CN210110001U

CN210110001U - Combustible gas alarm with mosquito and mouse expelling function

Info

Publication number: CN210110001U
Application number: CN201920567446.0U
Authority: CN
Inventors: 王荣庆
Original assignee: NINGBO LEXING INDUCTOR ELECTRONIC CO Ltd
Current assignee: NINGBO LEXING INDUCTOR ELECTRONIC CO Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-02-21
Anticipated expiration: 2029-04-24

Abstract

The utility model discloses a combustible gas alarm with mosquito repellent, rat repelling function, its technical scheme main points are, when gaseous detection device detected the threshold value that surpasss the system setting, system automatic switch to alarm output, make work in 3.3KHz to 3.5 KHz's the chimes of giving alarm of gaseous transfer to of 20KHz to 45 KHz's bee calling organ, utilize the system to detect combustible gas's concentration and carry out system function conversion, at ordinary times the gaseous detection device of system works in gaseous monitoring state all the time, but because detect combustible gas chance at ordinary times is very few, make most resource of the whole system all be in idle state at ordinary times, consequently the utility model discloses utilize MCU to produce the continuous scan frequency of 20KHz to 45KHz, make ceramic bee calling organ send the mosquito of 20KHz to 45KHz in succession, the extremely sensitive ultrasonic wave of animals such as mouse in order to play the mosquito repellent through the normally open contact of relay, Rat repelling effect.

Description

Combustible gas alarm with mosquito and mouse expelling function

Technical Field

The utility model relates to an alarm device, in particular to combustible gas alarm with mosquito repellent, rat repelling function.

Background

The combustible gas alarm is also called a gas leakage detection alarm instrument. When combustible gas leaks in industrial environment and daily life environment (such as a kitchen using natural gas), and the combustible gas alarm detects that the concentration of the combustible gas reaches an alarm value set by the alarm, the combustible gas alarm can send out sound and light alarm signals to remind people to take safety measures of evacuation, forced air exhaust, equipment shutdown and the like, so that the combustible gas alarm is an important safety guarantee instrument for production and life of people.

The utility model discloses a utility model patent that publication number is CN2173977 discloses a combustible gas alarm with power plug, load socket, load manual switch and complete machine structure integration, this alarm is equipped with plug socket part and control circuit board between upper and lower lid, is equipped with probe, bee calling organ and pilot lamp on the control circuit board, and the lower cover has power plug, and upper cover has load socket, manual switch, detection window, phonate hole and pilot lamp through-hole.

The combustible gas alarm has single function, only has combustible gas alarm function, is also a serious disaster area of mosquitoes and mice in household kitchens, offices, warehouses and other places, has no corresponding protective measures for disasters, and has certain improvement space.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a combustible gas alarm with mosquito repellent, rat repelling function possesses ultrasonic wave rat repelling ware, mosquito repellant function simultaneously on combustible gas reports to the police's basic function, can drive away from the effect to mouse, mosquito and other animals sensitive to this frequency channel.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a combustible gas alarm with mosquito and mouse repelling functions comprises an alarm circuit, wherein the alarm circuit comprises a combustible gas detection device, a control circuit and a warning circuit, and an alarm threshold value is preset in the control circuit;

when the combustible gas detection device detects that the gas concentration value is lower than the alarm threshold value, the control circuit controls the warning circuit to send out ultrasonic waves;

otherwise, when the combustible gas detection device detects that the gas concentration value is higher than the alarm threshold value, the control circuit controls the warning circuit to send out warning sound.

Preferably, the control circuit comprises a signal module; the warning circuit comprises an oscillating circuit coupled to the signal module and a sounding element coupled to the oscillating circuit;

when the combustible gas detection device detects that the gas concentration value is lower than the alarm threshold value, the control circuit controls the signal module to output an oscillation signal of ultrasonic frequency to the oscillation circuit, and the oscillation circuit responds to the oscillation signal of the frequency to drive the sound-generating element to generate ultrasonic waves;

on the contrary, when the combustible gas detection device detects that the gas concentration value is higher than the alarm threshold value, the control circuit controls the signal module to output an oscillation signal of the alarm tone frequency to the oscillation circuit, and the oscillation circuit responds to the oscillation signal of the frequency to drive the sound production element to produce the alarm sound which can be identified by human ears.

Preferably, the control circuit further includes a switch module, the warning circuit further includes a first boost circuit and a second boost circuit coupled to the sound generating element, and the switch module is coupled to the switching circuit;

when the signal module outputs an oscillation signal of the ultrasonic frequency, the switching circuit switches the first booster circuit to be coupled to the sound generating element so that the first booster circuit and the oscillation signal of the ultrasonic frequency are matched for boosting;

on the contrary, when the signal module outputs the oscillation signal of the warning audio frequency, the switching circuit switches the second booster circuit to be coupled to the sound generating element, so that the second booster circuit and the oscillation signal of the warning audio frequency are matched and boosted.

Preferably, the sound element is a passive buzzer.

Preferably, the alarm device further comprises a shell for accommodating the alarm circuit, and the shell comprises an upper cover and a bottom cover which are matched with each other.

Preferably, a circuit board for carrying an alarm circuit is arranged in the shell, the combustible gas detection device is arranged on the surface of the circuit board close to the upper cover, and an air inlet is formed in the position, corresponding to the combustible gas detection device, of the upper cover.

Preferably, the sound generating element is arranged on the surface of the circuit board close to the upper cover, and the upper cover is provided with a sound diffusion opening corresponding to the sound generating element.

Preferably, the side wall of the bottom cover is provided with heat dissipation holes.

To sum up, the utility model discloses following beneficial effect has:

1. when the concentration value of the combustible gas around the alarm is lower than the alarm threshold value, the control circuit can control the warning circuit to continuously send out ultrasonic waves with frequency bands which enable animals to feel sensitive, so that the effects of repelling rats and mosquitoes are achieved; when the concentration value of the combustible gas around the alarm is higher than the alarm threshold value, the control circuit can control the warning circuit to send out warning sound which can be identified by human ears so as to remind people of combustible gas leakage;

2. the single sound generating element can switch the generated sound (ultrasonic wave or warning sound) by receiving signals of different frequency bands, so that the use cost of components can be saved, and the occupied space in the shell can be reduced;

3. the sound production unit adopts a passive buzzer, the passive buzzer is low in manufacturing cost and wide in sound frequency range, ultrasonic waves with certain frequencies can be emitted in a high-decibel mode, and the sound mode switching is easier.

Drawings

FIG. 1 is a circuit diagram according to a first embodiment;

FIG. 2 is a circuit diagram according to a second embodiment;

fig. 3 is an exploded view of the third embodiment.

In the figure: 1. a circuit board; 2. a power supply circuit; 3. a combustible gas detection device; 4. a control circuit; 5. a warning circuit; 6. a signal module; 7. an oscillation circuit; 8. a sound emitting element; 9. a switch module; 10. a first booster circuit; 11. a second boost circuit; 12. a switching circuit; 13. an upper cover; 14. a bottom cover; 15. an air inlet; 16. a sound diffusing port; 17. a gas concentration display device; 18. a viewable port; 19. a visual window; 20. heat dissipation holes; 21. and a power plug.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

First embodiment, as shown in fig. 1, the combustible gas alarm with mosquito repellent, rat repelling function that this embodiment disclosed, including the casing, be provided with circuit board 1 in the casing, be provided with power supply circuit 2, combustible gas detection device 3, control circuit 4 and warning circuit 5 on the circuit board 1. The control circuit 4 can be a single chip microcomputer or a corresponding analog circuit; the power supply circuit 2 can supply power for the combustible gas detection device 3, the control circuit 4 and the warning circuit 5, so that the alarm can work normally. More specifically, an alarm threshold is preset in the control circuit 4; when the combustible gas detection device 3 detects that the gas concentration value is lower than the alarm threshold value, the control circuit 4 controls the warning circuit 5 to send out ultrasonic waves so as to play a role in repelling rats and mosquitoes; on the contrary, when the combustible gas detection device 3 detects that the gas concentration value is higher than the alarm threshold value, the control circuit 4 controls the warning circuit 5 to send out warning sound to remind people of combustible gas leakage.

More specifically, the control circuit 4 includes a signal module 6, which can output an oscillation signal of a specific frequency band under the control of the control circuit 4; the alarm circuit 5 includes an oscillation circuit 7 coupled to the signal module 6 and a sound-emitting element 8 coupled to the oscillation circuit 7, wherein the sound-emitting element 8 is a passive buzzer having a wide sound frequency range. When the combustible gas detection device 3 detects that the gas concentration value is lower than the alarm threshold value, it is indicated that the current combustible gas concentration does not reach the dangerous value, at this time, the control circuit 4 controls the signal module 6 to output an oscillation signal of the ultrasonic frequency to the oscillation circuit 7, the frequency range of the oscillation signal is preferably 20KHz-45KHz, the oscillation circuit 7 can respond to the oscillation signal of the frequency to drive the sound production element 8 to emit ultrasonic waves, animals such as mice and ants feel sensitive to the ultrasonic waves in the frequency range, but human ears cannot feel the ultrasonic waves, so the ultrasonic waves emitted by the sound production element 8 can play a role in repelling mice and mosquitoes, and have no influence on human beings.

On the contrary, when the combustible gas detection device 3 detects that the gas concentration value is higher than the alarm threshold value, which indicates that the current combustible gas concentration is too high, the control circuit 4 controls the signal module 6 to output an oscillation signal of the warning tone frequency to the oscillation circuit 7, the frequency of the oscillation signal is preferably 3.3KHz, and the oscillation circuit 7 can respond to the oscillation signal of the frequency to drive the sounding element 8 to emit warning tone which can be recognized by human ears, so as to remind people of combustible gas leakage.

Furthermore, the control circuit 4 further includes a switch module 9, which can be controlled by the control circuit 4 to output a corresponding switch signal (high level signal or low level signal); warning circuit 5 is still including coupling in first boost circuit 10 and the second boost circuit 11 of sound generating component 8, and the switching signal who is exported by switch module 9 is not enough to drive sound generating component 8, leads to sound generating component 8's vocal effect not good, matches it through boost circuit and steps up, can guarantee sound generating component 8 output sufficient power's ultrasonic wave or warning sound to the lift effect.

Further, a switching circuit 12 is coupled to the switch module 9; when the signal module 6 outputs an oscillation signal with an ultrasonic frequency (20KHz-45KHz), the switching circuit 12 switches the first booster circuit 10 to be coupled to the sound generating element 8, so that the first booster circuit 10 performs matching boosting with the oscillation signal with the ultrasonic frequency (20KHz-45 KHz);

on the contrary, when the signal module 6 outputs the oscillation signal with the warning tone frequency (3.3KHz), the switching circuit 12 switches the second voltage boost circuit 11 to be coupled to the sound generating element 8, so that the second voltage boost circuit 11 performs matching voltage boost with the oscillation signal with the warning tone frequency (3.3 KHz). The switching action of the switching circuit 12 can be matched with the boosting circuits of different levels under different sound production modes (ultrasonic wave modes or alarm modes) of the sound production element 8, so that the sound production element 8 can exert the best effect under different sound production modes.

Furthermore, the oscillating circuit 7 includes a current-limiting resistor R1 and an NPN-type transistor Q1, the sound-generating element 8 is a passive buzzer SP, the first voltage-boosting circuit 10 is an inductor L1, the second voltage-boosting circuit 11 is an inductor L2, and the switching circuit 12 includes a relay K and an NPN-type transistor Q2.

For convenience, two ends of the inductor L1 are defined as a P1 end and a P3 end, respectively, and two ends of the inductor L2 are defined as a P2 end and a P4 end, respectively; the relay K comprises a coil and normally closed contacts K-1 and K-2. The fixed end of the normally closed contact K-1 is coupled to one end of the buzzer SP, the two switching ends are coupled to the end P1 and the end P2 respectively, and the contact K-1 is switched to the end P1 in a normally closed state; accordingly, the fixed end of the normally closed contact K-2 is coupled to the other end of the buzzer SP, the two switching ends are coupled to the P3 end and the P4 end, respectively, and the contact K-2 is switched to the P3 end in the normally closed state. One end of the resistor R1 is coupled to the output end of the signal module 6 to receive a corresponding oscillation signal, the other end of the resistor R1 is coupled to the base of the transistor Q1, the P3 and the P4 are both coupled to the collector of the transistor Q1, and the emitter of the transistor Q1 is grounded. The fixed end of the normally closed contact K-1 is also coupled to a power supply VCC, and the output voltage of the power supply VCC is 5V.

One end of the coil of the relay K is coupled to the power source VCC, the other end is coupled to the collector of the transistor Q2, the base of the transistor Q2 is coupled to the output end of the switch module 9 to receive the corresponding switching signal, and the emitter of the transistor Q2 is grounded. The normally closed contacts K-1 and K-2 are both controlled by the coil of the relay K.

The working principle of the circuit is as follows:

when the combustible gas detection device 3 detects that the concentration value of the combustible gas is lower than the alarm threshold value, the control circuit 4 controls the signal module 6 to output an oscillation signal in a frequency range of 20KHz-45KHz, and the oscillation signal is transmitted to the base electrode of the triode Q1 through the resistor R1, and the triode Q1 is correspondingly switched on and off according to the frequency of the received oscillation signal so as to adjust the output duty ratio. Meanwhile, the switch module 9 outputs a low-level switch signal to the base of the triode Q2, so that the triode Q2 is cut off, the coil of the relay K is in a power-off state, and the corresponding normally-closed contacts K-1 and K-2 are both in a closed state and are respectively connected to the P1 end and the P3 end of the inductor L1. At the moment, the inductor L1 boosts the voltage to drive the buzzer SP, namely, the inductance value of the inductor L1 is matched with the frequency signal of 20KHz-45KHz to boost the voltage, so that the buzzer SP sweeps the frequency to emit the ultrasonic wave of 20KHz-45KHz, and the effects of repelling rats and mosquitoes are achieved.

On the contrary, when the combustible gas detection device 3 detects that the concentration value of the combustible gas is higher than the alarm threshold value, the control circuit 4 controls the signal module 6 to output a 3.3KHz oscillation signal, and the oscillation signal is transmitted to the base electrode of the triode Q1 through the resistor R1, and the triode Q1 is correspondingly switched on and off according to the frequency of the received oscillation signal so as to adjust the output duty ratio. Meanwhile, the switch module 9 outputs a high-level switch signal to the base of the triode Q2, so that the triode Q2 is turned on, the coil of the relay K is electrified and attracted, and the corresponding normally closed contacts K-1 and K-2 both act and are respectively connected to the P2 end and the P4 end of the inductor L2. At the moment, the inductor L2 boosts the voltage to drive the buzzer SP, namely, the inductance value of the inductor L2 is matched with the frequency signal of 3.3KHz for boosting the voltage, so that the buzzer SP sweeps the frequency to give out sound alarm to remind people of combustible gas leakage.

In the above working process, the control circuit 4 controls the signal module 6 and the switch module 9 to output the corresponding oscillating signal and the corresponding switching signal according to the gas concentration value detected by the combustible gas detection device 3, which can be realized by a built-in program of a single chip or an equivalent analog circuit, and belongs to common knowledge in the art, and is not described herein. In addition, the input end of the power circuit 2 is provided with a power plug 21, the power plug 21 is arranged outside the shell, so that the power supply can be switched on only by directly inserting the power plug 21 of the alarm device into the existing power socket, and meanwhile, the installation and fixation functions can be realized, and the power circuit 2 can correspondingly process the socket power supply to be used by the internal circuit of the alarm device, which belongs to the common general knowledge in the field and is not described herein.

In the second embodiment, as shown in fig. 2, on the basis of the first embodiment, a low concentration threshold is preset in the control circuit 4, the control circuit 4 is further coupled with a gas concentration display device 17, the gas concentration display device 17 is preferably an LED nixie tube, and the display operation principle of the LED nixie tube belongs to the common knowledge in the art and is not described herein again. When the combustible gas detection device 3 detects that the gas concentration value is lower than the alarm threshold value and higher than the low concentration threshold value, the control circuit 4 controls the gas concentration display device 17 to display the current gas concentration value so as to remind a user, and the method is more humanized.

In the third embodiment, as shown in fig. 3, on the basis of the second embodiment, the housing includes an upper cover 13 and a bottom cover 14 which are matched with each other, and the upper cover and the bottom cover are fixed by screws, which are not shown in the figure. The combustible gas detection device 3 is arranged on the surface of the circuit board 1 close to the upper cover 13 and welded on the circuit board 1. The upper cover 13 is provided with an air inlet 15 corresponding to the combustible gas detection device 3, so that external gas can enter the shell, and the combustible gas detection device 3 can conveniently detect the concentration. The sounding element 8 is arranged on the surface of the circuit board 1 close to the upper cover 13, and is welded on the circuit board 1, and the upper cover 13 is provided with a sound diffusion port 16 corresponding to the sounding element 8, so that ultrasonic waves or warning sounds emitted by the sounding element 8 are transmitted to the outside of the shell. Gas concentration display device 17 sets up in the face that circuit board 1 is close to upper cover 13, and it welds on circuit board 1, but upper cover 13 has seted up view port 18 corresponding to gas concentration display device 17 department, but the card has visual window 19 in the view port 18, and the numerical value that shows in the gas concentration display device 17 is looked over to the user of being convenient for. The side wall of the bottom cover 14 is provided with heat dissipation holes 20.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A combustible gas alarm with mosquito repellent, rat repelling function, characterized by: the device comprises an alarm circuit, wherein the alarm circuit comprises a combustible gas detection device (3), a control circuit (4) and a warning circuit (5), and an alarm threshold value is preset in the control circuit (4);

when the combustible gas detection device (3) detects that the gas concentration value is lower than the alarm threshold value, the control circuit (4) controls the warning circuit (5) to send out ultrasonic waves;

on the contrary, when the combustible gas detection device (3) detects that the gas concentration value is higher than the alarm threshold value, the control circuit (4) controls the warning circuit (5) to send out warning sound.

2. The combustible gas alarm with mosquito and mouse repelling functions as claimed in claim 1, wherein: the control circuit (4) comprises a signal module (6); the warning circuit (5) comprises an oscillating circuit (7) coupled to the signal module (6) and a sounding element (8) coupled to the oscillating circuit (7);

when the combustible gas detection device (3) detects that the gas concentration value is lower than the alarm threshold value, the control circuit (4) controls the signal module (6) to output an oscillation signal of ultrasonic frequency to the oscillation circuit (7), and the oscillation circuit (7) responds to the oscillation signal of the frequency to drive the sound generating element (8) to generate ultrasonic waves;

on the contrary, when the combustible gas detection device (3) detects that the gas concentration value is higher than the alarm threshold value, the control circuit (4) controls the signal module (6) to output an oscillation signal of the alarm audio frequency to the oscillation circuit (7), and the oscillation circuit (7) responds to the oscillation signal of the frequency to drive the sounding element (8) to give out the alarm sound which can be identified by human ears.

3. The combustible gas alarm with mosquito and mouse repelling functions as claimed in claim 2, wherein: the control circuit (4) further comprises a switch module (9), the warning circuit (5) further comprises a first booster circuit (10) and a second booster circuit (11) which are coupled to the sound generating element (8), and a switching circuit (12) is coupled to the switch module (9);

when the signal module (6) outputs the oscillation signal of the ultrasonic frequency, the switching circuit (12) switches the first boosting circuit (10) to be coupled to the sound generating element (8) so that the first boosting circuit (10) performs matching boosting with the oscillation signal of the ultrasonic frequency;

on the contrary, when the signal module (6) outputs the oscillation signal of the warning sound frequency, the switching circuit (12) switches the second boosting circuit (11) to be coupled to the sound generating element (8), so that the second boosting circuit (11) and the oscillation signal of the warning sound frequency are matched for boosting.

4. The combustible gas alarm with mosquito and mouse repelling functions as claimed in claim 2, wherein: the sound element (8) is a passive buzzer.

5. The combustible gas alarm with mosquito and mouse repelling functions as claimed in any one of claims 2 to 4, wherein: the alarm device also comprises a shell used for accommodating the alarm circuit, and the shell comprises an upper cover (13) and a bottom cover (14) which are matched with each other.

6. The combustible gas alarm with mosquito and mouse repelling functions as claimed in claim 5, wherein: be provided with in the casing and be used for carrying on warning circuit's circuit board (1), combustible gas detection device (3) set up in circuit board (1) and are close to the face of upper cover (13), air inlet (15) have been seted up corresponding to combustible gas detection device (3) department in upper cover (13).

7. The combustible gas alarm with mosquito and mouse repelling functions as claimed in claim 5, wherein: the sound production element (8) is arranged on the surface, close to the upper cover (13), of the circuit board (1), and the upper cover (13) is provided with a sound diffusion opening (16) corresponding to the sound production element (8).

8. The combustible gas alarm with mosquito and mouse repelling functions as claimed in claim 5, wherein: the side wall of the bottom cover (14) is provided with a heat dissipation hole (20).