Dual safety flameout protection system for cooking range

Abstract

The utility model discloses a dual safety flameout protection system for a cooking range, which comprises a cooking bench, a cooking range is fixedly mounted on the cooking bench, an ignition needle and a thermocouple flame probe are respectively and fixedly mounted on the cooking range, a gas pipe for conveying gas to the cooking range is mounted on the cooking bench, and an electromagnetic valve and a flow sensor are respectively mounted on the gas pipe. A horn and a controller are fixedly installed on the inner side of the cooking bench, and the controller is electrically connected with the flow sensor and the thermocouple flame probe. The thermocouple type flame-out protection device is combined with the flow sensor, the horn and the controller, double safety protection is formed, once flames are extinguished, gas supply is cut off through the electromagnetic valve, meanwhile, the flow sensor monitors the gas flow, and when a thermocouple flame probe detects that the flames are extinguished, the gas supply is cut off through the horn. However, when the flow sensor monitors that the fuel gas is still conveyed, the controller controls the loudspeaker to give an alarm prompt to remind a person to manually close the fuel gas in time, and fuel gas leakage is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the range, in particular to a double security flameout protection system of the range. BACKGROUND

[0002] The thermocouple type flameout protection device has the characteristics that when it is heated, a thermoelectric potential is generated. By using this characteristic, various protection devices can be formed. The thermocouple type flameout protection device includes a thermocouple and a solenoid valve, so it is also called a magnetic control safety valve, which is a kind of flameout protection device more used in modern gas appliances. The magnetic control safety valve uses a thermocouple as a heat-sensitive element. The thermocouple is placed in the flame range of a small burner or a main burner. When the thermocouple is heated, the free electrons in the two different metals accept heat energy, and the movement is intensified to form a thermoelectric potential, which is a heat-to-electricity conversion process. The potential generated by the thermocouple is connected to the coil of the solenoid valve, generating a magnetic field to make the solenoid valve act, the gas valve opens, the gas in the main gas passage is conducted, and the main burner burns normally. Once the flame detected by the thermocouple is extinguished, the potential at the end of the thermocouple lead drops to zero quickly, the magnetic control valve coil loses power, and under the action of the spring, it quickly resets, and the valve gasket seals the gas source channel to stop the gas supply.

[0003] Although the thermocouple type flameout protection device arranged on the cooking bench can prevent gas leakage to some extent, the protection means is single and cannot meet the complex and changeable kitchen environment. Moreover, the protection of the ignition needle and the flame probe is often neglected during use. In actual use, the ignition needle and the flame probe are directly exposed to the outside. During cooking or cleaning, the ignition needle and the flame probe may be damaged due to collision, so that the flameout protection device does not work, leading to gas leakage and safety problems.

[0004] A protection assembly for protecting a gas flameout protection device is disclosed in Chinese Patent No. CN219809941U, which includes a burner head of a gas stove, an ignition needle, and a flameout protection needle. The ignition needle and the flameout protection needle are installed on the left and right sides of the burner head, respectively. A first protection bracket is arranged on the flameout protection needle to protect the flameout protection needle and prevent the needle from being accidentally damaged by the user of the gas stove, which may not be discovered or replaced in time, causing the flameout protection device to malfunction and leading to gas leakage. The safety is improved.

[0005] However, the above-mentioned protection bracket is directly fixed on the burner head, and it is not convenient to replace the protection bracket when it is damaged or aged.

[0006] Therefore, a double security flameout protection system of the range is proposed. UTILITY MODEL CONTENTS

[0007] The utility model discloses a stove double safety flameout protection system, which solves or at least alleviates one or more of the above problems and other problems in the prior art.

[0008] In order to achieve the above purpose, the utility model adopts the main technical scheme including:

[0009] A stove double safety flameout protection system, which solves or at least alleviates one or more of the above problems and other problems in the prior art.

[0010] The ignition needle and the hot-wire flame probe are both sleeved with a protection frame, and the protection frame is detachably installed on the stove head through a detachable piece.

[0011] In the stove double safety flameout protection system according to the utility model, the protection frame includes an annular plate, and a plurality of protection rods are fixedly connected to the top of the annular plate.

[0012] In the stove double safety flameout protection system according to the utility model, the detachable piece includes a plurality of arc-shaped plug blocks, the arc-shaped plug blocks are fixedly connected to the bottom of the annular plate in an equidistant annular array, an arc-shaped insertion hole corresponding to the arc-shaped plug blocks is formed in the stove head, the lower end of the arc-shaped plug block extends to below the stove head after penetrating through the arc-shaped insertion hole, an outer thread is formed in the outer wall of the arc-shaped plug block, and a nut is threadedly fixed to the lower end of the arc-shaped plug block.

[0013] In the stove double safety flameout protection system according to the utility model, the outer wall of the nut is fixedly connected with a handle.

[0014] In the stove double safety flameout protection system according to the utility model, a wire passing gap is formed in the nut.

[0015] In the double safety flameout protection system of a stove according to the utility model, the dismounting piece comprises a plurality of L-shaped elastic sheets, one end of the L-shaped elastic sheet is fixedly connected with the side surface of the annular plate, a reverse U-shaped seat corresponding to the L-shaped elastic sheet is fixedly connected on the stove head, a limiting protrusion is formed on the top of the end of the L-shaped elastic sheet away from the annular plate, and the limiting protrusion can be clamped on the reverse U-shaped seat after the end of the L-shaped elastic sheet away from the annular plate penetrates through the inner side of the reverse U-shaped seat.

[0016] In the double safety flameout protection system of a stove according to the utility model, a guide inclined surface is formed on the top of the limiting protrusion.

[0017] The utility model has at least the following beneficial effects:

[0018] The utility model combines the thermocouple type flameout protection device and the flow sensor, forms double safety protection, the thermocouple flame probe monitors the flame state in real time, and immediately cuts off the gas supply through the electromagnetic valve once the flame is extinguished. Meanwhile, the flow sensor monitors the gas flow, and when the thermocouple flame probe detects that the flame is extinguished but the flow sensor monitors that the gas is still being delivered, the controller controls the loudspeaker to give an alarm prompt, timely reminding personnel to manually close, effectively preventing gas leakage.

[0019] The ignition needle and the thermocouple flame probe are both sleeved with protective frames, and the dismounting piece is detachably installed on the stove head, which facilitates quick replacement when the protective frame is damaged or aged, reduces the maintenance cost, improves the durability of the system, the dismounting piece adopts the arc-shaped plug block combined with the nut or the L-shaped elastic sheet cooperated with the reverse U-shaped seat, so that the dismounting of the protective frame is more flexible and convenient, the arc-shaped plug block is fixed through the external thread and the nut, and is easy to install and dismount; the L-shaped elastic sheet realizes quick clamping through elastic deformation, and is also convenient to operate.

[0020] The wire passing gap formed on the nut ensures that the wire of the thermocouple flame probe can smoothly pass through, does not affect the installation and dismounting of the protective frame, and maintains the neatness and beauty of the system. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a structure schematic view of the double safety flameout protection system of a stove of the utility model;

[0023] Figure 2 It is a structure schematic view of the stove head of the utility model;

[0024] Figure 3 This is the second schematic diagram of the stove head structure of this utility model;

[0025] Figure 4 This is an exploded structural diagram of the nut and arc-shaped insert of this utility model;

[0026] Figure 5 This is the third schematic diagram of the stove head structure of this utility model;

[0027] Figure 6 for Figure 5 A magnified structural diagram of part A in the diagram;

[0028] Figure 7 This is a schematic diagram of the structure of the protective frame of this utility model;

[0029] Figure 8 for Figure 7 A magnified structural diagram of part B in the diagram.

[0030] Explanation of icon numbers:

[0031] 1. Stovetop; 2. Stove head; 201. Arc-shaped socket; 3. Gas pipe; 4. Solenoid valve; 5. Flow sensor; 6. Horn; 7. Controller; 8. Ignition needle; 9. Thermocouple flame probe; 10. Annular plate; 1001. Protective rod; 1002. Arc-shaped insert; 1003. External thread; 1004. Nut; 1005. Handle; 1006. Wire notch; 1007. L-shaped elastic sheet; 10071. Limiting protrusion; 10072. Guide slope; 1008. Inverted U-shaped seat. Detailed Implementation

[0032] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0033] Example 1

[0034] Please refer to Figures 1 to 8 As shown, the dual-safety flameout protection system for stoves provided in this embodiment includes a stove platform 1, a burner head 2 fixedly installed on the stove platform 1, an ignition needle 8 and a thermocouple flame probe 9 fixedly installed on the burner head 2, a gas pipe 3 for supplying gas to the burner head 2 installed on the stove platform 1, a solenoid valve 4 and a flow sensor 5 installed on the gas pipe 3, the thermocouple flame probe 9 being electrically connected to the solenoid valve 4, a horn 6 and a controller 7 fixedly installed on the inner side of the stove platform 1, the controller 7 being electrically connected to the flow sensor 5 and the thermocouple flame probe 9, and the horn 6 being controlled by the controller 7.

[0035] The thermocouple flame probe 9 monitors the flame state in real time, and once the flame is extinguished, the electromagnetic valve 4 is immediately closed to cut off the gas supply. At the same time, the flow sensor 5 monitors the gas flow, and when the thermocouple flame probe 9 detects that the flame is extinguished but the flow sensor 5 monitors that the gas is still being delivered, the controller 7 controls the horn 6 to sound an alarm to remind personnel to manually close in a timely manner, effectively preventing gas leakage.

[0036] The controller 7 in this embodiment can use a DSP controller with model TMS320F2812.

[0037] The flow sensor 5 can be an AWM series gas mass flow sensor, which is widely used in gas equipment and has high precision and fast response. The AWM series sensor uses a hot film principle and is suitable for measuring the mass flow of gas, with good stability and reliability.

[0038] The thermocouple flame probe 9 can use a K-type thermocouple, which is a widely used standard thermocouple type suitable for various industrial temperature measurement applications. The K-type thermocouple has a wide operating temperature range (about -200℃ to 1200℃), fast response speed, low cost, and is easy to obtain.

[0039] The above specific models are not limited here, as long as they meet the functions of this embodiment.

[0040] In this embodiment, protective frames are provided on the ignition needle 8 and the thermocouple flame probe 9, and the protective frames are detachably installed on the cooktop 2 through dismounting pieces;

[0041] The protective frame includes a ring plate 10, and a plurality of protective rods 1001 are fixedly connected to the top of the ring plate 10, and the plurality of protective rods 1001 are arranged in an equidistant annular array.

[0042] In this embodiment, the dismounting pieces include a plurality of arc-shaped insertion blocks 1002, which are fixedly connected to the bottom of the ring plate 10 in an equidistant annular array, and the cooktop 2 is provided with arc-shaped insertion holes 201 corresponding to the arc-shaped insertion blocks 1002. The lower end of the arc-shaped insertion block 1002 extends to the lower side of the cooktop 2 after penetrating through the arc-shaped insertion hole 201, and the outer wall of the arc-shaped insertion block 1002 is provided with external threads 1003. The nut 1004 is threadedly fixed to the lower end of the arc-shaped insertion block 1002. Through this arrangement, when installing, the ring plate 10 is sleeved on the thermocouple flame probe 9 or the ignition needle 8, then the lower end of the arc-shaped insertion block 1002 is inserted into the arc-shaped insertion hole 201, and then the nut 1004 is threadedly fixed to the lower end of the arc-shaped insertion block 1002. When dismounting, only the nut 1004 needs to be unscrewed, and the ring plate 10 can be removed from the cooktop 2.

[0043] In this embodiment, in order to not affect the lead wires of the thermocouple flame probe 9 and the ignition needle 8 during installation, a wire passing notch 1006 is formed on the nut 1004.

[0044] In order to facilitate the screwing of the nut 1004, a handle 1005 is fixedly connected to the outer wall of the nut 1004.

[0045] Embodiment 2

[0046] The difference between this embodiment and embodiment 1 is that the dismounting part includes a plurality of L-shaped elastic sheets 1007, one end of the L-shaped elastic sheet 1007 is fixedly connected to the side surface of the annular plate 10, a reverse U-shaped seat 1008 corresponding to the L-shaped elastic sheet 1007 is fixedly connected to the cooktop 2, a limiting protrusion 10071 is formed on the top of the end of the L-shaped elastic sheet 1007 away from the annular plate 10, and the limiting protrusion 10071 can be clamped on the reverse U-shaped seat 1008 after the end of the L-shaped elastic sheet 1007 away from the annular plate 10 penetrates the inner side of the reverse U-shaped seat 1008. Through the above setting, when the annular plate 10 is installed, the annular plate 10 is sleeved on the thermocouple flame probe 9 or the ignition needle 8, then the annular plate 10 is rotated, so that the limiting protrusion 10071 penetrates out of the inner side of the reverse U-shaped seat 1008, then the limiting protrusion 10071 is clamped on the reverse U-shaped seat 1008 under the elastic force of the L-shaped elastic sheet 1007, when the annular plate 10 needs to be dismounted, the limiting protrusion 10071 is only pressed downward, so that the top of the limiting protrusion 10071 is lower than the inner top of the reverse U-shaped seat 1008, then the annular plate 10 is reversely rotated.

[0047] In order to facilitate installation, a guide inclined surface 10072 is formed on the top of the limiting protrusion 10071.

[0048] In some embodiments, the ignition needle 8 and the detection circuit of the thermocouple flame probe 9 are isolated, the high-voltage pack secondary coil of the ignition needle 8 is changed to one end grounded and one end generating high voltage (in the previous high-voltage pack, both terminals are discharged), the distance between the two ports is increased from the original 18mm to 36mm, and the high-voltage pack is changed from a split groove winding method to a layered winding method, so that the ignition needle 8 is far away or damaged, and the pulse high voltage can be discharged between the layers of the high-voltage pack without damaging the flameout protection detection circuit and causing high-voltage leakage of the stove, making the customer use safer, changing the traditional flameout protection of the commercial stove, which causes the pulse high voltage to damage the detection circuit and causes the flameout protection to malfunction due to the ignition needle being far away or damaged, prolonging the service life of the flameout protection and reducing maintenance.

[0049] The above description shows and describes several preferred embodiments of the present application, but as previously described, it should be understood that the present application is not limited to the forms disclosed herein, and should not be considered as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application conceived herein, by the above teachings or related art or knowledge. Any modification and change made by those skilled in the art without departing from the spirit and scope of the present application shall be within the protection scope of the claims of the present application.

Claims

1. A dual-safety flameout protection system for stoves, characterized in that, The utility model relates to a gas stove, including stove (1), stove (1) is fixedly installed with stove head (2), the stove head (2) is fixedly installed with ignition needle (8) and thermocouple flame probe (9) respectively, the stove (1) is installed with the gas pipe (3) for conveying gas to stove head (2), the gas pipe (3) is installed with solenoid valve (4) and flow sensor (5) respectively, thermocouple flame probe (9) is electrically connected with solenoid valve (4), the inner side of stove (1) is fixedly installed with horn (6) and controller (7), the controller (7) is electrically connected with flow sensor (5) and thermocouple flame probe (9) respectively, horn (6) is controlled to controller (7). The ignition needle (8) and the thermocouple flame probe (9) are provided with a protective frame, and the protective frame is detachably installed on the stove head (2) through a detachable part.

2. A dual safety flame failure protection system for a cooking appliance as claimed in claim 1 wherein: The protective frame includes a ring-shaped plate (10), and a plurality of protective rods (1001) are fixedly connected to the top of the ring-shaped plate (10) in an equidistant ring-shaped array.

3. A dual safety flame failure protection system for a cooktop as claimed in claim 2, wherein: The detachable part includes a plurality of arc-shaped insertion blocks (1002) fixedly connected to the bottom of the ring-shaped plate (10) in an equidistant ring-shaped array, and an arc-shaped insertion hole (201) corresponding to the arc-shaped insertion block (1002) is formed in the stove head (2). The lower end of the arc-shaped insertion block (1002) extends below the stove head (2) after penetrating through the arc-shaped insertion hole (201), and an external thread (1003) is formed in the outer wall of the arc-shaped insertion block (1002). A nut (1004) is threadedly fixed to the lower end of the arc-shaped insertion block (1002).

4. A dual safety flame failure protection system for a cooktop as claimed in claim 3, wherein: The outer wall of the nut (1004) is fixedly connected with a handle (1005).

5. A dual safety flame failure protection system for a cooking appliance as claimed in claim 4 wherein: A wire passing notch (1006) is formed in the nut (1004).

6. A dual safety flame failure protection system for a cooktop as defined in claim 2, wherein: The detachable part includes a plurality of L-shaped elastic sheets (1007), one end of the L-shaped elastic sheet (1007) is fixedly connected to the side surface of the ring-shaped plate (10), and a reverse U-shaped seat (1008) corresponding to the L-shaped elastic sheet (1007) is fixedly connected to the stove head (2). A limiting protrusion (10071) is formed on the top of the end of the L-shaped elastic sheet (1007) away from the ring-shaped plate (10), and the limiting protrusion (10071) can be clamped on the reverse U-shaped seat (1008) after the end of the L-shaped elastic sheet (1007) away from the ring-shaped plate (10) penetrates through the inner side of the reverse U-shaped seat (1008).

7. A dual safety flame failure protection system for a cooktop according to claim 6, characterized in that: A guide inclined surface (10072) is formed on the top of the limiting protrusion (10071).

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