EP4419845A1

EP4419845A1 - Method for manufacturing gas stove and gas stove

Info

Publication number: EP4419845A1
Application number: EP22800706.8A
Authority: EP
Inventors: Zhi Tan; Huan LIU
Original assignee: Electrolux Appliances AB
Current assignee: Electrolux Appliances AB
Priority date: 2021-10-22
Filing date: 2022-10-18
Publication date: 2024-08-28
Also published as: WO2023066939A1; CN116007011A

Abstract

The present application relates to a method for manufacturing a gas stove and a gas stove manufactured by this method. The method comprises: manufacturing a general rough-machined part for forming a burner base of a gas stove; and machining a gas passage in the rough-machined part to form the burner base according to one of multiple flame control modes, so that multiple flame rings can be controlled according to selected flame control mode. The basic idea of the present application is to produce burner bases with the same external configuration but different internal gas passage configurations based on a general rough-machined part, which thereby can be assembled with other general gas stove parts to form gas stoves with different flame control modes, so as to reduce the production cost and meet different cooking requirements of users. In particular, the present application provides a gas stove that allows each flame ring to be controlled independently, so that the flame size and temperature in different areas are accurately controlled during cooking.

Description

METHOD FOR MANUFACTURING GAS STOVE AND GAS STOVE

FIELD

[0001] The present application relates to the technical field of cooking utensils, and in particular to a method for manufacturing gas stove and a gas stove manufactured by this method.

BACKGROUND

[0002] The contents of this section only provide background information related to the present application, which may not constitute the conventional technology.

[0003] Common gas stoves currently on the market usually produce several (for example, three) roughly concentric flame rings. People in different countries or regions usually have different cooking habits, and therefore expect to control the flame size of these flame rings in different ways. For example, some users may want each flame ring to be independently controlled to precisely adjust the cooking temperature in different areas; some users may prefer a simple flame control mode, hoping that all flame rings are controlled together; some users may wish one or more flame rings on the outside to be controlled together as a group, but the flame ring in the center of the gas stove to be controlled individually. For gas stove manufacturers, in order to meet the requirements of users in different countries or regions, it is usually necessary to design and produce gas stove components with different configurations according to different flame control modes, which greatly increases the production cost. Therefore, it is expected to improve the manufacturing method of gas stoves, and adopt as many general gas stove components as possible to manufacture gas stoves with different flame control modes, thus reducing the production cost.

[0004] In addition, at present, the gas stoves on the market cannot control each flame ring independently, and there is still much room for improvement in this respect.

SUMMARY

[0005] An object of the present application is to provide a novel method for manufacturing gas stoves, which allows gas stoves with different flame control modes to be produced based on a general rough-machined part, so that gas stoves meeting different requirements of users in different countries or regions for flame control modes can be manufactured at lower production cost.

[0006] Another object of the present application is to provide a gas stove with various flame control modes manufactured based on the method of the present application, in particular to provide a novel gas stove capable of independently controlling the flame size of each flame ring.

[0007] A first aspect of the present application provides a method for manufacturing a gas stove, which is capable of generating multiple concentric flame rings. The method includes: manufacturing a general rough-machined part for forming a burner base of a gas stove; and machining a gas passage in the rough-machined part to form the burner base according to one of multiple flame control modes, so that multiple flame rings can be controlled according to selected flame control mode.

[0008] In some embodiments, the step of manufacturing the rough-machined part includes casting to form the rough-machined part.

[0009] The method may further include: after the burner base is formed, mounting a plurality of injectors communicating with the gas passage at predetermined positions on the burner base, wherein the injectors are used to inject the gas in the gas passage.

[0010] The method may further include: after the burner base is formed, connecting the burner base with one or more gas pipelines according to the selected flame control mode.

[0011] The method may further include: after the burner base is formed, mounting a stove head provided with a gas mixing chamber and annularly arranged fire holes, wherein the gas mixing chamber is arranged to receive the gas injected by the injector according to the selected flame control mode and inject the gas from the fire holes after being mixed with air.

[0012] In some embodiments, the step of manufacturing the rough-machined part includes manufacturing a rough-machined part having the following configuration: the rough- machined part includes a linear first section, a linear second section, a linear third section and a linear fourth section, wherein the first section, the second section, and the third section are spaced apart from each other and connected to the fourth section at different intersections, and the third section is located between the first section and the second section. [0013] In some embodiments, the first section, the second section, and the third section are parallel to each other, and the fourth section is perpendicular to the first section, the second section, and the third section.

[0014] In some embodiments, the first section is configured to mount an injector at a predetermined position for supplying gas to an outer flame ring, the second section is configured to mount an injector at a predetermined position for supplying gas to a middle flame ring, the third section and the fourth section are configured to mount an injector at a predetermined position on the junction of the third section and the fourth section for supplying gas to an inner flame ring.

[0015] In some embodiments, the first section is configured to have two predetermined positions on both sides of the fourth section for mounting two injectors.

[0016] In some embodiments, the step of machining a gas passage inside the rough-machined part includes: forming a first gas inlet at an end of the first section, forming a second gas inlet at an end of the second section, forming a third gas inlet at an end of the third section, and machining three independent gas passages along the first section, the second section and the third section, so that the injector to be mounted on the first section only communicates with the first gas inlet, the injector to be mounted on the second section only communicates with the second gas inlet, and the injector to be mounted at the junction of the third section and the fourth section only communicates with the third gas inlet, thereby enabling the outer flame ring, the middle flame ring and the inner flame ring to be controlled independently.

[0017] In some embodiments, the step of machining a gas passage inside the rough-machined part includes: forming a gas inlet at an end of the first section or the second section, and machining a gas passage along the first section, the second section and the fourth section, so that the injector to be mounted on the first section, the injector to be mounted on the second section and the injector to be mounted at the junction of the third section and the fourth section all communicates with the gas inlet, thereby enabling the outer flame ring, the middle flame ring and the inner flame ring to be jointly controlled.

[0018] In some embodiments, the step of machining a gas passage inside the rough-machined part includes: forming a gas inlet at an end of the first section or the second section, machining a gas passage along the first section, the second section and the fourth section, so that the injector to be mounted on the first section and the injector to be mounted on the second section only communicates with the gas inlet; forming another gas inlet at an end of the third section, and machining a gas passage along the third section, so that the injector to be mounted at the junction of the third section and the fourth section only communicates with the another gas inlet, thereby enabling the outer flame ring and the middle flame ring to be controlled together and the inner flame ring to be controlled individually.

[0019] A second aspect of the present application provides a gas stove manufactured according to the method of the first aspect.

[0020] In some embodiments, the gas stove includes a stove head base and an outer cap and an inner cap mounted on the stove head base, wherein the outer cap is provided with outer ring fire holes for generating an outer flame ring and middle ring fire holes for generating a middle flame ring, and the inner cap is provided with inner ring fire holes for generating an inner flame ring.

[0021] In some embodiments, the stove head base, the outer cap and the inner cap jointly define a first gas mixing chamber, a second gas mixing chamber and a third gas mixing chamber spaced apart from each other, wherein the first gas mixing chamber is in communication with the outer ring fire holes, the second gas mixing chamber is in communication with the middle ring fire holes, and the third gas mixing chamber is in communication with the inner ring fire holes.

[0022] In some embodiments, the stove head base the outer cap and the inner cap jointly define two gas mixing chambers spaced apart from each other, wherein one of the gas mixing chambers is in communication with the outer ring fire holes and the middle ring fire holes, and another gas mixing chamber is in communication with the inner ring fire holes.

[0023] In the gas stove, the gas from the gas pipeline is directed into the gas mixing chamber through the gas passage inside the burner base. After the gas is fully mixed with air in the gas mixing chamber, it is ejected from the fire holes and burns to form flame rings. The gas flow path from the gas pipeline to the fire holes determines the flame control mode of each flame ring of the gas stove. The basic idea of the present application is to produce a variety of burner bases with the same external configuration but different internal gas passage configurations based on a general rough-machined part, which can be assembled with other general gas stove parts to form gas stoves with different flame control modes. Therefore, gas stoves with different flame control modes can be produced at lower manufacturing cost to meet different cooking requirements of users in different countries or regions. In particular, the present application further provides a gas stove that allows each flame ring to be controlled independently, so that the flame size and temperature in different areas are accurately controlled during cooking.

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Hereinafter, the embodiments of the present application are described by way of example only with reference to the drawings. In the drawings, same features or components are indicated by same reference numerals, and the drawings may not be drawn to scale. In the drawings:

[0025] FIG. 1 shows an overall schematic diagram of a gas stove according to an embodiment of the present application;

[0026] FIG. 2 shows a schematic perspective view of a burner assembly in a gas stove according to an embodiment of the present application;

[0027] FIG. 3 shows a cut-away perspective view of the burner assembly in FIG. 2;

[0028] FIG. 4 shows a cut-away exploded view of the burner assembly in FIG. 2;

[0029] FIG. 5 shows a cross-sectional view of the burner base of the burner assembly in FIG. 2;

[0030] FIG. 6 shows a flowchart of a gas stove manufacturing method according to an embodiment of the present application;

[0031] FIG. 7 shows a schematic perspective view of a rough-machined part for forming a burner base according to an embodiment of the present application;

[0032] FIG. 8 shows a cross-sectional view of a burner base according to another embodiment of the present application; and

[0033] FIG. 9A and FIG. 9B show cross-sectional views of a burner base according to yet another embodiment of the present application.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following description is essentially only illustrative, rather than intending to limit the present application and the application or usage thereof. It should be appreciated that, throughout all drawings, similar reference signs indicate the same or similar parts or features. Each drawing only illustratively shows the concept and principle of the embodiments of the present application, and does not necessarily show the specific dimensions and scales of various embodiments of the present application. Specific parts in specific drawings may be exaggerated to illustrate related details or structures of various embodiments of the present application.

[0035] In the description of the embodiments of the present application, the orientation terms related to "upper” and "lower" used herein are described according to the upper and lower position relationships of the views shown in the accompanying drawings. In practical applications, the positional relationships of "upper” and "lower" used herein may be defined according to actual conditions. These relationships may be reversed.

[0036] Flame control mode of a gas stove depends on the gas flow path from the gas pipeline to the fire holes. In a conventional gas stove, a gas flow path is mainly defined by a burner base which is directly communicated with a gas pipeline for injecting gas into a gas mixing chamber. The basic idea of the present application is to manufacture burner bases that define different gas flow paths but have the same external configuration based on a general rough- machined part, which can be adapted to other general gas stove parts, thereby producing gas stoves with different flame control modes at low cost.

[0037] To facilitate understanding, firstly, the overall configuration of a gas stove manufactured according to the method of the present application is introduced with reference to FIG. 1 to FIG. 5.

[0038] FIG. 1 shows an overall schematic diagram of a gas stove according to an embodiment of the present application. The gas stove 1 generates three substantially concentric flame rings. As shown in the figure, the gas stove 1 may include a burner assembly 10, an ignition switch 20, and a gas pipeline (not shown). Each ignition switch 20 is connected with the corresponding gas pipeline and burner assembly 10 to control the ignition, flameout and flame adjustment of the burner assembly 10. The gas stove 1 may further include parts well known in the art, such as an igniter, a flameout protection device, etc., which are not detailed in the drawings and are not described in detail in the following description.

[0039] FIG. 2 shows a schematic perspective view of a burner assembly in a gas stove according to an embodiment of the present application; FIG. 3 and FIG. 4 respectively show a cut-away perspective view and a cut-away exploded view of the burner assembly 10. In general, the burner assembly 10 may include: a burner base 110 communicating with the gas pipeline 30, a stove head base 120 supported on the burner base 110, and an outer cap 130 and an inner cap 140 supported on the stove head base 120. The stove head base 120, the outer cap 130 and the inner cap 140 together constitute the stove head of the gas stove, and are used for receiving the gas injected through the burner base 110, mixing the gas with the air, and spraying the mixed gas through three groups of fire holes arranged annularly for combustion to form flame rings.

[0040] The burner base 110 is provided with four injectors for injecting the gas from the gas pipeline 30 into the stove head: a first injector 150-1 and a second injector 150-2 for supplying gas to an outer flame ring, a third injector 150-3 that supplies gas to a middle flame ring, and a fourth injector 150-4 that supplies gas to an inner flame ring. The stove head base 120, the outer cap 130, and the inner cap 140 together define gas mixing chambers. After being fully mixed with air in the gas mixing chambers, the gas is sprayed and burned through the fire holes annularly arranged on the outer cap 130 and the inner cap 140 to form flame rings.

[0041] The outer cap 130 and the inner cap 140 are provided with three sets of fire holes for generating three substantially concentric flame rings. Referring to FIG. 3 and FIG. 4, the outer cap 130 is generally annular and includes an annular top wall 131, an outer peripheral wall 132 extending downward from the outer periphery of the top wall 131, and an inner peripheral wall 133 extending downward from the inner periphery of the top wall 131. A set of outer ring fire holes 134 for generating the outer flame ring is circumferentially provided along the outer peripheral wall 132, and a set of middle ring fire holes 135 for generating the middle flame ring are circumferentially provided along the inner peripheral wall 133. The inner cap 140 is generally circular and is arranged in the center of the outer cap 130 approximately concentrically with the outer cap 130. The inner cap 140 includes a circular top wall 141 and a peripheral wall 142 extending downward along the periphery of the top wall 141. A set of circumferentially arranged inner ring fire holes 143 are provided along the peripheral wall 142, which are used to generate the inner flame ring.

[0042] Referring to FIG. 4, the stove head base 120 is generally circular, and its outer diameter is close to the outer diameter of the outer cap 130. On the top surface of the stove head base 120, multiple substantially concentric annular walls are provided, radially inward from the outer periphery of the stove head base 120 are an outer peripheral wall 121, a first partition wall 122, a second partition wall 123 and a third partition wall 124. In an assembled state, the outer peripheral wall 121 of the stove head base engages with the outer peripheral wall 132 of the outer cap 130, the third partition wall 124 engages with the inner peripheral wall 133 of the outer cap 130, and the third partition wall 124 engages with the peripheral wall 142 of the inner cap 140.

[0043] The top surface of the stove head base 120, the outer peripheral wall 121, the first partition wall 122 together with the top wall 131 and the outer peripheral wall 132 of the outer cap 130 jointly define a substantially annular first gas mixing chamber 160-1. The first gas mixing chamber 160-1 receives gas from the first injector 150-1 and the second injector 150-2 through Venturi pipes respectively aligned with the first injector 150-1 and the second injector 150-2, and this part of the gas is sprayed out through the outer ring fire holes 134 to form the outer flame ring.

[0044] The top surface of the stove head base 120, the first partition wall 122 and the second partition wall 123 together with the top wall 131 and the inner peripheral wall 133 of the outer cap 130 define a second gas mixing chamber 160-2 surrounded by the first gas mixing chamber 160-1. The second gas mixing chamber 160-2 receives the gas from the third injector 150-3 through a Venturi pipe aligned with the third injector 150-3, and this part of the gas is ejected through the middle ring fire holes 135 to form the middle flame ring.

[0045] The top surface of the stove head base 120, the third partition wall 124 together with the top wall 141 and the peripheral wall 142 of the inner cap 140 define a third gas mixing chamber 160-3. The third gas mixing chamber 160-3 receives the gas from the fourth injector 150-4 through a Venturi pipe aligned with the fourth injector 150-4, and this part of the gas is ejected through the inner ring fire holes 143 to form the inner flame ring.

[0046] It should be understood that although in this embodiment, a split stove head composed of the stove head base 120, the outer cap 130 and the inner cap 140 is used, an integrated stove head may be used instead.

[0047] The burner base 110 is connected to three independent gas pipelines via its internal gas passage. FIG. 5 shows a cross-sectional view of the burner base 110 taken along the axis of the gas passage. The first injector 150-1 and the second injector 150-2 are only communicated with the first gas pipeline 31 via the gas passage inside the burner base 110. The third injector 150-3 only communicates with the second gas pipeline 32, and the fourth injector 150-4 only communicates with the third gas pipeline 33.

[0048] Therefore, the three gas mixing chambers 160-1, 160-2 and 160-3 respectively corresponding to the three flame rings are separated from each other and supplied with gas by the independent first gas pipeline 31, second gas pipeline 32 and third gas pipeline 33. The ignition switch 20 shown in FIG. 1 can be connected to the first gas pipeline 31, the second gas pipeline 32, and the third gas pipeline 33 in a switchable manner. This makes it possible to independently control the three flame rings via the ignition switch 20, thereby respectively adjusting the gas consumption and flame size of the three flame rings.

[0049] The gas stove 1 described above is suitable for independently controlling three flame rings. According to the manufacturing method of the gas stove disclosed by the present application, the gas stove with other flame control modes can be manufactured only by simply modifying the gas passage inside the burner base 110 in the production process, so as to meet the requirements of users with different cooking habits.

[0050] FIG. 6 shows a flowchart of a gas stove manufacturing method according to an embodiment of the present application.

[0051] The method first includes a step SI of manufacturing a general rough-machined part for forming different burner bases. In this embodiment, the rough-machined part is a solid part made by a casting process, but it is also conceivable that the rough-machined part is made by other manufacturing processes. After forming the general rough-machined part, a machining step S2 is performed. In step S2, according to the required flame control mode, a corresponding gas passage is machined inside the rough-machined part to form a burner base. Then, step S3 of mounting the injector on the burner base, step S4 of connecting the gas pipeline and step S5 of mounting the stove head may be performed, wherein steps S3 to S5 need not be performed in a specific order. In case of producing gas stoves with different flame control modes, it is only necessary to form different gas passages by machining in step S2 and accordingly connect gas pipelines in different ways in step S4, while other steps need not be changed. In addition, various burner bases formed according to different flame control modes in step S2 can be adapted to general injectors, stove head bases, inner caps, outer caps and other gas stove components.

[0052] FIG. 7 shows a perspective view of an embodiment of the general rough-machined part 110' manufactured in step SI. As shown in FIG. 7, the rough-machined part 110' includes a linear first section 111, a linear second section 112, a linear third section 113, and a linear fourth section 114. The first section 111, the second section 112, and the third section 113 are spaced apart from each other and connected to the fourth section 114 at different intersections. The third section 113 is located between the first section 111 and the second section 112. The first section 111, the second section 112 and the third section 113 are preferably substantially parallel to each other. The fourth section 114 is preferably substantially perpendicular to the first section 111, the second section 112 and the third section 113, so as to facilitate subsequent machining processing. However, other angles between the four sections are also conceivable.

[0053] Four positions for mounting the first injector 150-1 to the fourth injector 150-4 are preset on the rough-machined part 110'. A first position 115-1 for mounting the first injector 150-1 and a second position 115-2 for mounting the second injector 150-2 are arranged on the first section 111 and located on both sides of the fourth section 114. A third position 115-3 for mounting the third injector 150-3 is located on the second section 112. In the assembled state, the third position 115-3 is closer to the inner peripheral wall 133 of the outer cap 130 than the first position 115-1 and the second position 115-2 in the radial direction of the outer cap 130. The fourth position 115-4 for mounting the fourth injector 150-4 is located at the junction of the third section 113 and the fourth section 114, and the fourth position 115-4 is located within the coverage of the inner cap 140 in the assembled state. In addition, the rough- machined part 110' may further include supporting parts 116-1, 116-2, and 116-3 for supporting the stove head base 120.

[0054] Referring back to FIG. 2 to FIG. 5, the method for manufacturing the above- mentioned gas stove 1 capable of independently controlling three flame rings is described in detail below.

[0055] First, the general rough-machined part 110' is formed in step SI.

[0056] In step S2, as shown in FIG. 5, a first gas inlet 117-1 is formed by drilling at one end (the right end in FIG. 5) of the first section 111 of the rough-machined part 110', and drilling continues along the first section 111 to reach below the far one of the first position 115-1 and the second position 115-2; a second gas inlet 117-2 is formed by drilling at one end (the right end in FIG. 5) of the second section 112, and drilling continues along the second section 112 to reach below the third position 115-3; a third gas inlet 117-3 is formed by drilling at one end (the right end in FIG. 5) of the third section 113, and drilling continues along the third section 113 to reach below the fourth position 115-4. In addition, holes are drilled down from the first position 115-1, the second position 115-2, the third position 115-3 and the fourth position 115-4, so that the first position 115-1 and the second position 115-2 communicate with the first gas inlet 117-1, the third position 115-3 communicates with the second gas inlet 117-2, and the fourth position 115-4 communicates with the third gas inlet 117-3. [0057] In step S3, the first injector 150-1 to the fourth injector 150-4 are mounted in the first position 115-1 to the fourth position 115-4 in one-to-one correspondence.

[0058] In step S4, as shown in FIG. 5, the first gas pipeline 31, the second gas pipeline 32 and the third gas pipeline 33 are respectively connected at the first gas inlet 117-1, the second gas inlet 117-2 and the third gas inlet 117-3. Therefore, the first injector 150-1 and the second injector 150-2 are communicated with the first gas pipeline 31 along a first gas passage 118-1 of the first section 111. The third injector 150-3 is communicated with the second gas pipeline 32 along a second gas passage 118-2 of the second section 112. The fourth injector 150-4 is communicated with the third gas pipeline 33 along a third gas passage 118-3 of the third section 113.

[0059] In step S5, as shown in FIG. 2 to FIG. 4, the stove head base 120 is supported and fixed above the burner base 110 by the supporting parts 116-1, 116-2 and 116-3 of the burner base 110. And the outer cap 130 and the inner cap 140 are joined with the stove head base 120 to form the first gas mixing chamber 160-1, the second gas mixing chamber 160-2 and the third gas mixing chamber 160-3. Thereby, two Venturi pipes communicated with the first gas mixing chamber 160-1 in the stove head base 120 are respectively aligned with the first injector 150-1 and the second injector 150-2; the Venturi pipe communicating with the second gas mixing chamber 160-2 in the stove head base 120 is aligned with the third injector 150-3; and the Venturi pipe communicating with the third gas mixing chamber 160-3 in the stove head base 120 is aligned with the fourth injector 150-4.

[0060] It will be understood that, although the above description is based on the order of steps SI to S5, steps S3 to S5 do not need to be performed in a specific order.

[0061] The gas stove 1 thus manufactured defines three independent gas flow paths leading from three gas pipelines to the outer ring fire holes 134, the middle ring fire holes 135 and the inner ring fire holes 143, respectively, thereby realizing independent control of the three flame rings.

[0062] The method according to the present application may also be used to manufacture gas stoves with other flame control modes.

[0063] In order to manufacture a gas stove in which three flame rings are controlled together, after forming the general rough-machined part 110' in step SI, the machining step S2 may alternatively be performed according to the gas passage configuration shown in FIG. 8 to form a burner base 110a according to another embodiment of the present application. [0064] FIG. 8 shows a cross-sectional view taken along the axis of the gas passage inside the burner base 110a. As shown in FIG. 8, in step S2, an opening 119-1 is drilled from one end (the right end in FIG. 8) of the first section 111, drilling continues along the first section 111 and holes are drilled down from the first position 115-1 and the second position 115-2, and thus a first gas passage 118- la is formed for communicating with the first injector 150-1 and the second injector 150-2; a gas inlet 117 is drilled from one end (the right end in FIG. 8) of the second section 112, drilling continues along the second section 112 and holes are drill down from the third position 115-3 to form a second gas passage 118-2a for communicating with the third injector 150-3; an opening 119-2 is drilled from one end (lower end in FIG. 8) of the fourth section, drilling continues along the fourth section 114 and holes are drilled down from the fourth position 115-4 to form a third gas passage 118-3a for communicating the first gas passage 118- la, the second gas passage 118-2a and the fourth injector 150-4 with each other.

[0065] Subsequently, in step S3, the first injector 150-1 to the fourth injector 150-4 are mounted in the first position 115-1 to the fourth position 115-4 in one-to-one correspondence. At step S4, the gas pipeline 30 is connected at the gas inlet 117, and the openings 119-1 and 119-2 at the ends of the first section 111 and the fourth section 114 are blocked by steel balls or other means. Alternatively, a gas inlet may be defined at the end of the first section 111 and connected to the gas pipeline 30, and the end openings of the second section 112 and the fourth section 114 may be blocked. Therefore, the first injector 150-1, the second injector 150-2, the third injector 150-3 and the fourth injector 150-4 are in communication with the gas pipeline 30. Then, step S5 of mounting the stove head base 120, the outer cap 130 and the inner cap 140 may be performed as described above.

[0066] The burner base 110a thus formed allows the first injector 150-1 to the fourth injector 150-4 to communicate with one gas pipeline 30. The ignition switch 20 shown in FIG. 1 is connected to a gas pipeline 30, so that three flame rings are controlled together.

[0067] In order to manufacture a gas stove in which the outer flame ring and the middle flame ring are controlled together and the inner flame ring is controlled separately, After forming the general rough-machined part 110’ in step SI, the machining step S2 may alternatively be performed according to the gas passage configuration shown in FIG. 9A and FIG. 9B to form a burner base 110b according to yet another embodiment of the present application. [0068] FIG. 9A and FIG. 9B show cross-sectional views taken along the axis of different gas passages inside the burner base 110b, where the cross-section shown in FIG. 9B is located on an upper layer of the cross-section shown in FIG. 9A. In order to control the outer flame ring and the middle flame ring together and the inner flame ring separately, in step S2, two gas inlets are formed in the rough-machined part 110' and two groups of gas passages which do not interfere with each other are machined in different layers of the rough-machined part 110'. One set of gas passages connects the first injector 150-1, the second injector 150-2, and the third injector 150-3 that supply gas for the outer flame ring and the middle flame ring with one gas inlet. Another set of gas passages connects the fourth injector 150-4 that supplies gas to the inner flame ring with another gas inlet.

[0069] As shown in FIG. 9 A, drilling is performed from one end (the right end in FIG. 9 A) of the first section 111 of the rough-machined part 110' and drilling is performed downward from the first position 115-1 and the second position 115-2, forming a first gas passage 118- 1b for communicating with the first injector 150-1 and the second injector 150-2; drilling is performed along the second section 112 from one end (right end in FIG. 9A) of the second section 112 and downward from the third position 115-3, forming a second gas passage 118- 2b for communicating with the third injector 150-3; a third gas passage 118-3b connecting the first gas passage 118-lb and the second gas passage 118-2b is drilled along the fourth section 114 from one end (lower end in FIG. 9A). Therefore, the gas passages shown in FIG. 9A are only used to communicate with the first injector 150-1, the second injector 150-2 and the third injector 150-3, but not with the fourth injector 150-4. As shown in FIG. 9B, drilling is performed along the third section 113 from one end (the right end in FIG. 9B) and downward from the fourth position 115-4 to form a fourth gas passage 118-4b for communication with the fourth injector 150-4. The opening at the end of the second section 112 is defined as a gas inlet 117-2b, and the opening at the end of the third section 113 is defined as another gas inlet 117-3b.

[0070] Subsequently, in step S3, the first injector 150-1 to the fourth injector 150-4 are mounted in the first position 115-1 to the fourth position 115-4 in one-to-one correspondence. At step S4, one gas pipeline 32b is connected at the gas inlet 117-2b, and another gas pipeline 33b is connected at the other gas inlet 117-3b. The openings 119-1 and 119-2 formed at the ends of the first section 111 and the fourth section 114 in the process of forming the first gas passage 118-la and the third gas passage 118-3a by machining are blocked by steel balls or other means. Alternatively, gas pipelines may be connected at the end openings of the first section 111 and the third section 113, and the end openings of the second section 112 and the fourth section 114 may be blocked. Then, step S5 of mounting the stove head base 120, the outer cap 130 and the inner cap 140 may be performed as described above.

[0071] The burner base 110b thus formed enables the first injector 150-1, the second injector 150-2 and the third injector 150-3 that supply gas for the outer flame ring and the middle flame ring to communicate with one gas pipeline 32b, and the fourth injector 150-4 for supplying gas to the inner flame ring communicates with another gas pipeline 33b. The ignition switch 20 shown in FIG. 1 can be connected to the gas pipelines 32b, 33b in a switchable manner, so that the outer flame ring and the middle flame ring can be simultaneously controlled as a group, and the inner flame ring can be independently controlled.

[0072] In particular, since both the burner base 110a and the burner base 110b enable the outer flame ring and the middle flame ring to be controlled at the same time, the stove head base 120 described above can also be slightly modified. Specifically, the first partition wall 122 of the stove head base 120 may be perforated or removed, so that the first gas mixing chamber 160-1 and the second gas mixing chamber 160-2 jointly defined by the stove head base 120 and the outer cap 130 are communicated or merged into one large gas mixing chamber, so that gas and air can be fully mixed.

[0073] According to the gas stove manufacturing method disclosed in the present application, various burner bases capable of realizing different flame control modes can be manufactured based on general rough-machined parts, and other parts of the gas stove can be used universally. Therefore, gas stoves with different flame control modes are generated at lower manufacturing cost, and the requirements of different users can be met.

[0074] In the above embodiment, four injectors are provided to supply gas to the three flame rings, of which two injectors are provided for the outer flame ring, because the outer flame ring usually needs more gas, and the provision of two injectors makes the gas supply more uniform. However, those skilled in the art may also imagine that different numbers of injectors are provided, for example, one injector is provided for the outer flame ring.

[0075] Although the above specific embodiment is described by taking three flame rings as an example, those skilled in the art can imagine to produce gas stoves with fewer or more flame rings based on the general rough-machined parts of the burner base by the manufacturing method according to the present application, so that each flame ring can be controlled independently, jointly or in groups according to user requirements.

[0076] The exemplary embodiments of the present application have been described in detail, but it should be understood that the present application is not limited to the specific embodiments described and shown in detail above. Without departing from the spirit and scope of the present application, those skilled in the art can make various modifications and variations to the present application. All these modifications and variations fall within the scope of the present application. Moreover, all the members described herein can be replaced by other technically equivalent members.

Claims

1. A method for manufacturing a gas stove, the gas stove is capable of generating a plurality of concentric flame rings, wherein the method comprises: manufacturing a general rough-machined part for forming a burner base of the gas stove; and machining a gas passage in the rough-machined part to form the burner base according to one of a plurality of flame control modes, so that the plurality of flame rings can be controlled according to selected flame control mode.

2. The method according to claim 1, wherein manufacturing the rough-machined part comprises casting to form the rough-machined part.

3. The method according to claim 1, further comprising: after the burner base is formed, mounting a plurality of injectors communicating with the gas passage at predetermined positions on the burner base, wherein the injectors are used to inject the gas in the gas passage.

4. The method according to claim 3, further comprising: after the burner base is formed, connecting the burner base with one or more gas pipelines according to the selected flame control mode.

5. The method according to claim 4, further comprising: after the burner base is formed, mounting a stove head provided with a gas mixing chamber and annularly arranged fire holes, wherein the gas mixing chamber is arranged to receive the gas injected by the injector according to the selected flame control mode and inject the gas from the fire holes after being mixed with air.

6. The method according to any one of claims 1 to 5, wherein manufacturing the rough- machined part comprises manufacturing a rough-machined part having the following configuration: the rough-machined part comprises a linear first section, a linear second section, a linear third section and a linear fourth section, wherein the first section, the second section, and the third section are spaced apart from each other and connected to the fourth section at different intersections, and the third section is located between the first section and the second section.

7. The method according to claim 6, wherein the first section, the second section, and the third section are parallel to each other, and the fourth section is perpendicular to the first section, the second section, and the third section.

8. The method according to claim 6, wherein the first section is configured to mount an injector at a predetermined position for supplying gas to an outer flame ring, the second section is configured to mount an injector at a predetermined position for supplying gas to a middle flame ring, the third section and the fourth section are configured to mount an injector at a predetermined position on a junction of the third section and the fourth section for supplying gas to an inner flame ring.

9. The method according to claim 8, wherein the first section is configured to have two predetermined positions on both sides of the fourth section for mounting two injectors.

10. The method according to claim 8, wherein machining a gas passage inside the rough- machined part comprises: forming a first gas inlet at an end of the first section, forming a second gas inlet at an end of the second section, forming a third gas inlet at an end of the third section, and machining three independent gas passages along the first section, the second section and the third section, so that the injector to be mounted on the first section only communicates with the first gas inlet, the injector to be mounted on the second section only communicates with the second gas inlet, and the injector to be mounted at the junction of the third section and the fourth section only communicates with the third gas inlet, thereby enabling the outer flame ring, the middle flame ring and the inner flame ring to be controlled independently.

11. The method according to claim 8, wherein machining a gas passage inside the rough- machined part comprises: forming a gas inlet at an end of the first section or the second section, and machining a gas passage along the first section, the second section and the fourth section, so that the injector to be mounted on the first section, the injector to be mounted on the second section and the injector to be mounted at the junction of the third section and the fourth section all communicates with the gas inlet, thereby enabling the outer flame ring, the middle flame ring and the inner flame ring to be jointly controlled.

12. The method according to claim 8, wherein machining a gas passage inside the rough- machined part comprises: forming a gas inlet at an end of the first section or the second section, machining a gas passage along the first section, the second section and the fourth section, so that the injector to be mounted on the first section and the injector to be mounted on the second section only communicates with the gas inlet; forming another gas inlet at an end of the third section, and machining a gas passage along the third section, so that the injector to be mounted at the junction of the third section and the fourth section only communicates with the another gas inlet, thereby enabling the outer flame ring and the middle flame ring to be controlled together and the inner flame ring to be controlled individually.

13. A gas stove manufactured using the method according to any one of claims 1 to 12.

14. The gas stove according to claim 13, comprising a stove head base and an outer cap and an inner cap mounted on the stove head base, wherein the outer cap is provided with outer ring fire holes for generating an outer flame ring and middle ring fire holes for generating a middle flame ring, and the inner cap is provided with inner ring fire holes for generating an inner flame ring.

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15. The gas stove according to claim 14, wherein the stove head base, the outer cap and the inner cap jointly define a first gas mixing chamber, a second gas mixing chamber and a third gas mixing chamber spaced apart from each other, wherein the first gas mixing chamber is in communication with the outer ring fire holes, the second gas mixing chamber is in communication with the middle ring fire holes, and the third gas mixing chamber is in communication with the inner ring fire holes.

16. The gas stove according to claim 14, wherein the stove head base, the outer cap and the inner cap jointly define two gas mixing chambers spaced apart from each other, wherein one of the gas mixing chambers is in communication with the outer ring fire holes and the middle ring fire holes, and another gas mixing chamber is in communication with the inner ring fire holes.

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