Air heater baffle and baking cooking equipment

Abstract

The utility model provides an air heater baffle and baking cooking equipment, the air heater baffle comprises a baffle body and a flow deflector, the baffle body comprises an air return plate and an air outlet plate which are respectively provided with an air return hole and a front air outlet hole, the air return plate is provided with an air return center line, and the air return plate and a hot air unit are sequentially arranged along the air return center line; the flow deflectors are arranged on the edges of the front air outlet holes and incline relative to the air outlet plate, each flow deflector comprises a starting end and a leading-out end which are sequentially arranged along the air return center line, and the change trend of the distance between each flow deflector and the air return center line is gradually increased from the starting end to the leading-out end.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen furniture, in particular to a hot air blower baffle and baking and cooking equipment. Background Art

[0002] Ovens and steam ovens are both baking cooking equipment. This type of equipment generates a circulating hot air flow through a hot air unit to gradually cook the food. The hot air flow first flows out of the hot air unit, then passes through the hot air blower baffle and enters the inner pot cavity. Then the hot air flow turns around and passes through the hot air blower baffle again, and finally the hot air flow returns to the hot air unit to end a cycle. Since it is difficult to form a uniform heat flow field in the inner pot cavity, existing baking cooking equipment requires users to place the baking tray containing food at a specific height position in the inner pot cavity to ensure that the food can be in the main circulation path of the hot air flow to the greatest extent. Otherwise, the food will be cooked evenly, and the food in some parts will be undercooked or burnt. Utility Model Content

[0003] In view of this, the utility model provides a hot air blower baffle and a baking cooking device which can form a uniform heat flow field to improve the cooking uniformity of food.

[0004] The utility model provides a hot air blower baffle plate comprising a baffle body and a guide plate, the baffle body comprising a return air plate and an air outlet plate respectively provided with a return air hole and a positive air outlet hole, the return air plate is constructed with a return air center line for the return air plate and the hot air unit to be arranged in sequence along the return air center line, the guide plate is arranged at the edge of the positive air outlet hole and is inclined relative to the air outlet plate, the guide plate comprises a starting end and an outlet end which are arranged in sequence along the return air center line, and a changing trend of the distance from the guide plate to the return air center line is: increasing from the starting end to the outlet end.

[0005] The baking and cooking equipment provided by the utility model comprises a hot air blower baffle.

[0006] The utility model of the hot air blower baffle and the baking cooking device have the following beneficial effects:

[0007] After the hot air unit is started, the hot air flow from the positive air outlet through the air outlet plate can form an embracing heat flow field in the inner pot cavity on the side of the baffle body away from the hot air unit. The characteristics of the embracing heat flow field are: the uniformity of the distribution and flow rate of the hot air flow in the inner pot cavity are improved, the velocity component of the hot air flow in the vertical direction is reduced, and the hot air flow rate and hot air flow rate at different height positions in the inner pot cavity are similar, so the cooking uniformity of the food can be improved, and the purpose of uniformly baking the food at any height position in the inner pot cavity can be achieved, and the probability of partial food being undercooked or burnt is reduced.

[0008] In some embodiments, the air outlet plate includes a front air outlet side and a rear air outlet side arranged opposite to each other. The guide vane is bent relative to the air outlet plate in an orientation away from the front air outlet side and protrudes from the rear air outlet side.

[0009] With such an arrangement, the guide vane will not intrude into the inner container cavity, and it is safer for the user to place and remove the baking tray containing food ingredients in the inner container cavity, and the hand will not be scratched by the guide vane.

[0010] In some embodiments, the outlet end is connected to the edge of the direct air outlet hole, and the guide vane matches the opening of the direct air outlet hole.

[0011] With such an arrangement, the guide vane and the air outlet plate can be processed by stamping the baffle of the hot air blower, and the baffle of the hot air blower obtained by stamping has higher strength and reliability.

[0012] In some embodiments, the opening edge of the direct air outlet hole includes a connecting edge and an opening edge. The connecting edge is connected to the outlet end. The shortest distance from the connecting edge to the return air center line is D1, and the longest distance from the opening edge to the return air center line is D2, and D1≥D2.

[0013] With such an arrangement, when the hot air unit is equipped with a centrifugal fan, the hot air flow first passes through the opening edge and then reaches the guide vane. The guide vane will not interfere with the hot air flow flowing towards the direct air outlet hole and passing through the air outlet plate, ensuring that the hot air flow has a large initial kinetic energy after entering the inner container cavity.

[0014] In some embodiments, the guide vane is a polygonal sheet structure, the opening shape of the direct air outlet hole is polygonal, and one side of the guide vane forms the outlet end and is connected to one side of the opening of the direct air outlet hole.

[0015] With such an arrangement, the guide vane and the direct air outlet hole are easier to obtain.

[0016] In some embodiments, the air outlet plate includes a first vertical side, a top side, and a second vertical side arranged in sequence around the return air plate. The direct air outlet hole includes an obliquely strip-shaped hole, and the guide vane includes an obliquely guiding vane. The obliquely guiding vane is connected to the long side of the obliquely strip-shaped hole, where:

[0017] At least one obliquely strip-shaped hole is located between the first vertical side and the top side and extends along the extension direction of the chamfer between the first vertical side and the top side; and / or,

[0018] At least one obliquely strip-shaped hole is located between the second vertical side and the top side and extends along the extension direction of the chamfer between the second vertical side and the top side.

[0019] With such an arrangement, the hot air flow passing through the air outlet plate from the diagonal strip-shaped holes and blowing into the inner container cavity obtains a velocity vector approaching the top wall of the inner container and a velocity vector approaching the side wall of the inner container under the guidance of the diagonal guide vanes. Therefore, these hot air flows will flow along the top wall and the side wall of the inner container based on the wall attachment effect, thereby expanding the spatial range of the circumferential heat flow field in the inner container cavity. The spatial volume that the circumferential heat flow field can encompass is larger, so that the food ingredients can be fully incorporated into this heat flow field, ensuring that all parts of the food ingredients can be cooked and the cooking degree of each part is uniform.

[0020] In some embodiments, the air outlet plate includes a first vertical side and a second vertical side arranged side by side and facing away from each other. The air return plate is located between the first vertical side and the second vertical side. The direct air outlet holes include vertical strip-shaped holes, and the guide vanes include vertical guide vanes. The vertical guide vanes are connected to the long sides of the vertical strip-shaped holes, where:

[0021] At least one vertical strip-shaped hole is parallel to the first vertical side and is opened between the air return plate and the first vertical side; and / or,

[0022] At least one vertical strip-shaped hole is parallel to the second vertical side and is opened between the air return plate and the second vertical side.

[0023] With such an arrangement, the hot air flow passing through the air outlet plate from the vertical strip-shaped holes and blowing into the inner container cavity obtains a velocity vector approaching the side wall of the inner container under the guidance of the vertical guide vanes. Therefore, these hot air flows will flow along the side wall of the inner container based on the wall attachment effect, so as to maximize the width dimension of the circumferential heat flow field, enabling the circumferential heat flow field to fully encompass the food ingredients in the width direction.

[0024] In some embodiments, the air outlet plate includes a first vertical side, a top side, and a second vertical side arranged in sequence around the air return plate. The air return plate is located between the first vertical side and the second vertical side. The direct air outlet holes include a first diagonal strip-shaped hole, a second diagonal strip-shaped hole, a first vertical strip-shaped hole, and a second vertical strip-shaped hole, where:

[0025] The first diagonal strip-shaped hole is opened between the first vertical side and the top side and extends along the extension direction of the chamfer between the first vertical side and the top side;

[0026] The second diagonal strip-shaped hole is opened between the second vertical side and the top side and extends along the extension direction of the chamfer between the second vertical side and the top side;

[0027] The first vertical strip-shaped hole is parallel to the first vertical side and is opened between the air return plate and the first vertical side;

[0028] The second vertical strip-shaped hole is parallel to the second vertical side and is opened between the air return plate and the second vertical side;

[0029] The first vertical side is symmetrical to the second vertical side with respect to the perpendicular bisector of the top side. The first diagonal strip-shaped hole is symmetrical to the second diagonal strip-shaped hole with respect to the perpendicular bisector of the top side. The first vertical strip-shaped hole is symmetrical to the second vertical strip-shaped hole with respect to the perpendicular bisector of the top side.

[0030] With such an arrangement, the hot air unit equipped with a fan capable of rotating forward and backward is suitable for being used in combination with the hot air blower baffle of the present utility model to form a baking and cooking device. In the direction perpendicular to the perpendicular bisector of the top side and parallel to the width direction of the baffle body, the uniformity of the ripening of the food materials can be ensured.

[0031] In some embodiments, the air return plate includes a first air return plate and a second air return plate arranged along the extension direction of the perpendicular bisector of the top side. The first diagonal strip-shaped hole and the second diagonal strip-shaped hole are located in the height range of the first air return plate. The first vertical strip-shaped hole and the second vertical strip-shaped hole are located in the height range of the second air return plate.

[0032] With such an arrangement, the hot air blower baffle of the present utility model is suitable for being used in combination with a double hot air unit to form a baking and cooking device with a larger inner cavity height dimension. The formed surrounding hot air flow field can match and occupy the inner cavity of the baking and cooking device to the greatest extent.

[0033] In some embodiments, the guide vanes include a first diagonal guide vane, a second diagonal guide vane, a first vertical guide vane and a second vertical guide vane. The first diagonal guide vane is connected to the long side of the first diagonal strip-shaped hole. The second diagonal guide vane is connected to the long side of the second diagonal strip-shaped hole. The first vertical guide vane is connected to the long side of the first vertical strip-shaped hole. The second vertical guide vane is connected to the long side of the second vertical strip-shaped hole.

[0034] With such an arrangement, more hot air flow blown out from the positive air outlet holes can be guided by the guide vanes and the flow velocity direction can be changed, so that more hot air flow flows along the inner wall surface of the inner cavity, further reducing the velocity component and momentum of the hot air flow in the vertical direction.

[0035] In some embodiments, the air outlet plate is connected to the outer peripheral edge of the air return plate. The baffle body further includes a side enclosure plate provided with side air outlet holes. The side enclosure plate is connected to the outer peripheral edge of the air outlet plate and protrudes from the air outlet plate. The positive air outlet holes and the side air outlet holes are alternately arranged around the air return plate.

[0036] With such an arrangement, after the hot air unit is started, the side air outlet holes can also blow hot air flow into the inner cavity as a supplement to ensure that there is sufficient hot air flow to heat the food materials, and the hot air flow blown out from the side air outlet holes will not be interfered or blocked by the guide vanes. The hot air flow field formed by the hot air flow blown out from the side air outlet holes and the hot air flow field formed by the hot air flow blown out from the positive air outlet holes will not affect each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1Structural schematic diagram of the baffle of a hot air blower according to an embodiment of the present utility model;

[0038] Figure 2 Partial structural schematic diagram of the baffle of a hot air blower according to an embodiment of the present utility model;

[0039] Figure 3 Front view of the baffle of a hot air blower according to an embodiment of the present utility model;

[0040] Figure 4 is Figure 3 Cross-sectional view of the baffle of the hot air blower shown in cross-section along the A-A plane;

[0041] Figure 5 is Figure 3 Cross-sectional view of the baffle of the hot air blower shown in cross-section along the B-B plane;

[0042] Figure 6 First schematic diagram of the partial structure of a baking and cooking device according to an embodiment of the present utility model;

[0043] Figure 7 is Figure 6 Cross-sectional view of the baking and cooking device shown in cross-section along the C-C plane.

[0044] Explanation of reference numerals: 10, return air plate; 101, first return air plate; 102, second return air plate; 11, return air holes; 20, air outlet plate; 201, front side of air outlet; 202, rear side of air outlet; 203, first vertical edge; 204, top edge; 205, second vertical edge; 206, bottom edge; 21, direct air outlet holes; 211, first obliquely strip-shaped holes; 212, second obliquely strip-shaped holes; 213, first vertically strip-shaped holes; 214, second vertically strip-shaped holes; 2101, connecting edge; 2102, open edge; 30, side enclosure plate; 31, side air outlet holes; 40, guide vanes; 401, first obliquely guiding vanes; 402, second obliquely guiding vanes; 403, first vertically guiding vanes; 404, second vertically guiding vanes; 41, starting end; 42, leading end; 50, inner container; 51, first side wall; 52, top wall; 53, second side wall; 54, bottom wall; 60, back plate; 71, first hot air unit; 72, second hot air unit; 81, first shelf; 82, second shelf; 83, third shelf; 84, fourth shelf; 85, fifth shelf; 91, first baking tray; 92, second baking tray. Detailed implementation manners

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0047] The utility model provides a hot air blower baffle and a baking cooking device including the hot air blower baffle, and the baking cooking device may specifically be a microwave oven, a steam oven, etc. In addition to the hot air blower baffle, the baking cooking device also includes a door panel, an inner tank 50, a back panel 60, a hot air unit, and a baking tray, the hot air blower baffle and the inner tank 50 are surrounded to form an inner tank cavity, the door panel and the hot air blower baffle are arranged opposite to each other and spaced apart, the door panel is used to close the inner tank cavity, the back panel 60 is arranged on the side of the hot air blower baffle away from the inner tank cavity, the hot air unit is installed between the hot air blower baffle and the back panel 60, the inner tank 50 includes a shelf arranged in the inner tank cavity, and the baking tray for holding food is placed on the shelf. When baking ingredients, the hot air unit is driven to generate hot air flow, which passes through the hot air blower baffle and enters the inner pot cavity, and then is sucked by the hot air unit to turn around and flow back, and passes through the hot air blower baffle again to return to between the hot air blower baffle and the back plate 60, and the hot air flow circulates in the order of the above-mentioned flow trajectory and heats the ingredients multiple times to make the ingredients cooked.

[0048] See also Figures 1 to 2, the hot air blower baffle of the present utility model includes a baffle body, which includes a return air plate 10 and an air outlet plate 20. The return air plate 10 is provided with a return air hole 11 with an opening facing the door panel. The air outlet plate 20 is connected to the outer peripheral edge of the return air plate 10 and is provided with a positive air outlet hole 21 with an opening facing the door panel. The hot air unit includes a fan installed between the hot air blower baffle and the back plate 60, and also includes a heat pipe arranged around the fan. The air flow generated after the fan rotates passes through the heat pipe and is heated to form a hot air flow. At least a part of the hot air flow passes through the positive air outlet hole 21, passes through the air outlet plate 20, enters the inner tank cavity and flows close to the door panel. During the rotation of the fan, a negative pressure area is formed, which is roughly coincident with the rotation axis of the fan. The suction effect of the negative pressure area on the hot air flow and the blocking effect of the door panel on the hot air flow cause the hot air flow to turn around and flow back. Therefore, the hot air flow approaches the hot air blower baffle and finally passes through the return air hole 11 and passes through the return air plate 10 to reach between the hot air blower baffle and the back plate 60. The hot air flow forms a heat flow field surrounding the food in the inner tank cavity.

[0049] Specifically, the return air plate 10 is configured with a return air center line. In some embodiments, the return air plate 10 is a circular plate structure. The air outlet plate 20 is connected to the circular outer peripheral edge of the return air plate 10. The return air hole 11 is opened in the circular area defined by the return air plate 10. The return air center line is the axis of the return air plate 10. The significance of the return air center line is that it defines that the hot air unit, the return air plate 10 and the back plate 60 are arranged in sequence along the extension direction of the return air center line. Optionally, the fan and the return air plate 10 are arranged along the extension direction of the return air center line. The rotation axis of the fan coincides with the return air center line, and the negative pressure area formed after the fan rotates is roughly coaxial with the return air center line.

[0050] Due to the suction effect of the negative pressure area generated by the fan on the hot air flow, the existing baking and cooking equipment cannot form a large-scale and uniform heat flow field. The hot air flow entering the inner tank cavity will quickly gather and approach the axis of the fan, so that the heat flow field in the inner tank cavity is approximately conical in shape, and the hot air flow also generates a velocity vector flowing in the vertical direction. Obviously, the heat flow field generated by the existing baking and cooking equipment not only cannot fully occupy the internal space of the inner tank cavity to fully surround the food, but also the velocity component of the hot air flow in the vertical direction will cause some foods to not come into contact with the hot air flow and be undercooked, while another part of the foods is likely to be burnt due to more frequent contact with the hot air flow.

[0051] In view of this, the hot air blower baffle of the present utility model further includes a deflector 40, which is used to guide and adjust the flow velocity direction of the hot air flow passing through the positive air outlet hole 21, passing through the air outlet plate 20 and blowing into the inner tank cavity, so as to form a uniform and larger-volume heat flow field in the inner tank cavity, thereby improving the uniformity of food ripening and making the ripening degree of each part of the food close. Specifically, the deflector 40 is arranged at the opening edge of the positive air outlet hole 21 and is inclined relative to the air outlet plate 20. The deflector 40 includes a starting end 41 and a leading end 42 arranged in sequence along the return air center line. Assuming a plane perpendicular to the return air center line gradually moves away from the door panel and gradually moves closer to the hot air blower baffle, and then gradually moves away from the hot air blower baffle and continues to move closer to the back plate 60, then this plane first cuts the leading end 42, and then cuts the starting end 41 after moving a certain distance. When the hot air flow passes through the positive air outlet hole 21 and blows into the inner tank cavity, the hot air flow first passes through the starting end 41 and then passes through the leading end 42. The changing trend of the distance from the deflector 40 to the return air center line is: from the starting end 41 to the leading end 42, the distance from the deflector 40 to the return air center line changes in an increasing trend. Thus, the hot air flow obtains a velocity vector that gradually moves away from the return air center line when passing through the positive air outlet hole 21 and blowing into the inner tank cavity.

[0052] Refer to Figure 3 , Figures 6 to 7 , in order to Figure 3 Take the rectangular hot air blower baffle shown as an example to introduce the positive significance of the deflector 40 in adjusting the flow velocity direction of the hot air flow. The rectangular outer contour of the hot air blower baffle is formed by the air outlet plate 20, that is, the air outlet plate 20 connected to the outer edge of the return air plate 10 has a rectangular outer contour shape. The outer edge of the air outlet plate 20 includes a first vertical side 203, a top side 204, a second vertical side 205 and a bottom side 206 arranged in sequence around the return air plate 10. The inner tank 50 of the baking cooking device is a hollow prismatic structure. The hot air blower baffle is arranged at one end of the inner tank 50, and the opening at the other end of the inner tank 50 is closed by the door panel of the baking cooking device. The inner tank 50 includes a first side wall 51, a top wall 52, a second side wall 53 and a bottom wall 54 surrounding the return air center line. The inner tank cavity is formed by enclosing the first side wall 51, the top wall 52, the second side wall 53, the bottom wall 54 and the hot air blower baffle. The first side wall 51 is adjacent and corresponding to the first vertical side 203, the top wall 52 is adjacent and corresponding to the top side 204, the second side wall 53 is adjacent and corresponding to the second vertical side 205, and the bottom wall 54 is adjacent and corresponding to the bottom side 206. Therefore, after the hot air flow obtaining a velocity vector away from the return air center line blows into the inner tank cavity, these hot air flows are guided by the deflector 40 and flow close to the first side wall 51, the top wall 52, the second side wall 53 and the bottom wall 54, which helps to overcome the suction effect of the fan negative pressure area, and the hot air flow will not be sucked by the negative pressure area prematurely and move closer to the return air center line.

[0053] The side of the first side wall 51 close to the inner container cavity, the side of the top wall 52 close to the inner container cavity, the side of the second side wall 53 close to the inner container cavity, and the side of the bottom wall 54 close to the inner container cavity are collectively referred to as the inner wall of the inner container 50. Optionally, the opening position of the positive air outlet 21 is configured to be close to any one or more of the first vertical side 203, the top side 204, the second vertical side 205, and the bottom side 206. That is, the opening position of the positive air outlet 21 aims to be far from the return air center line, and the farther away from the return air center line, the better. According to the wall attachment effect of the fluid (also known as the Coanda effect), when the hot air flow approaches and flows close to the first side wall 51, the top wall 52, the second side wall 53, and the bottom wall 54, the hot air flow may flow along the inner wall surface of the inner container 50 by virtue of the wall attachment effect. The hot air flow will further strengthen the resistance of the hot air flow to the suction force of the fan. The hot air flow can flow farther along the direction away from the hot air blower baffle until it is blocked by the door panel and then turns around and flows back, thereby expanding the spatial volume of the heat flow field. Not only that, the hot air flow forms an encircling heat flow field by virtue of the wall attachment effect. The characteristics of the encircling heat flow field are as follows: ① Occupy as much spatial volume of the inner container cavity as possible to fully surround the food ingredients; ② The spatial shape of the heat flow field is closer to the spatial shape of the inner container cavity; ③ The hot air flow basically flows horizontally along the inner wall surface of the inner container 50 before reaching the door panel, and the hot air flow has almost no or a very small velocity vector in the vertical direction.

[0054] The above characteristics ① and ② determine that the hot air blower baffle and the baking and cooking food ingredients of the present invention can bake and cook a larger volume of food ingredients until they are cooked. The food ingredients placed in the inner container cavity can be fully surrounded by the encircling heat flow field, avoiding the situation that some food ingredients cannot come into contact with the hot air flow and remain half-cooked; the above characteristic ③ determines that the flow rate of the hot air flow is uniform at different height positions in the inner container cavity, and the flow velocity of the hot air flow is uniform at different height positions in the inner container cavity, that is, the flow velocity of the hot air flow at different height positions is basically in the horizontal direction. Furthermore, the hot air blower baffle and the baking and cooking equipment of the present invention can improve the uniformity of cooking of the food ingredients, that is, the cooking degree of each part of the food ingredients tends to be uniform, and the cooking degree of the food ingredients will not be affected by the height position of the baking tray in the inner container cavity. That is, the baking and cooking equipment of the present invention allows the user to place the baking tray containing the food ingredients at any height position in the inner container cavity, and there will be no situation where some food ingredients are not fully heated and remain half-cooked or some food ingredients are overheated and charred.

[0055] Optionally, refer to Figures 4 to 5, in some embodiments, the air outlet plate 20 includes an air outlet front side 201 and an air outlet rear side 202 which are arranged back to back. The air outlet front side 201 faces the door panel and encloses an inner container cavity with the inner wall of the inner container 50. The air outlet rear side 202 is the side of the air outlet plate 20 relatively closer to the back plate 60 and the hot air unit. The guide vane 40 is bent relative to the air outlet plate 20 in an orientation away from the air outlet front side 201 and protrudes from the air outlet rear side 202. Preferably, the guide vane 40 does not protrude from the air outlet front side 201. With such a setting, the guide vane 40 will not intrude into the inner container cavity, which can prevent the food from contacting the guide vane 40 and being contaminated. When the user places a baking tray containing food into the inner container cavity and takes the baking tray out of the inner container cavity, it is safer, and the hand is not easily scratched by the guide vane 40.

[0056] Optionally, refer to Figure 2 , and refer to Figures 4 to 5 simultaneously. The bending crease between the guide vane 40 and the air outlet plate 20 is formed by the leading end 42. The leading end 42 is connected to the edge of the positive air outlet hole 21, and the contour shape of the guide vane 40 matches the opening shape of the positive air outlet hole 21. With such a setting, the guide vane 40 and the air outlet plate 20 can be processed by stamping the hot air blower baffle, and the obtained hot air blower baffle has higher strength and durability.

[0057] Specifically, as Figures 1 to 6 shown, the guide vane 40 is a polygonal sheet structure, the opening shape of the positive air outlet hole 21 is polygonal, and one side of the guide vane 40 forms the leading end 42 and is connected to one side of the opening of the positive air outlet hole 21. The contour of the guide vane 40 and the opening shape of the positive air outlet hole 21 can be quadrilateral, pentagon, etc.

[0058] Optionally, refer to Figures 2 to 5 . The opening edge of the positive air outlet hole 21 includes a connecting edge 2101 and an opening edge 2102. The connecting edge 2101 is connected to the leading end 42, the opening edge 2102 is not connected to the leading end 42, the shortest distance from the connecting edge 2101 to the return air center line is D1, the longest distance from the opening edge 2102 to the return air center line is D2, and D1 ≥ D2. Taking Figures 1 to 2 the hot air blower baffle shown as an example, the opening edge of the rectangular positive air outlet hole 21 includes a connecting edge 2101 connecting the leading end 42 and the remaining three opening edges 2102. An obtuse angle is formed between the guide vane 40 and the air outlet rear side 202. With such a setting, in the case where the hot air unit is equipped with a centrifugal fan, the hot air flow generated by the hot air unit first flows through the opening edge 2102 in a direction away from the axis of the centrifugal fan, then reaches the guide vane 40, and then obliquely passes through the air outlet plate 20 under the guiding action of the guide vane 40 to blow into the inner container cavity, and the guide vane 40 does not interfere with the hot air flow flowing towards the positive air outlet hole 21, and the hot air flow still has a large initial kinetic energy after entering the inner container cavity.

[0059] Refer to Figure 3 and Figures 6 to 7 In some embodiments, the hot air blower baffle is used in combination with two sets of hot air units to form a double hot air source baking and cooking device. The number of the return air plates 10 is two. The two return air plates 10 are respectively a first return air plate 101 and a second return air plate 102. The first return air plate 101 and the second return air plate 102 are arranged along the extension direction of the perpendicular bisector of the top edge 204. They are respectively constructed with a first return air center line and a second return air center line that are parallel to each other. The first return air plate 101 is the one of the two return air plates 10 that is relatively closer to the top edge 204, and the second return air plate 102 is the one of the two return air plates 10 that is relatively closer to the bottom edge 206. The two sets of hot air units are respectively a first hot air unit 71 and a second hot air unit 72. The first hot air unit 71 and the first return air plate 101 are arranged in sequence along the first return air center line. The fan of the first hot air unit 71 rotates around the first return air center line. The second hot air unit 72 and the second return air plate 102 are arranged in sequence along the second return air center line. The fan of the second hot air unit 72 rotates around the second return air center line. The direct air holes 21 opened in the air outlet plate 20 are all strip-shaped holes, including two vertical strip-shaped holes and two inclined strip-shaped holes. The guide vanes 40 include two vertical guide vanes 40 and two inclined guide vanes 40. The two vertical guide vanes 40 are respectively connected to the edges of the two vertical strip-shaped holes, and the two inclined guide vanes 40 are respectively connected to the edges of the two inclined strip-shaped holes.

[0060] Specifically, the first vertical side 203 and the second vertical side 205 are arranged side by side and back to back, and they are symmetric about the perpendicular bisector of the top side 204. The two vertical strip-shaped holes are the first vertical strip-shaped hole 213 and the second vertical strip-shaped hole 214 respectively, the two inclined strip-shaped holes are the first inclined strip-shaped hole 211 and the second inclined strip-shaped hole 212 respectively, the two vertical guide vanes 40 are the first vertical guide vane 403 and the second vertical guide vane 404 respectively, and the two inclined guide vanes 40 are the first inclined guide vane 401 and the second inclined guide vane 402 respectively. The first vertical strip-shaped hole 213 is parallel to the first vertical side 203 and is opened between the two return air plates 10 and the first vertical side 203. The second vertical strip-shaped hole 214 is parallel to the second vertical side 205 and is opened between the two return air plates 10 and the second vertical side 205. The first vertical strip-shaped hole 213 and the second vertical strip-shaped hole 214 are symmetrically arranged about the perpendicular bisector of the top side 204. The outlet end 42 of the first vertical guide vane 403 is connected to the side of the first vertical strip-shaped hole 213 that is relatively far from the second vertical side 205. The outlet end 42 of the second vertical guide vane 404 is connected to the side of the second vertical strip-shaped hole 214 that is relatively far from the first vertical side 203. The first inclined strip-shaped hole 211 is located between the first vertical side 203 and the top side 204 and extends along the extension direction of the chamfer between the first vertical side 203 and the top side 204. The second inclined strip-shaped hole 212 is located between the second vertical side 205 and the top side 204 and extends along the extension direction of the chamfer between the second vertical side 205 and the top side 204. The first inclined strip-shaped hole 211 and the second inclined strip-shaped hole 212 are symmetrically arranged about the perpendicular bisector of the top side 204. The outlet end 42 of the first inclined guide vane 401 is connected to the side of the first inclined strip-shaped hole 211 that is relatively far from the second vertical side 205 and the bottom side 206. The outlet end 42 of the second inclined guide vane 402 is connected to the side of the second inclined strip-shaped hole 212 that is relatively far from the first vertical side 203 and the bottom side 206. If the hot air blower baffle is observed in the direction facing the front side 201 of the air outlet, the first vertical side 203, the top side 204, the second vertical side 205 and the bottom side 206 are arranged around the two return air plates 10 in a clockwise direction in turn, and the first vertical strip-shaped hole 213, the first inclined strip-shaped hole 211, the second inclined strip-shaped hole 212 and the second vertical strip-shaped hole 214 are arranged around the two return air plates 10 in a clockwise direction in turn.

[0061] With such a setting, the hot air flow passing through the air outlet plate 20 from the first obliquely strip-shaped hole 211 and blowing into the inner cavity of the inner container obtains a velocity vector approaching the first side wall 51 and a velocity vector approaching the top wall 52 under the guidance of the first obliquely guiding piece 401. Therefore, the hot air flow passing through the first obliquely strip-shaped hole 211 will flow along the inner walls of the first side wall 51 and the top wall 52 based on the wall attachment effect; the hot air flow passing through the second obliquely strip-shaped hole 212 and blowing into the inner cavity of the inner container obtains a velocity vector approaching the second side wall 53 and a velocity vector approaching the top wall 52 under the guidance of the second obliquely guiding piece 402. Therefore, the hot air flow passing through the second obliquely strip-shaped hole 212 will flow along the inner walls of the second side wall 53 and the top wall 52 based on the wall attachment effect, which is beneficial to expanding the spatial range of the surrounding heat flow field so that the surrounding heat flow field can encompass a larger volume of food ingredients;

[0062] Moreover, the hot air flow passing through the air outlet plate 20 from the first vertically strip-shaped hole 213 and blowing into the inner cavity of the inner container obtains a velocity vector approaching the first side wall 51 under the guidance of the first vertically guiding piece 403. Therefore, the hot air flow passing through the first vertically strip-shaped hole 213 will flow along the inner wall of the first side wall 51 based on the wall attachment effect. The hot air flow passing through the air outlet plate 20 from the second vertically strip-shaped hole 214 and blowing into the inner cavity of the inner container obtains a velocity vector approaching the second side wall 53 under the guidance of the second vertically guiding piece 404. Therefore, the hot air flow passing through the second vertically strip-shaped hole 214 will flow along the inner wall of the second side wall 53 based on the wall attachment effect, which is beneficial to expanding the width range of the surrounding heat flow field so that the surrounding heat flow field can encompass a larger volume of food ingredients in the horizontal direction;

[0063] In addition, the hot air blower baffle is suitable for being paired with a fan that can rotate forward and backward. That is, the first hot air unit 71 located behind the first air return plate 101 includes a first fan, and the first fan can rotate around the first air return center line with a rotation direction that alternates between clockwise and counterclockwise. The second hot air unit 72 located behind the second air return plate 102 includes a second fan, and the second fan can rotate around the second air return center line with a rotation direction that alternates between clockwise and counterclockwise to improve the uniformity of cooking of food ingredients in the horizontal direction.

[0064] Further, refer to Figure 3 and Figure 6, the first diagonal strip-shaped hole 211 and the second diagonal strip-shaped hole 212 are located in the height range of the first air return plate 101, that is, the connection line between the end of the first diagonal strip-shaped hole 211 far from the bottom edge 206 and the end of the second diagonal strip-shaped hole 212 far from the bottom edge 206 intersects or is at least tangent to the first air return plate 101, and the connection line between the end of the first diagonal strip-shaped hole 211 close to the bottom edge 206 and the end of the second diagonal strip-shaped hole 212 close to the bottom edge 206 intersects or is at least tangent to the first air return plate 101. The first vertical strip-shaped hole 213 and the second vertical strip-shaped hole 214 are located in the height range of the second air return plate 102, that is, the connection line between the end of the first vertical strip-shaped hole 213 far from the bottom edge 206 and the end of the second vertical strip-shaped hole 214 far from the bottom edge 206 intersects or is at least tangent to the second air return plate 102, and the connection line between the end of the first vertical strip-shaped hole 213 close to the bottom edge 206 and the end of the second vertical strip-shaped hole 214 close to the bottom edge 206 intersects or is at least tangent to the second air return plate 102.

[0065] Specifically, in some embodiments, as Figure 6 shown, the baking and cooking device includes a first shelf 81, a second shelf 82, a third shelf 83, a fourth shelf 84, and a fifth shelf 85 disposed in the inner cavity of the inner container. The first shelf 81, the second shelf 82, the third shelf 83, the fourth shelf 84, and the fifth shelf 85 are arranged in sequence along the vertically downward direction. The baking and cooking device further includes a first baking tray 91 and a second baking tray 92. The baking and cooking device of this embodiment can achieve single-layer food baking and double-layer food baking. When baking single-layer food, one of the first baking tray 91 or the second baking tray 92 can be placed on any one of the first shelf 81, the second shelf 82, the third shelf 83, the fourth shelf 84, and the fifth shelf 85, that is, when baking single-layer food, the height position of the food in the inner cavity of the inner container is not limited. When baking double-layer food, one of the first baking tray 91 and the second baking tray 92 is placed on the second shelf 82, and the other is placed on the fifth shelf 85. The distance from the top wall 52 to the baking tray placed on the second shelf 82 is approximately equal to the distance between the two baking trays, so as to ensure that the heights of the foods respectively carried by the two baking trays are approximately equal. When baking double-layer food, the hot air flow blown out from the first diagonal strip-shaped hole 211 and the second diagonal strip-shaped hole 212 is responsible for heating the food in the baking tray placed on the second shelf 82, and the hot air flow blown out from the first vertical strip-shaped hole 213 and the second vertical strip-shaped hole 214 is responsible for heating the food in the baking tray placed on the fifth shelf 85. The baking tray placed on the second shelf 82 is located in the height range of the first air return plate 101, and the baking tray placed on the fifth shelf 85 is located in the height range of the second air return plate 102.

[0066] Further, for the diagonal strip-shaped holes and the vertical strip-shaped holes, the opening shape of any one of the positive air outlet holes 21 is a quadrilateral, and the quadrilateral edge includes a longer long side and a shorter short side. The leading end 42 of the first diagonal guide vane 401 is connected to the long side of the first diagonal strip-shaped hole 211, the leading end 42 of the second diagonal guide vane 402 is connected to the long side of the second diagonal strip-shaped hole 212, the leading end 42 of the first vertical guide vane 403 is connected to the long side of the first vertical strip-shaped hole 213, and the leading end 42 of the second vertical guide vane 404 is connected to the long side of the second vertical strip-shaped hole 214. Moreover, the leading end 42 of each guide vane 40 is connected to the longer one of the long sides of the corresponding positive air outlet hole 21 that is farther from the return air plate 10.

[0067] With such a setting, the proportion of the hot air flow that can be guided by the guide vane 40 and have its speed direction changed is increased, so that more hot air flows blown from the positive air outlet holes 21 into the inner tank cavity are guided by the guide vane 40, thereby enabling more hot air flows to flow along the inner wall surface of the inner tank cavity, and further reducing the momentum of the hot air flow in the vertical direction.

[0068] Refer to Figure 1 、 Figures 3 to 5 In some embodiments, the baffle body further includes a side enclosure plate 30 provided with side air outlet holes 31. The side air outlet holes 31 communicate with the inner tank cavity. The side enclosure plate 30 is connected to the outer peripheral edge of the air outlet plate 20 and protrudes from the air outlet rear side 202 of the air outlet plate 20. The edge of the side enclosure plate 30 relatively far from the air outlet plate 20 is connected to the back plate 60. Thus, a gap for arranging the hot air unit is formed between the back plate 60 and the air outlet rear side 202, and this gap communicates with the side air outlet holes 31, the positive air outlet holes 21, and the return air holes 11. When the hot air unit starts to operate, a part of the hot air flow generated by the fan is blown from the positive air outlet holes 21 into the inner tank cavity, and another part is blown from the side air outlet holes 31 into the inner tank cavity.

[0069] Optionally, the side enclosure plate 30 and the air outlet plate 20 are bent and connected. The number of the positive air outlet holes 21 and the number of the side air outlet holes 31 are both multiple, such as Figure 1 and Figure 3As shown, a plurality of positive air outlets 21 and a plurality of side air outlets 31 are alternately arranged around the air return plate 10. The first vertical strip-shaped hole 213, the side air outlet 31 adjacent to the first vertical edge 203, the first inclined strip-shaped hole 211, the side air outlet 31 adjacent to the top edge 204, the second inclined strip-shaped hole 212, the side air outlet 31 adjacent to the second vertical edge 205, the second vertical strip-shaped hole 214, and the side air outlet 31 adjacent to the bottom edge 206 are alternately arranged around the air return plate 10 in a clockwise direction. With this arrangement, after the hot air unit is started, the hot air flow blown from the side air outlet 31 into the inner cavity of the inner container can serve as a supplementary hot air flow, ensuring that there is a sufficient amount of hot air flow to heat the food materials. Moreover, the hot air flow blown from the side air outlet 31 is not easily blocked or interfered with by the guide vane 40, and the heat flow field formed by the hot air flow blown from the side air outlet 31 and the heat flow field formed by the hot air flow blown from the positive air outlet 21 are not easily interfered with each other.

[0070] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0071] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as appropriate changes and variations are made to the above embodiments within the scope of the substantial spirit of the present invention, they fall within the scope of protection required by the present invention.

Claims

1. A hot air blower baffle, characterized in that: The invention comprises a baffle body and a guide plate (40), wherein the baffle body comprises a return air plate (10) and an air outlet plate (20) respectively provided with a return air hole (11) and a positive air outlet hole (21), wherein the return air plate (10) is constructed with a return air center line for the return air plate (10) and the hot air unit to be arranged in sequence along the return air center line, wherein the guide plate (40) is arranged at the edge of the positive air outlet hole (21) and is inclined relative to the air outlet plate (20), wherein the guide plate (40) comprises a starting end (41) and an outlet end (42) which are arranged in sequence along the return air center line, and the distance between the guide plate (40) and the return air center line has a changing trend of increasing from the starting end (41) to the outlet end (42).

2. The hot air blower baffle according to claim 1, characterized in that: The air outlet plate (20) comprises an air outlet front side (201) and an air outlet rear side (202) arranged in opposite directions, and the guide plate (40) is bent relative to the air outlet plate (20) in an orientation away from the air outlet front side (201) and protrudes from the air outlet rear side (202).

3. The hot air blower baffle according to claim 2, characterized in that: The outlet end (42) is connected to the edge of the positive air outlet hole (21), and the guide plate (40) matches the opening of the positive air outlet hole (21).

4. The hot air blower baffle according to claim 3, characterized in that: The opening edge of the positive air outlet (21) comprises a connecting edge (2101) and an opening edge (2102), the connecting edge (2101) is connected to the outlet end (42), the shortest distance from the connecting edge (2101) to the return air centerline is D1, the longest distance from the opening edge (2102) to the return air centerline is D2, and D1≥D2.

5. The hot air blower baffle according to claim 3, characterized in that: The guide plate (40) is a polygonal sheet structure, the opening shape of the positive air outlet (21) is a polygon, and one side of the guide plate (40) forms the outlet end (42) and is connected to one side of the opening of the positive air outlet (21).

6. The hot air blower baffle according to claim 1, characterized in that: The air outlet plate (20) comprises a first vertical side (203), a top side (204) and a second vertical side (205) which are sequentially arranged around the air return plate (10); the positive air outlet hole (21) comprises an oblique strip hole; the guide plate (40) comprises an oblique guide plate (40); the oblique guide plate (40) is connected to the long side of the oblique strip hole, wherein: At least one of the oblique strip holes is located between the first vertical side (203) and the top side (204), and extends in the extension direction of the chamfer between the first vertical side (203) and the top side (204); and / or, At least one of the oblique strip-shaped holes is located between the second vertical side (205) and the top side (204), and extends in the extension direction of the chamfer between the second vertical side (205) and the top side (204).

7. The hot air blower baffle according to claim 1, characterized in that: The air outlet plate (20) comprises a first vertical side (203) and a second vertical side (205) arranged side by side and opposite to each other, the air return plate (10) is located between the first vertical side (203) and the second vertical side (205), the positive air outlet hole (21) comprises a vertical strip hole, the guide plate (40) comprises a vertical guide plate (40), and the vertical guide plate (40) is connected to the long side of the vertical strip hole, wherein: At least one of the vertical strip holes is parallel to the first vertical side (203) and is opened between the return air plate (10) and the first vertical side (203); and / or, At least one of the vertical strip holes is parallel to the second vertical side (205), and is opened between the return air plate (10) and the second vertical side (205).

8. The hot air blower baffle according to claim 6 or 7, characterized in that: The air outlet plate (20) comprises a first vertical side (203), a top side (204) and a second vertical side (205) which are sequentially arranged around the air return plate (10); the air return plate (10) is located between the first vertical side (203) and the second vertical side (205); the positive air outlet hole (21) comprises a first oblique strip hole (211), a second oblique strip hole (212), a first vertical strip hole (213) and a second vertical strip hole (214); wherein: The first oblique strip-shaped hole (211) is opened between the first vertical side (203) and the top side (204), and extends in the extension direction of the chamfer between the first vertical side (203) and the top side (204); The second oblique strip-shaped hole (212) is opened between the second vertical side (205) and the top side (204), and extends in the extension direction of the chamfer between the second vertical side (205) and the top side (204); The first vertical strip hole (213) is parallel to the first vertical side (203), and is opened between the return air plate (10) and the first vertical side (203); The second vertical strip hole (214) is parallel to the second vertical side (205), and is opened between the return air plate (10) and the second vertical side (205); The first vertical side (203) and the second vertical side (205) are symmetrical about the perpendicular midline of the top side (204), the first oblique strip hole (211) and the second oblique strip hole (212) are symmetrical about the perpendicular midline of the top side (204), and the first vertical strip hole (213) and the second vertical strip hole (214) are symmetrical about the perpendicular midline of the top side (204).

9. The hot air blower baffle according to claim 8, characterized in that: The return air plate (10) comprises a first return air plate (10) and a second return air plate (10) arranged in the extension direction of the perpendicular midline of the top edge (204); the first oblique strip hole (211) and the second oblique strip hole (212) are located in the height range of the first return air plate (10); and the first vertical strip hole (213) and the second vertical strip hole (214) are located in the height range of the second return air plate (10).

10. The hot air blower baffle according to claim 8, characterized in that: The guide plate (40) comprises a first oblique guide plate (401), a second oblique guide plate (402), a first vertical guide plate (403) and a second vertical guide plate (404); the first oblique guide plate (401) is connected to the long side of the first oblique strip hole (211); the second oblique guide plate (402) is connected to the long side of the second oblique strip hole (212); the first vertical guide plate (403) is connected to the long side of the first vertical strip hole (213); and the second vertical guide plate (404) is connected to the long side of the second vertical strip hole (214).

11. The hot air blower baffle according to any one of claims 1 to 7, 9 to 10, characterized in that: The air outlet plate (20) is connected to the outer peripheral edge of the return air plate (10), and the baffle body also includes a side panel (30) provided with a side air outlet hole (31), the side panel (30) is connected to the outer peripheral edge of the air outlet plate (20) and protrudes from the air outlet plate (20), and the front air outlet hole (21) and the side air outlet hole (31) are alternately arranged around the return air plate (10).

12. A baking cooking device, characterized in that: It comprises a hot air blower baffle as described in any one of claims 1 to 11.

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