Fan assembly, steam condensing device and cooking equipment

Abstract

The utility model belongs to the technical field of electric appliances, and discloses a fan assembly, a steam condensing device and cooking equipment. The fan assembly comprises a fan cover, a driving motor, a centrifugal impeller and an axial flow impeller, the fan cover is provided with an air inlet, a heat dissipation air cavity and an air outlet which are communicated in sequence, and the driving motor is installed on the fan cover; the centrifugal impeller and the axial-flow impeller are coaxially installed on an output shaft of the driving motor at intervals, the centrifugal impeller is located in the heat dissipation air cavity, the air outlet is located in the radial side portion of the centrifugal impeller, and the axial-flow impeller is located outside the side, away from the air inlet, of the fan cover. The steam condensation device comprises a fan assembly and a condensation assembly, the condensation assembly is arranged at the air outlet, and the centrifugal impeller guides external cooling to be blown to the condensation assembly. According to the cooking equipment, the occupied space of the fan assembly can be saved, the cost is reduced, and the structural compactness and miniaturization arrangement of the cooking equipment are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to a fan assembly, a steam condensing device, and a cooking equipment. Background Technology

[0002] With the development of technology and the improvement of people's living standards, cooking equipment such as electric steamers, steam ovens, and ovens are increasingly used in home life, enriching users' choices of cooking methods and improving their cooking experience.

[0003] In cooking equipment with steaming and baking functions, the back of the cooking cavity is usually equipped with an electric heating element and a baffle fan. The electric heating element is used to heat the air inside the cooking cavity, and the baffle fan is used to promote airflow inside the cooking cavity, thereby improving the temperature uniformity inside the cooking cavity and ensuring better cooking results. The outside of the cooking cavity is equipped with a condenser pipe and a cooling fan. One end of the condenser pipe is connected to the cooking cavity so that the steam discharged from the cooking cavity can enter the condenser pipe for cooling and condensation during steam cooking. The cooling fan guides the external airflow to the condenser pipe to dissipate heat and improve the condensation effect of the condenser pipe.

[0004] Existing cooking equipment requires separate installation of turbulence fans and cooling fans to achieve steaming and baking functions, resulting in a complex overall structure and a large footprint, which is not conducive to cost reduction and miniaturization. Utility Model Content

[0005] The purpose of this utility model is to provide a fan assembly, a steam condensation device, and a cooking equipment, which can reduce the structural complexity of the cooking equipment, improve the structural compactness, and facilitate cost reduction and miniaturization of the cooking equipment.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A fan assembly includes a fan shroud, a drive motor, a centrifugal impeller, and an axial flow impeller. The fan shroud has an air inlet, a heat dissipation chamber, and an air outlet connected in sequence. The drive motor is mounted on the fan shroud.

[0008] The centrifugal impeller and the axial impeller are coaxially and spaced apart on the output shaft of the drive motor. The centrifugal impeller is located in the heat dissipation cavity, the air outlet is located on the radial side of the centrifugal impeller, and the axial impeller is located on the outside of the fan cover on the side away from the air inlet.

[0009] As an optional technical solution for a fan assembly, the cross-section of the output shaft is a non-circular cross-section, the centrifugal impeller has a first shaft hole at its center, and the axial impeller has a second shaft hole at its center. The shapes of the first shaft hole and the second shaft hole are the same as the cross-sectional shape of the output shaft, and the output shaft passes through the first shaft hole and the second shaft hole in sequence.

[0010] And / or, a bushing is fitted on the output shaft, and the bushing is sandwiched between the centrifugal impeller and the axial flow impeller.

[0011] As an optional technical solution for a wind turbine component, the bushing is made of heat-insulating material;

[0012] And / or, the end of the output shaft away from the motor housing has a threaded section, the threaded section is screwed with a locking nut, and the axial flow impeller is axially limited between the bushing and the locking nut.

[0013] As an optional technical solution for a fan component, the centrifugal impeller includes a mounting plate portion and an impeller disk portion coaxially connected to the outer periphery of the mounting plate portion. The impeller disk portion has a plurality of blades arranged sequentially along the circumference of the mounting plate portion. A first shaft hole is opened at the center of the mounting plate portion, and the output shaft passes through the first shaft hole.

[0014] The mounting plate has a weight-reducing hole, and / or, at least one side of the mounting plate has a boss protruding along the axial direction of the output shaft, and the first shaft hole passes through the boss.

[0015] As an optional technical solution for a fan assembly, the center of the mounting plate is recessed in the direction toward the air inlet to form a central recess, and the protrusions are provided on both sides of the central recess.

[0016] And / or, the center of the mounting plate is recessed in the direction toward the air inlet to form a central recess, the first shaft hole is opened in the center of the central recess, the weight reduction hole is located between the central recess and the impeller plate, and a plurality of weight reduction holes are arranged at circumferential intervals along the central recess.

[0017] As an optional technical solution for a fan assembly, the motor housing of the drive motor extends radially outward from the end away from the axial flow impeller, and multiple mounting ears are arranged at intervals along the circumference of the motor housing and are detachably connected to the fan cover.

[0018] And / or, the motor housing passes through the air inlet and the end away from the output shaft is located outside the fan cover.

[0019] As an optional technical solution for a wind turbine component, the mounting ear includes a transition portion and an ear plate portion connected at an angle. The first end of the transition portion is connected to the motor housing, and the second end of the transition portion extends in the direction toward the centrifugal impeller and is connected to the ear plate portion. The ear plate portion extends radially outward along the motor housing.

[0020] And / or, the fan cover has a mounting ring portion coaxially arranged with the air inlet and a connecting arm portion connecting the mounting ring portion and the edge of the air inlet. In the axial direction of the output shaft, the mounting ring portion is spaced apart on the side of the air inlet away from the centrifugal impeller. Multiple connecting arms are spaced apart circumferentially along the mounting ring portion. The motor housing passes through the mounting ring portion, and the mounting lug is connected to the mounting ring portion.

[0021] A steam condensation apparatus, comprising:

[0022] The wind turbine components as described above;

[0023] A condensing assembly is disposed at the air outlet, and the condensing assembly has a condensing channel for introducing steam. The centrifugal impeller guides the external cooling airflow sequentially through the air inlet, the heat dissipation cavity and the air outlet to the condensing assembly.

[0024] As an optional technical solution for a steam condensation device, the steam condensation device further includes a duct assembly for forming a hot air chamber with the inner liner. The fan shroud is installed on one side of the duct assembly, the output shaft passes through the duct assembly, and the axial flow impeller is located on the opposite side of the duct assembly in the hot air chamber.

[0025] As an optional technical solution for a steam condensation device, the air duct assembly has a partition cavity, and the heat dissipation air cavity, the partition cavity, and the hot air cavity are sequentially separated along the axial direction of the output shaft.

[0026] A cooking device includes an electric heating element and an inner pot having a cooking cavity, and further includes a steam condensing device as described above. The steam condensing device is installed on the outside of the inner pot and surrounds the inner pot to form a hot air cavity. The fan cover is located on the side of the hot air cavity away from the inner pot. The cooking cavity has multiple airflow holes communicating with the hot air cavity. The axial flow impeller is installed in the hot air cavity.

[0027] The beneficial effects of this utility model are:

[0028] The fan assembly provided by this utility model features a centrifugal impeller and an axial impeller coaxially and spaced apart on the output shaft of the drive motor. The axial impeller is located on the outer side of the centrifugal impeller away from the air inlet. When the fan assembly is applied to cooking equipment, the axial impeller can be used to turbulentize the airflow inside the cooking chamber, while the centrifugal impeller guides the cooling airflow outside the cooking chamber to the air outlet on the side of the centrifugal impeller. This allows the fan assembly to simultaneously meet the turbulence inside the cooking chamber and the condensation and heat dissipation needs outside the cooking chamber, ensuring the normal operation of the cooking equipment. It achieves simultaneous rotation of the centrifugal impeller and the axial impeller by a single drive motor, reducing the number of drive components required for the rotation of the centrifugal impeller and the axial impeller, lowering costs, improving the structural compactness of the fan assembly, and reducing the overall footprint of the fan assembly. At the same time, since the air outlet is located on the radial side of the centrifugal impeller, the condenser assembly used in conjunction with the fan assembly can be arranged side by side, improving the layout rationality and facilitating the guidance of the cooling airflow to the condenser assembly. The steam condensing device provided by this utility model has a high degree of structural compactness due to the use of the above-mentioned fan assembly, with the axial impeller and air inlet located on opposite sides of the fan cover and the centrifugal impeller located in the heat dissipation air cavity; at the same time, since the air outlet is located on the side of the axial impeller, it is beneficial to guide the cooling airflow to blow towards the condensing assembly, thereby improving the condensing and heat dissipation effect of the condensing assembly.

[0029] The cooking equipment provided by this utility model, by adopting the above-mentioned steam condensation device, can improve the structural compactness of the cooking equipment, reduce the structural complexity and cost of the cooking equipment, and facilitate the cost reduction and miniaturization design of the cooking equipment. Attached Figure Description

[0030] Figure 1 This is a partial structural schematic diagram of the cooking equipment provided in this embodiment of the utility model;

[0031] Figure 2 This is a schematic diagram of the steam condensation device provided in an embodiment of the present invention;

[0032] Figure 3 yes Figure 2 A magnified view of a section at point I;

[0033] Figure 4 This is a cross-sectional view of the steam condensing device provided in this embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the fan assembly (without the fan cover) provided in this embodiment of the utility model;

[0035] Figure 6 This is a cross-sectional view of the fan assembly (without the fan cover) provided in an embodiment of this utility model;

[0036] Figure 7 yes Figure 6A magnified view of a section at point J.

[0037] In the picture:

[0038] 100. Steam condensation device; 200. Inner tank; 300. Water tank; 400. Base; 500. Heating element;

[0039] 1. Fan assembly; 11. Drive motor; 111. Output shaft; 112. Motor housing; 113. Mounting lug; 1131. Lug plate; 1132. Adapter; 12. Centrifugal impeller; 121. Mounting disc; 1211. Central recess; 1212. Weight reduction hole; 122. Impeller disc; 123. Boss; 124. First shaft hole; 13. Axial flow impeller; 131. Central disc; 1311. Second shaft hole; 1312. Concave disc; 132. Fan blade; 1321. First blade 1322, Second blade; 14, Fan cover; 141, Top plate; 1411, Air inlet; 142, Side plate; 143, Motor mounting; 1431, Mounting ring; 1432, Connecting arm; 144, Fixing plate; 15, Bushing; 151, Main sleeve; 152, Flange; 16, First limiting structure; 161, Limiting ring; 162, Stop washer; 17, Second limiting structure; 171, Locking nut; 172, Locking washer; 173, Washer;

[0040] 2. Air duct assembly; 21. External air duct panel; 22. Internal air duct panel; 221. Cavity; 23. Partition cavity;

[0041] 3. Condensation assembly; 31. Radiator; 32. Condensation tube;

[0042] 4. Sealing ring; 5. Water collection box; 6. Drain pipe. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] This embodiment provides a cooking device that has steaming and baking functions, satisfying users' choices of different cooking methods, and improving the simplified structure and reducing the cost of the cooking device. The cooking device can be, but is not limited to, a steam oven, a microwave-steam-oven combination, etc.

[0048] like Figure 1 and Figure 2 As shown, the cooking equipment provided in this embodiment includes a body, a steam supply component, an electric heating element 500, and a control module. The body includes an inner liner 200, a casing surrounding the inner liner 200, and a base 400 installed at the bottom of the inner liner 200. The inner liner 200 has a cooking cavity with an open front side. The steam supply component is installed between the inner liner 200 and the casing to provide hot steam to the inside of the cooking cavity to meet the needs of steaming and cooking food. The electric heating element 500 is installed in the inner liner 200 to heat the air inside the cooking cavity to meet the baking and heating functions of food. The control module is communicatively connected to both the steam supply component and the electric heating element 500 to control their operation.

[0049] In this embodiment, the structural configuration of the inner liner 200, base 400, housing, steam supply component and control device can be set with reference to the prior art. This is not the focus of this utility model and will not be described in detail here.

[0050] In this embodiment, the cooking equipment further includes a steam condensation device 100, which includes a fan assembly 1 and a condensation assembly 3. The fan assembly 1 includes a fan shroud 14, a drive motor 11, a centrifugal impeller 12, and an axial impeller 13. The fan shroud 14 has an air inlet 1411, a heat dissipation chamber, and an air outlet connected in sequence. The drive motor 11 is mounted on the fan shroud 14. The centrifugal impeller 12 and the axial impeller 13 are coaxially and spaced apart on the output shaft 111 of the drive motor 11. The centrifugal impeller 12 is located between the motor housing 112 and the axial impeller 13 and inside the heat dissipation chamber. The axial impeller 13 is located outside the fan shroud 14 on the side away from the air inlet 1411, and the air outlet is located outside the radial side of the centrifugal impeller 12.

[0051] The condenser assembly 3 is located at the air outlet and has a condensation channel for introducing steam. The condensation channel is connected to the cooking cavity so that the steam in the cooking cavity can enter the condensation channel. The axial impeller 13 guides the external cooling airflow sequentially through the air inlet 1411, the heat dissipation cavity, and the air outlet to the condenser assembly 3 to condense and dissipate heat from the steam in the condensation channel.

[0052] The steam condenser 100 is installed on the outside of the inner liner 200, and the steam condenser 100 and the inner liner 200 form a hot air cavity. The hot air cavity and the heat dissipation cavity are separated on the shaft of the output shaft 111. The inner liner 200 has an airflow hole that communicates with the hot air cavity. The axial flow impeller 13 is located in the hot air cavity to realize the circulation of hot air in the cooking cavity.

[0053] The fan assembly 1 and steam condensing device 100 provided in this embodiment are equipped with a centrifugal impeller 12 and an axial impeller 13 coaxially and spaced on the output shaft 111 of the drive motor 11. The axial impeller 13 is located on the side of the centrifugal impeller 12 away from the air inlet 1411. When the fan assembly 1 is applied to the cooking equipment, the axial impeller 13 is installed in the hot air cavity to turbulentize the airflow inside the cooking cavity. Meanwhile, the centrifugal impeller 12 guides the cooling airflow outside the cooking cavity to the condensing assembly 3 on the side of the centrifugal impeller 12 to achieve steam condensation and heat dissipation. This allows the fan assembly 1 to simultaneously meet the turbulence inside the cooking cavity and the condensation and heat dissipation requirements outside the cooking cavity, ensuring the normal operation of the cooking equipment. The simultaneous rotation of the centrifugal impeller 12 and the axial impeller 13 by a single drive motor 11 reduces the number of drive components required for the rotation of the centrifugal impeller 12 and the axial impeller 13, lowers the cost, improves the structural compactness of the fan assembly 1 and the steam condensing device 100, and reduces the overall footprint of the fan assembly 1.

[0054] like Figures 3 to 5As shown, to improve the installation stability of the centrifugal impeller 12 and the cooling impeller on the output shaft 111, the cross-section of the output shaft 111 is a non-circular cross-section. The centrifugal impeller 12 has a first shaft hole 124 at its center, and the axial flow impeller 13 has a second shaft hole 1311 at its center. The shapes of the first shaft hole 124 and the second shaft hole 1311 are the same as the cross-sectional shape of the output shaft 111, and the output shaft 111 passes through the first shaft hole 124 and the second shaft hole 1311 in sequence. This prevents the centrifugal impeller 12 and the cooling impeller from rotating relative to the output shaft 111, effectively ensuring that the rotation of the output shaft 111 drives the centrifugal impeller 12 and the cooling impeller to rotate synchronously. The cross-section of the output shaft 111 is preferably a D-shaped cross-section, which makes the output shaft 111 easy to process and ensures its structural strength.

[0055] A bushing 15 is fitted onto the output shaft 111, sandwiching the centrifugal impeller 12 and the axial impeller 13. This facilitates the positioning and limiting of the centrifugal impeller 12 and the axial impeller 13 on the output shaft 111, ensuring the installation stability of the output shaft 111. Simultaneously, the bushing 15 also improves the structural strength and rigidity of the entire output shaft 111, preventing breakage or other risks due to the length of the output shaft 111. Furthermore, the output shaft 111 is provided with a first limiting structure 16 and a second limiting structure 17. The centrifugal impeller 12 is sandwiched between the first limiting structure 16 and the bushing 15, and the axial impeller 13 is sandwiched between the second limiting structure 17 and the bushing 15.

[0056] In this embodiment, the first limiting structure 16 includes a limiting retaining ring 161 that is engaged with the output shaft 111. Specifically, the output shaft 111 is provided with an annular groove, and the limiting retaining ring 161 is engaged in the groove, thereby facilitating the assembly and disassembly of the limiting retaining ring 161. The limiting retaining ring 161 has a side opening, and the output shaft 111 is engaged into the limiting retaining ring 161 through the side opening.

[0057] The first limiting structure 16 also includes a stop washer 162 sleeved on the output shaft 111. The stop washer 162 is sandwiched between the centrifugal impeller 12 and the limiting retaining ring 161 to increase the contact area between the first limiting structure 16 and the centrifugal impeller 12, thereby increasing the installation stability and reliability of the centrifugal impeller 12 on the output shaft 111. A stop washer 162 is also sandwiched between the bushing 15 and the centrifugal impeller 12 to improve the axial stopping effect on the centrifugal impeller 12 while reducing the outer diameter of the main structure of the bushing 15.

[0058] In this embodiment, the centrifugal impeller 12 includes a mounting disk portion 121 and an impeller disk portion 122 coaxially connected to the outer periphery of the mounting disk portion 121. Multiple blades are sequentially arranged on the impeller disk portion 122 along the circumference of the mounting disk portion 121. A first shaft hole 124 is provided on the mounting disk portion 121, through which the output shaft 111 passes. The mounting disk portion 121 is sandwiched between the bushing 15 and the first limiting structure 16. It is worth noting that the blade structure can be designed with reference to existing structures; this is not the focus of this utility model and will not be elaborated upon here.

[0059] At least one side of the mounting plate 121 has a boss 123 protruding along the axial direction of the output shaft 111. The first shaft hole 124 passes through the boss 123. This allows for a reduction in the overall thickness of the mounting plate 121 to decrease weight, while maintaining the overall structural strength and rigidity of the centrifugal impeller 12 at the first shaft hole 124, thereby improving the service life of the centrifugal impeller 12 and the fan assembly 1. In this embodiment, bosses 123 protrude from opposite sides of the mounting plate 121, and the two bosses 123 abut against the stop pads 162 on both sides.

[0060] Furthermore, a central recess 1211 is formed in the center of the mounting plate 121 along the direction toward the motor housing 112 of the drive motor 11, and the first shaft hole 124 is formed in the central recess 1211. By providing the central recess 1211, the overall structural strength and rigidity of the mounting plate 121 can be further enhanced, the probability of deformation of the mounting plate 121 can be reduced, and the safety and reliability of the centrifugal impeller 12 can be improved.

[0061] To reduce the weight of the centrifugal impeller 12, the mounting plate portion 121 is provided with weight-reducing holes 1212, and preferably, multiple weight-reducing holes 1212 are provided at intervals along the circumference of the mounting plate portion 121. Furthermore, the weight-reducing holes 1212 are located between the central recess 1211 and the impeller plate portion 122.

[0062] The output shaft 111 has a threaded section at the end away from the motor housing 112. The second limiting structure 17 includes a locking nut 171, which is screwed onto the threaded section. The axial flow impeller 13 is axially limited between the bushing 15 and the locking nut 171. By providing the locking nut 171, it is convenient to assemble and disassemble the second limiting structure 17 on the output shaft 111, thereby facilitating the assembly and disassembly of the axial flow impeller 13 on the output shaft 111, improving the ease of assembly and disassembly of the axial flow impeller 13, and enhancing the stability and reliability of the second limiting structure 17 on the output shaft 111.

[0063] Furthermore, the second limiting structure 17 also includes a locking washer 172, which is sandwiched between the axial impeller 13 and the locking nut 171. The outer diameter of the locking washer 172 is larger than that of the locking nut 171, thereby increasing the contact area between the second limiting structure 17 and the axial impeller 13 and reducing the problem of axial blades being squeezed and worn due to direct contact between the locking nut 171 and the axial impeller 13, thus ensuring the installation stability and reliability of the locking nut 171. The second limiting structure 17 also includes a washer 173 located between the locking washer 172 and the locking nut 171, which is sleeved on the output shaft 111.

[0064] In this embodiment, the axial flow impeller 13 includes a central disk portion 131 and a plurality of fan blades 132 arranged circumferentially around the central disk portion 131. A second shaft hole 1311 is provided on the central disk portion 131. The central disk portion 131 is recessed in the direction toward the centrifugal impeller 12 to form a concave disk portion 1312. The locking gasket 172 abuts against the bottom of the concave disk portion 1312, thereby enhancing the structural strength and rigidity of the central disk portion 131 and improving the service life of the axial flow impeller 13.

[0065] Exemplarily, the fan blade 132 includes a first blade portion 1321 and a second blade portion 1322 connected at an included angle. The first blade portion 1321 is generally perpendicular to the axial direction of the output shaft 111 and one end is connected to the central disk portion 131. The second blade portion 1322 is connected to one side edge of the first blade portion 1321 and is located on the side of the first blade portion 1321 away from the centrifugal impeller 12. This enhances the agitation effect of the fan blade 132 on the airflow. However, it is understood that the specific structure of the fan blade 132 can refer to the structure of the fan blade 132 in the existing axial flow impeller 13. This is not the focus of this utility model, and this utility model does not limit or elaborate on it.

[0066] Furthermore, the bushing 15 includes a main sleeve portion 151, and flange portions 152 protrude radially outward from both ends of the main sleeve portion 151. The flange portions 152 and the end faces of the corresponding ends of the main sleeve portion 151 are in corresponding structural contact to increase the contact area between the main sleeve portion 151 and the axial flow impeller 13 and the stop washer 162, thereby improving the limiting effect.

[0067] like Figure 2 , Figure 6 and Figure 7 As shown, the fan cover 14 includes a top plate portion 141 and a side plate portion 142 connected to the edge of the top plate portion 141. The side plate portion 142 and the top plate portion 141 together form a heat dissipation air cavity with one side open. The top plate portion 141 has an air inlet 1411, and the side plate portion 142 has two ends in the circumferential direction, with an air outlet formed between the two ends of the side plate portion 142. This type of fan cover 14 has a simple structure and is easy to manufacture.

[0068] In this embodiment, the motor housing 112 passes through the air inlet 1411 and partially extends out of the fan cover 14, which facilitates the heat dissipation of the drive motor 11 and ensures the operational stability and reliability of the drive motor 11.

[0069] To improve the mounting efficiency of the drive motor 11 on the fan cover 14, the fan cover 14 has a motor mounting portion 143 located at the air inlet 1411. The motor mounting portion 143 has a mounting through hole directly opposite the air inlet 1411, and in the axial direction of the output shaft 111, the mounting through hole is located on the side of the air inlet 1411 away from the axial flow impeller 13. The motor mounting portion 143 also has vent holes communicating with the air inlet 1411, and the vent holes are spaced apart on the outer side of the mounting through hole. This arrangement of the motor mounting portion 143 reduces the space occupied by the drive motor 11 in the heat dissipation cavity, thereby reducing the axial dimension of the fan cover 14 on the output shaft 111. At the same time, it allows the motor housing 112 to be partially exposed outside the fan cover 14, thus facilitating heat dissipation of the drive motor 11.

[0070] In this embodiment, the motor mounting portion 143 includes a mounting ring portion 1431 spaced apart on the outside of the air inlet 1411 and a connecting arm portion 1432 connecting the mounting ring portion 1431 and the edge of the air inlet 1411. Multiple connecting arms 1432 are spaced apart along the axial direction of the air inlet 1411. The edge of the air inlet 1411, the mounting ring portion 1431, and two adjacent connecting arms 1432 together form a vent hole. The inner hole of the mounting ring portion 1431 forms a mounting through hole. The motor housing 112 is connected to the mounting ring portion 1431. This arrangement helps ensure the installation stability of the drive motor 11 and facilitates the formation of the vent hole.

[0071] Furthermore, the connecting arm 1432 includes a first arm and a second arm that are vertically connected. The first arm extends radially along the mounting ring 1431, and the second arm extends axially along the mounting ring 1431 and is connected to the top plate 141. The motor mounting part 143 is preferably integrally formed with the top plate, but it can also be welded together.

[0072] In this embodiment, the motor housing 112 of the drive motor 11 extends radially outward from the end away from the axial impeller 13, and a plurality of mounting ears 113 are arranged at intervals along the circumference of the motor housing 112. The mounting ears 113 are detachably connected to the fan cover 14, thereby facilitating the installation of the drive motor 11. Specifically, the mounting ears 113 are connected to the mounting ring portion 1431 or to the connection between the mounting ring portion 1431 and the first arm portion. The mounting ears 113 include a transition portion 1132 and an ear plate portion 1131 connected at an included angle. The first end of the transition portion 1132 is connected to the motor housing 112, and the second end of the transition portion 1132 extends in the direction toward the centrifugal impeller 12 and is connected to the ear plate portion 1131. The ear plate portion 1131 extends radially outward from the motor housing 112.

[0073] To facilitate the installation of the fan assembly 1, the steam condensing device 100 also includes a duct assembly 2. The duct assembly 2 is installed on the outside of the inner liner 200 and forms a hot air chamber with the inner liner 200. The fan cover 14 is installed on the side of the duct assembly 2 away from the hot air chamber. The output shaft 111 passes through the duct assembly 2, and the condensing assembly 3 is installed on the duct assembly 2. This allows the duct assembly 2 to separate the heat dissipation chamber and the hot air chamber, while also allowing both the fan assembly 1 and the condensing assembly 3 to be installed on the duct assembly 2. This facilitates the modular design of the steam condensing device 100 and the overall assembly and disassembly of the steam condensing device 100. Specifically, a recessed cavity 221 is formed on the side of the duct assembly 2 away from the air inlet 1411. The cavity wall of the recessed cavity 221 and the outer wall of the inner liner 200 together form the hot air chamber.

[0074] The air duct assembly 2 has a partition cavity 23 inside. The heat dissipation air cavity, the partition cavity 23, and the hot air cavity are sequentially separated along the axial direction of the output shaft 111. The output shaft 111 passes through the partition cavity 23, thereby reducing the transfer of heat from the hot air cavity to the heat dissipation air cavity. Furthermore, a shaft through hole is formed on the side wall of the partition cavity 23 away from the heat dissipation air cavity. The output shaft 111 passes through the shaft through hole, and there is a sealing structure between the hole wall of the shaft through hole and the output shaft 111 to further prevent the transfer of heat from the hot air cavity to the heat dissipation air cavity.

[0075] Furthermore, such as Figure 1 and Figure 2 As shown, the air duct assembly 2 includes a detachably connected outer air duct plate 21 and an inner air duct plate 22. The inner air duct plate 22 cooperates with the inner liner 200 to form a hot air cavity. The fan cover 14 and the condenser assembly 3 are installed on the outer air duct plate 21. Specifically, the edge of the cover side plate portion 142 of the fan cover 14 extends outward to form a fixing plate portion 144. The fixing plate portion 144 fits against the outer air duct plate 21 and is detachably connected, so that the outer air duct plate 21 blocks the opening of the heat dissipation air cavity.

[0076] In this embodiment, the sealing structure includes a sealing ring 4, which is installed at the edge of the opening in the shaft through hole so that the rotation of the output shaft 111 will not cause the sealing structure to rotate, and the sealing ring 4 is rotatably engaged with the shaft sleeve 15. In other embodiments, the sealing structure may include a sealing sleeve fitted on the shaft sleeve 15, which is rotatably fitted with the hole wall of the shaft through hole.

[0077] The air duct assembly 2 includes a detachably connected inner air duct plate 22 and an outer air duct plate 21. The inner air duct plate 22 and the outer air duct plate 21 together form a partition cavity 23. The fan cover 14 is installed on the outer air duct plate 21, and the inner air duct plate 22 and the inner liner 200 together form a hot air cavity. The inner air duct plate 22 and / or the outer air duct plate 21 are detachably connected to the casing. Preferably, the heating element 500 is installed on the inner air duct plate 22 and arranged around the axial flow impeller 13.

[0078] It is worth noting that in this embodiment, the steam condensation device 100 is installed on the rear side of the inner liner 200, that is, the rear sidewall of the inner liner 200 is provided with several airflow holes, so as to ensure sufficient installation space between the inner liner 200 and the casing while reducing the size of the cooking device in the left-right direction. In other embodiments, the steam condensation device 100 may also be installed on one side of the inner liner 200 in the left-right direction.

[0079] In this embodiment, the condenser assembly 3 includes a radiator 31 and a condenser tube 32. The radiator 31 includes multiple heat dissipation fins arranged at intervals along the axial direction of the output shaft 111. A vertically penetrating ventilation channel is formed between two adjacent heat dissipation fins, and the ventilation channel is directly connected to the air outlet. The radiator 31 is mounted on the fan cover 14. The condenser tube 32 includes multiple condensing sections that are bent and connected sequentially from top to bottom. Two adjacent condensing sections are connected by a bent section, so that the condenser tube 32 as a whole forms a serpentine bend structure. Each condensing section passes through the heat dissipation fins, and a steam inlet is formed at the upper end of the condensing section, which is connected to the cooking cavity. Further, the condenser tube 32 also includes a bent section connected between two adjacent condensing sections, and the bent section is located on the outside of the radiator 31.

[0080] The above arrangement ensures that the direction of the heat dissipation fins of the radiator 31 is the same as the axial direction of the output shaft 111, which facilitates the connection between the air outlet and the ventilation channel, and also helps to further reduce the size of the condenser assembly 3 in the axial direction of the output shaft 111, thereby improving the overall structural compactness of the steam condensation device 100. At the same time, since the condenser tube 32 is bent from top to bottom, the condensate formed by the condensation of hot steam in the condenser tube 32 can drip downwards under the action of gravity, which facilitates the discharge and recycling of condensate and also avoids the accumulation of condensate in the condenser tube 32.

[0081] To further improve the condensation effect of the condenser assembly 3, at least two condenser tubes 32 are arranged side by side along the width of the radiator 31. Both condenser tubes 32 are connected to the cooking cavity, thereby reducing the amount of steam in a single condenser tube 32 and improving the condensation effect of steam. The number of condenser tubes 32 can be one, two, or three. The vertical dimension of the air outlet is approximately equal to the vertical dimension of the radiator 31, so that the cooling airflow from the air outlet can pass through the radiator 31, ensuring the heat dissipation effect of the radiator 31.

[0082] To collect condensate, a water collection box 5 is installed below the condenser assembly 3. The water collection box 5 contains a water collection chamber, and the lower end of the condensation channel is connected to the water collection chamber. Thus, the condensate formed in the condenser tube 32 flows along the condenser tube 32 to the water collection chamber under the action of gravity, realizing the recovery and cleaning of condensate.

[0083] Furthermore, the lower end of the condenser tube 32 is inserted into the water collection box 5 to ensure that the water in the condenser tube 32 can flow smoothly into the water collection box 5. The upper end of the water collection box 5 is provided with an overflow port, so that the gas entering the water collection box 5 with the condenser tube 32 can overflow outward through the overflow port, avoiding excessive gas pressure in the water collection box 5 and affecting the safety of use.

[0084] In this embodiment, the steam supply assembly includes a steam generator and a water tank 300. The water tank 300 is provided with a separate water supply chamber and a wastewater chamber. The water supply chamber is used to supply water to the steam generator. The water collection box 5 is connected to the wastewater chamber through a drain pipe 6, so as to collect and clean condensate without disassembling the water collection box 5. The configuration of the water tank 300 and the steam generator can refer to the prior art, and will not be limited or described in detail here.

[0085] In this embodiment, the steam supply assembly includes a steam generator and a water tank 300. The water tank 300 is provided with a separate water supply chamber and a wastewater chamber. The water supply chamber is used to supply water to the steam generator. The water collection box 5 is connected to the wastewater chamber through a drain pipe 6, so as to collect and clean condensate without disassembling the water collection box 5. The configuration of the water tank 300 and the steam generator can refer to the prior art, and will not be limited or described in detail here.

[0086] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A fan assembly comprising: The fan cover (14) has an air inlet (1411), a heat dissipation air cavity (22) and an air outlet which are communicated in sequence, the driving motor (11) is installed on the fan cover (14); The centrifugal impeller (12) and the axial flow impeller (13) are coaxially and spacedly installed on the output shaft (111) of the driving motor (11), the centrifugal impeller (12) is located in the heat dissipation air cavity (22), the air outlet is located on the radial side of the centrifugal impeller (12), and the axial flow impeller (13) is located outside the fan cover (14) away from the air inlet (1411).

2. The fan assembly of claim 1, wherein, The cross section of the output shaft (111) is a non-circular cross section, the center of the centrifugal impeller (12) has a first shaft hole (124), the center of the axial flow impeller (13) has a second shaft hole, the shapes of the first shaft hole (124) and the second shaft hole are the same as the cross section shape of the output shaft (111), and the output shaft (111) passes through the first shaft hole (124) and the second shaft hole in sequence. And / or, the output shaft (111) is sleeved with a shaft sleeve (15), and the shaft sleeve (15) is clamped between the centrifugal impeller (12) and the axial flow impeller (13).

3. The fan assembly of claim 2, wherein, The shaft sleeve (15) is made of heat insulation material; And / or, one end of the output shaft (111) away from the motor shell (112) has a threaded section, the threaded section is screwed with a locking nut (172), and the axial flow impeller (13) is limited between the shaft sleeve (15) and the locking nut (172).

4. The fan assembly of any one of claims 1-3, wherein, The centrifugal impeller (12) comprises a mounting disc portion (121) and an impeller disc portion (122) coaxially connected to the outer periphery of the mounting disc portion (121), the impeller disc portion (122) has a plurality of blades arranged in sequence along the circumference of the mounting disc portion (121), the center of the mounting disc portion (121) is provided with a first shaft hole (124), and the output shaft (111) passes through the first shaft hole (124); The mounting disc portion (121) is provided with a lightening hole (1212), and / or at least one side of the mounting disc portion (121) protrudes a boss portion (123) in the axial direction of the output shaft (111), and the first shaft hole (124) penetrates through the boss portion (123).

5. The fan assembly of claim 4, wherein, The center of the mounting disc portion (121) is recessed to form a central recess (1211) in the direction towards the air inlet (1411), and the boss portion (123) is protruded on the opposite sides of the central recess (1211). And / or, the center of the mounting disc part (121) is recessed to form a central recess (1211) in a direction towards the air inlet (1411), the first shaft hole (124) is arranged at the center of the central recess (1211), and the weight-reducing holes (1212) are arranged at intervals in the circumferential direction of the central recess (1211).

6. The fan assembly of any one of claims 1-3, wherein, The motor shell (112) of the driving motor (11) extends radially outward from one end away from the axial impeller (13), and the mounting lug (113) is arranged at intervals in the circumferential direction of the motor shell (112) and is detachably connected with the fan cover (14). And / or, the motor shell (112) penetrates the air inlet (1411) and is located outside the fan cover (14) away from the output shaft (111).

7. The fan assembly of claim 6, wherein, The mounting lug (113) comprises an adapter part (1132) and an ear plate part (1131) connected at an angle, the first end of the adapter part (1132) is connected to the motor shell (112), the second end of the adapter part (1132) extends in a direction towards the centrifugal impeller (12) and is connected with the ear plate part (1131), and the ear plate part (1131) extends radially outward from the motor shell (112). And / or, the fan cover (14) has a mounting ring part (41) coaxially arranged with the air inlet (1411) and a connecting arm part (1432) connected between the mounting ring part (41) and the edge of the air inlet (1411), in the axial direction of the output shaft (111), the mounting ring part (41) is arranged at intervals on the side of the air inlet (1411) away from the centrifugal impeller (12), the connecting arm part (1432) is arranged at intervals in the circumferential direction of the mounting ring part (41), the motor shell (112) penetrates the mounting ring part (41), and the mounting lug (113) is connected with the mounting ring part (41).

8. A steam condensing device, characterized by Comprise: The fan assembly according to any one of claims 1-7; The condensing assembly (3) is arranged at the air outlet, and the condensing assembly (3) has a condensing channel for passing steam, and the centrifugal impeller (12) guides external cooling airflow to flow through the air inlet (1411), the heat dissipation air chamber (22) and the air outlet in sequence to the condensing assembly (3).

9. The steam condensing device of claim 8, wherein, The steam condensing device further comprises an air duct assembly (2) for forming a hot air chamber together with the inner container (200), the fan cover (14) is mounted on one side of the air duct assembly (2), the output shaft (111) penetrates the air duct assembly (2), and the axial impeller (13) is located on the other side of the air duct assembly (2) to be located in the hot air chamber.

10. The steam condensing device of claim 9, wherein, The air duct assembly (2) has a partition chamber (23), and in the axial direction of the output shaft (111), the heat dissipation air chamber (22), the partition chamber (23) and the hot air chamber are arranged in sequence.

11. A cooking apparatus comprising an electric heating element (500) and an inner vessel (200) having a cooking cavity, characterized in that, The steam condensing device as claimed in any one of claims 8-10 is installed outside the inner container (200) and forms a hot air cavity together with the inner container (200), the fan cover (14) is located at a side of the hot air cavity away from the inner container (200), the cooking cavity is provided with a plurality of air flow holes in communication with the hot air cavity, and the axial flow impeller (13) is installed in the hot air cavity.

Images