JP2002005548A - Household electrical appliance in which combustible refrigerant is used - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent danger such as outbreak of fire and explosion, when a refrigerant leaks from a household electrical appliance such as a refrigerator in which a combustible refrigerant is used. SOLUTION: This appliance has a refrigerating cycle including a compressor, etc., in which a combustible refrigerant is sealed, a current detector detecting the operation current of the refrigerating cycle, a control circuit controlling the operation of the compressor, and a detector of refrigerant leakage. The leakage detector detects a leakage of a combustible refrigerant having a leakage rate of at least a fixed value, which possibly causes a room explosion in which the household electrical appliance is installed by comparing a detected decrement in the operation current per hour with a reference value obtained from experiments, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a household electric appliance such as a refrigerator using a combustible refrigerant.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of protection of the ozone layer and prevention of global warming, a flammable HC system has been used as a refrigerant. When the flammable refrigerant leaks from the refrigerant circuit, the flammable refrigerant stays in the home appliance installation room, and may cause a danger such as fire or explosion. Hereinafter, a refrigerator will be described as an example of a home appliance.

[0003] It has been found through experiments and the like that explosion danger due to refrigerant leakage into the installation room greatly affects the refrigerant leakage speed. According to this, in the case of a gradual leak having a low leak rate, the gas concentration is reduced because diffusion with room air proceeds, and the gas does not fall within the explosion concentration range in the relationship between the volume of the installation room and the amount of refrigerant leak that is normally considered. However, if a large amount of flammable refrigerant, such as propane or butane, leaks in a short period of time exceeding a certain leak rate (hereinafter referred to as explosion hazardous leak rate), the refrigerant explodes near the indoor floor. If it stays in the concentration range and stays below the lower limit of explosion due to diffusion, the presence of an ignition source there will cause danger such as explosion.

[0004] The above description is shown in the experimental data of FIG. In the experiment, a refrigerator was set up in a laboratory simulating the refrigerator installation room,
The refrigerant was leaked from the refrigerator at a different leak rate, and the concentration was measured by a plurality of gas concentration measurement sensors installed so that the concentration could be accurately measured in the refrigerator installation room.

FIG. 8 shows the maximum concentration in the room as time elapses among the measured values of the gas concentration sensor in an experiment in which the refrigerant was leaked from the refrigerator while changing the leak rate. Usually, in the case of a refrigerant having a high specific gravity, the position near the floor has the highest gas concentration.

[0006] In the figure, the vertical axis represents the gas concentration, and the horizontal axis represents the time elapsed since the leak occurred. In the figure, 1 indicates the gas concentration at the lower limit of explosion, and explosion danger occurs above this line. 2 shows leak data having a leak rate when the maximum concentration point in the room becomes equal to the lower explosion limit. The amount of leaked refrigerant at this time is divided by the leak time indicated by T1 in the figure. The value obtained is the average explosion hazardous leak rate.

[0007] Reference numeral 3 denotes leak data when the leak speed is higher than the average explosion hazard leak speed (leak data 2). Further, reference numeral 4 denotes a leak speed which is lower than the average explosion hazard leak speed (leak data 2). This is leakage data for small cases. In the case of the leak data 3 having a high leak rate, the time during which the gas concentration is equal to or higher than the lower explosive limit of 1 (indicated by T2 in the figure) is the explosion risk time. In the case of the leak data 4 having a low leak rate, all of them are below the lower explosion limit and there is no danger of explosion.

As described above, whether or not the refrigerant leaking into the room reaches the concentration at which there is a danger of explosion depends on the leak speed. When the explosion concentration is reached, the explosion risk volume and the time are determined by the amount of the leaked refrigerant. And inversely proportional to the floor area or volume in the installation room.

On the other hand, one of the causes of leakage of the refrigerant is poor brazing at the time of manufacturing the connection portion in the refrigeration cycle. In this case, there is no danger of explosion due to leakage into the installation room.

[0010] Another cause of the leakage of the refrigerant is due to the occurrence of holes or stress cracks due to vibrations due to corrosion of the refrigeration cycle during use. This causes a sudden leak exceeding the explosion hazardous leak rate. And become dangerous.

[0011] Refrigerant leakage during use includes the operation of the compressor and the stop of the compressor. Since the leak rate of the refrigerant depends on the pressure at the leak location, the leak rate from the high-pressure side of the refrigeration cycle when the compressor is stopped is lower than that during the operation because the leak rate is lower. At the same time, even if it is stopped, if it is within a time period that causes a sudden leak with a risk of explosion, the ambient temperature around the cooler and the cooler in the refrigerator are low,
The saturation pressure becomes lower than the atmospheric pressure, and the refrigerant condenses into the cooler at the same time, so that the amount of refrigerant leaking into the room is reduced. Thus, the risk of explosion due to leakage of the refrigerant into the installation room while the compressor is stopped is at a level that causes no problem.

On the other hand, if the gas leaks from the high pressure side during operation, the pressure is high especially at the initial stage of the leak, so that the leakage speed is high, and the low pressure side refrigerant is supplied to the high pressure side by the compressor. Most of the refrigerant that has leaked will have the danger of explosion.

Further, the leakage of the refrigerant into the refrigerator will be described. If leakage occurs during manufacturing, the drain of the cooler is discharged to the outside of the refrigerator through a drain hole for discharging the drain to the outside of the refrigerator. The discharge speed varies depending on the position and shape of the drain hole, but if the period of installation from the production to the place of use is several days, any leakage will cause the concentration in the chamber to be below the lower explosion limit during any leakage. Conventional refrigerators have a discharge capacity that can be reduced.

[0014] Further, regarding the leak inside the refrigerator during use,
During operation, the refrigeration cycle provided in the refrigerator has a low pressure. For example, if isobutane is used as the refrigerant, the pressure will be negative during operation and the refrigerant will not leak. Further, during stoppage, the refrigeration cycle is separated from the high pressure side by a gate valve or the like, and refrigerant leakage can be prevented by maintaining a negative pressure. In addition, even if explosion danger occurs due to leakage of refrigerant, explosion and the like can be prevented by a conventional technique such as using explosion-proof electrical equipment if the refrigerant leaks.

As described above, the danger of explosion due to refrigerant leakage in a refrigerator using a flammable refrigerant depends on the actual use conditions and the estimated amount of refrigerant charged, and the like. It can be said that only a sudden refrigerant leak exceeding the speed is a target.

The conventional representative method for detecting the refrigerant leakage uses a gas concentration sensor. However, this method requires maintenance or the like in order to maintain long-term detection accuracy. However, it has disadvantages such as being expensive.

FIG. 9 is an electric circuit diagram showing a conventional refrigerant leak detection method. In FIG. 9, 5 is an AC power supply, 6 is a control circuit, 7 is a switch for a compressor, 8 is a compressor, and 9 is a current detector. The conventional electric circuit configured as described above is
Connected to the AC power supply 5, the control circuit 6 turns on the compressor switch 7 to operate the compressor 8, but the current detector 9 detects the compressor operating current and determines that the current is below the reference value. Then, it is determined that the refrigerant is leaking, and the compressor is abnormally stopped.

The control flow of the control circuit in this case is described, for example, in Japanese Patent Application Laid-Open No. 3-59371 in FIG.
Shown in In FIG. 10, an operation start command (step S
According to 1), if the number of abnormal stops is 3 or less (C <3) in step S2, the compressor is started (step S2).
3). After confirming the elapse of T time (usually 3 minutes) for checking the stability of the current (step S4), it is determined whether the operating current i is equal to or higher than the reference current I (step S5), and if YES, the steady operation is continued. (Step S6), if NO, the compressor is stopped (Step S7), and the number of stops is added (C =
C + 1) (Step S8), and after elapse of three minutes after the stop (Step S9), the process returns to Step S2 to restart the compressor. Stopping the compressor by the above control flow is 3
If it repeats twice, step S2 will be NO and it will stop abnormally (step S10).

[0019]

However, such a detection method is intended to prevent damage to a compressor or the like due to refrigerant leakage, and at least 12 minutes from the detection of refrigerant leakage until abnormal stop. However, there is a problem that it is not possible to take appropriate preventive measures against an urgent situation such as an explosion.

In order to prevent the danger of explosion or the like due to the leakage of these combustible refrigerants, the leakage of the refrigerant having a high leak rate which may cause an explosion, which has not been provided by the prior art, is carried out for a long period of time. It is necessary to obtain an inexpensive detection function for accurate detection and an explosion prevention means effective especially for leakage into a room.

[0021] The present invention has been made to solve such a problem, and when a refrigerant leaks from a home appliance such as a refrigerator using a flammable refrigerant, a danger of fire or explosion is avoided. Is to do.

[0022]

A home appliance using a flammable refrigerant according to the present invention comprises a compressor and the like, and includes a refrigeration cycle in which the flammable refrigerant is sealed, and a current detection for detecting an operation current of the refrigeration cycle. And a control circuit for controlling the operation of the compressor, and a control circuit for controlling the operation of the compressor. Refrigerant leakage detecting means for detecting the amount of decrease in the operating current per unit time by comparing the detected amount with a reference value obtained from an experiment or the like.

Further, when the refrigerant leakage detecting means detects the leakage of the flammable refrigerant having a leakage speed equal to or higher than a predetermined value, the compressor is stopped and the abnormality is notified.

Further, the stop time from the stop to the restart of the compressor is set to a predetermined time based on the indoor explosion risk time obtained from experiments and the like.

Further, the amount of decrease in the operating current per unit of time is detected by measuring the elapsed time with respect to the amount of constant operating current decrease.

Further, the current detector is provided in the compressor current circuit.

Further, the current detector is provided in all the current circuits of the home electric appliance.

Further, the apparatus is provided with an abnormality notifying device for notifying abnormalities by sound or light.

Further, it has a normal operation function and an emergency operation function with a larger air volume, has a machine room fan installed in a machine room of a household electric appliance in which a compressor or the like is installed, and has a refrigerant leakage detecting means of a certain level or more. When the leakage of the flammable refrigerant having the leakage speed is detected, the compressor is stopped and the emergency operation function of the machine room fan is operated.

Further, an outlet outlet provided in the outer part of the home electric appliance, a manual switch for turning on / off the power to the outlet, and a power switch provided in parallel with the manual switch to turn on / off the power to the outlet. When the refrigerant leakage detecting means detects the leakage of the flammable refrigerant having a leakage speed equal to or higher than a predetermined value, the compressor is stopped and the switch is operated.

In addition, an indoor outlet is connected to an outlet for outlet.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings. 1 to 3 show the first embodiment, FIG. 1 is an electric circuit diagram of a refrigerator,
FIG. 2 is a graph showing a time course of a compressor operating current in a refrigerant leakage test of a refrigerator using a combustible refrigerant, and FIG. 3 is a refrigerator control flowchart. In FIG. 1, reference numerals 5 to 9 are the same as those shown in the prior art. Reference numeral 10 denotes an abnormality notification device that has a function of notifying an abnormality by light or sound when a refrigerant leak is detected.

In FIG. 2, the vertical axis represents the operating current, and the horizontal axis represents the elapsed time after the start of the leak. In the figure, reference numeral 11 denotes a line indicating a lapse of the operating current. When refrigerant leakage starts from the high pressure side of the refrigeration cycle during compressor operation, the leakage continues until the high pressure becomes equal to the atmospheric pressure (T1 in the figure is the leakage time), and the amount of refrigerant charged in the refrigeration cycle decreases. , The operating pressure decreases with time, and the operating current decreases as the operating pressure decreases.

In the drawing, reference numeral 12 denotes a conventional reference value for judging refrigerant leakage, which is set to a value which does not cause erroneous judgment in consideration of the ambient temperature around the refrigerator during operation. In this refrigerant leakage speed, T3 in the figure is the first detection time, and according to the conventional control flow chart in FIG. 10 using JP-A-3-59371 as an example, the minimum detection time is 12 seconds before the abnormal stop. Minutes (T3 + 12 minutes from the start of the leak)
Is required.

Here, the amount of decrease in operating current per time (ΔT) by the timer function and the current detector 9 (Δi = ia−
ib), that is, by detecting Δi / ΔT and comparing it with the allowable value of Δi / ΔT of the refrigerant leak rate at which the danger of indoor explosion is found in advance through experiments or the like, significantly faster than the detection time by the conventional reference value, Refrigerant leakage can be reliably detected.

In FIG. 3, the number of times of abnormal stop is 2 in step S12 according to the operation start command (step S11).
If the abnormality notification is activated in the number of times (C <2) or less, the abnormality notification is canceled (step S13), and the compressor is started.
After confirming the elapse of T4 time (usually 3 minutes or less) for confirming the stability of the current (step S15), the current decrease amount Δi / ΔT per hour is equal to the reference value K obtained from the explosion hazardous leak speed.
It is determined whether the current is larger than the reference current I or not (Step S16). If YES, the steady operation is continued (Step S17). If NO, the compressor is stopped (Step S18). At the same time, abnormality notification is performed (step S19). Further, the number of stops is added (C = C + 1) (Step S20), and after elapse of the predetermined stop time T5 (Step S21), the process returns to Step S12 to restart the compressor. If the stop of the compressor according to the above control flow is repeated twice, step S12 becomes NO, abnormal stop (step S22), and automatic return cannot be performed.

The predetermined stop time T5 is set based on the possible explosion time under the worst conditions predicted from the amount of refrigerant charged in the refrigerator, the volume in the installation room, the refrigerant leakage speed, the stirring effect of the fan in the machine room, and the like. Value.

Normally, the operating current is always affected by the ambient temperature of the refrigerator at that time and the clogging of the pressure reducing device. Therefore, it is necessary to set the conventional reference value to a value small enough to prevent erroneous detection. Yes, it takes time to detect.

However, according to the refrigerant leakage detecting function of the present invention configured as described above, the conventional current detector is used as it is, and the timer function and the current detector 9 reduce the operating current per time (ΔT). Quantity (Δi = ia
−ib), that is, Δi / ΔT is detected, and Δi / ΔT of the refrigerant leak rate at which a danger of indoor explosion is determined in advance through experiments or the like.
By simply changing the detection method to be compared with the allowable value, it is possible to detect the refrigerant leak at a low cost and reliably, significantly earlier than the detection time by the conventional reference value.

In contrast to the conventional refrigerant leakage detection based on a sufficiently small value to prevent the above-mentioned detection, the refrigerant leakage detection function of the present invention always checks the amount of decrease in the operating current per unit time. The influence of the operating conditions such as the ambient temperature and the clogging of the pressure reducing device can be offset, and only the influence of the refrigerant leakage on the operating current can be confirmed, so that more accurate and faster detection can be performed.

Further, if the detection of Δi / ΔT is a method of measuring the elapsed time with respect to a constant operating current decrease amount, the more the explosion-risk refrigerant leaks at a high leak rate, the quicker the detection becomes. There is.

Further, by giving an alarm to the danger of explosion due to the abnormality notification operation at the first detection, it is possible to avoid the danger of explosion such as ventilation at an early stage or to evacuate, etc. Predetermined stop time T falling below the limit
By restarting the compressor after five, the danger of explosion due to operation can be avoided, and the operation can be stopped due to an erroneous detection.

In the above embodiment, the detector for the operating current is provided in the compressor current circuit. However, the same effect can be expected by installing the detector in the entire current circuit of the refrigerator including the compressor operating current. it can.

Embodiment 2 Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings. 4 and 5 show the second embodiment, FIG. 4 is an electric circuit diagram of the refrigerator, and FIG. 5 is a control flowchart of the refrigerator. 4, an AC power supply 5, a control circuit 6, a compressor switch 7, a compressor 8,
The current detector 9 is the same as the conventional refrigerator in FIG.
13 is a machine room fan, 14 is a contact of the normal operation switch of the machine room fan, 15 is a contact of the emergency operation switch configured in parallel with the contact of the normal operation switch 14 of the machine room fan, Both operate according to the command of the control circuit. Further, the machine room fan 13 is placed in a refrigerator machine room in which a compressor and the like are installed, and is set to operate with a larger air volume in an emergency operation than in a normal operation.

In FIG. 5, steps S11, S12,
S14 to S18 and S20 to S22 correspond to FIG.
Is the same as In the figure, step S24 is a switch to the emergency operation of the machine room fan 13, which is performed simultaneously with the stop of the compressor (step S18) after the detection of the leakage of the explosive danger refrigerant until step S16 shown in FIG. It is.

In step S23, the compressor is stopped (step S18) and the machine room fan emergency operation is switched (step S24), and a predetermined stop time T5 elapses (step S2).
1) The machine room fan 13 is switched to the normal operation in advance when the compressor is restarted (step S14).

In the present embodiment configured as described above,
Machine room fan 1
3 is operated in an emergency operation mode with a larger air volume than during normal operation, which promotes agitation of the atmosphere inside the refrigerator installation room and prevents the leakage refrigerant from reaching the explosion hazardous concentration, or lowers the explosion hazardous concentration in a short time. The danger of explosion can be greatly reduced by enabling the diffusion of blasts.

In addition, the stirring of the atmosphere in the room where the refrigerator is installed is promoted, and the predetermined stop time T until the restart after the abnormal stop of the compressor is started.
5 can be further reduced, so that a rise in the internal temperature when the compressor is stopped can be minimized.

Embodiment 3 Hereinafter, a third embodiment of the present invention will be described in detail with reference to the drawings. 6 and 7 show the third embodiment. FIG. 6 is an electric circuit diagram of the refrigerator, and FIG. 7 is a control flowchart of the refrigerator. 6, an AC power supply 5, a control circuit 6, a switch 7 for a compressor, a compressor 8,
The current detector 9 is the same as the conventional refrigerator in FIG.
Reference numeral 16 denotes an outlet outlet installed on the outer periphery of the refrigerator, 17 denotes a manual switch for turning on and off the power to the outlet outlet, and 18 denotes a manual switch 17 in parallel with the outlet circuit. This is a contact of a switch for turning on and off the current supply. This outlet circuit switch 18
Performs an on / off operation according to a command from the control circuit.

In FIG. 7, steps S11, S12,
S14 to S18 and S20 to S22 correspond to FIG.
Is the same as In step S26, the outlet circuit switch is turned ON, and is performed simultaneously with the stop of the compressor (step S18) after the detection of the refrigerant leakage with a risk of explosion up to step S16 shown in FIG. Step S2
Reference numeral 5 denotes an outlet switch, which turns off the outlet circuit switch 18 in advance when the compressor is restarted (step S14) after a predetermined stop time T5 has elapsed (step S21).

In the present embodiment configured as described above, the outlet socket 16 installed in the outer shell of the refrigerator is used.
In general, by connecting equipment that can ventilate the indoor atmosphere such as a ventilation fan placed in a refrigerator installation room such as a kitchen, a ventilation fan that is normally turned on and off with a manual switch installed in the outer part of the refrigerator, If a refrigerant leak with a danger of explosion is detected, the outlet circuit switch 18 is turned off.
By automatically operating the refrigerator, the atmosphere in the refrigerator installation room is ventilated, and the danger of explosion can be greatly reduced.

In the above-described embodiment, a refrigerator has been described as an example, but the same applies to home electric appliances such as an air conditioner and a dehumidifier using a combustible refrigerant.

[0053]

The home appliance using the flammable refrigerant according to the present invention can prevent the flammable refrigerant having a leak rate of a certain rate or more from leaking inside the home appliance installation room.
By detecting the detected amount of decrease in operating current per time by comparing it with a reference value obtained from experiments, etc.,
Refrigerant leak detection can be performed inexpensively and with high detection accuracy, and danger can be detected earlier.

Further, when the refrigerant leakage detecting means detects the leakage of the flammable refrigerant having a predetermined or more leakage speed, the compressor is stopped and the abnormality is notified, so that the danger can be quickly recognized and the danger of explosion or the like can be recognized. Actions to avoid can be taken.

Further, by setting the stop time from the stop of the compressor to restarting to a predetermined time based on the indoor explosion risk time obtained from experiments and the like, the danger of explosion due to restart can be avoided, and mistakes can be made. Trouble caused by detection can be avoided.

Further, the amount of decrease in the operating current per unit of time is detected by measuring the elapsed time with respect to the amount of decrease in the constant operating current. Becomes possible.

Further, by providing the current detector in the compressor current circuit, the current of the compressor can be directly detected.

Further, even if the current detector is provided in all the current circuits of the household electric appliance, the current of the compressor can be detected.

Further, the provision of the abnormality notification device for performing the abnormality notification by sound or light allows the danger to be quickly recognized,
Measures can be taken to avoid dangers such as explosions.

Further, it has a normal operation function and an emergency operation function with a larger air volume than the normal operation function, has a machine room fan installed in a machine room of a household electric appliance in which a compressor and the like are installed, and has a certain degree of refrigerant leakage detection means. If a leak of flammable refrigerant with a leak speed of is detected, the compressor is stopped and the emergency operation function of the machine room fan is activated to promote the diffusion of the indoor atmosphere and avoid explosions and other dangers more quickly. can do.

When the refrigerant leakage detecting means detects the leakage of the flammable refrigerant having a leakage speed higher than a predetermined value, the compressor is stopped and the switch for turning on / off the power supply to the outlet outlet is operated. Explosion and other dangers can be avoided more quickly.

In addition, by connecting the indoor ventilator to the outlet outlet, the indoor ventilator can be automatically operated, thereby ventilating the indoor atmosphere and avoiding the danger of explosion and the like more quickly. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram showing the first embodiment, and is an electric circuit diagram of a refrigerator.

FIG. 2 is a diagram illustrating the first embodiment, and is a diagram illustrating a lapse of time of a compressor operating current in a refrigerant leakage test of a refrigerator using a combustible refrigerant.

FIG. 3 shows the first embodiment, and is a control flowchart of the refrigerator.

FIG. 4 shows the second embodiment and is an electric circuit diagram of the refrigerator.

FIG. 5 shows the second embodiment and is a control flowchart of the refrigerator.

FIG. 6 shows the third embodiment and is an electric circuit diagram of the refrigerator.

FIG. 7 shows the third embodiment and is a control flowchart of the refrigerator.

FIG. 8 is a diagram showing, in an experiment in which a refrigerant was leaked from a refrigerator at a different leak rate, the indoor maximum concentration of the measured values of a gas concentration sensor over time.

FIG. 9 is an electric circuit diagram of a conventional refrigerator.

FIG. 10 is a control flowchart of a conventional refrigerator.

[Explanation of symbols]

5 AC power supply, 6 control circuit, 8 compressor, 9 current detector, 10 abnormality notification device, 13 machine room fan, 14
Machine room fan normal operation switch, 15 Machine room fan emergency operation switch, 16 outlet outlet, 17 outlet circuit manual switch, 18 outlet circuit switch.

Claims (10)

[Claims] 1. A refrigeration cycle including a compressor and the like, in which a flammable refrigerant is filled, a current detector for detecting an operation current of the refrigeration cycle, a control circuit for controlling the operation of the compressor, Detected the leakage of flammable refrigerant with a leak rate of more than a certain level, which could cause an explosion or other danger in the home appliance installation room, provided in the circuit. And a refrigerant leak detecting means for detecting by comparing the measured value with a reference value. 2. The compressor according to claim 1, wherein when the refrigerant leakage detecting means detects a leakage of a flammable refrigerant having a leakage speed equal to or higher than a predetermined value, the compressor is stopped and an abnormality is notified.
Home appliances using the flammable refrigerant as described. 3. The flammable refrigerant according to claim 2, wherein a stop time from a stop of the compressor to a restart thereof is a predetermined time based on an indoor explosion risk time obtained from an experiment or the like. Use home appliances. 4. A method for detecting the amount of decrease in operating current per unit time,
The home appliance using a flammable refrigerant according to claim 1, wherein the measurement is performed by measuring an elapsed time with respect to a constant operation current decrease amount. 5. The home appliance according to claim 1, wherein the current detector is provided in a compressor current circuit. 6. The home appliance using a flammable refrigerant according to claim 1, wherein the current detector is provided in all current circuits of the home appliance. 7. The home appliance using a flammable refrigerant according to claim 2, further comprising an abnormality notification device for performing an abnormality notification by sound or light. 8. A machine room fan which has a normal operation function and an emergency operation function having a larger air volume than the normal operation function, is provided in a machine room of a home electric appliance in which a compressor or the like is installed, and the refrigerant leakage detecting means is constant. The home appliance using a flammable refrigerant according to claim 1, wherein when the leakage of the flammable refrigerant having the above-described leakage speed is detected, the compressor is stopped and an emergency operation function of the machine room fan is operated. machine. 9. An outlet outlet provided in an outer part of the household electric appliance, a manual switch for turning on / off the power to the outlet, and a power switch provided in parallel with the manual switch to supply power to the outlet. A switch for turning on and off, wherein when the refrigerant leak detecting means detects a leak of a flammable refrigerant having a leak speed of a predetermined value or more, the compressor is stopped and the switch is operated. An electric home appliance using the flammable refrigerant according to claim 1. 10. The household electrical appliance using a flammable refrigerant according to claim 9, wherein an indoor ventilation device is connected to the outlet outlet.