KR102645962B1 - Electric blower for breathing apparatus - Google Patents

Abstract

The present invention relates to an electric blower for a respiratory device, a housing in which an intake port and an exhaust port are formed on both sides and a blower fan for sucking in and expelling air is installed inside the housing, and is electrically connected to the blower fan to control the blower fan. a controller, and at least one filter installed in the housing, wherein the controller includes a power cutoff notification system that generates an alarm depending on the cutoff state of the supplied power, and supplies purified air necessary for breathing. This relates to an electric blower for breathing apparatus that can provide an alarm in the event of an accidental power cut.

Description

Electric blower for breathing apparatus {ELECTRIC BLOWER FOR BREATHING APPARATUS}

The present invention relates to an electric blower for a respirator, and more specifically, to an electric blower for a respirator to supply breathing air to a respirator worn by a worker.

In general, workers performing work at fire sites or quarantine sites are exposed to the risk of health problems when inhaled by harmful dust, particulate matter, or oxygen-deficient air floating in the air. Accordingly, at work sites, air supply devices that supply breathing air to respiratory protective equipment such as masks, hoods, helmets, or protective clothing worn by workers are used to prevent health problems caused by air inhalation. For example, electric blower type ventilation masks are used. It relies on air supply devices such as these to ensure that workers continue to breathe with positive pressure.

Such a conventional breathing air supply device has a structure that uses an external power source to operate a blower mounted inside and forcibly supplies purified air to the worker through a filter or the like.

In addition, in the case of a general conventional air supply device rather than a personal portable device, breathing is performed by receiving air not only from a short distance but also from a distance of up to 40 m using an air connecting hose, but workers working at a distance must use an air supply device. It was not immediately recognized that the air supply was interrupted due to a power cut or blower failure, and the malfunction of the device was only identified due to lack of air. That is, in the past, people could easily be exposed to dangerous situations due to device failure when working remotely.

In this way, conventionally, when the operation of the air supply device is interrupted due to a power cut during work, the operation can be determined only by workers adjacent to the air supply device or a supervisor outside the work site, depending on the motor noise or the off-state of the power lamp. There was no choice, and in the case of work with a small number of people, there was a problem of not being able to prepare for a power cut, such as situations where the situation was not immediately recognized.

Republic of Korea Patent Publication No. 10-2011-0072614 Republic of Korea Patent Registration No. 10-1242608 Republic of Korea Patent Registration No. 10-2012185

The present invention was devised to solve the above-mentioned problems, and is intended to provide an electric blower for a respiratory device that can purify external air and supply it to a respiratory protection device worn by a user.

In particular, the purpose is to provide an electric blower for a respiratory device that can check the power connection status connected to the blower and notify the user of the accidental power cut with an alarm.

At this time, an electric blower for a breathing apparatus is provided that can immediately notify the user of a power-off state by operating an alarm sound and an alarm light simultaneously to notify the user as an alarm.

In addition, even if the power is cut off, the power cut notification system operates normally by the auxiliary power source, and the purpose is to provide an electric blower for a breathing apparatus that can temporarily maintain air supply through emergency power supply.

Meanwhile, the present invention provides an electric blower for a breathing device that can simply fix the power cord for supplying power to the outside of the device and prevent noise due to vibration at the part where the power cord is fixed. It is for.

In addition, the object is to provide an electric blower for a breathing device that has a housing structure that is simply detachable so that the filter can be easily replaced, and that can prevent the shape of the filter from being deformed.

The electric blower for a breathing apparatus of the present invention for achieving the above-mentioned purpose is a case in which openings are formed on both sides and a blowing fan for sucking in and discharging air is installed inside, and is connected to an opening on one side of the case and sucks in air from the outside. A housing including a first cover formed with an intake port and a second cover connected to an opening on the other side of the case and formed with an exhaust port through which air moved by the blowing fan is formed, installed on the housing and electrically connected to the blowing fan to operate the blowing fan. It includes a controller for controlling, and at least one filter installed in the housing, and the controller includes a power cutoff notification system that generates an alarm according to a cutoff state of supplied power.

In addition, the power cut notification system is connected to the regular power supply unit that supplies power to the controller, the auxiliary power supply unit installed in the controller, the regular power supply unit, and the auxiliary power supply unit, and detects the rated voltage of the regular power supply unit and the auxiliary power supply unit. A voltage detection unit, a voltage comparison unit that is connected to the voltage detection unit and compares the voltage difference between the regular power supply and auxiliary power supply detected by the voltage detection unit, and a voltage comparison unit that is connected to the voltage comparison unit to generate a signal according to the comparison result of the voltage comparison unit. It includes a switching unit and an alarm unit connected to the switching unit and operated by an input signal.

In addition, the alarm unit is composed of a sounder or a lamp to warn the user of the power-off state of the controller through at least one of an alarm sound or an alarm light.

In addition, the auxiliary power supply unit is composed of either a rechargeable battery installed to be rechargeable by the constant power supply unit or a battery replaceably installed in the controller.

In addition, the controller is provided with a power cord that is connected to the power port and extends to the outside, and further includes a clamp that restrains the power cord to the housing and detachably fixes it to the housing. The clamp is attached to a fitting hole formed on the outer surface of the housing. It includes a plurality of inserted clip members and a band member connected to the plurality of clip members to elastically support the power cord.

Additionally, the fitting hole of the housing may be provided with a sealing member that maintains airtightness with the clip member of the clamp. The sealing member includes a hollow barrel portion that is inserted into the fitting hole and through which the clip member penetrates, a guide portion that extends radially from the top of the barrel portion to guide the entry of the clip member, and an outer portion of the top and bottom of the barrel portion. Each includes a flange portion that is formed to protrude and prevent the barrel portion from being separated.

In addition, the filter includes a first filter installed on the first cover to filter air flowing in through the intake port, and a second filter installed on the second cover to filter air directed to the exhaust port by the blowing fan. , the first filter is fixed to the first cover and includes a spacer installed inside the first filter so that a pair of wires cross each other to maintain the first filters spaced apart.

As described above, the present invention purifies external air and allows breathing air to be supplied to the respiratory protective equipment worn by the user.

In particular, by checking the connection status of the power source connected for power supply, an alarm can be notified to the user in the event of an accidental power cut, allowing the user at work to quickly evacuate or perform power recovery work, and reducing the risk caused by power cutoff. Exposure can be minimized. At this time, the alarm sound and the alarm light are activated at the same time so that the user can immediately recognize the power cut state, thereby encouraging rapid evacuation and recovery work.

In addition, even if the main power is cut off, the power cut notification system can operate normally thanks to the auxiliary power supply that can be charged through the constant power supply, and the air supply can be temporarily maintained through the emergency power supply, ensuring safety in use. You can.

Meanwhile, the power cord for supplying power can be fixed to the outside of the blower with a simple structure, and vibration or noise can be prevented from occurring at the joint of the fixing clip that secures the power cord.

In addition, the housing structure is simple to separate and combine with hinges and clamps, making it easy to replace the filter. A spacer is provided to separate the bag-shaped filters to allow ventilation, so the filters can be spaced at a set distance using the spacer. It is advantageous to miniaturize the product by reducing the step when combining the filter with the housing.

1 is a perspective view showing an electric blower for a breathing apparatus according to an embodiment of the present invention;
Figure 2 is an exploded perspective view of the electric blower for the breathing apparatus of Figure 1;
Figure 3 is a side view of the electric blower for the breathing apparatus of Figure 1;
Figure 4 is a cross-sectional view taken along line CC' of Figure 3;
Figure 5 is a perspective view showing a state in which the power cord is connected to and stored in the electric blower for a breathing apparatus of Figure 1;
Figure 6 is a cross-sectional view taken along line DD' in Figure 4; and
Figure 7 is a block diagram of a power cut notification system for an electric blower for a breathing apparatus according to an embodiment of the present invention.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms.

Hereinafter, the technical features of the present invention will be described in detail with reference to the attached drawings.

1 to 7, the electric blower for a breathing device according to an embodiment of the present invention may include a housing 100, a controller 200, and a filter 300, and the controller 200 is configured to turn off the power. Includes notification system.

The housing 100 may be configured as a box-shaped enclosure extending in the longitudinal direction, as shown in FIG. 1. The housing 100 may be provided with a handle 101 on the upper side that can be held by the user for easy carrying. This housing 100 includes a case 110, a first cover 120, and a second cover 130.

Case 110 is composed of a hollow member with openings formed on both sides, as shown in FIGS. 1 and 2. A first cover 120 and a second cover 130 are respectively coupled to the openings on both sides of the case 110. The case 110 is provided with a hinge 111 on the lower side so that the first cover 120 and the second cover 130 can be rotatably operated with respect to each opening side, and a clamp 112 is provided on the upper side. Separate and fix the first cover 120 and the second cover 130. The separable structure of the case 110, the first cover 120, and the second cover 130 facilitates replacement of the filter 300, which will be described later.

And, the case 110 has a blowing fan (F) coupled thereto. The blowing fan (F) may be composed of a flow through type fan motor that blows air from the rear side to the front side, and the fan is rotated by the motor to move the air. That is, the blowing fan (F) sucks air from one side of the case 110 and discharges the air from the other side.

Additionally, the first cover 120 is connected to the opening formed on one side of the case 110, as shown in FIGS. 1 to 3. The first cover 120 may have an intake port 121 formed on one side through which air is sucked in from the outside. That is, the first cover 120 allows air to flow in through the intake port 121 when the blowing fan (F) installed in the case 110 is operated, and the introduced air is provided to the case 110.

And, as shown in FIGS. 1 to 3, the second cover 130 is connected to the opening formed on the other side of the case 110. An exhaust port 131 through which air is discharged to the outside may be formed in the second cover 130. That is, when the blowing fan (F) is operated, the air moved by the blowing fan (F) is discharged through the exhaust port 131.

Here, the exhaust port 131 of the second cover 130 is a connector-shaped port to which an external air hose (not shown) is connected, and may be provided in plural numbers. For example, as shown as an example in FIG. 3, four users can It consists of four exhaust ports 131 that can be used simultaneously and can be placed at the end of the second cover 130, that is, on the plate 202 of the controller 200, which will be described later. An air hose is connected to each exhaust port 131 to provide air. This air hose is connected to an air inlet provided in a mask, hood, helmet, or protective suit worn by the user to provide direct breathing air to the user.

The controller 200 is installed on the second cover 130 as shown in FIGS. 2 to 4. This controller 200 may be electrically connected to the blowing fan (F) and controls the blowing fan (F).

At this time, the controller 200 includes a circuit board 201 on which various circuits and sensors are mounted, as shown, and a plate-shaped plate 202 as an operation panel for fixing the circuit board 201 to the second cover 130. It can be included. The circuit board 201 may be fixed to the rear of the plate 202 and positioned inside the second cover 130, and the front of the plate 202 may be electrically connected to the circuit board 201 to operate the blower. A power switch 203, a control button 204, and a power port 205 for power supply may be provided to be exposed to the outside of the electric blower for a breathing apparatus. Additionally, an exhaust port constituting the exhaust port 131 of the second cover 130 is provided on the plate 202 adjacent to the above-described configurations.

Filter 300 is installed in housing 100 as shown in FIGS. 2 and 4. At this time, the filter 300 may be composed of a pair of filters 300 each installed on the first cover 120 through which air flows in and the second cover 130 through which air is discharged.

The first filter 310 may be composed of a pre-filter made of fabric to remove foreign substances introduced with external air. For example, the first filter 310 may be formed in a cylindrical shape with one side open, as shown in FIGS. 2 and 4, and the closed bottom side may be disposed adjacent to the intake port 121 of the first cover 120. , can be fixed to the first cover 120 by the filter spacer 311.

The filter spacer 311 is a fixture for fixing the first filter 310 to the housing 100. A pair of wire structures that intersect each other are spaced apart at a predetermined distance inside the cylindrical shape of the first filter 310. As it is arranged so that the first filter 310 can be supported on the inside while being spaced apart to allow ventilation. Accordingly, the filter spacer 311 separates the first filter 311 from the blowing fan (F) or the intake port 121 at a set distance. Additionally, the filter spacer 311 can prevent deformation of the first filter 310 when air is sucked. This filter spacer 311 is interposed between the case 110 and the first cover 120 in a state in which the first filter 310 is inserted and coupled to the housing 100 through a fastening or clip action. Accordingly, the filter spacer 311 minimizes the level difference between the case 110 and the first cover 120.

The second filter 320 may be configured as a HEPA filter to filter out fine particles contained in the air, and is disposed adjacent to the opening of the case 110 and fixed to the second cover 130.

In the electric blower for a breathing apparatus configured as described above, when the blowing fan (F) is operated, external air is sucked in through the intake port 121 provided on one side, and the air is discharged through the exhaust port 131 provided on the other side. Here, the controller 200 that controls the blowing fan (F) generates heat due to the nature of the power supply, but as it is installed on the second cover 130 located in the air discharge path, the air discharged through the blowing fan (F) It can be cooled by .

In addition, the electric blower for the breathing apparatus discharges purified air through the filter 300 and supplies air to the user through a separate air hose (not shown) connected to the exhaust port 131. That is, the electric blower for a breathing device primarily purifies the incoming air by passing it through the first filter 310, and secondarily purifies the discharged air by passing it through the second filter 320.

Therefore, the electric blower for a breathing device purifies the external air and supplies it to the mask, hood, helmet, or protective clothing worn by the user, thereby providing clean air to the user.

Meanwhile, referring to FIG. 5, the controller 200 may include a power cord 206 for receiving power as shown. The power cord 206 is connected to the power port 205 provided on the plate 202 of the controller 200 and extends to the outside.

Here, the electric blower for a breathing device according to an embodiment of the present invention may include a clamp 400 as shown in FIGS. 5 and 6. The clamp 400 is used to secure the power cord 206 connected to the controller 200 to one surface of the housing 100, and includes a clip member 410 and an elastic band member 420.

To elaborate, the clip member 410 is inserted into the fitting hole 102 formed on the outer surface of the housing 100 and coupled to the housing 100, as shown. At this time, the clip member 410 may be provided as a pair of members respectively coupled to the upper and lower sides of one surface of the housing 100.

The band member 420 is coupled to the clip member 410 to secure the power cord 206 to the housing 100. To this end, the band member 420 may be composed of an elastic band, and elastically supports the outer surface of the power cord 206 to bring the power cord 206 into close contact with the housing 100.

In addition, the electric blower for a breathing device according to an embodiment of the present invention may include a sealing member 430 installed in the fitting hole 102 of the housing 100, as shown in FIG. 6.

The sealing member 430 is made of rubber packing, etc. and can be fixed to the fitting hole 102, and maintains airtightness with the clip member 410 inserted into the fitting hole 102. This sealing member 430 is inserted into the fitting hole 102 and includes a hollow barrel portion 431 through which the clip member 410 penetrates, and a guide portion 432 extending radially from the top of the barrel portion 431. , and a flange portion 433 that protrudes from the outside of the top or bottom of the barrel portion 431.

The barrel portion 431 may be formed with an inner diameter length smaller than the outer diameter length of the clip member 410, and is in close contact with the surface of the clip member 410 and the surface of the fitting hole 102 when the clip member 410 enters. Thus, the clip member 410 is stably supported in the fitting hole 102 and an airtight state is maintained.

The guide portion 432 may be formed to expand in a disk shape from the upper diameter of the barrel portion 431 outward, and is a guide so that it can be easily inserted into the hollow of the barrel portion 431 when the clip member 410 enters. Form a path that

The flange portion 433 may be provided at the top or bottom of the barrel portion 431. For example, as shown in FIG. 6, the flange portion 433 may be formed to protrude in a flange shape from each of the top and bottom of the barrel portion 431. These flange portions 433 are installed to contact the inner and outer surfaces of the housing 100, respectively, and are supported in mutual directions by each flange.

Accordingly, the sealing member 430 blocks vibration generated between the clip member 410 and the housing 100 to minimize noise generation. Additionally, the sealing member 430 can easily guide the clip member 410 to be coupled by the guide portion 432.

In addition, the sealing member 430 is in close contact with the flange portion 433 and can be stably maintained in a fixed state to the housing 100, and is not separated from the housing 100 when the clip member 410 is separated or combined. is prevented. In addition, the sealing member 430 can increase the airtightness as a part of the guide portion 432 or the flange portion 433 is pushed into the fitting hole 102 when the clip member 410 enters. In addition, the sealing member 430 blocks vibration generated between the housing 100 and the clip member 410 when vibration is transmitted by the blowing fan (F), thereby minimizing the generation of noise.

On the other hand, the electric blower for a breathing apparatus according to an embodiment of the present invention may be provided with a power cut notification system to notify the user of the power cut state when the power is cut off.

To this end, as shown in FIG. 7, the controller 200 includes a fan control unit 210, a constant power supply unit 220, an auxiliary power supply unit 230, a voltage detection unit 240, a voltage comparator 250, It may include a switching unit 260 and an alarm unit 270. These configurations may be provided on the circuit board 201 of the controller 200.

The fan control unit 210 is for controlling the operation of the blowing fan (F) by signals input from various switches or buttons of the controller 200. This fan control unit 210 is supplied with power by a constant power supply unit 220, which will be described later. Meanwhile, the fan control unit 210 may be temporarily supplied with power by the auxiliary power supply unit 230, which will be described later, depending on the power cutoff state detected by the voltage detection unit 240 and the voltage comparison unit 250.

The constant power supply unit 220 is for supplying power to the controller 200, and connects an external power supply with a high voltage of 220V or 110V supplied by the power cord 206 to the blower's operating voltage (e.g., 12V or 24V direct current). ) consists of a circuit structure for output. The constant power supply unit 220 uses components such as a transformer, a bridge circuit, and a regulator to lower the applied voltage, convert it to direct current, and output it as a use voltage.

The auxiliary power supply unit 230 is installed in the controller 200 and is used to supply power to the power cut notification system when power is cut off. At this time, the auxiliary power supply unit 230 is prepared in a standby state when power is normally supplied by the constant power supply unit 220, and when an accidental power cut is detected, it can be used to supply power to the power cut notification system. . Meanwhile, if the auxiliary power supply unit 230 has a large capacity, it may be used to temporarily operate the blower fan (F). This auxiliary power supply unit 230 may be composed of a commonly used battery, and it is preferable that it be composed of a rechargeable battery and be charged by the constant power supply unit 220 to maintain battery capacity.

Here, the efficiency of the auxiliary power supply unit 230 may be reduced due to the continuous charging state and repetitive charging and discharging due to the characteristics of the battery, so the power may be selectively connected by the charging control unit 280 provided in the controller 200. . The charging control unit 280 maintains the remaining battery capacity by starting charging when the value is below the minimum setting value for the auxiliary power supply unit 230 and stopping charging when it is above the maximum setting value, and inputs power by the constant power supply unit 220. can be controlled as needed.

The voltage detection unit 240 is connected to the regular power supply unit 220 and the auxiliary power supply unit 230, respectively, and detects the rated voltages of the regular power supply unit 220 and the auxiliary power supply unit 230. The voltage detection unit 240 determines the voltage state of the currently input power and detects the voltage of the regular power supply unit 220 and the auxiliary power supply unit 230 by checking the highest or lowest voltage value.

The voltage comparison unit 250 is connected to the voltage detection unit 240 and compares the voltage difference between the regular power supply unit 220 and the auxiliary power supply unit 230 detected by the voltage detection unit 240. The voltage comparison unit 250 compares whether the detected voltage value is a value from the regular power supply unit 220 or a value from the auxiliary power supply unit 230, and determines whether power is cut off through the voltage difference between them. At this time, even if the power of the regular power supply unit 220 is cut off, power supply by the auxiliary power supply unit 230 continues, so the power cut status can be confirmed and provided to the switching unit 260.

When normal power supply by the constant power supply unit 220 is confirmed in the voltage detection unit 240 and the voltage comparison unit 250, the switching unit ensures that power is supplied by the regular power supply unit 220 to the fan control unit 210. Signal generation for 260 is limited, and when power supply interruption by the constant power supply unit 220 is confirmed, signal generation for the switching unit 260 is permitted.

The switching unit 260 generates an operation signal for the alarm unit 270, which will be described later, according to the comparison result of the voltage comparator 250.

The alarm unit 270 is operated by a signal input from the switching unit 260, and outputs the power-off state in the form of an alarm sound or alarm. The alarm unit 270 may be composed of a sound device 271 such as a speaker that generates sound, or may be composed of a lamp 272 that displays with light.

Under normal circumstances, the controller 200 configured in this way checks the voltage difference between the regular power supply unit 220 and the auxiliary power supply unit 230 and uses high voltage power. Since the voltage of the regular power supply unit 220 is usually higher than that of the auxiliary power supply unit 230, power is supplied by the regular power supply unit 220. Accordingly, power is always input to the auxiliary power supply unit 230, but in normal situations, power use is cut off to prevent battery capacity from easily deteriorating.

Additionally, the controller 200 can always check the power status input by the voltage detection unit 240 and the voltage comparator 250. At this time, if the power cord 206 is disconnected due to external factors during use, or the power is completely cut off due to a power outage or cutting of the power cord 206, the power cut state is detected and an alert is sent to the user for power recovery. will be provided. That is, when the power is cut off, the controller 200 detects the input voltage value from the constant power supply unit 220 through the voltage detection unit 240, and compares the voltage difference in the voltage comparator 250 to provide assistance. The power cut-off state can be confirmed through the higher voltage value of the power supply unit 230, which generates a signal of the switching unit 260. Accordingly, the alarm is activated by the alarm unit 270 to notify the user of the power cut-off status through an alarm sound and an alarm light. In this way, the power is automatically switched by the power cut notification system and the alarm is activated.

On the other hand, the controller 200 activates the alarm by the voltage difference between the regular power supply unit 220 and the auxiliary power supply unit 230, and turns off the power when the power is intentionally turned off by the user rather than accidentally. Notifications should not work. To distinguish this, a two-pole power switch is used on the power switch 203 so that power is supplied directly to the controller 200 by the constant power supply unit 220 only when the power switch is ON, and when the power switch is OFF, the power is physically supplied. You can prevent the power-off notification system from operating by disconnecting. At this time, the auxiliary power supply unit 230 is also turned off in the same way as the regular power supply unit 220, thereby preventing unnecessary power consumption.

The electric blower for a breathing apparatus according to the above-described embodiment of the present invention can purify external air and supply breathing air to a respiratory protection device worn by the user.

In particular, by checking the connection status of the power source connected for power supply, an alarm can be notified to the user in the event of an accidental power cut, allowing the user at work to quickly evacuate or perform power recovery work, and reducing the risk caused by power cutoff. Exposure can be minimized. At this time, the alarm sound and the alarm light are activated at the same time so that the user can immediately recognize the power cut state, thereby encouraging rapid evacuation and recovery work.

And, even if the main power is cut off, the power cut notification system can operate normally by the auxiliary power supply unit 230 that can be charged through the constant power supply unit 220. At this time, if the auxiliary power supply unit 230 has a large capacity, it can also be used for emergency power supply, and through this, air supply can be temporarily maintained, thereby ensuring safety in use.

Meanwhile, the power cord 206 for supplying power can be fixed to the outside of the electric blower for a breathing device with a simple structure, and vibration occurs at the joint area of the fixing clip that secures the power cord 206 by the sealing member. Noise generation can be prevented by blocking the connection, and external air can be prevented from entering the joint area.

In addition, the connection structure of the housing 100, which is easily separated and coupled with hinges and clamps, makes it easy to replace the filter 300, and the spacer 311 that separates the bag-shaped first filter 300 to allow ventilation is provided. It is provided so that the first filter 310 can be spaced at a set distance by the spacer 311, and when the filter is coupled to the housing 100, the step between the case 110 and the first cover 120 is reduced to produce a product. It is advantageous for miniaturization.

The above description is merely an illustrative explanation of the technical idea of the present invention, and those skilled in the art will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are for illustrative purposes rather than limiting the technical idea of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

100: Housing 101: Handle
102: Fitting hole 110: Case
111: hinge 112: clamp
120: first cover 121: intake port
130: second cover 131: exhaust port
200: Controller 201: Circuit board
202: plate 203: power switch
204: control button 205: power port
206: power cord 210: fan control unit
220: constant power supply unit 230: auxiliary power supply unit
240: voltage detection unit 250: voltage comparison unit
260: switching unit 270: alarm unit
280: Charging control unit 300: Filter
310: first filter 311: filter fixture
320: second filter 400: clamp
410: Clip member 420: Elastic band member
430: Sealing member 431: Barrel portion
432: Guide part 433: Flange part
F: Circulating fan

Claims (6)

A hollow housing with intake and exhaust ports formed on both sides and a blowing fan installed inside to suck in and expel air;
a controller installed in the housing and electrically connected to the blowing fan to control the blowing fan; and
At least one filter installed in the housing,
The controller is,
It includes a power cutoff notification system that generates an alarm depending on the cutoff state of power supplied to the controller,
The power cut notification system is,
A constant power supply unit that supplies power to the controller;
An auxiliary power supply unit installed in the controller;
a voltage detection unit connected to the regular power supply unit and the auxiliary power supply unit, respectively, to detect the rated voltage of the regular power supply unit and the auxiliary power supply unit;
a voltage comparison unit connected to the voltage detection unit and comparing a voltage difference between the regular power supply unit and the auxiliary power supply unit detected by the voltage detection unit;
a switching unit connected to the voltage comparator to generate a signal according to a comparison result of the voltage comparator and to switch power supplied to the controller from the regular power supply unit to the auxiliary power supply unit according to the signal; and
An alarm unit connected to the switching unit, operated by the signal input, and driven by power from the auxiliary power supply unit,
The controller is,
The breathing device further includes a power switch that is operated by the user to physically supply or cut off the power connection of the constant power supply unit, and prevents operation of the power cut notification system when the power switch is in an off state. For electric blower. According to paragraph 1,
The controller is equipped with a power cord connected to the power port and extending externally,
It further includes a clamp that restrains the power cord to the housing and detachably fixes it to the housing,
The clamp is,
a plurality of clip members inserted into fitting holes formed on the outer surface of the housing; and
An electric blower for a breathing apparatus including a band member connected to the plurality of clip members to elastically support the power cord. The method of claim 2, wherein the clamp is:
Further comprising a sealing member installed to maintain airtightness between the clip member and the fitting hole,
The sealing member is,
a hollow barrel portion inserted into the fitting hole and through which the clip member passes;
a guide portion extending radially from the top of the barrel portion; and
An electric blower for a breathing device including a flange portion protruding from the outside of the top or bottom of the barrel portion. According to paragraph 2,
The alarm unit,
An electric blower for a breathing apparatus consisting of a sounder or a lamp to warn the user of the power-off state of the controller by at least one of an alarm sound or an alarm light. The method of claim 2, wherein the auxiliary power supply unit,
An electric blower for a breathing device consisting of either a rechargeable battery installed to be rechargeable by the constant power supply unit or a battery replaceably installed in the controller. The method of claim 2, wherein the filter:
a first filter installed in the intake port to filter air flowing into the interior through the intake port; and
It includes a second filter installed in the exhaust port to filter air directed to the exhaust port by the blowing fan,
The first filter is,
A spacer fixed to the inside of the housing and provided with a pair of wires crossing the inside of the first filter to maintain the first filter in a spaced apart state.

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