JP2019219072A - Control device, air conditioner, and control method - Google Patents

Abstract

To provide a control device which can surely carry out high-pressure protection control of a refrigerant circuit based on a measured value from a temperature sensor.SOLUTION: A control device is a control device of carrying out high-pressure protection control for the pressure of a condenser on the basis of the temperature of the condenser. When the temperature of the condenser reaches a first predetermined temperature, the control device carries out the high-pressure protection control. When the temperature of the condenser is equal to or more than a second temperature lower than the first temperature, the control device carries out control of suppressing a rising speed of the pressure of the condenser.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a control device, an air conditioner, and a control method.

  In the cooling operation of the air conditioner, the outdoor heat exchanger is on the high pressure side. An air conditioner provided with a temperature sensor in the outdoor unit heat exchanger, configured to estimate the pressure on the high pressure side based on the temperature measured by the temperature sensor and to control the compressor based on the estimated pressure. Are provided. In such an air conditioner, when the temperature measured by the temperature sensor provided in the outdoor unit heat exchanger becomes equal to or higher than a predetermined threshold, high pressure protection control is performed to prevent a high pressure abnormality.

  As an example of the high-pressure protection control, in Patent Document 1, air is blown to the indoor heat exchanger in order to prevent a failure of a compressor or a component of a refrigerant circuit due to an increase in pressure of an indoor heat exchanger that is on a high pressure side during a heating operation. When the rotational speed of the fan is reduced, a high-pressure protection control is described in which the rotational speed of the compressor is also reduced in synchronism with the decrease in the air volume, and the pressure increase in the indoor heat exchanger is suppressed.

JP-A-11-212247

  By the way, when performing high-pressure protection control by estimating the pressure based on the temperature of the outdoor heat exchanger, especially in a situation where the pressure rises sharply, there is a deviation due to a response delay between the actual pressure and the temperature measured by the temperature sensor. Can occur. When a difference between the actual pressure and the measured temperature occurs, for example, when a high-pressure abnormality of the outdoor heat exchanger is detected by the temperature sensor, the actual pressure may have already exceeded the threshold value, and the air pressure may have increased. It may cause a failure or operation stop of the harmony machine.

  Therefore, an object of the present invention is to provide a control device, an air conditioner, and a control method that can solve the above-described problems.

  According to one aspect of the present invention, the control device is a control device that performs high-pressure protection control on the pressure of the condenser based on the temperature of the condenser, wherein the temperature of the condenser is set to a predetermined first temperature. A control unit that executes the high-pressure protection control when the temperature reaches the second temperature, which is equal to or higher than a predetermined second temperature that is lower than the first temperature, and that controls a rate of increase in the pressure of the condenser; Is provided.

  According to one aspect of the present invention, in the control for increasing the rotation speed of the compressor, the control unit reduces or stops the rotation speed of the compressor when the temperature of the condenser reaches the first temperature. When the high-temperature protection control is performed and the temperature becomes equal to or higher than the second temperature, the increasing speed of the rotation speed of the compressor is limited to a lower speed than when the temperature of the condenser is lower than the second temperature.

  According to one aspect of the present invention, when the temperature is equal to or higher than the second temperature, the increasing speed of the rotation speed of the compressor is set between 1 rps / 15 seconds and 1 rps / 20 seconds.

  According to one embodiment of the present invention, a temperature difference between the first temperature and the second temperature is in a range from 2 ° C. to 4 ° C.

  According to one embodiment of the present invention, the control device performs the high-pressure protection control and the control to suppress the rate of increase in the pressure of the condenser based on the temperature of the condenser during the cooling operation.

  According to one embodiment of the present invention, an air conditioner includes a compressor, a condenser, an expansion valve, a refrigerant circuit including an evaporator, a temperature sensor that measures the temperature of the condenser, and any one of the above. And a control device according to any of the above.

  According to one aspect of the present invention, the control method includes, in the control for increasing the rotation speed of the compressor, a temperature obtaining step of obtaining a temperature of the condenser, and a rotation speed of the compressor based on the temperature of the condenser. A rising speed setting step of setting a rising speed of the compressor, wherein in the rising speed setting step, when the temperature reaches a predetermined first temperature, the number of rotations of the compressor is reduced or stopped, and the temperature is increased. When the second temperature lower than the first temperature is reached, a limit is imposed on the rate of increase in the rotational speed of the compressor.

  According to the present invention, the refrigeration cycle can be operated by controlling the pressure of the condenser within the limit value.

It is a figure showing an example of an air conditioner in one embodiment of the present invention. It is a block diagram showing an example of a control device in one embodiment of the present invention. It is a figure showing an example of a rotation speed control table of a compressor in one embodiment of the present invention. It is a figure showing an example of transition of the number of rotations of a compressor in one embodiment of the present invention. It is a flow chart which shows an example of a control method of a compressor in one embodiment of the present invention.

<Embodiment>
Hereinafter, high-pressure protection control based on a temperature sensor in an air conditioner according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.
FIG. 1 is a diagram illustrating an example of an air conditioner according to an embodiment of the present invention.
FIG. 1 shows a configuration of the air conditioner 100. As shown in FIG. 1, the air conditioner 100 includes a refrigerant circuit including a compressor 1, an indoor heat exchanger 2, an expansion valve 3, an outdoor heat exchanger 4, a four-way valve 5, and a refrigerant pipe 6 connecting them. And a control device 20 for controlling the refrigerant circuit. For example, the indoor unit 9 is provided with the indoor heat exchanger 2, and the outdoor unit 10 is provided with the expansion valve 3, the outdoor heat exchanger 4, and the four-way valve 5. A temperature sensor 11 for measuring the temperature of the refrigerant is provided on the compressor 1 side of the outdoor heat exchanger 4, and a temperature sensor 12 is provided on the indoor heat exchanger 2. The configuration illustrated in FIG. 1 is a schematic diagram illustrating a basic configuration of the air conditioner 100, and may further include other components.

  The compressor 1 compresses the refrigerant, and discharges the compressed high-temperature, high-pressure refrigerant. In the heating operation, the control device 20 connects the port 5a and the port 5b of the four-way valve 5, and connects the port 5c and the port 5d. The refrigerant flows in the direction of arrow 8. That is, the high-temperature, high-pressure refrigerant is supplied to the indoor heat exchanger 2 (condenser) via the four-way valve 5. The refrigerant radiates heat in the indoor heat exchanger 2, condenses and liquefies. The refrigerant condensed in the indoor heat exchanger 2 is decompressed by the expansion valve 3 and becomes a low-pressure refrigerant. The low-pressure refrigerant is supplied to the outdoor heat exchanger 4 (evaporator), and is vaporized by, for example, absorbing heat from the outside air. The vaporized refrigerant passes through the four-way valve 5 and is sucked into the compressor 1. The compressor 1 compresses a low-pressure refrigerant and discharges a high-pressure refrigerant.

  In the cooling operation, the control device 20 connects the port 5a and the port 5d of the four-way valve 5, and connects the port 5b and the port 5c. That is, the high-temperature, high-pressure refrigerant is supplied to the outdoor heat exchanger 4 (condenser) via the four-way valve 5, and radiates heat to outside air and condenses. The condensed refrigerant is decompressed by the expansion valve 3 and supplied to the indoor heat exchanger 2 (evaporator). In the indoor heat exchanger 2, the refrigerant is vaporized by absorbing heat from indoor air. The vaporized refrigerant passes through the four-way valve 5 and is sucked into the compressor 1. The compressor 1 compresses a low-pressure refrigerant and discharges a high-temperature, high-pressure refrigerant. In the refrigerant circuit shown in FIG. 1, the above process is repeated and the refrigerant circulates. Thereby, the air conditioner 100 performs heating or cooling. The control device 20 switches between the heating operation and the cooling operation by controlling the four-way valve 5. Further, control device 20 adjusts the rotation speed of compressor 1 based on the difference between the temperature measured by temperature sensor 12 of indoor heat exchanger 2 and the set temperature set by the user such that the room temperature becomes the set temperature. Executing the heating operation or the cooling operation.

  In such an air conditioner 100, the control device 20 has a function of executing high-pressure protection control in order to prevent a high-pressure abnormality in the refrigerant circuit. The high-pressure protection control means that, for example, when the pressure of the outdoor heat exchanger 4 that becomes high during the cooling operation reaches a threshold value, the rotation speed of the compressor 1 is maintained or reduced, or the compressor 1 is stopped. This refers to control that suppresses high-pressure rise (decreases high pressure). When the rotation speed of the compressor 1 stops increasing due to the high-pressure protection control and the pressure of the outdoor heat exchanger 4 decreases, the control device 20 releases the high-pressure protection control and resumes the normal operation of the compressor 1. Incidentally, the temperature and pressure of the refrigerant in the outdoor heat exchanger 4 during the cooling operation are approximately proportional. Therefore, instead of providing a pressure sensor in the pipe, a temperature sensor 11 is provided in the pipe of the outdoor heat exchanger 4, and the pressure (high pressure) of the refrigerant in the outdoor heat exchanger 4 is estimated based on the temperature measured by the temperature sensor 11. can do. The control device 20 performs high-pressure protection control based on the temperature ThO-R measured by the temperature sensor 11. Specifically, when the temperature ThO-R reaches a temperature indicating that the high pressure is excessively rising, the control device 20 starts the high-pressure protection control. Next, the control device 20 will be described with reference to FIG.

FIG. 2 is a block diagram illustrating an example of a control device according to an embodiment of the present invention.
The control device 20 is a computer including a CPU (Central Processing Unit) such as a microcomputer and an MPU (Micro Processing Unit). The control device 20 performs various controls on the devices that constitute the indoor unit 9 and the outdoor unit 10. Hereinafter, the description will be focused on the functions related to the high-voltage protection control of the present embodiment. As illustrated, the control device 20 includes a sensor information acquisition unit 21 and a compressor control unit 22. The compressor control unit 22 includes a rotation speed setting unit 23.

The sensor information acquisition unit 21 acquires the temperature ThO-R of the refrigerant in the outdoor heat exchanger 4 measured by the temperature sensor 11 and the temperature of the refrigerant in the indoor heat exchanger 2 measured by the temperature sensor 12.
The compressor control unit 22 starts and stops the compressor 1 and controls the number of rotations. For example, when the temperature ThO-R reaches a predetermined first temperature (for example, 49 ° C.), the compressor control unit 22 executes the high-pressure protection control of the compressor 1. Specifically, the rotation speed of the compressor 1 is reduced or stopped. The compressor control unit 22 continues to reduce or stop the rotation speed of the compressor 1 until the temperature ThO-R decreases to a predetermined third temperature (for example, 45 ° C.). Further, the compressor control unit 22 determines that the temperature ThO-R is equal to or higher than a predetermined second temperature (for example, a predetermined value between 45 and 47 ° C.) when the rotation speed of the compressor 1 increases during the cooling operation. When the temperature becomes equal to or lower than one temperature, a limit is imposed on a rising speed of the rotation speed of the compressor 1. To limit the speed of increase of the rotation speed of the compressor 1 means that the rotation speed of the compressor 1 is increased at a speed lower than the speed of rotation when the temperature ThO-R is lower than the second temperature. Say.

  The rotation speed setting unit 23 sets a rising speed and a falling speed of the rotation speed of the compressor 1. For example, when the temperature ThO-R reaches the first temperature, the rotation speed setting unit 23 sets a reduction speed (for example, 8 rps / 1 second) of the rotation speed of the compressor 1. In addition, when the temperature ThO-R reaches a second temperature (for example, 45 ° C.) in a scene where the rotation speed of the compressor 1 is increased, the rotation speed setting unit 23 increases the rotation speed (for example, the rotation speed of the compressor 1). (1 rps / 20 seconds). The compressor control unit 22 raises or lowers the rotation speed of the compressor 1 at the rising speed or the decreasing speed set by the rotation speed setting unit 23.

  FIG. 3 shows a setting example of the increasing speed and the decreasing speed of the rotation speed of the compressor 1 for each temperature band of the temperature ThO-R. FIG. 3 is a diagram illustrating an example of a compressor rotation speed control table according to the embodiment of the present invention. The rotation speed setting unit 23 sets a change speed of the rotation speed of the compressor 1 based on the rotation speed control table.

  The “general region” illustrated in FIG. 3 is, for example, a temperature region where the temperature ThO-R is lower than 45 ° C. When the temperature ThO-R is in the range of the “general region”, the rotation speed setting unit 23 sets the rising speed of the rotation speed of the compressor 1 to “N1” rps / sec (based on the setting of the rotation speed control table). For example, the rate of decrease is set to “N2” rps / sec (eg, 1 rps / sec). When “N1” = 1, it means that the number of rotations per second is increased by one rotation over one second.

  The “restricted region” is, for example, a temperature region where the temperature ThO-R is 45 ° C. or more and less than 49 ° C. When the temperature ThO-R is in the range of the “restricted region”, the rotation speed setting unit 23 sets the increasing speed of the rotating speed of the compressor 1 to “L1” rps / sec (for example, 1 rps / 20 sec) and the decreasing speed. Is set to “L2” rps / sec (for example, 1 rps / sec).

  The “protected region” is, for example, a temperature region where the temperature ThO-R is 49 ° C. or higher. When the temperature ThO-R is in the range of the “protection region”, the rotation speed setting unit 23 sets the speed of reduction of the rotation speed of the compressor 1 to “P2” rps / sec (for example, 8 rps / sec). When the temperature ThO-R reaches the “protection region”, the number of rotations is reduced (high-pressure protection control), and thus the rising speed is not set.

  In the case of the conventional high-pressure protection control, the rotation speed is increased until the temperature ThO-R reaches the first temperature (the “protection region”) without providing the “control region” and keeping the rising speed in the “general region”. In the case of such control, it may be difficult to estimate the high pressure by the temperature sensor 11 in a situation where the rotational speed of the compressor 1 rapidly rises. For example, when the load is high and the rotation speed of the compressor 1 rises again after the high-pressure protection control is released, the pressure rise accompanying the rapid increase in the rotation speed of the compressor 1 is caused until the temperature rises as a temperature. Causes a time delay. When the pressure is estimated based on the temperature ThO-R and the high-pressure protection control is executed, the response delay delays the start of the high-pressure protection control, during which the rotational speed of the compressor 1 increases at a relatively high speed ( (For example, 1 rps / sec). When the rotation speed of the compressor 1 increases, the pressure of the outdoor heat exchanger 4 further increases and exceeds the allowable range. Therefore, in the present embodiment, when the temperature ThO-R reaches a stage before reaching the “protection region” (“restriction region”), the rising speed of the rotation speed of the compressor 1 is suppressed, and a sudden increase in pressure is prevented. (Suppress the rate of pressure rise). Thereby, the difference between the actual pressure and the pressure indicated by the temperature ThO-R is reduced, and the rotation speed of the compressor 1 can be controlled according to the actual pressure change.

Next, an example of controlling the number of revolutions of the compressor 1 by the compressor control unit 22 will be described with reference to FIG.
FIG. 4 is a diagram illustrating an example of a change in the number of revolutions of the compressor according to the embodiment of the present invention.
The vertical axis in FIG. 4 indicates the temperature ThO-R, and the horizontal axis indicates time. A graph L1 in the figure represents a change in the rotation speed of the compressor 1. The temperature T1 is an example of a first temperature (for example, 49 ° C.), and the temperature T2 is an example of a second temperature (for example, 45 ° C.) and a third temperature (in this example, the second temperature is equal to the third temperature). Further, it is assumed that the air conditioner 100 is in a cooling operation and the rotation speed of the compressor 1 increases.
At time t0, temperature ThO-R is lower than temperature T2. That is, the high pressure of the refrigerant circuit is not so high. The rotation speed setting unit 23 sets the rising speed of the rotation speed of the compressor 1 to “N1” rps / sec based on the rotation speed control table illustrated in FIG. 3 based on the fact that the temperature ThO-R is lower than the temperature T2. Set to. The compressor control unit 22 drives the compressor 1 while increasing the rotation speed of the compressor 1 at the rising speed set by the rotation speed setting unit 23.

  Next, at time t1, temperature ThOR reaches temperature T2. That is, the high pressure of the refrigerant circuit reaches the “restricted region” and is in a slightly higher state. The rotation speed setting unit 23 sets the increase speed of the rotation speed of the compressor 1 to “L1” rps / sec based on the fact that the temperature ThO-R has reached the temperature T2 (second temperature). The compressor control unit 22 gradually increases the rotation speed of the compressor 1 at the rising speed set by the rotation speed setting unit 23.

  Next, at time t2, the temperature ThOR reaches the temperature T1. That is, the high pressure of the refrigerant circuit has reached the upper limit of the allowable range, and the high pressure protection control must be started. The rotation speed setting unit 23 sets the reduction speed of the rotation speed of the compressor 1 to “P2” rps / sec based on the fact that the temperature ThO-R has reached the temperature T1. The compressor control unit 22 reduces the rotation speed of the compressor 1 at the reduction speed set by the rotation speed setting unit 23 (high-pressure protection control).

  Next, at time t3, the temperature ThO-R decreases to the temperature T2 (third temperature). That is, the high pressure has decreased to such an extent that the high pressure protection control can be released. Based on the fact that the temperature ThO-R is in the range of the temperature T2 (second temperature) or higher and lower than T1 (first temperature), the rotation speed setting unit 23 sets the speed at which the rotation speed of the compressor 1 increases to “L1”. Set to rps / sec. The compressor control unit 22 increases the rotation speed of the compressor 1 at the rising speed set by the rotation speed setting unit 23.

  For example, when the indoor temperature has reached the set temperature at time t4, the compressor control unit 22 decreases or maintains the rotation speed of the compressor 1. When reducing the rotation speed, the rotation speed setting unit 23 sets the speed of reduction of the rotation speed of the compressor 1 to “L2” rps / sec based on the rotation speed control table. The compressor control unit 22 reduces the rotation speed of the compressor 1 at the reduction speed set by the rotation speed setting unit 23.

  Here, if the temperature difference between the first temperature and the second temperature is set too wide, the responsiveness of air conditioning may be poor and the user's comfort may be impaired when the temperature difference between the room temperature and the set temperature is large. Conversely, if the temperature difference is too small, there is a possibility that the rapid rise in high pressure cannot be sufficiently suppressed. An appropriate temperature difference between the first temperature and the second temperature is, for example, in a range from 2 ° C. to 4 ° C. For example, when the first temperature is 49 ° C., the second temperature is preferably set in a range of 45 ° C. to 47 ° C.

  Further, the rising speed (“L1” rps / sec) in the “restricted region” falls within a range where the high pressure can be accurately estimated based on the temperature ThO-R without delaying to the speed at which the pressure of the outdoor heat exchanger 4 increases. It is necessary to set as follows. If the value of “L1” is large, a difference occurs between the pressure indicated by the temperature ThO-R and the actual pressure, and there is a possibility that a situation where the pressure rises beyond the threshold value cannot be detected. If the value of “L1” is small, the compressor may be used in a case where the rotation speed of the compressor 1 is increased (for example, in a case where the difference between the room temperature and the set temperature during cooling is large, and the room temperature is required to decrease as quickly as possible). 1 cannot be operated sufficiently, and user comfort is impaired. An appropriate value of the rising speed of the rotation speed of the compressor 1 in the “restricted region” is, for example, 1 rps / 20 seconds (increases the rotation speed per second by one rotation over 20 seconds) to 1 rps / 15 seconds (15 (The number of rotations per second is increased by one rotation over a second).

Next, a flow of controlling the number of lines of the compressor 1 will be described with reference to FIG.
FIG. 5 is a flowchart illustrating an example of a control method of the compressor according to the embodiment of the present invention.
The air conditioner 100 is in a cooling operation. Further, each of the temperature sensors 11 and 12 transmits the temperature measured during the cooling operation to the control device 20. In the control device 20, the sensor information acquisition unit 21 acquires the measured values of the temperatures and outputs the measured values to the compressor control unit 22.
First, the compressor control unit 22 determines whether to increase the rotation speed of the compressor 1 (Step S11). For example, if the temperature difference between the temperature measured by the temperature sensor 12 and the set temperature is equal to or greater than a predetermined value, the compressor control unit 22 determines to increase the rotation speed of the compressor 1.

  Further, for example, if the temperature difference between the temperature measured by the temperature sensor 12 and the set temperature is equal to or smaller than a predetermined value, the compressor control unit 22 does not determine that the rotation speed of the compressor 1 is to be increased. In that case (Step S11; No), the compressor control unit 22 maintains or reduces the rotation speed of the compressor 1. For example, the rotation speed setting unit 23 sets the reduction speed based on the temperature ThO-R measured by the temperature sensor 11 and the rotation speed control table illustrated in FIG. The compressor control unit 22 drives the compressor 1 while reducing the rotation speed at the reduction speed set by the rotation speed setting unit 23.

  When it is determined that the rotation speed of the compressor 1 is to be increased (Step S11; Yes), the compressor control unit 22 determines whether the temperature ThO-R is any one of the “general region”, the “control region”, and the “protection region”. (Step S14).

  When the temperature ThO-R is in the “general region”, the rotation speed setting unit 23 sets the rising speed “N1” rps / sec based on the temperature ThO-R and the rotation speed control table illustrated in FIG. The compressor control unit 22 drives the compressor 1 while increasing the rotation speed at “N1” rps / sec.

  When the temperature ThO-R is in the “control region”, the rotation speed setting unit 23 sets the rising speed “L1” rps / sec based on the temperature ThO-R and the rotation speed control table illustrated in FIG. The compressor control unit 22 drives the compressor 1 while increasing the rotation speed at “L1” rps / sec.

When the temperature ThO-R is in the “protected area”, the rotation speed setting unit 23 sets the reduction speed “P2” rps / sec based on the temperature ThO-R and the rotation speed control table illustrated in FIG. The compressor control unit 22 drives the compressor 1 while reducing the rotation speed at “P2” rps / sec.
The compressor control unit 22 repeatedly performs the control of step S11 and subsequent steps.

  According to the present embodiment, even in an operation state in which the high pressure increases during the cooling operation of the air conditioner 100, a rapid increase in the high pressure is prevented, and the high pressure can be estimated by the temperature sensor. Thereby, the high pressure is controlled within the limit value, and the air conditioner 100 can be continuously operated. Further, it is possible to prevent the compressor 1 and other devices from malfunctioning due to a high-pressure abnormality.

  In the above description, an example in which high-pressure protection control is performed based on the temperature of the outdoor heat exchanger 4 during the cooling operation has been described. Similarly, the temperature sensor 12 provided in the indoor heat exchanger 2 during the heating operation is used. If there is a system that executes the high-pressure protection control during the heating operation based on the measured temperature, the control of the present embodiment can be applied to the system.

In addition, it is possible to appropriately replace the components in the above-described embodiment with known components without departing from the spirit of the present invention. The technical scope of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.
The compressor control unit 22 is an example of a control unit.

DESCRIPTION OF SYMBOLS 1 ... Compressor 2 ... Indoor heat exchanger 3 ... Expansion valve 4 ... Outdoor heat exchanger 5 ... Four way valve 5a, 5b, 5c, 5d ... Port 6 ... Refrigerant Piping 9 indoor unit 10 outdoor unit 11 temperature sensor 12 temperature sensor 20 control unit 21 sensor information acquisition unit 22 compressor control unit 23・ Rotation speed setting unit 100 ・ ・ ・ Air conditioner

Claims (7)

A control device for performing high-pressure protection control based on the temperature of the condenser, for the pressure of the condenser,
When the temperature of the condenser reaches a predetermined first temperature, the high-pressure protection control is executed,
When the temperature of the condenser is equal to or higher than a predetermined second temperature lower than the first temperature, a control unit that performs control to suppress a rate of increase in pressure of the condenser;
A control device comprising: The control unit executes the high-pressure protection control to decrease or stop the rotation speed of the compressor when the temperature of the condenser reaches the first temperature, in the control for increasing the rotation speed of the compressor. When the temperature is equal to or higher than the second temperature, the rising speed of the rotation speed of the compressor is limited to a lower speed than when the temperature of the condenser is lower than the second temperature.
The control device according to claim 1. A rising speed of the rotation speed of the compressor when the temperature is equal to or higher than the second temperature is set between 1 rps / 15 seconds and 1 rps / 20 seconds;
The control device according to claim 2. A temperature difference between the first temperature and the second temperature is in a range of 2 ° C. or more and 4 ° C. or less;
The control device according to any one of claims 1 to 3. Performing the high-pressure protection control based on the temperature of the condenser during cooling operation and control to suppress the rate of increase in the pressure of the condenser,
The control device according to claim 1. A refrigerant circuit including a compressor, a condenser, an expansion valve, and an evaporator,
A temperature sensor for measuring the temperature of the condenser,
A control device according to any one of claims 1 to 5,
Air conditioner equipped with. In the control to increase the rotation speed of the compressor,
A temperature obtaining step of obtaining a temperature of the condenser;
A rising speed setting step of setting a rising speed of the rotation speed of the compressor based on the temperature of the condenser,
In the rising speed setting step, when the temperature reaches a predetermined first temperature, the rotation speed of the compressor is reduced or stopped, and when the temperature reaches a second temperature lower than the first temperature, the compressor of the compressor is stopped. Limit the speed of rotation
Control method.

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