CN220369966U - Air duct heating device and dish washer - Google Patents

Abstract

The utility model provides an air duct heating device which is arranged on an air duct of a dish washer and comprises a protective cover, a heating module arranged in the protective cover and a fixing piece, wherein the heating module is arranged in the protective cover through the fixing piece, and a certain gap exists between a shell of the heating module and the protective cover. The shell of the heating module is connected with the protective cover by the fixing piece, a circle of gap is formed between the heating module and the protective cover, the circle of gap is used for preventing the shell of the heating module from being directly connected with the protective cover to cause the contact between the shell of the heating module and other components, potential safety hazards are easily caused by combustion, and meanwhile, the overflow of heat generated by the heating module is reduced, so that the energy loss caused by the overflow of the heat is reduced, and the problem of heating high-speed wind can be solved. The utility model also provides a dish washer provided with the air duct heating device.

Description

Air duct heating device and dish washer

Technical Field

The utility model belongs to the technical field of kitchen appliances, and particularly relates to an air duct heating device and a dish washer provided with the air duct heating device.

Background

Along with the improvement of living standard, the requirements of people on living quality are higher and higher, so that the requirements on various aspects such as quality, performance, humanization of use, intellectualization of operation and the like of products are also higher and higher. The dish washer is also gradually put into the life of people as an excellent product, and is a device for automatically cleaning dishes such as bowls, chopsticks, plates, dishes, knives, forks and the like, so that the life of people is greatly facilitated. The dish washing machine usually needs to dry the dishes after washing, in the existing dish washing machine, one part is not connected with an external drying system, and the water drops on the dishes are evaporated by the heat of the dishes, so that the dishes are dried, but the drying effect is poor; other dish washers rely on external drying systems, and an air duct component communicated with the inner container is arranged on the outer side of the inner container, so that hot air is blown into the inner container through the external air duct component to accelerate the flow of air in the dish washer in a drying stage of the dish washer, water vapor is taken away, and the drying of tableware is accelerated.

In the prior art, the heating module is usually directly installed inside the air duct, and the shell of the heating module contacts with other components, so that potential safety hazards are caused, and meanwhile, heat generated by the heating module overflows, so that energy loss is caused.

Obviously, increasing the diameter of the wind wheel of the fan and increasing the rotating speed of the fan can greatly improve the heating efficiency of the dish-washing machine, but the size of the impeller is limited by the structural size of the dish-washing machine, and the possibility of increasing the size of the impeller in the design of the dish-washing machine is almost avoided.

The ducted fan has the characteristics of high rotating speed and high air quantity, even if noise of the ducted fan is not considered, the ducted fan is assembled to the existing dish washing machine, the power of the heating module is difficult to heat the high-speed air, the power of the heating module is increased, and the high temperature can damage the air duct and even the dish washing machine.

The present utility model has been made in view of this.

Disclosure of Invention

The utility model provides an air duct heating device, which is characterized in that a heating module and a protective cover are connected through a fixing piece, a certain gap exists between the protective cover and a heating module shell, the potential safety hazard caused by the fact that the heating module is directly connected with the protective cover in the prior art is solved, meanwhile, the problem of energy loss caused by the fact that heat generated by the heating module overflows is solved, and the problem of heating high-speed wind is also solved.

In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that:

an air duct heater device is arranged on an air duct of a dish washer and comprises a protective cover and a heating module arranged in the protective cover, and further comprises a fixing piece, wherein the heating module is arranged in the protective cover through the fixing piece, and a certain gap exists between a shell of the heating module and the protective cover.

In the scheme, a certain gap exists between the shell of the heating module and the protective cover, so that the protective cover is prevented from being scalded due to overhigh temperature.

Further, the fixing member includes:

a first connecting part embedded at the end part of the protective cover;

the second connecting part is arranged on the first connecting part, is distant from the edge of the first connecting part and the ventilation cavity and is used for connecting the end part of the shell.

Further, the first connecting portion includes:

a first portion disposed on a side close to the housing, the radial cross section being rectangular;

the second part is arranged at one side far away from the shell, and the radial section of the second part is a trapezoid with two waists slightly protruding outwards;

the peripheral surface of the first connecting portion and the end surface of the first connecting portion, which is far away from the housing, form a contact wall.

Further, the method comprises the steps of,

the protective cover includes:

the extension part extends from the end surface of the first connecting part, which is close to the second connecting part, along the axial direction and extends towards the direction away from the first connecting part, and the length of the extension part is greater than or equal to the length of the shell;

a connecting end portion extending from an end face of the first connecting portion, which is close to the second connecting portion, in an axial direction in a direction opposite to an extending direction of the extending portion, the extending portion being curved in a direction facing the central axis of the housing;

preferably, the inner wall of the connecting end portion is fitted to the contact wall of the first connecting portion.

Further, the connecting end part is provided with a limit rib, and the limit rib is a protrusion which extends up and down and is perpendicular to the inner surface of the connecting end part, which is close to one side of the air supply device; and a limiting groove corresponding to the limiting rib is arranged on the first connecting part.

Further, a convex rib extending inwards along the radial direction is arranged in the protective cover, and the convex rib is attached to one side, close to the shell, of the first connecting part; the height of the inner edge of the convex rib is smaller than the width of the gap.

Further, the second connecting part protrudes and extends to the inside of the protective cover, and the periphery of the second connecting part is arranged at intervals with the edge of the first connecting part; the end part of the shell is sleeved on the second connecting part and is abutted with the first connecting part.

Further, the second connection portion housing is fixed by a clamping structure, the clamping structure includes:

the clamping protrusions are arranged on the second connecting part and comprise a plurality of clamping protrusions uniformly arranged along the circumferential direction of the second connecting part;

the bayonet is arranged on the shell and comprises a plurality of clamping bulges which are in one-to-one correspondence with the second connecting parts.

Further, the second connecting portion is a groove formed in one face, close to the shell, of the first connecting portion, the shape of the groove corresponds to that of the shell after self-locking installation, the outer surface of the shell is attached to the inner surface of the second connecting portion, and the second connecting portion is connected through a clamping structure.

The utility model also provides a dish washer provided with the air duct heater device.

After the technical scheme is adopted, compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the heating body and the protective cover are connected together by the fixing piece, so that a circle of gap is formed between the heating body and the protective cover, thereby avoiding potential safety hazards caused by the fact that the shell of the heating module is in contact with other components due to the fact that the heating module is directly connected with the protective cover, and simultaneously reducing energy loss caused by the fact that heat generated by the heating module overflows.

2. According to the utility model, the assembly of the air duct assembly can be realized only by the way of splicing, clamping and the like through arranging all parts of the main body, and screws are not required in the whole assembly process, so that the assembly efficiency is improved. Meanwhile, the protruding part of the fixing piece is inserted into the corresponding groove of the shell in the self-locking installation process of the shell, so that the connection between the shell and the fixing piece is realized, the overall stability of the shell is enhanced, and the vibration is reduced, so that the noise reduction effect is achieved.

3. According to the utility model, the high-speed wind blown by the ducted fan can be effectively heated by the high-power heating module, so that the phenomenon that the high-speed wind is blown to the liner without being effectively heated when the power of the heating module is low is avoided.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:

FIG. 1 is a schematic diagram of the overall heating module in an embodiment of the present utility model;

FIG. 2 is a schematic view of a fixing member according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram illustrating an assembly structure of a heating module and a fixing member according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a fixing member according to a second embodiment;

FIG. 5 is a schematic view of a fixing member according to a third embodiment;

FIG. 6 is a schematic view of another angle of the fixing member according to the embodiment of the present utility model;

FIG. 7 is a schematic diagram showing an assembly structure of a protection cover and an air supply device in the present utility model;

fig. 8 is a schematic diagram illustrating an assembly structure of a heating module and a flow guiding portion in a fourth embodiment;

fig. 9 is a schematic diagram of a duct component in the fourth embodiment.

The main elements in the figure are illustrated:

1. an air supply device; 11. a ducted fan; 2. a fixing member; 21. a first connection portion; 211. a first portion; 212. a second portion; 213. a contact wall; 215. a limit groove; 22. a second connecting portion; 221. the clamping bulge; 26. a groove; 3. a heating module; 31. a support; 32. a housing; 327. a self-locking structure; 326. a bayonet; 4. a flow guiding part; 41. a front tuyere; 42. a rear tuyere; 43. the upper wall of the flow guiding part; 44. a lower wall of the flow guiding part; 45. a sidewall; 46. a cambered surface; 5. an air duct; 51. an air supply duct; 512. an air inlet; 513. a bayonet of an air supply duct; 514. a mounting port; 5221. an air outlet; 7. a protective cover; 71. an air inlet end; 72. an air outlet end; 73. a protective cover bulge; 74. convex ribs; 741. a connecting end; 742. an extension; 75. a void; 7611. a limit rib; 78. the upper wall of the protective cover.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model, but are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1 to 3, 6 and 7, in the embodiment of the present utility model, a heating device for a dishwasher air duct is described, including a fixing member 2, a protecting cover 7 and a heating module 3, the heating module 3 is provided with a housing 32, the heating module is disposed inside the housing 32, the housing 32 is mounted in the protecting cover 7 through the fixing member 2, a certain gap 75 exists between the inner wall of the protecting cover 7 and the outer surface of the housing 32, on one hand, the protecting cover 7 is disposed to perform a heat insulation function, and heat loss of the heating module 3 is reduced; on the other hand, the bypass fan 11 is used as a wind power source, the heating module 3 with higher heating power is needed to heat the wind, and the existence of the gap 75 well avoids the damage of the high-power heating module 3 to the protective cover 7.

In the embodiment of the utility model, the protection cover 7 needs to be installed in the air supply device 1 and the heating module 3 to form a whole, a ventilation opening is reserved at the position where the air supply device 1 is connected with the heating module 3 by the protection cover 7, and meanwhile, a ventilation cavity (23) corresponding to the ventilation opening is also arranged on the fixing piece 2, so that the air blown from the ducted fan 11 is blown into the heating module 3 through the ventilation opening and the ventilation cavity (23) on the fixing piece 2.

Specifically, the ducted fan 11 is disposed in a protruding manner outside the air inlet end 71 of the protective cover 7, is coaxial with the heating module 3, and is fixed in the protective cover 7, and a ventilation cavity 23 is disposed in the middle of the fixing member 2 in order to allow air blown by the ducted fan 11 to enter the heating module 3.

Specifically, the ventilation area of the ventilation cavity 23 at least ensures that all the wind blown from the ducted fan 11 flows into the heating module 3 from the cavity, so that the situation that the high-speed wind is directly blown to the fixing piece 2 due to insufficient ventilation area of the ventilation cavity 23 is avoided, damage is caused to the fixing piece 2, and the service life of the fixing piece 2 is shortened.

Specifically, the protection cover 7 wraps the air supply device 1 and the heating module 3, so that outside moisture and dust are prevented from entering the protection cover 7, the influence of external factors on the operation of the heating module 3 and the air supply device 1 is avoided, and the service lives of the heating module 3 and the air supply device 1 are prolonged. In the utility model, the air supply device 1 adopts the duct fan 11, and the noise reduction module can be added on the part of the protection cover 7 where the duct fan 11 is arranged to overcome the noise of the duct fan 11.

Specifically, the protection cover 7 is not parallel to the ground, and the protection cover 7 is inclined upward from the air blowing device 1 toward the heating module 3.

Specifically, the protection cover 7 is arranged at the bottom of the dish washer, the protection cover 7 is obliquely arranged, so that the impact force of high-speed wind on each part can be reduced, hot wind is smoothly and upwards conveyed to the liner, wind resistance is reduced, and noise is reduced.

Specifically, the material of the protective cover 7 should be selected from a heat insulating material or a heat insulating material, and the protective cover 7 should have a certain strength.

Preferably, the material of the protecting cover 7 in the embodiment of the present utility model is plastic, the protecting cover 7 is used for fixing the ducted fan 11, the heating module 3 and the connecting air duct 5, and a material with high strength, shock resistance and corrosion resistance is needed to be used as the protecting cover 7, while the plastic has the advantages of light weight, low price, good chemical stability, shock resistance, corrosion resistance, high specific strength and the like, and becomes the preferred material of the protecting cover 7.

Preferably, the protective cover 7 can be provided with a heat-insulating interlayer or a heat-insulating layer is covered outside the protective cover 7, so that the heat-insulating effect is achieved on one hand; on the other hand, the heat dissipation of the heating module 3 is also reduced.

In the embodiment of the present utility model, the fixing member 2 includes two parts, a first connecting portion 21 and a second connecting portion 22, the first connecting portion 21 is used for connecting with the protection cover 7, the second connecting portion 22 is used for connecting with the housing 32 and is embedded in one end of the protection cover 7 near the air supply device 1, the first connecting portion 21 and the second connecting portion 22 are arranged on one end of the first connecting portion 21 far away from the air supply device 1, and the first connecting portion 21 and the second connecting portion 22 are integrated.

Specifically, in order to provide a certain gap 75 between the housing 32 mounted in the protective cover 7 and the protective cover 7, the second connecting portion 22 is provided on the first connecting portion 21, the second connecting portion 22 is spaced from the edge of the first connecting portion 21, the end portion of the housing 32 is sleeved on the second connecting portion 22, one end of the housing 32 abuts against the end face of the first connecting portion 21 for supporting the housing 32, the other end is suspended to extend in the radial direction for a certain length, and in the extending direction of the length, the protective cover 7 extends coaxially with a certain gap substantially between the housing 32, and the heating module 3 is suspended in the middle of the protective cover 7.

In the embodiment of the present utility model, the first connecting portion 21 includes a first portion 211 and a second portion 212, the first portion 211 and the second portion 212 are sequentially disposed from the second connecting portion 22 toward the first connecting portion 21, and the first portion 211 and the second portion 212 are integrated.

Specifically, the four edges of the first portion 211 near one end of the housing 32 are provided with chamfers; the four edges of the first part 211, which are parallel to the axis of the first connecting part 21, are provided with arc chamfers which are matched with the shape of the inner surface of the protective cover 7; the radial cross section of the second portion 212 is an isosceles trapezoid, two waists of the trapezoid slightly protrude outwards, the radial cross section of the second portion 212 gradually decreases in the direction from the first portion 211 to the second portion 212, and the outer periphery of the second portion 212 is a curved surface curved towards the axis of the first connecting portion 21 in the direction from the first portion 211 to the second portion 212 as a whole.

Specifically, the protection cover 7 has an extension 742 that is coaxial with the housing 32, and extends from the first connection portion 21 toward the second connection portion 22 with a surface edge of the first connection portion 21 near the housing 32 as a starting point, to protect the entire heating module 3; a connection end 741 extending from the second connection portion 22 in the direction of the first connection portion 21 and curved in the direction of the central axis of the housing 32, starting from the edge of the first connection portion 21 near the housing 32, is coaxial with the housing 32.

Specifically, the peripheral surface of the first connecting portion 21 and the end surface of the first connecting portion 21 away from the housing 32 constitute a contact wall 213.

Specifically, the curved surface of the second portion 212, the upper bottom portion having a trapezoidal cross section, forms a contact wall 213 with the inner surface of the protective cover 7 together with the surface of the first portion 211 having a short side in cross section.

Specifically, the inner wall of the connection end portion 741 is fitted to the contact wall 213 of the first connection portion 21.

Specifically, the position that contacts with the tip of the protection cover 7 is provided with an arc-shaped structure, firstly, in order to reduce the vibration generated during the operation of the ducted fan 11, thereby reducing noise, if the ducted fan 11 is designed to be square, the fixing piece 2 and the protection cover 7 can be moved during the operation of the ducted fan 11, and the noise is increased.

Preferably, the material of mounting 2 can select ceramic material, and mounting 2 needs to contact with heating module 3, and the heat that heating module 3 produced is very easy to be conducted to other places, and ceramic material has fine thermal-insulated effect, and ceramic material's intensity is very high simultaneously, has reduced the broken condition in mounting 2 junction that leads to through vibrations for a long time in the course of the work, has reduced the potential safety hazard.

In this embodiment of the present utility model, the end portion of the protection cover 7 is provided with a connection end portion 741 extending along the circumferential direction and coaxially arranged with the protection cover 7, the connection end portion 741 corresponds to the size and shape of the first connection portion 21, the first connection portion 21 is installed in the connection end portion 741, and the contact wall 213 of the first connection portion 21 is attached to the inner surface of the connection end portion 741.

Specifically, the protection cover 7 is divided into an upper part and a lower part, the protection cover 7 is connected through a clamping structure arranged at the edge of the two parts, and the fixing piece 2 connected with the shell 32 is placed in the connecting end 741 in the protection cover 7 in the process of connecting the upper protection cover 7 and the lower protection cover 7, so that the installation connection between the protection cover 7 and the fixing piece 2 is realized.

Specifically, the connection end 741 is provided with a limit rib 7611, and the limit rib 7611 is a protrusion extending up and down perpendicular to the inner surface of the connection end 741 near one side of the air supply device 1; the first connecting portion 21 is provided with a limit groove 215 corresponding to the limit rib 7611.

Specifically, the fixing member 2 and the protective cover 7 are provided with the wire outlet structure, and the limit bar 7611 can enable the wire outlet structure on the fixing member 2 to keep corresponding to the wire outlet structure of the protective cover 7 by limiting the position of the fixing member 2 and preventing the fixing member 2 from moving.

Specifically, be provided with protruding muscle 74 in the safety cover 7, protruding muscle 74 contracts the setting inwards along the radial cross-section of safety cover 7, laminating with one side that first connecting portion 21 is close to shell 32, the chamfer that first portion 211 set up is in order to be convenient for with protruding muscle 74 card outside first connecting portion 21 when mounting 2 and protruding muscle 74 joint, if do not set up the chamfer, can lead to the card to appear blocking in-process, the insecure of card, protruding muscle 74 contracts inwards highly will be less than the distance between safety cover 7 to shell 32, protruding muscle 74 does not contact with shell 32, prevent that the heat on the shell 32 from causing the destruction to the safety cover 7 of plastics material when heating module 3 during operation, thereby the potential safety hazard has been reduced.

In the embodiment of the utility model, the second connecting portion 22 protrudes from the middle of the first connecting portion 21 to the other side of the end portion of the protective cover 7, and is used for supporting the housing 32, one end of the housing 32 is sleeved on the second connecting portion 22, and abuts against the first connecting portion 21, and the second connecting portion 22 and the housing 32 are connected through a fastening structure.

Specifically, the clamping structure includes a clamping protrusion 221 disposed on one of the housing 32 and the second connecting portion 22, and a bayonet 326 disposed on the other of the housing 32 and the second connecting portion 22, where the bayonet 326 is sleeved on the clamping protrusion 221, so as to connect the housing 32 of the heating module 3 and the fixing member 2.

Specifically, in some possible embodiments, the bayonet 326 is configured as a groove recessed inward from the peripheral wall of the second connecting portion 22, and the engaging protrusions 221 are configured as protrusions corresponding to the above-described recessed groove one by one sequentially arranged from the peripheral wall of the inner surface of the housing 32.

Preferably, the outer peripheral wall of the second connecting portion 22 is provided with a locking protrusion 221, and the side wall of the housing 32 is provided with a bayonet 326, which is adapted to the locking protrusion 221 provided in the second connecting portion 22.

Specifically, the metal plate material is selected as the manufacturing material of the casing 32, the casing 32 is a whole sheet metal part which is bent to form a part with the same shape as the peripheral surface of the second connecting part 22, a self-locking structure 327 of a claw and a buckle is arranged on one side of the casing 32 for self-locking installation, and bayonets 326 are arranged on two opposite sides of the peripheral wall of the casing 32 for fixing the supporting part 31 for winding the heating wire.

Specifically, the clamping protrusion 221 of the second connecting portion 22 is a square block formed by a plane extending perpendicularly to the plane and respectively arranged on each surface of the second connecting portion 22, and a chamfer is arranged at the end of the square block, so that when the housing 32 is connected with the second connecting portion 22, the housing 32 can be conveniently clamped in a self-locking process, and the situation that the top of the square block and the clamping opening 326 are blocked when the clamping opening 326 is clamped with the clamping protrusion 221 at a certain angle in the self-locking process is avoided.

Specifically, the plurality of engaging protrusions 221 are uniformly arranged along the circumferential direction of the second connecting portion 22, and the bayonet 326 on the housing 32 is in one-to-one correspondence with the plurality of engaging protrusions 221 of the second connecting portion 22.

Specifically, during the self-locking installation of the housing 32, the clamping protrusions 221 of the fixing member 2 are inserted into corresponding bayonets 326 of the housing 32, so as to realize the connection between the housing 32 and the fixing member 2.

Preferably, the engaging protrusion 211 may be provided such that a side close to the first connecting portion 21 is provided as a straight surface perpendicular to the axial center of the second connecting portion 22, and an inclined surface is provided away from the first connecting portion 21 so as to be inclined from the end portion to the root portion in a direction away from the first connecting portion 21.

Preferably, after the self-locking installation of the shell 32 is completed, the whole heating module 3 is sleeved on the fixing piece 2, so that the heating module 3 is connected with the fixing piece 2, and the surface, away from the first connecting portion 21, of the clamping protrusion 221 is an inclined surface, so that the installation is facilitated.

Example two

As shown in fig. 4, in the embodiment of the present utility model, a groove matched with the housing 32 after the automatic lock is installed is provided on one side of the first connecting portion 21 away from the ducted fan 11, and the groove wall is attached to the outer surface of the housing 32, and the groove is the second connecting portion 22.

Specifically, in order to maintain the fixing effect unchanged, the first portion 211 of the first connecting portion 21 extends in a direction from the second portion 212 toward the first portion 211, leaving enough space for the groove of the second connecting portion 22 to be deep enough.

Specifically, the depth of the groove of the second connecting portion 22 determines the stability of the connection with the housing 32, and the depth of the groove is at least the same as the protruding height of the second connecting portion 22 in the first embodiment.

In the embodiment of the utility model, the groove wall of the groove part of the second connecting part 22 is attached to the outer surface of the shell 32 of the heating module 3, the end part of the shell 32 is abutted to the groove bottom of the groove, and the second connecting part 22 and the shell 32 are realized by arranging a clamping structure.

Specifically, the clamping structure includes a clamping protrusion 221 disposed on a groove wall of the groove of the second connecting portion 22, and a bayonet 326 disposed on the housing 32 and adapted to the clamping protrusion 221 disposed on the second connecting portion 22.

Preferably, the engaging protrusion 221 of the second connecting portion 22: setting one side close to the bottom of the groove as a straight surface perpendicular to the axis of the second connecting part 22; the side away from the bottom of the groove is provided as a slope inclined from the end portion to the root portion in a direction away from the bottom of the groove.

Specifically, the clamping protrusion 221 is provided with an inclined surface, and when the housing 32 is inserted into the second connecting portion 22, one end of the housing 32, which is close to the fixing member 2 and has a bayonet 326, has a transition deformation, so that the mounting can be more conveniently realized.

Specifically, the clamping protrusions 221 are uniformly arranged along the circumferential direction of the groove wall of the second connecting portion 22, and the bayonets 326 on the housing 32 are in one-to-one correspondence with the clamping protrusions 221 of the second connecting portion 22.

In the embodiment of the present utility model, the housing 32 is first self-locked and installed to form a size and shape corresponding to the second connecting portion 22, and then the housing 32 is inserted into the groove portion of the second connecting portion 22, and the connection between the fixing member 2 and the housing 32 is achieved through the cooperation of the clamping protrusion 221 and the bayonet 326.

In the embodiment of the present utility model, the protruding rib 74 provided in the protecting cover 7 is to be replaced correspondingly according to the extending length of the first portion 211, so that the protruding rib 74 can be clamped on the side of the first portion 211 of the first connecting portion 21 away from the second portion 212, thereby ensuring that the fixing element 2 is clamped in the protecting cover 7.

Example III

As shown in fig. 5, in the embodiment of the present utility model, the fixing member 2 includes two parts, a first connecting portion 21 and a second connecting portion 22, the first connecting portion 21 is used for connecting with the protection cover 7, the second connecting portion 22 is used for connecting with the housing 32 of the heating module 3 and is disposed at an end of the first connecting portion 21 far away from the air supply device 1, the second connecting portion 22 protrudes from the first connecting portion 21, and the first connecting portion 21 and the second connecting portion 22 are integrally formed.

Specifically, the first connecting portion 21 is provided with a groove 26 extending around the second connecting portion 22, the groove width of the groove 26 is matched with the wall thickness of the housing 32, and the end portion of the housing 32 is at least partially inserted into the groove 26 and is abutted against the bottom of the groove 26.

Specifically, the second connecting portion 22 is provided with a locking protrusion 221, and the housing 32 is provided with a bayonet 326 for matching with the locking protrusion 221 provided on the second connecting portion 22.

Specifically, the side of the engaging protrusion 221 provided on the second connecting portion 22 close to the first connecting portion 21 is provided as a straight surface perpendicular to the axial center of the second connecting portion 22, and the side away from the first connecting portion 21 is provided as an inclined surface inclined from the end portion to the root portion in a direction away from the first connecting portion 21.

Specifically, the housing 32 of the heating module 3 is self-locked and installed first, and then the whole heating module 3 is sleeved on the second connecting portion 22, and the end portion of the housing 32 is at least partially inserted into the groove 26 and abuts against the bottom of the groove 26.

In the embodiment of the utility model, the connection between the shell 32 and the fixing member 2 is firmer when the groove 26 is arranged.

Example IV

As shown in fig. 8 and 9, the embodiment of the utility model introduces an air duct using the air duct heating device, which comprises an air duct 5, wherein the air duct 5 further comprises an air inlet 512 and an air outlet 5221, a guide part 4 is arranged at the air inlet 512, the caliber of the guide part 4 gradually decreases from the air inlet 512 to the air outlet 5221, on one hand, the arrangement of the guide part 4 can make the air flow blown from the heating module 3 fast, the drying efficiency is improved, the energy consumption is reduced, and on the other hand, the horn mouth design of the guide part 4 can reduce the impact of the hot air on the inner wall of the air duct 5 while ensuring the speed of the hot air blown from the heating module 3, thereby reducing the noise and improving the experience effect of a user.

Specifically, the flow guiding part 4 is a pipeline with different diameters at two ends, one end with a large diameter is a front air port 41, one end with a small diameter is a rear air port 42, and the radial section of the flow guiding part 4 is a rectangle with four corners in an arc shape.

Specifically, the radial section of the air guiding portion 4 is a smaller rectangle wrapped by a larger rectangle, the front air opening 41 is a rectangle with a larger radial section, four corners are circular arcs corresponding to the air outlet end 72 of the protection cover, the rear air opening 42 is a rectangle with a smaller radial section, the shape of the rectangle corresponds to the radial section of the air supplying duct 51, and the rectangular radial section of the rear air opening 42 is not centered to the rectangular radial section of the front air opening 41, but is deviated to the position of the upper wall 43 of the air guiding portion.

Specifically, the air duct 5 extends up and down, the air guiding portion 4 is disposed at the bottom of the air duct 5, and an inclination angle of inward contraction of the air guiding portion upper wall 43 from the front air opening 41 to the rear air opening 42 is smaller than an inclination angle of inward contraction of the air guiding portion lower wall 44 from the front air opening 41 to the rear air opening 42.

Specifically, the embodiment of the utility model uses the ducted fan 11 to provide hot air, the ducted fan 11 has the characteristics of high rotating speed and high air quantity, and meanwhile, the high air quantity also brings great pressure to the flow guiding part 4 and the air duct 5, so that the service lives of the flow guiding part 4 and the air duct 5 are reduced.

Specifically, the ducted fan 11 is disposed in a protruding manner outside the air inlet end 71 of the protective cover 7, is coaxial with the heating module 3, and is fixed in the protective cover 7, and a ventilation cavity 23 is disposed in the middle of the fixing member 2 in order to allow air blown by the ducted fan 11 to enter the heating module 3.

Specifically, the ventilation area of the ventilation cavity 23 at least ensures that all the wind blown from the ducted fan 11 flows into the heating module 3 from the cavity, so that the situation that the high-speed wind is directly blown to the fixing piece 2 due to insufficient ventilation area of the ventilation cavity 23 is avoided, damage is caused to the fixing piece 2, and the service life of the fixing piece 2 is shortened.

Preferably, the flow guiding portion 4 is provided in a form of being inclined upward from the front tuyere 41 to the rear tuyere 4, and an axis of the flow guiding portion 4 extends from the front tuyere 41 to the rear tuyere 42 in an inclined upward direction.

Specifically, the upper wall 43 of the guiding part can be parallel to the upper wall 78 of the protective cover from the front air opening 41 to the rear air opening 42, and the lower wall 44 of the guiding part is contracted inwards from the front air opening 41 to the rear air opening 42 to be in contact with the air supply duct 51, on one hand, the upper wall 43 of the guiding part is parallel to the upper wall 78 of the protective cover, so that the high-speed hot air blown from the heating module 3 is smoothly blown into the air supply duct 51, the impact of the high-speed hot air on each component is better weakened, the wind resistance is reduced, and the noise is reduced.

Specifically, the two side walls 45 of the deflector 4 are inclined at the same angle from the front tuyere 41 to the rear tuyere 42.

Specifically, the side of the circumference wall of the guiding part 4 is the cambered surface 46, the direction from the front air port 41 to the rear air port 42 is the cambered surface 46 with gradually reduced width, the two sides of the cambered surface 46 of the upper half are connected with the upper wall 43 and the side wall 45 of the guiding part, the two sides of the cambered surface 46 of the lower half are connected with the lower wall 44 and the side wall 45 of the guiding part, on one hand, the cambered surface 46 is arranged to correspond to the protective cover 7, the overall aesthetic property is improved, and on the other hand, the arc structure can also effectively reduce the impact of hot air, and reduce the overall vibration so as to reduce noise.

The embodiment of the utility model also provides a connection mode of the heating module 3 and the air duct 5.

Specifically, there is a protective cover 7, the heating module 3 is installed in the protective cover 7, and there is a gap 75 between the heating module 3 and the protective cover 7, and this gap 75 can avoid the heating module 3 from directly contacting with the protective cover 7, resulting in the heat generated by the heating module 3 burning out the protective cover 7, and causing danger.

Specifically, the material of the protective cover 7 should be selected from a heat insulating material or a heat insulating material, and the protective cover 7 should have a certain strength.

Preferably, the material of the protecting cover 7 in the embodiment of the present utility model is plastic, the protecting cover 7 is used for fixing the ducted fan 11, the heating module 3 and the connecting air duct 5, and a material with high strength, shock resistance and corrosion resistance is needed to be used as the protecting cover 7, while the plastic has the advantages of light weight, low price, good chemical stability, shock resistance, corrosion resistance, high specific strength and the like, and becomes the preferred material of the protecting cover 7.

Preferably, the protective cover 7 can be provided with a heat-insulating interlayer or a heat-insulating layer is covered outside the protective cover 7, so that the heat-insulating effect is achieved on one hand; on the other hand, the heat dissipation of the heating module 3 is also reduced.

Specifically, the heating module 3 is installed at one end of the air inlet 512 of the air duct 5, the heating module 3 is installed in the protective cover 7, and a gap 75 is left between the protective cover 7 and the heating module 3, so that the connection between the heating module 3 and the air duct 5 can be completed by directly connecting the protective cover 7 with the air inlet 512 of the air duct 5.

Preferably, the protection cover 7 is detachably mounted at one end of the air inlet 512, on one hand, the assembly of the air duct 5 and the heating module 3 can be realized by arranging all parts of the main body to be matched in a plugging, clamping and other modes, screws are not required to be used in the whole assembly process, so that the assembly efficiency is improved, and on the other hand, the assembly mode of detachable connection is convenient for later maintenance, and all parts are taken out under the condition of not damaging the whole.

Specifically, the protection cover 7 includes an air inlet end 71 and an air outlet end 72, and the air outlet end 72 of the protection cover 7 is inserted into the air inlet 512 or sleeved outside the air inlet 512.

Specifically, establish safety cover 7 cover outside air intake 512, connect through buckle structure between safety cover 7 and the wind channel 5, buckle structure includes: a protrusion provided on one of the protection cover 7 and the air inlet 512; the bayonet is arranged on the other of the protective cover 7 and the air inlet 512 and is matched with the protective cover bulge 73.

Preferably, the protection cover 7 is a cuboid, the edges of the cuboid, which are parallel to the axis, are provided with arc chamfers, the protection cover bayonets are arranged on one side of the protection cover 7, which is close to the air duct 5, the protection cover bayonets are uniformly arranged along the peripheral wall of the protection cover 7, and the protrusions are arranged on the outer surface of the air inlet 512 and are in one-to-one correspondence with the protrusions.

In some possible embodiments, one end of the protective cover 7 with the protective cover bayonet is sleeved outside the air duct 5, the inner surface of the protective cover 7 is attached to the outer surface of the air inlet 512 of the air duct 5, and each protrusion is matched with the protective cover bayonet to enable the heating module 3 to be connected with the air duct 5, so that on one hand, the detachable connection of the heating module 3 and the air duct 5 is achieved, on the other hand, the protective cover 7 is made of plastic material, has good deformation quantity, and is labor-saving in installation.

In other possible embodiments, the protection cover 7 is inserted in the air duct 5, and the protection cover 7 is connected with the air duct 5 through a fastening structure, where the fastening structure includes: a protection cover protrusion 73 provided on one of the protection cover 7 and the air inlet 512; the air supply duct bayonet 513 is provided on the other of the protection cover 7 and the air inlet 512, and is engaged with the protection cover protrusion 73.

Specifically, the hot air flows from the protection cover 7 to the air duct 5, and the protection cover 7 is inserted into the air duct 5, so that leakage of the hot air can be avoided.

Preferably, the protection cover 7 is a cuboid with four corners being circular arcs, the protection cover protrusions 73 are arranged on one side, close to the air duct 5, of the protection cover 7, the protection cover protrusions 73 are uniformly arranged along the peripheral wall of the protection cover 7, and the air supply duct bayonets 513 are arranged in a one-to-one correspondence with the protection cover protrusions 73.

Specifically, the protection cover protrusion 73 is provided on the outer peripheral wall of the protection cover 7, and the outer peripheral wall of the protection cover 7 is bonded to the inner peripheral wall of the air inlet 512 of the air duct 5.

Preferably, the protecting cover protrusion 73 of the present embodiment is disposed such that a side far from the air inlet 512 of the air duct 5 is disposed as a straight surface perpendicular to the outer peripheral wall of the protecting cover 7, and a side near the air inlet 512 of the air duct 5 is disposed as an inclined surface inclined from the end portion to the root portion in a direction near the air inlet 512 of the air duct 5.

Specifically, insert the safety cover 7 in the air intake 512 of wind channel 5, through the joint of the protruding 73 of safety cover and air supply wind channel bayonet 513, realize the connection of heating module 3 and wind channel 5, the protruding 73 one side that is close to wind channel 5 air intake 512 of safety cover is the inclined plane, makes more smooth in the joint, the installation of being convenient for more.

Preferably, at one end of the air inlet 512 near the protective cover 7, a strip-shaped notch extending from the edge of the air inlet 512 toward the direction of the flow guiding part 4 is provided, and the notch is a mounting opening 514 and is distributed at two sides of the air supply duct bayonet 513.

Specifically, the material of wind channel 5 is harder, and the deformation volume is not high, sets up the installing port 514 at wind channel bayonet port 513 both sides, can be in-process that protective cover 7 inserted wind channel 5 air intake 512, and the inclined plane of protective cover arch 73 can make the part of wind channel bayonet port 513 between two installing ports 514 produce the elastic deformation to keeping away from the axle center direction, is convenient for install more.

The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited to the above-mentioned embodiment, but is not limited to the above-mentioned embodiment, and any simple modification, equivalent change and modification made by the technical matter of the present utility model can be further combined or replaced by equivalent embodiments within the scope of the technical proposal of the present utility model without departing from the scope of the technical proposal of the present utility model.

Claims (10)

1. The utility model provides an air duct heating device installs on dish washer's wind channel, includes safety cover (7) and installs heating module (3) in safety cover (7), its characterized in that still includes mounting (2), and shell (32) of heating module (3) are installed in safety cover (7) through mounting (2), exist certain space (75) with between safety cover (7), and the middle part of mounting (2) has ventilation chamber (23).

2. The air duct heating apparatus according to claim 1, wherein the fixing member (2) includes:

a first connection part (21) embedded at the end part of the protective cover (7);

and a second connection part (22) arranged on the first connection part (21) and having a distance from the edge of the first connection part (21) and the ventilation cavity (23) for connecting the end part of the housing (32).

3. The air duct heating apparatus according to claim 2, wherein the first connection portion (21) includes:

a first portion (211) provided on a side close to the housing (32), the radial cross section being rectangular;

a second part (212) arranged at one side far away from the shell (32), wherein the radial section of the second part is a trapezoid with two waists slightly protruding outwards;

the peripheral surface of the first connection portion (21) and the end surface of the first connection portion (21) away from the housing (32) constitute a contact wall (213).

4. A duct heating apparatus according to claim 3, wherein,

the protective cover (7) comprises:

an extension part (742) extending from the end surface of the first connecting part (21) close to the second connecting part (22) along the axial direction in a direction away from the first connecting part (21) and having a length greater than or equal to the length of the housing (32);

a connection end part (741) extending from an end surface of the first connection part (21) near the second connection part (22) in the axial direction in a direction opposite to the extending direction of the extension part (742), and bending in a direction facing the central axis of the housing (32); the inner wall of the connection end part (741) is attached to the contact wall (213) of the first connection part (21).

5. The air duct heating device according to claim 4, wherein the connecting end portion (741) is provided with a limit rib (7611), and the limit rib (7611) is a protrusion extending vertically perpendicular to the inner surface of the connecting end portion (741) on the side close to the air supply device (1); a limit groove (215) corresponding to the limit rib (7611) is arranged on the first connecting part (21).

6. The air duct heating device according to claim 5, characterized in that a convex rib (74) extending inwards along the radial direction is arranged in the protective cover (7), and the convex rib (74) is attached to one side of the first connecting part (21) close to the shell (32); the height of the inner edge of the rib (74) is smaller than the width of the gap (75).

7. The air duct heating device according to any one of claims 2 to 6, wherein the second connecting portion (22) protrudes inward of the protective cover (7), and an outer periphery of the second connecting portion is spaced from an edge of the first connecting portion (21); the end of the housing (32) is sleeved on the second connecting part (22) and is abutted against the first connecting part (21).

8. The air duct heating apparatus according to claim 7, wherein the second connection portion (22) housing (32) is fixed by a clamping structure including:

a clamping protrusion (221) provided on the second connection portion (22) and including a plurality of clamping protrusions uniformly arranged along the circumferential direction of the second connection portion (22);

and the bayonet (326) is arranged on the shell (32) and comprises a plurality of clamping protrusions (221) which are in one-to-one correspondence with the second connecting part (22).

9. The air duct heating device according to claim 2, wherein the second connecting portion (22) is a groove formed in a surface, close to the housing (32), of the first connecting portion (21), the shape of the groove corresponds to that of the housing (32) after self-locking installation, and the outer surface of the housing (32) is attached to the inner surface of the second connecting portion (22) and is connected through a clamping structure.

10. A dishwasher, characterized in that a tunnel heating device as claimed in any one of the preceding claims 1-9 is installed.