A cooking hob

Abstract

The application discloses a stove and relates to the technical field of kitchen appliances, and aims at solving the problems of complex structure and high production cost of a double-ring fire burner. The stove comprises a base, a burner, an ejector pipe, a fire distributor and a fire cover. The burner is connected with the base and has a premixing cavity; the ejector pipe is connected with the burner and has an ejecting cavity, the ejecting cavity being communicated with the premixing cavity; the fire distributor is connected with the burner and has a gas passage and an air inlet, the air inlet being communicated with the gas passage and the premixing cavity, and the gas passage having a gas outlet; and the fire cover is connected with the fire distributor and is provided with a first fire hole and a second fire hole at the top, a first gas cavity, a second gas cavity and a communication port being formed between the fire cover and the fire distributor, the second gas cavity surrounding the first gas cavity, the first fire hole being communicated with the first gas cavity, the second fire hole being communicated with the second gas cavity, the communication port being communicated with the first gas cavity and the second gas cavity, the gas outlet being communicated with the first gas cavity and being located above the communication port. The stove is used for heating a pot.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a stove. BACKGROUND

[0002] Generally, a double-ring fire burner adopts a double-channel structure, that is, a double-ejector pipe structure, single-ring fire combustion and double-ring fire combustion are realized by independent control of the ejector pipe, but the double-channel structure is relatively complex and the production cost is relatively high. SUMMARY

[0003] Embodiments of the present application provide a stove which can realize single-ring fire combustion and double-ring fire combustion, and solve the problems of complex structure of the double-ring fire burner and high production cost.

[0004] To achieve the above-mentioned purpose, embodiments of the present application adopt the following technical solutions:

[0005] A stove comprises a base, a burner, an ejector pipe, a fire divider and a fire cover. The burner is connected with the base and has a premixing cavity. The ejector pipe is connected with the burner and has an ejecting cavity, fuel gas and primary air mixed gas enter the ejector pipe to reach the ejecting cavity, the ejecting cavity is communicated with the premixing cavity, and the mixed gas enters the premixing cavity from the ejecting cavity and is fully mixed in the premixing cavity. The fire divider is connected with the burner and has a gas passage and an air inlet, the air inlet is communicated with the gas passage and the premixing cavity, the mixed gas enters the gas passage from the premixing cavity through the air inlet, and the gas passage has at least one gas outlet, and the mixed gas is discharged from the gas outlet.

[0006] The fire cover is connected with the fire divider, and the top of the fire cover is provided with a first fire hole and a second fire hole, and a first gas cavity, a second gas cavity and a communication port are formed between the fire cover and the fire divider. The first gas cavity surrounds the gas outlet, the gas outlet is communicated with the first gas cavity, the mixed gas enters the first gas cavity from the gas outlet, the first fire hole is communicated with the first gas cavity, so that the mixed gas in the first gas cavity can be sprayed out through the first fire hole to form a flame. The second gas cavity surrounds the first gas cavity, the second fire hole is communicated with the second gas cavity, so that the mixed gas in the second gas cavity can be sprayed out through the second fire hole to form a flame. The communication port is communicated with the first gas cavity and the second gas cavity, so that the mixed gas in the first gas cavity enters the second gas cavity, and the mixed gas in the second gas cavity can be sprayed out through the second fire hole to form a flame. The gas outlet is located above the communication port, so as to ensure that the mixed gas enters the first gas cavity preferentially and is sprayed out for combustion through the first fire hole, and prevent the mixed gas from entering the second gas cavity directly through the communication port.

[0007] In this way, the mixed gas discharged from the gas outlet enters the first gas cavity, the mixed gas in the first gas cavity enters the second gas cavity through the communication port, the mixed gas in the first gas cavity is sprayed from the first fire hole on the first part and mixed with the secondary air to form an inner ring flame, and the mixed gas in the second gas cavity is sprayed from the second fire hole on the second part and mixed with the secondary air to form an outer ring flame. It should be understood that when the pressure and the amount of mixed gas are relatively small, only the inner ring flame exists at this time, which is referred to as single-ring fire combustion; when the pressure and the amount of mixed gas are relatively large, the inner ring flame and the outer ring flame exist at this time, which is referred to as double-ring fire combustion.

[0008] Specifically, when the stove of the present application is in double-ring fire combustion: the mixed gas enters the injection cavity of the injection pipe in a state of high pressure and large amount of gas, the flow of the gas injects the external primary air into the injection cavity of the injection pipe, the gas and the primary air in the injection cavity are preliminarily mixed to form mixed gas, the mixed gas enters the premixing cavity and is fully mixed and the pressure of the mixed gas is stabilized in the premixing cavity, and the mixed gas in the premixing cavity enters the gas distributor through the gas inlet. The mixed gas enters the first gas cavity through the gas outlet and the first fire hole to form a flame. After the first gas cavity is filled with mixed gas, the mixed gas enters the second gas cavity through the communication port and is sprayed through the second fire hole to form a flame.

[0009] When the stove of the present application is in single-ring fire combustion: the mixed gas enters the injection cavity of the injection pipe in a state of moderate pressure and moderate amount of gas, the flow of the gas injects the external primary air into the injection cavity of the injection pipe, the gas and the primary air in the injection cavity are preliminarily mixed to form mixed gas, the mixed gas enters the premixing cavity and is fully mixed and the pressure of the mixed gas is stabilized in the premixing cavity, and the mixed gas in the premixing cavity enters the gas distributor through the gas inlet. The mixed gas enters the first gas cavity through the gas outlet and the first fire hole to form a flame. After the first gas cavity is filled with mixed gas, all the mixed gas is sprayed through the first fire hole to burn, and no excess mixed gas enters the second gas cavity.

[0010] As can be seen from the above, the stove provided by the embodiments of the present application can realize single-ring fire combustion and double-ring fire combustion, and solves the problems of complex structure and high production cost of the double-ring fire combustion burner.

[0011] In some embodiments, the opening of the gas outlet faces upward and is located in the first gas cavity, which is beneficial to the mixed gas to enter the upper part of the first gas cavity preferentially, so that the mixed gas enters the first gas cavity preferentially.

[0012] In some embodiments, the gas distributor comprises a gas distribution disc connected to the burner head, and a gas cover connected to the gas distribution disc, a gas passage being formed between the gas distribution disc and the gas cover, the gas inlet being in communication with the gas passage and the premixing chamber, the mixed gas entering the gas passage from the premixing chamber, the gas inlet being formed on the gas distribution disc, and the gas outlet being formed on the gas cover, the mixed gas being discharged from the gas outlet.

[0013] In some embodiments, the fire cap comprises a cap plate, a first surrounding wall, a second surrounding wall and a third surrounding wall, the second surrounding wall being located between the first surrounding wall and the third surrounding wall, each of the first surrounding wall, the second surrounding wall and the third surrounding wall being located below the cap plate and connected to the cap plate, the first surrounding wall being connected to the gas cover, and the third surrounding wall being connected to the gas distribution disc, so that the fire cap is connected to the gas distribution disc, a first gas chamber being formed between the cap plate, the first surrounding wall, the second surrounding wall, the gas cover and the gas distribution disc, a second gas chamber being formed between the cap plate, the second surrounding wall, the third surrounding wall and the gas distribution disc, and a communication port being formed between the second surrounding wall and the gas distribution disc to communicate the first gas chamber and the second gas chamber.

[0014] In this way, the first gas chamber surrounds the gas outlet, the mixed gas enters the first gas chamber from the gas outlet, the first gas chamber is in communication with the first fire hole, so that the mixed gas in the first gas chamber can be sprayed out through the first fire hole to form a flame, the second gas chamber surrounds the first gas chamber, the second fire hole is in communication with the second gas chamber, and the communication port communicates the first gas chamber and the second gas chamber, so that the mixed gas in the first gas chamber enters the second gas chamber.

[0015] In some embodiments, the cap plate comprises a first part and a second part, the second part surrounding the first part and being connected to the first part, the first part extending along an edge of the second part, the first surrounding wall being connected to an end of the first part away from the second part, the third surrounding wall being connected to an end of the second part away from the first part, and the second surrounding wall being connected to at least one of the first part and the second part.

[0016] In this way, the mixed gas discharged from the gas outlet enters the first gas chamber, the mixed gas in the first gas chamber enters the second gas chamber through the communication port, the mixed gas in the first gas chamber is sprayed out from the first fire hole on the first part and mixed with the secondary air to form an inner ring flame, and the mixed gas in the second gas chamber is sprayed out from the second fire hole on the second part and mixed with the secondary air to form an outer ring flame.

[0017] In some embodiments, the first fire hole is provided on the second part and penetrates the second part, the first fire hole being located adjacent to the first surrounding wall, the second fire hole is provided on the first part and penetrates the first part, an upper end of the first part is provided with a first protruding portion, and the second fire hole is provided on the first protruding portion.

[0018] In some embodiments, the gas cover comprises a first baffle, a second baffle, a third baffle and a fourth baffle which enclose the gas outlet, the first baffle and the second baffle are arranged in parallel, the third baffle and the fourth baffle are arranged in parallel, and the first baffle and the second baffle are connected between the third baffle and the fourth baffle. The second baffle is arranged adjacent to one side of the first baffle close to the first surrounding wall, the upper end surface of the first baffle is higher than the upper end surface of the second baffle, and a gap is formed between the second baffle and the second part of the cover plate. In this way, the mixed gas is blocked by the second baffle, and the mixed gas in the gas passage is preferentially supplied to the gap between the second baffle and the second part of the cover plate from the upper end of the second baffle, so that the mixed gas in the gas passage is preferentially supplied to the first gas cavity region on both sides of the gas passage through the first gas hole.

[0019] In some embodiments, the upper end surface of the third baffle and the upper end surface of the fourth baffle are both lower than the upper end surface of the second baffle. In this way, the mixed gas is preferentially supplied to the first gas cavity region on both sides of the gas passage through the gap between the third baffle and the second part, and then supplied to the first gas cavity region above the gas passage through the gap between the second baffle and the second part, so that the pressure of the mixed gas in the first gas cavity is more stable and the distribution is more uniform.

[0020] In some embodiments, the gas cover is provided with an air passage penetrating through the gas cover, the air passage is distributed on both sides of the gas cover, and the secondary air flows along the air passage, which can increase the amount of air near the fire cover, thereby facilitating the increase of the amount of secondary air around the fire hole to make the mixed gas burn fully.

[0021] In some embodiments, the gas stove further comprises an air inlet pipe and a plug valve, one end of the air inlet pipe being in communication with the ejector pipe. The plug valve comprises a valve body, a valve core, a valve rod, an adjusting inner core, a ball and a ball spring.

[0022] The valve body is formed with a valve cavity, an adjusting cavity, an inlet and an outlet, the inlet being in communication with the valve cavity and a gas source, and the outlet being in communication with the valve cavity and the other end of the air inlet pipe. The valve core is rotatably arranged in the valve cavity. The valve rod is fixedly connected with the valve core and the adjusting inner core, and is rotatable between a first position and a second position, the opening degree of the valve core gradually decreasing during the rotation of the valve rod from the first position to the second position. The adjusting inner core is rotatably arranged in the adjusting cavity, and a movement channel is formed between the adjusting inner core and the inner wall of the adjusting cavity. The adjusting inner core has a guide hole, the ball spring is fitted in the guide hole, the ball is rotatably fitted with the guide hole, and the rotation axis of the ball is parallel to the rotation axis of the valve rod, a part of the ball is located in the guide hole and presses the ball spring, and the other part of the ball is located in the movement channel and abuts against the inner wall of the adjusting cavity; the inner wall of the adjusting cavity is provided with a second protruding portion protruding towards the adjusting inner core, the second protruding portion has a convex arc surface, the second protruding portion is located in the movement channel and between the first position and the second position. In this way, the single-ring fire combustion and the double-ring fire combustion are distinguished. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings are included to provide a further understanding of the technical solutions of the present application, constitute a part of the specification and are used to explain the technical solutions of the present application together with the embodiments of the present application, and do not constitute a limitation on the technical solutions of the present application.

[0024] Figure 1 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0025] Figure 2 A structural schematic diagram of a stove is provided for the embodiments of the present application. Figure 1 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0026] Figure 3 A structural schematic diagram of a stove is provided for the embodiments of the present application. Figure 1 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0027] Figure 4 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0028] Figure 5 A structural schematic diagram of a stove is provided for the embodiments of the present application. Figure 4 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0029] Figure 6 A structural schematic diagram of a stove is provided for the embodiments of the present application. Figure 4 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0030] Figure 7 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0031] Figure 8 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0032] Figure 9 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0033] Figure 10 A structural schematic diagram of a stove is provided for the embodiments of the present application. Figure 5 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0034] Figure 11 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0035] Figure 12 A structural schematic diagram of a stove is provided for the embodiments of the present application. Figure 11 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0036] Figure 13 A structural schematic diagram of a stove is provided for the embodiments of the present application. Figure 11 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0037] Figure 14 A structural schematic diagram of a stove is provided for the embodiments of the present application.

[0038] Figure 15A structure schematic diagram of a cock valve provided by an embodiment of the present application.

[0039] Figure 16 For Figure 2 A local structure schematic diagram at H

[0040] Figure 17 For Figure 15 A schematic diagram of I-I section one, when the valve rod is in the first position.

[0041] Figure 18 For Figure 15 A schematic diagram of I-I section two, when the valve rod is in the second position.

[0042] Figure 19 A structure schematic diagram of a fire cover provided by an embodiment of the present application three.

[0043] Figure 20 A structure schematic diagram of a fire cover provided by an embodiment of the present application four.

[0044] Figure 21 For Figure 19 A schematic diagram of J-J section.

[0045] Figure 22 For Figure 20 A schematic diagram of K-K section.

[0046] Figure 23 For Figure 20 A schematic diagram of L-L section.

[0047] Figure 24 A structure schematic diagram of a fire cover provided by an embodiment of the present application five.

[0048] Figure 25 For Figure 20 A schematic diagram of M-M section.

[0049] Reference signs:

[0050] Stove 1; base 10;

[0051] Burner 11; premixing cavity 110;

[0052] Ejecting pipe 12; ejecting cavity 120;

[0053] Distributor 13; gas distribution disc 130; gas inlet 1300; gas cover 131; gas outlet 132; first baffle 1320; second baffle 1321; third baffle 1322; fourth baffle 1323; gas passage 133; air passage 134; second positioning part 135;

[0054] Fire cover 14; first fire hole 140; first main fire hole 1400; first auxiliary fire hole 1401; second fire hole 141; second main fire hole 1410; second auxiliary fire hole 1411; cover plate 142; first part 1420; second part 1421; first surrounding wall 143; second surrounding wall 144; third surrounding wall 145; groove body 146; first positioning part 147; first protruding part 148;

[0055] First gas cavity 15; second gas cavity 16; communication port 17;

[0056] Plug valve 18; valve body 1800; valve core 1801; valve rod 1802; adjusting inner core 1803; movement channel 1804; ball 1805; ball spring 1806; guide hole 1807; second protruding part 1808; convex camber 1809; adjusting cavity 1810;

[0057] Air inlet pipe 19; nozzle 20; fixing piece 21; air hole 22. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0059] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0060] The terms "first", "second", etc. are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0061] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, when describing the pipeline, the "connected" and "connected" used in the present application have the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0062] In the embodiments of the present application, the word "exemplary" or "for example" is used to mean serving as an example, instance, or illustration. Any implementation or design solution described in the embodiments of the present application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other implementations or design solutions. In fact, the word "exemplary" or "for example" is used to present concepts in a particular manner.

[0063] When the stove is working, gas enters the stove from the air inlet pipe, enters the injection pipe after being adjusted by the gas valve, and mixes with a part of air (this part of air is called primary air). These mixed gases enter the fire hole of the fire divider and are ignited by the ignition device to form flames (the air required during combustion is called secondary air). These flames are used to heat the cookware placed on the pot support.

[0064] Generally, a double-ring fire burner adopts a double-channel structure, i.e., a double-injection pipe structure, to realize single-ring fire combustion and double-ring fire combustion by independent control of the injection pipes. However, the double-channel structure is relatively complex and has a high production cost.

[0065] To realize single-ring fire combustion and double-ring fire combustion and solve the problem of complex structure and high production cost of the double-ring fire burner, the embodiments of the present application provide a stove. Hereinafter, the stove of the present application is described with reference to the accompanying drawings.

[0066] As shown in Figure 1 , the embodiments of the present application provide a stove 1, as shown in Figure 2 , which includes a base (not shown in the figure), a burner head 11, an injection pipe 12, a fire divider 13, and a fire cover 14. The burner head 11 is connected to the base 10 and has a premixing cavity 110. The injection pipe 12 is connected to the burner head 11 and has an injection cavity 120. The injection cavity 120 is in communication with the premixing cavity 110. Gas and primary air enter the premixing cavity 110 from the injection cavity 120 and are fully mixed into mixed gas in the premixing cavity 110.

[0067] As shown in Figure 3 and Figure 4As shown, the fire divider 13 has a gas passage 133 and an air inlet 1300, the fire divider 13 comprises a gas distribution disc 130 and a gas cover 131, the gas distribution disc 130 is connected with the furnace head 11 so that the fire divider 13 is connected with the furnace head 11, the gas cover 131 is connected with the gas distribution disc 130, the gas passage 133 is formed between the gas distribution disc 130 and the gas cover 131, the air inlet 1300 is arranged on the gas distribution disc 130 and communicates with the gas passage 133 and the premixing chamber 110, the mixed gas enters the gas passage 133 from the premixing chamber 110, and the gas outlet 132 is arranged on the gas cover 131 and discharges the mixed gas. The fire cap 14 is connected with the fire divider 13, and the top of the fire cap 14 is provided with a first fire hole 140 and a second fire hole 141, and the first gas chamber 15, the second gas chamber 16 and the communication port 17 are formed between the fire cap 14 and the fire divider 13.

[0068] On this basis, as shown in Figure 5 and Figure 6 , the fire cap 14 comprises a cap plate 142, a first surrounding wall 143, a second surrounding wall 144 and a third surrounding wall 145, the second surrounding wall 144 is located between the first surrounding wall 143 and the third surrounding wall 145, and each of the first surrounding wall 143, the second surrounding wall 144 and the third surrounding wall 145 is located below the cap plate 142 and connected with the cap plate 142. Referring to Figure 7 and Figure 8 , the first surrounding wall 143 is connected with the gas cover 131, and the third surrounding wall 145 is connected with the gas distribution disc 130 so that the fire cap 14 is connected with the gas distribution disc 130, the first gas chamber 15 is formed between the cap plate 142, the first surrounding wall 143, the second surrounding wall 144, the gas cover 131 and the gas distribution disc 130, the second gas chamber 16 is formed between the cap plate 142, the second surrounding wall 144, the third surrounding wall 145 and the gas distribution disc 130, and the communication port 17 is formed between the second surrounding wall 144 and the gas distribution disc 130 to communicate the first gas chamber 15 and the second gas chamber 16.

[0069] In this way, the first gas chamber 15 surrounds the gas outlet 132, the gas outlet 132 communicates with the first gas chamber 15, the mixed gas in the gas passage 133 enters the first gas chamber 15 through the gas outlet 132, the first fire hole 140 communicates with the first gas chamber 15 so that the mixed gas in the first gas chamber 15 can be sprayed out through the first fire hole 140 to form a flame, the second gas chamber 16 surrounds the first gas chamber 15, the second fire hole 141 communicates with the second gas chamber 16 so that the mixed gas in the second gas chamber 16 can be sprayed out through the second fire hole 141, and the communication port 17 communicates the first gas chamber 15 and the second gas chamber 16 so that the mixed gas in the first gas chamber 15 enters the second gas chamber 16.

[0070] Further, as shown in Figure 7 and Figure 8As shown, the cover plate 142 comprises a first part 1420 and a second part 1421, the second part 1421 surrounds the first part 1420 and is connected to the first part 1420, the first part 1420 extends along the edge of the second part 1421, the first surrounding wall 143 is connected to the end of the first part 1420 away from the first part 1420, the third surrounding wall 145 is connected to the end of the first part 1420 away from the first part 1420, and the second surrounding wall 144 is connected to the first part 1420.

[0071] It should be noted that the second surrounding wall 144 can also be connected to the second part 1421, or the second surrounding wall 144 is connected to both the first part 1420 and the second part 1421.

[0072] In this way, the mixed gas discharged from the gas outlet 132 enters the first gas cavity 15, the mixed gas in the first gas cavity 15 enters the second gas cavity 16 through the communication port 17, the mixed gas in the first gas cavity 15 is sprayed out of the first fire hole 140 on the first part 1420 and mixed with secondary air to form an inner ring flame, and the mixed gas in the second gas cavity 16 is sprayed out of the second fire hole 141 on the second part 1421 and mixed with secondary air to form an outer ring flame. When the mixed gas pressure and gas quantity are relatively small, only the inner ring flame exists at this time, which is called single-ring fire combustion; when the mixed gas pressure and gas quantity are relatively large, the inner ring flame and the outer ring flame exist at this time, which is called double-ring fire combustion.

[0073] On this basis, as shown in Figure 7 , the fire cover 14 is further provided with a groove body 146, the groove body 146 is arranged adjacent to the first surrounding wall 143, and the groove body 146 assists in igniting the mixed gas at the second fire hole 141 after the flame burns at the first fire hole 140.

[0074] In order to facilitate the connection of the fire cover 14 and the gas distributor 13, as shown in Figure 8 and Figure 9 , the fire cover 14 is provided with a first positioning part 147, the first positioning part 147 is a groove arranged on the fire cover, the first positioning part 147 is arranged adjacent to the first surrounding wall 143 and located on the side of the first surrounding wall 143 away from the third surrounding wall 145, the gas distributor 13 is provided with a second positioning part 135, the second positioning part 135 is arranged on the gas cover 131, and the second positioning part 135 is a protrusion arranged corresponding to the first positioning part 147, the first positioning part 147 cooperates with the second positioning part 135, the protrusion is clamped in the groove, so that the fire cover 14 is connected with the gas distributor 13, thereby the connection of the fire cover 14 and the gas distributor 13 is more convenient and fast.

[0075] In some embodiments, as shown in Figure 9As shown, the gas cover 131 comprises a first baffle 1320, a second baffle 1321, a third baffle 1322 and a fourth baffle 1323 which enclose the gas outlet 132. The first baffle 1320 and the second baffle 1321 are spaced apart, the third baffle 1322 and the fourth baffle 1323 are spaced apart, and the first baffle 1320 and the second baffle 1321 are both connected between the third baffle 1322 and the fourth baffle 1323. As shown in Figure 10 As shown, the second baffle 1321 is located on the side of the first baffle 1320 adjacent to the first enclosing wall 143. As shown in Figure 11 and Figure 12 As shown, the upper end surface of the first baffle 1320 is higher than the upper end surface of the second baffle 1321, that is, the distance L3 between the upper end surface of the first baffle 1320 and the bottom of the gas distribution disc 130 is greater than the distance L1 between the upper end surface of the second baffle 1321 and the bottom of the gas distribution disc 130. There is a gap between the second baffle 1321 and the second part 1421 of the cover plate 142, so that the mixed gas enters the first gas cavity 15 from the gas outlet 132.

[0076] In this way, the mixed gas is blocked by the second baffle 1321 and preferentially enters the gap between the second baffle 1321 and the second part 1421 of the cover plate 142 from the upper end of the second baffle 1321, so that the mixed gas in the gas passage 133 preferentially passes through the first fire hole 140.

[0077] It should be noted that the opening of the gas outlet 132 is upward, the gas outlet 132 is in communication with the first gas cavity 15 and is located in the first gas cavity 15, which is conducive to the mixed gas preferentially entering the upper part of the first gas cavity 15, so that the mixed gas preferentially enters the first gas cavity 15 and is sprayed out and burned from the first fire hole 140. The gas outlet 132 can be circular, fan-shaped, square, oval, etc., and the fan-shaped is preferred in the present application (see Figure 9 and Figure 11 ).

[0078] On this basis, the upper end surface of the third baffle 1322 and the upper end surface of the fourth baffle 1323 are both lower than the upper end surface of the second baffle 1321. It can be understood that the distance between the upper end surface of the third baffle 1322 and the bottom of the gas distribution disc 130 is the same as the distance between the upper end surface of the fourth baffle 1323 and the bottom of the gas distribution disc 130, which is conducive to the stable pressure of the mixed gas in the first gas cavity 15. (see Figure 12 )

[0079] The distance L1 between the upper end surface of the third baffle 1322 and the bottom of the gas distribution disc 130 and the distance L1 between the upper end surface of the fourth baffle 1323 and the bottom of the gas distribution disc 130 are both less than the distance L2 between the upper end surface of the second baffle 1321 and the bottom of the gas distribution disc 130.

[0080] In this way, the mixed gas is supplied to the first gas cavity 15 on both sides of the gas passage 133 through the gaps between the third baffle 1322 and the second part 1421 and between the fourth baffle 1323 and the second part 1421, and then through the gap between the second baffle 1321 and the second part 1421 to the first gas cavity 15 above the gas passage 133, so that the pressure of the mixed gas in the first gas cavity 15 is more stable and the distribution is more uniform.

[0081] Further, as shown in the figure, the height of the communication port 17 is limited by the position of the first fire hole 140, and the root of the first fire hole 140 is higher than the height L4 of the communication port 17. In this way, it is ensured that the mixed gas in the first gas cavity 15 is preferentially sprayed outwards through the first fire hole 140 for combustion, and the excess mixed gas enters the second gas cavity 16 from the first gas cavity 15, and finally enters the communication port 17, preventing the mixed gas discharged from the gas outlet 132 from directly entering the second gas cavity 16. Figure 13

[0082] Specifically, when the gas enters the injection cavity 120 of the injection pipe 12 in a moderate pressure and gas amount state, the flow of the gas induces external primary air into the injection cavity 120 of the injection pipe 12, the gas and the primary air in the injection cavity 120 are preliminarily mixed to form mixed gas, the mixed gas enters the premixing cavity 110, and the pressure of the mixed gas is fully mixed and stabilized in the premixing cavity 110, the mixed gas in the premixing cavity 110 enters the gas distributor 13 through the gas inlet 1300. The mixed gas enters the first gas cavity 15 through the gas passage 133 and the gas outlet 132, and is sucked out of the first fire hole 140 by the combustion suction caused by the combustion through the first fire hole 140 to mix with the secondary air for combustion. Since the root of the first fire hole 140 is higher than the height L4 of the communication port 17, it is ensured that the mixed gas preferentially passes through the first fire hole 140 rather than the communication port 17 to enter the second gas cavity 16. It should be understood that the pressure and gas amount of the mixed gas entering the second pressure stabilizing cavity at this time are insufficient to support the combustion of the second fire hole 141, that is, it is a single-ring fire combustion at this time.

[0083] ​The gas enters the injection cavity 120 of the injection pipe 12 at a high pressure and gas volume, the flow of the gas injects the external primary air into the injection cavity 120 of the injection pipe 12, the gas and the primary air in the injection cavity 120 preliminarily mix to form mixed gas, the mixed gas enters the premixing cavity 110, and the pressure of the mixed gas is fully mixed and stabilized in the premixing cavity 110, the mixed gas in the premixing cavity 110 enters the diffuser 13 through the gas inlet 1300. The mixed gas enters the first gas cavity 15 through the gas passage 133 and the gas outlet 132, and is sucked out of the fire hole by the combustion suction caused by the combustion, and then is combusted. At this time, the mixed gas is relatively large, and the excess mixed gas enters the second gas cavity 16 through the communication port 17, and the mixed gas is combusted by mixing with the secondary air through the second fire hole 141, and at this time, it is double-ring fire combustion.

[0084] In some embodiments, with reference to Figure 11 , the diffuser 13 is further provided with an air passage 134 penetrating through the diffuser 13 itself, the air passage 134 is distributed on both sides of the gas cover 131, the secondary air flows along the air passage 134, which can increase the amount of air near the fire cover 14, thereby facilitating the increase of the amount of secondary air around the fire hole, so as to make the mixed gas fully combusted.

[0085] The single-ring fire combustion and the double-ring fire combustion of the present application are distinguished in that the mixed gas pressure and the gas volume are large, the excess mixed gas enters the second gas cavity 16 through the communication port 17, and the mixed gas is combusted through the second fire hole 141. There is a critical state in the conveying process of the mixed gas: the mixed gas pressure and the gas volume are critical, a small amount of excess mixed gas enters the second gas cavity 16 through the communication port 17, but it is not enough to support the combustion of the mixed gas through the second fire hole 141.

[0086] In order to avoid that the mixed gas is not sprayed out of the second fire hole 141 for combustion, but diffused into the air, as shown in Figure 14 , the cooking appliance 1 further comprises a plug valve 18 and an air inlet pipe 19. The plug valve 18 is used to communicate with a gas source and can adjust the flow of the gas. One end of the air inlet pipe 19 communicates with the injection pipe 12.

[0087] As shown in Figure 15 , Figure 16 and Figure 17 , the plug valve 18 comprises a valve body 1800, a valve core 1801, a valve rod 1802, an adjusting inner core 1803, a ball 1805 and a ball spring 1806.

[0088] With reference to Figure 16 and Figure 17The valve body 1800 is formed with a valve cavity (not shown), an adjusting cavity 1810, an inlet 18000 and an outlet 18001. The inlet is connected to the valve cavity and a gas source, so that the gas can flow from the outlet into the valve cavity. The outlet is connected to the valve cavity and the other end of the gas inlet pipe 19, so that the gas in the valve cavity can flow from the outlet into the gas inlet pipe 19.

[0089] Referring to Figure 17 and Figure 18 The valve core 1801 is rotatably arranged in the valve cavity. The valve rod 1802 is fixedly connected with the valve core 1801 and can rotate between the first position m and the second position n. During the rotation of the valve rod 1802 from the first position m to the second position n, the valve core 1801 rotates from the first position m to the second position n along with the valve rod 1802. The opening degree of the valve core 1801 gradually increases, so as to increase the amount of gas flowing in.

[0090] The adjusting inner core 1803 is rotatably arranged in the adjusting cavity 1810. The valve rod 1802 is fixedly connected with the adjusting inner core 1803 and can rotate between the first position m and the second position n. The adjusting inner core 1803 rotates from the first position m to the second position n along with the valve rod 1802. The rotation axis of the ball 1805 is parallel to the rotation axis of the valve rod 1802. The ball 1805 rotates from the first position m to the second position n along with the valve rod 1802.

[0091] The adjusting inner core 1803 is rotatably arranged in the adjusting cavity 1810. The valve rod 1802 is fixedly connected with the adjusting inner core 1803 and can rotate between the first position m and the second position n. The adjusting inner core 1803 rotates from the first position m to the second position n along with the valve rod 1802. The rotation axis of the ball 1805 is parallel to the rotation axis of the valve rod 1802. The ball 1805 rotates from the first position m to the second position n along with the valve rod 1802.

[0092] The inner wall of the adjusting cavity 1810 is provided with a second protruding portion 1808 protruding towards the adjusting inner core 1803. The second protruding portion 1808 is located in the movement channel 1804 and between the first position m and the second position n. When the ball 1805 moves to the second protruding portion 1808, the second protruding portion 1808 presses the ball 1805. The second protruding portion 1808 has a convex arc surface 1809. The second protruding portion 1808 presses the ball 1805, so that the ball 1805 presses the spring. The ball 1805 cannot stay at the second protruding portion 1808, but will continue to move to the first position m or the second position n.

[0093] When the ball 1805 moves to the first position m, the valve stem 1802 does not rotate, and no gas enters the plug valve 18, and no flame is formed;

[0094] When the ball moves to the second position n, the valve core 1801 rotates with the valve stem 1802 from the first position m to the second position n, and the opening of the valve core 1801 is maximum, and the amount of gas entering is maximum at this time, and the mixed gas burns at the first fire hole 140 and the second fire hole 141 with maximum power;

[0095] Adjusting the inner core 1803 rotates with the valve stem 1802 to move the ball 1805 along the movement channel 1804 to the second protruding portion 1808, and the ball 1805 abuts against the second protruding portion 1808. Due to the extrusion of the ball spring 1806, the ball 1805 cannot stay at the second protruding portion 1808 and can continue to move to the second position n or the first position m. However, at this time, the amount of gas is insufficient to support the mixed gas to burn at the second fire hole 141, and the single-ring fire burns at this time.

[0096] Specifically, the valve stem 1802 is rotated, gas enters, and the ball 1805 moves along the movement channel 1804 from the first position m to the second position n. When the ball 1805 just contacts the second protruding portion 1808, the first fire hole 140 burns at maximum power at this time. When the ball 1805 continues to move to the second position n after passing through the second protruding portion 1808, the ball 1805 contacts the second protruding portion 1808 at this time. At this time, a small amount of mixed gas enters the second gas cavity 16 through the communication port 17, but the amount of gas is insufficient to support the mixed gas to burn through the second fire hole 141, and the single-ring fire still burns at this time. When the ball 1805 moves to the edge position of the second protruding portion 1808, that is, the ball 1805 just leaves the second protruding portion 1808 and continues to move to the second position n, the first fire hole 140 burns at maximum power at this time, and the excess mixed gas can burn at the second fire hole 141, that is, the single-ring fire is converted to double-ring fire. When the ball 1805 continues to move along the movement channel 1804 to the second position n, the first fire hole 140 and the second fire hole 141 both burn at maximum power.

[0097] In this way, the single-ring fire and the double-ring fire are distinguished.

[0098] It should be noted that the gas enters the inlet pipe 19 after being pressurized and controlled in flow by the plug valve 18. One end of the inlet pipe 19 is provided with a nozzle 20. One end of the injection pipe 12 connected with the inlet pipe 19 is provided with a fixing piece 21. The injection pipe 12 is formed with an injection cavity 120 and a wind hole 22 communicating with the injection cavity 120. The wind hole 22 is arranged adjacent to the inlet pipe 19 and is fixed to the injection pipe 12 through the fixing piece 21. The inlet pipe 19 is connected with the injection pipe 12, and the other end of the inlet pipe 19 is connected with the plug valve 18.

[0099] In this way, the mixed gas is pressurized and controlled by the plug valve 18 to enter the inlet pipe 19, and the mixed gas is accumulated at the nozzle 20 through the inlet pipe 19. The pressurized high-speed gas flow is injected into the ejector pipe 12 from the nozzle hole 200, and the high-pressure high-speed gas flow drives the external primary air to flow into the ejector pipe 12 from the air hole 22. The gas and primary air passing through the ejector pipe 12 are fully mixed in the ejector chamber 120 and the premixing chamber 110, and enter the diffuser 13 through the diffuser inlet 1300. The mixed gas enters the first gas chamber 15 through the gas passage 133. The mixed gas fills the first gas chamber 15 from top to bottom along the second part 1421 in the first gas chamber 15, and is sprayed out through the first main fire hole 1400 and the first auxiliary fire hole 1401 to form an inner ring flame. When there is more mixed gas, the mixed gas fills the first gas chamber 15, enters the second gas chamber 16 through the communication port 17, and is sprayed out through the second auxiliary fire hole 1411 and the second main fire hole 1410 to form an outer ring flame.

[0100] The flame generated by the fire hole of the common gas stove 1 usually heats the bottom of the pot to form a heating ring, and the central part is not heated by the flame, causing uneven heating of the bottom of the pot. When the stove 1 is in a single ring fire combustion state, the flame is scattered outward, and part of the heat is lost outward with the flue gas, resulting in low heating efficiency.

[0101] To solve the above problems, as shown in Figure 19 The first fire hole 140 further includes a first main fire hole 1400 and a first auxiliary fire hole 1401, both of which are arranged on the first part 1420 and penetrate through the first part 1420. The first auxiliary fire hole 1401 is arranged adjacent to the first surrounding wall 143, and the first main fire hole 1400 is arranged away from the first surrounding wall 143.

[0102] The number of fire holes is a main factor affecting the combustion effect of the flame, which is mainly related to the inner diameter D1 of the fire cap (refer to Figure 19 ) and the diameter D2 of the first main fire hole (refer to Figure 21 ). The larger the inner diameter D1 of the fire cap, the more the number of fire holes, and the smaller the number of fire holes. The inner diameter D2 of the fire cap is 20-100 mm, and the present application selects 40 mm. The diameter D2 of the first main fire hole is 1.0-3.2 mm, and the present application selects 2.5 mm. The diameter D3 of the first auxiliary fire hole (refer to Figure 22) is 0.5-2.5mm, and 1.5mm is selected in the present application. The number of the first main fire holes 1400 is 12-72, and the number of the first auxiliary fire holes 1401 is 12-72. According to the inner diameter D1 of the fire cap and the first main fire hole diameter D2, the number of the first main fire holes 1400 and the first auxiliary fire holes 1401 is both selected to be 24 in the present application. Moreover, the first main fire holes 1400 and the first auxiliary fire holes 1401 are regularly arranged with the center of the fire cap 14 as the center.

[0103] On this basis, referring to Figure 20 and Figure 21 , the first fire holes 140 are arranged obliquely inward and form a certain angle with the vertical and horizontal directions. Specifically, the first main fire holes 1400 form an angle a of 30-75° with the vertical direction, and 50° is selected in the present application; the first main fire holes 1400 form an angle b of 0-45° (referring to Figure 19 ) with the horizontal direction, and 30° is selected in the present application; and the first auxiliary fire holes 1401 form an angle c of 15-60° (referring to Figure 22 ) with the vertical direction, and 35° is selected in the present application.

[0104] Further, the first part 1420 forms an angle d of 40-90° (referring to Figure 22 ) with the vertical direction, and 60° is selected in the present application.

[0105] In this way, the flame at the first fire holes 140 rotates clockwise inward and burns, and the flame uniformly spreads over the bottom of the pot and extends from the center to the outside, which can prevent heat loss caused by the outward diffusion of smoke, and at the same time, the first fire holes 140 radiate heat to the first part 1420 during the burning process. The first part 1420 is in the shape of a disc and converges heat, so that the burning mode has an energy-converging effect, thereby increasing the thermal efficiency of gas combustion.

[0106] In order to save materials and reduce heat loss caused by flame heating materials, as shown in Figure 19 and Figure 20 , the second fire holes 141 include second main fire holes 1410 and second auxiliary fire holes 1411, and the second main fire holes 1410 and the second auxiliary fire holes 1411 are arranged on the second part 1421 and penetrate the second part 1421. The outer diameter D4 of the fire cap is 60-160mm, and 90mm is selected in the present application; the second main fire hole diameter D5 (referring to Figure 23 ) is 1.0-3.2mm, and 2.5mm is selected in the present application; and the second auxiliary fire hole diameter D6 (referring to Figure 23) is 1.0-3.0mm, and 2.0mm is selected in the present application. The number of the second main fire holes 1410 is 12-120, and the number of the second auxiliary fire holes 1411 is 12-240. According to the outer diameter D4 of the fire cover and the diameter D5 of the second main fire hole of the present application, the number of the second main fire holes 1410 and the second auxiliary fire holes 1411 is both selected to be 24. Moreover, the second main fire holes and the second auxiliary fire holes 1411 are regularly arranged with the center of the fire cover 14 as the center.

[0107] On this basis, the second fire holes 141 are arranged obliquely outward and at a certain angle with the vertical and horizontal directions. Specifically, the included angle e (refer to Figure 19 ) between the second main fire holes 1410 and the second auxiliary fire holes 1411 and the horizontal direction is 30-90°, and 55° is selected in the present application. The included angle f (refer to Figure 23 ) between the second main fire holes 1410 and the second auxiliary fire holes 1411 and the vertical direction is 0-60°, and 30° is selected in the present application.

[0108] Further, referring to Figure 24 , the upper end of the second part 1421 is provided with a first protruding part 148, and the second main fire holes 1410 and the second auxiliary fire holes 1411 are both arranged on the first protruding part 148. The number of the first protruding parts 148 is 12-72, and the ratio of the number of the second main fire holes 1410 to the first protruding parts 148 is 6:1.1, and 1:1 is selected in the present application. The ratio of the number of the second main fire holes 1410 to the first protruding parts 148 is 6:1.1, and 1:1 is selected in the present application, that is, the number of the second main fire holes 1410 and the second auxiliary fire holes 1411 is both 24,

[0109] In this way, the outer ring flame burns outward counterclockwise, and the flame extends outward from the edge of the inner ring flame and uniformly covers the bottom of the pot. At the same time, the second main fire holes 1410 and the second auxiliary fire holes 1411 are arranged on the first protruding part 148. Under the requirement of ensuring the depth of the fire holes of the second main fire holes 1410 and the second auxiliary fire holes 1411, the thickness L5 (refer to Figure 25 ) of the top wall of the fire cover 14 is reduced, which can save a lot of materials and reduce the heat loss caused by the flame heating the material.

[0110] In the description of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0111] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement within the technical scope disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A hob, characterized in that The utility model relates to a gas stove, comprising: a base; a burner head connected to the base and having a premixing chamber; an injector pipe connected to the burner head and having an injection chamber in communication with the premixing chamber; a burner connected to the burner head and having a gas passage and an air inlet in communication with the gas passage and the premixing chamber, the gas passage having at least one gas outlet; a burner cap connected to the burner and having a first burner hole and a second burner hole at the top, a first gas chamber, a second gas chamber and a communication port being formed between the burner cap and the burner; wherein the second gas chamber surrounds the first gas chamber, the first gas chamber surrounds the gas outlet, the first burner hole is in communication with the first gas chamber, the second burner hole is in communication with the second gas chamber, the communication port is in communication with the first gas chamber and the second gas chamber, and the gas outlet is in communication with the first gas chamber and located above the communication port; in the radial direction of the burner cap, the second burner hole is located outside the first burner hole, and the gas outlet is located between the first burner hole and the second burner hole; the burner includes a gas distribution disc and a gas cover, the gas distribution disc is connected to the burner head, the gas cover is connected to the gas distribution disc, the gas passage is formed between the gas cover and the gas distribution disc, the air inlet is formed on the gas distribution disc, and the gas outlet is formed on the gas cover; the gas cover includes a first baffle, a second baffle, a third baffle and a fourth baffle surrounding the gas outlet, the first baffle and the second baffle are arranged at intervals, the third baffle and the fourth baffle are arranged at intervals, the first baffle and the second baffle are connected between the third baffle and the fourth baffle, the second baffle is located adjacent to the first side of the first burner hole, the upper end surface of the first baffle is higher than the upper end surface of the second baffle, and the upper end surface of the second baffle has a gap with the burner cap.

2. A hob according to claim 1, characterized in that The opening of the gas outlet faces upwards and is located in the first gas chamber.

3. A hob according to claim 1, characterized in that the burner cap includes a cover plate, a first surrounding wall, a second surrounding wall and a third surrounding wall, the second surrounding wall is located between the first surrounding wall and the third surrounding wall, each of the first surrounding wall, the second surrounding wall and the third surrounding wall is located below the cover plate and connected to the cover plate, the first surrounding wall is connected to the gas cover, the third surrounding wall is connected to the gas distribution disc, the first gas chamber is formed between the cover plate, the first surrounding wall, the second surrounding wall, the gas cover and the gas distribution disc, the second gas chamber is formed between the cover plate, the second surrounding wall, the third surrounding wall and the gas distribution disc, and the communication port is formed between the second surrounding wall and the gas distribution disc.

4. A hob according to claim 3, characterised in that The cover plate comprises a first part and a second part surrounding the first part and connected to the first part, the first part extending along an edge of the second part, the first enclosing wall being connected to an end of the first part away from the second part, the third enclosing wall being connected to an end of the second part away from the first part, and the second enclosing wall being connected to at least one of the first part and the second part.

5. A hob according to claim 4, characterised in that The first fire hole is provided on the second part and penetrates the second part, and the first fire hole is arranged adjacent to the first enclosing wall; the second fire hole is provided on the first part and penetrates the first part, and an upper end of the first part is provided with a first protruding part, and the second fire hole is arranged on the first protruding part.

6. A hob according to claim 4, characterised in that The second baffle has a gap with the second part of the cover plate.

7. A hob according to claim 6, characterised in that Upper end faces of the third baffle and the fourth baffle are both lower than an upper end face of the second baffle.

8. A hob according to claim 1, characterized in that The air passage penetrates the fire divider.

9. A hob according to any one of claims 1-8, characterized in that The stove further comprises: An air inlet pipe, one end of the air inlet pipe being in communication with the ejector pipe; A plug valve comprising: A valve body formed with a valve cavity, an adjusting cavity, an inlet and an outlet, the inlet being in communication with the valve cavity and a gas source, and the outlet being in communication with the valve cavity and the other end of the air inlet pipe; A valve core rotatably arranged in the valve cavity; A valve rod fixedly connected with the valve core and the adjusting inner core and rotatable between a first position and a second position, the opening degree of the valve core gradually decreasing during rotation of the valve rod from the first position to the second position; An adjusting inner core rotatably arranged in the adjusting cavity, a movement channel being formed between the adjusting inner core and the inner wall of the adjusting cavity; A ball and a ball spring; The adjusting inner core has a guide hole, the ball spring is fitted in the guide hole, the ball is rotatably fitted with the guide hole, the rotation axis of the ball is parallel to the rotation axis of the valve rod, a part of the ball is located in the guide hole and presses the ball spring, another part of the ball is located in the movement channel and abuts against the inner wall of the adjusting cavity, the inner wall of the adjusting cavity is provided with a second protruding part protruding towards the adjusting inner core, the second protruding part has a convex arc surface, the second protruding part is located in the movement channel and between the first position and the second position.

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