JP2000205626A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an air conditioner which can be driven upon occurrence of a failure at a part other than the driving system thereof by controlling a refrigerant compressor to operate at a rated frequency or below when an abnormality is detected during test operation. SOLUTION: An operation switch 88 which can interrupt operating power supply to an air conditioner is normally set at normal operation and switched to test operation at the time of maintenance. When the switch 88 is switched to test operation, a microcomputer 74 delivers a control signal to the microcomputer of an outdoor unit so that the frequency of power outputted from an inverter circuit is set at rated frequency and checks normal operation of the air conditioner. When an abnormality is detected in the operation of the air conditioner, the microcomputer 74 delivers a control signal to the microcomputer of an outdoor for operating the compressor motor at a frequency one half that of the rated frequency thus lowering the capacity of the compressor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an air conditioner.

[0002]

2. Description of the Related Art Conventionally, an air conditioner (hereinafter, referred to as an "air conditioner") has been used to appropriately adjust the temperature of a room. Air conditioners usually have various modes of operation, such as an automatic control mode that automatically controls the wind power, wind direction, and temperature to keep the indoor temperature at a preset temperature, and a sleep mode that adjusts to an environment suitable for sleep. A mode is provided.

[0003] The operation mode is usually selected by a remote control switch. The remote control switch is configured so that, in addition to selecting the operation mode, operating conditions such as set temperature, wind direction, and air volume can be manually set. Operation is started.

When various setting conditions are transmitted from the remote control switch to the air conditioner, the set temperature and the room temperature are compared in the air conditioner, and the necessary air-conditioning air temperature and air volume are adjusted so that the room temperature becomes the set temperature. The air conditioning capacity of the compressor is set, and the operating frequency of the compressor for obtaining the conditioned air at the set temperature is set.

[0005] Thereafter, the air conditioner operation of the air conditioner is started by driving the compressor based on the set operation frequency. In the air conditioner, the air conditioning capacity is adjusted according to the change in the room temperature to quickly bring the room into a desired air conditioning state and maintain this air conditioning state (set temperature).

Generally, a test run switch is provided on an air conditioner so that the test run can be switched to a test run to check the operation of the air conditioner when the air conditioner is first installed or when the air conditioner does not operate normally due to some trouble. Is provided.

When the test operation switch is turned on and the air conditioner is switched to the test operation, the air conditioning operation is started in the air conditioner by fixing the operating frequency of the compressor to the rated frequency regardless of the room temperature and the room humidity. After confirming that the air conditioner operates normally in the test operation, the switch from the test operation to the normal operation is switched to start using the air conditioner.

[0008]

Generally, when an air conditioner detects an abnormality such as an increase in load, an increase in current due to an abnormal compressor temperature, an abnormality in a sensor, a disconnection, or a serial communication error, the operation of the compressor is forcibly performed. And a failure circuit for stopping the operation of the air conditioner.

For this reason, even if a difference occurs only in a portion provided separately from the drive system of the air conditioner, such as a sensor used for detecting the indoor environment, the operation of the air conditioner is stopped. .

That is, even if there is no abnormality in the drive system of the air conditioner such as a cooling operation or a heating operation by driving the compressor, and other parts such as the control system of the air conditioner are just broken, the troubled part is repaired. During this period, there is a disadvantage that the air conditioner cannot be driven.

In view of the above, it is an object of the present invention to provide an air conditioner that can drive an air conditioner when a failure occurs in a portion different from the drive system of the air conditioner.

[0012]

In order to achieve the above object, an air conditioner according to the present invention uses a radiating action of compressed refrigerant or a cooling action by absorbing heat of vaporization to set a room to be conditioned to a predetermined temperature. An air conditioner that performs air conditioning so as to be selected from a plurality of operation modes during normal operation.
While compressing the refrigerant according to the operating frequency set according to the two operation modes, and during the test operation, a compressor that compresses the refrigerant according to the rated frequency, and when an abnormality is detected during the test operation, the operating frequency of the compressor is increased from the rated frequency. Operation control means for controlling the frequency to a low frequency.

That is, according to the first aspect of the present invention, when an abnormality is detected during a test operation such as after installation of the air conditioner or during maintenance, the operation control means controls the operation frequency of the compressor to a frequency lower than the rated frequency. Because
Operate the air conditioner if the detected abnormality is caused by a failure in the control system of the air conditioner such as an increase in load, an increase in current due to an abnormal compressor temperature, a sensor abnormality, a disconnection, or a serial communication error. Can be.

Thus, even if another part such as the control system of the air conditioner has just failed, the compressor is driven by an output corresponding to the operating frequency controlled by the operation control unit until the failed part is repaired. Since the cooling operation (or the heating operation) can be performed, it is possible to avoid a disadvantage that the air conditioner cannot be used at all until the malfunction is corrected. When an abnormality is detected during the test operation, the operation frequency set by the operation control unit may be a frequency lower than the rated frequency, but preferably, as in the invention of claim 2, １ ／ of the rated frequency. Frequency.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS.

(Configuration) FIG. 1 shows an air conditioner (hereinafter, referred to as "air conditioner 10") applied to the present embodiment. The air conditioner 10 includes an indoor unit 12 and an outdoor unit 14, and is operated / stopped by operating a wireless remote control switch (hereinafter, referred to as "remote controller 120") provided as a remote control unit. When the operating condition such as the operating mode and the set temperature is set by the remote controller 120 and an operation signal is transmitted, the air conditioner 10 receives the operation signal in the indoor unit 12 and operates based on the operation signal. .

FIG. 2 shows an indoor unit 1 of the air conditioner 10.
2 schematically shows a refrigeration cycle configured between the outdoor unit 2 and the outdoor unit 14. Between the indoor unit 12 and the outdoor unit 14, a pair of thick refrigerant pipes 16 </ b> A and a thin refrigerant pipe 16 </ b> B for circulating the refrigerant are provided in pairs, and one end of each of the heat pipes is provided in the indoor unit 12. It is connected to the exchanger 18.

The other end of the refrigerant pipe 16A is connected to the outdoor unit 1
4 is connected to the valve 20A. This valve 20A
Is connected to the four-way valve 24 via the muffler 22A. Each of the four-way valves 24 has a compressor 26.
Accumulator 28 and muffler 22B connected to
Is connected. Further, the outdoor unit 14 is provided with a heat exchanger 30. One end of the heat exchanger 30 is connected to the four-way valve 24, and the other end is connected to the valve 20 B via a capillary tube 32, a strainer 34, an electric expansion valve 36, and a modulator 38. The other end of the refrigerant pipe 16B is connected to the valve 20B, so that the indoor unit 12 and the outdoor unit 1 are connected.
A closed circulation path of the refrigerant forming a refrigeration cycle is formed between the four.

The air conditioner 10 can perform a cooling or heating operation by circulating the refrigerant in the refrigeration cycle by operating the compressor 26.

That is, in the cooling mode, the refrigerant compressed by the compressor 26 is liquefied by being supplied to the heat exchanger 30, and the liquefied refrigerant is vaporized by the heat exchanger 18 of the indoor unit 12. The air passing through the heat exchanger 18 is cooled. In the heating mode, on the contrary, the refrigerant compressed by the compressor 26 radiates heat by being condensed in the heat exchanger 18 of the indoor unit 12, and the air passing through the heat exchanger 18 by the heat radiated by the refrigerant. Heat.

In FIG. 2, the flow of the refrigerant in the cooling mode (cooling operation) and the heating mode (heating operation) are indicated by arrows. By switching the four-way valve 24, the operation mode is changed to the cooling mode (dry mode). The evaporating temperature of the refrigerant is adjusted by switching the heating mode and controlling the valve opening of the electric expansion valve 36.

FIG. 3 shows a schematic cross section of the indoor unit 12. The interior of the indoor unit 12 is covered by a casing 42 that is locked on the upper and lower sides (up and down on the paper surface of FIG. 2) of a mounting base 40 mounted on an indoor wall surface (not shown). In this casing 42, a cross flow fan 44 is arranged at the center. The heat exchanger 18 is arranged from the front side to the upper side of the cross flow fan 44, and the heat exchanger 18 and the casing 4
A filter 48 is arranged between the front surface 2 and the suction port 46 formed on the upper surface side. An outlet 50 is formed at a lower portion of the casing 42.

Thus, in the indoor unit 12, the rotation of the cross flow fan 44 causes the air in the room to be sucked in from the suction port 46, passes through the filter 48 and the heat exchanger 18, and then blows out from the blowout port 50 toward the room. Is done. In the indoor unit 12, the heat exchanger 18 is cooled or heated by the operation of the refrigeration cycle, and the air sucked from the room is cooled or heated by the heat exchanger 18 when passing through the heat exchanger 18. The air is blown out into the room to achieve indoor air conditioning.

A left and right flap 52 and an upper and lower flap 54 are provided in the air outlet 50.
The direction of the conditioned air blown out can be changed by the second and upper and lower flaps 54.

As shown in FIG. 4, the indoor unit 12 is provided with a power supply board 56, a control board 58, and a power relay board 60. On a power supply board 56 to which electric power for operating the air conditioner 10 is supplied, a motor power supply 62, a control circuit power supply 64, a serial power supply 66, and a drive circuit 68 are provided. Control board 5
8, a serial circuit 70, a drive circuit 72, and a microcomputer 74 are provided.

The drive circuit 68 of the power supply board 56 is connected to a fan motor 76 (for example, a DC brushless motor) for driving the cross flow fan 44, and receives a control signal from a microcomputer 74 provided on the control board 58. In response, driving power is supplied from the motor power supply 62.
At this time, the microcomputer 74 controls the speed of the fan motor 76 by controlling the output voltage from the drive circuit 68 to change in the range of 12 V to 36 V in 256 steps.

The drive circuit 72 of the control board 58 is connected to an upper and lower flap motor 78 for operating the power relay board 60 and the upper and lower flaps 54. The power relay board 60 is provided with a power relay 80, a temperature fuse, and the like. The power relay 80 is operated by a signal from the microcomputer 74 to open and close a contact 80A for supplying power to the outdoor unit 14. Air conditioner 1
In the case of 0, the electric power is supplied to the outdoor unit 14 when the contact 80A is closed, so that the outdoor unit 14 is operated.

The upper and lower flap motors 78 are controlled in accordance with a control signal from the microcomputer 74 to operate the upper and lower flaps 5.
Operate 4. When the upper and lower flaps 54 are swung in the vertical direction, the outlet 50 of the indoor unit 12 is opened.
The direction in which air is blown out of the apparatus is changed in the vertical direction. The operation of the upper and lower flaps 54 can be fixed so that the blowing wind can be directed to an arbitrary position. However, in the automatic mode, the operation can be randomly changed at a plurality of positions.

As described above, in the indoor unit 12 of the air conditioner 10, by controlling the rotation of the cross flow fan 44 and the operation of the upper and lower flaps 54, the air flow is controlled to a desired air volume and direction or to make the room comfortable. The air conditioned by the flow rate and the flow direction can be blown into the room.

The serial circuit 70 is connected to the microcomputer 74 and the serial power supply 66 of the power supply circuit 56, and further to the outdoor unit 14. The microcomputer 74 performs serial communication with the outdoor unit 14 via the serial circuit 70, and controls the operation of the outdoor unit 14.

The indoor unit 12 is provided with a display circuit 82 provided with a receiving circuit for receiving an operation signal from a remote controller 120 described later, a display LED for operation display, and the like. 74. As shown in FIG. 1, the display substrate 82 is
A is exposed on the surface of the casing 42, and an operation signal from the remote controller 120 is received and input by the display unit 82A.

As shown in FIG. 4, a microcomputer 74 is connected to a room temperature sensor 84 for detecting the room temperature and a heat exchange temperature sensor 86 for detecting the coil temperature of the heat exchanger 18. Service LED and the operation changeover switch 88 are connected. Note that a temperature sensor is also provided in a remote controller 120 described later, and the room temperature is normally measured by the remote controller 120 and transmitted at a predetermined timing.

The operation changeover switch 88 is used for switching between a normal operation and a test operation performed at the time of maintenance, and can cut off the supply of operation power to the air conditioner 10 by opening a contact of a power switch 88A. . Normally, the operation changeover switch 88 is set to a normal operation, but is switched to a test operation during maintenance.

When the operation changeover switch 88 is switched to the test operation, the microcomputer 74 operates the inverter circuit 10 described later.
A control signal is output to a microcomputer 98 of the outdoor unit 14 to be described later so that the frequency of the power output from 6 is fixed at the rated frequency, and it is checked whether the air conditioner 10 operates normally.

When it is confirmed that the air conditioner 10 operates normally, the operation changeover switch 88 is switched to the normal operation to start the normal operation. When an abnormality is detected in the operation of the air conditioner 10, the microcomputer 74 causes the outdoor unit 14 described below to operate.
A control signal is output to the microcomputer 98, and the operating frequency of the compressor motor 108 is set to half the rated frequency to control the performance of the compressor 26 to be low.

As a result, the air conditioner 10 is limited to a low operating capacity irrespective of the surrounding environment. As a result, even if the current increases, it is difficult to reach the specified value.If the current increases, it is difficult to operate the failure circuit that stops the air conditioner by determining that it is abnormal, and completes the failure even if an abnormality is detected during test operation. The operation can be performed with a certain level of capability during the period until the vehicle is repaired. The service LED is configured to inform a service person of a self-diagnosis result by performing a lighting operation at the time of maintenance.

The indoor unit 12 is connected to the outdoor unit 14 via terminals 90A, 90B and 90C of the terminal board 90.

As shown in FIG. 5, the outdoor unit 14 is provided with a terminal plate 92, and the terminals 92A, 92B, 92C of the terminal plate 92 are connected to the terminals 90A, 90B of the terminal plate 90 of the indoor unit 12, respectively. , 90C
It is connected to the. Thus, the outdoor unit 14 is configured to be supplied with operating power from the indoor unit 12 and to be capable of serial communication with the indoor unit 12.

The outdoor unit 14 includes a rectifying board 9
4. A control board 96 is provided. The control board 96 includes a microcomputer 98, noise filters 100A, 100B, 100C, and a serial circuit 102.
And a switching power supply 104 and the like.

The rectifying board 94 includes a noise filter 100
A rectifies the power supplied through the A
The data is smoothed via 00B and 100C and output to the switching power supply 104. The switching power supply 104 is connected to the inverter circuit 106 together with the microcomputer 98.
As a result, electric power having a frequency corresponding to the control signal output from the microcomputer 98 is output from the inverter circuit 106 to the compressor motor 108 to drive the compressor 26 to rotate.

The microcomputer 98 is connected to the inverter circuit 1
The frequency of the power output from 06 is off or 14Hz
The control is performed so as to be in the range described above (the upper limit is determined by the upper limit of the operating current).
08, that is, the rotation speed of the compressor 26 is changed,
Capacity of compressor 26 (cooling / heating capacity of air conditioner 10)
Is controlled. The control board 96 includes a four-way valve 24.
A fan motor 110 for driving a fan (not shown) for cooling the heat exchanger 30 and a fan motor condenser 110A are connected. Further, the outdoor unit 14 is provided with an outside air temperature sensor 112 for detecting the outside air temperature, a coil temperature sensor 114 for detecting the temperature of the refrigerant coil of the heat exchanger 30, and a compressor temperature sensor 116 for detecting the temperature of the compressor 26. These are connected to the microcomputer 98.

At the time of normal operation, the microcomputer 98 switches the four-way valve 24 according to the operation mode, and receives the control signal from the indoor unit 12 and the detection results of the outside air temperature sensor 112, the coil temperature sensor 114, and the compressor temperature sensor 116. On the basis of this, ON / OFF of the fan motor 110, the operating frequency of the compressor motor 108 (the capacity of the compressor 26) and the like are controlled.

In the cooling or dry operation, the cooling region where the cooling operation is performed, the dry AA region where the cooling operation is lower than the cooling region but the dehumidifying capability is higher than the dry A region, the room temperature and the set temperature are compared. A dry A region in which the dry operation is performed so that the operating frequency of the compressor 26 is reduced to a predetermined value based on a linear equation set based on the temperature difference, the compressor 26 is turned on and off at predetermined intervals at the predetermined value, and intermittently. A dry B region in which the operation is performed is set. In the cooling area, the dry AA area, and the dry A area, the compressor 26 may be forcibly turned off, for example, for about 3 minutes.

During the test operation, the microcomputer 98 controls the inverter circuit 106 based on the control signal from the microcomputer 74 of the indoor unit 12 irrespective of the detection results of the outside air temperature sensor 112, the coil temperature sensor 114 and the compressor temperature sensor 116. The air conditioner 10 is operated with the frequency of the power output from the air conditioner fixed at the rated frequency.

When the air conditioner does not operate normally, the operating frequency of the compressor motor 108 is controlled to half the rated frequency based on the control signal sent from the microcomputer 74 of the indoor unit 12.

FIGS. 6A and 6B show an example of a remote controller 120 used for remote control of the air conditioner 10. FIG.

The remote control 120 is provided with a display window 124 using a rectangular liquid crystal panel in a casing 122. As shown in FIG. 6B, the display window 124
Various operation conditions such as an operation mode, a set temperature, a room temperature (room temperature), and an air volume can be displayed. As shown in FIG. 6A, during operation of the air conditioner 10, set operation conditions or operation conditions such as an operation mode, a set temperature or a room temperature, and an air volume are selected and displayed.

As shown in FIGS. 6A and 6B,
The start / stop button 12 is provided on the surface of the casing 122.
6. Temperature setting buttons 128A, 128B, one hour timer (1H timer) button 130, one touch eco button 132 for setting energy saving operation conditions, automatic operation mode, heating, dry, cooling, air blowing, air cleaning An operation switching button 138 for sequentially switching, an air volume button 140 for switching the air volume blown out from the outlet 50 of the indoor unit 12 and a wind direction, a wind direction button 142, a sleep button 144 for obtaining a comfortable sleep, and an amp switching button. 146, a timer ON button 150, a timer OFF button 152, and a timer setting button 154 are provided, and the operating capacity of the air conditioner 10 can be variously set. Further, a display corresponding to these operations is made on the display window 124 (for example, see FIG. 6A).

The air conditioner 10 has a run / stop button 126
Is operated or stopped by the operation of. The display window 12
The set temperature displayed in 4 becomes higher by operating the temperature setting button 128A, and becomes lower by operating the temperature setting button 128B.

The one-hour timer button 130 is
The operation time of 0 is set to 1 hour, and after 1 hour, the stop signal is transmitted from the remote controller 120 to the indoor unit 12 of the air conditioner 10.

The amp change button 146 is used to switch the setting of the used electric capacity.
It can be switched from 0 amps to 15 amps. As a result, the maximum current value can be saved, so that a breaker down can be prevented even when used in combination with other electric appliances.

Each of the timer-in button 150 and the timer-off button 152 is used to set an operation start time and an operation stop time. For example, the reservation time displayed in the display window 124 is operated by operating the timer in button 150. After changing the time and displaying the desired time, press the timer setting button 1
By operating the timer 54, timer reservation is performed.

The casing 122 of the remote controller 120
Is provided with a cover 134.
4A, the reset button 156 and the sensor switching button 158 are exposed as shown in FIG. 6B.

FIG. 7 is a functional block diagram of the remote controller 120. The remote controller 120 has a display section 160 for displaying the display window 120, an operation section 162 provided with the various setting buttons described above, A room temperature sensor 164 for detecting the room temperature and a timer circuit 166 having a clock function for measuring time are provided, and these are connected to a remote controller 168 including a microcomputer. The remote control unit 168 includes the indoor unit 12.
A transmission unit 170 for transmitting an operation signal to the control unit is connected.

The remote control unit 168 sends an operation signal of the air conditioner 10 according to the operation state input from the operation unit 162 to the indoor unit 12 and the room temperature sensor 16
4 is also transmitted. Also,
The remote controller 168 confirms whether or not the indoor unit 12 is operating. This confirmation is made based on, for example, a reception response from the indoor unit 12 when the operation signal is transmitted.

When the operation of the air conditioner 10 is timer-reserved, the remote controller 168 stores the contents of the reservation, and automatically sends an operation or stop signal to the indoor unit 12 in accordance with the reservation. The air conditioner 10 is operated or stopped.

(Operation) Next, the control in the normal operation and the test operation performed by the microcomputer 74 of the indoor unit 12 in the air conditioner of the present embodiment will be described with reference to the flowchart of FIG.

First, in step 200, it is determined whether or not the operation changeover switch 88 has been switched to the test operation. If the operation changeover switch 88 has not been switched to the test operation, it is determined that the operation is the normal operation, and the routine ends.

If the operation changeover switch 88 has been switched to the test operation, the operation is judged to be the test operation, and
Then, the control signal is output to the microcomputer 98 of the outdoor unit 14 so that the operating frequency output from the inverter circuit 106 to the compressor motor 108 becomes the rated frequency (step S2).

Further, in step 204, the air conditioner 1
It is determined whether the cooling operation (or heating operation) of 0 is performed normally. Cooling operation (or heating operation) of the air conditioner 10
If the operation is normally performed, the process proceeds to step 214, the service LED indicating that there is no abnormality is turned on, and this routine ends.

If it is determined in step 204 that the cooling operation (or heating operation) of the air conditioner 10 is not performed normally, the process proceeds to step 206, where the inverter circuit 1
A control signal is output to the microcomputer 98 of the outdoor unit 14 so that the operating frequency output from 06 to the compressor motor 108 is half the rated frequency.

Further, in step 208, it is determined whether or not the compressor 26 is driven at a frequency half the rated frequency to perform a cooling operation (or a heating operation). If a cooling operation (or a heating operation) is being performed, step 2
The routine proceeds to step 10, where the service LED indicating that the drive is being performed at half the rated frequency is turned on, and this routine ends.

If the cooling operation (or the heating operation) is not being performed, the process proceeds to step 216, where it is determined that the drive system of the compressor 26 has failed, the power relay 80 is operated, and the electric power is supplied to the outdoor unit 14. Is closed, the power supply to the outdoor unit 14 is cut off, the power supply to the compressor is stopped, and this routine ends.

As described above, in the present embodiment, after the abnormality is detected during the test operation, the operation of the air conditioner 10 is not completely stopped, but the operation frequency of the compressor 26 is set to 周波 数 of the rated frequency. It is determined whether the cooling operation (or heating operation) of the air conditioner 10 is performed, and the air conditioner 1
If the cooling operation (or the heating operation) of 0 can be performed, the air conditioner 10 can be operated with a constant capacity. For example, the parts necessary for repairing the failure are not at hand, and until the parts arrive. If the air conditioner 10 cannot be repaired immediately, such as when the air conditioner cannot be repaired during
The inconvenience that the air conditioner cannot be used at all from the time when the abnormality is discovered to the time when the air conditioner 10 is repaired can be avoided.

[0065]

As described above, according to the first and second aspects of the present invention, if a failure occurs in a part other than the drive system of the air conditioner at the time of trial operation, the air conditioner is turned off. There is an effect that operation can be performed with a constant output.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an air conditioner applied to the present embodiment.

FIG. 2 is a schematic diagram showing a refrigeration cycle of an air conditioner applied to the present embodiment.

FIG. 3 is a schematic sectional view showing an indoor unit.

FIG. 4 is a block diagram schematically showing a circuit configuration of the indoor unit.

FIG. 5 is a block diagram schematically showing a circuit configuration of the outdoor unit.

FIG. 6A is a plan view of a remote controller showing an example of a display during operation of the air conditioner. (B) is a plan view of the remote control in which all of the characters displayed in the display window of the remote control are displayed.

FIG. 7 is a functional block diagram illustrating an example of a remote controller.

FIG. 8 is a flowchart showing a flow of a control routine in a normal operation and a test operation performed by the microcomputer 74 of the indoor unit 12.

[Explanation of symbols]

 Reference Signs List 10 air conditioner (air conditioner) 12 indoor unit 14 outdoor unit 18 heat exchanger 26 compressor 30 heat exchanger 74 microcomputer (operation control means) 86 heat exchange temperature sensor 112 outside air temperature sensor 120 remote control

Continuing on the front page (72) Inventor Kazushima Shimayama 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Mitsuru Toyoda 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka No. Sanyo Electric Co., Ltd. (72) Inventor Manabu Ishihara 2-5-5 Keihanhondori, Moriguchi City, Osaka Prefecture Inside Sanyo Electric Co., Ltd. (72) Gen Takada 2-chome, Keihanhondori, Moriguchi City, Osaka Prefecture No.5 Sanyo Electric Co., Ltd. F term (reference) 3L060 AA02 AA04 CC19 DD02 DD05 EE04

Claims (2)

[Claims] 1. An air conditioner that performs air conditioning so that a room to be air-conditioned reaches a set temperature by utilizing a heat radiating action of a compressed refrigerant or a cooling action by absorbing vaporization heat. A compressor that compresses the refrigerant according to an operation frequency set according to one operation mode selected from the operation modes and compresses the refrigerant according to a rated frequency during a test operation; And an operation control means for controlling the operation frequency of the device to a frequency lower than the rated frequency. 2. The air conditioner according to claim 1, wherein the frequency lower than the rated frequency is a half of the rated frequency.