JPH04125016A - Method of preventing electric fire hazard in living room - Google Patents

Abstract

PURPOSE:To prevent the occurrence of electric fire hazard by installing an overcurrent monitor separately, which has the function of comparing the magnitudes of the current value in use with a set value, the alarm transmitting function, and the function of automatically recovering from alarm condition, near the doorway of each living room of an apartment-house. CONSTITUTION:If load increases and exceeds a set value of an overcurrent monitor 5, an alarm lamp 7 lights and also it is output to a central monitor circuit 6 through a closed contact. The person in charge of management of an apartment-house can know that the distribution board in the corresponding living room is in overcurrent condition by checking the lighting of an alarm lamp 7 in a patrol or checking the alarm outputted from the central monitor circuit 6 in a monitor room. Next, the person in charge of management can distinguish whether there is any danger of electric fire by checking the presence of the resident of the corresponding living room. What is more, when it gets out of the overcurrent condition by the switch-off of an electric apparatus, whether the resident is present or not present, the alarm lamp 7 goes out automatically, and also the contact of the central monitor circuit 6 opens, and it automatically recovers to the normal condition.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for preventing an electrical fire from occurring in a room of a condominium when a resident is absent.

(Prior Art) Conventionally, in order to prevent electrical fires from occurring in the living rooms of communal housing such as dormitories and apartments, when going out, a power switch (usually a no-fuse breaker or (earth leakage circuit breaker) is turned off. The manager, guard, or other person in charge of the apartment complex will always be on regular patrol, and the power indicator light (11 in Figure 4) installed outside the entrance to each room will blink to indicate that the power is turned off when the apartment is not occupied. I've confirmed it.

BACKGROUND ART In recent years, electrical appliances that are constantly in use, such as electric refrigerators, have become popular. When electrical appliances such as these that are constantly operated are installed in rooms in apartment complexes, there is a risk of an electrical fire occurring due to forgetting to turn off the appliance or unplug it when the resident is not present. There is a growing problem. To solve this problem.

For example, as shown in Figure 4, the electrical distribution board in the living room is modified,
That is, circuits for electrical appliances such as electric refrigerators that are constantly operated are separated from lighting/outlet circuits to create dedicated circuits. However, with this method, there is still a possibility that the user may forget to turn off the switch in another circuit, for example, the earth leakage breaker 2 of the lighting/outlet circuit shown in FIG.

(Problems to be Solved by the Invention) The present invention attempts to solve the above-mentioned problem, and is to monitor visually or centrally monitor the warning lights installed near the entrances and exits of each room from the outside in the living rooms of a condominium. By doing so, you can prevent electrical fires from occurring due to forgetting to turn off electrical appliances or forget to unplug them when the resident is not present, without turning off the power switch or even entering each room. This is an attempt to provide a method that can do this.

(Means for Solving the Problems) As a result of intensive studies to solve the above problems, the inventors have found
We have arrived at the present invention. In other words, one aspect of the present invention is.

Near the exit entrance of each room in the apartment building, there is a function to compare the magnitude of the current value used and the set value, (b) an alarm transmission function, and (c)
) By installing a separate overcurrent monitoring device that has a function that automatically resets the alarm when the operating current value once exceeds the set value and then decreases, and monitoring overcurrent based on the presence or absence of the alarm,
The gist of this invention is a method for preventing electrical fires in living rooms, which is characterized by monitoring the presence or absence of the risk of electrical fires caused by electrical appliances.

Next, one embodiment of the present invention will be explained in detail based on the drawings.

FIG. 1 is an electrical circuit diagram of a living room for explaining the present invention in detail, and is an example in which an overcurrent monitoring device with an alarm function is installed in the lighting/outlet circuit of each living room. In the figure,
1 is a power distribution board in the living room, 2 is an earth leakage breaker for the lighting/outlet circuit, 3 is an earth leakage breaker for the air conditioner circuit, 4 is a remote-operated magnetic contactor, and 5 is installed in the lighting/outlet circuit. Overcurrent monitoring device, 6 is a central monitoring circuit, 7 is a warning light of overcurrent monitoring device 5, 8 is a lighting equipment, 9
10 is a power outlet, and 10 is an air conditioner. A power supply voltage of 100 volts is applied to the lighting/outlet circuit, and a power supply voltage of 200 volts is applied to the air conditioner circuit. FIG. 2 is a diagram showing an embodiment of the method of the present invention, and is a diagram for explaining the operation of the warning light 7 of the overcurrent monitoring device 5 shown in FIG. In addition, the third
and 4 are diagrams for explaining the conventional method, in which 1 is a room distribution board, 11 is a power indicator light, and 12 is an earth leakage breaker for an electric refrigerator circuit, and the electric refrigerator circuit has a power supply voltage of 100
A voltage of volts is applied.

In the method of the present invention, an overcurrent monitoring device 5 is individually installed near the exit entrance of each room in an apartment complex.

As mentioned above, the overcurrent monitoring device 5 according to the present invention is
(a) Comparison function between the current value used and the set value.

It has three functions: (b) an alarm sending function and (c) a function that automatically resets the alarm when the used current value once exceeds a set value and then decreases.

This (a) size comparison function between the current value used and the set value is:
A current comparison circuit compares the used current value with a set value, and when the used current value becomes larger than the set value, a signal that can issue an alarm is output. Also, Q)) The alarm transmission function is to input the output signal to the alarm transmission circuit, and then amplify it to a level that can turn on a warning light, etc., and turn on the warning light, etc. Furthermore, (c) the function that automatically resets the alarm when the used current value once exceeds the set value and then decreases means that when the used current value exceeds the set value, an alarm is sent. The alarm is not held physically or mechanically, and the alarm is automatically reset when the operating current value decreases.

For example, the overcurrent monitoring device 5 is 9.

A current monitoring device that combines the above functions (a), (b), and (c), such as a current detection application circuit that combines a current transformer, rectifier and smoothing circuit, current comparison circuit, level amplification circuit, alarm transmission circuit, etc. If so, you can use it.

In the method of the present invention, the above-mentioned overcurrent monitoring device 5 is individually installed near the entrance to each living room, and overcurrent is monitored based on the presence or absence of an alarm, thereby reducing the risk of electrical fires caused by electrical appliances. The aim is to monitor the presence or absence of This method will be explained based on FIG.

FIG. 2 shows the warning light 7 of the overcurrent monitoring device 5 shown in FIG.
In FIG. 1, the horizontal axis represents the current value, and the vertical axis represents the operating value when the warning light 7 is turned on or off due to changes in load.

In the method of the present invention, first, when the load on the lighting/outlet circuit increases and exceeds the set value of the overcurrent monitoring device 5 (in the example shown in FIG. 2, it is set to 5 amperes), the warning light 7 lights up. At the same time, a contact is output to the central monitor circuit 6.

The manager, guard, or other person in charge of the management of the apartment complex confirms that the warning light 7 is lit during the 9th round, or confirms the alarm output from the central monitor circuit 6 in the monitor room.
The living room distribution board 1 of the relevant living room is in an overcurrent state.

In other words, it can be seen that the electrical appliance in the corresponding room is in use. Next, the manager can determine whether there is a risk of an electrical fire by confirming the presence or absence of a resident in the room.

That is, if a resident is present in the room, the overcurrent state is under the control of the resident, so there is no danger of electrical fire, and the overcurrent state may be left as is. On the other hand, if the resident is not present, the overcurrent condition is abnormal and there is a risk of fire due to overheating of the electrical appliances, and the person in charge of management should immediately enter the relevant room and turn off the electrical appliances. It is necessary to turn off the switch, which can prevent electrical fires from occurring. Note that the overcurrent condition is eliminated by switching off the electrical appliance. In other words, if the setting value of the overcurrent monitoring device 5 becomes less than the operating clearance value (in the example of FIG. 2, the operating clearance value is set to 1 ampere, so less than 4 amperes), the overcurrent will be activated regardless of whether or not a resident is present. First, the warning light 7 is automatically turned off and the contact of the central monitoring circuit 6 is opened, automatically returning to the normal state.

(Function) The method of the present invention has a function of comparing the magnitude of the used current and the set value;
An overcurrent monitoring device that has an alarm sending function and a function that automatically resets the alarm when the used current exceeds a set value and then decreases is installed individually near the exit entrance of each room, and monitors overcurrent based on the presence or absence of an alarm. This method attempts to monitor the presence or absence of the risk of electrical fires caused by electrical appliances. According to this method, it is possible to monitor the presence or absence of the risk of electrical fires caused by electrical appliances in apartment buildings without turning off the power switch. To prevent electrical fires from occurring due to forgetting to turn off electrical appliances or forget to unplug electrical appliances without entering the room.

(Example) Hereinafter, the present invention will be specifically explained based on Examples.

Examples 1 and 2 A current transformer and a rectifying and smoothing circuit are installed near the distribution board 1 in the living room.

An overcurrent monitoring device 5 consisting of a current detection application circuit that combines a current comparison circuit, a level amplification circuit, an alarm transmission circuit, etc. is installed, and the lighting/outlet circuit shown in Fig. 1 and a 5 watt orange warning light 7 are installed. Incorporated a lamp. Next, as shown in Table 1, two types of loads were prepared. The load in Example 1 is only a base load meter of 400 watts (current value α = 4 amperes), while the load in Example 2 is a base load meter of 400 watts (current value α = 4 amperes).
ampere) and the minimum load of the electric heating appliance is 300 watts (current value β = 3 amperes).

Next, the overcurrent setting value T of the overcurrent monitoring device 5 was set to 5 amperes, the operating gap value of the overcurrent monitoring device 5 was set to 1 ampere, and an operation test was performed to turn on and turn off the warning light 7 of the overcurrent monitoring device 5. went. The results are shown in Figure 2.

As is clear from Table 1 and Figure 2, in Embodiment 1, the load is only the base load, so the current value is α and T, and the warning light 7
didn't light up at all. On the other hand, in Example 2, the electric heating appliance load was added to the base load, so the current value was α+β〉T
As a result, warning light 7 was lit. At this time, when the electric heating appliance was turned off, the warning light 7 was automatically turned off and the normal state was restored. It should be noted that this warning light could be clearly turned on and off even if it was not in front of the entrance to the room, for example, from the hallway about 100 meters away from the room.

(Effects of the Invention) The method of the present invention includes installing an overcurrent monitoring device having the above-mentioned function in a circuit in each room distribution board in a living room of a condominium;
The purpose is to monitor overcurrent mainly when using electric heating appliances based on the presence or absence of the alarm. 1. According to the method of the present invention, the system can detect overcurrents without turning off the power switch or even entering each room. It is possible to prevent electrical fires from occurring due to forgetting to turn off electrical appliances or forget to pull out plugs when residents are absent. Also.

By changing the overcurrent setting value of the overcurrent monitoring device,
Even if the type and number of base loads and the type and number of electric heating appliances are changed, electrical fires can be prevented from occurring. Further, if the presence or absence of an alarm can be confirmed in the monitor room, the manager, guard, or other person in charge of managing the apartment complex can always check the presence or absence of the alarm.

FIG. 2 is a diagram for explaining the operation of the warning light of the overcurrent monitoring device shown in FIG. 1, and FIGS. 3 and 4 are diagrams for explaining the operation of the warning light of the overcurrent monitoring device shown in FIG.

FIG. 2 is a diagram for explaining a conventional method.

1: Room distribution board, 2: Earth leakage breaker for lighting/outlet circuit, 3: Earth leakage breaker for air conditioner circuit, 4:
Remotely operated electromagnetic contactor, 5: Overcurrent monitoring device installed in the lighting/outlet circuit, 6: Central monitoring circuit, 7: Warning light of overcurrent monitoring device 5, 8: Lighting equipment, 9
: Outlet, 10: Air conditioner, 11: Power indicator light, 12: Earth leakage circuit breaker for electric refrigerator circuit Patent applicant Unitika Co., Ltd.

Claims (1)

[Claims] (1) Near the exit entrance of each room in the apartment building, (a) a function to compare the magnitude of the current used and the set value, (b) a function to send an alarm, and (c) a function to detect when the current used exceeds the set value and then decreases. It is characterized by separately installing an overcurrent monitoring device that has a function to automatically reset the alarm, and monitoring overcurrent based on the presence or absence of an alarm, thereby monitoring whether there is a risk of an electrical fire caused by electrical appliances. How to prevent electrical fires in living rooms.