Steaming oven with uniformly heated inner cavity

Abstract

The utility model relates to the technical field of cooking electric appliances, in particular to a steaming oven with an inner cavity heated evenly, which comprises an oven body, a centrifugal fan, a motor, a first heating tube, a partition plate and a reflecting cover. The first heating pipe and the centrifugal fan are arranged between the partition plate and the reflecting cover, the first heating pipe is arranged on the periphery of the centrifugal fan, the centrifugal fan is connected to an output shaft of the motor, and the reflecting cover is provided with a reflecting boss capable of gathering hot air towards the inner side of the box body. According to the utility model, the reflecting boss is designed on the reflecting cover, so that a wind field is gathered, the forward wind speed is increased, hot air is prevented from being trapped in the rear cavity between the partition plate and the reflecting cover, the wind speed of the hot air towards the interior of the box body is increased, the hot air distribution uniformity is improved, and the utilization efficiency of the first heating tube is improved, thereby generating positive influence on the cooking efficiency and the cooking effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cooking electric appliances, more particularly to a steam oven with uniform heating of the inner cavity. BACKGROUND

[0002] Ovens, steam ovens, deep-frying ovens and other cooking appliances with the function of hot air circulation heating food are favored by consumers due to their rich functions and convenient operation. With the continuous improvement of people's living quality, the temperature uniformity of the inner cavity of the cooking appliance directly affects the taste of food, and consumers have gradually put forward higher and higher requirements for the temperature uniformity of the inner cavity of the cooking appliance; the wind speed of the hot air in the cooking appliance box also directly affects the cooking efficiency and cooking effect, and consumers have higher and higher requirements for the wind speed of the inner cavity of the cooking appliance. At present, such cooking appliances, such as steam ovens, use fans to blow the hot air generated by the first heating pipe into the box for cooking. The hot air undergoes many turns during the flow process, the wind field is chaotic, and the wind loss is large. More prominently, a large amount of hot air is trapped in the cavity between the baffle and the reflector, which cannot be effectively utilized, affecting the wind speed and the uniformity of hot air distribution, thereby adversely affecting the cooking efficiency and cooking effect. SUMMARY

[0003] The utility model aims at overcoming the deficiency that a large amount of hot air is trapped in the cavity between the baffle and the reflector in the prior art and cannot be effectively utilized, and provides a steam oven with uniform heating of the inner cavity, which increases the wind speed of the hot air into the box and improves the uniformity of hot air distribution.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of:

[0005] Provided is a steam oven with uniform heating of the inner cavity, which comprises a box, a centrifugal fan, a motor, a first heating pipe, a baffle and a reflector. The baffle and the reflector are both installed on the back of the box. The first heating pipe and the centrifugal fan are arranged between the baffle and the reflector, and the first heating pipe is arranged on the outer periphery of the centrifugal fan. The centrifugal fan is connected to the output shaft of the motor. The reflector is provided with a reflection boss that can gather hot air to the inside of the box.

[0006] The steam oven with uniform heating of the inner cavity of the utility model has the following advantages. The first heating pipe generates heat when powered on, heating the surrounding air. The motor drives the centrifugal fan to work, and the centrifugal fan rotates to blow hot air into the box through the baffle, heating the food in the box. The utility model is provided with a reflection boss on the reflector, which helps to gather the wind field, increase the forward wind speed, avoid the trapping of hot air in the rear cavity between the baffle and the reflector, increase the wind speed of the hot air into the box and improve the uniformity of hot air distribution, thereby improving the utilization efficiency of the first heating pipe and positively affecting the cooking efficiency and cooking effect.

[0007] Further, the reflection boss is surrounded by a slope structure which expands from the outside to the inside of the box, and the fan is at least partially located in the reflection boss. The slope structure has the effects of gathering and pushing, and has a simple structure. The fan is partially located in the reflection boss, i.e. the fan is moved backward relative to the existing structure of the steam oven, so that the wind pressure in front of the fan is increased, and the wind speed in front of the hot air is increased.

[0008] Further, the reflection boss is a circular boss. The circular boss has a low processing difficulty and a good effect of gathering and pushing the hot air to move forward, relative to a special-shaped boss.

[0009] Further, the baffle includes a return air area in the middle region and a supply air area around the return air area. The position of the centrifugal fan corresponds to the position of the return air area. When the centrifugal fan rotates, the hot air flows from the supply air area to the box, and the hot air in the box flows back to the rear cavity from the return air area, so as to form the circulation of the air.

[0010] Further, the return air area includes a first return air area, a second return air area and a third return air area which are concentrically arranged from inside to outside. The first return air area and the second return air area are located in the projection plane of the baffle formed by the rotation of the centrifugal fan, and the third return air area is located outside the projection plane of the baffle formed by the rotation of the centrifugal fan. The first return air area, the second return air area and the third return air area are arranged to increase the porosity and the return air area of the return air area, and to reduce the difference between the wind speed in the middle region of the box and the wind speed around the box, so as to improve the uniformity of the temperature distribution in the box.

[0011] Further, a plurality of first return air holes are uniformly distributed in the first return air area, and the first return air holes are circular holes; a plurality of groups of second return air holes are uniformly distributed in the second return air area, and the second return air holes are circular ring holes; a plurality of groups of third return air holes are uniformly distributed in the third return air area, and the third return air holes are circular ring holes. The circular ring hole has a larger porosity than the circular hole, and the circular ring hole is closer to the fluid rotation mode, so that the wind resistance is smaller and the efficiency is higher.

[0012] Further, the second return air holes and the third return air holes are distributed on a plurality of circumferences, and the second return air holes and the third return air holes are centrally symmetrically distributed, and the arc length of the second return air holes and the third return air holes gradually increases from inside to outside. The centrifugal fan throws out the hot air from the circumference by centrifugal effect, the hot air in the rear cavity surrounded by the reflection cover and the baffle is trapped around the rear cavity, and the first return air area, the second return air area and the third return air area gradually increase the porosity from inside to outside, so as to accelerate the flow of the hot air around the rear cavity and slow down the phenomenon of the hot air trapped around the rear cavity.

[0013] Further, the first heating pipe is arranged in a U shape and comprises a low-temperature zone, a first heating zone and a second heating zone connected in sequence, the air supply zone comprises a first air supply zone, a second air supply zone, a third air supply zone and a fourth air supply zone distributed around the baffle in sequence, and the first air supply zone, the second air supply zone and the third air supply zone correspond to the low-temperature zone, the first heating zone and the second heating zone in position respectively. The closer to the position of the heating pipe, the higher the temperature, and the positions of the air supply zone and the heating zone correspond to each other, so that the heat generated by the first heating pipe can flow fully into the box body, and the utilization efficiency of the first heating pipe is improved.

[0014] Further, the first air supply zone, the second air supply zone, the third air supply zone and the fourth air supply zone comprise a plurality of first air supply holes, second air supply holes, third air supply holes and fourth air supply holes distributed uniformly respectively, the number of the first air supply holes is less than that of the third air supply holes, and the number of the fourth air supply holes is less than that of the second air supply holes. The temperature of the low-temperature zone is lower than that of the first heating zone and the second heating zone, the position of the fourth air supply zone is not heated, and the temperature of this region is also lower than that of the first heating zone and the second heating zone. The porosity of the region with high temperature is relatively large, and the porosity of the region with low temperature tends to be low, so that the overall temperature distribution uniformity can be effectively improved.

[0015] Further, the baffle comprises a first plate zone, a second plate zone and a third plate zone arranged in sequence from left to right, the first plate zone and the third plate zone are symmetrically arranged about the second plate zone and extend into the box body, and the included angle between the first plate zone and the second plate zone and the included angle between the third plate zone and the second plate zone are obtuse angles. The baffle with the folded surface has the effects of gathering and pushing the hot air, so that the distribution of the hot air flow field in the box body is improved.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The steam oven with the uniform heating of the inner cavity of the utility model improves the utilization efficiency of the first heating pipe, improves the uniformity of the hot air distribution in the box body, and has a positive influence on the cooking efficiency and the cooking effect.

[0018] The steam oven with the uniform heating of the inner cavity of the utility model improves the utilization efficiency of the first heating pipe, improves the uniformity of the hot air distribution in the box body, and has a positive influence on the cooking efficiency and the cooking effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the steam oven with the uniform heating of the inner cavity.

[0020] Figure 2 Structure diagram of another perspective view of the steam oven with uniform heating of the inner cavity;

[0021] Figure 3 Structure diagram of a reflector of the steam oven with uniform heating of the inner cavity;

[0022] Figure 4 Structure diagram of another reflector of the steam oven with uniform heating of the inner cavity;

[0023] Figure 5 Structure diagram of a baffle of the steam oven with uniform heating of the inner cavity;

[0024] Figure 6 Structure diagram of another baffle of the steam oven with uniform heating of the inner cavity;

[0025] Figure 7 Flow field simulation effect diagram of the rear perspective view of the steam oven in the comparative example;

[0026] Figure 8 Flow field simulation effect diagram of the front perspective view of the steam oven in the comparative example;

[0027] Figure 9 Flow field simulation effect diagram of the rear perspective view of the steam oven in the second embodiment;

[0028] Figure 10 Flow field simulation effect diagram of the front perspective view of the steam oven in the second embodiment;

[0029] Figure 11 Flow field simulation effect diagram of the rear perspective view of the steam oven in the third embodiment;

[0030] Figure 12 Flow field simulation effect diagram of the front perspective view of the steam oven in the third embodiment;

[0031] In the drawings: 100, oven body; 200, centrifugal fan; 400, first heating tube; 410, low temperature area; 420, first heating area; 430, second heating area; 500, baffle; 510, first return air area; 511, first return air hole; 520, second return air area; 521, second return air hole; 530, third return air area; 531, third return air hole; 540, first air supply area; 541, first air supply hole; 550, second air supply area; 551, second air supply hole; 560, third air supply area; 561, third air supply hole; 570, fourth air supply area; 571, fourth air supply hole; 581, first plate area; 582, second plate area; 583, third plate area; 600, reflector; 610, reflection boss. DETAILED DESCRIPTION

[0032] The utility model makes further explanation in combination with specific implementation. Among them, the drawing is only for example explanation, and the representation is only schematic diagram, and can not be understood as the limitation to this patent; in order to better illustrate the embodiment of the utility model, some components of the drawing can be omitted, enlarged or reduced, and it does not represent the size of actual product; for those skilled in the art, it is understandable that some well-known structures and their description in the drawing can be omitted.

[0033] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawing, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawing are only for example illustration, and can not be understood as the limitation to this patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0034] Embodiment one

[0035] The embodiment is the first embodiment of the cavity even heating steaming oven of the utility model, including box 100, centrifugal fan 200, motor, first heating tube 400, baffle 500 and reflector 600, the baffle 500 and the reflector 600 are all installed on the back of the box 100, the first heating tube 400 and the centrifugal fan 200 are arranged between the baffle 500 and the reflector 600, the first heating tube 400 is arranged on the outer periphery of the centrifugal fan 200, the centrifugal fan 200 is connected to the output shaft of the motor, the reflector 600 is provided with the reflection boss 610 that can gather hot air to the inside of the box 100, as shown in Figure 1 、 Figure 2 The embodiment is provided with the second heating tube on the top of the box 100 in addition to the first heating tube 400, to realize rapid heating and improve heating efficiency.

[0036] The four peripheries of the reflection boss 610 are the inclined surface structure that expands from the outside of the box 100 to the inside of the box 100, and the fan is at least partially located in the reflection boss 610.Utilize the gathering effect and the pushing action of the inclined surface structure, and its structure is simple; the fan is partially located in the reflection boss 610, that is, compared with the existing structure of the steaming oven, the fan is moved back, increases the air pressure in front of the wind, and helps to increase the wind speed of the hot air in front.In the embodiment, the reflection boss 610 can be a circular boss, and also can be a special-shaped boss.

[0037] When the reflection boss 610 is a circular boss, a circular boss is additionally arranged on the basis of the existing reflection cover 600, the top surface area of the circular boss is smaller than the bottom surface area of the circular boss, as shown in Figure 3 It can be obtained by punching forming, or can be obtained by other forming methods. Compared with the special-shaped boss, the circular boss has low processing difficulty and good effects of gathering hot air and pushing hot air forward.

[0038] When the reflection boss 610 is a special-shaped boss, only the shape of the existing reflection cover 600 needs to be changed on the basis of the existing reflection cover 600, the shapes of the bottom surface and the top surface are similar, both adopt a quadrilateral with smooth corner transition, the bottom surface area is larger than the top surface area, and the side surface between the bottom surface and the top surface is an arc surface with smooth transition, as shown in Figure 4 Compared with the circular boss, the special-shaped boss has smaller structural shape change relative to the existing reflection cover 600, and is easier to realize.

[0039] The specific working process of the steam oven with uniform inner cavity heating of the embodiment is as follows:

[0040] The first heating pipe 400 is powered to heat the surrounding air, the motor drives the centrifugal fan 200 to work, and the centrifugal fan 200 rotates to blow hot air into the box body 100 through the partition plate 500 to heat the food in the box body 100. The reflection boss 610 is arranged on the reflection cover 600 of the embodiment, which helps to gather the wind field, increase the forward wind speed, avoid the hot air being trapped in the rear cavity between the partition plate 500 and the reflection cover 600, increase the wind speed of the hot air into the box body 100, and improve the uniformity of the hot air distribution, improve the utilization efficiency of the first heating pipe 400, and thus positively affect the cooking efficiency and cooking effect.

[0041] Embodiment two

[0042] The second embodiment of the steam oven with uniform inner cavity heating of the utility model is similar to the first embodiment, and the difference lies in that the partition plate 500 includes a return air area in the middle region and a supply air area around the return air area. The position of the centrifugal fan 200 corresponds to the position of the return air area, and the return air area is a circular area, and the center of the circular area is located on the axis of the centrifugal fan 200; when the centrifugal fan 200 rotates, the hot air flows from the supply air area to the box body 100, the hot air in the box body 100 flows back to the rear cavity between the heat insulation plate and the reflection cover 600 through the return air area, and the hot air flows out from the four sides and returns from the center, thereby forming the circulation of the air.

[0043] The return air area includes a first return air area 510, a second return air area 520 and a third return air area 530 arranged concentrically from inside to outside. The first return air area 510 and the second return air area 520 are located in the projection plane of the baffle 500 formed by the rotation of the centrifugal fan. The third return air area 530 is located outside the projection plane of the baffle 500 formed by the rotation of the centrifugal fan. The first return air area 510, the second return air area 520 and the third return air area 530 are arranged to increase the porosity and the return air area of the return air area, reduce the difference between the wind speed in the middle area of the cabinet 100 and the wind speed in the surrounding area of the cabinet 100, and thus improve the uniformity of the temperature distribution in the cabinet 100.

[0044] In the embodiment, a plurality of first return air holes 511 are uniformly distributed in the first return air area 510, and the first return air holes 511 are circular holes. A plurality of groups of second return air holes 521 are uniformly distributed in the second return air area 520, and the second return air holes 521 are circular ring holes. A plurality of groups of third return air holes 531 are uniformly distributed in the third return air area 530, and the third return air holes 531 are circular ring holes, as shown in FIG. 5. Figure 5 The circular ring hole has a larger porosity than the circular hole, and the circular ring hole is closer to the fluid rotation mode, has smaller wind resistance and higher efficiency. Since the first return air area 510 is a circular area with a small radius and has the largest suction, the circular hole is relatively simple to process. In the second return air area 520 and the third return air area 530, there is a larger processing area, and more processing margins are reserved. The suction of the second return air area 520 and the third return air area 530 is smaller than that of the first return air area 510. By changing the porosity of different areas, the uniform distribution of the hot air flow field can be facilitated.

[0045] Specifically, the second return air holes 521 and the third return air holes 531 are distributed on a plurality of circumferences, and the second return air holes 521 and the third return air holes 531 are centrally symmetrically distributed. The arc length of the second return air holes 521 and the third return air holes 531 gradually increases from inside to outside. The arc length of the second return air holes 521 and the third return air holes 531 refers to the arc length between the end points of the circumference where the return air hole is located. The centrifugal fan 200 throws out the hot air from the circumference by centrifugal effect. The hot air in the rear cavity surrounded by the reflector 600 and the baffle 500 is trapped in the circumference of the rear cavity. The porosity of the first return air area 510, the second return air area 520 and the third return air area 530 gradually increases from inside to outside, which can accelerate the flow of hot air in the circumference of the rear cavity and slow down the phenomenon of hot air trapped in the circumference of the rear cavity.

[0046] In addition, the structure of the partition plate 500 is improved in the embodiment, and the structure of the partition plate 500 is adapted to the arrangement of the first heating pipe 400. The rule that should be met in the design is that the higher the temperature of the area of the first heating pipe 400, the greater the porosity of the corresponding area of the partition plate 500, so as to improve the utilization efficiency of the first heating pipe 400.

[0047] Specifically, in the embodiment, the first heating pipe 400 is arranged in a U shape and includes a low-temperature area 410, a first heating area 420, and a second heating area 430 connected in sequence. The air supply area includes a first air supply area 540, a second air supply area 550, a third air supply area 560, and a fourth air supply area 570 distributed around the partition plate 500 in sequence, respectively. The first air supply area 540, the second air supply area 550, and the third air supply area 560 correspond to the low-temperature area 410, the first heating area 420, and the second heating area 430, respectively. The closer to the position of the heating pipe, the higher the temperature. The position of the air supply area corresponds to the position of the heating area, which facilitates the full flow of the heat generated by the first heating pipe 400 to the cabinet 100, and improves the utilization efficiency of the first heating pipe 400.

[0048] The first air supply area 540, the second air supply area 550, the third air supply area 560, and the fourth air supply area 570 each include a plurality of uniformly distributed first air supply holes 541, second air supply holes 551, third air supply holes 561, and fourth air supply holes 571. The number of the first air supply holes 541 is less than the number of the second air supply holes 551 and the third air supply holes 561. The number of the fourth air supply holes 571 is less than the number of the second air supply holes 551, as shown in Figure 5 The temperature of the low-temperature area 410 is lower than the temperature of the first heating area 420 and the second heating area 430. The position of the fourth air supply area 570 is not heated, and the temperature of this area is also lower than the temperature of the first heating area 420 and the second heating area 430. The porosity of the area with high temperature is greater, and the porosity of the area with low temperature tends to be lower, thereby effectively improving the uniformity of the overall temperature distribution.

[0049] In addition, the rear cavity surrounded by the partition plate 500 and the reflector 600 in the embodiment is in the shape of a cuboid. Wind is easily trapped at the corners of the rear cavity. In the embodiment, the number, density, or area of the air supply holes at the corners is increased to increase the porosity of the corner area, thereby avoiding the formation of trapped wind in the rear cavity and helping to improve the uniformity of the distribution of the hot air flow field in the cabinet 100.

[0050] When the reflector 600 in the embodiment adopts the circular boss reflector 600 described in Embodiment One, the steam oven is subjected to flow field analysis, fluid analysis from the rear view angle, and fluid analysis from the front view angle, as shown in Figure 9 、 10 Figure 9 、 10 ​It can be seen that a low-speed zone (vortex shown in the figure) is formed in the middle region of the box 100, and the hot air flow field is relatively smooth, and the wind speed performance and uniformity of the steam oven of the embodiment are significantly improved compared with the comparative example. Specifically, according to the flow field analysis, the average wind speed in the cross section of the box 100 of the comparative example is 1.03 m / s, the average wind speed in the longitudinal section is 1.229 m / s, the maximum wind speed in the cross section is 5.848 m / s, and the maximum wind speed in the longitudinal section is 6.897 m / s. Among them, the average wind speed can be used to represent the wind speed performance, and the maximum wind speed can be used to represent the uniformity. Compared with the comparative example, the wind speed performance of the embodiment can be improved by 129.4% / 134.1%, and the uniformity can be improved by 172.3% / 193.2%.

[0051] The specific working principle of the embodiment is similar to that of example one, and the difference is as follows:

[0052] When the centrifugal fan 200 rotates, the hot air flows from the air supply area to the box 100, and the hot air in the box 100 flows back to the rear cavity between the heat insulation plate and the reflector 600, and the hot air flows out from the four sides and back from the center, thereby forming a circulation of the air. Through the position and shape design of the first return air hole 511, the second return air hole 521 and the third return air hole 531 on the first return air area 510, the second return air area 520 and the third return air area 530, the first return air hole 511 in the central region is a circular hole, the second return air hole 521 and the third return air hole 531 are circular ring holes, and the porosity of the first return air area 510, the second return air area 520 and the third return air area 530 gradually increases from inside to outside, which can accelerate the flow of hot air around the rear cavity and reduce the phenomenon of hot air being trapped around the rear cavity; according to the design of the position and shape of the first heating tube 400, the first air supply area 540, the second air supply area 550, the third air supply area 560 and the fourth air supply area 570, the temperature of the low-temperature area 410 is lower than that of the first heating area 420 and the second heating area 430, and the position of the fourth air supply area 570 is not heated. The temperature of this area is also lower than that of the first heating area 420 and the second heating area 430, and the porosity of the area with high temperature is larger, and the porosity of the area with low temperature tends to be lower, thereby effectively improving the temperature distribution uniformity of the whole.

[0053] Example three

[0054] The third embodiment of the utility model discloses the inner cavity even heating's steaming oven, this embodiment is similar with example one or example two, the difference lies in, in this embodiment, the baffle 500 includes first board area 581, second board area 582 and third board area 583 arranged in order from left to right, first board area 581 and third board area 583 about the second board area 582 symmetrical arrangement and all extend to the box 100, the included angle between first board area 581, second board area 582 and the included angle between third board area 583, second board area 582 are all obtuse angle, as shown in Figure 6 .

[0055] When the reflector 600 in this embodiment adopts the special-shaped reflector 600 in example one, the flow field analysis, the fluid analysis of rear view angle and the fluid analysis of front view angle of the steaming oven are as shown in Figure 11 、 12 . As shown in Figure 11 、 12 , a low-speed area (the vortex shown in the figure) is formed in the middle region in the box 100, and the hot air flow field is relatively more smooth than the comparative example, and the wind speed performance and uniformity of the steaming oven of the embodiment are significantly improved compared with the comparative example. Specifically, from the flow field analysis, the average wind speed in the cross section in the box 100 of the comparative example is 0.981 m / s, the average wind speed in the longitudinal section is 1.197 m / s, the maximum wind speed in the cross section is 7.468 m / s, and the maximum wind speed in the longitudinal section is 8.433 m / s. Among them, the average wind speed can be used to represent the wind speed performance, and the maximum wind speed is used to represent the uniformity. Compared with the comparative example, the wind speed performance of the embodiment can be improved by 118.5% / 128.0%, and the uniformity can be improved by 103.1% / 133.5%.

[0056] The working principle of this embodiment is similar to that of example one or example two, and the difference lies in that:

[0057] The folded baffle 500 has the effect of gathering and pushing the hot air, so as to improve the hot air flow field distribution in the box 100.

[0058] Comparative example

[0059] The prior art steam oven includes a box body 100, a centrifugal fan 200, a motor, a first heating tube 400, a baffle 500 and a reflector 600, the baffle 500 and the reflector 600 are both installed on the back of the box body 100, the first heating tube 400 and the centrifugal fan 200 are arranged between the baffle 500 and the reflector 600, the first heating tube 400 is arranged on the outer periphery of the centrifugal fan 200, and the centrifugal fan 200 is connected to the output shaft of the motor. In the present example, no reflection boss 610 is arranged on the reflector 600; the baffle 500 has air supply holes on the top side of the baffle 500, no air supply holes are arranged in the first air supply area 540 and the fourth air supply area 570, air supply holes are opened on the top surface of the fourth air supply area 570, and air supply holes are arranged at the corners of the second air supply area 550 and the third air supply area 560, the first air supply area 540 and the fourth air supply area 570, as shown in Figure 1 、 Figure 2 the baffle shown in

[0060] The steam oven is subjected to flow field analysis, fluid analysis from the rear view angle and fluid analysis from the front view angle, as shown in Figure 7 、 8 . The flow field distribution in Figure 7 、 8 can be seen. The wind speed generated by the fan reaches 5 m / s or above, but most of it is "blocked" in the rear cavity; the wind speed reaching the food cavity is reduced, and the wind speed is below 2 m / s, and the wind field is chaotic, and the convective heat transfer capacity of the wind is extremely low. The wind flow undergoes many turns in the process, the wind field is chaotic, and the wind loss is very large. In addition, it can be known from the flow field analysis that the average wind speed in the cross section of the box body 100 of the steam oven of the present example is 0.449 m / s, the average wind speed in the longitudinal section is 0.525 m / s, the maximum wind speed in the cross section is 6.942 m / s, and the maximum wind speed in the longitudinal section is 8.638 m / s. Among them, the average wind speed can be used to represent the wind speed performance, and the maximum wind speed can be used to represent the uniformity.

[0061] In the specific content of the above specific embodiments, each technical feature can be combined arbitrarily without contradiction, and in order to make the description simple, not all possible combinations of the above technical features are described, but as long as the combination of these technical features does not exist Contradiction, it should be considered as the scope recorded in this specification.

[0062] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and also impossible to exhaust all the implementation modes. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A steam oven with uniform heating in its internal cavity, characterized in that, The application relates to a heat-drying device, which comprises a box body (100), a centrifugal fan (200), a motor, a first heating tube (400), a partition plate (500) and a reflecting cover (600), wherein the partition plate (500) and the reflecting cover (600) are arranged on the back of the box body (100), the first heating tube (400) and the centrifugal fan (200) are arranged between the partition plate (500) and the reflecting cover (600), the first heating tube (400) is arranged on the outer periphery of the centrifugal fan (200), the centrifugal fan (200) is connected to the output shaft of the motor, and the reflecting cover (600) is provided with a reflecting boss (610) capable of gathering hot air to the inside of the box body (100).

2. The steam oven according to claim 1, wherein The reflecting boss (610) is provided with a slope structure which is outwardly expanded from the inside of the box body (100) to the outside of the box body (100), and the fan is at least partially arranged in the reflecting boss (610).

3. The steam oven according to claim 2, wherein The reflecting boss (610) is a circular boss.

4. The cavity uniform heating steam oven according to any one of claims 1 to 3, wherein, The partition plate (500) comprises a return air area in the middle region and a supply air area around the return air area.

5. The cavity even-heating steam oven according to claim 4, wherein The return air area comprises a first return air area (510), a second return air area (520) and a third return air area (530) which are concentrically arranged from the inside to the outside, the first return air area (510) and the second return air area (520) are arranged in the projection plane of the partition plate (500) formed by the rotation of the centrifugal fan (200), and the third return air area (530) is arranged out of the projection plane of the partition plate (500) formed by the rotation of the centrifugal fan (200).

6. The cavity uniform heating steam oven according to claim 5, wherein, A plurality of first return air holes (511) are uniformly distributed in the first return air area (510), the first return air holes (511) are circular holes; a plurality of second return air holes (521) are uniformly distributed in the second return air area (520), the second return air holes (521) are circular ring holes; and a plurality of third return air holes (531) are uniformly distributed in the third return air area (530), the third return air holes (531) are circular ring holes.

7. The cavity even-heating steam oven according to claim 6, wherein The second return air holes (521) and the third return air holes (531) are distributed on a plurality of circumferences, the second return air holes (521) and the third return air holes (531) are centrally symmetrically distributed, and the arc length of the second return air holes (521) and the third return air holes (531) gradually increases from the inside to the outside.

8. The cavity even-heating steam oven according to claim 4, wherein The first heating tube (400) is arranged in a U shape and comprises a low-temperature area (410), a first heating area (420) and a second heating area (430) which are sequentially connected, the supply air area comprises a first supply air area (540), a second supply air area (550), a third supply air area (560) and a fourth supply air area (570) which are sequentially arranged around the partition plate (500), and the first supply air area (540), the second supply air area (550) and the third supply air area (560) correspond to the low-temperature area (410), the first heating area (420) and the second heating area (430) in position respectively.

9. The cavity even-heating steam oven according to claim 8, wherein, The first air supply area (540), the second air supply area (550), the third air supply area (560) and the fourth air supply area (570) respectively include a plurality of uniformly distributed first air supply holes (541), second air supply holes (551), third air supply holes (561) and fourth air supply holes (571), the number of the first air supply holes (541) is less than the number of the third air supply holes (561), and the number of the fourth air supply holes (571) is less than the number of the second air supply holes (551).

10. The cavity uniform heating steam oven according to any one of claims 5 to 9, characterized in that, The partition plate (500) comprises a first plate area (581), a second plate area (582) and a third plate area (583) arranged in sequence from left to right, the first plate area (581) and the third plate area (583) are symmetrically arranged about the second plate area (582) and both extend into the cabinet (100), and the included angle between the first plate area (581) and the second plate area (582) and the included angle between the third plate area (583) and the second plate area (582) are both obtuse angles.

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