KR20230099945A - Gas alarm device - Google Patents

Abstract

The present invention relates to a gas alarm device, wherein a control unit generates a low voltage warning notification when the voltage level of a power supply voltage transmitted from a power source is lower than the voltage level of a low voltage determination reference voltage, and a control unit for generating a low voltage warning notification, and When the voltage level is lower than the voltage level of the low voltage determination reference voltage, a malfunction prevention unit may be included to increase the voltage level of the power supply voltage higher than the voltage level of the low voltage determination reference voltage.

Description

Gas alarm device {GAS ALARM DEVICE}

The present invention relates to a gas alarm device.

In general, a gas alarm device that detects carbon monoxide is installed when a boiler is installed, and gas alarm devices can be divided into products that use battery power, products that use DC power, and products that use AC power depending on the type of power source. there is. Among them, products that use battery power are mainly used because of the convenience of installation.

Since the normal operation of the gas alarm device is directly related to the life of the boiler user, the gas alarm device must always perform a normal operation.

Accordingly, the gas alarm device is designed to provide a warning alarm to a user through a speaker or a display when the voltage of the power supply becomes too low to perform a normal operation.

However, since the gas alarm device is designed to give a warning notification when the voltage of the power source is lowered, a warning alarm is generated when the voltage level of the power source slowly increases upon initial operation after the gas alarm device is installed.

In particular, in gas alarm devices using battery power, the voltage level of the battery power starts at a voltage level below the reference value and slowly returns to the target voltage at the time of the first operation of the gas alarm device, depending on the performance of the battery and the initial storage condition. may occur, and in this case, a problem of generating a warning notification may occur.

Therefore, in the case of a gas alarm device using a battery (particularly, a lithium battery) as a power source, there is a high probability of malfunction in which a warning alarm may occur when the gas alarm device first operates.

An embodiment of the present invention is to provide a gas alarm device capable of preventing a low voltage warning alarm that may occur during the first operation of the gas alarm device.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

Gas alarm device according to an embodiment of the present invention, when the voltage level of the power supply voltage transmitted from the power source is lower than the voltage level of the low voltage determination reference voltage, a control unit for generating a low voltage warning notification, and the power supply during the enable period of the initial pulse When the voltage level of the voltage is lower than the voltage level of the low voltage determination reference voltage, a malfunction prevention unit may be included to increase the voltage level of the power supply voltage higher than the voltage level of the low voltage determination reference voltage.

In one embodiment, the initial pulse may be enabled in a booting section of a gas alarm device.

In an embodiment, the control unit may generate the initial pulse that is enabled for a predetermined time from a time point when the power voltage is first transmitted from the power source.

In one embodiment, the malfunction preventing unit may include an operating voltage generating unit generating an operating voltage during an enable period of the initial pulse, a reference voltage generating unit dividing the operating voltage to generate the low voltage determination reference voltage, the A comparator that compares the power supply voltage with the voltage level of the low voltage determination reference voltage to generate a comparison result signal, and a voltage boosting unit that raises the voltage level of the power supply voltage higher than the voltage level of the low voltage determination reference voltage based on the comparison result signal. can include

In one embodiment, the comparison unit enables the comparison result signal when the voltage level of the power supply voltage is lower than the voltage level of the low voltage determination reference voltage, and the voltage level of the power supply voltage is lower than the voltage level of the low voltage determination reference voltage. When higher than the voltage level, the comparison result signal may be disabled.

In an embodiment, the voltage boosting unit may apply the power voltage to one end of a fifth resistor element when the comparison result signal is enabled.

In one embodiment, the voltage boosting unit receives the comparison result signal through a gate, applies the power supply voltage to a drain, and has a source connected to a third transistor having one end of the fifth resistor element and one end of the third transistor connected thereto. It may include the fifth resistance element to which the sources of the three transistors are connected and the ground terminal is connected to the other end.

In one embodiment, a voltage generator receiving the power supply voltage to generate a rated voltage and a gas detection sensor receiving the rated voltage to sense the concentration of the target gas and providing concentration information to the control unit may further include. there is.

In one embodiment, the control unit may generate a warning notification when the concentration of the target gas is greater than or equal to a predetermined concentration according to the concentration information.

In one embodiment, the power source may include a battery.

A gas alarm device according to another embodiment of the present invention includes a power supply for providing a power supply voltage, a switch for electrically connecting or disconnecting the power supply and the voltage generator, and voltage levels of the power supply voltage and the low voltage determination reference voltage transmitted from the switch. A controller that generates a low voltage warning notification by comparing and generating a warning notification when the concentration of the target gas according to the concentration information is higher than a preset concentration, receiving a rated voltage from the voltage generator and detecting the concentration of the target gas The voltage level of the power voltage for a predetermined time from the time when the power voltage is first transmitted from the gas detection sensor and the switch that generates the concentration information and provides the generated concentration information to the control unit is the low voltage determination reference voltage. A malfunction prevention unit may be included to increase the voltage level of the power supply voltage higher than the voltage level of the low voltage determination reference voltage when the voltage level is lower than the voltage level of the voltage level.

In one embodiment, the malfunction preventing unit may include an operating voltage generating unit generating an operating voltage for a predetermined time from a time when the power supply voltage is initially delivered, and a reference voltage receiving the operating voltage and generating the low voltage determination reference voltage. A generator, a comparator for comparing the power supply voltage with the voltage level of the low voltage determination reference voltage, and a fifth resistance element based on an output of the comparator indicating that the voltage level of the power supply voltage is lower than the voltage level of the low voltage determination reference voltage It may include a voltage boosting unit for applying the power supply voltage to one end of.

The present technology has an advantage of improving the reliability of the warning notification of the gas alarm device by preventing the initial low voltage warning notification of the gas alarm device.

In addition to this, various effects identified directly or indirectly through this document may be provided.

1 is a diagram showing the configuration of a gas alarm device according to an embodiment of the present invention.
2 is a diagram showing the configuration of a malfunction prevention unit among configurations of a gas alarm device according to an embodiment of the present invention.
Figure 3 is a graph for explaining the operation of the gas alarm device according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. In addition, unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3 .

1 is a diagram showing the configuration of a gas alarm device according to an embodiment of the present invention.

Referring to FIG. 1 , a gas alarm device 100 according to an embodiment of the present invention includes a power source 10, a switch 20, a voltage generator 30, a gas detection sensor 40, and a malfunction prevention unit 50. ) and a control unit 60.

The power source 10 is a component that supplies electrical energy to the gas alarm device 100, and may include, for example, a battery.

The switch 20 may electrically connect or disconnect the power source 10, the voltage generator 30, the malfunction prevention unit 50, and the control unit 60.

For example, the switch 20 is turned off before the gas alarm device 100 is installed, and the power source 10, the voltage generator 30, the malfunction prevention unit 50, and the control unit 60 are electrically can be separated by

Meanwhile, when the switch 20 is turned on after the gas alarm device 100 is installed, the power source 10, the voltage generator 30, the malfunction preventing unit 50, and the control unit 60 are electrically connected. can

The voltage generator 30, the malfunction prevention unit 50, and the control unit 60 electrically connected to the power source 10 may receive electrical energy provided from the power source 10 by the switch 20.

At this time, the electrical energy may include current and voltage, and will be described as voltage in the following description.

The voltage generator 30 may receive the power voltage VB provided from the power source 10 through the switch 20 .

The voltage generator 30 may generate the rated voltage VCC by receiving the power supply voltage VB, and the generated rated voltage VCC may be provided to the gas detection sensor 40 .

In this case, the voltage level of the rated voltage VCC may be a voltage level at which the gas detection sensor 40 can normally detect gas.

The gas detection sensor 40 operates by receiving the rated voltage VCC, detects the target gas, and provides concentration information D_g of the target gas to the control unit 60 .

The malfunction prevention unit 50 may receive the power voltage VB provided from the power source 10 through the switch 20 and receive the rated voltage VCC generated from the voltage generator 30. , the initial pulse P_s may be provided from the control unit 60.

The malfunction preventing unit 50 may increase the voltage level of the power voltage VB by comparing the voltage levels of the power voltage VB and the rated voltage VCC during the enable period of the initial pulse P_s.

For example, the malfunction prevention unit 50 may divide the rated voltage VCC during the enable period of the initial pulse P_s to generate the low voltage determination reference voltage VRF (shown in FIG. 2), and the power supply voltage The voltage level of the power supply voltage VB may be increased by comparing the voltage level of VB and the low voltage determination reference voltage VRF.

More specifically, when the voltage level of the power supply voltage VB is lower than the voltage level of the low voltage determination reference voltage VRF, the malfunction prevention unit 50 converts the voltage level of the power supply voltage VB to the low voltage determination reference voltage VRF. can be higher than the voltage level of

The controller 60 may receive the power voltage VB provided from the power source 10 through the switch 20 .

The control unit 60 may provide a warning notification based on the voltage level of the power voltage VB and the concentration information D_g.

For example, the control unit 60 may provide a warning notification when the voltage level of the power supply voltage VB is lower than the preset voltage level. In addition, the controller 60 may provide a warning notification when the concentration of the target gas according to the concentration information D_g is higher than a preset concentration.

In this case, the preset voltage level may be a voltage level corresponding to the low voltage determination reference voltage (VRF), and a warning notification may be provided to a speaker (SPEAKER) and an LED to deliver auditory and visual information to the user.

When the power voltage VB is first supplied from the power source 10 through the switch 20, the control unit 60 generates an initial pulse P_s that is enabled for a predetermined time, and generates an initial pulse P_s. It can be provided to the malfunction prevention unit 50.

Referring to FIG. 1 , a gas alarm device according to an embodiment of the present invention includes a power source 10, a switch 20, a voltage generator 30, a gas detection sensor 40, a malfunction prevention unit 50, and a control unit. Although shown and described to include 60, switch 20 may be removed depending on the embodiment.

Therefore, the control unit 60 is enabled at the time when the power supply voltage VB output from the power supply 10 is first applied to the control unit 60 (the first time), and is enabled for a preset period of time (P_s). ) can be created.

2 is a diagram showing the configuration of a malfunction prevention unit among configurations of a gas alarm device according to an embodiment of the present invention.

Referring to FIG. 2 , the malfunction prevention unit 50 may include an operating voltage generator 51 , a reference voltage generator 52 , a comparator COM, and a voltage boosting unit 53 .

The operating voltage generator 51 may generate the operating voltage V_on based on the rated voltage VCC during the enable period of the initial pulse P_s.

For example, the operating voltage generator 51 may generate the operating voltage V_on during the enable period of the initial pulse P_s, and generate the operating voltage V_on when the initial pulse P_s is disabled. can be stopped

At this time, the initial pulse P_s is applied for a predetermined time from the point at which the power voltage VB starts to be applied to the voltage generator 30, the control unit 60, and the malfunction prevention unit 50 through the switch 20. can be enabled

For example, when the power voltage VB is first applied to the control unit 60 from the power source 10 through the switch 20, the control unit 60 detects the initially applied power voltage VB for a predetermined time ( For example, an initial pulse P_s enabled for 5 seconds) may be generated.

The operating voltage generator 51 generates the operating voltage V_on during the enable period (eg, 5 seconds) of the initial pulse P_s, and supplies the generated operating voltage V_on to the comparator COM. can provide

The operating voltage generator 51 is a circuit designed to prevent rapid discharge of the power source 10, in particular, the power source 10 using a battery, and generates an operating voltage in the case of a product (gas alarm device) unrelated to the rapid discharge of the battery. Part 51 may be omitted.

The operating voltage generator 51 may include a first transistor Tr1, a second transistor Tr2, a first resistor element R1 and a second resistor element R2.

The gate of the first transistor Tr1 may receive the initial pulse P_s, the drain may be connected to the other terminal of the first resistor element R1, and the source may be connected to the ground terminal.

One end of the first resistor element R1 may be connected to the other end of the second resistor element R2, and the drain of the first transistor Tr1 may be connected to the other end.

The second resistor element R2 may receive the rated voltage VCC at one end and one end of the first resistor element R1 may be connected to the other end.

In the second transistor Tr2, a node to which one end of the first resistor element R1 and the other end of the second resistor element R2 are connected is connected to a gate, and one end of the second resistor element R2 is connected to a source, An operating voltage (V_on) may be output from the drain.

At this time, the operating voltage V_on output from the drain of the second transistor Tr2 may be provided to the reference voltage generator 52 and the comparator COM connected to the drain of the second transistor Tr2.

The operating voltage generator 51 configured as described above may operate as follows.

During the enable period of the initial pulse P_s, the first transistor Tr1 is turned on, and one end of the first resistance element R1 and the second resistance element R2 are connected during the period when the first transistor Tr1 is turned on. The voltage level of the node may be lowered.

When the voltage level of the node where one end of the first resistor element R1 and the other end of the second resistor element R2 are connected is lowered and the second transistor Tr2 is turned on, the rated voltage applied to the source of the second transistor Tr2 (VCC) may be output to the drain of the second transistor Tr2. At this time, the voltage output from the drain of the second transistor Tr2 may be provided to the reference voltage generator 52 and the comparator COM as an operating voltage V_on.

As a result, the operating voltage generator 51 may provide the operating voltage V_on to the reference voltage generator 52 and the comparator COM during the enable period of the initial pulse P_s.

The reference voltage generator 52 may receive the operating voltage V_on, generate the low voltage determination reference voltage VRF, and provide the generated low voltage determination reference voltage VRF to the comparator COM.

For example, the reference voltage generator 52 may divide the operating voltage V_on to generate the low voltage determination reference voltage VRF.

The reference voltage generator 52 may include third and fourth resistance elements R3 and R4.

One end of the third resistor element R3 may receive the operating voltage V_on, and one end of the fourth resistor element R4 may be connected to the other end.

The fourth resistance element R4 may have one end connected to the other end of the third resistance element R3 and the other end connected to a ground terminal.

At this time, a low voltage determination reference voltage VRF may be generated at a node where the other end of the third resistor element R3 and one end of the fourth resistor element R4 are connected, and the generated low voltage determination reference voltage VRF is generated by the comparison unit. (COM).

The reference voltage generator 52 configured as described above may generate the low voltage determination reference voltage VRF by voltage dividing the operating voltage V_on by the resistance ratio of the third and fourth resistor elements R3 and R4.

In the comparator COM, the operating voltage V_on is applied to the first voltage terminal, the ground terminal is connected to the second voltage terminal, and the low voltage determination reference voltage VRF is applied to the first input terminal (+). 2 The power supply voltage (VB) can be applied to the input terminal (-).

The comparator COM configured as described above operates by receiving the operating voltage V_on, and compares the voltage levels of the power supply voltage VB and the low voltage determination reference voltage VRF to generate a comparison result signal C_r. .

For example, the comparator COM generates a comparison result signal C_r that is enabled when the voltage level of the power supply voltage VB is lower than the voltage level of the low voltage determination reference voltage VRF, and generates the comparison result signal. (C_r) may be provided to the voltage boosting unit 53.

On the other hand, the comparison unit (COM) generates a comparison result signal (C_r) that is disabled when the voltage level of the power supply voltage (VB) is higher than the level of the low voltage determination reference voltage (VRF), and generates the comparison result signal (C_r) may be provided to the voltage boosting unit 53.

When the comparison result signal C_r is enabled, the voltage boosting unit 53 may increase the voltage level of the power supply voltage VB higher than the voltage level of the low voltage determination reference voltage VRF.

The voltage boosting unit 53 may include a third transistor Tr3 and a fifth resistor element R5.

The third transistor Tr3 receives the comparison result signal C_r through its gate, receives the power supply voltage VBB through its drain, and has one end of the fifth resistor element R5 connected to its source.

The fifth resistor element R5 may have one end connected to the source of the third transistor Tr3 and the other end connected to the ground terminal.

The operation of the voltage boosting unit 53 configured as described above will be described below.

When the comparison result signal C_r is enabled, the third transistor Tr3 is turned on, and the power voltage VB is applied to the fifth resistor element R5 through the turned-on third transistor Tr3.

At this time, the power voltage VB is applied to the fifth resistor element R5, and the voltage level of the power voltage VB may be higher than the voltage level of the low voltage determination reference voltage VRF due to the fifth resistor element R5. there is.

As described above, the malfunction prevention unit 50 determines that the voltage level of the power supply voltage VB is higher than the low voltage determination reference voltage VRF in the enable period of the initial pulse P_s, that is, the booting period of the gas alarm device 100. If the power voltage VB is lower than the low voltage determination reference voltage VRF, it is possible to prevent the low voltage alarm notification from being generated.

In addition, when the enable period of the initial pulse P_s ends and the initial pulse Ps is disabled, that is, when the gas alarm device 100 boots and performs normal operation, the malfunction prevention unit 50 is deactivated Thus, the gas alarm device 100 may generate a low voltage alarm notification when the voltage level of the power supply voltage VB is lower than the low voltage determination reference voltage VRF.

Figure 3 is a graph for explaining the operation of the gas alarm device according to an embodiment of the present invention.

Referring to FIG. 1, the gas alarm device 100 according to an embodiment of the present invention is output from a power source 10 and includes a voltage generator 30, a control unit 60, and a malfunction prevention unit through a switch 20 ( 50) was specified as the power supply voltage (VB).

VB (BAD) shown in FIG. 3 represents the power supply voltage (VB) at a voltage level lower than the voltage level of the low voltage determination reference voltage (VRF) in a state in which the switch 20 is turned off, and VB (Nomal) may mean the voltage level of the normal power supply voltage VB.

In addition, from the time when the gas alarm device 100 is installed and operated for the first time, that is, the time when the switch 20 that was turned off is turned on, the control unit 60 detects the level of the power voltage VB. The section up to (VB LV Detecting) may mean a booting section of the gas alarm device 100.

As shown in (A) of FIG. 3, the power voltage VB transmitted from the power source 10 through the switch 20 gradually increases to a voltage level as the switch 20, which had been turned off, is turned on. this may increase

In this case, the voltage level of the power voltage VB reaches the normal voltage level (Normal) over time, but the controller 60 notifies the low voltage warning before the power voltage (VB) reaches the normal voltage level (Normal). can cause

3(A) may be a graph showing the operation of a general gas alarm device generating an initial low voltage warning notification.

Referring to (B) of FIG. 3 , the control unit 60 generates an initial pulse (P_s) enabled at a high level in the booting period (Booting), and the malfunction prevention unit 50 generates the initial pulse (P_s) During the enable period, when the voltage level of the power voltage VB is lower than the level of the low voltage determination reference voltage VRF, the voltage level of the power voltage VB may be higher than the voltage level of the low voltage determination reference voltage VRF.

Therefore, the control unit 60 detects (VB LV Detecting) the power voltage (VB) higher than the voltage level of the low voltage determination reference voltage (VRF), so that the low voltage warning that may occur during the first operation after installation of the gas alarm device 100 Notifications can be prevented from occurring.

Therefore, the gas alarm device 100 according to an embodiment of the present invention prevents the occurrence of a low voltage warning notification that may occur during the first operation after installation of the gas alarm device 100, thereby preventing the user's gas alarm device 100 from occurring. reliability can be increased.

In addition, since the gas alarm device 100 according to an embodiment of the present invention is configured so that the malfunction prevention unit 50 operates only during the first operation after the gas alarm device 100 is installed, the gas alarm device 50 operates when the first operation period elapses. The device 100 may generate a low voltage warning notification when the power voltage VB is lower than the voltage level of the low voltage determination reference voltage VRF.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (12)

a control unit generating a low voltage warning notification when the voltage level of the power supply voltage transmitted from the power source is lower than the voltage level of the low voltage determination reference voltage; and
a malfunction prevention unit that raises the voltage level of the power supply voltage higher than the voltage level of the low voltage determination reference voltage when the voltage level of the power supply voltage is lower than the voltage level of the low voltage determination reference voltage during an enable period of the initial pulse;
A gas alarm device comprising a.
The method of claim 1,
The initial pulse,
A gas alarm device characterized in that it is enabled in the booting section of the gas alarm device.
The method of claim 1,
The control unit,
The gas alarm device, characterized in that for generating the initial pulse that is enabled for a predetermined time from the time when the power supply voltage is first transmitted from the power source.
The method of claim 1,
The malfunction prevention unit,
an operating voltage generator configured to generate an operating voltage during an enable period of the initial pulse;
a reference voltage generator configured to divide the operating voltage to generate the low voltage determination reference voltage;
a comparator configured to generate a comparison result signal by comparing voltage levels of the power supply voltage and the low voltage determination reference voltage; and
a voltage boosting unit that raises a voltage level of the power supply voltage higher than a voltage level of the low voltage determination reference voltage based on the comparison result signal;
A gas alarm device comprising a.
The method of claim 4,
The comparison unit,
enabling the comparison result signal when the voltage level of the power supply voltage is lower than the voltage level of the low voltage determination reference voltage;
and disabling the comparison result signal when the voltage level of the power supply voltage is higher than the voltage level of the low voltage determination reference voltage.
The method of claim 5,
The voltage boosting unit,
When the signal as a result of the comparison is enabled, the power supply voltage is applied to one end of the fifth resistance element.
The method of claim 6,
The voltage boosting unit,
a third transistor having a gate receiving the comparison result signal, a drain receiving the power supply voltage, and a source connected to one end of the fifth resistor element; and
the fifth resistor element having one end connected to the source of the third transistor and the other end connected to a ground terminal;
A gas alarm device comprising a.
The method of claim 1,
a voltage generator configured to receive the power supply voltage and generate a rated voltage; and
a gas detection sensor receiving the rated voltage, detecting the concentration of the target gas, and providing concentration information to the control unit;
Gas alarm device further comprising a.
The method of claim 8,
The control unit,
A gas alarm device characterized in that generating a warning notification when the concentration of the target gas is greater than or equal to a predetermined concentration according to the concentration information.
The method of claim 1,
The power is
A gas alarm device comprising a battery.
a power source providing power supply voltage;
a switch electrically connecting or disconnecting the power source and the voltage generating unit;
a control unit generating a low voltage warning notification by comparing the voltage level of the power supply voltage transferred from the switch with a low voltage determination reference voltage, and generating a warning notification when the concentration of the target gas according to the concentration information is higher than a preset concentration;
a gas detection sensor configured to receive a rated voltage from the voltage generator, detect a concentration of the target gas, generate the concentration information, and provide the generated concentration information to the control unit; and
When the voltage level of the power voltage is lower than the voltage level of the low voltage determination reference voltage for a predetermined time from the time when the power voltage is first transmitted from the switch, the voltage level of the power voltage is lower than the voltage level of the low voltage determination reference voltage. The height of the malfunction prevention unit;
A gas alarm device comprising a.
The method of claim 11,
The malfunction prevention unit,
an operating voltage generator configured to generate an operating voltage for a predetermined time from when the power supply voltage is initially transmitted;
a reference voltage generator receiving the operating voltage and generating the low voltage determination reference voltage;
a comparator which compares voltage levels of the power supply voltage and the low voltage determination reference voltage; and
a voltage boosting unit for applying the power supply voltage to one end of a fifth resistor element based on the output of the comparator indicating that the voltage level of the power supply voltage is lower than the voltage level of the low voltage determination reference voltage;
A gas alarm device comprising a.

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