KR102530907B1 - Apparatus for preventing freezing of the valve for air respirator mask and the method for controlling thereof - Google Patents

Abstract

The present invention relates to a device for preventing freezing of a valve of an air respirator faceplate and a control method therefor, in order to prevent the intake valve or exhaust valve from being cooled or frozen by outside air in winter by installing a heating device at the inlet or outlet of the facepiece for an air respirator. It is for
To this end, the present invention provides a power supply unit for supplying operating power to the heating unit, and a plurality of heating units installed in the intake and exhaust vents formed in the nose cup of the face of the air respirator and operating by the driving current provided by the power supply unit to generate heat. , A power switch that is turned on/off by user manipulation and regulates the power supplied to each heating part from the power supply part, and a temperature installed on one side of or around the intake or exhaust vent of the nose cup to measure the intake or exhaust vent or its surrounding temperature Including the control unit that controls the power supplied from the power supply unit to each heating unit according to the temperature detection signal of the sensing unit, the temperature sensing unit, or the on/off operation status of the power switch, the firefighter's shift or other Even if you have to take off the face of the respirator for a while to perform other tasks, prevent the intake valve or exhaust valve of the face of the respirator from cooling or freezing so that it can be put back on immediately if necessary to perform efficient work.

Description

Apparatus for preventing freezing of the valve for air respirator mask and the method for controlling it}

The present invention relates to a valve freezing prevention device of an air respirator faceplate and a control method thereof, and more particularly, by installing a heating device at the intake or exhaust port of the air respirator faceplate to cool or freeze the intake valve or exhaust valve by outside air in winter or the like. Even if the air respirator face has to be taken off for a while to perform shifts or other tasks due to long work at the fire site, the intake valve or exhaust valve of the air respirator face is not cooled or frozen so that it can be re-opened immediately if necessary. It relates to a valve freezing prevention device for an air respirator facepiece that can be worn and used stably and solves problems such as inability to breathe and valve damage due to valve freezing to efficiently perform fire suppression work and a control method thereof.

In general, air respirators are safety equipment used to protect people from suffocation in oxygen-deficient places such as industrial and fire sites or places contaminated with toxic gases. It is mainly used by workers who have to work at industrial sites with

In particular, the air respirator used by firefighters supplies compressed air from an air container loaded in the form of a backpack to the inside of the facepiece through a ventilation hole so that the firefighter can breathe safely. It plays an important role in protecting firefighters from toxic gases by communicating compressed air.

A nose cup is provided on the inside of the air respirator to seal the wearer's nose and mouth, the upper center of the nose cup or on both sides of the upper left and right sides of the nose cup, inlet holes are formed for air intake, and the front of the nose cup is for air discharge. Exhaust ports are formed, and intake valves and exhaust valves are respectively installed in the intake and exhaust ports. In addition, an intake passage through which intake air passes is formed between the nose cup and the facepiece, and the intake air passing through the intake passage is configured to be sucked into the wearer's respiratory system through the intake port of the nose cup.

However, if you wear this respirator at a fire site and continue firefighting for a long time, moisture from breathing or secretions such as sweat or saliva from hard work will inevitably be discharged, and these moisture or secretions will be discharged from the face of the respirator. There are also problems that obstruct the flow of fresh air by blurring the viewing window or wetting the intake/exhaust valves installed in the intake/exhaust ports of the nose cup.

In addition, if you need to take off the face of the respirator for a while for a shift during long-term firefighting work or to perform other tasks, especially in winter when the temperature is low, if you take off the face of the respirator even for a short time, Intake valves and exhaust valves are easily cooled and frozen by surrounding moisture or secretions, etc. problems such as

KR 10-1474519 B1 2014.12.12. registration KR 10-1509613 B1 2015.04.01. registration

Therefore, the present invention has been made to solve the above problems, and the technical problem to be solved by the present invention is to install a heating device in the inlet or outlet of the air respirator face and automatically drive the heating device according to the ambient temperature. By preheating the inlet or outlet to prevent the intake or exhaust valve from being cooled or frozen by outside air in winter, the face of the respirator is temporarily removed to perform firefighter shifts or other tasks due to long-time work at the fire site. Even if it must be taken off, the intake valve or exhaust valve of the air respirator faceplate is prevented from being cooled or frozen, so that it can be re-equipped immediately if necessary and used stably. It is intended to provide a valve freezing prevention device and a control method of an air respirator face that enables fire suppression work to be performed.

One embodiment of the present invention for achieving the above object is installed in the power supply unit for supplying operating power to the heating unit, the intake and exhaust vents formed in the nose cup of the face of the air respirator, and operated by the driving current provided by the power supply unit. A plurality of heating parts that generate heat by using a power switch, a power switch that is turned on/off by user manipulation and regulates the power supplied to each heating part from the power supply part, installed on one side or around the intake or exhaust vent of the nose cup, A temperature sensor for measuring the temperature of the exhaust port or its surroundings, a control unit for controlling the power supplied from the power supply unit to each heating unit according to the on/off operation status of the power switch and the temperature detection signal of the temperature sensor, It is a valve freeze prevention device.

Another embodiment of the present invention for achieving the above object is installed on the nose cup of the air respirator face, and is driven by the operating power of the power supply unit to generate heat, a plurality of heating units, power supply for power regulation of each heating unit In the control method of the valve freezing prevention device of the face of the air respirator including a switch, a temperature sensor for measuring the temperature of the inlet or outlet of the nose cup or its surroundings, and a control unit for controlling the power of each heating unit, the power switch is turned on/off. The first step of determining the OFF operation state, supplying operating power to the temperature sensor, and checking the air intake or exhaust port of the nose cup or its surrounding temperature measured by the temperature sensor, the measured temperature of the temperature sensor checked in the first step. A second step of determining whether the value is lower than the preset first reference temperature or higher than the preset second reference temperature, and controlling the power supply unit to supply or cut off driving current to each heating unit according to the determination result of the second step. It is a method of controlling the valve freezing prevention device of the air respirator face, including a third step of doing.

According to the present invention, it is possible to prevent the intake valve and the exhaust valve from being cooled by outside air in the winter season by installing a heating device on the intake or exhaust port formed on the nose cup of the nose cup for an air respirator and automatically driving the heating device according to the ambient temperature. Therefore, it prevents moisture or secretions remaining on the inlet or outlet of the face of the air respirator or the conduit connected thereto from being cooled by the outside air in advance, resulting in inability to ventilate the face of the air respirator in winter or damage to the valve. It provides an advantage that can solve the problem of deterioration of durability of the respiratory system.

In addition, according to the present invention, due to the nature of firefighting sites where long-term work is impossible while wearing an air respirator, the heating device is automatically driven even when the face of the respirator needs to be temporarily removed to perform a firefighter's shift or other work. Since it is possible to prevent the intake and exhaust valves of the intake and exhaust ports from freezing, it provides the advantage of enabling efficient firefighting by promoting immediate re-wearing and convenient use when necessary.

1 is a perspective view illustrating an excerpt of a nose cup in which a valve freezing prevention device of an air respirator faceplate according to the present invention is installed.
Figure 2 is a driving circuit block diagram of the device for preventing freezing of the valve face of the air respirator according to the present invention.
Figure 3 is an operation flow chart illustrating a method for controlling the valve freezing prevention device of the face of the air respirator according to the present invention.

Hereinafter, the configuration and operation of the air respirator faceplate valve freezing prevention device and its control method according to a preferred embodiment of the present invention and the effect thereof will be described in detail with reference to the accompanying drawings.

The terms or words used in this specification and claims are not limited to the usual or dictionary meanings, and the inventor can properly define the concept of the term in order to explain his or her invention in the best way. Based on this, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention. Therefore, since the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, it is understood that there may be various equivalents and modifications that can replace them at the time of this application. shall.

1 is a perspective view illustrating an extract of a nose cup in which a valve freezing prevention device of an air respirator faceplate according to the present invention is installed, and FIG. 2 is a driving circuit block diagram of a valve freezing prevention device of an air respirator facepiece according to the present invention As illustrated in FIG. 1, the device for preventing valve freezing of the face of the air respirator according to the invention is installed on the outside of the intake port 2 and the exhaust port 3 of the nose cup 1 of the air respirator face, as illustrated in FIG. As described above, it may include a power supply unit 10, a plurality of heating units 20a and 20b, a power switch sw, a temperature sensor 30, and a control unit 40. Among the elements constituting the device of the present invention, it is preferable that the plurality of heating units 20a and 20b and the temperature sensing unit 30 are installed on the nose cup 1, and the power supply unit 10 and the power switch (sw) And the control unit 40 is preferably installed on one side of the outer face of the air respirator. The valve freezing prevention device of the air respirator face of the present invention is formed on the nose cup (1) installed inside the air respirator face, and the nose cup formed on the lower front of the face of the air respirator so that it can be closely adhered to the skin around the wearer's nose and mouth. It can be implemented by being applied to the air respirator facepiece including a ventilating part for communicating the air of the external air box to the inside of (1) or exhausting the internal air discharged from the nose cup (1) to the outside.

The power supply unit 10 is composed of a battery power source for convenient portability and movement, and is installed on one side of the outer face of the air respirator for easy storage and replacement of the battery by the user. The power supply unit 10 is electrically connected to the heating unit and each part of the device to supply operating power required by the heating unit and each part of the device, and includes a relay controlled by a control unit 40 to be described later. It is preferable that the control unit 40 turns on/off the contacts of the relay to supply or cut off operating power to each of the heating units 20a and 20b.

A plurality of heating parts (20a, 20b) are installed in the intake port (2) and the exhaust port (3) formed in the nose cup (1) of the air respirator face, respectively, and are formed by any one selected from a hot wire and a paper heating element to supply power ( It is driven by the operating power provided in 10) and generates heat. Each of these heating parts 20a and 20b is installed as a whole along the circumference of each edge of the intake port 2 and the exhaust port 3 of the nose cup 1, but to prevent direct contact with the wearer's skin, the outside of the edge circumference (eg For example, it is installed on the opposite side of the wearer's skin contact surface), and is preferably formed entirely coated with an insulating material to prevent electric shock when exposed to the wearer's skin.

The power switch (sw) is configured to select an on/off operation by a user's manipulation, and is installed between the power supply unit 10 and each heating unit 20a, 20b, so that each heating unit 20a in the power supply unit 10 , 20b) regulates the operating power supply. This power switch (sw) is installed on one side of the power supply unit or on the outer side of the face for an air respirator so that the user can easily operate it.

The temperature sensor 30 is installed on one side of or around the intake port 2 or the exhaust port 3 of the nose cup 1 to measure the temperature of the intake port or the exhaust port or its surroundings. The temperature sensor 30 is directly connected to the intake port 2 or exhaust port 3 of the nose cup 1, or to the intake port 2 or exhaust port 3 of the nose cup 1 to easily measure the ambient temperature. It is installed in contact or installed in a position close to its periphery.

The controller 40 is composed of a microprocessor having a plurality of input terminals and output terminals, the power switch (SW) and the temperature sensor 30 are connected to the input terminal, and the relay of the power supply unit 10 is connected to the output terminal. Then, according to the on/off operation state of the power switch sw and the temperature detection signal of the temperature sensor 30, the relay of the power supply unit 10 is turned on/off to supply power to the heating units 20a and 20b. to control The controller 40 may be installed on the nose cup 1 or on one side of the outer face of the air respirator, and when the power switch sw is turned on by user manipulation, the temperature sensor 30 operates. Power is supplied and the output of the temperature sensor 30 is checked, and under the condition that the temperature value measured by the temperature sensor 30 is lower than the preset first reference temperature t1, each heating unit 20a, 20b The relay of the power supply unit 10 is controlled to supply driving current, and the temperature value measured by the temperature sensor 30 is higher than the preset second reference temperature t2, supplied to each heating unit 20a, 20b. Characterized in that it is programmed to control the relay of the power supply unit 10 to cut off the driving current. The control unit 40 presets a first reference temperature t1 and a second reference temperature t2 for controlling the driving of the heating units 20a and 20b by the temperature measured by the temperature sensor 30. can be saved Here, the first reference temperature t1 and the second reference temperature t2 may be set and stored in advance during initial setting, and may be configured to be changed as needed. That is, the first reference temperature t1 is a temperature value within a range higher than the temperature at which the intake valve or the exhaust valve is frozen when the intake or exhaust port is cooled by outside air in winter, and is, for example, a specific temperature value within the range of 0 to 5°C. The second reference temperature t2 may be set as a temperature value, and the second reference temperature t2 is a temperature value within a range lower than a temperature at which an intake valve or an exhaust valve frozen by outside air in winter can be sufficiently thawed, and is, for example, in the range of 10 to 20°C. It may be set to a specific temperature value among the temperature values within. In addition, the shorter the distance between the first reference temperature t1 and the second reference temperature t2, the shorter the driving time of the heating unit, thereby reducing battery consumption and extending the battery replacement period. There may be a risk of malfunction due to insufficient defrosting of the intake valve or exhaust valve, and conversely, the wider the gap, the longer the operating time of the heating unit, which may increase battery consumption and shorten the battery replacement period. It is desirable to set each reference temperature by

Figure 3 is an operation flow chart illustrating a method for controlling the valve freezing prevention device of the air respirator faceplate according to the present invention, the method for controlling the valve freezing prevention device of the air respirator facepiece according to the present invention is an on / off operation state of the power switch (sw) According to this, the control unit 40 performs, and as illustrated in the drawing, it determines the on/off operation state of the power switch (sw) to supply operating power to the temperature sensor 30 and to the temperature sensor 30. A first step (S101-S104) of checking the temperature of the intake port 2 or the exhaust port 3 of the nose cup 1, or its surrounding temperature measured by The second step (S105, S106) of determining whether it is lower than the first reference temperature (t1) or higher than the preset second reference temperature (t2), and each heating unit (20a, 20b) according to the determination result of the second step A third step (S107, S108) of controlling the power supply unit 10 to supply or cut off the driving current may be included. Here, the third step is to supply driving current to each heating unit 20a, 20b when the temperature value measured by the temperature sensor 30 is lower than the preset first reference temperature t1 (Y branch of S105). Controlling the relay of the power supply unit 10 (S107), if the temperature value measured by the temperature sensor 30 is higher than the preset second reference temperature t2 (Y branch of S106), each heating unit ( Controlling the relay of the power supply unit 10 to cut off the driving current supplied to 20a and 20b) (S108).

The effect of the anti-freeze valve of the face of the air respirator configured as described above and the control method thereof will be described as follows.

First, the control unit 40 sets a temperature value within a range higher than the temperature at which the intake valve or exhaust valve is frozen when the intake or exhaust port is cooled by outside air in the winter, for example, as a specific temperature value among temperature values within the range of 0 to 5°C. A temperature value within a range lower than the temperature at which the first reference temperature t1 is set and sufficiently thawed the intake valve or exhaust valve frozen by outside air in winter, for example, a specific temperature value within the range of 10 to 20 ° C The second reference temperature t2 is set as a temperature value.

In the state where each reference temperature is set in this way, if there is a concern that the intake valve or exhaust valve may freeze due to the cooling of the intake or exhaust air by outside air during the winter season, if the power switch (sw) is operated in the on state by user manipulation (S101 Y branch of) The control unit 40 supplies operating power to the temperature sensor 30 (S103) and checks the output of the temperature sensor 30 (S104) to measure the nose cup ( It is determined (S105, S106) whether the intake port 2 or the exhaust port 3 of 1) or the surrounding temperature is lower than the preset first reference temperature t1 and higher than the preset second reference temperature t2. .

At this time, when the intake or exhaust or the intake or exhaust valve is cooled or frozen by outside air in the winter, the temperature of the intake or exhaust port 2 or exhaust port 3 of the nose cup 1 measured by the temperature sensor 30 or its surrounding temperature value will be lower than the preset first reference temperature (t1), and the heating of each heating unit (20a, 20b) continues, so that the intake port (2) or exhaust port (3) of the nose cup (1) is preheated or not in winter From spring to autumn, the intake port 2 or the exhaust port 3 of the nose cup 1 or the ambient temperature value will be higher than the preset first reference temperature t1.

Accordingly, the control unit 40 determines that when the temperature value of the intake port 2 or the exhaust port 3 of the nose cup 1 measured by the temperature sensor 30 or its surrounding temperature is lower than the preset first reference temperature t1 (S105 Y branch of) The relay of the power supply unit 10 is controlled to be turned on to drive each heating unit 20a and 20b (S107). As a result, when each heating part (20a, 20b) generates heat, the intake port (2) or exhaust port (3) of the nose cup (1) is preheated, and the temperature of the intake valve or exhaust valve can also be raised. If the intake or exhaust, or intake or exhaust valves are cooled or frozen by the air, they are gradually thawed to enable ventilation through each valve, or intake, exhaust, or intake valves that may be cooled or frozen by outside air in winter Freezing of the exhaust valve can also be prevented in advance.

On the other hand, as described above, if the heat of each heating part 20a, 20b continues and the intake port 2 or exhaust port 3 of the nose cup 1 continues to preheat, the intake port 2 or the exhaust port of the nose cup 1 ( 3) or its ambient temperature value will rise.

Thereafter, the control unit 40 checks again the temperature value of the intake port 2 or the exhaust port 3 of the nose cup 1 measured by the temperature sensor 30 or its surrounding temperature, When the inlet port 2 or the outlet port 3 of the cup 1 or the ambient temperature value is higher than the preset second reference temperature t2 (Y branch of S106), the relay of the power supply unit 10 is controlled to be off so that each The driving of the heating units 20a and 20b is blocked (S108).

As described above, in the present invention, when the outdoor air is lower than the predetermined first reference temperature in cold weather in winter, power is supplied to the heating unit to heat the intake and exhaust ports of the nose cup until the temperature is higher than the second reference temperature. , it is possible to prevent the intake valve and the exhaust valve from being frozen by outside air such as in cold weather in winter.

According to the present invention, by installing a heating unit on the intake or exhaust ports formed on the nose cup of the air respirator face, it is possible to prevent the intake valve and the exhaust valve from freezing due to the cooling of the outside air in the winter season. It is possible to solve the problem of inability to ventilate the face of the air respirator due to the vapor or water remaining on the exhaust port or the conduit connected thereto being frozen by the outside air, or the problem of lowering the durability of the air respirator due to valve damage. .

In addition, according to the present invention, due to the nature of firefighting sites where long-term work is impossible, the intake valve and exhaust valve of the intake or exhaust port are cooled or frozen by outside air in the winter season even when the firefighters have to take off the face of the air respirator for a shift or rest. can be prevented, promoting convenient use and enabling efficient firefighting work.

1: Nose Cup 2: Inlet
3: exhaust port 10: power supply
20a, 20b: heating unit 30: temperature sensing unit
40: control unit sw: power switch

Claims (8)

A power supply unit 10 for supplying operating power to the heating unit and each part of the device;
A plurality of heating units that are formed of one selected from a hot wire and a paper heating element and are installed in the intake and exhaust vents formed in the nose cup of the air respirator face and are driven by the operation power supplied from the power supply unit 10 to generate heat. (20a, 20b);
A power switch (sw) that is turned on/off by a user's manipulation and regulates operating power supplied from the power supply unit to each of the heating units 20a and 20b;
a temperature sensor 30 installed on one side of or around the intake port 2 or exhaust port 3 of the nose cup 1 to measure the temperature of the intake port or the exhaust port or its surroundings;
A controller for controlling power supplied from the power supply unit 10 to each heating unit 20a and 20b according to the temperature detection signal of the temperature sensor 30 or the on/off operation state of the power switch sw 40); including,
Each of the heating parts 20a and 20b,
It is installed along the circumference of each edge of the intake port 2 and the exhaust port 3 of the nose cup 1 and is coated with an insulating material so that there is no risk of electric shock when exposed to the wearer's skin.
The control unit 40,
In the state where the power switch (sw) is turned on, the output of the temperature sensor 30 is checked, and when the temperature measured by the temperature sensor 30 is lower than the preset first reference temperature, the power supply unit 10 is controlled to A driving current is supplied to each heating unit 20a and 20b, and when the measured temperature of the temperature sensor 30 is higher than the preset second reference temperature, the power supply unit 10 is controlled to It is programmed to cut off the driving current,
The first reference temperature is set to a temperature value within a range higher than a temperature at which an intake valve or an exhaust valve is frozen when an intake or exhaust port is cooled by outside air in winter,
The second reference temperature is set to a temperature value within a range lower than a temperature that can sufficiently thaw the intake valve or the exhaust valve frozen by outside air in winter.
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