CN106910316B - A kind of gas leakage long-distance monitorng device - Google Patents

A kind of gas leakage long-distance monitorng device Download PDF

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Publication number
CN106910316B
CN106910316B CN201710234678.XA CN201710234678A CN106910316B CN 106910316 B CN106910316 B CN 106910316B CN 201710234678 A CN201710234678 A CN 201710234678A CN 106910316 B CN106910316 B CN 106910316B
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China
Prior art keywords
gas
gas leakage
closing
controller
gas valve
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Active
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CN201710234678.XA
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CN106910316A (en
Inventor
王自力
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Shenzhen Tai Chi Intelligent Technology Co Ltd
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Shenzhen Tai Chi Intelligent Technology Co Ltd
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Priority to CN201710234678.XA priority Critical patent/CN106910316B/en
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Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00Alarms responsive to a single specified undesired or abnormal operating condition and not elsewhere provided for
    • G08B21/02Alarms for ensuring the safety of persons
    • G08B21/12Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
    • G08B21/16Combustible gas alarms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/046Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0091For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters

Abstract

The invention belongs to supervisory control for gas leak technical fields, and in particular to a kind of gas leakage long-distance monitorng device, including several gas leakage detection devices and gas valve controller for opening and closing;Gas leakage detection device includes sensor measuring module and gas leakage data transmission module;Gas valve controller for opening and closing includes ontology and is set to intrinsic Gas controller, gas valve opening and closing executing agency and combustion gas data transmission module;Ontology is fixed in fuel gas conduit by support arm;Gas valve opening and closing executing agency includes being fixedly installed on intrinsic drive module, drive module connects retarder, the output shaft of retarder is pierced by ontology towards fuel gas conduit, and output shaft axial line is identical as the rotation centerline of gas valve, and the rotating arm matched with gas valve is fixed on output shaft.The present invention has the advantages that can be in gas leakage, automatic self-closing gas valve, and gas leakage and gas valve opening and closing situation can be remotely sent to the user terminal.

Description

A kind of gas leakage long-distance monitorng device
Technical field
The invention belongs to supervisory control for gas leak technical fields, and in particular to a kind of gas leakage long-distance monitorng device.
Background technique
In the epoch of current economic rapid development, each supply station, industrial premises, hotel and domestic consumer etc. use combustion gas The demand of safety is all higher and higher, and safety precaution and alarm system are to ensure that safe one of particularly important approach, while It is the important component of digitized home.
Existing gas alarm and automatic closing system are usually that acousto-optic is issued after the case where having detected gas leakage Warning message, and automatically cut off the gas valve being mounted in gas pipeline.The system can prevent fire to a certain extent Occur, it, will not someone always however, certain places (such as family kitchen, industrial premises etc.) for belonging to people's cyclic activity It is stay-at-home.For such place, when there is gas leakage to happen, even if there is warning message, user will not be in a short time Know concrete condition, therefore effective fire prevention measure cannot be taken within the optimal reaction time.Although gas valve is automatically closed, But if any measure is not taken in long-time, very big fire hazard is still suffered from, the person and property of people are seriously threatened Safety.
Summary of the invention
The object of the present invention is to provide a kind of gas leakage long-distance monitorng devices, and structure is simple, easy for installation, are not required to pair Existing gas pipeline is transformed, it is only necessary to install the device, it will be able in gas leakage, automatic self-closing gas valve, and Gas leakage and gas valve opening and closing situation can be remotely sent to the user terminal.
A kind of gas leakage long-distance monitorng device, including several gas leakage detection devices and gas valve open and close control dress It sets;The gas leakage detection device includes sensor measuring module and gas leakage data transmission module;The sensor measuring mould Block and the gas leakage data transmission module are electrically connected;The gas valve controller for opening and closing includes ontology and is set to Intrinsic Gas controller, gas valve opening and closing executing agency and combustion gas data transmission module;The gas leakage data transmission Module and the Gas controller are wireless or wire communication is connect;The Gas controller and the gas valve are opened and closed execution machine Structure, the combustion gas data transmission module are electrically connected;
The gas leakage detection device is set in specific position;The gas leakage detection gas leakage feelings Condition simultaneously generates corresponding signal and is sent to the Gas controller;The Gas controller controls the gas valve and is opened and closed execution machine Structure work;The Gas controller is controlled the phase of gas valve opening and closing executing agency work by the combustion gas data transmission module It closes information and is sent to user terminal;
The ontology is fixed in fuel gas conduit by support arm;Gas valve opening and closing executing agency includes being fixedly installed on institute Intrinsic drive module is stated, the drive module connects retarder, and the output shaft of the retarder is worn towards the fuel gas conduit Ontology out, the output shaft axial line is identical as the rotation centerline of gas valve, is fixed on the output shaft and the combustion Air valve is towards rotating arm that is identical and matching with the gas valve.
Preferably, the sensor measuring module includes gas security and/or flame detector;The gas security packet Include methane transducer, CO sensor and smoke sensor device it is any or combination;The flame detector includes ultraviolet light detector, red Outer optical detector is any or combines.
Preferably, the gas leakage data transmission module and the Gas controller are wireless or wired connection communicates, Wireless telecommunications connection includes bluetooth, 2.4G, 3G, 4G and 5G, NFC antenna, 315MHz, 433MHz, 868MHz and ZigBee communication Mode.
Preferably, the data between the data transmission module and user terminal are transmitted through Wifi or Zigbee.
Preferably, the drive module includes that stepper motor and brushless motor are any.
Preferably, the output shaft free end is equipped with screw thread, and the rotating arm is equipped with through-hole, and the rotating arm passes through institute It states through-hole to be set on the output shaft, and is screwed the rotating arm on the output shaft described in nut screw-in.
Preferably, the support arm is equipped with the first rack gear close to the ontology side, on the ontology with first rack gear Opposite side is equipped with the second rack gear, and first rack gear and second rack gear cooperate;The second rack gear interposition It sets hollow out and forms through-hole item, several screws pass through the support arm and the through-hole item, and are resisted against institute on the inside of the ontology The latch segment at through-hole position is stated to match.
Preferably, the support arm close to fuel gas conduit one end be equipped with bent clasp, the clasp free end by screw with The clasp other end is fixed to each other.
Preferably, the support arm uses flexible material or metal material.
Preferably, the Gas controller has power module;The power module includes that rechargeable battery, power supply connect Mouth, powering mode switching circuit, circuit of three-terminal voltage-stabilizing integrated, bridge rectifier and voltage regulator circuit.
The present invention has the advantages that its structure is simple, and it is easy for installation, it is not required to be transformed existing gas pipeline, only Need to install the device, it will be able in gas leakage, automatic self-closing gas valve, and gas leakage and gas valve can be opened and closed Situation is remotely sent to the user terminal.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the present invention, for this field For those of ordinary skill, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of gas valve opening and closing controling device structure diagram of the present invention.
Fig. 2 is support arm structure schematic diagram of the present invention.
Fig. 3 is body exterior structural schematic diagram of the present invention.
Fig. 4 is body interior structural schematic diagram of the present invention.
Fig. 5 is drive module driving rotating arm rotational structure schematic diagram of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that specific embodiment described herein only to explain the present invention, not For limiting the present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element On one element or it may be simultaneously present centering elements.When an element is known as " being connected to " another element, it can To be directly to another element or may be simultaneously present centering elements.
The embodiment of the present invention one, including several gas leakage detection devices and gas valve controller for opening and closing;The combustion Gas leakage detection device includes sensor measuring module and gas leakage data transmission module;The sensor measuring module and the combustion Gas leakage data transmission module is electrically connected;The gas valve controller for opening and closing includes ontology and is set to intrinsic combustion Airgun controller, gas valve opening and closing executing agency and combustion gas data transmission module;The gas leakage data transmission module with it is described Gas controller is wireless or wire communication connection;The Gas controller and the gas valve are opened and closed executing agency, the combustion Gas data transmission module is electrically connected.
The gas leakage detection device is set in specific position;The gas leakage detection gas leakage feelings Condition simultaneously generates corresponding signal and is sent to the Gas controller;The Gas controller controls the gas valve and is opened and closed execution machine Structure work;The Gas controller is controlled the phase of gas valve opening and closing executing agency work by the combustion gas data transmission module It closes information and is sent to user terminal.
As shown in Figure 1 and Figure 5, the ontology 101 is fixed in fuel gas conduit 200 by support arm 102;The gas valve opening and closing Executing agency 100 includes the drive module 103 being fixedly installed in the ontology 101, and the drive module 103 connects retarder 104, the output shaft of the retarder 104 is pierced by ontology 101, the output shaft axial line and combustion gas towards the fuel gas conduit 200 The rotation centerline of valve 300 is identical, be fixed on the output shaft with the gas valve 300 towards it is identical and with the combustion gas The rotating arm 105 that valve 300 matches.
In the present invention, rotating arm free end two sides are equipped with the convex edge extended towards gas valve, and gas valve is stuck between convex edge. Rotating arm rotates under the drive of drive module, so that gas valve be driven to switch.
In the present invention, the sensor measuring module includes gas security and/or flame detector;The gas security Including methane transducer, CO sensor and smoke sensor device it is any or combination;The flame detector include ultraviolet light detector, Infrared detector is any or combines.
In the present invention, the gas leakage data transmission module and Gas controller is wireless or wired connection is logical News, wireless telecommunications connection are logical including bluetooth, 2.4G, 3G, 4G and 5G, NFC antenna, 315MHz, 433MHz, 868MHz and ZigBee News mode
In the present invention, the data between the data transmission module and user terminal are transmitted through Wifi or Zigbee.
In the present invention, the drive module includes that stepper motor and brushless motor are any.
In the present invention, the output shaft free end is equipped with screw thread, and the rotating arm is equipped with through-hole, and the rotating arm passes through The through-hole is set on the output shaft, and is screwed the rotating arm on the output shaft described in nut screw-in.This The mode of the fixed rotating arm of kind is simple and convenient.
Rotating arm can also be fixed on output shaft free end by mechanical connection manners such as rivet, buckle or welding.
As shown in Figures 1 to 4, the support arm 102 close to 101 side of ontology be equipped with the first rack gear 1021, described The side opposite with first rack gear 1021 is equipped with the second rack gear 1011 on body 101, first rack gear 1011 and described the Two rack gears 1021 cooperate;Second rack gear, the 1011 middle position hollow out forms through-hole item 1012, several screws pass through The support arm 102 and the through-hole item 1012, with the institute being resisted against at 101 inside 1012 position of through-hole item of ontology Latch segment is stated to match.The latch segment is located in the groove body 1013 of 101 inside of ontology.By adjusting first rack gear With the installation site of the adjustable gas valve controller for opening and closing of cooperation position of second rack gear so that rotating arm just position Above gas valve, fixed convenient for gas valve and rotating arm.That is, by the cooperation position for adjusting the first rack gear and the second rack gear, The height of support arm can freely be adjusted.Screw fixed locking block can also be replaced with eccentric handle.
As depicted in figs. 1 and 2, the support arm 102 is equipped with bent clasp 1022, the button close to 200 one end of fuel gas conduit Hook free end is fixed to each other by screw and the clasp other end.Clasp is buckled in fuel gas conduit by bending mode, is then led to Screw is crossed to fix.Certainly, the support arm is also designed to be open close to fuel gas conduit one end, the two semicircular opening sheet package of formation Firmly fuel gas conduit, two semicircular opening sheet free end are fixed by screw.
The support arm uses flexible material or metal material.With fuel gas conduit lock portion can also with flexible material or The movable accessory of person's metal material is mechanically fixed by screw, buckle, easily lock etc..
Gas leakage remote monitoring system of the invention, on the one hand, Gas controller can be according to gas leakage detection device The detectable signal of transmission sends out code to gas valve opening and closing executing agency, so that being opened and closed executing agency by gas valve makes to fire Air valve is closed, and then cuts off fuel gas transmission path, and combustion gas is avoided further to leak;On the other hand, Gas controller can be to combustion gas Data transmission module sends detectable signal and out code, to will include gas leakage feelings by combustion gas data transmission module The combustion gas report information of condition and gas valve opening and closing situation is sent to the user terminal bound in advance with it, to allow users to i.e. Know combustion gas report information quarter, and takes specific effective remedial measure immediately.Gas leakage remote monitoring system of the invention The combination that combustion gas report information these two aspects is remotely sent by automatic self-closing gas valve and to user terminal, almost can be complete Safety accident caused by preventing because of gas leakage, ensure that the person and property safety of people to the full extent.
Since gas leakage remote monitoring system of the invention includes that the combustion gas data connecting with Gas controller transmit mould Block, therefore, the detectable signal that Gas controller receives and its out code based on detectable signal generation can be first sent to Combustion gas data transmission module, then one or more user terminals, such as mobile phone, intelligence are sent to by combustion gas data transmission module Wrist-watch, plate, computer or other electronic equipments reduce the transmission pressure of Gas controller;Meanwhile one or more users are whole The control instruction signal that end returns can first be sent to combustion gas data transmission module, control of the combustion gas data transmission module further according to return Command signal processed opens or closes instruction accordingly to Gas controller transmission, to reduce the access pressure of Gas controller With data processing pressure.Thereby, it is possible to avoid Gas controller because transmit pressure, access pressure or data processing pressure it is excessive due to There are crash, signal transmitting and receiving lag or other abnormalities, ensure that gas valve opening and closing executing agency executes and close and/or beat The movement accuracy for opening gas valve, further avoids the generation of safety accident.
Gas leakage detection device is configured to the gas leakage situation of detection setting position, to generate detectable signal.This sets Positioning is set to any data collection point for being easy to produce gas leakage that user determines according to practical situations, such as works as combustion gas When leakage remote monitoring system is applied to family kitchen, the setting position can for kitchen ceiling, neighbouring gas-cooker wall, Fuel gas transportation pipeline end etc. is easy to happen the position of gas leakage.
Gas controller is connect with gas leakage detection device, and is configured to the spy generated according to gas leakage detection device It surveys signal and sends corresponding out code to gas valve opening and closing executing agency.Specifically, Gas controller receives sensor measuring After the detectable signal that device is sent, it can will determine after information that the detectable signal is characterized and the information comparative analysis stored in it Whether out code is generated.The information stored in it for example can include but is not limited to a preset gas concentration threshold value and one in advance If flame luminance threshold.
Gas valve opening and closing executing agency connect with Gas controller, and is configured to refer to according to the closing that Gas controller is sent Order closes gas valve.Specifically, Gas controller can be connected with gas valve opening and closing executing agency by electric lead, combustion gas control The out code that device is sent for example can be level signal.
Each gas security is configured to detect the gas concentration on its installation site periphery, is used to indicate its peace to generate The signal of gas concentration around holding position.Each flame detector is configured to detect the flame brightness on its installation site periphery, To generate the signal for the flame brightness being used to indicate around its installation site.That is, gas leakage detection device issues Detectable signal can for gas security generate the signal for being used to indicate gas concentration and/or flame detector generate use In the signal of instruction flame brightness.
In the present invention, Gas controller, each gas security and each flame detector all have human-computer interaction device, The human-computer interaction device include battery capacity indication lamp, wireless signal indicator light, working station indicator, be wirelessly connected setting key, One of switch key is a variety of.Specifically, Gas controller may include battery capacity indication lamp, wireless signal indicator light, work Status indicator lamp opens key, closes key and is wirelessly connected setting key.It opens key and closing key can be respectively for user hand Gas valve is opened and closed dynamicly, is wirelessly connected setting key and is matched for realizing Gas controller with combustion gas data transmission device It is right.Gas security may include battery capacity indication lamp, wireless signal indicator light and working station indicator.Flame detector may include Battery capacity indication lamp, wireless signal indicator light and working station indicator.
Gas controller also has power module, which includes that rechargeable battery, power interface, powering mode are cut Change circuit, circuit of three-terminal voltage-stabilizing integrated, bridge rectifier and voltage regulator circuit.Specifically, Gas controller can there are two types of supply Power mode, one is rechargeable battery is used, which is specifically as follows lithium battery;Another kind is to pass through power interface Alternating current is accessed, which can be converted to line voltage the voltage of size required for Gas controller.Powering mode switching Circuit is used to control the switching between above two powering mode.
In the present invention, combustion gas data transmission module is configured to obtain the control instruction signal returned by user terminal, combustion Airgun controller, which is configured to be sent according to control instruction signal to gas valve opening and closing executing agency, opens or closes instruction accordingly, Gas valve opening and closing executing agency is configured to open or close gas valve according to opening and/or out code.That is, combustion Gas data transmission module can also receive the control instruction signal of user terminal return, such as be used to indicate and open gas valve or use In the control instruction signal of instruction closing gas valve.When Gas controller fails the detectable signal sent according to sensor measuring device When issuing the control instruction for being used for closing gas valve in time, user can return according to the combustion gas report information that user terminal receives It is back to the control instruction signal of instruction closing gas valve.Or user can also actively send out according to actual needs and be used to indicate Open the control instruction signal of gas valve.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (8)

1. a kind of gas leakage long-distance monitorng device, which is characterized in that including several gas leakage detection devices and gas valve Controller for opening and closing;The gas leakage detection device includes sensor measuring module and gas leakage data transmission module;It is described Sensor measuring module and the gas leakage data transmission module are electrically connected;The gas valve controller for opening and closing includes ontology And it is set to intrinsic Gas controller, gas valve opening and closing executing agency and combustion gas data transmission module;The combustion gas is let out Leakage data transmission module and the Gas controller are wirelessly or wire communication is connect;The Gas controller and the gas valve It is opened and closed executing agency, the combustion gas data transmission module is electrically connected;
The gas leakage detection gas leakage situation simultaneously generates corresponding signal and is sent to the Gas controller; The Gas controller controls the work of gas valve opening and closing executing agency;The combustion gas data transmission module is by the combustion gas control The relevant information that device processed controls the work of gas valve opening and closing executing agency is sent to user terminal;
The ontology is fixed in fuel gas conduit by support arm;Gas valve opening and closing executing agency includes being fixedly installed on described Intracorporal drive module, the drive module connect retarder, and the output shaft of the retarder is pierced by this towards the fuel gas conduit Body, the output shaft axial line is identical as the rotation centerline of gas valve, is fixed on the output shaft and the gas valve Towards rotating arm that is identical and being matched with the gas valve;
The support arm is equipped with the first rack gear close to the ontology side, and the side opposite with first rack gear is set on the ontology There is the second rack gear, first rack gear and second rack gear cooperate;Second rack gear middle position hollow out forms logical Hole item, several screws pass through the support arm and the through-hole item, and are resisted against the through-hole position on the inside of the ontology The latch segment at place matches, and the latch segment is located in the groove body on the inside of the ontology.
2. a kind of gas leakage long-distance monitorng device according to claim 1, which is characterized in that the sensor measuring module Including gas security and/or flame detector;The gas security includes methane transducer, CO sensor and smog sensing Have a high regard for one or combination;The flame detector includes ultraviolet light detector, infrared detector is any or combines.
3. a kind of gas leakage long-distance monitorng device according to claim 1, which is characterized in that the data transmission module Data between user terminal are transmitted through WiFi or Zigbee.
4. a kind of gas leakage long-distance monitorng device according to claim 1, which is characterized in that the drive module includes Stepper motor and brushless motor are any.
5. a kind of gas leakage long-distance monitorng device according to claim 1, which is characterized in that the output shaft free end Equipped with screw thread, the rotating arm is equipped with through-hole, and the rotating arm passes through on through-hole suit and the output shaft, and nut The rotating arm is screwed described in screw-in on the output shaft.
6. a kind of gas leakage long-distance monitorng device according to claim 1, which is characterized in that the support arm is close to combustion gas Pipe one end is equipped with bent clasp, and the clasp free end is fixed to each other by screw and the clasp other end.
7. a kind of gas leakage long-distance monitorng device according to claim 6, which is characterized in that the support arm is using flexible Material or metal material.
8. a kind of gas leakage long-distance monitorng device according to claim 1, which is characterized in that the Gas controller tool There is power module;The power module includes that rechargeable battery, power interface, powering mode switching circuit, three-terminal voltage-stabilizing are integrated Circuit, bridge rectifier and voltage regulator circuit.
CN201710234678.XA 2017-04-12 2017-04-12 A kind of gas leakage long-distance monitorng device Active CN106910316B (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108386725A (en) * 2018-02-06 2018-08-10 无锡先迪德宝电子有限公司 A kind of gas leakage automatic detection alarm device
CN109027353A (en) * 2018-07-19 2018-12-18 广东好桦家家居科技有限公司 One kind can long-range turn out the gas system and its control method
CN109188958A (en) * 2018-08-21 2019-01-11 贝飞云 A kind of kitchen fuel gas leakage control device
CN110529656A (en) * 2019-08-28 2019-12-03 深圳沁鑫科技有限公司 Wireless control method, system and the computer equipment of electromagnetic valve switch

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Publication number Priority date Publication date Assignee Title
CN2225585Y (en) * 1994-08-04 1996-04-24 竺伟国 Closing device for gas valve
CN1587769A (en) * 2004-09-01 2005-03-02 邱柏康 Liquefied gas leakage electric open and close device
CN204512635U (en) * 2015-01-05 2015-07-29 苏州思迪信息技术有限公司 Gas valve automatic detection alarm device
CN205247573U (en) * 2015-12-24 2016-05-18 王自力 Remote monitering system is leaked in gas
CN205371753U (en) * 2015-12-30 2016-07-06 广东佳居乐厨房科技有限公司 Intelligence coal gas valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2225585Y (en) * 1994-08-04 1996-04-24 竺伟国 Closing device for gas valve
CN1587769A (en) * 2004-09-01 2005-03-02 邱柏康 Liquefied gas leakage electric open and close device
CN204512635U (en) * 2015-01-05 2015-07-29 苏州思迪信息技术有限公司 Gas valve automatic detection alarm device
CN205247573U (en) * 2015-12-24 2016-05-18 王自力 Remote monitering system is leaked in gas
CN205371753U (en) * 2015-12-30 2016-07-06 广东佳居乐厨房科技有限公司 Intelligence coal gas valve

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