Heat dissipation assembly, steam-baking cooking machine and heat dissipation method

Abstract

The application relates to a heat dissipation assembly, a steam-baking cooking machine and a heat dissipation method. The heat dissipation assembly comprises a fan shell and a heat dissipation fan. The heat dissipation assembly has an upper cavity and a lower cavity which are stacked with each other, a communication hole which is communicated with the upper cavity and the lower cavity, and a first opening and a second opening which are communicated with the upper cavity and are separated from each other. The upper cavity has a first drainage channel which is communicated with the first opening and the communication hole respectively, and a second drainage channel which is communicated with the second opening and the lower cavity and is separated from the first drainage channel. The second opening is used for communicating with a ventilation interlayer of the door assembly. The heat dissipation fan is arranged in the upper cavity and is arranged correspondingly with the communication hole. The heat dissipation fan is used for guiding the air in the ventilation interlayer to flow through the second opening, the second drainage channel, the lower cavity, the communication hole, the first drainage channel and the first opening in sequence. In this way, the air inlet and outlet are not limited by the narrow installation space of the steam-baking cooking machine, the heat dissipation effect is improved, the two drainage channels and the lower cavity are integrated in the same fan shell, and the space occupation of the heat dissipation assembly is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat dissipation technology of steam oven, in particular to a heat dissipation assembly, a steam oven and a heat dissipation method. BACKGROUND

[0002] With the improvement of living standards and the change of eating habits, the steam oven can heat or assist to heat food through a heating pipe to make baked dishes, snacks and other foods, so it is deeply loved by consumers and becomes an indispensable food cooking tool in daily life.

[0003] The steam oven generates high temperature and high pressure to heat food, and accordingly requires the oven door to have good heat insulation function, which is realized by multi-layer tempered glass + LOWE coating. The outer door glass cooling mode is mostly to open the air vents on the door body up and down and left and right or to let the internal heat dissipation fan blow to the internal space of the door assembly through structural design. The existing steam oven heat dissipation air duct structure mostly adopts a centrifugal fan arranged in the door to blow air from the inside of the machine to the outside to take away excess heat. The heat dissipation effect of this structure is poor: the centrifugal fan creates negative pressure in the machine to passively suck in cold air from the outside, and the steam oven is usually installed in a cabinet or attached to a wall. After the machine runs for a period of time, the temperature of the wall or cabinet rises, and the cold air is heated by the cabinet or wall before entering the machine, or in other words, it has absorbed part of the heat, so that the actual heat absorption of the cold air after entering the machine is limited. SUMMARY

[0004] Based on the poor heat dissipation effect of the existing steam oven due to the spatial limitation of its installation environment, it is necessary to provide a heat dissipation structure, a steam oven and a heat dissipation method.

[0005] A heat dissipation assembly for dissipating heat from a door assembly of a steam oven, comprising:

[0006] A fan housing having an upper cavity and a lower cavity stacked with each other, a communication hole communicated with the upper cavity and the lower cavity, and a first opening and a second opening communicated with the upper cavity and separated from each other; the upper cavity has a first drainage channel communicated with the first opening and the communication hole at two ends respectively, and a second drainage channel communicated with the second opening and the lower cavity and separated from the first drainage channel; the second opening is used to communicate with a ventilation interlayer of the door assembly; and

[0007] A heat dissipation fan arranged in the upper cavity and corresponding to the communication hole, used to guide the air in the ventilation interlayer to flow through the second opening, the second drainage channel, the lower cavity, the communication hole, the first drainage channel and the first opening in sequence.

[0008] In this way, the two air flow channels and the lower cavity are integrated in the same fan shell, reducing the space occupation of the heat dissipation assembly and having less impact on the space layout of the top of the steam and baking cooking machine; the first opening and the second opening are integrated into the suction port of the ventilation interlayer, and since the two openings are isolated from each other and the two air flow channels are isolated from each other, the air inlet and outlet do not interfere with each other, and the air inlet and outlet are not limited by the narrow installation space of the steam and baking cooking machine, and the temperature of the air flow is not affected by the temperature rise of the surrounding cabinet or the wall, thereby improving the heat dissipation effect.

[0009] In one of the embodiments, the fan shell comprises a mounting plate, a fan cover, and a partition plate providing the communication hole, the fan cover is fixed to the mounting plate to form the first opening and the second opening between the fan cover and the mounting plate; the partition plate is arranged between the mounting plate and the fan cover to divide the internal space of the fan shell into the upper cavity and the lower cavity.

[0010] In this way, the two air flow channels are surrounded by the fan cover and the partition plate, so that the fan cover can be pre-assembled with the partition plate and then installed together on the mounting plate, simplifying the assembly and increasing the structural strength of the pre-assembly, which is beneficial to increase the stability of the shape of the first air flow channel and the second air flow channel.

[0011] In one of the embodiments, the fan cover comprises a cover plate and an outer ring body and an inner ring body arranged at intervals on the cover plate, the outer ring body is provided with a first notch to surround the upper cavity with the partition plate and the cover plate and an external interface communicated with the upper cavity, the inner ring body is provided with a second notch at the external interface to divide the external interface into the first opening and the second opening, the inner ring body is located in the upper cavity, and the partition plate is provided with a third notch matched with the shape of the inner ring body to divide the upper cavity into the first air flow channel and the second air flow channel.

[0012] In this way, the structure is simplified, the demolding is facilitated, the production cost is reduced, the inner ring body also supports the partition plate, which is beneficial to reduce the deformation of the partition plate and maintain the structural stability of the second air flow channel.

[0013] In one of the embodiments, the inner ring body comprises two stop plates extending from the cover plate to the partition plate, the two stop plates are arranged at intervals near the two ends of the external interface to form the second notch, the two stop plates are connected to each other away from the two ends of the external interface to surround the second air flow channel with the cover plate, and the distance between the two stop plates gradually decreases inward from the second notch.

[0014] In this way, the two stop plates not only guide the airflow in the first airflow channel to reduce wind noise, but also divide the air into two parts when discharging, avoiding the accumulation of air in the first airflow channel, especially when the steam cooking machine is in the steaming mode, which is also conducive to reducing the phenomenon of condensate water in the first airflow channel.

[0015] In one of the embodiments, the two stop plates are arranged in a V shape.

[0016] In this way, the air in the first airflow channel is conveniently divided, reducing wind noise caused by turbulence, increasing the airflow speed at the first opening, speeding up steam discharge, and reducing condensate water in the first airflow channel.

[0017] In one of the embodiments, the inner side of the outer ring body is provided with a stepped surface facing the mounting plate, and the partition plate is attached to the stepped surface.

[0018] In this way, the partition plate is conveniently installed to the fan cover, and in addition, the first airflow channel and the lower cavity are clearly demarcated, and there is no problem of air mixing.

[0019] In one of the embodiments, the fan shell further includes a flow equalization cover fixedly connected to the fan cover and covering the first opening and the second opening, and an adapter installed on the flow equalization cover, the flow equalization cover has a first hole group communicating with the first opening and a second hole group communicating with the second opening, and the two ends of the adapter are respectively covered by the second hole group and a ventilation interlayer for covering the door assembly.

[0020] In this way, on the one hand, air leakage at the suction port is reduced, thereby increasing the negative pressure at the suction port and improving the heat dissipation effect of the door assembly, and on the other hand, the air is guided to be discharged, avoiding the accumulation and mixing of air in the first airflow channel 1011, and reducing condensate water.

[0021] The application also provides a steam cooking machine, which comprises:

[0022] An inner container assembly having an open mouth;

[0023] A door assembly covering the open mouth and having a ventilation interlayer; and

[0024] The heat dissipation assembly as described above, the mounting plate of the heat dissipation assembly is installed on the inner container assembly, and the second opening of the heat dissipation assembly communicates with the ventilation interlayer.

[0025] In this way, this heat dissipation assembly directly extracts air from the ventilation interlayer of the door assembly and does not block the air when discharging, thereby improving the heat dissipation efficiency of the door assembly, and the space occupation in the steam cooking machine is small, which does not affect the space layout of the top of the steam cooking machine.

[0026] This application also provides a heat dissipation method applicable to the aforementioned steam-bake cooking machine, which has a steaming mode and a baking mode, comprising the following steps:

[0027] When the steam oven is in steam mode, the cooling fan is set to rotate only in the forward direction;

[0028] When the steam oven is in baking mode, the cooling fan is set to periodically switch between forward and reverse rotation to alternately cool the door assembly and mounting plate.

[0029] With this setup, the cooling fan in steam mode is also used to expel excess steam from the inner cavity, while in baking mode, the door assembly and mounting plate are cooled alternately to keep the overall temperature of the steam oven balanced and maintain its normal operating temperature. Since steam ovens are usually installed in small spaces, such as cabinets, which are often made of wood materials such as composite boards, eliminating the problem of excessively high local temperatures in the steam oven can also reduce safety hazards.

[0030] In one embodiment, the heat dissipation method further includes the following steps:

[0031] When the steam oven is in baking mode, the temperature of the ventilation jacket and the temperature of the fan casing are detected.

[0032] Determine if the temperature of the ventilation interlayer is greater than the first preset value;

[0033] In response to the temperature of the ventilation interlayer exceeding a first preset value, the cooling fan is controlled to rotate in the forward direction;

[0034] In response to the temperature of the ventilation interlayer being less than or equal to a first preset value, it is determined whether the temperature of the fan casing is greater than a second preset value;

[0035] In response to the temperature of the fan casing exceeding a second preset value, the cooling fan is controlled to reverse; and

[0036] In response to the temperature of the fan casing being less than or equal to a second preset value, the cooling fan is kept rotating in the forward direction.

[0037] This setup allows for precise control over the timing of the forward and reverse rotation of the cooling fan, ensuring that the overall temperature of the steam oven remains balanced. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of a steam oven cooking machine in one embodiment of this application;

[0039] Figure 2 for Figure 1 The diagram shows the structure of the door assembly and inner cavity assembly of the steam oven.

[0040] Figure 3 forFigure 1 Structure diagram of the heat dissipation assembly;

[0041] Figure 4 Structure diagram of the heat dissipation assembly; Figure 2 Structure diagram of the heat dissipation assembly;

[0042] Figure 5 Structure diagram of the heat dissipation assembly; Figure 4 Structure diagram of the heat dissipation assembly;

[0043] Figure 6 Structure diagram of the heat dissipation assembly; Figure 4 Structure diagram of the heat dissipation assembly;

[0044] Figure 7 Structure diagram of the heat dissipation assembly; Figure 4 Structure diagram of the heat dissipation assembly;

[0045] Figure 8 Structure diagram of the heat dissipation assembly; Figure 4 Structure diagram of the heat dissipation assembly;

[0046] Figure 9 Structure diagram of the heat dissipation assembly; Figure 7 Structure diagram of the heat dissipation assembly; Figure 8 Structure diagram of the heat dissipation assembly; Structure diagram of the heat dissipation assembly;

[0047] Structure diagram of the heat dissipation assembly; Figure 10 Structure diagram of the heat dissipation assembly;

[0048] Reference signs:

[0049] 10, fan shell; 101, upper cavity; 1011, first flow channel; 1012, second flow channel; 102, lower cavity; 103, communication hole; 104, first opening; 105, second opening; 11, mounting plate; 12, fan cover; 121, cover plate; 122, outer ring body; 1221, step surface; 123, inner ring body; 1231, stop plate; 124, expansion body; 13, partition plate; 131, third notch; 14, flow equalizing cover; 141, first hole group; 142, second hole group; 15, adapter; 20, heat dissipation fan; 30, door assembly; 301, suction port; 40, inner container assembly; 50, steam passage. DETAILED DESCRIPTION

[0050] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated to cover all such modifications as fall within the scope of the application. It should be noted that the specific embodiments of the present application do not limit the scope of the present application.

[0051] In the description of the application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0052] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0053] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0055] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0056] With the continuous improvement of living standards and changes in eating habits, steam ovens can heat or assist in heating food through heating elements to make baked dishes, desserts and other foods. As a result, they are deeply loved by consumers and have become an indispensable food cooking tool in everyone's daily life.

[0057] Steam ovens generate high temperatures and pressures to heat food, requiring the oven door to have excellent heat insulation. This is achieved through multi-layered tempered glass with a LOW-E coating. Cooling the outer door glass typically involves ventilation openings on the top, bottom, left, and right sides of the door, or structural design that allows internal cooling fans to blow air into the door assembly. Existing steam oven cooling systems often use centrifugal fans installed in the door to blow excess heat from the inside out. This structure has poor heat dissipation: the centrifugal fan creates negative pressure inside the machine, passively drawing in cool outside air. However, steam ovens are usually installed in cabinets or against walls. After the machine runs for a while, the wall or cabinet temperature rises, meaning the cool air has already been heated or absorbed some heat before entering the machine, resulting in limited actual heat absorption upon entry.

[0058] Therefore, it is necessary to provide heat dissipation components, steam ovens, and heat dissipation methods that can improve heat dissipation performance while occupying less space.

[0059] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a steam oven cooking machine in one embodiment of the present invention. Figure 2 for Figure 1 The diagram shows the structure of the door assembly 30 and the inner cavity assembly 40 of the steam oven. Figure 3 for Figure 1 A schematic diagram of the heat dissipation component. The steam oven includes an inner cavity assembly 40, a door assembly 30, and a heat dissipation component. The inner cavity assembly 40 has an opening, and the door assembly 30 covers the opening and has a ventilation layer, a suction port 301 connected to the upper end of the ventilation layer, and an air inlet connected to the lower end of the ventilation layer. The heat dissipation component is installed on the upper side of the inner cavity assembly 40 and is used to draw air from the ventilation layer through the suction port 301.

[0060] Please see Figures 2 to 6 ,Figure 3 for Figure 1 A schematic diagram of the heat dissipation component. Figure 4 for Figure 3 A plan view of the heat dissipation component is shown. Figure 5 for Figure 4 The heat dissipation assembly shown is in cross-sectional view along the AA direction; Figure 6 for Figure 4 The diagram shows a cross-sectional view of the heat dissipation assembly along the BB direction. Specifically, the heat dissipation assembly includes a fan housing 10 and a cooling fan 20. The fan housing 10 has an upper cavity 101 and a lower cavity 102 stacked on top of each other, a connecting hole 103 connecting the upper cavity 101 and the lower cavity 102, and a first opening 104 and a second opening 105 connected to the upper cavity 101 but separated from each other. The upper cavity 101 has a first drainage channel 1011 and a second drainage channel 1012. The two ends of the first drainage channel 1011 are respectively connected to the first opening 104 and the connecting hole 103. The second airflow channel 1012 is isolated from the first airflow channel 1011 and connected to the second opening 105 and the lower cavity 102. The second opening 105 is used to connect the ventilation interlayer of the door assembly 30. The cooling fan 20 is located in the upper cavity 101 and is arranged corresponding to the connecting hole 103. It is used to guide the air in the ventilation interlayer to flow sequentially through the second opening 105, the second airflow channel 1012, the lower cavity 102, the connecting hole 103, the first airflow channel 1011, and the first opening 104. In this way, the two airflow channels and the lower cavity 102 are integrated into the same fan housing 10, reducing the space occupied by the heat dissipation components. The first opening 104 and the second opening 105 are integrated into the suction port 301 of the ventilation interlayer. Since the two openings and the two airflow channels are isolated from each other, the air inlet and outlet will not interfere with each other. The air inlet and outlet will not be restricted by the small installation space of the steam oven, and the temperature of the airflow will not be affected by the temperature rise of the surrounding cabinets or the wall, thereby improving the heat dissipation effect. In addition, a steam channel 50 is provided between the lower cavity 102 and the inner liner. The steam oven has a steam mode and a baking mode. In the steam mode, the steam channel 50 is opened, and excess steam in the inner liner assembly 40 can be extracted by the heat dissipation assembly through the steam channel 50. In one embodiment provided in this application, the heat dissipation fan 20 is a centrifugal fan. It is understood that in other embodiments, the heat dissipation fan 20 may also be an axial fan.

[0061] Please see Figures 3 to 9 , Figure 7 for Figure 4 A schematic diagram of the structure of the stroke unit cover 12. Figure 8 for Figure 4 A schematic diagram of the structure of the middle partition 13. Figure 9 for Figure 7 The fan cover 12 shown is Figure 8The structure of the assembled partition plate 13 is shown in the schematic diagram. Specifically, the fan shell 10 comprises a mounting plate 11, a fan cover 12 and a partition plate 13 providing a communication hole 103, the fan cover 12 is fixedly arranged on the mounting plate 11 to form a first opening 104 and a second opening 105 between the fan cover 12 and the mounting plate 11, and the partition plate 13 is arranged between the mounting plate 11 and the fan cover 12 to divide the internal space of the fan shell 10 into an upper cavity 101 and a lower cavity 102. The two flow guide channels are surrounded by the fan cover 12 and the partition plate 13, so that the fan cover 12 can be pre-assembled with the partition plate 13 and then installed together on the mounting plate 11, which simplifies the assembly and has higher pre-assembly structural strength, thereby being beneficial to increasing the stability of the shape of the first flow guide air duct and the second flow guide air duct.

[0062] Please refer to Figure 5 , Figure 6 and Figure 7 and Figure 8Optionally, in an embodiment provided by the present application, the fan cover 12 comprises a cover plate 121, an outer ring body 122 and an inner ring body 123 which are arranged in the outer ring body 122 and the inner ring body 123 in a spaced manner, the outer ring body 122 is provided with a first gap to form the upper cavity 101 with the partition plate 13 and the cover plate 121, and an external interface which is communicated with the upper cavity 101, the inner ring body 123 is provided with a second gap which is located at the external interface to divide the external interface into the first opening 104 and the second opening 105, the inner ring body 123 is located in the upper cavity 101 and the partition plate 13 is provided with a third gap 131 which matches the shape of the inner ring body 123 to divide the upper cavity 101 into the first drainage passage 1011 and the second drainage passage 1012. In other words, the inner ring body 123 outlines the profile of the second drainage passage 1012 on the cover plate 121, the outer ring body 122 is arranged around the inner ring body 123, the profile of the first drainage passage 1011 is between the inner ring body 123 and the outer ring body 122, the part between the inner ring body 123 and the outer ring body 122 is covered by the partition plate 13 to finally form the first drainage passage 1011, and the third gap 131 provided on the partition plate 13 is used for communication with the second drainage passage 1012. The height of the inner ring body 123 is less than the distance between the cover plate 121 and the mounting plate 11, so as to reserve enough space for the formation of the lower cavity 102. This way of surrounding and forming the drainage passage simplifies the structure, facilitates demolding, and is conducive to reducing production costs. The inner ring body 123 also supports the partition plate 13, which is conducive to reducing the deformation of the partition plate 13, thereby maintaining the structural stability of the second drainage passage 1012. Further, in order to facilitate the installation of the partition plate 13, the inner side of the outer ring body 122 is provided with a stepped surface 1221 which faces the mounting plate 11, and the partition plate 13 is attached to the stepped surface 1221. In this way, the partition plate 13 is fixed to the fan cover 12, the boundary between the first drainage passage 1011 and the lower cavity 102 is clear, and there is no problem of air leakage. The partition plate 13 can be fixed to the stepped surface 1221 of the outer ring body 122 by means of, but not limited to, gluing, welding or buckling. Optionally, the fan cover 12 further comprises an expansion body 124 which extends outward from the side of the outer ring body 122 away from the cover plate 121, and the expansion body 124 abuts against the mounting plate 11. In this way, air leakage in the fan shell 10 can be reduced. It is worth noting that, in this embodiment provided by the present application, the side edge of the partition plate 13 close to the first opening 104 abuts against the mounting plate 11, and the other edges of the partition plate 13 are connected to the inner side wall of the outer ring body 122. In this way, the lower cavity 102 formed by the partition plate 13, the outer ring body 122 and the mounting plate 11 has better sealing performance on the side close to the first opening 104, and there is no problem of air leakage.

[0063] Please refer to Figure 7The inner ring body 123 includes two stop plates 1231 extending from the cover plate 121 to the partition plate 13, the two stop plates 1231 are arranged at intervals near the two ends of the external interface respectively to form a second gap, the two stop plates 1231 are connected to each other away from the two ends of the external interface respectively to form a second flow channel 1012 with the cover plate 121, and the distance between the two stop plates 1231 gradually decreases from the second gap inward. In this way, the two stop plates 1231 not only can guide the airflow in the first flow channel 1011 to reduce wind noise, but also can divide the air into two parts to be discharged when the air is discharged, thereby avoiding the accumulation of air at the first opening 104, especially when the steam cooking oven is in the steaming mode, which is also conducive to reducing the condensate water in the first flow channel 1011. Optionally, the two stop plates 1231 are arranged in a V shape, which also facilitates the diversion of air in the first flow channel 1011, reduces wind noise caused by turbulence, increases the airflow speed at the first opening 104, speeds up the discharge of steam, and reduces the condensate water in the first flow channel 1011. It can be understood that in other embodiments, the two stop plates 1231 can also be arranged in a U shape or a trapezoidal shape, as long as they can guide the air to flow towards the two first openings 104 respectively.

[0064] Please refer to Figure 2 , Figure 3 , Figure 7 and Figure 9 Optionally, in an embodiment provided by the present application, the fan shell 10 further includes a flow equalization cover 14 fixedly connected to the fan cover 12 and covering the first opening 104 and the second opening 105, and an adapter 15 mounted on the flow equalization cover 14, the flow equalization cover 14 has a first hole group 141 communicating with the first opening 104 and a second hole group 142 communicating with the second opening 105, and the two ends of the adapter 15 are respectively covered by the second hole group 142 and the suction port 301 of the door assembly 30. In this way, on the one hand, air leakage at the suction port 301 is reduced, thereby increasing the negative pressure at the suction port 301 and improving the heat dissipation effect on the door assembly 30, and on the other hand, the exhaust air is guided to avoid the accumulation and mixing of air in the first flow channel 1011, thereby reducing the condensate water.

[0065] Please refer to Figure 10 The present application also provides a heat dissipation method, which is suitable for the steam cooking oven described above and has a steaming mode and a baking mode, and the heat dissipation method comprises the following steps:

[0066] When the steam cooking oven is in the steaming mode, the heat dissipation fan 20 is set to rotate in the forward direction only;

[0067] When the steam cooking oven is in the baking mode, the heat dissipation fan 20 is set to periodically switch between the forward rotation and the reverse rotation to alternately cool the door assembly 30 and the mounting plate 11.

[0068] In this way, the heat dissipation fan 20 is also used to exhaust the excess steam in the inner container in the steaming mode, and in the baking mode, the overall temperature of the steaming and baking cooking machine is balanced by taking turns to cool the door assembly 30 and the mounting plate 11, so as to maintain the normal working temperature of the steaming and baking cooking machine. Since the steaming and baking cooking machine is usually installed in a narrow space, such as a cabinet, which is made of wood materials such as synthetic boards, eliminating the problem of excessive local temperature of the steaming and baking cooking machine can also reduce the safety hazards.

[0069] Further, in order to accurately control the switching of the heat dissipation fan 20 between forward rotation and reverse rotation, the second step specifically includes the following steps:

[0070] When the steaming and baking cooking machine is in the baking mode, detecting the temperature of the ventilation interlayer and the temperature of the fan shell 10;

[0071] Determining whether the temperature of the ventilation interlayer is greater than a first preset value;

[0072] In response to the temperature of the ventilation interlayer being greater than the first preset value, controlling the heat dissipation fan 20 to rotate forward;

[0073] In response to the temperature of the ventilation interlayer being less than or equal to the first preset value, determining whether the temperature of the fan shell 10 is greater than a second preset value;

[0074] In response to the temperature of the fan shell 10 being greater than the second preset value, controlling the heat dissipation fan 20 to rotate reversely; and

[0075] In response to the temperature of the fan shell 10 being less than or equal to the second preset value, maintaining the heat dissipation fan 20 to rotate forward.

[0076] It can be understood that the ventilation interlayer and the fan shell 10 are respectively provided with first and second temperature sensors to detect the air temperature. When the heat dissipation fan 20 rotates forward, the heat dissipation assembly preferentially cools the door assembly 30, and only when the temperature in the fan shell 10 rises to the second preset value will the heat dissipation fan 20 be reversed. Since there is no obstruction at the first and second openings 104 and 105, the heat dissipation fan 20 inhales air from the interlayer opening below the ventilation interlayer when rotating forward, and inhales air from the ventilation interlayer at the second opening 105 when rotating forward, which is not affected by the temperature of the back wall or the cabinet. Therefore, after the heat dissipation fan 20 is turned on, the temperature in the door assembly 30 or the fan shell 10 can be quickly reduced to below the first or second preset value, respectively, and the temperature in the door assembly 30 will not be higher than the first preset value while the temperature in the fan shell 10 is also higher than the second preset value.

[0077] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, as long as the combination of the technical features does not exist in contradiction, it shall be considered within the scope of the present disclosure.

[0078] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It shall be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the protection scope of the present application patent shall be subject to the appended claims.

Claims

1. A heat dissipation assembly for dissipating heat from the door assembly (30) of a steam oven, characterized in that, include: A fan housing (10) includes a mounting plate (11), a fan cover (12), and a partition plate (13). The fan cover (12) is fixed to the mounting plate (11). The partition plate (13) is disposed between the mounting plate (11) and the fan cover (12) to divide the internal space of the fan housing (10) into an upper cavity (101) and a lower cavity (102) that are stacked on each other. The fan cover (12) includes a cover plate (121) and an outer ring (122) and an inner ring (123) spaced apart from the cover plate (121). The outer ring (122) has a first notch to form the upper cavity (101) and an external interface communicating with the upper cavity (101) together with the partition plate (13) and the cover plate (121). The inner ring (123) has a second notch located at the external interface to connect the external interface. Divided into a first opening (104) and a second opening (105), the inner ring (123) is located within the upper cavity (101), and the partition plate (13) has a third notch (131) matching the shape of the inner ring (123) to divide the upper cavity (101) into a first drainage channel (1011) and a second drainage channel (1012). The partition plate (13) has a connecting hole (103) connecting the upper cavity (101) and the lower cavity (102). The two ends of the first drainage channel (1011) are connected to the first opening (104) and the connecting hole (103) respectively, and the two ends of the second drainage channel (1012) are connected to the second opening (105) and the lower cavity (102) respectively. The second opening (105) is used to connect the ventilation interlayer of the door assembly (30); and A cooling fan (20) is disposed in the upper cavity (101) and arranged corresponding to the connecting hole (103) to guide the air in the ventilation interlayer to flow sequentially through the second opening (105), the second drainage channel (1012), the lower cavity (102), the connecting hole (103), the first drainage channel (1011) and the first opening (104).

2. The heat dissipation assembly according to claim 1, characterized in that, The inner ring (123) includes two stop plates (1231) extending from the cover plate (121) to the partition plate (13). The two stop plates (1231) are arranged at intervals near the two ends of the external interface to form the second notch. The two stop plates (1231) are connected to each other at the two ends away from the external interface to form the second drainage channel (1012) with the cover plate (121). The distance between the two stop plates (1231) gradually decreases from the second notch inward.

3. The heat dissipation assembly according to claim 2, characterized in that, The two stop plates (1231) are arranged in a V-shape.

4. The heat dissipation assembly according to claim 1, characterized in that, The inner side of the outer ring (122) is provided with a stepped surface (1221) facing the mounting plate (11), and the partition plate (13) is attached to the stepped surface (1221).

5. The heat dissipation assembly according to any one of claims 2 to 4, characterized in that, The fan housing (10) further includes a flow equalization hood (14) fixedly connected to the fan cover (12) and covering the first opening (104) and the second opening (105) and an adapter (15) installed on the flow equalization hood (14). The flow equalization hood (14) has a first group of holes (141) communicating with the first opening (104) and a second group of holes (142) communicating with the second opening (105). The two ends of the adapter (15) are respectively covered by the second group of holes (142) and the ventilation interlayer for covering the door assembly (30).

6. A steam oven, characterized in that, include: The inner liner assembly (40) has an opening; Door assembly (30) covers the opening and has a ventilated interlayer; as well as The heat dissipation assembly as described in any one of claims 1 to 5, wherein the mounting plate (11) of the heat dissipation assembly is mounted on the inner liner assembly (40), and the second opening (105) of the heat dissipation assembly communicates with the ventilation interlayer.

7. A heat dissipation method applicable to the steam-bake cooking machine as described in claim 6, wherein the steam-bake cooking machine has a steaming mode and a baking mode, characterized in that, Includes the following steps: When the steam oven is in steam mode, the cooling fan (20) is set to rotate only in the forward direction; and When the steam oven is in baking mode, the cooling fan (20) is set to periodically switch between forward and reverse rotation to alternately cool the door assembly (30) and the mounting plate (11).

8. The heat dissipation method according to claim 7, characterized in that, It also includes the following steps: When the steam oven is in baking mode, the temperature of the ventilation jacket and the temperature of the fan casing (10) are detected; and Determine if the temperature of the ventilation interlayer is greater than the first preset value; In response to the temperature of the ventilation interlayer being greater than the first preset value, the cooling fan (20) is controlled to rotate in the forward direction; In response to the temperature of the ventilation interlayer being less than or equal to a first preset value, it is determined whether the temperature of the fan casing (10) is greater than a second preset value; In response to the temperature of the fan casing (10) exceeding a second preset value, the cooling fan (20) is controlled to reverse; and In response to the temperature of the fan casing (10) being less than or equal to a second preset value, the cooling fan (20) is kept rotating in the forward direction.

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