 (306). If the motor speed is balanced, check the maximum motor speed (SXr) at that time (308), and search the table 1 (T100) for the static pressure corresponding to the checked motor maximum speed (SXr) and the air volume inherent in the air conditioner. (310).

 The control unit 201 searches Table 2 (T200) to set the motor allowable upper limit speed SPr smaller than the maximum motor speed (312), and based on the motor allowable upper limit speed SPr, the user sets a speed setting command ( The driving speeds of the blowing motors corresponding to the strong winds, the heavy winds, and the weak winds, respectively, are differentially set (314).

The control unit 201 stores in the memory 205 information on the driving speed of the blower motor which is differentially set (316), and then ends the trial run (318).

 After the trial run, when the operation command of the air conditioner is input, normal operation starts (320). At this time, the input of the speed setting command of the user is determined (322), and the driving speed of the blower motor corresponding to the input speed setting command is retrieved from the memory 205 (324). The motor driving unit 202 is controlled according to the found drive speed of the blower motor to drive the blower motor 203 (326). Thereafter, it is determined whether a stop command is input (328). When the stop command is input, the blower motor 203 is stopped to end the air conditioner operation (330).

According to the present invention as described above, when the air conditioner is installed in the ceiling and then commissioned according to the test run program, the maximum rated operation of the blower motor is performed to check the maximum speed of the blower motor, and the checked maximum speed of the motor. Based on this, the static pressure applied to the air conditioner is determined, and then the driving speed for the blower motor is set in response to the user's speed setting command based on the motor allowable upper limit speed smaller than the maximum motor speed.

The present invention does not need to add a separate configuration because the driving speed of the blower motor is set during the trial run, and the speed setting process of the blower motor is conveniently and accurately performed.

Claims (11)

In the ceiling-mounted air conditioner that installs the indoor unit and the air duct in the ceiling, A blowing motor for blowing air to perform heat exchange in the indoor unit; A commissioning program storage unit for storing a commissioning program for commissioning the air conditioner; And When the air conditioner is commissioned according to the test run program, the motor is rated at the maximum speed with respect to the blower motor to check the maximum motor speed of the blower motor, and the static pressure applied to the air conditioner is determined based on the checked maximum motor speed. And a controller configured to set a driving speed for the blower motor in response to a user's speed setting command according to the maximum motor speed and the static pressure. The ceiling-mounted air conditioner of claim 1, further comprising a memory configured to store, by the controller, information on a driving speed of the blower motor. The ceiling-mounted air conditioner according to claim 2, wherein the controller drives the blower motor by searching for a motor driving speed already set in the memory during normal operation. The ceiling mounted air conditioner according to claim 1, wherein the control unit provides a maximum power to the blower motor during the maximum rated operation. The ceiling according to claim 4, wherein the control unit sets a motor allowable upper limit speed smaller than the motor maximum speed in the maximum rated operation, and sets a drive speed of the blower motor based on the motor allowable upper limit speed. Air conditioner installed. 6. The ceiling mounted air conditioner according to claim 5, wherein the static pressure at the maximum motor speed is less than the static pressure at the maximum motor speed. In the control method of the ceiling-mounted air conditioner for installing the indoor unit and the air duct in the ceiling, Start a test run using the test run program of the air conditioner, In the case of the trial run, the maximum rated operation with respect to the blower motor, Check the maximum motor speed of the blower motor during the maximum rated operation, Determining the static pressure applied to the air conditioner based on the checked maximum motor speed, And a driving speed for the blower motor in response to a user's speed setting command according to the maximum motor speed and the static pressure. The method of claim 7, wherein the driving speed of the blower motor is stored in a memory, and if the driving speed of the blower motor is found in a normal operation, the drive speed of the blower motor is retrieved from the memory, and the blower motor is driven based on the search result. Control method of the ceiling-mounted air conditioner characterized in that. The method of claim 7, wherein the maximum speed of the motor of the blower motor is detected in an equilibrium state in which the motor speed is kept constant. The control method of the ceiling type air conditioner according to claim 7, wherein the driving speed of the blower motor is set based on a motor allowable speed smaller than the maximum motor speed. The control method of the ceiling-mounted air conditioner according to claim 10, wherein the driving speed of the blower motor is set to be differentially set in response to the speed setting command when the speed setting command of the user is plural.

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