JPH07110169A - Air conditioning system using absorption refrigerator - Google Patents

Abstract

PURPOSE:To prevent a flashing phenomenon and to enable a stable operation to be carried out by a method wherein a reduction in cooling capacity against a condenser caused by an aging deterioration of cooling fins or damaged clogging at the cooling fins is detected in response to a variation of the number of rotation in an air-cooled fan to inform a user of a clogged state in the cooling fins. CONSTITUTION:A controller 30 controls each of a blower fan 11, an air-cooled fan 17, a pump 23, a control valve 15 in a fuel supplying pipe 14, various valves V1 to V5 and an alarm lamp 33 in response to various sensing signals produced from various sensors T1 to T6 arranged outside an outdoor device and output signals produced form a communication control device 31. At this time, the controller 30 stores an appropriate number of rotation of the air-cooled fan 17 for keeping a temperature at an outlet of a condenser 16 constant in response to a heating amount of a regenerator 12 as well as a surrounding air temperature, an actual number of rotation of the air-cooled fan 17 and a time-series variation data in the actual number of rotation. In the case that the variation data exceeds a specified value, a clogged state in the cooling fan at the condenser 16 is set to be alarmed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner using an absorption refrigerating machine for general houses and small buildings.

[0002]

2. Description of the Related Art At present, an air conditioner using an absorption chiller is mainly used for industrial or commercial facilities such as a building or a large store.

In a cooling system of an air conditioner using an absorption refrigerator, a refrigerant vapor evaporated in a regenerator is condensed in a water-cooled condenser, and the condensed refrigerant is guided to an evaporator for evaporation. The cooling heat medium (usually water) that circulates between the fan coil unit provided in the room to be air-conditioned and the refrigerator is cooled by the latent heat of vaporization. On the other hand, the evaporated refrigerant vapor is operated in a cycle in which a water-cooled absorber absorbs the concentrated solution (absorption liquid) and returns it to the regenerator.

In an air conditioner using this type of absorption refrigerator, the temperature of the cold heat medium circulated in the indoor fan coil unit is cooled to around 7 ° C. in the evaporator, and the cold heat medium is circulated in the indoor fan coil. It is circulated to cool the indoor air and return it to the evaporator at around 12 ° C. When using an aqueous lithium bromide solution as the absorbing liquid, it is necessary to maintain the temperature of the absorbing liquid in the absorber at around 40 ° C. To maintain this temperature, a cooling tower is installed on the rooftop or the like, and the water cooling circuit is installed. The method of cooling is adopted.

However, the conventional air conditioner using the absorption type refrigerating machine adopting such a water cooling system has the following problems.

(1) Since the temperature of the absorber is controlled by a water cooling system, the equipment becomes large and piping is required. Therefore, a lot of construction cost is required, which is a problem for general houses and small buildings. Not suitable for cooling.

(2) Since it is necessary to connect the fan coil unit and the refrigerator in the room to be cooled by the pipe for circulating the heating / cooling medium, the construction cost and equipment cost are high. The same applies to an ammonia absorption refrigerator that uses ammonia water as the absorbing liquid and the refrigerant.

Therefore, the present inventors carry out a cooling cycle operation in which the condenser and the absorber are cooled by an air cooling method instead of a water cooling method, and the air to be cooled is directly passed through an evaporator instead of using a cooling / heating medium. A patent application has already been filed for the air conditioner (Japanese Patent Application No. 5-22351). FIG. 4 shows a main part of a modified example of an air conditioner using the single-effect absorption refrigerator proposed in the above application, and FIG. 5 shows an installed state of the air conditioner.

As shown in FIG. 5, the air conditioner includes an outdoor unit 1
The outdoor unit 1 is arranged outside the room 5 of the house to be air-conditioned with the configuration shown in FIG. 4, and the indoor unit 2 has only the outlet for cool air and the inlet for indoor air. It has and is arranged inside the chamber 5. The outdoor unit 1 and the indoor unit 2 are connected by a blower duct 3 for cold air and an intake duct 4 for indoor air. Reference numeral 6 denotes a remote controller for starting or stopping the operation of the apparatus, setting or canceling automatic operation, setting the room temperature, and adjusting the amount of cold air blown out.

The inside of the outdoor unit 1 has a structure as shown in FIG. 4, in which an aqueous lithium bromide solution is used as the absorbing liquid and water is used as the refrigerant.

The evaporator 10 has a function of evaporating the refrigerant under reduced pressure and cooling the air passing therethrough by the latent heat of evaporation thereof, and is connected to the blower duct 3 and the intake duct 4.
A blower fan 11 is provided in the intake duct 4.

The regenerator 12 has a function of generating a refrigerant vapor by absorbing the refrigerant and heating the diluted absorbent having a low concentration by the burner 13 and concentrating the concentration of the absorbent. Fuel gas is supplied to the burner 13 from a fuel supply pipe 14, and its combustion degree depends on the fuel supply control valve 15
Is adjusted by.

The condenser 16 has a function of cooling and liquefying the refrigerant vapor sent from the regenerator 12 by the air-cooling fan 17, and a part of the refrigerant is stored in the refrigerant tank 18 in order to adjust the concentration of the circulating solution. Store in.

The absorber 20 stores the absorbing liquid, has a function of absorbing the refrigerant evaporated in the evaporator 10 into the absorbing liquid, and is cooled by the same air cooling fan 17 as the condenser 16. The diluted absorption liquid that has absorbed the refrigerant and has a low concentration is temporarily stored in the diluted solution tank 21.

Reference numeral 22 denotes the regenerator 12 from the dilute solution tank 21.
The heat exchanger 23 for exchanging heat between the low-concentration rare-absorption liquid having a low concentration toward the absorber and the high-concentration high-concentration liquid having a high concentration toward the absorber 20 from the regenerator 12, 23 absorbs the refrigerant to reduce the concentration. The diluted absorbent that has become low is regenerated from the diluted solution tank 21 to the regenerator 12
The pump 24 is a pressure loss member such as a capillary provided between the downstream side of the evaporator 10 and the upstream side of the condenser 16.

V1, V2, V3, V4 and V5 are all valves such as solenoid valves, and in particular V4 is the dilute solution tank 21.
It is a valve having a non-return function that does not flow the refrigerant from the side to the side of the refrigerant tank 18.

The above air conditioner basically controls each container by controlling the temperature of each container except that the pump 23 is used to deliver the absorbing liquid from the dilute solution tank 21 to the regenerator 12. A pressure difference is created between them, and the refrigerant is sent out by the pressure difference and circulated.

[0018]

By the way, the condenser 16 of the above-mentioned air conditioner is provided with a large number of tubes having cooling fins formed at intervals of 2 mm on the outside thereof, through which a refrigerant vapor is passed. By blowing the air from the air cooling fan 17, the refrigerant vapor is cooled and liquefied. However, the air conditioner may be clogged due to dust and dust accumulated between the cooling fins, dirt may be attached to the cooling fins, and the cooling fins themselves may deteriorate during long-term use. is there. If this state is left as it is, the cooling capacity of the condenser 16 decreases, so that the outlet temperature of the condenser 16 cannot be lowered even if the rotation speed of the air cooling fan 17 is increased.

Since there is a general correlation between pressure and temperature, the outlet temperature of the condenser 16 is higher than the inlet temperature of the evaporator 10 in order to send the refrigerant from the condenser 16 to the evaporator 10 by the pressure difference. It is necessary to keep, that is, to keep the outlet temperature of the condenser 16 constant for the evaporator 10 having a preset pressure, but if the outlet temperature of the condenser 16 becomes too high than the set value. However, the pressure difference between the condenser 16 and the evaporator 10 becomes too large and a sharp pressure drop occurs at the inlet of the evaporator 10, which causes a problem that the refrigerant vaporizes and blows out (flashing).

The present invention has been made in view of the above points, and when the cooling fins of the condenser are deteriorated over time or are closed due to dirt and the cooling capacity of the condenser is lowered,
An object of the present invention is to provide an air conditioner that detects this and issues a warning to prompt the user for inspection and cleaning.

[0021]

In order to achieve the above object, the present invention stores an evaporator that evaporates a refrigerant, an absorption liquid that absorbs the refrigerant, and absorbs the refrigerant vapor evaporated in the evaporator into the absorption liquid. With an absorber, a regenerator that sends out a rare absorption liquid that has absorbed the refrigerant vapor by a pump and heats it to generate a refrigerant vapor and a concentrated absorption liquid, and a cooling fin with which the refrigerant vapor generated in the regenerator is condensed A condenser is provided, the condenser and the absorber are cooled by an air-cooling fan, the air in the room to be conditioned is directly cooled by evaporation of the refrigerant in the evaporator, and the cooled air is passed through a duct. In an air conditioner using an absorption refrigerator that blows air into a room for cooling, an outside air temperature detecting means for detecting an outside air temperature, an outlet temperature detecting means for detecting a condenser outlet temperature, and a condenser outlet temperature are a predetermined temperature. To hold in Rotation speed control means of the air cooling fan, rotation speed detection means of the air cooling fan, proper rotation of the air cooling fan predetermined to keep the outlet temperature of the condenser constant corresponding to the outside air temperature and the heating amount in the regenerator A first storage means for storing the number, a second storage means for storing the actual rotation speed of the air cooling fan, and an actual rotation speed calculated based on the proper rotation speed and the actual rotation speed of the air cooling fan. A third storage means for storing the fluctuation data in time series and a warning means for warning the clogging of the cooling fin when the fluctuation data of the rotational speed exceeds a certain value are provided.

[0022]

According to the present invention, the actual rotation speed of the air-cooling fan that keeps the condenser outlet temperature constant is detected every time the air conditioner is started, and at the same time, it corresponds to the outside air temperature and the heating amount in the regenerator at the time of starting. The proper rotation speed of the air-cooling fan stored in advance is read out, and the fluctuation data of the rotation speed calculated based on the proper rotation speed and the actual rotation speed is stored in time series, and the fluctuation data of this rotation speed is a constant value. When the temperature exceeds the limit, a warning is issued as if the cooling fins of the condenser have deteriorated or become blocked with age, and the user is prompted to perform inspection or cleaning.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 shows an essential part of an embodiment of an air conditioner using a single-effect absorption refrigerator according to the present invention. The installation state of the air conditioner according to the present invention is as shown in FIG.

Although the structure of the air conditioner according to the present invention is the same as that shown in FIG. 4, the description thereof will be omitted, but water is used as the refrigerant and lithium bromide is used as the absorbing liquid.

The operation of the electric circuit and the device necessary for controlling the air conditioner according to the present invention will be described below with reference to FIG.

T1 is a sensor for detecting the room temperature provided on the upstream side of the evaporator 10, T2 is a sensor for detecting the air temperature provided on the downstream side of the evaporator 10, and T3 is the liquid level detection of the regenerator. Sensor, T4 is a condenser temperature detecting sensor, T5 is an outside air temperature detecting sensor, T6 is a condenser outlet temperature detecting sensor, and 33 is a warning to the user that the cooling fins of the condenser are clogged. It is a warning lamp.

The air conditioner includes a controller 30 including a CPU, a memory, and a drive circuit, and a remote controller 6
The receiving unit 2a of the indoor unit 2 receives a setting signal from the indoor unit 2 and a communication controller 31 that receives a signal from the receiving unit 2a is provided. The controller 30 includes sensors T1 and T2.
The fuel supply control valve 1 for the blower fan 11, the air-cooling fan 17, the pump 23, and the fuel supply pipe 14 receives the signals from 2, T3, T4, T5, T6 and the signal from the communication controller 31.
5, the operation of the valves V1, V2, V3, V4, V5 and the lighting of the warning lamp 33 are controlled.

Next, the operation of the cooling cycle will be described with reference to FIG.

Before the start of operation, the valves V1, V3 and V5 are closed and the valve V2 is open. The regenerator 12 is empty.

When the operation button of the remote controller 6 is turned on, the valve V3 is opened (F-1), the motor M ₂ is driven, and the pump 23 sends the absorbing solution from the dilute solution tank 21 to the regenerator 12 (F- 2). The other valves remain as they are. At this time, the CPU of the controller 30 uses the sensor T3
It is determined whether the liquid level of the regenerator 12 has reached the specified level by observing the signal from (F-3). When the liquid level has reached the specified level, the fuel supply control valve 15 is opened to supply the fuel gas from the fuel supply pipe 14 to ignite the burner 13 (F-4). Refrigerant vapor is generated in the regenerator 12 and flows into the condenser 16, and the temperature of the condenser 16 gradually rises. The CPU of the controller 30 determines from the signal from the sensor T4 whether or not the temperature of the condenser 16 has reached a predetermined value (F-
5) When the predetermined value is reached, the valve V1 is opened and the valve V2 is closed (F-6), and the blower fan 11 and the air cooling fan 17 are rotated (F-7). As a result, in the condenser 16, the regenerator 12
The refrigerant vapor sent from is liquefied, and the liquefied refrigerant flows into the evaporator 10 due to the pressure difference between the condenser 16 and the evaporator 10, and in the evaporator 10, the refrigerant evaporates and takes the latent heat of vaporization, thereby blowing air. The fan 11 cools the air sent from the room through the intake duct 4. The cooled air is sent to the indoor unit 2 through the air duct 3 and the room 5
It is blown as cold air into the room 5 and the room 5 is cooled (F-
8).

In this cooling operation, the refrigerant evaporated in the evaporator 10 to become vapor flows into the absorber 20 and is absorbed therein by the absorbing liquid. The dilute absorption liquid, which has absorbed the refrigerant and becomes low in concentration, once enters the dilute solution tank 21 and then the pump 2
3 heat-exchanges with the concentrated high-temperature concentrated absorbent sent out from the regenerator 12 in the heat exchanger 22 through the valve V3,
It is sent to the regenerator 12. This state is the steady mode of operation. During this time, the valve V5 is repeatedly opened and closed.

Here, the temperatures and pressures of the container, the absorbing liquid, and the refrigerant in each part of the system during the cooling cycle operation are exemplified as follows.

Temperature (° C.) Pressure (Torr) Evaporator 10:10 to 20 10 to 20 Regenerator 12: 60 to 90 90 to 110 Condenser 16: 50 to 80 90 to 110 Absorber 20: 45 to 50 11 Refrigerant tank 18: 30 to 50 40 to 50 Dilute solution tank 21: 40 to 60 11 Heat exchanger 22: 30 to 90-Intake duct 4: 26 (room temperature) -Blower duct 3: 10-15- Dilute solution: 35 -40 Concentration: 61% Concentrated solution: 90 Concentration: 64.8% When the operation button of the remote controller 6 is turned off (F-
9), the blower fan 11 and the air-cooling fan 17 are stopped (F-10), while the refrigerant in the refrigerant tank 18 and the absorbing liquid in the regenerator 12 all flow into the dilute solution tank 21 during that time. This is to prevent the refrigerant tank 18 and the regenerator 12 from being corroded by the absorbing liquid while the apparatus is stopped. The pump 23 stops with a slight delay (F-1
1), the flow of all liquids in the entire system stops.

By the way, the above air conditioner basically controls each container by controlling the temperature of each container except that the pump 23 is used to deliver the absorbing liquid from the absorber 20 to the regenerator 12. A pressure difference is created between them, and the refrigerant is sent out and circulated by the pressure difference. Therefore, the delivery of the refrigerant from the condenser 16 to the evaporator 10 is also performed by the pressure difference, so that the outlet temperature of the condenser 16 is always constant with respect to the evaporator 10 having a preset pressure (in the present embodiment, the outlet temperature is constant). 45 ° C).

Here, the temperature of the condenser 16 depends on the change in the amount of refrigerant vapor generated due to the change in the amount of heating in the regenerator 12 and the change in the outside air temperature. For example, if the amount of generated refrigerant vapor increases or the outside air temperature rises, the condenser 16
Therefore, in order to keep the outlet temperature of the condenser 16 constant, the rotation speed of the air cooling fan 17 must be increased according to the temperature change. Therefore, the sensor T6 constantly detects the outlet temperature of the condenser 16, and the detected temperature is sent to the controller 30.
Controls the rotation speed of the motor M ₁ of the air cooling fan 17 so that the outlet temperature of the condenser 16 is maintained at 45 ° C.

However, when controlling the rotation of the air-cooling fan 17 based on the outlet temperature of the condenser 16 as described above, there are the following problems (1) and (2).

(1) Since the absorption chiller of the air conditioner according to the present invention is installed outdoors, the operating condition varies depending on the place where the air conditioner is installed, even if operating under the same conditions. come. In particular, the cooling capacity of the air-cooling fan is greatly affected by the air permeability of the cooling air in addition to being dependent on the outside air temperature. For example, if the outdoor unit is installed adjacent to the wall that surrounds the two sides, the air permeability is impaired. Therefore, the air cooling capacity may be significantly reduced as compared with the case where the air cooling is installed in a well-ventilated place. That is, even if the outside air temperature and the heating amount in the regenerator 12 are the same, depending on the installation location, the condenser 1
The proper number of rotations of the air-cooling fan for keeping the outlet temperature of 6 constant is not always the same. Therefore, in order to detect the case where the cooling capacity of the condenser has decreased even though the capacity of the air cooling fan has not deteriorated, the data of the proper rotation speed of the air cooling fan at the installation location is previously stored as comparison data in the memory 32. Must be kept.

(2) On the other hand, if the rotation speed of the air-cooling fan 17 is controlled simply based on only the outlet temperature of the condenser 16,
Depending on the installation condition of the outdoor unit, it is possible that the rotation speed will become abnormally high and this will have a major impact on the life and performance of the equipment.

Here, since the provisional value of the rotation speed of the air-cooling fan 17 for keeping the outlet temperature of the condenser 16 at 45 ° C. can be calculated from the outside air temperature and the heating amount in the regenerator 12, a certain outside air temperature is obtained. The allowable range of the rotation speed of the air-cooling fan 17 with respect to the combination of the heating amount in the regenerator 12 is stored in the memory 32 in advance as a temporary proper rotation speed, and if the operation of the air-cooling fan 17 exceeding this range is prevented in advance, Problem (2) can be solved.

Therefore, first, in the memory 32 provided in the controller 30, for each combination pattern x _n of the outside air temperature t _n and the heating amount k _m in the regenerator 12, the provisional proper rotational speeds n _nm are set in advance. Remember.

Next, a method of recording data of an appropriate number of revolutions corresponding to the above problem (1) will be described.

[0043] When pre-provisional adequate air conditioning device having stored the rotational speed is started for the first time after installation, to the combination x _ab heating amount k _b in the outside air temperature t _a and regenerator 12 detected by the sensor T5 at startup Te, detects the actual rotational speed n _ab air-cooling fan to keep the outlet temperature of the condenser 16 detected by the sensor T6 to 45 ° C., as a proper rotational speed instead of the provisional adequate rotational speed n _ab for x _ab Memory 3
Store in 2. In addition, the value of the proper rotation speed in all the patterns of other combinations is calculated from the numerical value obtained here, and is stored in the memory 32 as the proper rotation speed instead of the temporary proper rotation speed. As a result, the data of the proper rotation speed of the air-cooling fan 17 with respect to the outside air temperature at the time of startup and the heating amount in the regenerator 12 is accumulated in the memory 32. It should be noted that the actual rotation speed of the air-cooling fan 17 for maintaining the outlet temperature of the condenser 16 at 45 ° C. is detected every time the device is activated for a certain period (for example, 10 days) after installation of the air conditioner, and the plurality of values are calculated. If the proper rotation speed is obtained based on this, more accurate data of the proper rotation speed can be obtained.

Next, referring to FIG. 3, a warning operation when the cooling capacity of the condenser 16 is lowered will be described.

When the data storage period of the proper rotation speed is over, the air-cooling fan 1 is started every time the air conditioner is started thereafter.
7 is driven (P-1), the outlet temperature of the condenser 16 is detected by the sensor T6, and the controller 30 controls the rotation of the air cooling fan 17 so as to keep the outlet temperature of the condenser 16 at 45 ° C. (P-2). ). Further, the actual rotation speed of the air-cooling fan 17 for keeping the outlet temperature of the condenser 16 at 45 ° C. is detected and stored in the memory 32 (P-3). Further, the proper rotation speed stored in the memory 32 for the combination of the outside air temperature detected at the time of start-up and the heating amount in the regenerator 12 is read (P-4), the difference from the actual rotation speed is calculated, and the rotation speed is calculated from this difference. Is calculated, and this increase rate is stored in the memory 32 in time series as fluctuation data of the rotational speed (P-5). When the air-cooling capacity of the condenser 16 decreases due to clogging of the cooling fins of the condenser 16 as the period of use of the air conditioner becomes longer, the condenser 16 is not activated at startup.
The actual rotation speed of the air-cooling fan 17 for maintaining the outlet temperature of 45 ° C. is gradually higher than the stored proper rotation speed. The memory 32 stores a predetermined value for the rate of increase in the number of revolutions in advance. The rotational speed fluctuation data stored in the memory 32 during operation, that is, the increase rate of the rotational speed is compared with this predetermined value (P-6), and when it exceeds the predetermined value, the controller 30 turns on the warning lamp 33. Then, the user is warned that the cooling fins are clogged, and the condenser 16 is inspected and cleaned (P-7). In this case, the increase gradient of the increase rate of the rotation speed is obtained, and a method for warning when the increase gradient becomes a predetermined value or more, and an upper limit for the difference between the actual rotation speed and the proper rotation speed is set, A warning may be issued when the upper limit is exceeded. A buzzer or the like may be used instead of the warning lamp 33.

The warning in the method of controlling the rotation of the air-cooling fan based on the outlet temperature of the condenser 16 has been described in the above embodiment. Memorized air cooling fan 1
It is also possible to perform the initial operation at the temporary proper rotational speed of 7 and perform PID control until the cycle is formed, and rewrite the temporary proper rotational speed to the proper rotational speed.

[0047]

As described above, in the air conditioner according to the present invention, when the cooling fins of the condenser are deteriorated with time or are blocked due to dirt, the ability to cool the condenser is deteriorated. It detects from the fluctuation of the rotation speed of the air-cooling fan, and informs the user of the clogging of the cooling fins and issues a warning to prompt inspection and cleaning, so the refrigerant vaporizes and blows out at the evaporator inlet due to insufficient cooling in the condenser. It is possible to prevent the phenomenon (flushing) from occurring in advance, and it becomes possible to perform stable cooling operation of the air conditioner.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of an air conditioner according to the present invention.

FIG. 2 shows a flowchart of an operation operation of the air conditioner according to the present invention in a steady mode.

FIG. 3 is a flowchart showing a clogging warning operation of a cooling fin of a condenser of an air conditioner according to the present invention.

FIG. 4 is a block diagram of a modified example of the air conditioner proposed by the present applicant.

5 shows an installed state of the air conditioner shown in FIG.

[Explanation of symbols]

 1 Outdoor unit 2 Indoor unit 3 Blower duct 4 Intake duct 5 Room 6 Remote control device 10 Evaporator 11 Blower fan 12 Regenerator 13 Burner 14 Fuel supply pipe 15 Fuel supply control valve 16 Condenser 17 Air-cooling fan 18 Refrigerant tank 20 Absorber 21 Dilute solution tank 30 Controller 31 Communication controller 33 Warning lamp T1, T2, T3, T4, T5, T6 Sensor V1, V2, V3, V4, V5 valve

Claims (4)

[Claims] 1. An evaporator that evaporates a refrigerant, an absorber that stores an absorption liquid that absorbs the refrigerant and that absorbs the refrigerant vapor that has evaporated in the evaporator into an absorption liquid, and a rare absorption liquid that absorbs the refrigerant vapor by a pump. A regenerator that sends out and heats to generate a refrigerant vapor and a concentrated absorbent, and a condenser with a cooling fin that condenses the refrigerant vapor generated in the regenerator, and the condenser and the absorber Air conditioning using an absorption refrigerator that cools with an air-cooling fan, directly cools the air in the room to be air-conditioned by evaporation of the refrigerant in the evaporator, and blows the cooled air into the room through a duct for cooling. In the device, the outside air temperature detecting means for detecting the outside air temperature, the outlet temperature detecting means for detecting the condenser outlet temperature, the rotation speed control means of the air cooling fan for keeping the condenser outlet temperature at a predetermined temperature, and the air cooling fan Rotation of A detection unit, a first storage unit that stores an appropriate rotation speed of the air-cooling fan that is predetermined so as to keep the outlet temperature of the condenser constant corresponding to the outside air temperature and the heating amount in the regenerator; Second storage means for storing the actual rotation speed, and third storage means for storing the fluctuation data of the actual rotation speed calculated based on the proper rotation speed of the air-cooling fan and the actual rotation speed in time series. An air conditioner comprising: a warning unit that warns of clogging of the cooling fins of the condenser when the fluctuation data of the rotation speed exceeds a certain value. 2. The third storage means calculates an increase rate of the rotation speed from a difference between an appropriate rotation speed and an actual rotation speed of the air-cooling fan for keeping the outlet temperature of the condenser constant. The air conditioner according to claim 1, wherein the air-conditioning device is a storage device that stores the data serially, and the warning device is a warning device that warns when the increase rate becomes a predetermined value or more. 3. The third storage means is a storage means for chronologically storing the difference between the proper rotation speed and the actual rotation speed of the air-cooling fan for keeping the outlet temperature of the condenser constant. The air conditioner according to claim 1, wherein the warning unit is a warning unit that warns when the difference exceeds a predetermined value. 4. The first storage means replaces a provisional proper rotation speed preset for the outside air temperature and the heating amount in the regenerator with a proper rotation speed corresponding to an actual installation location of the air conditioner. The air conditioner according to claim 1, which is a storage unit for storing.