KR20140016543A - Apparatus and method for controlling heat protection motor of compressor in cooling appliance - Google Patents

Abstract

The present invention provides a more efficient heat dissipation by applying a BLDC fan motor capable of variable speed of rotation RPM in the machine room in which the compressor of the cooling machine is installed, and actively changing the rotation RPM of the BLDC fan motor according to the change of the outside temperature and the inside temperature of the machine room. Provided are a radiating motor control apparatus and a method for controlling a compressor for a cooling machine to perform a function.
To this end, the present invention is a machine room in which a compressor of the cooling device is installed by rotating a heat radiating fan at a rotational speed of a different rotation RPM according to an outside temperature sensor sensing an outside temperature of the outside of the cooling device and an outside temperature detected by the outside temperature sensor. The variable speed fan motor for performing an internal heat dissipation operation, the variable speed fan motor is driven to operate at any one of the lower rotation RPM or higher rotation RPM by the variable speed drive control of the control unit according to the sensing temperature of the outside temperature sensor. The variable speed fan according to a motor driving unit and whether the outside air temperature sensed by the outside air temperature sensor is less than a first outside air temperature, exceeds a second outside air temperature, and is within a first outside air temperature to a second outside air temperature range. Run the motor at either low speed or high speed RPM It characterized in that it comprises a control unit for controlling the lock of the motor drive unit.

Description

Apparatus and Method for Controlling Heat Protection Motor of Compressor in Cooling Appliance}

The present invention relates to a heat radiating motor control apparatus and method of the compressor for a cooling device, and more particularly, to a rotation for a heat radiating BLDC fan motor (Brushless DC Fan Motor) inside a machine room in which a compressor of a cooling device is installed. The present invention relates to a heat radiating motor control apparatus for a compressor for a cooling machine and a method thereof, which allow a speed (RPM; hereinafter referred to as a rotational RPM) to be changed according to temperature change.

Generally, a compressor is installed in a cooling device such as a refrigerator or a kimchi refrigerator to convert a refrigerant required for cooling the device into a gas by compressing the refrigerant at a high pressure, and such a compressor passes through a heat exchange chamber such as a refrigerating chamber. When it is changed to a gas of low pressure, it compresses it to high pressure and delivers it to the condenser.

In this process, the compressor generates high heat according to the operation of the motor for compressing the refrigerant. When the temperature of the compressor reaches 120 ° C. or more, the compressor is overheated and the compressor must be stopped. Since the compressor can be shut down due to the overall equipment reliability of the refrigeration unit, the inside of the machine room of the refrigeration unit in which the compressor is installed lowers the heat generated from the compressor. There is a need to prevent malfunctions due to high temperatures of other accessory devices installed therein or shutdown of the compressor.

For this heat dissipation function, a heat dissipation fan motor is installed in the machine room of the refrigerating device to lower the high heat generated from the compressor. Typically, the heat dissipation fan motor is an AC that operates in interlocked rotation according to the operation of the compressor. The fan motor is applied.

The AC fan motor is configured to continuously rotate the heat dissipation fan at a constant speed RPM, such as 1,100 RPM, when the compressor inside the machine room operates.

Related arts include Korean Laid-Open Patent No. 2012-0042471 (BLDC motor control device) (2012.05.03).

However, in the case of a heat dissipation AC fan motor installed in a conventional machine room for a refrigeration appliance, a constant rotational RPM that is invariant in speed according to a constant AC voltage supplied regardless of the internal temperature and the external temperature of the machine room. That is, since the rotational drive is continuously performed at 1,100 RPM, even if the temperature of the compressor fluctuates according to the external temperature change around the refrigerator or the load change inside the refrigerator, the rotational speed is changed for effective heat dissipation in response to the temperature change. There is a problem that this is impossible.

Moreover, in order to change the rotational speed of the AC fan motor in response to the temperature fluctuation of the compressor, a problem arises in that a significant replacement of the relevant drive circuits necessary for driving the fan motor and relocation of peripheral devices are considered.

Therefore, the present invention has been made to improve the above-mentioned conventional problems, applying a BLDC fan motor capable of variable speed of rotation RPM inside the machine room in which the compressor of the cooling machine is installed, and the BLDC according to the change in the outside air temperature and the machine room temperature It is an object of the present invention to provide an apparatus and method for controlling a heat radiating motor of a compressor for a cooling machine, by actively changing a rotation RPM of a fan motor, thereby enabling a more efficient heat radiating function to be performed.

Heat dissipation motor control device of the compressor for a cooling machine according to an aspect of the present invention, the heat radiation at the rotational speed of each different rotation RPM according to the ambient air temperature sensor for detecting the outside air temperature outside the cooling machine, the outside air temperature detected by the outside air temperature sensor The variable speed fan motor rotates a fan to perform a heat dissipation operation in a machine room in which a compressor of the cooling machine is installed, and the variable speed fan motor is rotated at a lower rotation RPM or higher by a variable speed drive control of a controller according to a sensed temperature of the outside temperature sensor. The motor driving unit which is driven to operate at any one rotational speed among RPM, and whether the outside air temperature sensed by the outside air temperature sensor is below the first outside air temperature, above the second outside air temperature, and between the first outside air temperature and the second The variable speed fan motor may be rotated at a lower rotational speed or higher depending on whether it is within an outside temperature range. It characterized in that it comprises a control unit for controlling the motor drive unit to operate at any one rotational speed of the rotation RPM.

In the present invention, the variable speed fan motor is characterized in that the BLDC (Blushless DC) fan motor that operates by varying the rotation speed at a lower rotation RPM and a higher rotation RPM.

The controller may control the variable speed fan motor to operate at a rotation speed of a lower rotation RPM when the outside air temperature detected by the outside air temperature sensor is less than a first outside temperature. When the outside air temperature is within the first outside temperature to the second outside air temperature range, the variable speed fan motor at a rotation RPM before detecting the first outside air temperature within the second outside air temperature range is controlled. It characterized in that the control to maintain the rotational speed.

In addition, the lower rotation RPM of the variable speed fan motor is 1270 RPM, the upper rotation RPM is 1500 RPM, characterized in that the first outside air temperature determined by the control unit is 36 ℃, the second outside air temperature is 38 ℃. .

The present invention may further include a machine room temperature sensor configured to detect a temperature inside the machine room of the cooling device, and wherein the control unit rotates the variable speed fan motor when the bet temperature detected by the machine room temperature sensor exceeds a preset value. It characterized in that the control to operate at the rotational speed of the RPM.

According to another aspect of the present invention, there is provided a method of controlling a heat radiating motor of a machine room for a cooling machine, the first step of sensing an outside air temperature by an outside air temperature sensor installed outside the cooling machine, and the control unit detecting the outside air temperature by the first outside air. A second step of determining whether it is less than a temperature, exceeds a second outside temperature, and is within a range of a first outside temperature to a second outside temperature, and the control unit determines the cooling according to the determination result of the second step. A third step of generating a variable speed control signal for controlling the variable speed fan motor in the machine room in which the compressor of the device is installed at one of the lower rotation RPM and the upper rotation RPM, and the motor driving unit generating the variable speed control signal of the controller; According to the present invention, the variable speed fan motor may be configured to operate at any one of a lower rotation RPM and an upper rotation RPM. And in that it comprises a fourth step according to claim.

In the third step, if the outside air temperature detected by the outside air temperature sensor is less than the first outside air temperature, controlling the variable speed fan motor to operate at a rotational speed of the lower rotation RPM, sensing from the outside air temperature sensor And controlling the variable speed fan motor to operate at a rotational speed of a higher rotational RPM when the outside air temperature becomes higher than the second outside air temperature.

In the third step, if the outside air temperature detected by the outside air temperature sensor is within the first outside temperature to the second outside temperature range, the variable speed fan motor is within the first outside temperature to the second outside temperature range And controlling to maintain the rotational speed at the rotational RPM before sensing.

In addition, in the fourth step, the motor driving unit drives the BLDC fan motor as the variable speed fan motor so as to operate by varying the rotation speed at a lower rotation RPM and an upper rotation RPM.

Further, in the fourth step, the lower rotational RPM of the variable speed fan motor is 1270 RPM, the upper rotational RPM is 1500 RPM, the first outside air temperature determined by the control unit is 36 ℃, the second outside air temperature is 38 It is characterized by the above-mentioned.

According to the present invention made as described above, a BLDC fan motor capable of variable speed of rotation RPM is installed in the machine room in which the compressor of the refrigerating machine is installed, and rotates according to a certain outside air temperature range of the refrigerating machine and the internal temperature of the machine room. By changing the RPM, it is possible to change the rotation RPM of the heat radiating fan according to the change in the temperature of the compressor according to the change in the external temperature of the cooling device and the load change of the device, it is possible to perform a more efficient heat dissipation function, In particular, when the temperature is lowered, it is possible to operate by lowering the rotation RPM of the fan motor, thereby reducing power consumption.

1 is a view showing the configuration of a heat radiating motor control apparatus of a compressor for a cooling apparatus according to an embodiment of the present invention.
2 is a view showing a state in which the rotation RPM of the BLDC fan motor is determined according to the outside temperature in the radiator motor control apparatus of the compressor for a cooling apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating an operation of a method of controlling a heat radiating motor of a machine room for a cooling machine according to an embodiment of the present invention.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a view showing the configuration of a heat radiating motor control apparatus of a compressor for a cooling apparatus according to an embodiment of the present invention, Figure 2 is according to the ambient temperature in the heat radiating motor control apparatus of the compressor for a cooling apparatus according to an embodiment of the present invention The figure which shows the state in which the rotation RPM of a BLDC fan motor is determined.

As shown in FIG. 1, the heat radiating motor control apparatus of the compressor for a cooling apparatus according to the present invention includes a power supply circuit unit 10, a motor driving unit 20, a BLDC fan motor 30, a heat radiating fan 40, and a machine room temperature. The sensor 50, the outside temperature sensor 60, the memory 70, the controller 80, the compressor 100, and the refrigerant pipe 110 are included.

The motor driver 20 may vary the rotation speed of the BLDC fan motor 30 based on the rotation detection signal fed back from the BLDC fan motor 30 according to the shift control from the controller 80. As to perform the driving, it includes a reference signal generator 22 and a motor driving circuit 24.

The reference signal generator 22 receives a three-phase rotation detection signal fed back from the BLDC fan motor 30 so that the driving signals of U, V, and W three phases are constantly generated without being affected by temperature. The three-phase reference signals SU, SV, and SW are generated.

The motor driving circuit 24 supplies the three-phase driving signals U, V, and W to the BLDC fan motor based on the three-phase reference signals SU, SV, and SW from the reference signal generator 22. 30 to generate a driving signal for varying the rotation RPM of the BLDC fan motor 30 according to the shift control signal from the controller 80.

Here, a drive signal for varying the rotation RPM generated by the motor drive circuit 24, a signal for controlling the drive so that the BLDC fan motor 30 is rotated to any one rotation RPM of 1270 RPM or 1500 RPM Corresponds to

Meanwhile, in one embodiment of the present invention, the rotational RPM of the BLDC fan motor 30 is limited to 1270 RPM and 1500 RPM, but the present invention is not limited thereto. It is also possible to apply a BLDC fan motor that can rotate at rotation speed.

The BLDC fan motor 30 is rotated to a variable speed state by a drive signal to which the rotation shift from the motor driver 20 is applied to rotate the heat radiating fan 40 at high speed, and detects a rotation speed of the motor. To provide the reference signal generator 22 of the motor driving unit 20 as a feedback signal, which is a three-phase coil 32, a rotor 34, and first to third rotations of the three phases. Detection sensors 36a, 36b, 36c.

The three-phase coil 32 of the BLDC fan motor 30 is provided on the stator side of the motor, and the three-phase driving signals U, V, generated from the motor driving circuit 24 of the motor driving unit 20. W) is applied and current flows in three phases of the U phase, the V phase, and the W phase, respectively, and the rotor 34 is provided with alternating permanent magnets of the north pole and the south pole along the circular core. The magnetic field is generated by the current applied to each of the three phases of the three-phase coil 32 on the stator side to rotate at high speed, and the first to third rotation detection sensors 36a, 36b, and 36c are rotated at the same time. Disposed around the electrons 34 to generate three rotation detection signals each having a phase difference of 120 ° according to the rotation of the rotor 34 to the reference signal generator 22 of the motor driver 20. to provide.

 Here, the first to third rotation detection sensors (36a, 36b, 36c) is preferably made of a Hall sensor (Hall Sensor) for detecting the intensity of the magnetic field generated by the permanent magnet installed in the rotor 34, respectively Do.

The heat dissipation fan 40 is installed to face the compressor 100 disposed inside the machine room in a state in which it is fixed to the motor rotation shaft of the BLDC fan motor 30, and interlocked with the rotation of the motor rotation shaft. While rotating at high speed, the rotational wind is applied to the compressor 100 so that heat dissipation is achieved.

The machine room temperature sensor 50 is fixedly disposed in the machine room in which the compressor 100 is installed, and detects the temperature inside the machine room to generate a bet temperature detection signal.

The outside temperature sensor 60 is fixedly installed at a predetermined outside portion of the cooling apparatus, and detects the outside temperature of the installation position of the cooling apparatus to generate an outside temperature sensing signal.

The memory 70 stores rotation RPM control information of the motor determined according to the temperature range of the outside air, and rotation RPM control information of the motor determined according to the temperature inside the machine room.

The controller 80 receives an internal temperature sensing signal from the machine room temperature sensor 50 and an external temperature sensing signal from the external air temperature sensor 60 to recognize a machine room internal temperature and an external air temperature. Based on the rotation RPM control information from the memory 70 generates a shift control signal for variable speed control of the rotation RPM of the BLDC fan motor 30 in accordance with a range of the machine room internal temperature or the outside air temperature.

Here, as shown in FIG. 2, when the outside temperature detected by the outside temperature sensor 60 exceeds 38 ° C., the BLDC fan motor 30 operates at a rotation speed of 1500 RPM. If the outside temperature is less than 36 ℃ control to operate at a rotational speed of 1270 RPM, while the outside temperature is within 36 ℃ to 38 ℃, any one of the previous rotation RPM (that is, 1270 RPM or 1500 RPM Control to maintain).

In addition, when the controller 80 detects that the temperature inside the machine room detected by the machine room temperature sensor 50 exceeds a preset set value (for example, 100 ° C.), the BLDC fan motor 30 has the highest speed. Control to operate at rotational RPM (ie 1500 RPM).

On the other hand, the compressor 100 compresses the refrigerant in a low pressure state flowing through the refrigerant pipe 110 to a high pressure, and the refrigerant compressed to a high pressure flows out through the refrigerant pipe 110, the high pressure compression function As the high heat generated in the process of driving the motor is removed by the heat radiation operation by the variable speed rotation of the BLDC fan motor 30, the temperature is lowered.

Next, the operation of the method of controlling the heat radiating motor of the machine room for a cooling machine according to the present invention made as described above will be described in detail with reference to the flowchart of FIG. 3.

3 is a flowchart illustrating an operation of a method of controlling a heat radiating motor of a machine room for a cooling machine according to an embodiment of the present invention.

First, in a state in which a compressor 100 installed inside a machine room performs an operation of compressing a refrigerant flowing through a refrigerant pipe 110 at a high pressure while operating a cooling device (S10), the compressor in the machine room temperature sensor 50. Sense the temperature inside the machine room 100 is installed to generate a bet temperature detection signal, the outside temperature sensor 60 detects the outside temperature of the cooling device to generate an outside temperature detection signal (S11).

The controller 80 receives an outside temperature temperature detection signal from the outside temperature sensor 60 to recognize the outside temperature, and determines whether the outside temperature exceeds 38 ° C. (S12).

As a result of the determination, when it is determined that the outside air temperature exceeds 38 ° C., the control unit 80 controls the driving of the motor driving unit 20 so that the BLDC fan motor 30 is rotated at a rotational speed of 1500 RPM so that the heat radiating fan 40 Control to rotate (S13).

On the other hand, if it is determined that the outside temperature detected by the outside temperature sensor 60 does not exceed 38 ° C, the controller 80 determines whether the outside temperature is less than 36 ° C (S14).

As a result of the determination, when it is determined that the outside temperature is less than 36 ° C., the controller 80 controls the driving of the motor driving unit 20 so that the BLDC fan motor 30 is rotated at a rotational speed of 1270 RPM so that the heat dissipation fan ( 40 is controlled to rotate (S15).

On the other hand, according to the determination result of step S14, if it is determined that the outside air temperature detected from the outside air temperature sensor 60 is not less than 36 ℃, it is determined that the outside air temperature is within 36 ℃ ~ 38 ℃, the control unit 80 controls the BLDC fan motor 30 to maintain the previous rotation RPM (S16).

In the state of performing the step S13, step S15 or step S16, the controller 80 determines whether the internal temperature inside the machine room detected by the machine room temperature sensor 50 exceeds a predetermined set value (S17). .

As a result of the determination, when the controller 80 determines that the internal temperature of the machine room has a temperature exceeding the set value, the BLDC fan motor 30 rotates 1500 RPM by controlling the driving of the motor driver 20. The BLDC fan motor 30 is rotated at a speed to control the rotation of the heat radiating fan 40 (S18), and the BLDC fan motor 30 is operated until the internal temperature of the machine room detected by the machine room temperature sensor 50 is lower than the set value. Maintain a rotational speed of 1500 RPM.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: power supply circuit section 20: motor drive section
22: reference signal generator 24: motor drive circuit
30: BLDC fan motor 32: three-phase coil,
34: rotor 36a, 26b, 36c: rotation detection sensor
40: heat radiating fan 50: machine room temperature sensor
60: outside temperature sensor 70: memory
80: control unit 100: compressor
110: refrigerant tube

Claims (14)

An outside air temperature sensor for sensing outside air temperature outside the cooling apparatus;
A variable speed fan motor configured to perform a heat radiating operation inside a machine room in which a compressor of the cooling device is installed by rotating the heat radiating fan at a rotational speed of a different rotation RPM, respectively, according to the outside temperature sensed by the outside air temperature sensor;
A motor driver configured to drive the variable speed fan motor at any one of a lower rotation RPM and an upper rotation RPM by variable speed drive control of a controller according to a sensed temperature of the outside air temperature sensor; And
Sub-rotate the variable speed fan motor according to whether the outside air temperature sensed by the outside air temperature sensor is less than the first outside air temperature, exceeds the second outside air temperature, and is within the range of the first outside air temperature to the second outside air temperature range. Radiating motor control apparatus for a compressor for a cooling machine, characterized in that it comprises a control unit for controlling the motor drive unit to operate at any one of the RPM or higher rotational RPM. The method of claim 1,
The variable speed fan motor is a BLDC (Blushless DC) fan motor that operates by varying the rotation speed at a lower rotation RPM and a higher rotation RPM, the radiator motor control device of the compressor for a cooling machine. The method of claim 1,
The controller controls the variable speed fan motor to operate at a rotation speed of a lower rotation RPM when the outside air temperature sensed by the outside temperature sensor is less than a first outside temperature, and if the outside air temperature exceeds the second outside temperature, the rotation speed of the upper rotation RPM. Radiating motor control device of the compressor for a cooling machine, characterized in that the control to operate. The method of claim 1,
The controller may be configured to rotate the RPM before the variable speed fan motor detects the first outdoor air temperature to the second outdoor air temperature range when the outdoor air temperature detected by the outdoor air temperature sensor is within a first outdoor air temperature to a second outdoor air temperature range. Radiating motor control device of the compressor for a cooling machine, characterized in that the control to maintain the rotational speed. The method of claim 1,
The lower rotational RPM of the variable speed fan motor is 1270 RPM, the upper rotational RPM motor control device of the compressor for a cooling machine, characterized in that 1500 RPM. The method of claim 1,
1. The radiator motor control apparatus of a compressor for a cooling machine, wherein the first outside air temperature determined by the control unit is 36 ° C., and the second outside air temperature is 38 ° C. 3. The method of claim 1,
Further comprising a machine room temperature sensor for sensing the temperature inside the machine room of the cooling machine,
The controller may control the variable speed fan motor to operate at a rotational speed of a higher rotational RPM when the internal temperature detected by the machine room temperature sensor exceeds a preset value. A first step of sensing an outside temperature by an outside temperature sensor installed outside the cooling apparatus;
A second step of determining, by the controller, whether the outside air temperature sensed by the outside air temperature sensor is less than a first outside air temperature, exceeds a second outside air temperature, and whether the outside air temperature is within a first outside air temperature to a second outside air temperature range;
The control unit generates a variable speed control signal for controlling the variable speed fan motor inside the machine room in which the compressor of the cooling machine is installed at one of the lower rotation RPM and the upper rotation RPM according to the determination result of the second step. A third step of doing; And
And a fourth step of driving the motor drive unit to operate the variable speed fan motor at any one of a lower rotation RPM and a higher rotation RPM according to the variable speed control signal of the controller. Heat dissipation motor control method. The method of claim 8,
In the third step, if the outside air temperature detected by the outside air temperature sensor is less than the first outside air temperature, controlling the variable speed fan motor to operate at a rotational speed of the lower rotation RPM,
And controlling the variable speed fan motor to operate at a rotational speed of a higher rotational RPM when the outside air temperature sensed by the outside air temperature sensor exceeds a second outside air temperature. The method of claim 8,
In the third step, if the outside air temperature detected by the outside air temperature sensor is within the first outside temperature to the second outside temperature range, the variable speed fan motor is within the first outside temperature to the second outside temperature range And controlling to maintain the rotational speed at the rotational RPM before sensing. The method of claim 8,
In the fourth step, the motor drive unit drives the BLDC (Blushless DC) fan motor as the variable speed fan motor to operate at a variable speed at a lower rotational speed and an upper rotational RPM to operate at a variable speed. Motor control method. The method of claim 8,
In the fourth step, the lower rotational RPM of the variable speed fan motor is 1270 RPM, the upper rotational RPM control method of the radiator motor of the compressor for a cooling machine, characterized in that 1500 RPM. The method of claim 8,
In the second step, the first outside air temperature determined by the control unit is a heat discharge motor control method of the compressor for a cooling machine, characterized in that 36 ℃, 38 ℃. The method of claim 8,
After the fourth step, the control unit is further configured to control the variable speed fan motor to operate at the rotational speed of the upper rotation RPM when the bet temperature detected from the machine room temperature sensor inside the cooling machine exceeds a preset value. Radiating motor control method of the compressor for a cooling machine comprising a.

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