Air duct structure and cooking equipment

Abstract

The utility model relates to an air duct structure and cooking equipment. The air duct structure comprises an air duct shell and a centrifugal fan, a partition plate is fixedly arranged in the air duct shell to divide the interior of the air duct shell into an upper air duct cavity and a lower air duct cavity, the upper air duct cavity is provided with an air outlet communicated with the outside, and the lower air duct cavity is provided with an air inlet communicated with the outside and a steam inlet communicated with the inner container. The centrifugal fan is arranged in the upper air duct cavity, a ventilation hole communicating the upper air duct cavity and the lower air duct cavity is formed in the partition plate in a penetrating mode, and the ventilation hole directly faces the centrifugal fan in the axis direction of the centrifugal fan; the interior of the air duct shell is divided into the double-air-duct structure through the partition plate, so that the centrifugal fan can be installed in the air duct structure to be used for air outlet, and compared with a cross-flow fan, the centrifugal fan has the advantages of being large in air volume, low in noise, low in cost and the like, and therefore on the premise that it is guaranteed that the air volume meets the moisture removal and heat dissipation requirements, the air volume can be reduced, and the heat dissipation efficiency is improved. And the effects of reducing noise and equipment cost are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field related to cooking equipment, in particular to an air duct structure and cooking equipment. Background Art

[0002] Most cooking devices currently on the market, such as steamers, steam ovens, integrated stoves (with steamers), etc., are equipped with exhaust structures inside to discharge steam generated during the cooking process or to dissipate heat from the equipment.

[0003] However, existing exhaust structures mostly use a cross-flow fan and a single cold air duct to exhaust the hot air inside the equipment. The single cold air duct structure requires a large air volume, so the power of the cross-flow fan and the volume of the air duct are high, which leads to relatively high equipment costs. At the same time, the noise generated by the fan is also relatively large. Utility Model Content

[0004] Based on this, it is necessary to provide a duct structure and cooking equipment with low cost and low noise while meeting the air volume requirements, in order to address the problem that the existing single cold air duct structure requires a large air volume, which leads to high equipment cost and high fan operating noise.

[0005] The present application first provides an air duct structure, including an air duct housing and a centrifugal fan, wherein a partition is fixedly arranged in the air duct housing to separate the interior of the air duct housing into an upper air duct cavity and a lower air duct cavity, wherein the upper air duct cavity has an air outlet connected to the outside, and the lower air duct cavity has an air inlet connected to the outside and a steam inlet connected to the inner tank;

[0006] The centrifugal fan is arranged inside the upper air duct cavity, and the partition plate is provided with a ventilation hole connecting the upper air duct cavity and the lower air duct cavity, and the ventilation hole is directly opposite to the centrifugal fan along the axial direction of the centrifugal fan.

[0007] In one of the embodiments, the air duct housing is further connected to a plurality of air inlet ducts, and one end of each of the air inlet ducts is connected to the lower air duct cavity, and the other end is connected to the outside.

[0008] In one embodiment, the air duct housing includes a volute portion and a diffuser portion that are interconnected, the centrifugal fan is disposed in the volute portion, the air inlet and the air outlet are both located in the diffuser portion, each of the air inlet ducts is connected to the volute portion, and each of the air inlet ducts is arranged circumferentially with the axis of the centrifugal fan as the center.

[0009] In one of the embodiments, the air duct housing is provided with air guide plates corresponding to the air inlet and the air outlet, the air guide plate at the air inlet faces the door opening, and the air guide plate at the air outlet faces the control panel.

[0010] In one of the embodiments, the partition is also provided with a convection hole connecting the upper air duct cavity and the lower air duct cavity, the convection hole is located between the air outlet and the centrifugal fan, and the convection hole is directly opposite to the steam inlet, and the air duct structure also includes an adjustment component capable of closing or opening the convection hole.

[0011] In one of the embodiments, the adjustment assembly includes a motor and an adjustment plate, the motor is fixed relative to the air duct housing, and the adjustment plate is in contact with the partition and fixed to the rotating end of the motor.

[0012] In one of the embodiments, the motor is located outside the air duct housing, a heat dissipation hole is formed through the side wall of the upper air duct cavity, and the adjustment plate passes through the heat dissipation hole to the upper air duct cavity.

[0013] In one of the embodiments, the regulating assembly further includes a wind shield, which is located on a side of the convection hole away from the centrifugal fan, and the wind shield faces the steam inlet.

[0014] In one of the embodiments, the wind deflector is hinged to the partition.

[0015] A second aspect of the present application provides a cooking device, comprising a device body and the above-mentioned air duct structure, wherein the device body comprises an inner pot, and the air duct structure is arranged in the device body.

[0016] The above-mentioned air duct structure divides the interior of the air duct shell into a double air duct structure of an upper air duct cavity and a lower air duct cavity through a partition, so that a centrifugal fan can be installed in the air duct structure of the present application for air outlet. Compared with a cross-flow fan, a centrifugal fan has the characteristics of large air volume, low noise and low cost. Therefore, the air duct structure of the present application can achieve the effect of reducing noise and equipment cost while ensuring that the air volume meets the dehumidification and heat dissipation requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A cross-sectional view of the cooking structure of the present application;

[0018] Figure 2 for Figure 1 A three-dimensional view of the structure of the middle wind channel;

[0019] Figure 3 for Figure 2 Airflow direction diagram;

[0020] Figure 4 for Figure 2 Airflow direction diagram of the middle and upper air duct cavity;

[0021] Figure 5 for Figure 2 Airflow direction diagram of the middle and lower air duct cavity;

[0022] Figure 6 for Figure 2 Enlarged view of point A in the middle.

[0023] Figure numerals: 100, inner tank; 10, air duct casing; 10a, volute part; 10b, diffuser; 11, partition; 111, ventilation hole; 112, convection hole; 12, upper air duct cavity; 121, air outlet; 122, heat dissipation hole; 13, lower air duct cavity; 131, air inlet; 132, steam inlet; 14, air inlet duct; 15, air guide plate; 16, adjustment component; 161, motor; 162, adjustment plate; 163, wind shield; 20, centrifugal fan. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean 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, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0030] Please combine Figure 1 , Figure 2 as well as Figure 3 As shown, the present application first provides an air duct structure, including an air duct shell 10 and a centrifugal fan 20, a partition 11 is fixedly provided in the air duct shell 10 to divide the interior of the air duct shell 10 into an upper air duct chamber 12 and a lower air duct chamber 13, the upper air duct chamber 12 has an air outlet 121 connected to the outside, the lower air duct chamber 13 has an air inlet 131 connected to the outside and a steam inlet 132 connected to the inner tank 100; the centrifugal fan 20 is arranged in the upper air duct chamber 12, and the partition 11 is provided with a ventilation hole 111 connecting the upper air duct chamber 12 and the lower air duct chamber 13, and the ventilation hole 111 is directly opposite to the centrifugal fan 20 along the axial direction of the centrifugal fan 20.

[0031] For ease of understanding, the solid arrows in the drawings of this application represent the direction of hot air flow, and the dotted arrows represent the direction of steam flow.

[0032] In the present application, the interior of the air duct housing 10 is divided into a double air duct structure of an upper air duct cavity 12 and a lower air duct cavity 13 by a partition 11, so that a centrifugal fan 20 can be installed in the air duct structure of the present application for air outlet. Compared with the cross-flow fan, the centrifugal fan 20 has the characteristics of large air volume, low noise and low cost. Therefore, the air duct structure of the present application can achieve the effect of reducing noise and equipment cost while ensuring that the air volume meets the dehumidification and heat dissipation requirements.

[0033] Specifically, a centrifugal fan 20 is arranged in the upper air duct cavity 12. After the centrifugal fan 20 is started, negative pressure is generated at its center position, so that the steam in the inner tank enters the lower air duct cavity 13 through the steam inlet 132, and the hot air at the heat dissipation position enters the lower air duct cavity 13 through the air inlet 131. The steam and hot air sucked into the lower air duct cavity 13 will be further sucked into the centrifugal fan 20 along the ventilation hole 111, and discharged to the upper air duct cavity 12 along the circumference of the centrifugal fan 20, and finally discharged from the air outlet 121 along the upper air duct cavity 12, thereby achieving dehumidification of the inner tank and ventilation and heat dissipation of the heat dissipation position.

[0034] More specifically, the air inlet 131 faces the opening of the door body, and the air outlet 121 faces the control panel. That is, the air duct structure of the present application can, on the one hand, suck in the hot air inside the door body to cool the door body, and on the other hand, can also cool the control panel through the airflow blown out by the air outlet 121.

[0035] Please combine Figure 4 as well as Figure 5 As shown, in some embodiments, the air duct housing 10 is further connected to a plurality of air inlet ducts 14, and one end of each air inlet duct 14 is connected to the lower air duct cavity 13, and the other end is connected to the outside.

[0036] The multiple air inlet ducts 14 can increase the air intake volume of the lower air duct cavity 13 when the areas of the air inlet 131 and the steam inlet 132 are constant, thereby improving the air volume of the air duct structure of the present application.

[0037] Please refer to Figure 2 as well as Figure 5 As shown, in some embodiments, the air duct housing 10 includes a volute portion 10a and a diffuser portion 10b that are interconnected, the centrifugal fan 20 is disposed in the volute portion 10a, the air inlet 131 and the air outlet 121 are both located in the diffuser portion 10b, each air inlet duct 14 is connected to the volute portion 10a, and each air inlet duct 14 is arranged circumferentially with the axis of the centrifugal fan 20 as the center.

[0038] It is worth mentioning that the volute profile of the volute portion 10a is an Archimedean profile, which, combined with the circumferential air intake of each air inlet duct 14, can effectively improve the air intake uniformity and air outlet volume of the air duct structure of the present application.

[0039] Preferably, the volute portion 10a is connected to three air inlet ducts 14, and the three air inlet ducts 14 and the air inlets 131 are arranged at intervals of 90 degrees.

[0040] Of course, the number and arrangement of the air inlet ducts 14 can also be adjusted according to actual needs, and this application does not make any further limitations here.

[0041] Please combine Figure 2 , Figure 3 as well as Figure 6 As shown, in some embodiments, the air duct housing 10 is provided with an air guide plate 15 corresponding to the air inlet 131 and the air outlet 121. The air guide plate 15 at the air inlet 131 faces the door opening, and the air guide plate 15 at the air outlet 121 faces the control panel; the air guide plate 15 can play a guiding and drainage effect.

[0042] It should be noted that most of the exhaust structures in existing cooking equipment cannot control the heat dissipation and dehumidification functions; however, in the actual cooking process, different requirements may be placed on heat dissipation and dehumidification depending on the food or usage conditions. Take a steamer as an example: during the cooking process, sufficient steam is required and less steam is exhausted to the outside, but less steam is desired at the moment the door is opened to prevent a large amount of steam from escaping from the door after it is opened; and for an oven: when cooking most foods, it is desired that less hot air is exhausted to the outside and the heat is concentrated in the inner pot. For a few foods with sufficient moisture and a large amount of steam after baking, such as steamed cakes and chiffon cakes, it is desired that the exhaust be smooth so that the water vapor after baking is discharged as soon as possible and not retained in the inner pot, so that the baking speed is fast and the cake is soft and not collapsed.

[0043] In this regard, please combine Figure 2 , Figure 3 as well as Figure 6 As shown, in some embodiments, the partition 11 is also provided with a convection hole 112 connecting the upper air duct cavity 12 and the lower air duct cavity 13, the convection hole 112 is located between the air outlet 121 and the centrifugal fan 20, and the convection hole 112 is opposite to the steam inlet 132, and the air duct structure also includes an adjustment component 16 capable of closing or opening the convection hole 112.

[0044] Specifically, when the adjustment component 16 closes the convection hole 112, the air flow direction in the air duct structure is: air inlet 131, steam inlet 132 → lower air duct cavity 13 → centrifugal fan 20 → upper air duct cavity 12 → air outlet 121. At this time, the dehumidification and heat dissipation effects are achieved under the action of the centrifugal fan 20.

[0045] When the adjustment component 16 opens the convection hole 112, part of the airflow in the upper air duct cavity 12 will enter the lower air duct cavity 13 through the convection hole 112, and because the convection hole 112 is directly opposite to the steam inlet 132, this part of the airflow will convect with the steam airflow discharged to the lower air duct cavity 13 through the steam inlet 132, thereby hindering the steam airflow from the inner tank 100 to enter the lower air duct cavity 13 through the steam inlet 132. At this time, under the action of the centrifugal fan 20, only the effect of heat dissipation is achieved.

[0046] Therefore, by closing or opening the convection holes 112 by adjusting the component 16, it is possible to control whether to discharge moisture, thereby meeting the cooking requirements of different foods and situations, thereby improving the versatility of the air duct structure of the present application.

[0047] Please refer to Figure 6 As shown, in some embodiments, the adjustment assembly 16 includes a motor 161 and an adjustment plate 162 . The motor 161 is fixed relative to the air duct housing 10 , and the adjustment plate 162 is in contact with the partition 11 and fixed to the rotating end of the motor 161 .

[0048] Of course, the regulating component 16 may also adopt other structures, as long as it can close or open the convection hole 112 as needed, and the present application does not make any further limitations here.

[0049] Please refer to Figure 6 As shown, in some embodiments, the motor 161 is located outside the air duct housing 10, a heat dissipation hole 122 is opened through the side wall of the upper air duct cavity 12, and the adjustment plate 162 passes through the heat dissipation hole 122 to the upper air duct cavity 12; part of the airflow in the upper air duct cavity 12 can be blown out through the heat dissipation hole 122 and dissipate the heat of the motor 161.

[0050] Please combine Figure 2 , Figure 3 as well as Figure 6 As shown, in some embodiments, the regulating component 16 also includes a wind shield 163, which is located on the side of the convection hole 112 away from the centrifugal fan 20, and the wind shield 163 faces the steam inlet 132; the wind shield 163 can have a guide effect, which can block part of the airflow in the upper air duct cavity 12 and guide it to form convection with the airflow of the steam inlet 132.

[0051] The wind shield 163 can be set on the partition 11 or on the inner wall of the upper air duct cavity 12. As long as it can guide the airflow in the upper air duct cavity 12 to form convection with the airflow of the steam inlet 132, the present application does not make further limitations here.

[0052] Please refer to Figure 6 As shown, the wind deflector 163 is hinged to the partition 11;

[0053] When the adjustment plate 162 blocks the convection hole 112, the wind shield 163 is blocked by the adjustment plate 162 and cannot be opened upward; when the adjustment plate 162 does not block the convection hole 112, the wind shield 163 opens upward under the action of the airflow blown out from the steam inlet 132, and remains in the open state under the action of the airflow blown laterally in the upper air duct cavity 12, thereby blocking part of the airflow in the upper air duct cavity 12 and guiding it to convection with the airflow of the steam inlet 132.

[0054] Compared with the solution in which the wind shield 163 is fixed, with such a configuration, when the adjustment plate 162 blocks the convection hole 112 , the wind shield 163 will not block the airflow, thereby increasing the air output in this state and improving the heat dissipation and dehumidification effects.

[0055] A second aspect of the present application provides a cooking device, including a device body and the above-mentioned air duct structure, the device body includes an inner pot 100, and the air duct structure is arranged in the device body.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0057] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An air duct structure, characterized in that: The invention comprises an air duct housing (10) and a centrifugal fan (20); a partition plate (11) is fixedly arranged in the air duct housing (10) to divide the interior of the air duct housing (10) into an upper air duct chamber (12) and a lower air duct chamber (13); the upper air duct chamber (12) has an air outlet (121) communicating with the outside, and the lower air duct chamber (13) has an air inlet (131) communicating with the outside and a steam inlet (132) communicating with the inner tank (100); The centrifugal fan (20) is arranged inside the upper air duct cavity (12); the partition plate (11) is provided with a ventilation hole (111) which is connected to the upper air duct cavity (12) and the lower air duct cavity (13); the ventilation hole (111) is directly opposite to the centrifugal fan (20) along the axial direction of the centrifugal fan (20).

2. The air duct structure according to claim 1, characterized in that: The air duct housing (10) is also connected to a plurality of air inlet ducts (14), one end of each of the air inlet ducts (14) is connected to the lower air duct cavity (13), and the other end is connected to the outside.

3. The air duct structure according to claim 2, characterized in that: The air duct housing (10) comprises a volute portion (10a) and a diffuser portion (10b) which are connected to each other, the centrifugal fan (20) is arranged in the volute portion (10a), the air inlet (131) and the air outlet (121) are both located in the diffuser portion (10b), each of the air inlet ducts (14) is connected to the volute portion (10a), and each of the air inlet ducts (14) is arranged circumferentially with the axis of the centrifugal fan (20) as the center.

4. The air duct structure according to claim 1, characterized in that: The air duct housing (10) is provided with an air guide plate (15) corresponding to the air inlet (131) and the air outlet (121); the air guide plate (15) at the air inlet (131) faces the door opening, and the air guide plate (15) at the air outlet (121) faces the control panel.

5. The air duct structure according to any one of claims 1 to 4, characterized in that: The partition plate (11) is also provided with a convection hole (112) connecting the upper air duct cavity (12) and the lower air duct cavity (13); the convection hole (112) is located between the air outlet (121) and the centrifugal fan (20), and the convection hole (112) is directly opposite to the steam inlet (132); the air duct structure also includes an adjustment component (16) capable of closing or opening the convection hole (112).

6. The air duct structure according to claim 5, characterized in that: The adjustment component (16) comprises a motor (161) and an adjustment plate (162); the motor (161) is fixed relative to the air duct housing (10); and the adjustment plate (162) is in contact with the partition plate (11) and is fixed to the rotating end of the motor (161).

7. The air duct structure according to claim 6, characterized in that: The motor (161) is located outside the air duct housing (10), a heat dissipation hole (122) is provided through the side wall of the upper air duct cavity (12), and the adjustment plate (162) passes through the heat dissipation hole (122) to the interior of the upper air duct cavity (12).

8. The air duct structure according to claim 6, characterized in that: The regulating assembly (16) further comprises a wind shield (163), wherein the wind shield (163) is located on a side of the convection hole (112) away from the centrifugal fan (20), and the wind shield (163) faces the steam inlet (132).

9. The air duct structure according to claim 8, characterized in that: The wind deflector (163) is hinged to the partition (11).

10. A cooking device, characterized in that: It comprises a device body and an air duct structure as claimed in any one of claims 1 to 9, wherein the device body comprises an inner tank (100), and the air duct structure is arranged in the device body.

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