JP3698036B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a capability value in rated operation of cooling and heating of an air conditioner.
[0002]
[Prior art]
In the domestic air conditioner (room air conditioner) market, a direct blow type (non-duct connection type) with a rated cooling capacity of 5.0 kW or less is a wall-mounted type, and one indoor unit is installed in one outdoor unit. The air conditioner of the system to be installed (those that are not multi systems) is the mainstream, accounting for over 90% of the market. Further, more than 80% of home air conditioners are used for both cooling and heating, and the mainstream is inverter-driven air conditioners that can change the rotation speed of the compressor in the refrigeration cycle.
[0003]
Global warming suppression As an environmental issue, as room air conditioners have become more energy efficient, in recent years, room air conditioners have become larger in size, such as heat exchangers, and air conditioners have become larger and heavier.
Further, in the Home Appliance Recycling Law enforced in 2001, room air conditioners for home use are subject items, and promotion of recycling is a major issue for manufacturers. In other words, it is necessary to reduce the size and weight of room air conditioners for the purpose of collecting waste and promoting recycling. However, the increase in size and weight of air conditioners through the promotion of energy conservation has been a hindrance. Therefore, the downsizing of the compressor, which accounts for the total weight of the room air conditioner, is becoming a social initiative.
In addition, the air conditioner of the type in which one indoor unit is provided for one outdoor unit in the form of a direct blow type and wall mounted, which is the mainstream in the market, is one of the air conditioners that are subject to the Home Appliance Recycling Law. In addition to the mainstream form, the energy conservation law regulation value is also set to an extremely high regulation value compared to other form categories. Furthermore, the said form has set the heating rated capacity which tends to be insufficient in capacity so that it can respond also to the house of various heat insulation structures compared with the cooling rated capacity until now.
[0004]
Up to now, the current room air conditioner has the ratio between the rated heating capacity and the rated cooling capacity (heating rated capacity / cooling rated capacity) in the rated cooling capacity and the rated heating capacity that allow the equipment to operate continuously under the air conditions defined in JISC9612. The values shown in FIG. 10 are set to 1.35 to 1.64. At this time, when comparing the compression work and the compression load torque related to the reliability of the bearings of the compressor during cooling and heating rated capacity operation, the heating operation is higher, and the reliability of the compressor can withstand the heating operation It was necessary to provide.
[0005]
The compression work and compression load torque of the compressor are important items in designing the reliability of the compressor.
The compression work W performed by the compressor is
W = Ps * Vp * N / (N-1) * {(Pd / Ps) ^ ((N-1) / N) -1}
Where Ps: compressor suction pressure (low pressure),
Pd: compressor discharge pressure (high pressure),
Vp: displacement,
N: Shown in specific heat ratio.
The torque T applied during compression is
T = W / rpm
Here, rpm is indicated by the number of rotations of the compressor.
Among these, the Pd (high pressure) pressure has a high influence on the compression work and load torque, and the reliability of the compressor cannot be increased unless the operating frequency of the compressor is lowered, that is, the capacity is not lowered.
[0006]
FIG. 11 is a Mollier diagram in room air conditioner operation, in which the vertical axis represents pressure and the horizontal axis represents enthalpy. The solid line shows the case of driving with high capacity, and the dotted line shows the case of driving with low capacity. When the operation is performed with high capacity, the high pressure (Pd) is increased.
As shown in FIG. 10, the conventional room air conditioner has a higher capacity in the heating operation than in the cooling operation. Therefore, the conventional room air conditioner is calculated based on the compression work W expression and the load torque T expression. It can be seen that the compression work and the load torque during the operation are higher than those during the cooling operation (described again in FIGS. 4 and 5 described later). That is, it is necessary to provide a compressor such as a compressor and a bearing that can withstand the heating capacity, and the compressor cannot be miniaturized.
[0007]
Further, as countermeasures for ozone layer destruction suppression, which is an environmental problem, R410A, which is an HFC refrigerant not containing chlorine, is being replaced as an alternative to R22, which is an HCFC refrigerant containing chlorine, which has been used so far. However, this alternative refrigerant is a high-pressure refrigerant, and has a feature that the pressure rises about 1.6 times that of the R22 refrigerant used so far. For this reason, the gas refrigerant sucked into the compressor is increased in density to increase the axial load and the like, and it is necessary to further improve the reliability of the compressor, and there is a problem that the compressor cannot be reduced in size.
[0008]
[Problems to be solved by the invention]
In recent years, room air conditioners have become larger and heavier due to the suppression of global warming and the destruction of the ozone layer, which contradicts this and hinders the promotion of recycling.
For this reason, the miniaturization of compressors and the promotion of energy saving are social efforts.
However, the use of high-pressure refrigerant as an alternative refrigerant in recent years has increased the axial load of the compressor, and it is necessary to improve the reliability of the compressor. However, the reliability of the compressor is stricter and there is a problem that it is difficult to reduce the size of the compressor.
[0009]
The present invention has been made to solve the above-described problems, and by reducing the size of an air conditioner capable of cooling and heating, it is possible to reduce raw materials, transport products, store, install, discard, and save energy when using an air conditioner. The purpose is to improve the life cycle assessment leading to.
[0010]
[Means for Solving the Problems]
An air conditioner according to claim 1 of the present invention is configured by connecting an inverter-driven compressor, a four-way valve, a condensing side heat exchanger, a decompression device, and an evaporation side heat exchanger that can control the rotational speed of the compressor. One unit is used in the form of a direct-blowing wall type that uses a refrigerant having a saturation temperature at a condensation temperature of 50 ° C. and a saturation pressure of 2500 kPa or more and can be operated in a cooling cycle and a heating cycle by switching a four-way valve. In the air conditioner with one indoor unit in the outdoor unit, the heating rated capacity is larger than the cooling rated capacity and 1.3 times or less so that the compression work of the compressor is almost the same during heating operation and cooling operation Is set.
In the air conditioner according to claim 2 of the present invention, the rated cooling capacity is an air condition of an indoor dry bulb temperature of 27 ° C., an indoor wet bulb temperature of 19 ° C., an outdoor dry bulb temperature of 35 ° C., and an outdoor wet bulb temperature of 24 ° C. The rated heating capacity guarantees continuous operation under air conditions of an indoor dry bulb temperature of 20 ° C, an outdoor dry bulb temperature of 7 ° C, and an outdoor wet bulb temperature of 6 ° C.
[0011]
In the air conditioner according to claim 3 of the present invention, the cooling rated capacity is set to 5.0 kW or less.
[0012]
An air conditioner according to a fourth aspect of the present invention is configured by connecting an inverter-driven compressor, a four-way valve, a condensing side heat exchanger, a pressure reducing device, and an evaporation side heat exchanger that can control the rotational speed of the compressor. In the air conditioner that uses a refrigerant having a saturation temperature at a condensation temperature of 50 ° C. and a saturation pressure of 2500 kPa or more, and can perform a cooling cycle and a heating cycle operation by switching a four-way valve, the heating rated capacity is the cooling rating. It is set to 1.0 times or more and 1.3 times or less of the capacity, and at least one of the maximum rotation speed and the maximum operating current of the compressor can be increased for a predetermined time.
The air conditioner according to claim 5 of the present invention is capable of increasing the maximum rotational speed or the maximum operating current of the compressor for a predetermined time by an external operation.
[0013]
An air conditioner according to a sixth aspect of the present invention includes a calculation means for calculating the difference between the room temperature and the set temperature, or an outside air temperature detection means for detecting the outside air temperature, and the signal from the calculation means exceeds a predetermined value. The maximum rotational speed or the maximum operating current of the compressor can be increased for a predetermined time by either the case where the signal is detected or the signal from the outside air temperature detection means becomes a predetermined value or less.
[0014]
The air conditioner according to claim 7 of the present invention is provided with a container temperature detecting means for detecting the container temperature of the compressor, and at least an increase in the maximum rotational speed of the compressor or a maximum operation according to a detection signal from the container temperature detecting means. Either increase in current is possible.
[0015]
The air conditioner according to claim 8 of the present invention is provided with an operating current detection means for detecting the operating current of the compressor, and at least the increase in the maximum operating current of the compressor or the compressor according to the detection signal from the operating current detection means. Either one of the maximum rotation speeds can be increased.
[0016]
The air conditioner according to claim 9 of the present invention is such that at least one of the indoor fan rotation speed and the outdoor fan rotation speed is increased by an external operation.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a refrigerant circuit diagram and a control circuit diagram showing an air conditioner according to the present invention, FIG. 2 is a refrigerant circuit diagram showing a refrigerant flow direction during cooling operation, and FIG. 3 is a refrigerant flow direction during heating operation. FIG. 4 is a characteristic diagram showing the compression work of the compressor of the air conditioner, FIG. 5 is a characteristic diagram showing the load torque of the compressor of the air conditioner, and FIG. 6 is an explanatory diagram of the air conditioning load of the house. 7 is a diagram showing the relationship between the capacity of the air conditioner and the amount of power consumption, and FIG. 8 is an explanatory diagram showing the heating rated capacity value of the air conditioner.
[0018]
In FIG. 1, an electric compressor 1, a refrigerant flow switching valve 5 (hereinafter referred to as a four-way valve), an outdoor heat exchanger 8, a pressure reducer 7, and an indoor heat exchanger 6 are provided, and a refrigerant compression cycle is provided. The air conditioner provided with the fans 9 and 10 in the outdoor heat exchanger 8 and the indoor heat exchanger 6 is an inverter control system that controls the frequency and voltage of the power supply to the electric compressor 1. This is because the indoor-side microcomputer controller 12 detects the building air conditioning load by calculating the difference between the room temperature and the set temperature from the room temperature 18 and the room temperature set value, and the operating rotational speed of the outdoor compressor is determined according to the load. Calculate and send information to the outdoor microcomputer control unit 14. The outdoor microcomputer control unit 14 is a refrigeration cycle apparatus that automatically controls the rotational speed of the compressor based on information from the indoor microcomputer control unit 12.
[0019]
Further, the outdoor microcomputer control unit 14 receives a cooling operation or heating operation command from the indoor microcomputer control unit 12, and during the cooling operation, the outdoor heat exchanger 8 is used as a condenser as shown in FIG. The four-way valve 5 that controls the flow of the refrigerant is controlled so that 6 is used as an evaporator. On the other hand, during the heating operation, the four-way valve 5 is controlled so that the refrigerant flows through the indoor heat exchanger 6 as a condenser and the outdoor heat exchanger 8 as an evaporator as shown in FIG.
[0020]
Further, R410A, which is an HFC refrigerant, is used as the refrigerant, and is a high-pressure refrigerant as compared with the conventional R22, so that the gas density of the low-pressure gas refrigerant sucked into the compressor is increased.
[0021]
This air conditioner is continuously operated under the air conditions defined in JISC9612, which are an indoor dry bulb temperature of 27 ° C., an indoor wet bulb temperature of 19 ° C., an outdoor dry bulb temperature of 35 ° C., and an outdoor wet bulb temperature of 24 ° C. The rated cooling capacity that guarantees 2.8 kW, for example, is the rated heating capacity that guarantees continuous operation under air temperature conditions of 20 ° C, 20 ° C, and 7 ° C. For example, it is set to 3.2 kW.
[0022]
4 and 5 show the relationship between the compression work W of the compressor and the compression load torque T when the cooling and heating rated capacities are operated.
As shown in this figure, the compression load torque and compression work applied to the compressor during the cooling rated operation are substantially the same as the compression load torque and compression work applied during the heating operation.
That is, since the load and work applied to the compressor related to the reliability of the compressor are almost the same during the cooling operation and the heating operation, a mechanism that can withstand the heating operation with a high load applied to the compressor as in the prior art. There is no need for special setting, the bearing mechanism of the compressor can be simplified, and the compressor can be miniaturized.
[0023]
According to the present invention, since the capacity is set about 20% lower than the conventional heating rated capacity value, the heating capacity is reduced accordingly.
FIG. 6 shows the relationship between the cooling building load and the heating building load in the conventional residential building structure and the recent building load. As is clear from this figure, recent buildings have increased heat insulation from the outside air, and the building load of heating has been significantly reduced. The building load during cooling is also reduced, but during cooling operation it is greatly influenced by the latent heat load in addition to the sensible heat load, so the contribution is smaller than the heating. Therefore, if it is about the rate of decrease in the rated heating capacity shown in the present invention, it is unlikely that the actual capacity will be insufficient.
[0024]
Further, FIG. 7 shows the relationship between heating capacity and power consumption.
The power consumption in the heating rated capacity can be reduced by about 20% or more than the power consumption in the conventional heating rated capacity. By refraining from driving at high capacity with low driving efficiency in this way, energy saving can be achieved, and the peak of the driving current can be suppressed, and there is an effect of suppressing breaker jumping in the home.
As mentioned above, although the air conditioning apparatus with a cooling rated capacity of 2.8 kW has been described as an example, the same effect can be obtained in other capacity bands, and FIG. 8 shows examples of heating rated capacity values in other cooling rated capacity bands. Show.
[0025]
Embodiment 2. FIG.
FIG. 9 shows a second embodiment of the present invention and is an explanatory diagram of a wireless remote controller as an external operation unit. In the figure, 31 is a wireless remote control main body, 32 is a transmission unit that transmits an operation command signal to the air conditioner main body, 33 is a display unit that displays an operation state with liquid crystal, and 35 is a “heating power adjustment” in the operation switch 34. Button. Since the air conditioner main body is the same as that of the first embodiment, the description thereof is omitted.
[0026]
Next, the operation will be described. The “heating power adjustment” button 35 can be used to switch between “standard” operation and “strong” operation. In normal operation, “standard” is selected, but when using the heating operation, the room window is opened to temporarily When you want to temporarily increase the heating capacity, such as when the building air-conditioning load increases or when the operation of a house with extremely low heat insulation of the building structure is started, operate the "Heating power adjustment" button 35 to set to "Strong" operation To do.
[0027]
When this operation is performed, an operation is performed in which the heating capacity is increased only for a limited time, compared to when the system is used in the “standard” operation. That is, the maximum operating current capable of operating at the maximum capacity is improved, and the operating frequency of the compressor is set higher. Therefore, a higher heating capacity can be exhibited and the comfort can be improved. Although the load torque and compression work applied to the compressor at this time are higher than the “standard” setting, the operation is performed only within a limited time, and thus the reliability of the compressor is not impaired.
[0028]
In addition, in the above description, the operation can be switched by operating the “heating power adjustment” button. However, when the difference between the set temperature and the room temperature is more than a predetermined value, the compression when set to “standard” within a limited time is possible. The same effect can be obtained by changing the maximum rotation speed or maximum current value of the machine to allow the operation to increase the heating capacity.
[0029]
Or, when it is determined that the outside air is low and the capacity is to be increased according to the detection signal from the outside air temperature detection device, the maximum rotation speed or maximum operation of the compressor when set to “Standard” within a limited time. The operation may be changed to be higher than the current, and the operation for increasing the heating operation may be permitted, and the same effect can be obtained.
[0030]
In addition, when the compressor temperature is low or the operating current is low, depending on the detection signal from the compressor container temperature or operating current, and it is determined that there is no problem even if the heating capacity is increased. In addition, an operation that increases the heating capacity may be permitted as compared with the case of setting to “standard” within a limited time, and the same effect can be obtained.
[0031]
The above describes the operation that allows the heating capacity to be demonstrated only for a limited time when set to “strong” operation with the “heating power adjustment” button, but the maximum current when set to “strong” operation. To increase the operating frequency of the compressor, set the rotational speed of the indoor fan higher, reduce the condensation pressure to reduce the load torque and compression work applied to the compressor, and The fan speed is also set higher than “Standard”, and the evaporation pressure is increased to reduce the operating frequency of the compressor, thereby reducing the load torque and compression work applied to the compressor and increasing the heating capacity for a long time. Driving may be enabled. However, at this time, the fan rotation speed increases indoors or outdoors, so that the operating noise increases.
[0032]
【The invention's effect】
An air conditioner according to claim 1 of the present invention is configured by connecting an inverter-driven compressor, a four-way valve, a condensing side heat exchanger, a decompression device, and an evaporation side heat exchanger that can control the rotational speed of the compressor. One unit is used in the form of a direct-blowing wall type that uses a refrigerant having a saturation temperature at a condensation temperature of 50 ° C. and a saturation pressure of 2500 kPa or more and can be operated in a cooling cycle and a heating cycle by switching a four-way valve. In the air conditioner with one indoor unit in the outdoor unit, the heating rated capacity is larger than the cooling rated capacity and 1.3 times or less so that the compression work of the compressor is almost the same during heating operation and cooling operation Therefore, the load torque and compression work of the compressor applied during the cooling and heating rated capacity operation are almost the same, and the compressor can be reduced in size and weight.
In the air conditioner according to claim 2 of the present invention, the rated cooling capacity is an air condition of an indoor dry bulb temperature of 27 ° C., an indoor wet bulb temperature of 19 ° C., an outdoor dry bulb temperature of 35 ° C., and an outdoor wet bulb temperature of 24 ° C. Moreover, since the heating rated capacity guarantees continuous operation under air conditions of an indoor dry bulb temperature of 20 ° C., an outdoor dry bulb temperature of 7 ° C., and an outdoor wet bulb temperature of 6 ° C., it has an effect of maintaining comfortable air conditioning.
[0033]
Since the air conditioning apparatus according to claim 3 of the present invention has the cooling rated capacity set to 5.0 kW or less, the heating rated capacity value is set lower than the conventional one, and the power consumption at the time of starting the air conditioning apparatus is reduced. Since it can be driven low, energy saving and low power peak operation can be achieved, so that it is possible to prevent breaker jumps due to overcurrent capacity in the home.
[0034]
An air conditioner according to a fourth aspect of the present invention is configured by connecting an inverter-driven compressor, a four-way valve, a condensing side heat exchanger, a pressure reducing device, and an evaporation side heat exchanger that can control the rotational speed of the compressor. In the air conditioner that uses a refrigerant having a saturation temperature at a condensation temperature of 50 ° C. and a saturation pressure of 2500 kPa or more, and can perform a cooling cycle and a heating cycle operation by switching a four-way valve, the heating rated capacity is the cooling rating. It is set to 1.0 times or more and 1.3 times or less of the capacity, and at least one of the maximum rotation speed and the maximum operation current of the compressor can be increased for a predetermined time. The applied load torque and compression work of the compressor to be applied are substantially the same, so that the compressor can be reduced in size and weight, and the comfort can be maintained even when the air conditioning load is suddenly increased.
In the air conditioner according to claim 5 of the present invention, the maximum rotational speed or the maximum operating current of the compressor can be increased for a predetermined time by an external operation, so the user of the air conditioner wants to temporarily increase the capability. It can be set occasionally and has the effect of improving comfort.
[0035]
An air conditioner according to a sixth aspect of the present invention includes a calculation means for calculating the difference between the room temperature and the set temperature, or an outside air temperature detection means for detecting the outside air temperature, and the signal from the calculation means exceeds a predetermined value. The maximum rotation speed or maximum operating current of the compressor can be increased for a predetermined period of time, either when the signal from the outside air temperature detection means falls below a predetermined value. It has the effect of maintaining comfort.
[0036]
The air conditioner according to claim 7 of the present invention is provided with a container temperature detecting means for detecting the container temperature of the compressor, and at least an increase in the maximum rotational speed of the compressor or a maximum operation according to a detection signal from the container temperature detecting means. Since either one of the current increases is possible, there is an effect that can automatically cope with a change in the air conditioning load.
[0037]
The air conditioner according to claim 8 of the present invention is provided with an operating current detection means for detecting the operating current of the compressor, and at least the increase in the maximum operating current of the compressor or the compressor according to the detection signal from the operating current detection means. Since either one of the maximum rotation speeds can be increased, it is possible to automatically cope with changes in the air conditioning load.
[0038]
In the air conditioner according to claim 9 of the present invention, at least one of the indoor fan rotation speed and the outdoor fan rotation speed is increased by an external operation, so that it is possible to perform an operation for increasing the heating capacity for a long time, and more comfortably. The effect which can aim at the improvement of property is produced.
[Brief description of the drawings]
FIG. 1 is a refrigerant circuit diagram and a control circuit diagram of an air-conditioning apparatus according to Embodiment 1 of the present invention.
FIG. 2 is a refrigerant circuit diagram during cooling operation of the air-conditioning apparatus according to Embodiment 1 of the present invention.
FIG. 3 is a refrigerant circuit diagram during heating operation of the air-conditioning apparatus according to Embodiment 1 of the present invention.
FIG. 4 is a characteristic diagram showing compression work of the compressor of the air-conditioning apparatus according to Embodiment 1 of the present invention.
FIG. 5 is a characteristic diagram showing load torque of the compressor of the air-conditioning apparatus according to Embodiment 1 of the present invention.
FIG. 6 is an explanatory diagram of the air conditioning load of the house according to the first embodiment of the present invention.
FIG. 7 is a relationship diagram between the capacity of the air-conditioning apparatus according to Embodiment 1 of the present invention and power consumption.
FIG. 8 is an explanatory diagram showing a heating rated capacity value of the air-conditioning apparatus according to Embodiment 1 of the present invention.
FIG. 9 is a configuration diagram of a wireless remote controller of an air-conditioning apparatus according to Embodiment 2 of the present invention.
FIG. 10 is an explanatory diagram of a heating rated capacity value of a conventional air conditioner.
FIG. 11 is a Mollier diagram of a conventional air conditioner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Electric compressor, 2 discharge piping, 3 suction | inhalation piping, 4 accumulator, 5 way valve, 6 indoor side heat exchanger, 7a decompression device (capillary tube), 7b decompression device (electronic control type expansion valve), 7c decompression device (capillary tube) ), 8 outdoor heat exchanger, 9 indoor fan, 10 outdoor fan, 11a indoor / outdoor connection pipe (liquid pipe), 11b indoor / outdoor connection pipe (gas pipe), 12 indoor microcomputer control unit, 13 indoor fan drive device, 14 outdoor Microcomputer control unit, 15 compressor drive device, 16 outdoor fan drive device, 17 compressor temperature thermistor, 18 room temperature detection thermistor, 19 defrost detection thermistor, 20 indoor tube temperature thermistor, 21 outdoor temperature thermistor, 31 wireless remote control body, 32 Transmitter, 33 Display, 34 Operation switch, 35 Heating power adjustment button.

Claims (9)

Composed of an inverter-driven compressor that can control the rotation speed of the compressor, a four-way valve, a condensation side heat exchanger, a pressure reducing device, and an evaporation side heat exchanger, and a saturation pressure at a condensation temperature of 50 ° C. is 2500 kPa or more. Air that provides one indoor unit in one outdoor unit in the form of a direct-blow wall-mounted type that uses a refrigerant having a saturation temperature to be able to perform a cooling cycle and a heating cycle operation by switching the four-way valve. in conditioner, air conditioner, characterized in that warm Boteikaku ability to compression work becomes about the same as when during the cooling operation heating operation of the compressor is set below 1.3 times greater than the cooling rated capacity apparatus. The rated cooling capacity is an indoor dry bulb temperature of 27 ° C., an indoor wet bulb temperature of 19 ° C., an outdoor dry bulb temperature of 35 ° C., and an outdoor wet bulb temperature of 24 ° C., and the heating rated capacity is an indoor dry bulb temperature of 20 ° C. The air conditioner according to claim 1, wherein continuous operation is guaranteed under air conditions of an outdoor dry bulb temperature of 7 ° C and an outdoor wet bulb temperature of 6 ° C. The air conditioning apparatus according to claim 1 or 2 , wherein the cooling rated capacity is set to 5.0 kW or less. Composed of an inverter-driven compressor that can control the rotation speed of the compressor, a four-way valve, a condensation side heat exchanger, a pressure reducing device, and an evaporation side heat exchanger, and a saturation pressure at a condensation temperature of 50 ° C. is 2500 kPa or more. In the air conditioner capable of operating the cooling cycle and the heating cycle by switching the four-way valve, the heating rated capacity is 1.0 times or more and 1.3 times the cooling rated capacity. An air conditioner set as described below, wherein at least one of the maximum rotation speed and the maximum operating current of the compressor can be increased for a predetermined time. The air conditioner according to claim 4, wherein the maximum rotation speed or the maximum operating current of the compressor can be increased for a predetermined time by an external operation. Computation means for calculating the difference between the room temperature and the set temperature, or outside air temperature detection means for detecting the outside air temperature. When the signal from the computation means exceeds a predetermined value, or the signal from the outside air temperature detection means There by either if equal to or less than a predetermined value, the air conditioning apparatus according to claim 4, wherein the maximum rotational speed or maximum operating current of the compressor is characterized in that to enable increased by a predetermined time. A container temperature detecting means for detecting the container temperature of the compressor is provided, and at least one of an increase in the maximum rotation speed of the compressor or an increase in the maximum operating current is enabled according to a detection signal from the container temperature detecting means. The air conditioning apparatus according to claim 4 . An operating current detecting means for detecting the operating current of the compressor is provided, and at least one of an increase in the maximum operating current of the compressor or an increase in the maximum rotational speed of the compressor is possible according to a detection signal from the operating current detecting means. The air conditioner according to claim 4, wherein The air conditioner according to any one of claims 4 to 8 , wherein at least one of the indoor fan rotation speed and the outdoor fan rotation speed is increased by an external operation.

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