JP2000241006A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an excess thermal protection by providing a detecting means for detecting a temperature of a heating component in a controller, and limiting an upper limit of an operating current based on the detected temperature and a drive mode. SOLUTION: A semiconductor 6A used for an inverter and a semiconductor 6B used for a converter are provided in a control board 5, and the semiconductors 6A, 6B and a fin temperature thermistor 8 for measuring a temperature of a semiconductor cooling radiating plate are provided in a control circuit 10. Temperature data from the thermistor 8 is input to a microcomputer 11, which compares the temperature of the thermistor 8 with a protective temperature of the preset semiconductors. If the temperature of the thermistor 8 is lower than the protective temperature, the control is continued, while if it is higher than the protective temperature, an operation mode is identified, and an upper limit of the current is limited based on the mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to temperature protection of a control device for controlling an operating current of a compressor incorporated in a refrigeration cycle of an air conditioner.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a circuit configuration diagram showing a conventional air conditioner control device disclosed in Japanese Patent Laid-Open Publication No. HEI 9-205, which mainly includes an electric circuit 2A on the indoor unit side and an electric circuit 3A on the outdoor unit side. FIG.
3, reference numeral 61 denotes a plug for supplying power to the indoor unit-side control device; 62, a power switch;
Denotes a power relay, and 64 denotes a power relay board, on which a power relay 65 and a temperature fuse 66 are provided.

[0003] 67 is a power supply board, 68 is a motor power supply, 69
Is a serial power supply, 70 is a control circuit power supply, 71 is a drive circuit, 72 is a fuse, 73 is a fan motor, 74 is a control board, 75 is a serial circuit, 76 is a driving circuit,
77 is a microcomputer (microcomputer), 78 is a service LED used for service, 79 is an operation changeover switch, 80 is an up / down flap driven by a drive circuit (a wind direction change plate that changes the blowing direction in a vertically extending vertical direction). ) For driving the upper and lower flap motors. A display substrate 81 includes a display LED 82 and a receiving circuit 82 for receiving a signal from a wireless remote controller.

[0004] 84 is a room temperature sensor for detecting the temperature of the indoor air, 85 is a heat exchange fin temperature thermistor 86 for detecting the temperature of the indoor heat exchanger, and 3 is a three-pin terminal plate on the indoor unit side. There is an inter-unit cable. 8
7 is a control board, 88 is a noise filter, 89 is a serial circuit, 90 is a noise filter, 91 is a fuse, 92 is a fuse, 93 is a noise filter, 94 is a switching power supply, and 95 is a microcomputer. Reference numeral 96 denotes a diode, and 56A denotes a power transistor provided in the HIC. A drive circuit for driving the transistor is not shown. 97 is a temperature sensing element attached to the power transistor, which outputs a signal of the detected temperature to the microcomputer 95, and uses a thermistor. 37A is a condenser for the fan motor.

[0005] By controlling the control board, it is possible to control the operating current by controlling the operating frequency to the compressor. Therefore, under the control of the control board (control device), not only the operating capacity of the compressor is varied, but also the operating current of the compressor is varied.

The specific operation of the control device for an air conditioner described above is as follows. When the temperature detected by the temperature sensing element reaches 80 ° C. (predetermined value), the upper limit value of the operating current of the compressor is set to 0.5.
The operating frequency is controlled so that A decreases to 14.5A. For this reason, although the maximum value (upper limit value) of the cooling capacity is reduced, it is possible to avoid suddenly stopping the cooling operation.

When the detected temperature further rises to 81 ° C., the upper limit is further reduced by 0.5 A to 14.0 A. Similarly, the temperature rises, 82 ° C, 83
° C, 84 ° C, 85 ° C, 86 ° C, 87 ° C, 88 ° C, 89 ° C
, The upper limit is 13.5A, 13.0A, 1
2.5A, 12.0A, 11.5A, 11.0A, 1
0.5A, 10.0A. Then, when the temperature further rises and reaches 100 ° C., the operation of the air conditioner is stopped in order to prevent damage to the power transistor.

[0008]

The conventional air conditioner is constructed as described above. In a control device of the air conditioner, for example, in recent years, a converter for converting a commercial power supply to a direct current has a variable DC voltage. However, in order to protect the semiconductor used in the converter device, the operating range of the air conditioner is reduced and the operation stopped when the outside air temperature is high or the load is overloaded. There was a problem such as making it. In this case, there is a problem that the thermal protection of the control device works excessively and the air-conditioning environment deteriorates.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an air conditioner that prevents excessive heat protection and provides stable performance according to an operation mode. I do.

[0010]

SUMMARY OF THE INVENTION An air conditioner according to the present invention is an air conditioner provided with a control device for controlling an operation current and the like of a compressor incorporated in a refrigeration cycle. And current limiting control means for limiting the upper limit of the operating current based on the temperature detected by the detecting means and the operation mode.

Further, the control device is arranged in an outdoor unit of a separate type air conditioner.

Further, in an air conditioner provided with a control device for controlling an operating current and the like of a compressor incorporated in a refrigeration cycle, an overload detecting means for detecting an overload, information on the detected overload and an operation mode are provided. Current limiting control means for limiting an upper limit of the operating current based on the operating current.

Further, the current limit control means limits the operating current to an upper limit value which differs for each operation mode.

Further, the current limit control means differs in the detected temperature or the overload information for limiting the upper limit value of the operating current for each operation mode.

The current limit control means changes an upper limit of the operating current based on the detected temperature or the overload information.

The current limit control means changes the upper limit of the operating current based on the detected temperature after the upper limit of the operating current or the overload information.

[0017] Further, the current limit control means further reduces the upper limit of the operating current or stops the operation when the detected temperature or the overload information after the upper limit of the operating current is not improved.

The current limit control means increases the upper limit of the operating current when the detected temperature or the overload information after the upper limit of the operating current is improved.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective plan view and a front view showing a configuration of an outdoor unit of an air conditioner, FIG. 2 is a cross-sectional view showing an electric parts box in which the outdoor unit is mounted, and FIG. It is a front view which shows the heat sink which cools a semiconductor. In FIG. 1, 1 is an outdoor unit of a separate type air conditioner, 2 is a compressor incorporated in a refrigeration cycle, and 3 is provided in an outdoor unit 1, and generates an outside air flow in an outdoor heat exchanger of the refrigeration cycle to generate heat. Outdoor fan to encourage replacement,
Reference numeral 4 denotes an electric component box in which a control device for controlling the operating current and the like of the compressor 2 is stored.

The outdoor unit 1 uses an outdoor fan 3 to flow air from the rear to the front of the outdoor unit 1, and to suck air from the side of the outdoor unit 1, pass through the electric component box 4, and discharge air to the front of the outdoor unit 1. Is formed. In FIG. 2, the electric component box 4 includes a converter section and an inverter section, and houses a control board 5 which is a control device for controlling a drive current and a frequency of a drive motor of the compressor 2, and the control board 5 includes a converter section. And a semiconductor 6 used for the inverter unit, and a cooling radiator 7 for the semiconductor 6 is mounted on the semiconductor 6.

In FIG. 3, the semiconductor 6 attached to the control board 5 comprises a semiconductor 6A used for the inverter section and a semiconductor 6B used for the converter section. 8 is a fin temperature thermistor which is a temperature sensor for measuring the temperature of the semiconductor cooling radiator plate 7 and the semiconductors 6A and 6B;
Reference numeral 9 denotes a substrate temperature thermistor, which is a temperature sensor for measuring the temperature on the control substrate 5, and reference numeral 10 denotes a control circuit unit described in detail with reference to FIG.

In FIG. 4, the control circuit section 10 is connected to communication lines between the semiconductors 6A and 6B, the fin temperature thermistor 8, the substrate temperature thermistor 9 and the indoor unit, and connects between the indoor unit and the outdoor unit of the air conditioner. A microcomputer (hereinafter, referred to as a microcomputer) 11 for performing communication by serial signals, controlling a converter unit and an inverter unit, and reading and controlling signals from each temperature sensor, and a control value of a current flowing into the converter unit and a semiconductor device 6. And an electrically erasable storage element (hereinafter, referred to as a memory) 12 for storing the protection temperature. As the memory 12, an EEPROM is typical.

FIG. 5 is a control flowchart in this embodiment. FIG. 6 is a time chart showing the order in which the values stored in the memory 12 are stored.

Hereinafter, the operation of the air conditioner configured as described above will be described with reference to the control flowchart of FIG. In step 101, the microcomputer 11 mounted on the control board 5, which is the outdoor unit control unit, receives the serial signal from the indoor unit, and determines the operation mode of the air conditioner in step 102. If the operation is the cooling operation, the process proceeds to step 103. If the operation is the heating operation, the process proceeds to step 106.

If the cooling operation mode is selected, the current value I1 to be controlled during the cooling operation from the memory 12 in step 103 (if data is stored in the memory as shown in FIG. Read the value I1). Next, in step 104, the temperature data T1 of the semiconductor 6A used for the inverter unit and the semiconductor 6B used for the converter unit operable during the cooling operation are stored in the memory 12 (step 104).
Read more. In step 105, the data I1 read in step 103 and the semiconductor protection temperature T1 are set as the cooling control current value. Similarly, when the heating operation mode is selected, data is set in steps 106 to 108.

In step 109, the temperature data TH1 is taken from the fin temperature thermistor 8 which detects the temperature of the heat sink 7 to which the semiconductors 6A and 6B are attached. In step 110, the semiconductor protection temperature T1 set in step 105 or 108 is compared with the fin temperature thermistor 8 temperature TH1. If the temperature of the temperature sensor TH1 is lower than the protection temperature T1, the control is continued and step 11 is performed.
Proceed to 6. Step 11 if higher than the protection temperature T1
Proceed to 1 to determine the operation mode.

When the cooling operation mode is selected, the process proceeds to step 112, where the cooling protection current (A) I3 set to a current value lower than the normal operation current in the cooling operation mode is read from the memory 12. In step 113, the cooling protection current (A) I3 is set as the cooling control current. Similarly, in the heating operation mode, settings are made in steps 114 and 115.

Next, at step 116, the operation mode is determined. Step 1 when the cooling operation mode is selected
The program then proceeds to step 17 where the operable temperature T3 around the control board is read from the memory 12 during the cooling operation. In step 118, the protection temperature is set to the protection temperature T3. Similarly, in the heating operation mode, settings are made in steps 119 and 120. Next, in step 121, the temperature data TH2 is fetched from the substrate temperature thermistor 9, which detects the ambient temperature of the control substrate 5. At step 122, the protection temperature T3 of the control board 5 set at step 117 or 119 is compared with the temperature TH2 of the fin temperature thermistor 8. If the temperature is higher than the protection temperature T3, the process proceeds to step 123, and the same processing as steps 111 to 115 is performed.

By the above operation, the influence of the outside air temperature and the heat exchange by the outside wind are given to the semiconductors of the converter unit and the inverter unit mounted on the air conditioner and to the control circuit unit for each operation mode. It is possible to protect the heat from the deterioration of the efficiency and the deterioration of the air path due to dust and the like, and to provide a highly reliable air conditioner.

More specifically, for example, when the cooling operation mode and the heating operation mode are compared, since the indoor and outdoor temperature co-heating operation mode is generally lower than the cooling operation mode operation, the semiconductor 6 and the control board 5 It is in an environment where it is easily cooled by temperature even if the temperature is high. Therefore, T1 and T1 in FIG.
2, the relationship between T3 and T4, the relationship between T5 and T6, and the relationship between T7 and T8 is T1
As in <T2, T3 <T4, T5 <T6, and T7 <T8, even if the protection temperature in the heating operation mode, which is easily cooled by the air temperature, is set slightly higher than the protection temperature in the cooling operation mode, the control device is not affected. In this manner, stable operation can be performed, and it is possible to prevent excessive heat protection from being performed during the heating operation and reduce the performance of the compressor.

Conversely, in the case of an air conditioner having a variable compression function such as an inverter, the maximum frequency is generally higher in the heating operation mode than in the cooling operation mode. Therefore, semiconductor 6
And the temperature of the control board 5 tends to increase. Therefore, T in FIG.
1 and T2, T3 and T4, T5 and T6, and T7 and T8, T1> T2, T3> T4, T5> T6, and T7> T8. If the protection temperature in the heating operation mode is set slightly lower than the protection temperature in the cooling operation mode, stable operation can be performed according to the characteristics of the operation mode. It is possible to prevent the ability from being lowered.

As described above, the frequency range of the compressor generally differs between the heating operation mode, the cooling operation mode, and the dehumidification operation mode, and the upper limit frequency is particularly high in the order of heating, cooling, and dehumidification. Therefore, the relationship between I1 and I2 is I1 <I2
It is. When the cooling operation mode and the heating operation mode are compared, the temperature in the indoor / outdoor temperature co-heating operation mode is lower than that in the cooling operation mode operation, so that the semiconductor 6 and the control board 5 are easily cooled by the air temperature even when the temperature is high. In the environment.
Therefore, the relationship between I3 and I4 and the relationship between I5 and I6 are expressed as I3 <I4,
Even if the protection current value in the heating operation mode that is easily cooled by the air temperature is set slightly larger than the protection current value in the cooling operation mode as in the case of I5 <I6, stable operation can be performed without hindering the control device. Excessive thermal protection during the heating operation can be prevented from lowering the capacity of the compressor.

Further, when the control device is arranged in the outdoor unit of the separate type air conditioner, the outdoor temperature in the heating operation mode is sufficiently lower than that in the cooling operation, and the heat is exchanged through the outdoor heat exchanger. Since the cool air is blown around the outdoor unit, the cooling effect by the air temperature in the heating operation mode and the cooling operation mode is greater in the heating operation, so
The effect of setting the upper limit based on the operation mode as described above is remarkable.

With the above configuration and control, excessive heat protection is reduced, and comfortable air conditioning according to the operation mode can be performed. The relationship between the current I and the temperature T in FIG. 6 can be implemented by combining the above-described specific examples.
Alternatively, comfortable air conditioning can be performed by dividing the other upper limit value based on the operation mode without providing a difference in the upper limit value for one of the temperatures T based on the operation mode.

Further, in the above embodiment, T1 and T2, which are the criteria for determining whether to shift to I3 and I4, are respectively one. For example, T1 and T2 are replaced with T1-1 and T1-1, respectively.
, T2-1, T2-2,..., A plurality of threshold values are provided, and I1 to I2
3 or I5, I2 may be shifted to I4, I6, or the like. In this case, T1-1, T1-2,...
T2-1, T2-2,... Can control such that the upper limit value is changed in accordance with the degree of heat generation, and the upper limit of the current is strictly limited when the heat generation temperature changes rapidly.

Embodiment 2 Next, a second embodiment of the present invention will be described. FIG. 8 is a control flowchart showing the operation of the second embodiment. Other configurations are the same as those of the first embodiment shown in FIGS. 1 to 4 and 5. Hereinafter, description will be made with reference to FIG. Step 201
The microcomputer 11 mounted on the outdoor unit controller receives the serial signal from the indoor unit, and determines the operation mode of the air conditioner in step 202. If the operation is the cooling operation, the process proceeds to step 203; if the operation is the heating operation, the process proceeds to step 206.
Proceed to.

When the cooling operation mode is selected, the current value I1 to be controlled during the cooling operation is read from the memory 12 at step 203. In step 205, the data I read in step 103 as the cooling control current value
Set 1. Similarly, when the heating operation mode is selected, data is set in steps 206 to 208.
In step 209, ON / OFF of the overload bit transmitted when the indoor unit room temperature is higher than the serial signal is determined. When the overload bit is OFF, control is performed with the normal current indicated by the cooling control current.

If the overload bit is ON, step 21
Go to 0. In step 210, the operation mode is determined. If the operation mode is the cooling operation mode, the process proceeds to step 211, in which the cooling protection current (A) I3 set to a current value lower than the normal operation current in the cooling operation mode is read from the memory 12. . In step 212, the cooling protection current (A) I3 is set as the cooling control current. Similarly, in the heating operation mode, in steps 213 and 214, the heating protection current (A) I4 is read and set. By the above operation, although the level of protection coordination is lower than in the first embodiment, a highly reliable air conditioner can be provided without increasing parts and the like.

Embodiment 3 Next, a third embodiment of the present invention will be described. FIG. 9 is a control flowchart showing the operation of the third embodiment. Hereinafter, description will be given with reference to FIG. Steps 301 to 315 correspond to steps 101 to 115 of the first embodiment, and are the same control, and thus description thereof will be omitted. Step 321
Again, the temperature of the radiator plate 7 is set to T from the fin temperature thermistor 8.
Import as H5.

At step 322, the temperature taken again and the protection temperature T1 are compared. When the temperature of the temperature sensor TH5 is lower than the protection temperature T1, the control proceeds to the next control. If the temperature is higher than the protection temperature T1, the process proceeds to step 323 to determine the operation mode. If the cooling operation mode is selected, the process proceeds to step 324, where the memory 12 reads the cooling protection current (A) I5 set to a current value lower than the cooling protection current (A) I3 in the cooling operation mode. In step 325, the cooling protection current (A) I5 is set as the cooling control current. Similarly, in the heating operation mode, settings are made in steps 326 and 327.

By the above operation, the heat protection from the influence of the outside air temperature, the deterioration of the heat exchange rate due to the outside wind, the deterioration of the air path due to dust and the like is further improved in each of the operation modes. An effect can be expected and a highly reliable air conditioner can be provided.

Embodiment 4 Next, a fourth embodiment of the present invention will be described. FIG. 10 is a control flowchart showing the operation of the fourth embodiment. Hereinafter, FIG.
Description will be made along 0. Steps 401 to 415 correspond to steps 101 to 115 of the first embodiment, and have the same control, and thus the description thereof will be omitted. Step 41
At step 6, the temperature of the radiator plate 7 is taken in again from the fin temperature thermistor 8 as TH6.

In step 418, the temperature taken again and the protection temperature T1 are compared. When the temperature of the temperature sensor TH6 is lower than the protection temperature T1, the control proceeds to the next control. If the temperature is higher than the protection temperature T1, the process proceeds to step 418, and the operation mode is determined. If the cooling operation mode is selected, the process proceeds to step 419, where the current change amount I7 is read from the memory 12. In step 420, a value obtained by subtracting the current change amount I7 from the cooling control current is set as the cooling control current. Similarly, in the heating operation mode, step 4
21 and 422 are set.

By the operation described above, an air conditioner can be provided in which the same effect as that of the third embodiment can be obtained with a configuration in which the data stored in the memory 12 is reduced.

Embodiment 5 FIG. Next, a fifth embodiment of the present invention will be described. FIG. 11 is a control flowchart showing the operation of the fifth embodiment. Hereinafter, FIG.
1 will be described. Step 501 shows steps 101 to 127 shown in the first embodiment. Step 502
Again, the temperature of the radiator plate 7 is set to T from the fin temperature thermistor 8.
Import as H7. In step 503, the temperature taken again and the protection temperature T1 are compared.

When the temperature of the temperature sensor TH7 is higher than the protection temperature T1, the control proceeds to the next control. Protection temperature T
If it is lower than 1, the process proceeds to step 504, and the operation mode is determined. If the cooling operation mode has been selected, the routine proceeds to step 505, where the cooling control current is set to the cooling normal current (A) I1, which is the initial state. Similarly, in the heating operation mode, the setting is performed in step 506.

According to the above operation, when the external state returns to the normal state, such as a decrease in the outside air temperature, it is possible to provide an air conditioner which automatically returns to the current value at which the original operation can be performed and exhibits the maximum performance. Things.

Embodiment 6 FIG. Next, a sixth embodiment of the present invention will be described. FIG. 12 is a control flowchart showing the operation of the sixth embodiment. Hereinafter, FIG.
Explanation will be made along 2. Step 601 indicates steps 301 to 327 shown in the third embodiment. Step 602
Again, the temperature of the radiator plate 7 is set to T from the fin temperature thermistor 8.
Import as H8.

In step 603, the temperature taken again and the protection temperature T1 are compared. If the temperature of the temperature sensor TH8 is higher than the protection temperature T1, the control proceeds to the next control. If the temperature is lower than the protection temperature T1, the process proceeds to step 604, and the operation mode is determined. If the cooling operation mode has been selected, the routine proceeds to step 605, where the cooling control current is set to the cooling protection current (A) I3. Similarly, in the heating operation mode, the setting is performed in step 606. Then step 6
At 07, the temperature of the heat sink 7 is taken in again from the fin temperature thermistor 8 as TH 9.

In step 608, the temperature taken again and the protection temperature T1 are compared. If the temperature of the temperature sensor TH8 is higher than the protection temperature T1, the control proceeds to the next control. If the temperature is lower than the protection temperature T1, the process proceeds to step 609 to determine the operation mode. If the cooling operation mode is selected, the process proceeds to step 610, where the cooling control current is set to the initial cooling normal current (A) I1. Similarly, in the heating operation mode, setting is performed in step 611.

According to the above operation, when the external state such as a decrease in the outside air temperature returns to the normal state, the air conditioner can be provided which gradually returns to the current value at which it can be operated and exhibits the maximum performance. Things.

[0052]

As described above, according to the present invention, in an air conditioner provided with a control device for controlling the operating current and the like of a compressor incorporated in a refrigeration cycle, the temperature of a heat-generating component provided in the control device is controlled. And current limiting control means for limiting the upper limit of the operating current based on the detected temperature and the operating mode of the detecting means, so that thermal protection is provided for each operating mode having a different external environment. Becomes possible,
The effect that a comfortable and highly reliable air conditioner can be provided is obtained.

Further, since the control device is disposed in the outdoor unit of the separate type air conditioner, it is possible to obtain an effect of reducing excessive heat protection and providing a comfortable and highly reliable air conditioner.

Further, in an air conditioner provided with a control device for controlling the operating current and the like of a compressor incorporated in a refrigeration cycle, an overload detecting means for detecting an overload, information on the detected overload and an operation mode are provided. Current limiting control means for restricting the upper limit of the operating current based on the above, so that heat protection can be performed for each operation mode having a different external environment, and a comfortable and highly reliable air conditioner can be provided at low cost. The effect is obtained.

Further, the current limiting control means limits the operating current to the upper limit value which differs for each operation mode, so that the effect of extracting the capacity of the compressor can be obtained.

In addition, the current limit control means determines whether or not the detected temperature or the overload information for limiting the upper limit value of the operating current differs for each operation mode. Is obtained.

Further, since the current limit control means changes the upper limit of the operating current based on the detected temperature or the overload information, it is possible to reduce the excessive limitation of the operating capacity and to provide the effect of reliable thermal protection. can get.

Further, the current limit control means changes the upper limit of the operating current based on the detected temperature or the overload information after the upper limit of the operating current. The effect that becomes possible is obtained.

When the detected temperature or the overload information after the upper limit of the operating current is not improved, the current limiting control means further lowers the operating current or stops the operation. The effect is obtained that the protection can be reduced and the compression function can be drawn out according to the operation mode.

The current limit control means raises the upper limit of the operating current when the detected temperature or the overload information after the upper limit of the operating current is improved, so that the thermal protection is excessively continued. , And the effect that the capacity of the compressor can be brought out can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective plan view and a front view showing an outdoor unit of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an electric component box mounted on the outdoor unit of the air conditioner according to the embodiment of the present invention.

FIG. 3 is a front view showing a control board and a radiator plate housed in an electric component box of the air conditioner according to the embodiment of the present invention.

FIG. 4 is a block diagram illustrating an operation relationship of the control device according to the embodiment of the present invention.

FIG. 5 is a flowchart illustrating an operation according to the first embodiment of the present invention.

FIG. 6 is a memory data table for explaining an operation in the embodiment of the present invention.

FIG. 7 is a timing chart illustrating an operation according to the embodiment of the present invention.

FIG. 8 is a flowchart illustrating an operation according to the second embodiment of the present invention.

FIG. 9 is a flowchart illustrating an operation according to the third embodiment of the present invention.

FIG. 10 is a flowchart illustrating an operation according to the fourth embodiment of the present invention.

FIG. 11 is a flowchart illustrating an operation according to the fifth embodiment of the present invention.

FIG. 12 is a flowchart illustrating an operation according to the sixth embodiment of the present invention.

FIG. 13 is a circuit configuration diagram showing a conventional air conditioner control device.

[Explanation of symbols]

1 Outdoor unit, 2 Compressor, 3 Outdoor fan, 4 Electrical box, 5 Control board, 6 Semiconductor, 6A Inverter section semiconductor, 6B Converter section semiconductor, 7 Heat sink, 8
Fin temperature thermistor, 9 Substrate temperature thermistor, 10
Control circuit, 11 microcomputer, 12 memory.

Continuation of the front page (72) Inventor Yoshihiko Yoshikawa 2-6-1, Otemachi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Engineering Co., Ltd. (72) Inventor Yoshihiro Iwasaki 2-6-1, Otemachi, Chiyoda-ku, Tokyo 3 Inside Rishi Electric Engineering Co., Ltd. (72) Inventor Makoto Tanigawa 2-6-1, Otemachi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Engineering Co., Ltd. (72) Hiroaki Suzuki 2-5-2, Otemachi, Chiyoda-ku, Tokyo No. Mitsubishi Electric Engineering Co., Ltd. (72) Inventor Masato Mori 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Isao Kawasaki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation F-term (reference) 3L060 AA01 CC01 DD05 EE04 3L061 BA07

Claims (9)

[Claims] In an air conditioner provided with a control device for controlling an operating current and the like of a compressor incorporated in a refrigeration cycle, detection means for detecting a temperature of a heat-generating component provided in the control device, An air conditioner comprising: current limit control means for limiting an upper limit of the operation current based on a detected temperature and an operation mode. 2. The air conditioner according to claim 1, wherein the control device is disposed in an outdoor unit of a separate type air conditioner. 3. An air conditioner having a control device for controlling an operation current and the like of a compressor incorporated in a refrigeration cycle, comprising: an overload detecting means for detecting an overload; An air conditioner, comprising: a current limiting control unit that limits an upper limit of the operating current based on the operating current. 4. The air conditioner according to claim 1, wherein the current limit control unit limits the operation current to an upper limit value that differs for each operation mode. 5. The air conditioner according to claim 1, wherein the detected temperature or the overload information for limiting an upper limit value of an operation current is different for each operation mode. Machine. 6. The air conditioner according to claim 1, wherein the current limit control means changes an upper limit of an operation current based on the detected temperature or the overload information. 7. The system according to claim 6, wherein the current limit control means changes the upper limit of the operating current based on the detected temperature or the overload information after the upper limit of the operating current.
The air conditioner as described. 8. The current limiting control means further reduces the upper limit of the operating current or stops the operation when the detected temperature or the overload information after the upper limit of the operating current is not improved. The air conditioner according to claim 7. 9. The air according to claim 7, wherein the current limit control means increases the upper limit of the operating current when the detected temperature or the overload information after the upper limit of the operating current is improved. Harmony machine.