Infrared gas stove and control method thereof

Abstract

The invention discloses an infrared gas stove and a control method thereof, and the infrared gas stove comprises: a burner having an inner ring gas cavity and an outer ring gas cavity; the plug valve is provided with an air inlet, an inner ring air outlet and an outer ring air outlet, the outer ring air outlet is communicated with the outer ring air cavity through an outer ring air pipe, and the inner ring air outlet is communicated with the inner ring air cavity through an inner ring air pipe; the switch assembly comprises a first switch, and the first switch is arranged on the outer ring air pipe and used for controlling the on-off state of the outer ring air pipe; the controller is electrically connected with the plug valve, the combustor and the first switch and used for controlling the first switch to be turned on in a delayed mode when the combustor discharges and ignites or controlling the first switch to be turned on after ignition succeeds. The infrared gas stove provided by the invention is simple in structure, and effectively improves the phenomena of flame overflow of the burner and thermal ignition deflagration.

Description

Technical Field

[0001] The present invention relates to the technical field of stoves, and in particular to an infrared gas stove and a control method thereof. Background Art

[0002] Infrared gas stoves are popular in the market for their better heating uniformity during cooking, lower CO emissions in their exhaust gas, and higher thermal efficiency. However, in order to achieve a higher primary air coefficient to meet nearly full premixed combustion, the fire hole area of ​​infrared gas stoves is usually dozens of times that of atmospheric stove fire holes, so the diameter of infrared gas stoves is usually larger. When the heat intensity of the fire hole is constant, as the heat load continues to increase, the size of the burner will further increase. When it increases to a certain extent, the initially ignited flame will be transmitted outward from the ignition point until the flame is transmitted and covers the entire surface of the combustion plate. The outermost side of the combustion plate has the longest fire transmission path and the fire transmission time is relatively long. At this time, a large amount of gas has already escaped from the outer ring to the outside of the pot, so the outer side of the pot will also form an instantaneous flash of gas, causing the gas stove to overflow the bottom of the pot at the moment of ignition, posing certain safety hazards.

[0003] In addition, when the user turns off the fire after cooking and continues to ignite the gas stove while the burner is still hot, because the flame propagates faster in the hot state, the gas will not escape as large an area as when it is cold, but because the gas that has escaped from the outer ring is instantly ignited near the disk after the inner ring is ignited, there will be an obvious explosion sound, affecting the user experience. Summary of the invention

[0004] The present invention aims to solve at least one of the problems existing in the prior art to a certain extent. To this end, the present invention provides an infrared gas stove with a simple structure, which effectively improves the phenomenon of burner flame overflow and hot ignition explosion. The present invention also provides a control method for the infrared gas stove.

[0005] According to the infrared gas stove provided above, it is realized by the following technical solution:

[0006] An infrared gas stove comprises: a burner having an inner ring air cavity and an outer ring air cavity, wherein the outer ring air cavity is located at the periphery of the inner ring air cavity; a stopcock having an air inlet, an inner ring air outlet and an outer ring air outlet, wherein the outer ring air outlet is connected to the outer ring air cavity through an outer ring air pipe, and the inner ring air outlet is connected to the inner ring air cavity through an inner ring air pipe; a switch assembly comprises a first switch, wherein the first switch is arranged on the outer ring air pipe and is used to control the on-off state of the outer ring air pipe; a controller, which is electrically connected to the stopcock, the burner and the first switch, respectively, and is used to control the first switch to delay opening when the burner discharges and ignites, or to control the first switch to open after successful ignition.

[0007] In some embodiments, the first switch is a time delay valve, which is used to delay opening when the burner discharges and ignites, or to open immediately after successful ignition, and is also used to close immediately or delay closing after flameout.

[0008] In some embodiments, when the stopcock is ignited, the inner ring air outlet discharges air before the outer ring air outlet, or the inner ring air outlet and the outer ring air outlet discharge air synchronously.

[0009] In some embodiments, the burner further has a middle ring air cavity, which is located between the inner ring air cavity and the outer ring air cavity; the plug valve further has a middle ring air outlet, which is connected to the middle ring air cavity through a middle ring air pipe.

[0010] In some embodiments, the switch assembly also includes a second switch, which is arranged on the middle ring gas pipe and electrically connected to the controller, and is used to delay opening when the burner discharges and ignites, or to open immediately after successful ignition, and is also used to close immediately or delay closing after flameout.

[0011] In some embodiments, when the stopcock is ignited, the inner ring outlet discharges air before the middle ring outlet, or the inner ring outlet and the middle ring outlet discharge air synchronously, and the middle ring outlet and the outer ring outlet discharge air synchronously or asynchronously.

[0012] In some embodiments, a stir-fry valve is provided on the inner ring air pipe, and / or a stir-fry valve is provided on the outer ring air pipe or the outer ring air outlet, and the controller is electrically connected to the stir-fry valve for controlling the stir-fry valve to open after receiving a stir-fry signal.

[0013] In some embodiments, the burner includes a combustion body assembly and an ignition assembly, and the combustion body assembly includes: a burner head, a central cavity with upper and lower openings is provided at the center of the burner head, and an inner ejector tube and an outer ejector tube are provided at the bottom of the burner head; an inner cup body is arranged at the top of the burner head and is located at the periphery of the central cavity, an inner ring air cavity opening upward is formed between the inner cup body and the central cavity, and the inner ring air cavity is connected to the air outlet end of the inner ring air pipe through the inner ejector tube; an outer plate body is detachably installed on the top of the burner head and is located at the periphery of the inner cup body, an outer ring air cavity opening upward is formed between the outer plate body and the inner cup body, and the outer ring air cavity is connected to the air inlet end of the outer ring air pipe through the outer ejector tube; a combustion plate, covering the top opening of the inner ring air cavity and the top opening of the outer ring air cavity respectively; an ignition assembly is vertically penetrated through the central cavity, and can be switched between a locked position and an unlocked position.

[0014] In some embodiments, the combustion body assembly also includes a heat insulation plate, which is arranged in the outer ring air cavity and connected to the burner head. The heat insulation plate presses the inner cup body and the outer plate body tightly against the top of the burner head respectively, and a plurality of air holes for the outer ring gas to pass through are provided on the heat insulation plate.

[0015] In some embodiments, the burner also includes a base assembly, which is arranged at the bottom of the combustion body assembly, and an inner ring air duct and an outer ring air duct are provided on the base assembly, the inner ejector tube is connected to the air outlet end of the inner ring air pipe through the inner ring air duct, and the outer ejector tube is connected to the air outlet end of the outer ring air pipe through the outer ring air duct, and the ignition assembly is detachably mounted on the base assembly.

[0016] In some embodiments, a fixing seat is provided between the base assembly and the burner, and the fixing seat is provided with a mounting hole and two latching positions located outside the mounting hole; the ignition assembly includes an ignition needle, which can be movably vertically inserted into the mounting hole and is provided with a positioning rod, and the positioning rod can move between the two latching positions.

[0017] According to the above-mentioned control method of an infrared gas stove, it is implemented through the following technical solutions:

[0018] A control method for an infrared gas stove, which is applied to the infrared gas stove as described above, and the control method comprises the following steps:

[0019] S1, after the infrared gas stove is powered on, continuously determine whether the infrared gas stove sends out an ignition signal, if yes, proceed to the next step, if not, continue to execute this step;

[0020] S2, controls the plug valve to provide inner ring gas to the burner, and controls the discharge ignition of the burner at the same time or with a delay;

[0021] S3, when the burner discharges and ignites, the control switch component is delayed to open, or after the burner ignites successfully, the control switch component is opened.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] The infrared gas stove of the present invention adds a first switch between the outer ring air cavity of the burner and the outer ring air outlet of the stopcock. The first switch is used to delay opening when the burner discharges and ignites, or to open immediately after the ignition is successful. In this way, the inner ring air cavity of the burner supplies air before the outer ring air cavity of the burner, thereby improving the phenomenon of burner flame overflow and hot ignition deflagration, and improving safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1is a top view of the infrared gas stove in Embodiment 1 of the present invention;

[0025] Figure 2 is a cross-sectional view of a burner in Example 1 of the present invention;

[0026] Figure 3 This is a connection block diagram of the infrared gas stove in Embodiment 1 of the present invention;

[0027] Figure 4 is a flow chart of a control method of an infrared gas stove in Embodiment 1 of the present invention;

[0028] Figure 5 This is a connection block diagram of the infrared gas stove in Embodiment 2 of the present invention;

[0029] Figure 6 is an exploded view of a burner in Example 3 of the present invention;

[0030] Figure 7 is an exploded view of the combustion body assembly in Example 3 of the present invention;

[0031] Figure 8 is a cross-sectional view of the combustion body assembly in Example 3 of the present invention without the heat insulation board;

[0032] Fig. 9 is a cross-sectional view of a combustion body assembly with a heat shield in Example 3 of the present invention;

[0033] Fig.10 The structure of the burner in Embodiment 3 of the present invention is shown in FIG. Figure 1 ;

[0034] Fig.11 The structure of the burner in Embodiment 3 of the present invention is shown in FIG. Figure 2 ;

[0035] Fig.12 is a schematic structural diagram of the inner cup body and the outer disc body in Example 3 of the present invention;

[0036] Fig.13 is a schematic structural diagram of a heat insulation board in Example 3 of the present invention;

[0037] Fig.14 is a schematic diagram of the structure in which the ignition assembly is installed on the base assembly in Embodiment 3 of the present invention;

[0038] Fig.15 is an exploded view of the ignition assembly in Example 3 of the present invention;

[0039] Fig.16 is an exploded view of the base assembly in Example 3 of the present invention;

[0040] Fig.17 It is a schematic diagram of the structure of the fixing seat in Example 3 of the present invention.

[0041] In the figure: 1-burner, 11-combustion body assembly, 111-inner ring air cavity, 112-outer ring air cavity, 113-central cavity, 1131-upper card slot, 12-ignition assembly, 121-discharge part, 122-flame sensing part, 13-base assembly, 131-inner ring air channel, 132-outer ring air channel; 21-stopcock, 211-air inlet, 212-inner ring air outlet, 213-outer ring air outlet, 22-main switch valve, 23-first switch, 24-second switch, 25-frying valve; 3-controller;

[0042] 41-burner head, 411-inner ejector tube, 412-outer ejector tube, 4131-inner air inlet cavity, 4132-inner mounting groove, 4141-outer air inlet cavity, 4142-outer mounting groove, 415-inner annular boss, 416-outer annular boss, 417-positioning column, 42-inner cup body, 421-limiting step, 422-lower flange, 43-outer plate body, 431-inner flange, 432-supporting platform, 44-combustion plate, 45-insulation plate, 451-vent, 452-flow guide, 453-flow guide plate, 454-outer flange, 46-connecting piece;

[0043] 51-ignition needle, 511-positioning rod, 52-elastic member, 53-clamp ring;

[0044] 61-fixed seat, 611-mounting hole, 612-bit, 613-slide groove, 614-flange, 615-notch, 616-lug, 617-limiting part, 62-fastener, 63-base body, 631-accommodating groove, 632-reinforcement rib, 633-threading hole. DETAILED DESCRIPTION

[0045] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0046] Example 1

[0047] refer to Figure 1-3The present embodiment provides an infrared gas stove, comprising a burner 1, a stopcock 21, a switch assembly and a controller 3, wherein the burner 1 has an ignition and flameout sensing function, and the burner 1 has an inner ring air cavity 111 and an outer ring air cavity 112, and the outer ring air cavity 112 is located on the periphery of the inner ring air cavity 111, so that the infrared gas stove has an inner ring fire and an outer ring fire. The burner 1 also has a central cavity 113, and the central cavity 113 is located radially inward of the inner ring air cavity 111. A vertically arranged ignition assembly 12 is provided in the central cavity 113, and the upper end of the ignition assembly 12 extends to above the top of the central cavity 113.

[0048] The plug valve 21 has an air inlet 211, an inner ring air outlet 212 and an outer ring air outlet 213. The air inlet end of the outer ring air outlet 213 is selectively connected to the air inlet 211, and the air outlet end of the outer ring air outlet 213 is connected to the outer ring air cavity 112 through the outer ring air pipe to form an outer ring air path. The air inlet end of the inner ring air outlet 212 is selectively connected to the air inlet 211, and the air outlet end of the inner ring air outlet 212 is connected to the inner ring air cavity 111 through the inner ring air pipe to form an inner ring air path.

[0049] The switch assembly includes a first switch 23, which is arranged on the outer ring gas pipe and is used to control the on / off state of the outer ring gas pipe (i.e., the outer ring gas circuit), so as to control the gas supply to the outer ring gas cavity 112 of the burner 1. Specifically, the first switch 23 is configured to be opened with a delay when the burner 1 discharges and ignites, or to be opened immediately after the ignition is successful, and to be closed immediately or with a delay after the burner 1 is extinguished.

[0050] The controller 3 is electrically connected to the stopcock 21, the burner 1 and the first switch 23, respectively. The controller 3 is used to control the burner 1 to discharge and ignite after receiving the ignition signal, and is also used to control the first switch 23 to delay opening when the burner 1 discharges and ignites, or to control the first switch 23 to open after the ignition is successful; the controller 3 is also used to control the first switch 23 to close immediately or delay closing when receiving the flameout signal. This embodiment takes the first switch 23 being controlled to open after the ignition is successful as an example, so that the first switch 23 is effectively prevented from opening when the ignition is unsuccessful and supplying gas to the outer ring air cavity 112, thereby preventing the outer ring gas from entering the outer ring air cavity 112 and escaping to the outside of the cookware, preventing the waste of gas, and preventing the obvious explosion sound when the ignitions continue to occur.

[0051] When the inner ring gas is supplied to the inner ring air cavity 111 of the burner 1 and is ignited on the upper surface of the burner 1 and the flame in the inner ring area has been transmitted and covered with the flame, the first switch 23 is turned on to allow the outer ring gas to start supplying gas to the outer ring air cavity 112 of the burner 1. In this way, the path for the flame to be transmitted from the inner ring to the outer ring becomes shorter, and the flame transmission time is reduced. Since there is no outer ring gas that has escaped during the ignition period, the flame spillage phenomenon of the gas stove during cold ignition is effectively improved, thereby improving the safety of use. Since the amount of gas escape is reduced, the explosion sound that occurs when the gas stove is ignited in a hot state is also improved, thereby improving the user experience.

[0052] refer to Figure 2 Furthermore, the burner 1 includes a combustion body assembly 11 and an ignition assembly 12. The combustion body assembly 11 has an inner ring air cavity 111, an outer ring air cavity 112, and a central cavity 113 with upper and lower ends opening. The central cavity 113 is located radially inward of the inner ring air cavity 111. The ignition assembly 12 is vertically arranged in the central cavity 113, and it can be switched between a locked position and an unlocked position; when the ignition assembly 12 is in the unlocked position, the combustion body assembly 11 can be detached from the ignition assembly 12, which is convenient for the combustion body assembly 11; conversely, when the ignition assembly 12 is in the locked position, the ignition assembly 12 is stably and reliably installed in the central cavity 113 of the combustion body assembly 11. At this time, the ignition assembly 12 upper limits the combustion body assembly 11, so that the combustion body assembly 11 cannot be detached from the ignition assembly 12.

[0053] In addition, the burner 1 further includes a base assembly 13, which is disposed at the bottom of the combustion body assembly 11 and reliably supports the combustion body assembly 11. An inner ring air passage 131 and an outer ring air passage 132 are disposed on the base assembly 13. The inner ring air cavity 111 is connected to the gas outlet end of the inner ring air pipe through the inner ring air passage 131, and the outer ring air cavity 112 is connected to the gas outlet end of the outer ring air pipe through the outer ring air passage 132. The ignition assembly 12 is detachably mounted on the base assembly 13, and it can be switched between a locked position and an unlocked position.

[0054] Furthermore, the plug valve 21 can be designed so that when ignition is started, the inner ring gas outlet 212 thereof discharges gas before the outer ring gas outlet 213, so that when the gas stove is ignited, the plug valve 21 effectively supplies gas to the inner ring gas cavity 111 of the burner 1. Of course, the plug valve 21 can also be designed so that when ignition is started, the inner ring gas outlet 212 and the outer ring gas outlet 213 discharge gas synchronously, and since a first switch 23 is provided between the outer ring gas outlet 213 and the outer ring gas cavity 112 of the burner 1, the first switch 23 is logically controlled to effectively ensure that the outer ring gas supply lags behind the inner ring gas supply.

[0055] Furthermore, the first switch 23 is preferably a time-delay valve, which is used to delay opening when the burner 1 discharges and ignites, or to open immediately after successful ignition, and is also used to close immediately or delay closing after flameout. It is particularly noted that the time-delay valve is delayed to open when the burner 1 discharges and ignites. At this time, when the valve opening time is reached, the time-delay valve will open regardless of whether the ignition is successful or not. Of course, the time-delay valve can also be configured to never open when the ignition is unsuccessful, and only open after the ignition is successful. In this way, the time-delay valve is avoided from being opened frequently, which is beneficial to improving the service life of the time-delay valve, and at the same time effectively avoids the supply of gas to the outer ring air cavity 112 of the burner 1 when the ignition is unsuccessful, thereby improving the phenomenon of flame spillage during cold ignition and deflagration during hot ignition.

[0056] refer to Figure 3 Furthermore, the infrared gas stove further includes a main switch valve 22, which is disposed at the air inlet 211 and electrically connected to the controller 3, and is used to control the on-off state of the air inlet 211, thereby controlling whether to supply gas to the plug valve 21. The controller 4 is used to open the main switch valve 22 to supply gas to the plug valve 21 when receiving an ignition signal; and is also used to synchronously close the main switch valve 22 and the first switch 23 when receiving a flameout signal.

[0057] refer to Figure 4 Further, the infrared gas stove also includes a stir-fry valve 25, which is provided on the outer ring gas pipe or the outer ring gas outlet 213. The controller 3 is electrically connected to the stir-fry valve 25, and is used to control the stir-fry valve 25 to open after receiving the stir-fry signal, so that the outer ring load of the burner 1 increases, thereby realizing the one-key stir-fry function, and the stir-fry valve 25 is closed when the set opening time is reached. Of course, the stir-fry valve 25 can also be designed on the inner ring gas pipe instead, so that the inner ring load of the burner 1 increases when the stir-fry valve 25 is opened, or stir-fry valves 25 are provided on both the inner ring gas pipe and the outer ring gas pipe.

[0058] refer to Figure 4 This embodiment also provides a control method for an infrared gas stove. The control method applies the infrared gas stove as described above. The control method specifically includes the following steps:

[0059] S1, after the infrared gas stove is powered on, continuously determine whether the infrared gas stove sends out an ignition signal, if yes, proceed to the next step, if not, continue to execute this step;

[0060] Specifically, after the infrared gas stove is powered on, it continuously determines whether the stopcock 21 rotates from the closing position to the ignition position, or continuously determines whether the user touches the start button. If so, an ignition signal is issued and the ignition signal is transmitted to the controller 3. Otherwise, no ignition signal is issued and this step continues.

[0061] S2, control the plug valve 21 to provide inner ring gas to the burner 1, and control the discharge and ignition of the burner 1 at the same time or with a delayed time;

[0062] Specifically, after receiving the ignition signal, the controller 3 opens the main switch valve 22 of the gas stove to provide inner ring gas to the inner ring air cavity 111 of the burner 1 through the inner ring gas outlet 212 of the stopcock 21, and simultaneously or with a delay starts the ignition component 12 of the burner 1 to cause the ignition component 12 to discharge and ignite, thereby igniting the inner ring gas in the micropores of the inner ring area of ​​the combustion body component 11, and then causing the inner ring area of ​​the combustion body component 11 to be conducted and filled with flames, forming an inner ring fire.

[0063] S3, when the burner 1 discharges and ignites, the control switch component is delayed to open, or after the burner 1 is successfully ignited, the control switch component is opened;

[0064] Specifically, when the burner 1 discharges and ignites or after the burner 1 is successfully ignited, the controller 3 sends a signal to open the first switch 23 in the switch assembly, and the outer ring gas enters the outer ring gas cavity 112 of the burner 1 through the first switch 23, and is ignited in the micropores in the outer ring area of ​​the combustion body assembly 11, so that the flame conduction covers the outer ring area to form an outer ring fire.

[0065] During the cooking process, the first switch 23 is always in the open state, and the on and off of the outer ring gas is controlled by the rotation of the valve core of the plug valve 21. During this process, if the user activates the one-button stir-fry button, the controller 3 controls the stir-fry valve 25 to open, so that the load of the burner is instantly increased to meet the stir-fry requirement.

[0066] It can be seen that by delaying the opening of the first switch 23 in the switch assembly when the burner 1 discharges and ignites, or opening the first switch 23 immediately after the ignition is successful, the inner ring air cavity 111 of the burner 1 supplies gas before the outer ring air cavity 112 of the burner 1, so that the path of the flame transmitted from the inner ring to the outer ring becomes shorter, the flame transmission time is reduced, and there is no gas that has escaped from the outer ring during the ignition time period, which improves the flame spillage during the cold ignition of the gas stove. Since the amount of gas escape is reduced, the explosion sound that occurs during the hot ignition of the gas stove is also improved.

[0067] Furthermore, the control method further comprises the following steps:

[0068] S4, continuously determining whether the infrared gas stove sends out a flameout signal, if yes, proceeding to the next step, if no, continuing to execute this step;

[0069] Specifically, it is continuously determined whether the stopcock 21 is rotated to the off position, or it is continuously determined whether the user touches the off button, and if so, a off signal is issued and sent to the controller 3 .

[0070] S5, control the stopcock valve 21 to close, and control the switch assembly to close immediately or with a delayed closing.

[0071] Specifically, when the controller 3 receives the fire-off signal, it synchronously closes the main switch valve 22 of the gas stove and the first switch 23 in the switch assembly. If the fire is in a stir-frying state when the fire is turned off, the stir-frying valve 25 is also closed. Of course, the first switch 23 can also be closed later than the main switch valve 22.

[0072] Example 2

[0073] refer to Figure 5 The difference between this embodiment and embodiment 1 is that the burner 1 also has a middle ring air cavity, which is located between the inner ring air cavity 111 and the outer ring air cavity 112, and the plug valve 21 also has a middle ring air outlet, which is connected to the middle ring air cavity through the middle ring air pipe to form a middle ring air path, so that the burner 1 has an inner ring fire, a middle ring fire and an outer ring fire.

[0074] Furthermore, the plug valve 21 can be designed so that when ignited, the inner ring air outlet 212 discharges air before the middle ring air outlet, or the inner ring air outlet 212 and the middle ring air outlet discharge air synchronously; the outer ring air outlet 213 and the middle ring air outlet discharge air synchronously, or the outer ring air outlet 213 is earlier or later than the middle ring air outlet.

[0075] Furthermore, the switch assembly also includes a second switch 24, which is arranged on the middle ring gas pipe and electrically connected to the controller 3, and is used to delay opening when the burner 1 discharges and ignites, or immediately open after ignition is successful, and is also used to immediately close or delay closing after flameout. Therefore, by adding the second switch 24 between the middle ring gas outlet of the plug valve 21 and the middle ring gas cavity of the burner 1, the phenomenon of burner flame spillage and hot ignition deflagration is effectively improved.

[0076] This embodiment also provides a control method for an infrared gas stove. The control method is applied to the infrared gas stove as described above. The control method specifically includes the following steps:

[0077] S1, after the infrared gas stove is powered on, continuously determine whether the infrared gas stove sends out an ignition signal, if yes, proceed to the next step, if not, continue to execute this step;

[0078] S2, control the plug valve 21 to provide inner ring gas to the burner 1, and control the discharge and ignition of the burner 1 at the same time or with a delayed time;

[0079] S3, when the burner 1 discharges and ignites, the control switch component is delayed to open, or after the burner 1 is successfully ignited, the control switch component is opened;

[0080] Specifically, when the burner 1 discharges and ignites or after the burner 1 is successfully ignited, the controller 3 sends a signal and controls the first switch 23 and the second switch 24 in the switch assembly to open simultaneously, or controls the second switch 24 in the switch assembly to open before the first switch 23. The middle ring gas enters the middle ring gas cavity of the burner 1 through the second switch 24, and is ignited in the micropores in the middle ring area of ​​the combustion body assembly 11, so that the flame conduction covers the outer ring area, forming a middle ring fire. The outer ring gas enters the outer ring gas cavity 112 of the burner 1 through the first switch 23, and is ignited in the micropores in the outer ring area of ​​the combustion body assembly 11, so that the flame conduction covers the outer ring area, forming an outer ring fire.

[0081] It can be seen that by delaying the opening of the first switch 23 and the second switch 24 when the burner 1 discharges and ignites, or opening the first switch 23 and the second switch 24 immediately after the ignition is successful, the first switch 23 and the second switch 24 can be opened synchronously, or the first switch 23 is opened later than the second switch 24, so that the inner ring air cavity 111 of the burner 1 supplies air before the outer ring air cavity 112 and the middle ring air cavity of the burner 1, and the middle ring air cavity supplies air before or synchronously with the outer ring air cavity 112. In this way, the flame spillage during cold ignition of the gas stove and the explosion sound during hot ignition are improved.

[0082] Furthermore, the control method further comprises the following steps:

[0083] S4, continuously determining whether the infrared gas stove sends out a flameout signal, if yes, proceeding to the next step, if no, continuing to execute this step;

[0084] S5, control the stopcock valve 21 to close, and control the switch assembly to close immediately or with a delayed closing.

[0085] Specifically, when the controller 3 receives the fire-off signal, it synchronously closes the main switch valve 22, the first switch 23 and the second switch 24 of the gas stove. If the gas stove is in a stir-frying state when the fire is turned off, it also closes the stir-frying valve 25. Of course, the first switch 23 and the second switch 24 can also be closed later than the main switch valve 22, and the first switch 23 can be closed later than or synchronously with the second switch 24.

[0086] Example 3

[0087] refer to Figure 6-9 The difference between this embodiment and the first embodiment is that this embodiment provides a specific structure of a burner 1. The burner 1 includes a combustion body assembly 11, an ignition assembly 12 and a base assembly 13, wherein the combustion body assembly 11 includes a burner head 41, an inner cup body 42, an outer disc body 43 and a combustion plate 44, a central cavity 113 with upper and lower ends opened is provided at the center of the burner head 41, and an inner ejector tube 411 and an outer ejector tube 412 are provided at the bottom of the burner head 41.

[0088] The inner cup body 42 is arranged on the top of the burner 41 and is located on the periphery of the central cavity 113. An inner ring air cavity 111 opening upward is formed between the inner cup body 42 and the central cavity 113. The inner ring air cavity 111 is connected to the gas outlet end of the inner ring air pipe through the inner ejector tube 411. The outer disk body 43 is detachably installed on the top of the burner 41 and is located on the periphery of the inner cup body 42. An outer ring air cavity 112 opening upward is formed between the outer disk body 43 and the inner cup body 42. The outer ring air cavity 112 is connected to the gas inlet end of the outer ring air pipe through the outer ejector tube 412. The combustion plate 44 is sandwiched between the outer disk body 43 and the outer side wall of the central cavity 113, and the inner cup body 42 is pressed against the top of the burner 1 to prevent the inner and outer air cavities from cross-gasing. The combustion plate 44 covers the top opening of the inner ring air cavity 111 and the top opening of the outer ring air cavity 112 respectively. It can be seen that by designing the burner head 41, the inner cup body 42 and the outer plate body 43 as a separate structure, it is more convenient to process and manufacture, and the yield rate is improved.

[0089] The ignition assembly 12 is vertically penetrated through the central cavity 113, and its lower end is detachably connected to the base assembly 11, and the upper end is provided with a discharge portion 121 extending to the radial inner side of the top of the combustion plate 44. In addition, a flame sensing portion 122 extending to the radial inner side of the top of the combustion plate 44 is also provided at the upper end of the ignition assembly 12, so that the ignition assembly 12 has the dual functions of ignition and flameout sensing. The ignition assembly 12 can rotate relative to the base assembly 13 and the combustion body assembly 11, so that the ignition assembly 12 can switch between a locked position and an unlocked position. In this way, the combustion body assembly 11 can be quickly disassembled and assembled without removing the ignition assembly 12.

[0090] refer to Figure 10-11Furthermore, an inner air intake cavity 4131 and an inner mounting groove 4132 which are recessed downward and open upward are provided on the top of the burner head 41. The inner air intake cavity 4131 is arranged between the central cavity 113 and the inner cup body 42. The inner mounting groove 4132 spans the inner ring air cavity 111 and the outer ring air cavity 112. At least part of the inner ejector tube 411 is arranged in the inner mounting groove 4132 and is integrally formed with the two groove walls of the inner mounting groove. The air outlet end of the inner ejector tube 411 is connected with the inner ring air cavity 111 through the inner air intake cavity 4131. In addition, two outer air inlet cavities 4141 and two outer mounting grooves 4142 that are concave downward and open upward are provided on the top of the burner head 41. The two outer air inlet cavities 4141 and the two outer mounting grooves 4142 are both provided between the inner cup body 42 and the outer plate body 43, and the two outer air inlet cavities 4141 and the two outer mounting grooves 4142 are respectively located on two opposite outer sides of the inner cup body 42. At least part of the outer ejector tube 412 is provided in the outer mounting groove 4142 and is integrally formed with the two groove walls of the outer mounting groove. The gas outlet end of the outer ejector tube 412 is connected to the outer ring air cavity 112 through the corresponding outer air inlet cavity 4141. It can be seen that the burner head 41 and the inner and outer ejector tubes are convenient for rapid processing, forming and demoulding, and it is beneficial to reduce the height of the burner head 41 in the vertical direction.

[0091] refer to Figure 8-12 An inner annular boss 415 extending upward and located at the periphery of the central cavity 113 is integrally formed on the radial inner side of the top of the burner head 41. The inner cup body 42 is mounted outside the inner annular boss 415 and abuts or connects with the top of the burner head 41 to limit the inner cup body 42 in the radial direction. Furthermore, a limiting step 421 arranged in the circumferential direction and in an annular shape is provided on the inner cup body 42. The limiting step 421 is located above the inner annular boss 415 and abuts or fits with the top of the inner annular boss 415 in a clearance. At this time, the inner annular boss 415 can limit the inner cup body to the lower position to prevent the inner cup body from being squeezed and deformed. In addition, a lower flange edge 422 extending outward is integrally formed on the periphery of the lower end of the inner cup body 42. The lower flange edge 422 tightly abuts against the top of the burner head 41 to increase the contact area, improve the sealing performance between the inner cup body 42 and the top of the burner head 1, and make the installation of the inner cup body 42 more stable and reliable.

[0092] An outer annular boss 416 extending upward is integrally formed on the outer edge of the top of the burner head 41. In addition, at least two positioning posts 417 extending upward are integrally formed on the radially outer side of the top of the burner head 41. All positioning posts 417 are arranged circumferentially at intervals, and each positioning post is located radially inside the outer annular boss 416 and is integrally formed with the outer annular boss. The outer disk body 43 is sleeved outside the outer annular boss 416, and an inner flange 431 extending inward to the top of the outer annular boss 416 and the positioning posts 417 is integrally formed at its lower end. The inner flange 431 is detachably connected to the positioning posts 417 of the burner head 41 through a connecting piece 46 (such as a screw), and the inner flange 43 is pressed tightly against the top of the outer annular boss 416. As a result, the outer disk body 43 is firmly and reliably detachably connected to the burner head 41, and the sealing performance between the outer disk body 43 and the burner head 41 is effectively guaranteed.

[0093] refer to Figure 7-9 and Fig.13 In this embodiment, the combustion body assembly 11 further includes a heat insulation plate 45, which is arranged in the outer ring air cavity 112 and connected to the burner head 41. The heat insulation plate 45 presses the inner cup body 42 and the outer plate body 43 against the top of the burner head 41 respectively. The heat insulation plate 45 is provided with a plurality of vents 451 for the outer ring gas to pass through. All the vents 451 are arranged at intervals along the circumferential direction of the heat insulation plate 45, and are used to evenly distribute the gas in the outer ring air cavity 112 to the pores of the combustion plate 44. In other embodiments, the heat insulation plate 45 can be omitted, refer to Figure 8 .

[0094] The air hole 451 can be arranged obliquely in the vertical direction so that the air hole 451 discharges air obliquely upward. Of course, the air hole 451 can also be designed to be arranged vertically, and a guide portion 452 can be added to the radial inner end or the clockwise rear end of the air hole 451. The guide portion 452 is used to discharge the outer ring gas flowing through it toward the clockwise direction or radial outer side of the insulation plate 45, and is also used to prevent the combustion plate 44 from radiating heat directly downward, thereby reducing the temperature rise of the burner head 41 and the panel of the gas stove, and improving the heat exchange efficiency of the burner 1.

[0095] Furthermore, a limiting step 421 arranged in the circumferential direction and in an annular shape is provided in the middle of the inner cup body 42, and the radial inner end of the heat insulation plate 45 abuts against the top of the limiting step 421, and the inner cup body 42 is pressed tightly against the top of the burner head 41. The radial outer end of the heat insulation plate 45 is detachably connected to the positioning column 417 of the burner head 41 through a connecting member 46 (such as a screw), and the inner flange 43 of the outer disk body 43 is pressed tightly between the heat insulation plate 45 and the top of the outer annular boss 416.

[0096] In addition, a support platform 432 located below the combustion plate 44 is provided at the upper end of the outer disk body 43, and a guide plate 453 extending along the outer disk body 43 is integrally formed at the outer edge of the heat insulation plate 45. The upper end of the guide plate 453 is bent outward to form an outer flange 454, and the outer flange 454 is arranged on the top of the support platform 432 and abuts or is connected to the support platform 432. In this way, through the arrangement of the guide plate 453, the heat radiated downward by the combustion plate 44 can be better reduced, the heat loss can be reduced, and the thermal efficiency of the burner 1 can be improved.

[0097] refer to Figure 14-17 The base assembly 13 includes a fixed seat 61 and a base body 63. An inner ring airway 131 and an outer ring airway 132 are provided on the base body 63 of the base assembly 13. The inner ejector tube 411 is connected to the gas outlet end of the inner ring air pipe through the inner ring airway 131, and the outer ejector tube 412 is connected to the gas outlet end of the outer ring air pipe through the outer ring airway 132. The fixed seat 61 is arranged between the base body 63 of the base assembly 13 and the burner head 41. A mounting hole 611 and two latches 612 penetrating the upper and lower end surfaces of the fixed seat 61 are provided at a position corresponding to the central cavity 113. The two latches 612 are arranged circumferentially at intervals on the outside of the mounting hole 611. One of the latches 612 is a locking position, and the other is an unlocking position or a zero position.

[0098] The ignition assembly 12 includes an ignition needle 51 having a discharge portion 121 and a flame sensing portion 122. The ignition needle 51 is movably disposed vertically through the central cavity 113 and the mounting hole 611. The ignition needle 51 can move up and down and rotate in the circumferential direction relative to the combustion body assembly 11 and the base assembly 13. A positioning rod 511 extending downward is provided on the ignition needle 51, and the positioning rod 511 can move between two locking positions 612.

[0099] When the ignition assembly is in the locked position, the positioning rod 511 is inserted into the locking position. At this time, the discharge part 121 and the flame sensing part 122 of the ignition assembly 12 are both located above the combustion plate 44, and the combustion body assembly 11 cannot be removed from the base assembly 13. When the combustion body assembly 11 needs to be removed, the ignition needle 51 is first pulled upward to move the positioning rod 511 away from the locking position; then the ignition needle 51 is rotated to move the positioning rod 511 to the unlocking position, and finally the positioning rod 511 is inserted into the unlocking position. At this time, the discharge part 121 and the flame sensing part 122 of the ignition assembly 12 are both moved to the center cavity 113. Without removing the ignition assembly 12, the combustion body assembly 11 can be removed from the base assembly 13 for cleaning.

[0100] Furthermore, the fixing seat 61 is further provided with a slide groove 613, and the two latching positions 612 are connected through the slide groove 613, so that when the ignition assembly 12 is in the switching position, the positioning rod 511 can move along the slide groove 613 without pulling up the ignition assembly 12 significantly, and the slide groove 613 can allow secondary air to pass through, so as to realize the secondary air replenishment to the central cavity 113 through the slide groove 613. In addition, referring to Figure 14-17 A notch 615 is further provided at the lower end of the fixing seat 61 and is located between the slide groove 613 and the mounting hole 611 . The slide groove 613 is connected to the mounting hole 611 through the notch 615 to save materials.

[0101] The top of the fixing seat 61 is integrally formed with a limit portion 617 extending upward. The limit portion 617 is arranged close to the locking position 612, and its upper end is upwardly inserted into the lower end of the central cavity 113. It is used to allow the ignition component 12 to rotate only within a specified area to prevent the ignition needle and thread from becoming tangled or even twisted off due to unlimited rotation. It is also used as a handle to facilitate taking the fixing seat.

[0102] Furthermore, the ignition assembly 12 also includes an elastic member 52 and a clamping ring 53. The clamping ring 53 is arranged below the fixing seat 61 and clamps the lower end of the ignition needle 51. The elastic member 52 is sleeved on the outside of the lower end of the ignition needle 51 and clamped between the clamping ring 53 and the fixing seat 61. In this way, the ignition needle 51 can be stably and reliably fixed on the fixing seat 61 to prevent the ignition needle 51 from being pulled upward out of the fixing seat 61.

[0103] refer to Figure 14-17 The lower end of the fixing seat 61 can be detachably connected to the base body 63 of the base assembly 13 through a fastener 62 (such as a screw). Of course, the lower end of the fixing seat 61 can be integrally formed with the base body 63. In this embodiment, a receiving groove 631 suitable for embedding the lower end of the fixing seat 61 is concavely provided at the top of the base body 63 corresponding to the fixing seat 61, and a threading hole 633 is provided on the partial bottom surface of the receiving groove 631 for the wire of the ignition assembly 12 to pass through. The lower end of the fixing seat 61 is inserted into the receiving groove 631, and the two opposite outer side walls of the lower end of the fixing seat 61 are respectively integrally formed with lugs 616 extending outwards, and the lugs 616 are fastened to the base body 63 by fasteners 62 (such as screws). In addition, in order to further strengthen the strength of the base body 63, a reinforcing rib 632 extending upwards is integrally formed at the top of the base body 63. The reinforcing rib is prismatic, and the receiving groove 631 horizontally penetrates the reinforcing rib 632 and divides the reinforcing rib 632 into two parts.

[0104] The upper end of the fixed seat 61 is plugged with the lower end of the central cavity 113, and the slide groove 613 is connected with the central cavity 113, so that the fixed seat 61 cooperates with the lower end of the central cavity 113 to realize reliable positioning of the combustion body assembly 11, and at the same time, secondary air can be added to the central cavity 113 through the slide groove 613 to make the inner ring fire burn more fully. Furthermore, in order to prevent the combustion body assembly 11 from rotating relative to the fixed seat 61, the upper end of the fixed seat 61 and the lower end of the central cavity 113 are designed to be any one of "D" shape, ellipse or polygon. In addition, a positioning structure can be provided between the fixed seat 61 and the cavity wall of the central cavity 113.

[0105] The positioning structure includes a flange 614 and an upper clamping groove 1131 that are matched and clamped together. At least one upper clamping groove 1131 is provided at the lower end of the cavity wall of the central cavity 113. A flange 614 is protruded at a position on the outer wall of the fixing seat 61 corresponding to the upper clamping groove 1131. The upper end of the flange 614 is matched and clamped with the upper clamping groove 1131. In addition, the positioning structure also includes a lower clamping groove 6311. The lower end of the flange 614 is matched and clamped with the lower clamping groove 6311.

[0106] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An infrared gas stove, It is characterized in that include: A burner (1) comprising an inner ring air cavity (111) and an outer ring air cavity (112), wherein the outer ring air cavity (112) is located outside the inner ring air cavity (111); The plug valve (21) comprises an air inlet (211), an inner ring air outlet (212) and an outer ring air outlet (213), wherein the outer ring air outlet (213) is connected to the outer ring air cavity (112) via an outer ring air pipe, and the inner ring air outlet (212) is connected to the inner ring air cavity (111) via an inner ring air pipe; A switch assembly comprises a first switch (23), which is arranged on the outer ring air pipe and is used to control the on / off state of the outer ring air pipe; A controller (3) is electrically connected to the stopcock (21), the burner (1) and the first switch (23) respectively, and is used to control the first switch (23) to delay opening when the burner (1) discharges and ignites, or to control the first switch (23) to open after the ignition is successful.

2. An infrared gas stove according to claim 1, It is characterized in that The first switch (23) is a time-delay valve, which is used to delay opening when the burner (1) discharges and ignites, or to open immediately after successful ignition, and is also used to close immediately or delay closing after extinguishing the flame.

3. An infrared gas stove according to claim 1, It is characterized in that When the stopcock (21) is ignited, the inner ring air outlet (212) discharges air before the outer ring air outlet (213), or the inner ring air outlet (212) and the outer ring air outlet (213) discharge air synchronously.

4. An infrared gas stove according to claim 1, It is characterized in that The burner (1) further comprises a middle ring air cavity, wherein the middle ring air cavity is located between the inner ring air cavity (111) and the outer ring air cavity (112); the plug valve (21) further comprises a middle ring air outlet, wherein the middle ring air outlet is connected to the middle ring air cavity via a middle ring air pipe.

5. An infrared gas stove according to claim 4, It is characterized in that The switch assembly also includes a second switch (24), which is arranged on the middle ring gas pipe and is electrically connected to the controller (3), and is used to delay opening when the burner (1) discharges and ignites, or to open immediately after ignition is successful, and is also used to close immediately or delay closing after flameout.

6. An infrared gas stove according to claim 4, It is characterized in that When the stopcock (21) is ignited, the inner ring air outlet (212) discharges air before the middle ring air outlet, or the inner ring air outlet (212) and the middle ring air outlet discharge air synchronously, and the middle ring air outlet and the outer ring air outlet (213) discharge air synchronously or asynchronously.

7. An infrared gas stove according to any one of claims 1 to 6, It is characterized in that A stir-fry valve (25) is provided on the inner ring air pipe, and / or a stir-fry valve (25) is provided on the outer ring air pipe or the outer ring air outlet (213), and the controller (3) is electrically connected to the stir-fry valve (25) for controlling the stir-fry valve (25) to open after receiving a stir-fry signal.

8. The infrared gas stove according to claim 1, It is characterized in that The burner (1) comprises a combustion body assembly (11) and an ignition assembly (12), wherein the combustion body assembly (11) comprises: A furnace head (41), wherein a central cavity (113) with upper and lower ends opened is provided at the center of the furnace head (41), and an inner ejector tube (411) and an outer ejector tube (412) are provided at the bottom of the furnace head (41); An inner cup body (42) is arranged on the top of the burner head (41) and is located at the periphery of the central cavity (113); an inner ring air cavity (111) opening upward is formed between the inner cup body (42) and the central cavity (113); the inner ring air cavity (111) is connected to the gas outlet end of the inner ring air pipe through the inner ejector tube (411); An outer plate (43) is detachably mounted on the top of the burner head (41) and is located outside the inner cup body (42); an outer ring air cavity (112) opening upward is formed between the outer plate (43) and the inner cup body (42); the outer ring air cavity (112) is connected to the air inlet end of the outer ring air pipe through the outer ejector pipe (412); A combustion plate (44) covering the top opening of the inner ring air cavity (111) and the top opening of the outer ring air cavity (112) respectively; The ignition assembly (12) is vertically arranged in the central cavity (113) and can be switched between a locked position and an unlocked position.

9. An infrared gas stove according to claim 8, It is characterized in that The combustion body assembly (11) further comprises a heat insulation plate (45), wherein the heat insulation plate (45) is arranged in the outer ring air cavity (112) and connected to the burner head (41), wherein the heat insulation plate (45) respectively presses the inner cup body (42) and the outer plate body (43) against the top of the burner head (41), and a plurality of vent holes (451) are provided on the heat insulation plate (45) for the outer ring gas to pass through.

10. An infrared gas stove according to claim 8 or 9, It is characterized in that The burner (1) further comprises a base assembly (13), wherein the base assembly (13) is arranged at the bottom of the combustion body assembly (11), and an inner ring air passage (131) and an outer ring air passage (132) are arranged on the base assembly (13); the inner ejector tube (411) is connected to the gas outlet end of the inner ring air pipe through the inner ring air passage (131), and the outer ejector tube (412) is connected to the gas outlet end of the outer ring air pipe through the outer ring air passage (132); and the ignition assembly (12) is detachably mounted on the base assembly (13).

11. An infrared gas stove according to claim 10, It is characterized in that A fixing seat (61) is provided between the base assembly (13) and the burner head (41), and the fixing seat (61) is provided with a mounting hole (611) and two latching positions (612) located outside the mounting hole (611); the ignition assembly (12) comprises an ignition needle (51), and the ignition needle (51) is movably vertically inserted into the mounting hole (611) and is provided with a positioning rod (511), and the positioning rod (511) is movable between the two latching positions (612).

12. A control method for an infrared gas stove, It is characterized in that Applying an infrared gas stove as described in any one of claims 1 to 11, the control method comprises the following steps: S1, after the infrared gas stove is powered on, continuously determine whether the infrared gas stove sends out an ignition signal, if yes, proceed to the next step, if not, continue to execute this step; S2, controls the plug valve (21) to provide inner ring gas to the burner (1), and simultaneously or with a delay controls the discharge ignition of the burner (1); S3, controlling the switch component to delay opening when the burner (1) discharges and ignites, or controlling the switch component to open after the burner (1) is successfully ignited.

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