Gas oven with air circulation

Abstract

The utility model discloses a gas oven with air circulation, which solves the problem that a motor used by a circulating fan in the prior art is greatly influenced by gas temperature and is easy to cause failure of the motor, and comprises a base provided with a combustion tube and an upper cover component matched with the base to form an oven inner cavity, the oven inner cavity is connected with an air circulation structure, and the upper cover assembly comprises an upper cover inner enclosure fixed to the base and an upper cover body hinged to the upper cover inner enclosure. The air circulation structure comprises a fan air inlet formed in the rear side of the inner enclosure of the upper cover, an inner air outlet, a heat circulation air duct communicating the fan air inlet with the inner air outlet and a circulation fan arranged corresponding to the fan air inlet, and hot air in the inner cavity of the oven is sucked into the heat circulation air duct through the fan air inlet and flows along the heat circulation air duct. And the air is blown out through the inner air outlet to form heat circulation. According to the utility model, the motor deviates right above the combustion tube, so that high-temperature gas cannot directly influence the motor.

Description

[Technical field]

[0001] The utility model belongs to the technical field of ovens, and in particular relates to a gas oven. [Background technology]

[0002] A gas oven with air circulation in the prior art comprises a base with a burner, an upper cover that cooperates with the base to form an oven cavity, and a grilling rail is provided at the bottom of the oven cavity above the burner. Referring to the Chinese utility model patent with the authorization announcement number CN 220141451U, a gas oven with a smoking function is disclosed. Since the temperature distribution in the oven cavity is not uniform enough, in order to realize the function of air circulation, the internal temperature in the oven cavity is made more uniform. A heat circulation air duct is arranged on the top of the upper cover, and a fan air inlet connected to the top air duct is arranged at the top of the upper cover corresponding to the central area above the grilling rail. The circulation fan is arranged above the fan air inlet, and the fan air inlet is directly opposite to the central area above the grilling rail. The hot air in the central area above the grilling rail is sucked into the heat circulation air duct by the circulation fan, and the hot air flows along the heat circulation air duct and finally blown back to the oven cavity. The circulation fan comprises a fan blade and a motor that drives the fan blade to rotate. The motor is not resistant to high temperatures, but because the motor is placed on the top of the upper cover, the flame generated by the burning burner sprays upward and the heat rises. Therefore, the motor located on the top of the upper cover is greatly affected by the gas temperature. After using the gas grill for a long time, the motor may fail, affecting the user experience. In addition, the gas grill has a fumigation function. When using the fumigation function, hot air circulation is not required and the circulation fan does not work. Since the fan air inlet is located at the top of the upper cover, the oil smoke generated during the barbecue process will also enter the hot circulation air duct due to the rising hot smoke. After long-term use, dirt will accumulate in the circulation fan and the hot circulation air duct. [Contents of the utility model]

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a gas oven with air circulation, which solves the problem that the motor used for the circulation fan in the prior art is greatly affected by the gas temperature and easily causes the motor to fail.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions: a gas oven with air circulation, comprising a base provided with a combustion tube, and an upper cover assembly cooperating with the base to form an oven cavity, a baking fence is provided above the combustion tube, the oven cavity is connected with an air circulation structure, the upper cover assembly comprises an upper cover inner enclosure fixed to the base and an upper cover body hinged to the upper cover inner enclosure, the air circulation structure comprises a fan inlet and an inner air outlet, a heat circulation air duct connecting the fan inlet and the inner air outlet, and a circulation fan arranged corresponding to the fan inlet, the hot air in the oven cavity is sucked into the heat circulation air duct by the fan inlet, flows along the heat circulation air duct, and is blown out through the inner air outlet.

[0005] Preferably, the fan air inlet is arranged in the middle position of the rear side of the inner enclosure of the upper cover, the heat circulation air duct is provided with two left and right branch air ducts, and the two inner air outlets are symmetrically arranged on the left and right sides of the fan air inlet, and the branch air ducts connect the circulation fan and the inner air outlets.

[0006] Preferably, the first branch air duct extends from the upper half of the circulation fan to the first inner air outlet, and the second branch air duct extends from the lower half of the circulation fan to the second inner air outlet.

[0007] Preferably, wind shielding walls are provided on two radially opposite sides of the circulation fan, and the wind shielding walls are arranged close to the circulation fan and connected to the branch air duct to separate two branch air ducts on two opposite sides of the circulation fan.

[0008] Preferably, the first branch air duct is provided with a horizontal section connected to the upper half of the circulation fan, an oblique section connected to the horizontal section and extending obliquely downward, and a vertical section connected to the oblique section and arranged at the lower half corresponding to the first inner air outlet; and / or, the second branch air duct extends horizontally corresponding to the height of the second inner air outlet.

[0009] Preferably, the axial directions of the fan air inlet and the inner air outlet are parallel to the grill plane, the diameter of the fan air inlet is larger than the diameter of the inner air outlet, and the center of the fan air inlet is higher than the center of the inner air outlet.

[0010] Preferably, an inner shell and an outer shell are provided on the rear side of the inner enclosure of the upper cover, an interlayer is provided between the inner shell and the outer shell, and duct blocking ribs are provided in the interlayer for connecting the inner shell and the outer shell to form the heat circulation air duct.

[0011] Preferably, the circulating fan comprises fan blades and a motor for driving the fan blades to rotate, and a projection of the motor on the plane where the combustion tube is located deviates backward from the combustion tube.

[0012] Preferably, the center of the motor is higher than the combustion tube by a distance H1, the front-to-back distance between the front end of the motor and the rear end of the combustion tube is H2, H1≥220mm, and H2≥88mm.

[0013] Preferably, a heat radiation plate is provided between the combustion tube and the grill.

[0014] The utility model adopts the above technical solution and has the following beneficial effects:

[0015] 1. The flame generated by the combustion of the combustion tube sprays upward and heats the food on the grill, and the heat keeps rising, so the temperature on the top of the upper cover is higher. Since the motor is placed on the upper cover enclosure, away from the top of the combustion tube, the high-temperature gas will not directly affect the motor, thus solving the problem that the motor used in the circulation fan in the prior art is greatly affected by the gas temperature and easily causes the motor to fail.

[0016] The combustion tube is connected to the inner cavity of the oven, so part of the heat generated by the combustion in the combustion tube moves the hot air upward into the inner cavity of the oven through thermal convection. The circulating fan draws the hot air in the inner cavity of the oven into the heat circulation air duct through the fan air inlet, and makes the hot air flow along the heat circulation air duct and blown into the inner cavity of the oven through the inner air outlet, thereby forming a heat circulation, making the temperature distribution in the inner cavity of the oven more uniform, improving the effect of baking food, and enhancing the user experience.

[0017] In addition, since the fan air inlet and inner air outlet are not located on the upper side of the upper cover, but on the inner enclosure of the upper cover, even if the circulation fan is not working, the oil smoke generated during the barbecue process will not directly flow to the fan air inlet and inner air outlet and enter the heat circulation air duct, thereby reducing and avoiding the degree of dirt accumulation in the circulation fan and the heat circulation air duct.

[0018] 2. The fan air inlet is arranged in the middle position of the left and right directions of the rear side of the inner enclosure of the upper cover, the heat circulation air duct is provided with two left and right branch air ducts, and the two inner air outlets are symmetrically arranged on the left and right sides of the fan air inlet. This is because the temperature in the central area of ​​the oven cavity is the highest, and the temperature in the two side areas is lower. Therefore, on the one hand, the hot air blown out from the inner air outlet will not affect the hot air in the central area being sucked into the fan air inlet. On the other hand, the fan air inlet sucks the hot air with higher temperature in the central area of ​​the oven cavity into the heat circulation air duct, and transports it from the two inner air outlets to the areas with lower temperature on both sides, thereby forming two heat convection cycles inside the oven, making the internal temperature of the oven cavity more uniform.

[0019] 3. The first branch air duct extends from the upper half of the circulation fan to the first inner air outlet, and the second branch air duct extends from the lower half of the circulation fan to the second inner air outlet. In this way, the areas where the left and right branch air ducts are connected to the circulation fan are roughly equal, and the amount of hot air delivered to the left and right branch air ducts under the action of the circulation fan is relatively consistent.

[0020] 4. Since wind shield walls are arranged on two radially opposite sides of the circulation fan, and the wind shield walls are arranged close to the circulation fan and connected to the branch air duct, two branch air ducts can be separated on two opposite sides of the circulation fan.

[0021] 5. While the left and right inner air outlets are set at the same height, the hot air is blown out evenly from the left and right inner air outlets through a circulating fan and two branch air ducts. Among them, the first branch air duct adopts a three-section structure, with the horizontal section and the vertical section connected by an oblique section in the middle, which can achieve wind direction changes while avoiding excessive noise. The second branch air duct extends horizontally to avoid excessive turns and reduce noise.

[0022] 6. Considering that part of the heat is transferred through heat circulation, the hot air blown out from the heat circulation air duct must be blown out horizontally and cannot be blown directly downward to the bottom area of ​​the upper cover, otherwise the hot air cannot be delivered to the heat circulation air duct. Therefore, the axial direction of the fan air inlet and the inner air outlet is parallel to the plane of the grill, and relatively speaking, the inner air outlet is higher than the grill by a certain height. In this way, the hot air can be blown out horizontally and blow over the food placed on the grill to ensure that the food is evenly heated.

[0023] 7. In order to form a heat circulation air duct on the rear side of the inner enclosure of the upper cover, a mezzanine is provided on the rear side of the inner enclosure of the upper cover, in which a heat circulation air duct is formed and a circulation fan is installed. At the same time, the mezzanine structure also has a heat insulation effect to avoid the heat in the inner cavity from being lost to the outside more quickly.

[0024] 8. The projection of the motor on the plane where the combustion tube is located deviates backward from the combustion tube, and the size design of the motor position and the distance between the motor and the combustion tube makes the motor far enough from the combustion tube in both horizontal and height directions to avoid the heat generated during the combustion process of the combustion tube from causing the motor to fail.

[0025] 9. After the combustion tube is ignited, part of the heat energy is transferred to the heat radiation plate. After the heat radiation plate is heated, the heat energy is transferred to the grill through heat radiation to heat the food.

[0026] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings.

Brief Description of the Drawings

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] Figure 1 It is a schematic diagram of the structure of the gas grill with the upper cover opened;

[0029] Figure 2 It is a schematic diagram of the structure of the gas grill with the upper cover closed;

[0030] Figure 3 The figure is a schematic diagram of the internal structure of a gas grill;

[0031] Figure 4 It is a structural schematic diagram of the heat circulation air duct;

[0032] Figure 5 It is a schematic diagram of the heat convection circulation inside the gas oven;

[0033] Figure 6 Schematic diagram of the relative position of the motor and the combustion tube;

[0034] Figure numerals: upper cover assembly 1, upper cover inner enclosure 100, upper cover body 11, circulation fan 12, motor 121, fan blades 122, heat circulation air duct 13, first branch air duct 1301, second branch air duct 1302, wind shield wall 1303, fan air inlet 131, inner air outlet 132, air duct shield rib 133, handle 14, base 2, box body 21, combustion tube 22, heat radiation plate 23, grill 24, gas cylinder 25, control panel 26, box door 27, baffle assembly 3. [Specific implementation method]

[0035] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0036] Those skilled in the art will appreciate that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0037] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the following words indicating orientation or positional relationship, such as "upper", "lower", "inner", "outer", "front", "back", etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] like Figures 1 to 6 As shown, this embodiment provides a gas oven, comprising a base 2, an upper cover assembly 1, and an oven cavity surrounded by the base 2 and the upper cover assembly 1. A combustion tube 22 is disposed on the base 2, and a grill 24 is disposed above the combustion tube 22 at the bottom of the oven cavity.

[0041] The inner cavity volume of the oven is much larger than that of ordinary air fryers and ovens, generally greater than 250000mm 3 In order to make the hot air inside the oven cavity circulate by convection to increase the temperature uniformity, the oven cavity is connected to an air circulation structure.

[0042] In this embodiment, the upper cover assembly 1 includes an upper cover inner enclosure 100 fixed to the base and an upper cover body 11 hinged to the upper cover inner enclosure. The upper cover inner enclosure 100 is U-shaped, including a rear side and left and right sides, with an open front side, and a semi-enclosed structure outside the oven. The left and right sides are right-angled trapezoidal structures, and hinges are usually set between the left and right side walls of the upper cover body 11 and the left and right sides of the upper cover inner enclosure 100, such as Figure 1 and Figure 2 As shown, the oven cavity is closed or opened by the upper cover body 11, and food to be baked is put in or taken out. After the upper cover body is closed, the oven cavity is closed and food can be baked.

[0043] like Figures 3 to 6 As shown, the air circulation structure includes a fan air inlet 131, an inner air outlet 132, a heat circulation air duct 13 connecting the fan air inlet and the inner air outlet, and a circulation fan 12 corresponding to the fan air inlet. The circulation fan 12 is usually a centrifugal fan, including a motor 121 and a fan blade 122. The circulation fan 12 draws the hot air in the oven cavity into the heat circulation air duct 13 through the fan air inlet 131, and makes the hot air flow along the heat circulation air duct 13 and blown into the oven cavity through the inner air outlet 132, thereby forming a heat cycle. The temperature distribution in the oven cavity is made more uniform, the effect of baking food is improved, and the user experience is enhanced.

[0044] The flame generated by the combustion of the combustion tube is ejected upward and heats the food on the grill, and the heat keeps rising, so the temperature of the top of the upper cover is relatively high. Since the motor is installed at the rear of the inner enclosure of the upper cover, away from the top of the combustion tube, the high-temperature gas will not directly affect the motor. This solves the problem in the prior art that the motor used in the circulation fan is greatly affected by the gas temperature, which easily leads to motor failure.

[0045] like Figure 6 As shown, the projection of the motor 121 on the plane where the combustion tube is located deviates backward from the combustion tube 22. Specifically, the center of the motor is higher than the combustion tube by a distance H1, and the front-to-back distance between the front end of the motor and the rear end of the combustion tube is H2, H1≥220mm, and H2≥88mm. Through the size design of the motor position and the spacing distance between the motor and the combustion tube, the distance between the motor and the combustion tube in the horizontal and height directions is far enough to prevent the heat emitted during the combustion of the combustion tube from causing the motor to fail.

[0046] The flame generated by the combustion of the combustion tube heats the food on the grill, and the heat rises. The combustion tube is connected to the inner cavity of the oven, so part of the heat energy of the combustion tube is used to transport the hot air upward through thermal convection, that is, to the inner cavity of the oven. The temperature is highest in the central area near the top of the upper cover in the upper part of the inner cavity of the oven, and the temperature in the side area is lower. Therefore, in this embodiment, the fan air inlet 131 is arranged in the middle position in the left and right directions of the rear side of the inner enclosure of the upper cover to suck the hot air with higher temperature in the middle area of ​​the inner cavity of the oven into the heat circulation air duct. The heat circulation air duct is provided with two left and right branch air ducts, and the inner air outlet 132 is provided with two and is symmetrically arranged on the left and right sides of the fan air inlet 131, and the branch air duct connects the circulation fan and the inner air outlet. Since two branch air ducts and two inner air outlets are provided at the same time, and the two inner air outlets are symmetrically arranged on the left and right sides of the fan air inlet, the hot air is blown back to the inner cavity of the oven from the inner air outlet through the two branch air ducts on the left and right sides. In this way, on the one hand, the hot air blown out of the inner air outlet will not affect the hot air in the central area from being sucked into the fan air inlet; on the other hand, the hot air forms two inner heat circulations in the inner cavity of the oven under the action of the circulating fan and the heat circulation air duct, and the hot air blown out of the two inner air outlets is just sent to the areas with originally lower temperatures on the left and right sides of the inner cavity of the oven, thereby making the temperature inside the inner cavity of the oven more uniform.

[0047] In addition, since the fan air inlet and inner air outlet are not located on the upper side of the upper cover, even if the circulation fan is not working, the oil smoke generated during the barbecue process will not directly flow to the fan air inlet and inner air outlet and enter the heat circulation air duct, because an external air vent is usually provided on the upper cover, and a part of the hot air in the inner cavity of the oven is discharged from the external air vent to balance a certain temperature in the inner cavity of the oven (i.e., a more suitable baking temperature). In this way, most of the oil smoke will be discharged from the external air vent, thereby reducing and avoiding the degree of dirt accumulation in the circulation fan and the heat circulation air duct.

[0048] In order to ensure that the amount of hot air delivered to the left and right branch air ducts under the action of a circulation fan is relatively consistent, specifically, the first branch air duct 1301 extends from the upper half of the circulation fan to the first inner air outlet, and the second branch air duct 1302 extends from the lower half of the circulation fan to the second inner air outlet. In this way, the areas where the left and right branch air ducts are connected to the circulation fan are roughly equal, and the amount of hot air delivered to the left and right branch air ducts under the action of the circulation fan is relatively consistent.

[0049] Furthermore, wind shielding walls 1303 are provided on two radially opposite sides of the circulation fan 12. The wind shielding walls 1303 are arranged close to the circulation fan and connected to the branch air duct to separate two branch air ducts on two opposite sides of the circulation fan.

[0050] In order to form a heat circulation air duct 13 on the rear side of the upper cover inner enclosure 100, an inner shell and an outer shell are provided on the rear side of the upper cover inner enclosure, and a sandwich is provided between the inner shell and the outer shell, and a duct blocking rib 133 is provided in the sandwich to connect the inner shell and the outer shell to form the heat circulation air duct, and the duct blocking rib 133 is connected to the wind shield wall 1303, and the connecting part of the duct blocking rib 133 and the wind shield wall 1303 adopts an arc transition. The heat circulation air duct 13 is formed in the sandwich and the circulation fan 12 is installed. At the same time, the sandwich structure also has a heat insulation effect, which prevents the heat in the inner cavity from being lost to the outside more quickly.

[0051] Considering that part of the heat is transferred through the heat cycle, the hot air blown out from the heat cycle air duct 13 must be blown out horizontally and cannot be blown directly downward to the bottom area of ​​the upper cover, otherwise the hot air cannot be delivered to the heat cycle air duct. Figure 3 and Figure 4 As shown, the axial directions of the fan air inlet 131 and the inner air outlet 132 are parallel to the plane of the grill. Since the air is taken in from one fan air inlet, but discharged from two inner air outlets, in order to ensure sufficient air intake and meet the air discharge from the two inner air outlets, the diameter of the fan air inlet 131 is larger than the diameter of the inner air outlet 132. And the center of the fan air inlet is higher than the center of the inner air outlet. Relatively speaking, the inner air outlet is higher than the grill by a certain height, that is, the lowest point of the inner air outlet is higher than the highest point of the grill, and the height above the grill can be less than 2 cm, for example, about 1 cm. In this way, the hot air can be blown through the food placed on the grill after being blown out horizontally, ensuring that the food is evenly heated. If the height above the grill is too high, the hot air will continue to flow upward in the middle area of ​​the oven cavity after being blown out horizontally and re-enter the heat circulation air duct, and the food cannot be effectively heated.

[0052] Since the air inlet and outlet of the first branch air duct are not at the same height, in order to avoid excessive noise, the first branch air duct adopts a three-section structure, such as Figure 4As shown, specifically, the first branch air duct 1301 is provided with a horizontal section connected to the upper half of the circulation fan, an oblique section connected to the horizontal section and extending obliquely downward, and a vertical section connected to the oblique section and corresponding to the lower half of the first inner air outlet, and the end of the vertical section is closed, so that the hot air is blown out from the first inner air outlet. The air inlet end and the air outlet end of the second branch air duct are designed at the same height, that is, the second branch air duct extends horizontally corresponding to the height of the second inner air outlet, and the end of the air duct is closed, so that the hot air is blown out from the second inner air outlet. In this way, while the left and right inner air outlets are set at the same height, the hot air is blown out from the left and right inner air outlets in a balanced manner through a circulation fan and two branch air ducts. The first branch air duct adopts a three-section structure, and the horizontal section and the vertical section are connected by an oblique section in the middle, so as to achieve the change of wind direction while avoiding excessive noise. The second branch air duct extends horizontally, which can avoid too many turns and reduce noise.

[0053] It is understandable that the first branch air duct 1301 and the second branch air duct 1302 can be structurally optimized to reduce noise. For example, the oblique section can be oblique with a certain curvature, and the position where the oblique section connects with the horizontal section and the vertical section adopts an arc transition. The arc transition design can reduce air turbulence, thereby reducing noise.

[0054] It is understandable that the two inner air outlets can also be arranged on the left and right sides of the inner enclosure of the upper cover respectively, so that the hot air blown out of the inner air outlets can be evenly distributed in the left and right directions of the oven cavity, and the hot air blown to the food on the grill is also uniform.

[0055] An air inlet filter can be set at the fan air inlet to prevent food debris from being sucked into the heat circulation air duct. The air inlet filter can adopt a concentric ring mesh structure. Of course, a filter can also be set at the inner air outlet.

[0056] Referring to the prior art, a heat radiation plate 23 is provided between the combustion tube 22 and the grill 24. After the combustion tube is ignited, a portion of the heat energy is transferred to the heat radiation plate, and after the heat radiation plate is heated, the heat energy is transferred to the grill through heat radiation to heat the food.

[0057] In addition, a handle 14 is provided at the front of the upper cover body to facilitate opening and closing the upper cover. Baffle assemblies 3 are provided on both sides of the top of the base. A control panel 26 is provided at the front of the top of the base, and control components such as valves for controlling the combustion tube are provided on the control panel 26. The base 2 is provided with a box body 21, and a gas bottle 25 is placed in the inner cavity of the box body, which is connected to the combustion tube through a gas pipe to supply gas to the combustion tube, and a box door 27 is provided at the front side. This can be convenient for outdoor use without natural gas.

[0058] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A gas oven with air circulation, comprising a base with a combustion tube, and an upper cover assembly that cooperates with the base to form an oven cavity, a grill is provided above the combustion tube, and the oven cavity is connected to an air circulation structure, characterized in that: The upper cover assembly includes an upper cover inner enclosure fixed to the base and an upper cover body hinged to the upper cover inner enclosure, the air circulation structure includes a fan air inlet, an inner air outlet, a heat circulation air duct connecting the fan air inlet and the inner air outlet, and a circulation fan arranged corresponding to the fan air inlet, the hot air in the inner cavity of the oven is sucked into the heat circulation air duct through the fan air inlet, flows along the heat circulation air duct, and is blown out through the inner air outlet.

2. A gas oven with air circulation according to claim 1, characterized in that: The fan air inlet is arranged in the middle position of the rear side of the inner enclosure of the upper cover, the heat circulation air duct is provided with two left and right branch air ducts, the two inner air outlets are symmetrically arranged on the left and right sides of the fan air inlet, and the branch air ducts connect the circulation fan and the inner air outlets.

3. A gas oven with air circulation according to claim 2, characterized in that: The first branch air duct extends from the upper half of the circulation fan to the first inner air outlet, and the second branch air duct extends from the lower half of the circulation fan to the second inner air outlet.

4. A gas oven with air circulation according to claim 3, characterized in that: Wind shielding walls are provided on two radially opposite sides of the circulation fan. The wind shielding walls are arranged close to the circulation fan and connected to the branch air duct to separate two branch air ducts on the opposite sides of the circulation fan.

5. A gas oven with air circulation according to claim 3, characterized in that: The first branch air duct is provided with a horizontal section connected to the upper half of the circulation fan, an oblique section connected to the horizontal section and extending obliquely downward, and a vertical section connected to the oblique section and arranged at the lower half corresponding to the first inner air outlet; and / or, the second branch air duct extends horizontally corresponding to the height of the second inner air outlet.

6. A gas oven with air circulation according to claim 2, characterized in that: The axial directions of the fan air inlet and the inner air outlet are parallel to the grill plane, the diameter of the fan air inlet is larger than the diameter of the inner air outlet, and the center of the fan air inlet is higher than the center of the inner air outlet.

7. A gas oven with air circulation according to claim 1, characterized in that: An inner shell and an outer shell are arranged at the rear side of the inner enclosure of the upper cover, an interlayer is arranged between the inner shell and the outer shell, and an air duct blocking rib is arranged in the interlayer to connect the inner shell and the outer shell to form the heat circulation air duct.

8. The gas oven with air circulation according to claim 1, characterized in that: The circulating fan comprises fan blades and a motor for driving the fan blades to rotate, and a projection of the motor on the plane where the combustion tube is located deviates backward from the combustion tube.

9. A gas oven with air circulation according to claim 8, characterized in that: The distance that the center of the motor is higher than the combustion tube is H1, and the front-to-back distance between the front end of the motor and the rear end of the combustion tube is H2, H1≥220mm, and H2≥88mm.

10. The gas oven with air circulation according to claim 1, characterized in that: A heat radiation plate is arranged between the combustion tube and the grill.

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