JP2003085663A - Mist jetting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the mist jetting ability at a low temperature in a mist jetting device provided with a container for storing jetting liquid, a pump for sucking out the jetting liquid inside the container and feeding it to a heater and the heater for heating the jetting liquid to a high temperature, turning it into a misty state and jetting it from a nozzle. SOLUTION: A heat radiation plate is provided inside the container and a thermostat and the heater are provided near a connection part with the container of a metallic pipe. The heat radiation plate, the thermostat and the heater are thermally connected to each other via the metallic pipe and metal parts such as a nut connecting the pipe and the container.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a device that is activated by an intrusion alarm signal or the like when a thief invades. The present invention relates to a fog injection device that enables the mist injection device.

[0002]

2. Description of the Related Art A fog injection device is used by installing it in a room where a safe is placed or in a store of a precious metal store where many showcases displaying precious metals such as jewelry and luxury watches are lined up. When a thief detects a thief, the fog is sprayed for a certain period of time to make the interior of the room poor in visibility and prevent the thief from acting. The basic principle of generating fog is well known and partly put to practical use.

The basic structure of the apparatus comprises a container for storing the jetted liquid, a pump for sucking the jetted liquid in the container and sending it to a heater, and a heater for heating the jetted liquid to a high temperature and atomizing it to jet it from a nozzle. In addition, it is equipped with a control unit that controls the operation and stop of the pump and the temperature of the heater.

As a method for sending the injection liquid to the heater, without using a pump, the container holding the injection liquid is kept in a hermetically sealed state, heated to a high temperature and brought to a high pressure state, and a pipe connecting the container and the heater is provided. A device that employs a structure that opens and closes a provided valve has also been put into practical use.

[0005]

In the conventional fog injection device equipped with a pump, the capacity of the pump is determined according to the viscosity of the injection liquid, and the capacity of the pump is limited. There is a problem in that the increase in viscosity directly leads to a decrease in jetting ability. In the method of keeping the container in which the jet liquid is stored in a sealed state, heating it to a high temperature and keeping it in a high pressure state, not only the heating device but also this container must be heated to a high temperature, so the power consumption is low. There was a problem of increase. Also, when the mist is sprayed and the amount of jetted liquid in the container has decreased, the work to replenish the jetted liquid is to stop the heating of the container, cool the container to near room temperature, and then Since it has to be done, there is a problem that work efficiency is poor.

[0006]

In order to solve the problems of the conventional fog jetting device and to further improve the fog jetting performance, detailed examination including characteristics of the jetting liquid was conducted. As a result, it has been found that there are various types of jet liquid having the property of efficiently generating fog, and many of them are excellent in terms of price and safety. However, it was also found that among them, the viscosity increases as the ambient temperature decreases. Therefore, the mist injection device equipped with a pump is improved, and a heat retaining device is added to the container so that the same performance as that at room temperature can be maintained even if the ambient temperature decreases.

[0007]

1 is a block diagram showing the outline of a fog jetting apparatus of the present invention. Reference numeral 1 is a container for storing the ejected liquid, 2 is a pump, 3 is a heater for rapidly heating the ejected liquid to produce mist, and 4 is a nozzle for ejecting the mist. 5
Is a metal pipe for leading the jetted liquid from the container 1 to the heater 3 via the pump 2. The heater 3 has a built-in heating device that has been kept at a high temperature in advance, and the jet liquid vigorously flowing in due to the action of the pump 2 is rapidly heated here, becomes a mist, and jets from the nozzle 4. . In addition to this, the mist injection device receives a start signal for mist injection, and the pump 2
Is provided with a control unit (not shown) that functions to drive the heater 3 for a predetermined time and to keep the temperature of the heater 3 constant.

Further, a heat radiating plate 6 is provided inside the container 1, and a thermostat 7 and a heater 8 are provided near the connecting portion of the metal pipe 5 with the container 1. The heat sink 6, the thermostat 7, and the heater 8 are made of metal pipe 5 and
Through a metal part such as a nut that connects the pipe and the container,
Each is thermally coupled to each other. The entire container 1,
A portion of the metal pipe including the thermostat 7 and the heater 8 on the container 1 side is covered with a heat insulating material 9. As the injection liquid, a mixed liquid of propylene glycol (propanediol), polyethylene glycol, etc. and water is generally used.

The mist ejecting apparatus having the above-mentioned structure is installed in a key caution area where a safe or the like is placed, and injects mist in response to a start signal from a security system that operates when a thief invades. Since the mist ejecting device needs to eject the mist immediately upon receiving the activation signal, the power is supplied from before the security system is set (before the warning state is set) so that the heater 3 is preheated. Has become. Even when the security system is reset (in the released state), the power supply to the heater 3 is usually continued.

The security system of the important caution area is set in the unmanned time zone such as nighttime and holidays, and naturally the power supply of the air conditioning equipment there is often turned off. Therefore, although the fog spraying device is a device installed indoors, it is exposed to a high temperature environment in the summer and a low temperature environment in the winter, and even in such a situation,
It is required to operate reliably. The jet liquid is required to have a property of generating a large amount of thick fog with a small amount, and in addition to such basic properties, it has been found that the viscosity property of the liquid is also important.

It has been found that the jetting liquid itself does not freeze even if it is placed in an environment below freezing, but its viscosity increases in many cases as the temperature becomes lower than room temperature. The increase in the viscosity of the injection liquid means that the pump 2 is heavily loaded and the mist injection capability is reduced. In order to avoid this, in the fog spraying device of the present invention, when the temperature falls below a predetermined temperature, the thermostat 7 is activated, the heater 8 is turned on, and the heat sink 6 is heated. By doing so, the jetted liquid in the container is heated before the viscosity becomes high, the low viscosity state is maintained, and the operation of the pump 2 is not hindered.

When the jetted liquid is warmed by the heat generated from the heat radiating plate 6, its temperature is transmitted to the thermostat 7 through the metal pipe 5, and it is detected that the temperature has risen to a predetermined temperature or higher, and the heater 8 is detected. Turn off. Since the entire container 1 and the portion of the metal pipe including the thermostat 7 and the heater 8 on the container 1 side are covered with the heat insulating material 9, the heat generated from the heat dissipation plate 6 does not escape to the outside efficiently. It is transmitted to the jet liquid.

In the fog jetting apparatus of the present invention, a transparent container 1 is adopted, and the heat insulating material 9 is provided with a vertically long slit-shaped notch 10 so that the heat radiating plate 6 in the container 1 can be seen from the outside. I did it. In this way, it is possible to easily confirm the remaining liquid surface of the jetted liquid in the container 1. This is because the surface of the heat dissipation plate 6 is treated to have a high light reflectance to reflect incident light from the outside through the liquid surface. The means for warming the jet liquid is not limited to the above-mentioned configuration, and may be one that heats the container 1 by applying heat from the outside. The heater 3 and the container 1 may be placed close to each other and the residual heat generated from the heater 3 may be used.

In the fog jetting apparatus, one fog jetting time is determined according to the size of the room in which it is installed. The fog once filled will not disappear for a while unless the room is ventilated, so the next activation signal was not accepted during that time. By doing so, even if the thief moves around and the start signal is continuously input,
It is possible to prevent wasteful use of the injection liquid, since wasteful mist injection is not performed.

[0015]

According to the fog jetting device of the present invention, the heat retaining device provided in the container 1 is operated in accordance with the characteristics of the jetting liquid used, and the viscosity of the propellant hinders the operation of the pump 2. Since it is prevented from becoming too high, it is possible to always obtain a constant fog injection capability without being affected by the ambient temperature.

Since the heat retaining device may be operated only when the ambient temperature is lowered, the container holding the jetted liquid is kept sealed and heated to a high temperature without using a pump.
Compared with a device that adopts a configuration in which a valve provided in a pipe connecting a container and a heater is opened and closed in a high pressure state,
Power consumption can be significantly reduced. In addition, it is not necessary to wait for the container to cool to room temperature when replenishing the injection liquid.

Since the heat retaining device uses the heat retaining material 9 so that the heat of the heater 8 can be efficiently transferred to the injection liquid, the power consumption required for the heat retaining can be suppressed to a low level. Moreover,
Since the heat insulating material 9 is provided with the slit-shaped notch 10 and the heat dissipation plate 6 inside the container 1 can be seen from the outside, it is easy to confirm the remaining amount of the jetted liquid.

The injection liquid used in the conventional fog injection device equipped with a pump must be selected in consideration of the viscosity characteristics in addition to the fog generation efficiency, safety, etc. In the injection device, the increase in viscosity due to the decrease in temperature can be prevented by the heat retention device, so that the selection range of the injection liquid is significantly expanded.

[0019]

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a fog injection device of the present invention.

[Explanation of symbols]

1 ... Container 2 ... Pump 3 ... Heater 4 ... Nozzle 5 ... Metal pipe 6 ... Heat sink 7 ... Thermostat 8 ... Heater 9 ... Heat insulation material 10 ... Slit-shaped notch of heat insulating material

Claims (4)

[Claims] 1. A container for storing an injection liquid that vaporizes and diffuses into a mist by being rapidly heated, and sucks the injection liquid for a predetermined time after receiving a start signal,
In a mist injection device comprising a pump for feeding to a heater and a heater for heating and spraying a jetted liquid into a mist and injecting it from a nozzle, the container is provided with a heat retaining device for heating according to the viscosity characteristic of the jetted liquid. A mist ejecting device characterized in that a predetermined mist ejecting ability can be maintained even if the ambient temperature changes. 2. The fog jetting apparatus according to claim 1, wherein the heat retaining device is one in which a heat radiating plate, a heater and a thermostat are thermally coupled, and the heat radiating plate is arranged in the container. . 3. The fog jet according to claim 1, wherein the heat retention device uses residual heat of the heater to prevent the temperature of the injection liquid from falling below a predetermined temperature. apparatus. 4. After performing fog injection for a predetermined time,
The fog injection device according to any one of claims 1 to 3, wherein the start signal is not accepted for a certain period of time.