CN115100824A - Incremental gas detection method and safe gas equipment thereof - Google Patents

Incremental gas detection method and safe gas equipment thereof Download PDF

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Publication number
CN115100824A
CN115100824A CN202210817092.7A CN202210817092A CN115100824A CN 115100824 A CN115100824 A CN 115100824A CN 202210817092 A CN202210817092 A CN 202210817092A CN 115100824 A CN115100824 A CN 115100824A
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gas
alarm
lel
value
increment
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Inventor
胡珊
陈磊
周奕龙
钱小军
周忠柱
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Foshan Yipinhui Electric Co ltd
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Foshan Yipinhui Electric Co ltd
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Priority to CN202210817092.7A priority Critical patent/CN115100824A/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
    • G08B21/16—Combustible gas alarms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D5/00—Protection or supervision of installations
    • F17D5/02—Preventing, monitoring, or locating loss
    • F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C2201/00—Transmission systems of control signals via wireless link
    • G08C2201/60—Security, fault tolerance
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Management (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

The invention relates to an incremental gas detection method and safe gas equipment thereof, wherein the incremental gas detection method comprises a gas alarm; recording the output value of the gas alarm under the normal environment of factory calibration as z% LEL, taking the z% LEL as a calibration increment zero value, and marking as Vz; setting to give an alarm when the gas concentration value in the detection environment is x% LEL, recording the output value of the gas alarm as x% LEL, taking the x% LEL as a calibration alarm value, and marking as Vx; the calibrated alarm increment value is Vx-Vz = x% LEL-z% LEL and is marked as V Increment of ；V Increment of Stored in the gas alarm;in the actual environment with normal gas concentration, the actual increment zero value of the gas alarm is marked as Vy; when the gas alarm detects that the gas concentration in the actual environment is more than or equal to Vy + V Increment of Then, an alarm task is executed, namely the actual alarm value is y% LEL + x% LEL-z% LEL and marked as V Alarm device . The incremental gas detection method can reduce the false alarm rate of gas detection, ensure the accuracy of gas detection results and improve the gas use safety.

Description

Incremental gas detection method and safe gas equipment thereof
Technical Field
The invention relates to gas equipment, in particular to an incremental gas detection method and safe gas equipment thereof.
Background
Chinese patent document CN2011202960144 discloses: an alarm device of a gas water heater based on a harmful gas sensing technology, Chinese patent document CN2017207055790 discloses: an intelligent gas alarm device of a gas water heater; the technical solutions disclosed in the above two patents are the same: the water heater is provided with a detection device for detecting the gas concentration to detect the gas concentration (the gas comprises one or more than two of CO, CH4 and other harmful gases) in the surrounding environment of the water heater, and once the gas is abnormal (the gas concentration is too high), the detection device can perform sound and light alarm and cut off the relevant valve body inside the water heater, and ventilate through draught fan air suction to reduce the gas concentration in the surrounding environment. However, when the water heater is installed in a kitchen or other places where the environment is relatively harsh, there are other gases such as oil smoke and water vapor in the environment, the damage to the detection element of the gas sensor in the detection device is large, after the gas sensor is used for a short time (generally three months or more), the detection element of the gas sensor basically reaches an uncontrollable range (the gas sensor is influenced by the environment, data can drift, and the factory-calibrated reference value and the alarm value of the gas sensor are respectively fixed and unchangeable, so that the detection range can be reduced when the data on the gas sensor drift, the false alarm rate is extremely high, the false alarm phenomenon occurs, the judgment range of the gas sensor can be influenced under the conditions of standby of gas equipment, insufficient combustion of gas and the like), the detection result of the detection element of the gas sensor is abnormal, and the detection result is influenced, so that the great potential safety hazard exists.
Therefore, further improvements are needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an incremental gas detection method and safe gas equipment thereof.
The purpose of the invention is realized as follows:
an incremental gas detection method comprises a gas alarm for detecting the gas concentration in the environment;
recording the output value of the gas alarm under the normal environment of factory calibration as z% LEL, taking the z% LEL as a calibration increment zero value, and marking as Vz; setting to give an alarm when the gas concentration value in the detection environment is x% LEL, recording the output value of the gas alarm as x% LEL, taking the x% LEL as a calibration alarm value, and marking as Vx; calibrating the alarm increment value to be Vx-Vz = x% LEL-z% LEL and marked as V Increment of ，V Increment of =Vx—Vz；V Increment of Is stored on the gas alarm;
in the actual environment with normal gas concentration, the actual increment zero value of the gas alarm is marked as Vy; when the gas alarm detects that the gas concentration in the actual environment is more than or equal to Vy + V Increment of Then, an alarm task is executed, namely the actual alarm value is y% LEL + x% LEL-z% LEL and marked as V Alarm device ，V Alarm device =Vy+Vx-Vz=Vy+V Increment of 。
As a specific scheme, selecting an actual incremental zero value Vy: the incremental gas detection method is set with a zero limit value marked as V Extreme limit (ii) a At a time point, the gas alarm acquires a reference data value and marks the reference data value as V Datum ；
If V Reference(s) < Vz, then z% LEL as the actual incremental zero value, Vy = Vz, V Alarm device =Vx；
If Vz is less than or equal to V Datum ≤V Extreme limit Then record the first V Datum (ii) a Continue to collect the second V Reference(s) If the second Vz is less than or equal to V Datum ≤V Extreme limit Then record the second V Datum … … continue to collect the nth V Datum If the nth Vz is less than or equal to V Datum ≤V Extreme limit Then record the nth V Datum (ii) a With n number of V Datum Is taken as an actual increment zero value, namely the actual increment zero value is (first V) Datum + second V Datum + … … nth V Datum ) N, Vy = n V Datum Average value of (1), V Alarm device = n V Reference(s) Average value of + V Increment of 。
In another specific scheme, the zero limit value is 4% LEL-6% LEL, and preferably 5% LEL.
As another specific scheme, the fuel gas alarm is preheated and then acquires an initial point data value V Initial ：
If V Initiation of ≥V Extreme limit Then Vy = Vz, V Alarm device = Vz+V Increment of ；
If V Initial ＜V Extreme limit Then with V Initial Corresponding data value is taken as Vy, then Vy = V Initial ，V Alarm device =V Initial +V Increment of 。
As another specific scheme, the calibrated alarm increment value is 8% -12% LEL, and preferably 10% LEL.
The safe gas equipment applying the incremental gas detection method comprises,
the gas-fired boiler comprises an equipment body, wherein an air inlet pipeline for introducing fuel gas is arranged on the equipment body;
the stop valve module is arranged on the air inlet pipeline to open or close the air inlet pipeline;
the gas alarm, the gas alarm set up in on the equipment body, the gas alarm is including alarm main control board and the gaseous detection module who is used for detecting the gas, gaseous detection module electricity is connected the alarm main control board, alarm main control board control connection the stop valve module.
As a specific scheme, an equipment main control board and a communication module are arranged on the equipment body, the alarm main control board is in communication connection with the equipment main control board, and the equipment main control board performs information interaction with the cloud server and/or the remote control terminal through the communication module.
As another specific scheme, a wireless sending module is arranged on the gas alarm, and the wireless sending module is electrically connected with the alarm main control board; the stop valve module comprises a stop valve body and a wireless receiving module, and the stop valve body is electrically connected with the wireless receiving module; the wireless sending module and the wireless receiving module are wirelessly interacted, so that the stop valve body is in wireless communication connection with the alarm main control board.
As another specific solution, the stop valve module further includes a power supply module for supplying power to the wireless receiving module, and a voltage boost circuit for boosting voltage; the wireless receiving module is electrically connected with the power supply module, and the booster circuit is electrically connected between the wireless receiving module and the stop valve body.
As another specific scheme, one end of the air inlet pipeline is communicated with an air supply terminal, and the other end of the air inlet pipeline is communicated with an air inlet on the equipment body; a gas meter for detecting gas pressure is arranged on the gas inlet pipeline; the stop valve module is arranged between the gas supply terminal and the gas meter.
As another specific scheme, the stop valve module comprises a stop valve body, and the alarm main control board is in wired communication connection with the stop valve body.
As another specific scheme, one end of the air inlet pipeline is communicated with an air supply terminal, and the other end of the air inlet pipeline is communicated with an air inlet on the equipment body; a gas meter for detecting gas pressure is arranged on the gas inlet pipeline; the stop valve module is arranged between the gas meter and the gas inlet.
The invention has the following beneficial effects:
1. in the incremental gas detection method, a fixed calibration alarm incremental value is set when a gas alarm leaves a factory and is marked as V Increment of (ii) a In the actual use process of the gas equipment, the gas alarm selects a reference point at a time point, and the reference point is marked as V Datum When the gas concentration in the detection environment exceeds the calibrated alarm increment value, the gas alarm executes an alarm task; compared with the traditional gas detection mode, the reference point V in the incremental gas detection method Datum Variable according to the actual situation, V Datum The change of the reference point is adapted to the data drift of the gas alarm, so that the phenomenon of misjudgment caused by the fixed reference point can be effectively avoided. Therefore, the incremental gas detection method can effectively reduce the false alarm rate, ensure that the real gas leakage condition can alarm and feed back in time, is favorable for solving the problem of false alarm caused by data drift, ensures the accuracy of the gas detection result and improves the gas use safety;
2. when gas leakage occurs in the traditional gas equipment, even if a related valve body in the gas equipment is closed, the gas can still diffuse due to the fact that a gas leakage point cannot be accurately found, and the gas diffusion cannot be inhibited when a cleaning fan is started; when gas leakage occurs, the gas equipment directly controls the stop valve module to shut off the main gas source, so that the gas equipment is wholly shut off, and further disasters caused by gas equipment faults or leakage at other places are effectively avoided.
3. In the safe gas equipment, once a gas alarm detects that the gas concentration in the surrounding environment is abnormal, a stop valve module is controlled in a wired or wireless mode in time to cut off a main gas source and store data information in the gas equipment, the gas equipment uploads the relevant data information to a cloud server through a communication module, and a background system on the cloud server is in contact with after-sales active maintenance according to actual needs; therefore, compared with the traditional system that the user actively feeds back the complex operations of after-sales service and after-sales service, the safe gas equipment can feed the after-sales service in advance on the premise that the user does not feed back the abnormal conditions in the first time, and the gas use safety is effectively ensured.
Drawings
FIG. 1 is a logic diagram for selecting an incremental zero value according to an embodiment of the present invention.
Fig. 2 is a logic diagram of a self-test of the gas alarm in an embodiment of the invention.
Fig. 3 is a schematic data diagram of factory calibration in an embodiment of the present invention.
FIG. 4 shows a view of a view V Datum Schematic of data at < Vz.
FIG. 5 shows that Vz is less than or equal to V in one embodiment of the present invention Datum ≤V Extreme limit Schematic of the data at time.
FIG. 6 shows a view of a section V in an embodiment of the present invention Initial ≥V Extreme limit Schematic of the data at time.
FIG. 7 shows a view of a section V in an embodiment of the present invention Initial ＜V Extreme limit Data schematic of time.
Fig. 8 is an exploded view of the device body and the gas alarm according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a wireless connection scheme of a gas appliance according to an embodiment of the present invention.
Fig. 10 is a schematic diagram of a wireless connection scheme for a gas appliance according to an embodiment of the present invention.
Fig. 11 is a schematic view of a gas appliance connected by a cable according to an embodiment of the present invention.
Fig. 12 is a diagram of an embodiment of the present invention, illustrating a gas appliance wired connection scheme.
Fig. 13 is a security function diagram of the gas device in an embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and examples.
Referring to fig. 1 to 7, the incremental gas detection method according to the present embodiment includes a gas alarm 2 for detecting the gas concentration in the environment;
referring to fig. 3, the factory calibration is performed in a normal environment (generally, in a clean environment, the concentration of fuel gas in this environment is 0% LEL; where "LEL" refers to the lower explosion limit, and the lowest explosion of fuel gas in air when meeting open fire is performedConcentration, called lower explosion limit-abbreviated as "LEL") the output value of the gas alarm 2 is recorded as z% LEL =0% LEL (i.e. the gas concentration in the detection environment is 0%), and z% LEL is taken as a calibration increment zero value and is marked as Vz; setting to give an alarm when the gas concentration value in the detection environment is x% LEL, recording the output value of the gas alarm 2 as x% LEL, taking the x% LEL as a calibration alarm value, and marking as Vx; the calibrated alarm increment value is Vx-Vz = x% LEL-z% LEL and is marked as V Increment of ，V Increment of =Vx—Vz；V Increment of Stored in the control system of the gas alarm 2; in this embodiment, the calibrated alarm increment value is preferably 10% LEL (i.e. the gas concentration in the detection environment is 10%), i.e. Vx = V Increment of + Vz=0%LEL+10%LEL=10%LEL；
In the actual environment with normal gas concentration, the actual increment zero value of the gas alarm 2 is marked as Vy, and the Vy changes according to the change of the surrounding environment; when the gas alarm 2 detects that the gas concentration in the actual environment is more than or equal to Vy + V Increment of When, an alarm task is performed, i.e. the actual alarm value is y% LEL + x% LEL-z% LEL = Vy +10% LEL and is marked as V Alarm device ，V Alarm device =Vy+Vx-Vz=Vy+V Increment of 。
The incremental gas detection method can effectively reduce the false alarm rate, ensure real gas leakage condition to alarm and feed back in time, is favorable for solving the problem of false alarm caused by data drift, ensures accurate gas detection result and improves gas use safety.
Further, in the use process of the gas equipment, selecting an actual incremental zero value Vy: the incremental gas detection method is set with a zero limit value marked as V Extreme limit The zero limit value in this embodiment is preferably 5% LEL; at a time, the gas alarm 2 collects a reference data value and marks it as V Datum (ii) a In the embodiment, one minute is set as a time point, namely, one reference data value is acquired every minute;
see fig. 4, if V Datum < Vz, then z% LEL as the actual incremental zero value, Vy = Vz =0% LEL, V Alarm device = Vx =10% LEL; note: in this case Vz ≠ 0% LEL.
Referring to FIG. 5, if Vz ≦ V Datum ≤V Extreme limit Then record the first V Datum (ii) a Continue to collect the second V Datum If the second Vz is less than or equal to V Datum ≤V Extreme limit Then record the second V Reference(s) … … continue to collect the nth V Reference(s) If the nth Vz is less than or equal to V Datum ≤V Extreme limit Then record the nth V Datum (ii) a With n number of V Reference(s) Is taken as an actual increment zero value, namely the actual increment zero value is (first V) Datum + second V Datum + … … nth V Datum ) N, Vy = n V Datum Average value of (1), V Alarm device = n V Datum Average value of + V Increment of 。
Further, after the gas equipment where the gas alarm 2 is located is powered on, the gas alarm 2 starts to preheat, and the gas alarm 2 collects an initial point data value V after completing preheating within a set time Initial ：
See fig. 6, if V Initiation of ≥V Extreme limit Then Vy = Vz, V Alarm device = Vz+V Increment of ；
See fig. 7, if V Initial ＜V Extreme limit Then with V Initial Corresponding data value as V y Then Vy = V Initial ，V Alarm device =V Initial +V Increment of 。
Referring to fig. 8-13, the safety gas appliance to which the above incremental gas detection method is applied includes,
the gas-fired boiler comprises an equipment body 1, wherein an air inlet pipeline 3 for introducing fuel gas is arranged on the equipment body 1; the gas appliance according to the embodiment is a gas water heater, and may be a wall-mounted furnace or the like;
the stop valve module 5 is arranged on the air inlet pipeline 3 to open or close the air inlet pipeline 3;
gas alarm 2, gas alarm 2 are fixed to be set up on equipment body 1, and gas alarm 2 is including alarm main control board 201 and the gaseous detection module 202 that is used for detecting the gas, and alarm main control board 201, alarm main control board 201 control connection stop valve module 5 are connected to gaseous detection module 202 electricity.
When gas leakage occurs, the gas equipment directly controls the stop valve module 5 to cut off the main gas source, so that the gas equipment is integrally cut off, and further, disasters caused by gas equipment faults or leakage at other places are effectively avoided.
Further, the device body 1 is provided with a device main control board 101 and a communication module 102, the alarm main control board 201 is in communication connection with the device main control board 101, and the device main control board 101 performs information interaction with the cloud server 12 and the remote control terminal 13 through the communication module 102. In the safe gas equipment, once a gas alarm 2 detects that the gas concentration in the surrounding environment is abnormal, a stop valve module 5 is controlled in a wired or wireless mode in time to cut off a total gas source and store data information in the gas equipment, the gas equipment uploads relevant data information to a cloud server 12 through a communication module 102, a background system on the cloud server 12 is in contact with and actively maintains the gas equipment after sale according to actual needs, and meanwhile the cloud server 12 sends relevant data information to a remote control terminal 13; it can be seen that compared with the traditional system that the user needs to actively feed back the complicated operations of after-sales service and after-sales service, on the premise that the user does not feed back the abnormal condition in the first time, the cloud server 12 is changed from the traditional passive notification to the active notification, so that the after-sales service can be fed in advance, and the gas use safety can be effectively ensured.
Further, the communication mode between the gas alarm 2 and the stop valve module 5 comprises wireless connection, wired connection and the like:
the wireless connection mode is adopted, so that the wireless connection mode,
referring to fig. 9 and 10, a wireless transmission module 203 is arranged on the gas alarm 2, the wireless transmission module 203 is electrically connected with an alarm main control board 201, and the wireless transmission module 203 is connected with a transmission antenna 206; the stop valve module 5 comprises a stop valve body 501 and a wireless receiving module 502, the stop valve body 501 is electrically connected with the wireless receiving module 502, the wireless receiving module 502 is connected with a receiving antenna 505, and the wireless receiving module 502 mainly receives signals sent by the equipment main control board 101 and outputs high level; the wireless sending module 203 and the wireless receiving module 502 are wirelessly interacted, so that the stop valve body 501 is in wireless communication connection with the alarm main control board 201; the communication protocol between the wireless sending module 203 and the wireless receiving module 502 includes 433 module communication protocol, 2.4G wireless communication protocol, etc.;
the cut-off valve module 5 further comprises a power supply module 503 for supplying power to the wireless receiving module 502, and a voltage boosting circuit 504 for boosting voltage; the wireless receiving module 502 is electrically connected with the power supply module 503, and the booster circuit 504 is electrically connected between the wireless receiving module 502 and the stop valve body 501;
one end of the air inlet pipeline 3 is communicated with an air supply terminal, and the other end of the air inlet pipeline is communicated with an air inlet 6 on the equipment body 1; a gas meter 4 for detecting gas pressure is arranged on the gas inlet pipeline 3; the stop valve module 5 is arranged between the gas supply terminal and the gas meter 4; the gas equipment comprises a combustor 8, the gas inlet end of the combustor 8 is communicated with a gas inlet 6 at the bottom of the equipment body 1, the gas inlet end of a gas inlet pipeline 3 is communicated with a gas source, the gas outlet end of the gas inlet pipeline 3 is communicated with the gas inlet 6, and a gas meter 4 for detecting gas pressure is arranged on the gas inlet pipeline 3;
in a wireless connection mode, the stop valve module 5 is installed at the front end of the gas meter 4 and is mainly convenient for cutting off a main gas source; the gas alarm 2 comprises an indicator lamp 204 for implementing light alarm and a buzzer 205 for implementing sound alarm; when the gas alarm 2 detects an abnormality (the gas concentration in the detection environment is too high), the alarm main control board 201 feeds information back to the equipment main control board 101 (MCU), the equipment main control board 101 displays an alarm fault code after receiving the message, the gas alarm 2 gives out an acoustic and optical alarm and cuts off the gas proportional valve 104 on the equipment body 1, meanwhile, the wireless sending module 203 transmits a command signal to the wireless receiving module 502, the wireless receiving module 502 receives the command signal and continuously outputs a high level, the booster circuit 504 drives the stop valve body 501 to cut off the total gas source, then the equipment main control board 101 transmits relevant detection information data to the cloud server 12 through the communication module 102, a background data center on the cloud server 12 can contact the gas company for maintenance at the first time after collecting the information data, and the cloud server 12 can also connect the remote control terminal 13 (for example, electronic equipment loaded with related APP or WeChat applet comprises a smart phone, a tablet personal computer and the like) reminds a user of abnormity such as gas leakage in a home, realizes dual feedback of a user side and an after-sale end, reminds the user and actively goes to the home after sale for service, and ensures that the water heater does not have gas leakage.
The mode of the wired connection is that,
referring to fig. 11 and 12, the stop valve module 5 includes a stop valve body 501, and the alarm main control board 201 is connected to the stop valve body 501 in a wired communication manner;
one end of the air inlet pipeline 3 is communicated with an air supply terminal, and the other end of the air inlet pipeline is communicated with an air inlet 6 on the equipment body 1; a gas meter 4 for detecting gas pressure is arranged on the gas inlet pipeline 3; the stop valve module 5 is arranged between the gas meter 4 and the gas inlet 6; the stop valve module 5 adopts a relay, and the contact part is completely isolated, so that the influences of external static electricity, voltage abnormity and the like are effectively shielded; the stop valve module 5 meets the requirement of safe extra-low voltage, and the misoperation or safety event caused by the fact that high voltage is connected into the stop valve module 5 in series is effectively avoided;
under the wired connection mode, when the gas alarm 2 detects abnormality (the gas concentration in the detection environment is too high), the stop valve body 501 is immediately driven to cut off the main gas source, sound and light alarm is given out, an alarm fault code is displayed, relevant detection information data are transmitted to the cloud server 12 through the communication module 102 and are fed back to the remote control terminal 13.
Further, a mounting groove 105 is formed in the side portion of the equipment body 1, the gas alarm 2 is embedded in the mounting groove 105, and the gas alarm 2 and the equipment body 1 are connected in a buckled mode; gas alarm 2 installs in 1 side of equipment body, can detect the gas concentration of 1 external environment of equipment body and internal environment, plays dual protection and controls.
Further, the safety gas equipment also comprises a heat exchanger 9 for heating water, a scavenging fan 103 for pumping and discharging leaked gas and a gas proportional valve 104 for controlling the ratio of gas to air, wherein the scavenging fan 103 and the proportional valve 104 are respectively and electrically connected with the main control panel 101 of the equipment; the device main control board 101 is arranged in the device body 1, the alarm main control board 201 and the stop valve module 5 are respectively electrically connected with the device main control board 101, the device main control board 101 controls the stop valve module 5, and the alarm main control board 201 obtains electric energy from an external power grid through the device main control board 101; the heat exchanger 9 is arranged in the equipment body 1, and the equipment body 1 is provided with a water inlet 7 communicated with a water inlet end of the heat exchanger 9 and a water outlet 11 communicated with a water outlet end.
The foregoing is a preferred embodiment of the present invention, and the basic principles, main features and advantages of the present invention are shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is intended to be protected by the following claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. An incremental gas detection method is characterized in that: comprises a gas alarm (2) for detecting the gas concentration in the environment;
the output value of the gas alarm (2) in the factory calibration normal environment is marked as z% LEL, the z% LEL is used as a calibration increment zero value, and the value is marked as Vz; setting to give an alarm when the gas concentration value in the detection environment is x% LEL, recording the output value of the gas alarm (2) as x% LEL, taking the x% LEL as a calibration alarm value, and marking as Vx; the calibrated alarm increment value is Vx-Vz = x% LEL-z% LEL and is marked as V Increment of ，V Increment of =Vx—Vz； V Increment of Is stored on the gas alarm (2);
in the actual environment with normal gas concentration, the actual increment zero value of the gas alarm (2) is marked as Vy; when the gas alarm (2) detects that the gas concentration in the actual environment is more than or equal to Vy + V Increment of Then, an alarm task is performed, i.e., the actual alarm value is y% LEL + x% LEL-z% LEL and marked as V Alarm device ，V Alarm device =Vy+Vx-Vz=Vy+V Increment of 。
2. The incremental gas detection method according to claim 1, wherein: selection of an actual incremental zero value Vy: the incremental gas detection method is set with a zero limit value marked as V Extreme limit (ii) a At a time point, the gas alarm (2) collects oneReference data value and marked as V Datum ；
If V Datum < Vz, then use z% LEL as the actual incremental zero value, Vy = Vz, V Alarm device =Vx；
If Vz is less than or equal to V Datum ≤V Extreme limit Then record the first V Reference(s) (ii) a Continue to collect the second V Reference(s) If the second Vz is less than or equal to V Datum ≤V Extreme limit Then record the second V Datum … … continue to collect the nth V Reference(s) If the nth Vz is less than or equal to V Datum ≤V Extreme limit Then record the nth V Reference(s) (ii) a With n number of V Reference(s) Is taken as an actual increment zero value, namely the actual increment zero value is (first V) Datum + second V Datum + … … nth V Datum ) N, Vy = n V Datum Average value of (1), V Alarm device = n V Datum Average value of + V Increment of 。
3. The incremental gas detection method according to claim 2, wherein: the zero limit value is 4-6% LEL.
4. The incremental gas detection method according to claim 2, wherein: the gas alarm (2) collects an initial point data value V after being preheated Initiation of ：
If V Initial ≥V Extreme limit Then Vy = Vz, V Alarm device = Vz+V Increment of ；
If V Initial ＜V Extreme limit Then with V Initial Corresponding data value is taken as Vy, then Vy = V Initial ，V Alarm device =V Initial +V Increment of 。
5. The incremental gas detection method according to claim 1, wherein: the calibrated alarm increment value is 8% -12% LEL.
6. Safety gas equipment applying the incremental gas detection method according to any one of claims 1 to 5, characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the gas-fired boiler comprises an equipment body (1), wherein an air inlet pipeline (3) for introducing fuel gas is arranged on the equipment body (1);
a shut-off valve module (5), said shut-off valve module (5) being arranged on said air intake line (3) to open or close said air intake line (3);
gas alarm (2), gas alarm (2) set up in on equipment body (1), gas alarm (2) are including alarm main control board (201) and gas detection module (202), gas detection module (202) electricity is connected alarm main control board (201), alarm main control board (201) control connection stop valve module (5).
7. The safety gas appliance according to claim 6, characterized in that: the alarm device is characterized in that an equipment main control board (101) and a communication module (102) are arranged on the equipment body (1), the alarm main control board (201) is in communication connection with the equipment main control board (101), and the equipment main control board (101) performs information interaction with a cloud server (12) and/or a remote control terminal (13) through the communication module (102).
8. The safety gas appliance according to claim 6, characterized in that: a wireless sending module (203) is arranged on the gas alarm (2), and the wireless sending module (203) is electrically connected with the alarm main control board (201); the stop valve module (5) comprises a stop valve body (501) and a wireless receiving module (502), and the stop valve body (501) is electrically connected with the wireless receiving module (502); the wireless sending module (203) is wirelessly interacted with the wireless receiving module (502), so that the stop valve body (501) is in wireless communication connection with the alarm main control board (201).
9. The safety gas appliance according to claim 8, wherein: the cut-off valve module (5) further comprises a power supply module (503) for supplying power to the wireless receiving module (502), and a voltage boosting circuit (504) for boosting voltage; the wireless receiving module (502) is electrically connected with the power supply module (503), and the boosting circuit (504) is electrically connected between the wireless receiving module (502) and the stop valve body (501).
10. The safety gas appliance according to claim 6, characterized in that: stop valve module (5) include stop valve body (501), alarm main control board (201) wired communication is connected stop valve body (501).
CN202210817092.7A 2022-07-12 2022-07-12 Incremental gas detection method and safe gas equipment thereof Pending CN115100824A (en)

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CN202210817092.7A CN115100824A (en) 2022-07-12 2022-07-12 Incremental gas detection method and safe gas equipment thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210817092.7A CN115100824A (en) 2022-07-12 2022-07-12 Incremental gas detection method and safe gas equipment thereof

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Publication Number Publication Date
CN115100824A true CN115100824A (en) 2022-09-23

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CN202210817092.7A Pending CN115100824A (en) 2022-07-12 2022-07-12 Incremental gas detection method and safe gas equipment thereof

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Country Link
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