Stove base plate, gas stove comprising same and design method of stove base plate

Abstract

The invention discloses a stove base plate, a gas stove comprising the same and a design method of the stove base plate. The stove base plate is provided with a containing space used for containing an injection pipe of the lower air inlet burner and a through structure, and the containing space is communicated with the outside through the through structure. The through structure comprises a first through part and a second through part, and the communication area of the second through part is larger than that of the first through part; relative to an air inlet of the injection pipe, the first through part is located on the side, deviating from the injection direction of the injection pipe, of the stove base plate, and the second through part is located on the side, facing the injection direction of the injection pipe, of the stove base plate. When the air pressure below the stove base plate is suddenly reduced, the air above the stove base plate is pumped out through the first through part and the second through part at the same time, and the reverse suction airflow deviating from the injection direction is smaller than the reverse suction airflow facing the injection direction, so that the air suction of the injection pipe is facilitated, and the combustion stability of the gas stove is ensured.

Description

Technical Field

[0001] The present invention relates to the field of cooking stoves, and particularly to a cooking stove chassis, a gas cooking stove including the same, and a design method of the cooking stove chassis. Background Art

[0002] Gas cooking stoves generally include side-air intake cooking stoves and bottom-air intake cooking stoves. Compared with traditional side-air intake cooking stoves, the design of bottom-air intake cooking stoves is more advanced. It sucks air from below the cooking stove to provide the oxygen required for combustion, making the combustion more efficient and fully improving the thermal efficiency. Generally, a bottom-air intake cooking stove is provided with a cooking stove chassis. A base, a gas stove, an ejector pipe, and a gas valve are all installed above the cooking stove chassis, and a ventilation cavity is provided below the cooking stove chassis to ensure air supply. The ejector pipe has an air inlet for ejecting air, and a damper is located at the air inlet, which is mostly an adjustable metal baffle or knob. By manually adjusting the opening degree of the damper, the amount of air entering the ejector pipe can be controlled, and the mixing ratio of gas and air can be adjusted to make the combustion flame at the base in an ideal state.

[0003] The air flow line of the external air flowing towards the ejector pipe is generally as follows: the bottom of the cooking stove chassis corresponding to the gas stove is provided with combustion air inlet holes, and the air outside the cooking stove passes through the ventilation cavity from bottom to top through the combustion air inlet holes and enters the cooking stove chassis, flows to the vicinity of the gas valve, and these airs are ejected by the ejector pipe and enter the ejector pipe through the damper of the ejector pipe (i.e., the air volume adjusting component at the air inlet). After the gas and air are mixed in an appropriate ratio, they are ignited.

[0004] Under the condition of long-term high-load combustion, some components of the bottom-air intake cooking stove, such as gas valves and battery boxes, are prone to overheating. Therefore, heat dissipation openings are provided at the positions of the cooking stove chassis corresponding to these components, and the heat dissipation openings are communicated with the ventilation cavity to ensure the effective dissipation of the heat of the components and avoid failures caused by overheating.

[0005] When the ventilation cavity below the bottom-air intake cooking stove is suddenly opened (for example, a drawer of a cabinet is pulled out), the air pressure below suddenly decreases, and the air in the accommodation space of the cooking stove chassis will flow reversely through the heat dissipation opening (below the gas valve) and the damper adjustment opening and be sucked back from above the cooking stove chassis into the ventilation cavity. The direction of this reverse suction air flow is different from the ejection direction of the ejector pipe, which will affect the suction of air by the ejector pipe, resulting in a reduction in the air entering the ejector pipe, unable to achieve effective ejection, and the gas and air cannot be fully mixed, causing the gas cooking stove to go out during the opening process of the cabinet door or drawer. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defect in the prior art that when the ventilation cavity of a bottom air inlet stove is opened, the direction of the back-drawn airflow is different from the ejection direction of the ejection pipe, causing the gas stove to be extinguished. A stove chassis, a gas stove including the same and a design method for the stove chassis are provided.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] A stove chassis, which has a storage space for accommodating an ejector pipe of a lower air inlet burner, the stove chassis is provided with a through structure, and the storage space is connected to the outside through the through structure;

[0009] The through structure comprises a first through portion and a second through portion, wherein a communication area of ​​the first through portion is smaller than a communication area of ​​the second through portion;

[0010] Relative to the air inlet of the ejector tube, the first through-portion is located on a side of the stove chassis away from the ejection direction of the ejector tube, and the second through-portion is located on a side of the stove chassis facing the ejection direction of the ejector tube.

[0011] In the technical solution, by providing the stove chassis and improving the setting scheme of the through structure, when the air pressure below the stove chassis suddenly decreases, the air above the stove chassis is simultaneously drawn out through the first through part and the second through part, and the airflow passing through the first through part is the reverse airflow away from the injection direction, and the airflow passing through the second through part is the reverse airflow toward the injection direction. Since the connection area of ​​the first through part is smaller than the connection area of ​​the second through part, the reverse airflow away from the injection direction is smaller than the reverse airflow toward the injection direction, which is conducive to the suction of air by the injection tube, achieving effective injection, and continuous and sufficient mixing of gas and air to ensure the combustion stability of the gas stove.

[0012] Preferably, the angle between the line connecting the first through portion and the air inlet of the ejection pipe and the straight line where the ejection direction is located is in the range of 0°-45°; and / or,

[0013] The angle between the line connecting the second through portion and the air inlet of the ejection pipe and the straight line where the ejection direction is located is in the range of 0°-45°.

[0014] In the present technical solution, by setting the connecting line of the first through portion and the air inlet of the ejection tube so that the angle range with the straight line where the ejection direction is located is 0°-45°, the direction of the backdraft airflow that deviates from the ejection direction can be further optimized, avoiding excessively large angle between the backdraft airflow direction and the ejection direction, causing turbulence problems, and further ensuring the combustion stability of the gas stove.

[0015] By setting the included angle range between the connection line of the second through portion and the air inlet of the ejector tube and the straight line where the ejection direction is located to be 0° - 45°, the reverse suction air flow direction towards the ejection direction can be further optimized, avoiding too large an included angle between the reverse suction air flow direction and the ejection direction and bringing about turbulent flow problems, and further ensuring the combustion stability of the gas stove.

[0016] Preferably, the accommodating space is also used to accommodate a heat source, and the opening of the first through portion in the accommodating space is arranged towards the heat source.

[0017] In this technical solution, by arranging the opening of the first through portion towards the heat source, the cold air drawn into the upper part of the chassis can effectively take away the heat of the heat source. Moreover, a convection can be formed between the opening of the first through portion and the hot air at the heat source to isolate heat for other structures in the accommodating space. The two aspects work together to reduce the temperature rise during the operation of the gas stove, prevent overheating, improve the safety of the gas stove, and extend the service life.

[0018] Preferably, the heat source includes one or more of a gas valve and a battery box.

[0019] In this technical solution, through the above settings, targeted heat dissipation design can be carried out, effectively reducing the temperature rise of the key components of the gas stove and further improving the safety of the gas stove.

[0020] Preferably, the accommodating space is also used to accommodate the base of the down - draft burner, and the second through portion is arranged close to the base.

[0021] In this technical solution, through the above settings, it is convenient for the cold air entering from the second through portion to take away the heat of the base (i.e., the heat of the burner head), further reducing the temperature rise during the operation of the gas stove and improving the safety of the gas stove.

[0022] Preferably, the through - structure further includes a third through portion, and the third through portion is located on the bottom wall of the stove chassis and directly below the base;

[0023] The connection area of the third through portion is smaller than the connection area of the first through portion.

[0024] In this technical solution, through the above settings, it is convenient for the base to achieve complete combustion by using the air entering from the third through portion, improving the thermal efficiency of the gas stove. At the same time, it avoids the generation of toxic gases due to incomplete combustion and improves the safety of the gas stove. Since the connection area of the third through portion is smaller than the connection area of the first through portion, when the air pressure suddenly decreases under the stove chassis, the reverse suction air flow passing through the third through portion is smaller, avoiding the reverse suction air flow directly interfering with the flame combustion at the base to ensure the combustion stability of the gas stove.

[0025] Preferably, the cooking appliance chassis further includes a closure member and an air damper adjustment opening corresponding to the air damper provided for the ejector tube, and the closure member can detachably block the air damper adjustment opening.

[0026] In this technical solution, through the above arrangement, it is convenient to adjust the air damper through the air damper adjustment opening. Moreover, when the air damper does not need to be adjusted, the closure member is installed to block the air damper adjustment opening, avoiding the backdraft air flow at the air damper adjustment opening from interfering with the ejection of the ejector tube when the air pressure suddenly decreases under the cooking appliance chassis, and further ensuring the combustion stability of the gas cooking appliance.

[0027] Preferably, the first through portion is located on the bottom wall of the cooking appliance chassis; and / or,

[0028] the second through portion is located on the side wall of the cooking appliance chassis; and / or,

[0029] the first through portion is composed of a plurality of through holes; and / or,

[0030] the second through portion is a single through hole.

[0031] In this technical solution, by arranging the first through portion on the bottom wall of the cooking appliance chassis, it is convenient to cool the structure near the bottom wall of the cooking appliance chassis through the cold air of the first through portion.

[0032] By arranging the second through portion on the side wall of the cooking appliance chassis, it is convenient to cool the structure away from the side wall of the cooking appliance chassis through the cold air of the second through portion.

[0033] By arranging the first through portion to be composed of a plurality of through holes, the resistance of the backdraft air flow passing through the first through portion can be increased, further reducing the flow rate of the backdraft air flow deviating from the ejection direction and ensuring the combustion stability of the gas cooking appliance.

[0034] By arranging the second through portion to be a single through hole, the resistance of the backdraft air flow passing through the second through portion can be reduced, further increasing the flow rate of the backdraft air flow towards the ejection direction and ensuring the combustion stability of the gas cooking appliance.

[0035] A gas cooking appliance, which includes:

[0036] The cooking appliance chassis as described above;

[0037] A down-draft burner, and an ejector tube of the down-draft burner is arranged in the accommodation space of the cooking appliance chassis.

[0038] In this technical solution, by providing this gas cooking appliance, the combustion stability of the gas cooking appliance can be ensured when the air pressure in the ventilation cavity of the gas cooking appliance suddenly decreases.

[0039] A method for designing a stove chassis, wherein the stove chassis has a storage space for storing an ejector pipe of a lower air inlet burner, and a through structure is provided to connect the storage space with the outside;

[0040] The design method of the stove chassis adjusts the connection area and number of the through-portions on the stove chassis based on the air inlet and the ejection direction of the ejection pipe;

[0041] Relative to the air inlet of the ejector pipe, a first through portion of the through structure is arranged on a side of the stove chassis away from the ejection direction of the ejector pipe, and a second through portion of the through structure is arranged on a side of the stove chassis facing the ejection direction of the ejector pipe, and a connecting area of ​​the second through portion is made larger than a connecting area of ​​the first through portion.

[0042] In the present design, by providing the design method of the stove chassis, the combustion stability of the gas stove can be ensured when the air pressure below the stove chassis suddenly decreases.

[0043] The positive and progressive effects of the present invention are:

[0044] By providing the stove chassis, the gas stove including the same, and the design method of the stove chassis, and improving the setting scheme of the through structure, when the air pressure below the stove chassis suddenly decreases, the air above the stove chassis is simultaneously drawn out through the first through part and the second through part, the airflow passing through the first through part is the reverse airflow away from the ejection direction, and the airflow passing through the second through part is the reverse airflow toward the ejection direction. Since the connection area of ​​the first through part is smaller than the connection area of ​​the second through part, the reverse airflow away from the ejection direction is smaller than the reverse airflow toward the ejection direction, which is beneficial to the ejection pipe to suck the air, realize effective ejection, and continuously and fully mix the gas and air, so as to ensure the combustion stability of the gas stove. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a schematic diagram of the three-dimensional structure of the stove chassis after removing the sealing piece according to Example 1 of the present invention.

[0046] Figure 2 It is a schematic diagram of the three-dimensional structure of the stove chassis of embodiments 1 and 2 of the present invention in the use state.

[0047] Figure 3 It is a schematic diagram of the three-dimensional structure at the air inlet of the ejector tube of Examples 1 and 2 of the present invention.

[0048] Figure 4 This is a schematic structural diagram of a block according to Example 1 of the present invention.

[0049] Figure 5 This is a flow chart of a method for designing a stove chassis according to Embodiment 3 of the present invention.

[0050] Description of the reference numerals:

[0051] In Figures 1 - 4 :

[0052] Cooker chassis 1

[0053] Accommodating space 11

[0054] First through-hole portion 121

[0055] Second through-hole portion 122

[0056] Third through-hole portion 123

[0057] Air damper adjustment opening 13

[0058] Sealing member 14

[0059] Snap-in portion 141

[0060] Ejector pipe 2

[0061] Air inlet 21

[0062] Air damper 22

[0063] Heat source 3

[0064] Base 41

[0065] First ejection direction A1

[0066] Second ejection direction A2 Detailed implementation manners

[0067] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the described embodiments.

[0068] Embodiment 1

[0069] As Figures 1 - 3 shown, this embodiment provides a cooker chassis 1, which has an accommodating space 11 for accommodating the ejector pipe 2 of the down-draft burner. The cooker chassis 1 is provided with a through-structure, and the accommodating space 11 communicates with the outside through the through-structure. In this embodiment, the through-structure is specifically a through-hole opened on the surface of the housing of the cooker chassis 1.

[0070] In this embodiment, the through-structure includes a first through-hole portion 121 and a second through-hole portion 122, and the communication area of the first through-hole portion 121 is smaller than that of the second through-hole portion 122.

[0071] Please refer back to Figure 2In this embodiment, the stove chassis 1 symmetrically accommodates the ejection pipes 2 of the two lower air inlet burners, so the ejection direction of the ejection pipe 2 includes a symmetrical first ejection direction A1 and a second ejection direction A2. In other embodiments, the number and position of the ejection pipes provided in the stove chassis can be various, refer to the prior art.

[0072] like Figure 1 and Figure 2 As shown, the setting positions of the first through portion 121 and the second through portion 122 on the stove chassis 1 need to be determined based on the setting position of the ejector tube 2. Specifically, relative to the air inlet 21 of the ejector tube 2, the first through portion 121 is located on the side of the stove chassis 1 away from the ejection direction of the ejector tube 2 (i.e., the first ejection direction A1 or the second ejection direction A2), and the second through portion 122 is located on the side of the stove chassis 1 facing the ejection direction of the ejector tube 2.

[0073] Through this structural arrangement, the first through-portion 121 is arranged on the side away from the ejection direction of the ejection tube 2, thereby ensuring the heat dissipation effect of the stove heat source (such as a gas valve, a battery box, etc.) arranged on the side away from the ejection direction of the ejection tube 2. At the same time, a second through-portion 122 is further arranged, and when the air pressure below the stove chassis 1 suddenly decreases, the air above the stove chassis 1 is simultaneously drawn out through the first through-portion 121 and the second through-portion 122, and the airflow passing through the first through-portion 121 is a reverse airflow away from the ejection direction, and the airflow passing through the second through-portion 122 is a reverse airflow toward the ejection direction. Since the connection area of ​​the first through-hole 121 is smaller than the connection area of ​​the second through-hole 122, the back-drawing airflow away from the ejection direction is smaller than the back-drawing airflow toward the ejection direction, so that the air in the cooker chassis 1 and between the first through-hole 121 and the second through-hole 122 flows toward the second through-hole 122 as a whole (i.e., flows toward the ejection direction). The ejection pipe 2 is located between the first through-hole 121 and the second through-hole 122, so making the air between the first through-hole 121 and the second through-hole 122 flow toward the second through-hole 122 as a whole is also beneficial to the ejection pipe 2 to draw air, realize effective ejection, and continuously and fully mix the gas and air to ensure the combustion stability of the gas cooker.

[0074] Please refer to Figure 2, in this embodiment, taking the first ejection direction A1 on one side of the accommodation space 11 as an example, the first through hole 121 and the second through hole 122 distributed on this side of the accommodation space 11 are distributed as follows: the included angle between the line connecting the first through hole 121 and the air inlet 21 of the ejection pipe 2 and the straight line where the first ejection direction A1 is located is α, and α = 30°, so as to further optimize the reverse suction air flow direction away from the ejection direction, avoid too large an included angle between the reverse suction air flow direction and the ejection direction, which brings about a turbulence problem, and further ensure the combustion stability of the gas stove. In other embodiments, the included angle between the line connecting the first through hole and the air inlet of the ejection pipe and the straight line where the ejection direction is located can also take other values within the range of 0° - 45°.

[0075] In this embodiment, the included angle between the line connecting the second through hole 122 and the air inlet 21 of the ejection pipe 2 and the straight line where the first ejection direction A1 is located is β, and β = 30°, so as to further optimize the reverse suction air flow direction towards the ejection direction, avoid too large an included angle between the reverse suction air flow direction and the ejection direction, which brings about a turbulence problem, and further ensure the combustion stability of the gas stove. In other embodiments, the included angle between the line connecting the second through hole and the air inlet of the ejection pipe and the straight line where the ejection direction is located can also take other values within the range of 0° - 45°.

[0076] In this embodiment, the accommodation space 11 is also used to accommodate the heat source 3. The opening of the first through hole 121 in the accommodation space 11 is arranged towards the heat source 3, so as to effectively guide the cold air ejected into the upper part of the chassis to take away the heat of the heat source 3. Moreover, a convection can be formed between the opening of the first through hole 121 and the hot air at the heat source 3 to isolate heat for other structures in the accommodation space 11. The two aspects together reduce the temperature rise during the operation of the gas stove, prevent overheating, improve the safety of the gas stove, and extend the service life. In other embodiments, the opening of the first through hole in the accommodation space can also be arranged towards other directions.

[0077] In this embodiment, the heat source 3 is a gas valve, so as to conduct targeted heat dissipation design, effectively reduce the temperature rise of the key components of the gas stove, and further improve the safety of the gas stove. In other embodiments, the heat source can also include one or more of a gas valve and a battery box.

[0078] In this embodiment, the accommodation space 11 is also used to accommodate the base 41 of the down-draft burner. The second through hole 122 is arranged close to the base 41, so that the cold air entering from the second through hole 122 can take away the heat of the base 41 (i.e., the heat of the burner head), further reducing the temperature rise during the operation of the gas stove and improving the safety of the gas stove. In other embodiments, the second through hole can also be arranged at other positions.

[0079] In this embodiment, the through-structure further includes a third through-portion 123 which is located on the bottom wall of the cooking appliance chassis 1 and directly below the base 41, so that the base 41 can achieve complete combustion by using the air entering through the third through-portion 123, improving the thermal efficiency of the gas cooking appliance, and at the same time avoiding the generation of toxic gases due to incomplete combustion and enhancing the safety of the gas cooking appliance. In other embodiments, the through-structure may not include the third through-portion.

[0080] In this embodiment, the connection area of the third through-portion 123 is smaller than that of the first through-portion 121, such that when the air pressure suddenly decreases below the cooking appliance chassis 1, the reverse suction air flow passing through the third through-portion 123 is relatively small, preventing the reverse suction air flow from directly interfering with the flame combustion at the base 41 to ensure the combustion stability of the gas cooking appliance. In other embodiments, the connection area of the third through-portion may also take a range greater than or equal to the connection area of the first through-portion.

[0081] In this embodiment, the cooking appliance chassis 1 further includes a closure member 14 and a damper adjustment opening 13 corresponding to the damper 22 of the injection pipe 2. The closure member 14 can detachably block the damper adjustment opening 13 to facilitate the adjustment of the damper 22 through the damper adjustment opening 13. Moreover, when the damper 22 does not need to be adjusted, the closure member 14 is installed to block the damper adjustment opening 13, preventing the reverse suction air flow at the damper adjustment opening 13 from interfering with the injection of the injection pipe 2 when the air pressure suddenly decreases below the cooking appliance chassis 1, further ensuring the combustion stability of the gas cooking appliance. Of course, in other embodiments, other structures may also be provided to facilitate the adjustment of the damper.

[0082] As Figure 4 shown, in this embodiment, the closure member 14 is a plug with a larger bottom and a smaller top and can be slightly deformed, and is provided with a plurality of clamping portions 141. When the cooking appliance chassis 1 is normally admitting air, due to the larger bottom of the closure member 14, it covers the lower part of the damper adjustment opening 13 to prevent air intake from the damper adjustment opening 13, disturbing the air flow in the accommodation space 11 and causing turbulence, which affects the injection of the injection pipe 2.

[0083] In the reverse suction air flow, the clamping portions 141 are clamped above the damper adjustment opening 13 to prevent the closure member 14 from falling off due to an excessive instantaneous reverse suction air flow and hitting other structures below the cooking appliance chassis 1. When the damper 22 needs to be adjusted, the closure member 14 is pinched tightly so that the clamping portions 141 are slightly deformed inward, and then it can be removed from the damper adjustment opening 13. In other embodiments, the closure member can also be set to other structures that cooperate with the damper adjustment opening.

[0084] In this embodiment, the first through-portion 121 is located on the bottom wall of the cooking appliance chassis 1, which can facilitate the cooling of the structure near the bottom wall of the cooking appliance chassis 1 by the cold air passing through the first through-portion 121. In other embodiments, the first through-portion can also be provided at other positions.

[0085] In this embodiment, the second through-hole portion 122 is located on the side wall of the cooking appliance chassis 1, which can facilitate the cooling of the structure far from the side wall of the cooking appliance chassis 1 by the cold air passing through the second through-hole portion 122. In other embodiments, the second through-hole portion can also be provided at other positions.

[0086] In this embodiment, the first through-hole portion 121 is composed of a plurality of through-holes, which can increase the resistance of the reverse extraction air flow passing through the first through-hole portion 121, further reduce the flow rate of the reverse extraction air flow deviating from the injection direction, and ensure the combustion stability of the gas cooking appliance. In other embodiments, the first through-hole portion can also be provided as a single channel or other structural forms.

[0087] In this embodiment, the second through-hole portion 122 is a single through-hole, which can reduce the resistance of the reverse extraction air flow passing through the second through-hole portion 122, further increase the flow rate of the reverse extraction air flow towards the injection direction, and ensure the combustion stability of the gas cooking appliance. In other embodiments, the first through-hole portion can also be provided as a single channel or other structural forms.

[0088] Embodiment 2

[0089] This embodiment provides a gas cooking appliance, which includes: the cooking appliance chassis 1 in Embodiment 1; a down-draft burner, and the injection pipe 2 of the down-draft burner is arranged in the accommodation space 11 of the cooking appliance chassis 1. This gas cooking appliance can ensure the combustion stability of the gas cooking appliance when the air pressure in the ventilation cavity of the gas cooking appliance suddenly decreases.

[0090] Embodiment 3

[0091] As Figure 5 shown, this embodiment also provides a design method for the cooking appliance chassis 1. The cooking appliance chassis 1 has an accommodation space 11 for accommodating the injection pipe 2 of the down-draft burner, and is communicated with the outside through a through-structure.

[0092] The design method of the cooking appliance chassis 1 adjusts the connection area and quantity of the through-hole portions on the cooking appliance chassis 1 based on the air inlet 21 and the injection direction of the injection pipe 2.

[0093] S1. Relative to the air inlet 21 of the injection pipe 2, a first through-hole portion 121 of the through-structure is arranged on the side of the cooking appliance chassis 1 departing from the injection direction of the injection pipe 2;

[0094] S2. A second through-hole portion 122 of the through-structure is arranged on the side of the cooking appliance chassis 1 towards the injection direction of the injection pipe 2, and the connection area of the second through-hole portion 122 is made larger than that of the first through-hole portion 121.

[0095] In this design solution, by providing a design method for the cooking appliance chassis 1, the stability of the combustion of the gas cooking appliance can be ensured when the air pressure suddenly decreases below the cooking appliance chassis 1.

[0096] Although the specific implementation manners of the present invention have been described above, those skilled in the art should understand that this is only an example illustration, and the protection scope of the present invention is defined by the appended claims. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A stove chassis, which has a storage space for accommodating an ejector pipe of a lower air inlet burner, the stove chassis is provided with a through structure, and the storage space is connected to the outside through the through structure, characterized in that: The through structure comprises a first through portion and a second through portion, wherein a communication area of ​​the first through portion is smaller than a communication area of ​​the second through portion; Relative to the air inlet of the ejector tube, the first through-portion is located on a side of the stove chassis away from the ejection direction of the ejector tube, and the second through-portion is located on a side of the stove chassis facing the ejection direction of the ejector tube.

2. The cooking appliance chassis according to claim 1, wherein, The angle between the line connecting the first through-portion and the air inlet of the ejection pipe and the straight line where the ejection direction is located is in the range of 0°-45°; and / or, The angle between the line connecting the second through portion and the air inlet of the ejection pipe and the straight line where the ejection direction is located is in the range of 0°-45°.

3. The cooking appliance chassis according to claim 1, characterized in that, The accommodation space is also used to accommodate a heat source, and the opening of the first through portion in the accommodation space is arranged toward the heat source.

4. The cooking appliance chassis according to claim 3, characterized in that, The heat source includes one or more of a gas valve and a battery box.

5. The cooking appliance chassis according to claim 1, characterized in that, The accommodating space is also used to accommodate a base of the down-wind burner, and the second through-portion is arranged close to the base.

6. The cooking appliance chassis according to claim 5, wherein The through structure further includes a third through portion, and the third through portion is located on the bottom wall of the stove chassis and directly below the base; A communication area of ​​the third through portion is smaller than a communication area of ​​the first through portion.

7. The cooking appliance chassis according to claim 1, characterized in that, The stove chassis also includes a closing piece and a damper regulating port corresponding to the damper of the ejection pipe, and the closing piece can detachably block the damper regulating port.

8. The cooking appliance chassis according to any one of claims 1-7, characterized in that, The first through-hole is located on the bottom wall of the stove chassis; and / or, The second through-hole is located on the side wall of the stove bottom plate; and / or, The first through-hole portion is composed of a plurality of through holes; and / or, The second through portion is a single through hole.

9. A gas stove, characterized in that, It includes: The stove chassis according to any one of claims 1 to 8; A down-wind burner, wherein the ejector pipe of the down-wind burner is arranged in the accommodating space of the stove chassis.

10. A design method for a cooking appliance chassis, characterized in that, The stove chassis has a storage space for accommodating the ejector pipe of the lower air inlet burner, and the storage space is connected with the outside world by providing a through structure; The design method of the stove chassis is to adjust the connection area and number of the through-portions on the stove chassis based on the air inlet and the ejection direction of the ejection tube; Relative to the air inlet of the ejector pipe, a first through portion of the through structure is arranged on a side of the stove chassis away from the ejection direction of the ejector pipe, and a second through portion of the through structure is arranged on a side of the stove chassis facing the ejection direction of the ejector pipe, and a connecting area of ​​the second through portion is made larger than a connecting area of ​​the first through portion.

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