KR100407653B1 - Air conditioner control device - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a control device of an air conditioner.

2. The technical problem to be solved by the invention

An object of the present invention is to control the air conditioner to automatically and continuously select an appropriate air volume effectively by detecting room temperature, and to select a temperature sensor located at another position when the air volume of the indoor air blower is automatically controlled. To provide.

3. Summary of Solution to Invention

The control device of the air conditioner selects a blowing amount control means in accordance with a signal and changes the blowing amount in multiple stages, and the blowing amount based on the difference between the room temperature and the set temperature detected by the first temperature sensor 36. A first signal generating means for automatically changing a signal sent to the control means and a signal sent to the air flow control means based on a difference between the room temperature and the set temperature detected by the second temperature sensor 55; Based on the comparison between the second signal generating means and the room temperature detected by the first temperature sensor 36 used by the compressor 1 for operation control and the room temperature detected by the second temperature sensor 55; Switching means for validating either the signal generating means or the second signal generating means.

4. Important uses of the invention

When the first temperature sensor and the second temperature sensor detect a temperature at a different place, even if these temperature sensors are effectively used for the control of the compressor, the blowing amount of the indoor blower is automatically adjusted for different characteristics for each of these temperature sensors. It is possible to change, and the optimum automatic blowing is performed according to the temperature sensor which becomes effective.

Description

Control Unit of Air Conditioner

(Industrial use)

The present invention includes a first temperature sensor for detecting a temperature above the artificial chamber and a second sensor for detecting a room temperature below the room temperature detected by the first temperature sensor, according to the operation state of each temperature sensor. A control apparatus for an air conditioner that performs operation control by validating a temperature sensor on a side indicating an optimal state.

(Conventional technology)

The control apparatus of the conventional air conditioner is a room temperature detected by one of the first temperature sensor (temperature sensor installed above the operation chamber) or the second temperature sensor (temperature sensor installed below the operation chamber). On the basis of this, a signal indicative of the blowing amount supplied to the blowing amount control means was automatically obtained, and the blowing amount by the blowing device was automatically changed.

In the conventional air conditioner control device configured as described above, stable air volume control is achieved when the temperature sensor (the first temperature sensor or the second temperature sensor) on the selected side is always operating normally.

However, if an abnormality occurs somewhere, for example, when sunlight directly touches the temperature sensor, when blowing air from the air conditioner directly touches the temperature sensor, or when the temperature sensor is located under the influence of a heating element or a coolant, When the temperature sensor could not normally detect the room temperature of the operation chamber, and when the air convection in the operation chamber was stagnant and the room temperature difference between the upper and lower parts in the operation chamber became large, the proper airflow amount was not maintained.

(Problem that the invention wants to solve)

In order to solve this problem, the present invention provides a control device for an air conditioner that automatically selects a temperature sensor that does not cause an abnormal condition based on the room temperature detected by at least two temperature sensors, so that the air volume is appropriately switched at all times. to provide.

The control device of the air conditioner of the present invention includes a refrigeration cycle in which a compressor, a condenser, a decompression device, and an evaporator are connected to the refrigerant pipe in an annular order, so that the cooling operation of the operation room is made possible by the endothermic action of the evaporator. A first temperature sensor that detects the room temperature above the artificial chamber and a second sensor that detects the room temperature below the room temperature detected by the first temperature sensor, and the first temperature sensor And a blower for supplying air cooled by the evaporator to the operation chamber, by appropriately selecting the room temperature detected by the second temperature sensor and the room temperature detected by the second temperature sensor so as to be used for the operation control of the compressor. On the basis of the difference between the room temperature and the set temperature detected by the first air temperature sensor and the air volume control means for changing the air volume of the apparatus in multiple stages according to the signal; A first signal generating means for automatically changing a signal sent to said airflow control means, and a signal sent to said airflow control means automatically based on a difference between a room temperature and a set temperature detected by said second temperature sensor The first signal generating means or the first signal generating means based on a comparison between the room temperature detected by the first temperature sensor used for operation control of the compressor and the room temperature detected by the second room temperature sensor. It is provided with a switching means which makes any one of the signal generation means of 2 effective.

According to the present invention, when an abnormality occurs in the room temperature detected by the first temperature sensor or the second temperature sensor, the temperature sensor on the side suitable for the control of the air conditioner is automatically selected and the selected temperature sensor is The blowing amount of the blower can be automatically changed based on the detected room temperature.

(Means to solve problems)

An embodiment of the present invention will be described below with reference to the drawings.

1 is a refrigerant circuit diagram showing a refrigeration cycle of an air conditioner used in an embodiment of the present invention, each of which is an outdoor unit disposed outdoors and an indoor unit disposed in the operation chamber. It is divided into and mounted.

In the figure, reference numeral 1 denotes a compressor, reference numeral 2 denotes a condenser, reference numeral 3 denotes an outdoor blower, and is installed at a position to blow air to the condenser 2. (4) is a pressure reducing device (for example, capillary tube), (5) is a strainer, which removes impurities such as dust and sludge in the refrigerant circuit.

(6) is an evaporator, (7) is an indoor side blower, and is installed in the position which blows air to the evaporator 6. As shown in FIG. (8) is a noise muffler, (9) is an accumulator.

The outdoor unit is equipped with a compressor (1), a condenser (2), a blower (3), a pressure reducing device (4), a strainer (5), a noise muffler (8), and an accumulator (9). (6), a blower (7) is mounted, connected between the outdoor unit and the indoor unit by a refrigerant pipe, and a refrigerant cycle using these components is configured.

(10), (11), (12) and (13) are valves to which refrigerant pipes for connecting the outdoor unit and the indoor unit are connected, respectively.

In constructing the refrigerating cycle by using the above components, the refrigerant discharged from the compressor 1 circulates through the refrigerant cycle along the solid arrows shown in FIG. First, the high temperature and high pressure gas refrigerant compressed in the compressor is condensed in the condenser 2 to form a low temperature and high pressure liquid refrigerant. At this time, the outdoor blower 3 (consisting of a condenser-type single-phase induction motor and a propeller fan driven by the induction motor) blows the outside air to the condenser 2 to blow up the condenser 2. It cools and improves the condensation efficiency of the refrigerant | coolant in the condenser 2. The refrigerant liquefied in the condenser (2) passes through a strainer (5) as it is compressed under a pressure reducing device (4) (capillary tube or expansion valve) and evaporator (6). In the evaporator 6, an endothermic action by gasification of the refrigerant, i.e. evaporation, takes place.

The evaporator 6 includes an indoor blower 7 (a condenser-type single-phase induction motor whose rotational speed is changed at a rotational speed of about three stages of steel, medium, and a cross flow fan driven by the induction motor). Is provided, and the air in the chamber is cooled by circulating air in the chamber. That is, the cooling operation of the to-be-generated chamber is performed.

At this time, the refrigerant is not completely evaporated in the evaporator 6 due to the room temperature of the operation chamber, the outside air temperature (or the refrigerant temperature before evaporation), and the blowing amount of the indoor blower 7 (the rotational speed of the induction motor). The refrigerant after exiting the evaporator is a mixture of gas and liquid. The refrigerant in the mixed state of the gas and the liquid is led to the accumulator 9 through the silencer 8, and the gas liquid is separated from the accumulator 9 so that only the gas refrigerant is again compressed ( It is sucked into 1) to circulate the refrigeration cycle.

FIG. 2 is a schematic diagram showing a control circuit for driving the compressor 1, the outdoor side blower 3, and the indoor side blower 7 of the refrigeration cycle shown in FIG. This control device is composed of a part (upper half side shown in FIG. 2) mounted on an indoor unit and a part (lower half shown in FIG. 2) mounted on an outdoor unit, each of which comprises a terminal 20, It is electrically connected to the terminal 21 and the signal line 22 which connects between these terminals.

Reference numeral 23 denotes a power relay installed in an outdoor unit, and in case of abnormality, the open contact members 23a and 23b are energized by the coil 23c connected to the terminal ② of the terminal 21 and the terminal ④. While closed. The normally open contact members 23a and 23b are closed, so that the overload protection of opening the circuit when the current flowing through the compressor 1 and the compressor 1 between the terminal ① and the terminal ② of the terminal 21 exceeds a predetermined value is achieved. The temperature protection device 25 which opens a circuit when the case temperature of the apparatus 24 and the compressor 1 exceeded the predetermined value is connected in series.

Therefore, when the single-phase AC power is supplied between the terminal ① and the terminal ② of the terminal 21, the coil 23c is energized so that the normally open contact members 23a and 23b are closed, thereby operating the compressor 1. This is done. 1a is a condenser for operation of the compressor 1.

In addition, the normally open contact members 23a and 23b are closed to simultaneously operate the outdoor air blower 3 connected in series between the terminal ① and the terminal ② of the terminal 21. 3a is a condenser for operation of the outdoor blower 31.

Therefore, when electric power (driving signal) is supplied between the terminal ② of the terminal 21 and the terminal ④, the coil 23c is energized, and the upper connection pieces 23a, 23b are closed, and the compressor 1 and the outdoor unit are closed. The side blower 3 is operated.

Numeral 30 denotes a control unit, which is mainly composed of a microcomputer (for example, TMS73C161 manufactured by Intel Corporation), an interface for transmitting various data to the microcomputer, and an interface for outputting signals for controlling the device. And power circuit.

The control unit 30 is connected with a plug 31 connected to the single-phase AC power supply, and the AC power obtained through the plug 31 is used for control not shown in the terminals ① and ② of the terminal 20. The alternating current power is supplied through a normally open contact member (controlled by a microcomputer to open and close) of the power relay, and the alternating current power is passed through a current fuse (not shown) to the first side 32a of the step-down transformer 32. After being supplied to the microcomputer, a louver motor after the DC constant voltage is returned from the secondary transformer 32b of the transformer 32 to the control unit 30 through a noise filter 33. 34, used as an operating power source for an interface circuit and the like.

The louver motor 34 is a motor for periodically changing the discharge direction when returning the rough air cooled in the evaporator 6 to the conditioning chamber, and the direction of the wind direction flaps by the motor is periodically changed. do.

Further, the AC power is supplied between the speed regulating terminal (H: high speed, M: medium speed, L: low speed) of the single-phase induction motor constituting the indoor blower 7 and the terminal COM. The microcomputer also controls a relay matrix (not shown) with this output to control the AC power between one of the H / M / L stops (not connected to any speed control terminals) of the speed control terminal and COM. To supply. 7a is a capacitor for operation of this single-phase induction motor.

Reference numeral 35 denotes a temperature sensor for detecting the temperature of the evaporator 6, and 36 denotes a first temperature sensor for detecting the room temperature of the operation chamber, and detects an indoor air temperature sucked by the indoor blower 7. It is located in a position where it can be done. In addition, since the indoor unit is usually installed above the room, it is possible for the first temperature sensor to detect the room temperature above the artificial chamber. These temperature sensors are connected to a microprocessor in the control unit 30. The microprocessor converts the temperature and room temperature detected by these temperature sensors into A / D (analog / digital), and then controls the temperature or room temperature values. I use it.

Reference numeral 37 is a switch substrate, and a slide switch for switching ON / OFF / TEST (state in which operation is performed with a signal transmitted from the remote controller 39 / non-operation state / test run state). (slide switch) and a lamp indicating operation and a lamp showing a timer operation state are mounted, and the microcomputer determines the state of the slide switch as key scanning and uses it for operation control. In addition, the lamp indicating the operation state and the lamp indicating the timer operation state are dynamically lit by signals output by the microcomputer as needed.

The switch board 37 is provided with a light receiving unit 38 of an infrared signal, and receives a wireless signal (an infrared signal or a wireless signal) transmitted from the remote controller 39 and outputs the received signal to the microcomputer. do. For example, in the case of a modulated serial infrared signal, the infrared signal is demodulated and then output to the microcomputer as a serial signal. The microcomputer converts this serial signal into a control code and then performs operation control based on this control code.

3 is a top view of a state in which the switch cover 39a of the remote controller 39 is slid in the direction of the solid arrow. In this figure, reference numeral 52 denotes a liquid crystal display, which displays various operation information such as a set temperature, a blow amount of the indoor blower 7, a timer operation state, and the like.

Reference numeral 53 is an operation switch for one hour, and when this switch is operated, a signal including a control code for operating the air conditioner for only one hour from this operation is transmitted from the light emitting unit 58 to the light receiving unit 38. Transmitted as a modulated infrared signal.

Numeral 57 is an operation switch, and each time the operation is performed, the memory state in the remote controller is switched to the operation / stop of the air conditioner, and then a signal containing a control code corresponding to this memory state is output to the light emitting unit 58. Is transmitted to the light receiving unit 38. That is, each time the operation switch 57 is operated, a signal for switching the operation / stop of the air conditioner is output.

The remote controller 39 is provided with a second temperature sensor therein, and detects the temperature around the remote controller 39 at predetermined intervals (for example, every minute). The room temperature is stored internally. This temperature is transmitted as a code indicating room temperature at the same time when a signal is transmitted from the light emitting unit 58 to the light receiving unit 38 in response to the operation of the switches, and the remote controller 39 performs " operation " When the memory is stored, it is automatically transmitted as a regular signal from the light emitting unit 58 to the light receiving unit 38 as a code indicating a room temperature automatically every predetermined period (for example, every 3 minutes).

62 is a changeover switch of the operation mode, and switches the air conditioner to cooling operation / blowing operation each time it is operated. When this switch is operated, the state is stored inside the remote controller similarly to the operation switch 57, and the control code is transmitted from the light emitting unit 58 to the light receiving unit 38.

Reference numeral 63 denotes a flap switch, which sets whether or not the louver motor 34 is driven and has the same signal transmission function as the changeover switch 62 in the operation mode.

Numeral 64 denotes a fan speed selector switch, that is, an air volume change switch of the indoor blower 7, and the state stored in the remote controller 39 at each operation is H: high speed, M: medium speed, and L. : Low speed, A: Automatic conversion. This switch 64 has the same signal transmission function as the changeover switch 62 in the operation mode.

Reference numeral 66 denotes an ON timer setting switch, 67 an OFF timer setting switch, and when these switches are operated, the display of the liquid crystal display 52 is first switched from the set temperature to the time display. Next, when the down switch 54 and the up switch 56 are operated, the set time of timer operation is returned or advanced. When the set time reaches the desired time, the timer is set by pressing the timer set switch 68. By operating this switch 68, the same signal transmission function as the switch 62 in the operation mode is obtained.

Reference numeral 69 denotes a night setback switch, and by operating the switch, a signal including a code indicating a control for enabling the night setback function is transmitted, such as a switch 62 in the operation mode. The night setback function resets the set temperature stored by the microcomputer in the control unit 30 after 30 minutes from the time when the compressor 1 is stopped due to a thermo cycle (valid change between the effective room temperature and the set temperature). It raises 1 degreeC, and after the compressor 1 operation | moves next, 30 minutes after the time when the compressor 1 stops again, the set temperature memorize | stored by a microcomputer is raised 1 degreeC again. Therefore, the set temperature is increased by 2 ° C in total.

Reference numeral 71 denotes an all clear switch, which resets the signal transmission microcomputer built in the remote controller 39. When this switch 71 is operated, various values stored in the remote controller 39 are switched back to a predetermined initial value.

4 is a flow difference showing the main operation of the air conditioner using the present invention. In this figure, first, when the microcomputer of the control part 30 starts operation in step S1, each value stored in the memory | storage part and the setting value of each apparatus are initialized in step S2. For example, the operation mode is an initial setting such as a cooling operation, a set temperature of 27 degrees, a setting of the air blowing amount of the indoor side blower 7, automatic, a stop state of the operation of the air conditioner, and the like.

Next, in step S3, it is judged whether or not the switch of the switch board has been operated (determination of whether or not the switch position has changed). When operation of the switch is judged in this step S3, it progresses to step S4 (setting of a driving mode), and it moves an air conditioner to the state corresponding to the position of this switch. For example, when ON is selected, operation is performed by a signal transmitted from the remote controller 39. When OFF is selected, the air conditioner is kept in a stopped state (do not use the air conditioner for a long time. Not set), and if TEST is selected, a test run is performed. In addition, the trial run is canceled when this switch is turned ON or OFF, or when the operation signal from the remote controller 39 is received.

Then, the process proceeds to the switch S5 or less. The following steps are for when the switch is ON. In step S5, it is determined whether or not the wireless signal is received from the remote controller 39. When the wireless signal is received, the flow advances to step S6, and the timer is first reset (count value is reset to the beginning). .

Next, whether or not the wireless signal received in step S7 is a regular signal (a signal representing the value of room temperature detected by the second temperature sensor 55 in the step of automatically transmitted from the remote controller every predetermined period during operation). Make a judgment. If the signal is a regular signal, the process proceeds to step S9, where the room temperature value stored in the storage unit is switched back to the room temperature detected by the second temperature sensor. Then, the flow advances to step S12.

If it is determined that the radio signal received in step S7 is not a regular signal (a signal transmitted from the remote controller when any switch of the remote controller 39 is operated), the flow proceeds to step S8. In this step S8, various settings are changed based on the signal transmitted from the remote controller 39. For example, start / stop operation of the air conditioner, start / stop operation of the lover motor, the latest value of the set temperature, the setting of the air volume (H: high speed, M: medium speed, L: low speed, A : Automatic switching). In addition, the room temperature value detected by the 2nd temperature sensor transmitted simultaneously at this time is switched in next step S9. The process then proceeds to step S12.

When the signal from the remote controller 39 is not received in step S5, the flow advances to step S10 to determine whether the timer is in a time UP state (which has reached a set value). When the timer is timer UP, i.e., after receiving a signal from the remote controller 39, the signal cannot be received from the remote controller 39 for a predetermined time or more (for example, 9 minutes to 10 minutes or more). The flow advances to step S11 to update the room temperature value stored in the storage unit to the room temperature detected by the first temperature sensor 36 again. By this step S10, it is determined whether to use the first temperature sensor 36 or the second temperature sensor 55 to switch the use, and a function corresponding to the switching means is obtained. Next, the flow advances to step S12.

Therefore, after an abnormal condition such that a signal from the second temperature sensor 55 is not obtained for a predetermined time or more occurs, the first temperature sensor 36 is automatically switched to the room temperature detected by the detection. When the signal from the remote controller 39 is obtained, the timer returns to the initial value in step S6 and automatically returns to the room temperature detected by the second temperature sensor 55 again.

If it is not determined in step S10 that the timer is UP, the flow advances to step S12. First, if the room temperature is higher than the set temperature by comparing the magnitude of the room temperature stored in the storage unit with the set temperature, the compression value (1) is turned on, and the room temperature is If it is lower than this set temperature, the compressor 1 is turned off. Moreover, in this ON / OFF switching, the OFF (operation stop) of the compressor 1 is forcibly held for 2 to 3 minutes until the high and low pressure difference in a refrigerating cycle becomes below predetermined pressure. In step S12, the ON / OFF of the louver motor, the control of the timer operation, and the like are simultaneously performed in accordance with the setting.

Next, in step S13, it is determined whether the air blowing amount of the indoor blower 7 is set to "automatic" (A: automatic switching). If it is not set to "automatic", the flow advances to step S14. The engraving pieces (not shown) of the relay are switched so that the blowing amount in 7) is the blowing amount (H: high speed, M: medium speed, L: low speed) stored in the storage unit.

In step S13, when the air blowing amount of the indoor side blower 7 is "automatic" (A: automatic switching), the flow proceeds to step S15. First, the room temperature used in step S12 is the first temperature sensor 36. It is judged whether it is room temperature detected.

When the room temperature detected by the first temperature sensor 36 is not used (when the second temperature sensor 55 is used), the temperature and characteristics shown in FIG. The air blowing amount is automatically selected, and a value indicating the selected air blowing amount (H: high speed, M: medium speed, L: low speed, stop) is stored in the storage unit, and a new set air amount is set. In step S14, the engraving members (not shown) of the relay are switched so that the air flow amount of the blower 7 is stored in the storage unit in the same manner as described above (H: high speed, M: medium speed, L: low speed, stop). . In other words, the function corresponding to the second signal generating means is performed.

In FIG. 5A, the solid line upwards shows the characteristic when room temperature is rising, and the solid line downwards shows the characteristic when room temperature is falling. The characteristics are changed when the room temperature rises and when the temperature decreases to prevent chattering at the time of switching the airflow amount.

In the case where the room temperature rises, the air flow amount is OFF (stop) at room temperature <the set temperature, the air flow amount at the set temperature ≤ room temperature <the set temperature + 2 is L (approx.), The set temperature + 2 ≤ the room temperature <the set temperature + The amount of air blown at 3 is M (medium), and the amount of air blown at the set temperature +3? When room temperature falls, a differential of 0.3 ° C to 0.5 ° C is set.

In another embodiment, when changing the blowing amount without setting such a differential, chattering can be substantially prevented by performing the same blowing amount for at least three minutes.

Next, when the room temperature detected by the first temperature sensor 36 is used, the blowing amount is automatically selected from the room temperature based on the temperature and characteristics shown in FIG. 5B in step S17, and a value indicating the selected blowing amount ( H: high speed, M: medium speed, L: low speed, stop) are stored in the storage unit, and a new set air volume is set. In step S14, the engraving members (not shown) of the relay are switched so that the air flow amount of the blower 7 is stored in the storage unit in the same manner as described above (H: high speed, M: medium speed, L: low speed, stop). . In other words, a function corresponding to the first signal generating means is performed.

Also in FIG. 5B, similarly to FIG. 5A, an upward solid line arrow is a characteristic when room temperature is rising, and a downward solid line arrow is a characteristic when room temperature is falling. When the room temperature rises and decreases, the characteristics are changed to prevent chattering at the time of airflow conversion.

When the room temperature rises, the air flow amount at room temperature <the set temperature is OFF (stop), and the air flow amount at the set temperature ≤ room temperature <the set temperature + 1 is L (about), the set temperature + 1 ≤ room temperature <the set temperature The blowing amount at +2 is M (medium), and the blowing amount at set temperature +2? Room temperature is (strong). When room temperature falls, the differential of 0.3 ° C to 0.5 ° C is set in the same manner as in FIG. 5A.

As yet another embodiment, without changing such differentials, chattering can be substantially prevented if the blowing amount is changed after maintaining the same blowing amount for at least one minute. This time "1 minute" is the room temperature (temperature above the to-be-generated chamber) which the 1st temperature sensor 36 detects than the temperature (temperature detected by a remote controller) which the 2nd temperature sensor 55 detects. Since the temperature change is quick, the air blowing amount in FIG. 5B is set more easily than in the characteristic in FIG. 5A.

After the air volume is switched in step S14, the flow advances to step S18, where the air conditioner checks for an abnormal state (e.g., the temperature of the evaporator 6 drops abnormally and does not freeze, etc.). The process is performed, and the flow returns to step S3 again.

As a control apparatus of the air conditioner comprised as mentioned above, the 1st temperature sensor 36 and the 2nd temperature sensor 55 for detecting room temperature are arrange | positioned so that the room temperature of the different height of a to-be-processed chamber can be detected, When the airflow amount is automatically changed, when the temperature sensor on the side of detecting the room temperature at a high position becomes effective, the airflow amount is easily changed.

Therefore, the air volume is automatically changed with different characteristics for each sensor, and optimal airflow control is always performed according to the height at which the temperature sensor is installed.

1 is a refrigerant circuit diagram showing a refrigerating cycle of an air conditioner according to an embodiment of the present invention.

2 is a schematic explanatory diagram of a control device for operating the refrigerant circuit shown in FIG.

3 is a front view of the remote controller shown in FIG.

FIG. 4 is a flowchart showing the main operation of the control device shown in FIG.

5A and 5B are characteristic explanatory diagrams explaining the relationship between the room temperature and the set temperature for determining the blowing amount of the indoor blower;

As described above, according to the present invention, when one temperature sensor and the second temperature sensor detect a temperature at a different place, even if any one of the temperature sensors is effectively used for controlling the compressor, the characteristics are different for each temperature sensor. By this means, it is possible to automatically change the air volume of the indoor blower, and optimal automatic airflow is always performed regardless of the effective temperature sensor.

Claims (3)

The compressor, the condenser, the pressure reducing device, and the evaporator are sequentially provided with a refrigerating cycle connected to the refrigerant pipe in an annular manner, and are configured to enable the cooling operation of the operation chamber by using the endothermic action of the evaporator. A first temperature sensor to be detected and a second temperature sensor to detect a room temperature below the room temperature detected by the first temperature sensor, wherein the room temperature and the second temperature sensor detected by the first temperature sensor are detected. A control apparatus for an air conditioner, which optimally selects a room temperature to be used for operation control of the compressor; A blower for supplying the air cooled by the evaporator to the conditioning chamber, a blower amount control means for changing the blower amount of the blower in multiple stages according to a signal, and a room temperature detected by the first temperature sensor and a set temperature; A first signal generating means for automatically changing a signal sent to said airflow control means based on a difference and a signal sent to said airflow control means based on a difference between a room temperature and a set temperature detected by said second temperature sensor; The first signal generation means based on a comparison between the second signal generation means which changes automatically and the room temperature detected by the first temperature sensor used for operation control of the compressor and the room temperature detected by the second temperature sensor. And a means for converting either the means or the second signal generating means into an effective condition. The method of claim 1, A control device for an air conditioner, characterized in that the characteristics of the first signal generating means are set so as to more easily convert the blowing amount. The method of claim 1, The second temperature sensor is constituted by a remote controller, and the switching means always makes the second signal generating means effective, but reception of a signal from the remote controller is performed for a predetermined time or And when it is prevented for longer, the first generating means is made effective.