CN219888296U

CN219888296U - Be applied to duct fan and dish washer of dish washer

Info

Publication number: CN219888296U
Application number: CN202320740799.2U
Authority: CN
Inventors: 郝铁钢; 杨林; 宋军; 解婷; 黄文杰; 吕冬阳
Original assignee: Qingdao Haier Dishwasher Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Dishwasher Co Ltd; Haier Smart Home Co Ltd
Priority date: 2023-04-06
Filing date: 2023-04-06
Publication date: 2023-10-24
Anticipated expiration: 2033-04-06
Also published as: CN220910071U

Abstract

The utility model discloses a ducted fan applied to a dish washer and the dish washer, wherein the ducted fan comprises: the rotating shaft is provided with an impeller, a bearing and a rotor magnet in sequence along the air supply direction; the ratio of the axial length of the rotating shaft to the axial length of the bearing is 2-3. According to the utility model, through designing the dimensional relation between the bearing and the rotating shaft, enough support is provided for the rotating shaft, and the size of the ducted fan is small enough under the condition that the rotating speed of the ducted fan is enough to enable the dish-washing machine to dry quickly, so that the space occupied by the dish-washing machine is small.

Description

Be applied to duct fan and dish washer of dish washer

Technical Field

The utility model belongs to the field of dish washer fans, and particularly relates to a ducted fan applied to a dish washer and the dish washer.

Background

At present, the drying principle of most dish washers is as follows: the air blown out by the fan passes through the heating part and the air channel and enters the cavity of the dish-washing machine, so that the temperature rise and the evaporation of water in the dish-washing machine are realized. In the process, the rotating speed of the fan and the temperature of the heating part have great influence on the drying effect of the dish washer.

In addition, the size of the fan directly determines the opening size of the air duct matched with the fan, the opening size of the heating part and the size of the dish washer drying module matched with the fan.

The ducted fan is a fan with a duct arranged on the periphery of the free propeller, and the existing ducted fan has the problem of oversized size, so that the existing ducted fan cannot be matched with the whole size of the dish washer, and the existing dish washer has no precedent of applying the ducted fan.

In view of this, the present utility model has been made.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the ducted fan applied to the dish-washing machine, and the rotational speed of the ducted fan is enough to enable the dish-washing machine to be dried quickly, the size of the ducted fan is small enough, and the space occupied by the dish-washing machine is small through the length proportion relation among the rotating shaft, the rotor magnet and the bearing and the position relation and the size relation among the rotating shaft, the rotor magnet and the bearing.

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

the utility model provides a ducted fan applied to a dish washer, comprising,

the rotating shaft is provided with an impeller, a bearing and a rotor magnet in sequence along the air supply direction;

The ratio of the axial length of the rotating shaft to the axial length of the bearing is 2-3.

According to the utility model, the stability of the rotating shaft on the bearing of the ducted fan at high rotating speed is ensured by designing the ratio of the axial length of the rotating shaft to the axial length of the bearing, and the rotating shaft is stable enough when the overall size of the ducted fan is smaller, so that the generated shaking and noise are smaller, and the ducted fan only needs to be provided with one bearing, so that the ducted fan has a simple structure and is convenient to install.

The utility model further provides the following scheme: the ratio of the axial length of the rotor magnet to the axial length of the rotating shaft is 0.25-0.3.

In the scheme, the ratio of the axial length of the rotor magnet to the axial length of the rotating shaft is designed, so that the moment generated by the combined action of the rotor magnet and the stator ensures that the rotating speed of the rotating shaft (117) reaches at least 110000rpm under the condition that the rotating shaft is not twisted off or worn.

The utility model further provides the following scheme: the ratio of the axial length to the outer diameter of the bearing is 3.5-4.5, and the ratio of the outer diameter to the inner diameter of the bearing is 2.5-3.5.

In the scheme, the bearing has better stability and smaller size by designing the structural proportion relation of the bearing.

The utility model further provides the following scheme: the ratio of the outer diameter to the inner diameter of the impeller is 8.5-9.5, the ratio of the outer diameter of the impeller to the outer diameter of the rotor magnet is 4-5, and the ratio of the axial length of the impeller to the axial length of the rotor magnet is 0.6-0.8.

In the scheme, through the size of the fan blade of the impeller, the large air output is realized under the condition that the rotating torque generated by the impeller can not cause the rotating shaft to twist off and be worn, and the dish washer has a good drying effect.

The utility model further provides the following scheme: the rotary shaft is coaxially arranged in the fan shell, and the stator is coaxially arranged outside the rotor magnet;

the stator is at least partially located outside of the fan housing.

In the scheme, through setting the position relation between the stator and the fan shell, the duct of the fan shell is larger in size under the condition that the size of the fan shell is smaller, so that the duct fan has larger air output, and the dish washer has better drying effect.

The utility model further provides the following scheme: the ratio of the axial length of the stator positioned outside the fan shell to the axial length of the stator positioned inside the fan shell is 1.43-1.45.

In the scheme, the length proportion of the stator inside and outside the fan shell is set, so that the size of the fan shell is further reduced, and the miniaturization of the whole size of the ducted fan is realized.

The utility model further provides the following scheme: the ratio of the radial length of the fan housing to the outer diameter thereof is 0.9-1.1, the axial length thereof is not more than 43 mm, and the radial diameter thereof is not more than 30 mm.

In the scheme, through designing the structural dimension relation of the fan shell, the small dimension and large air output are realized.

The utility model further provides the following scheme: the ratio of the axial length of the stator and the fan housing is 0.46-0.48.

In the scheme, the length proportion of the stator and the fan shell is designed, so that the stator and the fan shell can be connected in a simple mode such as glue or clamping, and the stator and the fan shell have good stability in the working process.

The utility model further provides the following scheme: the stator is located the outside one end of fan shell and is equipped with the wiring board, and the outer wall of fan shell is close to the position of air outlet and is equipped with the wiring mouth, the wiring mouth is U type opening.

In the scheme, through the arrangement of the wiring board and the wiring port respectively, the wiring terminal and the grounding wire of the ducted fan are separated, and the size of the ducted fan is further reduced.

The utility model also provides a dishwasher comprising a ducted fan as described above.

By adopting the technical scheme, compared with the prior art, the utility model has the following beneficial effects.

1. According to the utility model, the stability of the rotating shaft on the bearing at high rotating speed of the ducted fan is ensured by designing the ratio of the axial length of the rotating shaft to the axial length of the bearing, the generated shaking and noise are small, and the ducted fan has a simple structure and is convenient to install;

2. the utility model designs the dimensional relationship among the rotating shaft, the rotor magnet, the bearing, the stator, the wiring port, the wiring board and the fan shell, so that the overall size of the ducted fan is smaller, the rotating shaft is stable enough, and the space occupied by the dish washing machine is smaller;

3. the utility model realizes that the ducted fan has larger air output under the condition of torsion and abrasion of the rotating shaft by designing the position relation among the rotating shaft, the rotor magnet, the bearing, the stator, the wiring port, the wiring board and the fan shell, so that the dish washer has better drying effect.

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 view of a ducted fan used in a dishwasher according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a ducted fan assembly structure for a dishwasher in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic side view of a ducted fan assembly structure for a dishwasher in accordance with an embodiment of the present utility model;

FIG. 4 is a schematic view of a heater in a dishwasher in accordance with an embodiment of the present utility model;

FIG. 5 is an exploded view of FIG. 4 in accordance with the present utility model;

FIG. 6 is a schematic view of a support for a heater in an embodiment of the utility model;

FIG. 7 is another angular schematic view of FIG. 6 in accordance with the present utility model;

FIG. 8 is a schematic diagram of a heater wire of a heater in an embodiment of the utility model;

FIG. 9 is a schematic view of a ceramic seat in an embodiment of the utility model;

FIG. 10 is a schematic view of the utility model at another angle to FIG. 9;

FIG. 11 is a schematic diagram of the relative positions of the blower, ceramic base and heater in an embodiment of the utility model;

FIG. 12 is a schematic view of the ceramic pedestal and heater connection of the present utility model;

FIG. 13 is a schematic view of a blower, a fixture, and a heating module connected in sequence in an embodiment of the utility model.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

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.

As shown in fig. 1 to 3, the ducted fan applied to the dish washer ensures that the size of the ducted fan is small enough under the condition that the rotating speed of the ducted fan is enough to enable the dish washer to dry quickly and the space occupied by the dish washer is small through the length proportion relation of the rotating shaft, the rotor magnet and the bearing and the position relation and the size relation among the rotating shaft, the rotor magnet, the bearing, the stator, the wiring port, the wiring board and the fan shell.

Example 1

In this embodiment, as shown in fig. 1, there is provided a ducted fan 11 applied to a dishwasher, including: a rotation shaft 117, wherein an impeller 115, a bearing 112, and a rotor magnet 111 are sequentially provided on the rotation shaft 117 in the air blowing direction;

The ratio of the axial length of the rotating shaft 117 to the axial length of the bearing 112 is 2 to 3.

In this embodiment, as shown in fig. 1, the fan housing 114 has an inner ring and an outer ring, a duct of the ducted fan 11 is formed between the inner ring and the outer ring, a bearing 112, a part of a stator 113 and a part of a rotor magnet 111 are disposed in the inner ring, the impeller 115 and the rotor magnet 111 are fixed on the rotating shaft 117, and the bearing 112 is clamped with the inner ring of the fan housing 114 to provide support for the rotating shaft 117, so that the ratio of the axial length of the rotating shaft 117 to the axial length of the bearing 112 directly determines the rotation stability of the impeller 115. If the axial length of the bearing is too short relative to the axis of rotation, the problem may occur that the supported axis of rotation 117 is unstable and vulnerable to damage during rotation.

In this embodiment, the ratio of the axial length of the rotation shaft 117 to the axial length of the bearing 112 may be 2.9, the axial length of the rotation shaft 117 may be 42 mm, and the axial length of the bearing 112 may be 14.2 mm.

In this embodiment, the ratio of the axial length of the rotor magnet 111 to the axial length of the rotation shaft 117 is 0.25 to 0.3.

In this embodiment, by designing the ratio of the axial length of the rotor magnet 111 to the axial length of the rotating shaft 117, it is ensured that the torque generated by the combined action of the rotor magnet 111 and the stator 113 can make the rotating speed of the rotating shaft 117 reach at least 110000rpm without twisting and wearing the rotating shaft 117, and the ducted fan 11 only needs to be provided with a bearing, so that the structure is simple and the installation is convenient.

In this embodiment, the ratio of the axial length of the rotor magnet 111 to the axial length of the rotation shaft 117 may be 0.3, the axial length of the rotor magnet 111 may be 12 mm, and the axial length of the rotation shaft 117 may be 40 mm.

In this embodiment, the ratio of the axial length and the outer diameter of the bearing 112 is 3.5-4.5, and the ratio of the outer diameter of the bearing 112 to the inner diameter thereof is 2.5-3.5.

In this embodiment, the bearing 112 is designed to have better stability and smaller size when applied to the ducted fan 11.

In this embodiment, the axial length of the bearing 112 may be 14.2 mm, the inner diameter of the bearing 112 may be 3 mm, and the outer diameter of the bearing 112 may be 10 mm.

In this embodiment, the ratio of the outer diameter to the inner diameter of the impeller 115 is 8.5-9.5, the ratio of the outer diameter of the impeller 115 to the outer diameter of the rotor magnet 111 is 4-5, and the ratio of the axial length of the impeller 115 to the axial length of the rotor magnet 111 is 0.6-0.8.

In this embodiment, by designing the size of the blades of the impeller 115, the ducted fan 11 has a larger air output under the condition that the rotation torque generated by the impeller does not twist off and wear the rotation shaft 117, so that the dishwasher has a better drying effect.

In this embodiment, the outer diameter of the impeller 115 may be 27 mm, the inner diameter of the impeller 115 may be 3 mm, the outer diameter of the rotor magnet 111 may be 6 mm, the axial length of the impeller 115 may be 8 mm, and the axial length of the rotor magnet 111 may be 12 mm.

In the present embodiment, the air conditioner further includes a fan housing 114 and a stator 113, the rotation shaft 117 is coaxially disposed in the fan housing 114, and the stator 113 is coaxially disposed outside the rotor magnet 111;

the stator 113 is at least partially located outside the fan housing 114.

In this embodiment, as shown in fig. 2, by setting the positional relationship between the stator 113 and the fan housing 114, the fan housing 114 has a larger duct size under the condition of smaller size, so that the duct fan 11 has a larger air output, and the dishwasher has a better drying effect.

In this embodiment, the stator 113 includes a wire frame 1131 and three groups of enameled wires 1132, wherein the three groups of enameled wires 1132 are wound on the wire frame 1131, and different currents are connected through the three groups of enameled wires 1132 to generate a rotating magnetic field so as to rotate the rotor magnet 111 positioned in the stator 113.

In this embodiment, the stator 113 is located outside the fan housing 114 and has an axial length ratio of 1.43 to 1.45 within the fan housing 114.

In this embodiment, the length ratio of the stator 113 inside and outside the fan housing 114 is set, so that the size of the fan housing 114 is further reduced, and the overall size of the ducted fan 11 is miniaturized.

In this embodiment, the length of the stator 113 located outside the fan housing 114 may be 7.7 mm, and the length of the stator 113 may be 13 mm.

In this embodiment, the ratio of the radial length of the fan housing 114 to the outer diameter thereof is 0.9-1.1, the axial length thereof is not more than 43 mm, and the radial diameter thereof is not more than 30 mm.

In this embodiment, by designing the structural dimensional relationship of the fan housing 114, a small size and a large air output are realized.

In this embodiment, the radial length of the blower housing 114 may be 28.2 millimeters, the outer diameter of the blower housing 114 may be 28.8 millimeters, and the minimum inner diameter may be 10 millimeters.

In this embodiment, the ratio of the radial length of the blower housing 114 to its outer diameter may be 0.97.

In this embodiment, the ratio of the axial length of the stator 113 to the axial length of the fan housing 114 is 0.46 to 0.48.

In this embodiment, by designing the length ratio of the stator 113 and the fan housing 114, it is realized that the stator and the fan housing can be connected by glue or clamping in a simple manner, and the stator and the fan housing have better stability in the working process.

In this embodiment, the length of the stator 113 may be 13 mm, and the length of the blower housing 114 may be 28 mm.

In this embodiment, a terminal plate 116 is disposed at one end of the stator 113 outside the fan housing, a terminal opening 118 is disposed at a position of the outer wall of the fan housing 114 near the air outlet, and the terminal opening 118 is a U-shaped opening.

In this embodiment, the wiring terminal of the ducted fan 11 is separated from the ground wire by the separate arrangement of the wiring board 116 and the wiring port 118, further reducing the size of the ducted fan 11. Specifically, as shown in fig. 3, the wiring board 116 is used for wiring the three U, V, W terminals of the stator 113, and the ground wire has a U-shaped terminal, and is clamped with the wiring port 118.

In this embodiment, the rotational speed of the ducted fan 11 is selected according to the specific performance effect of the dish washer drying module, and the rotational speed and the drying time are determined, so that the drying performance is guaranteed by matching with the corresponding air duct structural design, and the drying effect is improved to the greatest extent. Thereby improving the overall performance of the dishwasher.

In this embodiment, the rotation shaft of the ducted fan 11 has stability on the bearing at high rotation speed, and when the overall size of the ducted fan 11 is smaller, the rotation shaft is stable enough, the generated shaking and noise are smaller, and the ducted fan 11 only needs to be provided with one bearing, so that the structure is simple and the installation is convenient. Meanwhile, the ducted fan 11 has a miniaturized structure, is suitable for a dish washer, and has the air supply effect of high air speed and large air quantity.

Example two

As shown in fig. 1 to 12, the present embodiment provides a dishwasher, which includes an air blower 1 and a heater, wherein the air blower 1 includes the ducted fan 11 according to the first embodiment, and the heater includes a supporting member 31, a heating wire 33, and a housing 32.

Specifically, in the embodiment of the present utility model, the heating wire 33 is mounted on the supporting member 31.

The supporting member 31 is disposed in the housing 32, and the housing 32 is disposed corresponding to the air blower 1.

A gap is left between the heating wire 33 and the inner wall of the housing 32, and the wind blown by the ducted fan 11 passes through the gap and the heating wire 33.

The dish washer still includes wind channel and inner bag, the air outlet of heater and the air inlet end intercommunication in wind channel, the air outlet end in wind channel with the inner bag intercommunication. The heating wire 33 can instantaneously generate larger heat, the ducted fan 11 drives air flow to pass through the heating wire 33 for heating, and then the air flow enters the liner along the air channel for drying the inside of the liner.

Preferably, the air supply device 1 is disposed corresponding to the casing 32, and the air supplied by the air supply device 1 passes through the heating wire 33 and the space between the casings 32 and the heating wire 33, so that when the air supply device 1 continuously supplies air and the wind pressure and the wind speed are high, an air curtain can be formed at the space, the heat transferred from the heater 33 to the space can be rapidly taken away, and an air curtain isolation belt is formed at the space between the heating wire 33 and the casings 32, which is beneficial to protecting the casings 32 and prolonging the service life of the casings 32.

In the above scheme, by arranging the air supply device 1 with the duct fan, the wind power of the air supply device 1 can be increased; all the air fed by the air supply device 1 passes through the gaps between the heating wires 33 and the shell 32 and the heating wires 33, an air curtain can be formed at the gaps, the heat transferred to the gaps by the heater 33 and part of the heat released by the heating wires 33 can be rapidly taken away, hot air with higher temperature and larger air quantity is formed, and the heating effect of the heater is improved.

Further, the supporting member 31 includes a first supporting plate 311 and a second supporting plate 312 disposed in a crisscross manner, a first mounting groove 3122 and a second mounting groove 3115 are respectively disposed on the second supporting plate 312 and the first supporting plate 311, the heating wire 33 is disposed along the first mounting groove 3122 and the second mounting groove 3115, and the heating wire 33 is spirally wound on the supporting member 31 and has a quadrangular cross section.

Specifically, the first mounting groove 3122 and the second mounting groove 3115 each have a sufficient depth. The heater strip 33 is disposed along the first mounting groove 3122 and the second mounting groove 3115, so that the winding radius of the heater strip 33 may be increased, the total length of the heater strip 33 may be increased, the resistance of the heater strip 33 may be increased along with the increase of the length thereof, and the heat generated by the heater strip 33 may be increased along with the increase of the resistance, so that the heater strip 33 may release more heat, and the heating effect may be enhanced under the action of the air supply device 1, so as to satisfy the user's requirement.

In the above-mentioned aspect, the heating wire 33 is disposed along the first mounting groove 3122 and the second mounting groove 3115, and the winding radius of the heating wire 33 is increased, so that the total length of the heating wire 33 is increased, the heat generated by the heating wire 33 can be increased, and the heating effect of the heater is improved.

Specifically, the quadrangle is rectangular.

Preferably, the quadrangle is square, and the heat released by the heating wire 33 is the greatest.

Specifically, a plurality of first protrusions 3121 are disposed on opposite sides of the second support plate 312, and the first protrusions 3121 are abutted with the inner sidewall of the housing 32. A first mounting groove 3122 is formed between adjacent first protrusions 3121.

The first support plate 311 is provided with protrusions 3110 on opposite sides thereof. The protrusion 3110 includes a first protrusion 3111 and second protrusions 3112 disposed at both sides of the first protrusion 3111. The first protruding portion 3111 is longer than the second protruding portion 3112, and the first protruding portion 3111 and the second protruding portion 3112 located on the same side of the first support plate 311 are disposed with high middle and low sides, and are shaped like a mountain.

Specifically, the first protrusion 3111 includes a plurality of second protrusions 3113, the second protrusion 3112 includes a plurality of third protrusions 3114, the second protrusions 3113 are longer than the third protrusions 3114, second mounting grooves 3115 are formed between adjacent two of the second protrusions 3113, adjacent two of the third protrusions 3114, and adjacent the second protrusions 3113 and the third protrusions 3114, and the heating wires 33 are disposed along the first mounting grooves 3122 and the second mounting grooves 3115.

Further, the heating wire 33 itself is spirally wound on the support 31 along the first and second mounting grooves 3122 and 3115.

In the above-mentioned aspect, the heating wire 33 is wound on the supporting member 31 along the first mounting groove 3122 and the second mounting groove 3115, so as to increase the total length of the heating wire 33, further increase the resistance of the heating wire 33, and increase the heat released by the heating wire 33.

More specifically, the heating wire 33 is bent from one wire to form a spiral coil having a plurality of spiral structures, and then the spiral coil is wound along the plurality of first mounting grooves 3122 and the plurality of second mounting grooves 3115, which increases the total length of the heating wire 33 wound on the support 31, thereby increasing the resistance of the heating wire 33, increasing the heat released from the heating wire 33; the heater wire 33 is spirally wound around the support member 31 along the first mounting groove 3122 and the second mounting groove 3115, so that the heater wire 33 can be limited, and the shaking of the heater wire 33 can be reduced.

Further, a ceramic seat 2 is disposed between the air supply device 1 and the housing 32, the ceramic seat 2 has a tuyere 23 and has a circular cross section, the housing 32 is mounted on the ceramic seat 2, and the projection of the heating wire 33 spirally wound on the support member 31 in the direction of the tuyere 23 is inscribed with the tuyere 23.

Specifically, the cross section of the heating wire 33 spirally wound around the supporting member 31 is in a quadrilateral shape, and the projection of the quadrilateral in the direction of the tuyere 23 is inscribed with the tuyere 23; and is quadrangle inscribed in a circle.

In the above scheme, the ceramic seat 2 has better insulation and heat insulation effects, and the heat released by the heating wire 33 is prevented from damaging the air supply device 1 by arranging the ceramic seat 2; the projection of the heating wire 33 spirally wound on the supporting member 31 in the direction of the air inlet 23 is inscribed with the air inlet 23, so that the air sent out by the air supply device 1 passes through the heating wire 33 and the gap, and the heat taken away by the generated hot air is maximized, thereby enhancing the heating effect of the heater.

Specifically, the winding diameter of the heating wire 33 with the supporting member 31 is 30-200mm. The number of windings of the heating wire 33 on the support member 31 is 5-20. The axial length of the heating wire 33 after being spirally wound on the support member 31 is 30-100mm. The heating power of the heating wire 33 is 200-800W. The heating density of the heating wire 33 is 5-10W/cm ² 。

And after the ducted fan is started, the air is quickly changed into hot air, the temperature is quickly up to 50 ℃ and above, and the hot air reaches the inner container of the dish-washing machine along the air duct, so that the quick drying function is realized, and the tableware in the dish-washing machine is air-dried.

The support 31 is disposed at a distance from the ceramic base 2.

Further, one end of the ceramic base 2 is provided with a wiring groove 20, the power line of the heating wire 33 and the power line of the air supply device 1 are all arranged through the wiring groove 20, and the supporting piece 31 is arranged corresponding to the other end of the ceramic base 2.

In the above-mentioned scheme, the support member 31 is far away from the wiring groove 20, so that the heating wire 33 is far away from the wiring groove 20, and the heating wire 33 is prevented from releasing a large amount of heat to damage the power line of the heating wire 33 and the power line of the air supply device 1.

Specifically, the supporting member 31 is installed in the housing 32, the housing 32 is installed at one end of the ceramic base 2, the wiring groove 20 is disposed at the other end of the ceramic base 2, the supporting member 31 is not in contact with the ceramic base 2 and a sufficient distance is left between the supporting member and the ceramic base, so that the heat released by the heating wire 33 is prevented from damaging the power line of the heating wire 33 and the power line of the air supply device 1.

The ceramic base 2 is provided with a clamping protrusion 221, the housing 32 is provided with a bayonet, and the clamping protrusion 221 is clamped with the bayonet, so that the housing 32 can be mounted on the ceramic base 2.

Further, the air outlet of the ducted fan is an annular surface, which is disposed corresponding to the air outlet 23 and the housing 32 and coincides with the central axis of each.

Specifically, the wind generated by the air supply device sequentially passes through the air outlet of the ducted fan, the air outlet 23 and the shell 32, and the respective central axes are overlapped, so that the wind can smoothly pass through, and the loss of the wind in the flowing process is reduced.

Preferably, the projection of the heating wire 33 to the plane of the air outlet of the ducted fan is at least partially overlapped with the coverage area of the air outlet. Therefore, the air outlet of the ducted fan is opposite to the heating wire 33 for air outlet, and the air flow blown out by the ducted fan just passes through the heating wire 33 and the periphery thereof, so that heat released by the heating wire 33 is taken away as much as possible, and hot air with higher temperature can be formed. With the above structure, the heating wire 33 can heat up the passing air flow quickly, and the air supply temperature is ensured, so that the drying effect of the heater can be enhanced.

Further, the housing 32 is provided with a first limiting groove 321, and the first supporting plate 311 is provided with a first protruding portion 3111 matched with the first limiting groove 321.

Further, a portion of the first protrusion 3111 longer than the second protrusion 3112 is inserted into the first stopper 321 on the side wall of the housing 32. The first protruding portion 3111 may protrude from the first limiting groove 321, or may be disposed flush with the outer surface of the housing 32. The entire first protruding portion 3111 abuts against the inner wall of the first limiting slot 321. The second protruding portion 3112 abuts against the inner wall of the housing 32, so that the connection between the first support plate 311 and the housing 32 is more stable.

In one embodiment of the present utility model, the housing 32 includes a first side plate 322, a second side plate 323, a third side plate 324, and a fourth side plate 325, wherein the first side plate 322, the second side plate 323, the third side plate 324, and the fourth side plate 325 are sequentially bent and connected, and the first side plate 322 is clamped with the fourth side plate 325.

In the above-mentioned scheme, the first side plate 322, the second side plate 323, the third side plate 324 and the fourth side plate 325 are sequentially bent and connected, and a cuboid box body with two open ends is formed after sequentially bending, and the first side plate 322 and the fourth side plate 325 can form a stable shell 32 by clamping, so that the support member 31 is convenient to install.

Specifically, the distance between the first protrusions 3111 disposed on opposite sides of the first support plate 311 is greater than the distance between the opposite inner sidewalls of the housing 32, so that the housing 32 needs to be opened first, the support 31 is put in, and then the housing 32 is closed. The housing 32 is a sheet metal part.

The second side plate 323 and the fourth side plate 325 are respectively provided with the first limiting groove 321, and the first limiting groove 321 is inserted into the first protruding portion 3111.

When in use, after the housing 32 is opened, the first side plate 322, the second side plate 323 and the third side plate 324 may be bent, at this time, the fourth side plate 325 is in a horizontal placement state, then the supporting member 31 is placed in the first protruding portion 3111 on one side of the supporting member 31 is inserted into the first limiting groove 321 on the second side plate 323, then the fourth side plate 325 is bent, in this process, the first limiting groove 321 on the fourth side plate 325 is inserted into the first protruding portion 3111 on the other side of the supporting member 31, and then the first side plate 322 and the fourth side plate 325 are clamped.

The inner wall of the housing 32 is provided with a heat insulating member, the heat insulating member is provided with a second limit groove 3421 matched with the first protruding part 3111, and the first protruding part 3111 sequentially passes through the second limit groove 3421 and the first limit groove 321.

In the above scheme, by arranging the heat insulating member, the heat insulating effect can be achieved, the heat transferred from the heating wire 33 to the housing 32 is reduced, the housing 32 can be protected, and the service life of the housing 32 can be prolonged; the protrusion is inserted into the second limiting groove 3421, so that the supporting member 31 and the heat insulating member are stably connected.

Specifically, as shown in fig. 2, the heat insulating member includes a first mica sheet 341 and a second mica sheet 342, the inner sides of the first side plate 322 and the third side plate 324 are respectively provided with the first mica sheet 341, the inner sides of the second side plate 323 and the fourth side plate 325 are respectively provided with the second mica sheet 342, the second mica sheet 342 is provided with a second limiting groove 3421 matched with the second protrusion 3113, and the second protrusion 3113 sequentially passes through the second limiting groove 3421 and the first limiting groove 321.

The first mica sheet 341 and the second mica sheet 342 are disposed on the inner side wall of the casing 32, so that insulation and heat insulation effects can be achieved, heat transferred from the heating wire 33 to the casing 32 is reduced, the casing 32 can be protected, and the service life of the casing 32 is prolonged. The second mica sheet 342 is provided with the second limiting groove 3421 matched with the second protrusion 3113. The number of the second limiting grooves 3421 is the same as that of the second protrusions 3113, and the second limiting grooves 3421 are disposed corresponding to the first limiting grooves 321. The second protrusions 3113 are matched with the second limiting grooves 3421, so that the first support plate 311 and the second mica sheet 342 are stably connected and are not easy to shake. When the air blowing device 1 blows air, noise generated by collision between the supporting member 31 and the second mica sheet 342 can be reduced.

In this embodiment, the dish washer adopts the cooperation of duct fan and heater, and the duct fan can produce great wind-force, and the heater strip 33 of heater can release great heat, and the hot-blast that the wind-force is great can be formed in the cooperation of two, and hot-blast entering dish washer inner bag through the wind channel can dry the tableware, and drying effect is better.

Example III

As shown in fig. 1 to 13, the present embodiment provides a dishwasher including an air supply device including the ducted fan 11 of the first embodiment.

Specifically, in the embodiment of the present utility model, the ducted fan 11 has an air inlet channel and an air outlet channel, and the central axis of the air inlet channel coincides with the central axis of the air outlet channel. The ducted fan 11 comprises a fan housing 114 and a fan arranged in the fan housing 114, wherein the rotation axis of the fan coincides with the central axis of the air inlet channel and/or the air outlet channel.

As shown in fig. 13, the ducted fan is a structure for driving external air flow to finally enter the inner container of the dish washer through the air duct structure. The ducted fan comprises a fan shell 114, a motor is arranged in the fan shell 114, and a rotating shaft of the motor coincides with the central shaft of the air inlet channel. The ducted fan also comprises a fan which is surrounded in the fan shell, and the section of the fan is in a curved crescent shape. The rotation axis of the fan coincides with the central axes of the air inlet channel and the air outlet channel. The ducted fan provided by the embodiment is provided with an air inlet channel and an air outlet channel, and the central axis of the air inlet channel is overlapped with the central axis of the air outlet channel. That is, the duct fan adopted in this embodiment is adopted, after wind enters the air inlet channel, the fan rotates to push the wind out of the air outlet channel, and the air outlet channel and the air inlet channel are in a straight-line through structure.

The fan of this embodiment adopts the ducted fan, namely the central axis of air inlet channel with the central axis coincidence of air-out passageway, and the wind pressure that this kind of structure produced is big, and the windage is little, and the amount of wind is big. Finally, the air quantity in the liner of the dish washer is increased, and the drying efficiency of the dish washer is improved. And because the fan is enclosed in the duct shell, the structure is compact, and the safety is high.

Because the ducted fan is adopted in the embodiment, the wind resistance is small, the air inlet quantity is large, and the drying efficiency of the air channel of the dish washer can be improved. However, the noise generated by the high-frequency vibration of the ducted fan during the operation process is reduced, and in a further scheme of the embodiment, the air supply device further comprises a shock pad 12, and the shock pad 12 is sleeved on the periphery of the fan shell. In this embodiment, the shock pad 12 is an integrally formed structure and is sleeved on the outer periphery of the duct fan housing along the air supply direction. The cushion 12 is made of an elastic material capable of being deformed to some extent.

In this embodiment, one end of the cushion 12 extends outside the intake end of the ducted fan. That is, at the air inlet end of the fan, the shock pad 12 extends beyond the fan housing and away from the fan housing, and a circle of saw-tooth structure 122 is provided along the outer periphery of the shock pad 12 at the end thereof. And the other end of the shock pad 12 extends to the outside of the air outlet end of the blower 11. That is, at the air outlet end of the fan, the shock pad 12 extends beyond the fan housing and extends away from the fan housing.

In another aspect of this embodiment, the damper 12 is integrally provided, but the thickness of the damper 12 at the air inlet end position and the thickness of the damper 12 at the air outlet end position are greater than the thickness of the damper 12 at the fan middle position.

In another aspect of this embodiment, the damper 12 is not integrally formed, but includes two parts, namely, an air inlet end damper 12 and an air outlet end damper 12. The air inlet end shock pad 12 and the air outlet end shock pad 12 are respectively sleeved at the air inlet end position and the air outlet end position of the fan shell, the middle is provided with a space, the air inlet end shock pad 12 exceeds the fan shell and extends towards the direction far away from the fan shell, a circle of saw-tooth-shaped structure 122 is arranged on the outer periphery of the air inlet end shock pad 12, and the saw-tooth-shaped structure 122 comprises a plurality of continuous smooth grooves and smooth protrusions. At the air outlet end of the fan, the shock pad 12 at the air outlet end exceeds the fan shell and extends away from the fan shell.

Because the ducted fan is adopted in the embodiment, the wind resistance is small, the air inlet quantity is large, and the drying efficiency of the air channel of the dish washer can be improved. However, in order to reduce the vibration frequency, in a further aspect of the present embodiment, at least one circle of protruding structures 121 is disposed along the circumference of the outer side surface of the shock pad 12, and the protruding structures 121 are disposed at intervals. In the specific scheme of the embodiment, two circles of protruding structures 121 are arranged on the outer side surface of the shock pad 12 in the axial direction, the protruding structures 121 are arranged in the middle of the shock pad 12, and a certain interval is reserved between the protruding structures 121 of the two circles. The convex structure 121 is a hemispherical structure with a smooth surface.

In this embodiment, when the ducted fan generates vibration during operation, the vibration is transferred to the shock pad 12, the bump structure 121 on the shock pad 12 absorbs the vibration first, and then the vibration is transferred to the shock pad 12 for re-absorption.

In a further scheme of this embodiment, the air supply device further includes a fan protection cover 13, and in this embodiment, the fan protection cover 13 is a sleeve structure sleeved on the outer peripheral surface of the shock pad 12, and two ends of the fan protection cover 13 are respectively arranged in the same direction with the air inlet and the air outlet of the ducted fan. The fan protection cover 13 is provided with a convex mounting rib on the inner side surface, the mounting rib is of an annular structure extending along the circumferential direction of the fan protection cover 13, the outer periphery of the shock pad 12 is abutted against the mounting rib, and the inner peripheral surface of the fan protection cover 13 is arranged at intervals with the outer surface of the shock pad 12.

In a further aspect of this embodiment, the fan protection cover 13 is provided with a baffle 132 perpendicular to the air inlet direction at the position of the air inlet, and the baffle 132 is provided with a filtering hole 131. The tips of the saw-tooth like structures 122 on the shock pad 12 abut the baffle 132. In the present embodiment, the baffle 132 and the fan guard 13 are integrally provided. In other versions of the present embodiment, the baffle 132 and the fan guard 13 may be detachably connected.

In a further aspect of this embodiment, the peripheral wall of the fan protection cover 13 is provided with a plurality of filter holes 131, and the filter holes 131 are distributed at intervals along the circumferential direction or the axial direction of the peripheral wall of the fan protection cover 13.

In this embodiment, only one mounting rib, namely, the first mounting rib 133 is provided, and the filter holes 131 in the peripheral wall of the fan guard 13 are provided between the first mounting ribs 133 of the baffle 132. Since the peripheral wall of the fan protection cover 13 is provided with the filtering holes 131, wind can enter the ducted fan from the filtering holes 131 on the baffle 132, and can enter the ducted fan from the filtering holes 131 arranged on the fan protection cover 13 through the gaps between the zigzag structures 122 and the baffle 132. And because the mounting ribs support the ducted fan, the fan shell and the fan protecting cover 13 are not arranged next to each other, but have a certain interval. Therefore, in this scheme, owing to be provided with the filtration pore 131 on the perisporium of fan safety cover 13, and set up the installation muscle at the internal surface of fan safety cover 13 to make the wind of duct fan whole body all can be absorbed by the duct fan, promoted the air inlet efficiency of duct fan greatly.

In a preferred embodiment of the present embodiment, the first mounting rib 133 is disposed at a rear position in the ducted fan, so that the mounting holes are provided more and the air intake is greater.

In another aspect of this embodiment, only the second mounting bead 134 is provided, with an air passage between the second mounting bead 134 and the outer periphery of the shock pad 12. In this embodiment, the air gap extends through the second mounting rib 134 along the axial direction of the fan protection cover 13. The filter holes 131 can be arranged at any position on the peripheral wall of the fan protection cover 13, and when the filter holes 131 on the peripheral wall of the fan protection cover 13 are arranged at the positions from the second mounting ribs 134 to the air outlets of the ducted fans, wind enters the space between the ducted fans and the fan protection cover 13 through the filter holes 131, passes through the air outlets on the second mounting ribs 134 and then enters the ducted fans.

In another aspect of this embodiment, the second mounting rib 134 is provided with an inwardly recessed air passage on its inner circumferential surface, and the air passage cooperates with the outer circumferential surface of the damper 12 to form an air passage. That is, when the fan protection cover 13 is sleeved on the outer periphery of the ducted fan, the second mounting rib 134 on the fan protection cover 13 abuts against the shock pad 12, so that the shock pad 12 forms the air gap with the opening blocking column of the air passing groove on the second mounting rib 134. In this embodiment, a plurality of air vents are disposed on the second mounting ribs 134 at intervals.

In another aspect of this embodiment, the mounting bar includes a first mounting bar 133 and a second mounting bar 134; the second mounting rib 134 is provided at a position upstream of the first mounting rib 133 in the air blowing direction; the filter holes 131 on the peripheral wall of the fan guard 13 are provided between the baffle 132 and the first mounting rib 133. In the solution of the present embodiment, the protruding heights of the first mounting rib 133 and the second mounting rib 134 are the same. According to the scheme of the embodiment, due to the fact that the two mounting ribs are arranged, the duct fan is fixed more firmly.

In a further aspect of this embodiment, the fan protection cover 13 is provided with a first limiting portion 135 and a second limiting portion 1362. Wherein, the first limit part 135 and the second limit part 1362 are provided at the end of the fan protection cover 13 along the air supply direction with an annular protrusion structure extending along the circumferential direction of the fan protection cover 13.

Specifically, the first limiting portion 135 has a first inner surface parallel to the axis of the ducted fan and extending toward the air inlet of the ducted fan, and a second inner surface 1352 connected to the extending end of the first inner surface 1351 and extending radially outward of the ducted fan. The second limiting portion 1362 has a third inner surface 1361 connected to an extending end of the second inner surface 1352 and extending parallel to the first inner surface 1351 in the direction of the air intake, and a fourth inner surface connected to an extending end of the third inner surface 1361 and extending radially outward of the ducted fan.

In this embodiment, the second inner surface 1352 abuts against the end face of the damper pad 12 near the air outlet end, and the third inner surface 1361 abuts against the outer circumferential surface of the damper pad 12.

In the present embodiment, the height of the protrusions of the first and second mounting ribs 133, 134 is the same as the height of the fourth inner surface. The baffle 132, the first mounting rib 133, the second mounting rib 134, the first limiting portion 135 and the second limiting portion 1362 together apply an compressive force to the shock pad 12 to secure the ducted fan in the fan guard 13.

In a further aspect of this embodiment, two rings of raised structures 121 are spaced apart on the shock pad 12, and the mounting ribs include a first mounting rib 133 and a second mounting rib 134. The first mounting rib 133 and the second mounting rib 134 are respectively abutted against the two rings of the protruding structures 121 on the shock pad 12.

Since the first and second stopper portions 135 and 1362 are provided at the end of the fan protection cover 13 in the air blowing direction in an annular projection structure extending in the circumferential direction of the fan protection cover 13, and the first stopper portion 135 abuts against the outer end surface of the damper pad 12, the second stopper portion 1362 abuts against the outer circumferential surface of the damper pad 12, thereby forming a stepped seal structure of the damper pad 12 and the fan protection cover 13 at the end of the ducted fan in the air blowing direction. In the present embodiment, the protrusion heights of the first and second mounting ribs 133, 134 are the same as the protrusion height of the second stopper 1362.

In the solution of the embodiment, the ducted fan has a fan housing, which is formed with an air outlet. The fan protection cover 13 is provided with an air supply outlet, the air supply outlet is positioned at the outer side of an air outlet of the ducted fan, and the inner diameter of the air outlet of the ducted fan is smaller than that of the air supply outlet. And the air supply outlet is formed by a first stopper 135 provided at the end of the fan guard 13. And the fan shell is also sleeved with a shock pad 12, and the inner diameter of the fan shell is smaller than the inner diameter of the shock pad 12. That is, the inner diameter of the fan housing is smaller than the inner diameter of the first limiting portion 135, the inner diameter of the damper pad 12 is also smaller than the inner diameter of the first limiting portion 135, and the damper pad 12 and the first limiting portion 135 form a communication structure with an enlarged opening along the air outlet direction.

The scheme of the embodiment further comprises: a fixing member 2 provided at a position downstream of the fan protection cover 13 in the air blowing direction, the fixing member 2 having a ventilation chamber 23 inside. One end surface of the fixing member 2 abuts against the first limiting portion 135. The inner diameter of the first limiting part 135 is smaller than the diameter of the ventilation cavity 23 of the fixing piece 2, and the first limiting part 135 and the fixing piece 2 form a communication structure with gradually enlarged openings along the air outlet direction.

According to the scheme provided by the embodiment, all parts of the air outlet of the ducted fan form a horn mouth shape, namely the shock pad 12, and the first limiting part 135 and the fixing piece form a communication structure with an enlarged inner diameter, so that wind can smoothly enter the air duct of the dish washer.

In the preferred scheme of the embodiment, the inner diameter of the ventilation cavity formed on the fixing piece is gradually increased along the air supply direction, and a horn mouth shape is formed, so that ventilation is smoother.

The foregoing description is only illustrative of the preferred embodiments of the present utility model, and is not to be construed as limiting the utility model, but is to be construed as merely illustrative, and modifications and equivalent arrangements can be made by those skilled in the art without departing from the scope of the utility model.

Claims

1. Be applied to duct fan of dish washer, its characterized in that: the air-conditioning device comprises a rotating shaft (117), wherein an impeller (115), a bearing (112) and a rotor magnet (111) are sequentially arranged on the rotating shaft (117) along the air supply direction;

the ratio of the axial length of the rotating shaft (117) to the axial length of the bearing (112) is 2-3.

2. The ducted fan for a dishwasher of claim 1, wherein:

the ratio of the axial length of the rotor magnet (111) to the axial length of the rotary shaft (117) is 0.25-0.3.

3. The ducted fan for a dishwasher of claim 1, wherein:

the ratio of the axial length to the outer diameter of the bearing (112) is 3.5-4.5, and the ratio of the outer diameter of the bearing (112) to the inner diameter thereof is 2.5-3.5.

4. The ducted fan for a dishwasher of claim 1, wherein:

the ratio of the outer diameter to the inner diameter of the impeller (115) is 8.5-9.5, the ratio of the outer diameter of the impeller (115) to the outer diameter of the rotor magnet (111) is 4-5, and the ratio of the axial length of the impeller (115) to the axial length of the rotor magnet (111) is 0.6-0.8.

5. The ducted fan for a dishwasher according to any one of claims 1 to 4, characterized in that: the motor also comprises a fan shell (114) and a stator (113), wherein the rotating shaft (117) is coaxially arranged in the fan shell (114), and the stator (113) is coaxially arranged outside the rotor magnet (111);

the stator (113) is at least partially located outside the fan housing (114).

6. The ducted fan for a dishwasher of claim 5, wherein:

the stator (113) is located outside the fan housing (114) and has an axial length ratio of 1.43-1.45 within the fan housing (114).

7. The ducted fan for a dishwasher of claim 5, wherein:

the fan housing (114) has a ratio of a radial length to an outer diameter of 0.9-1.1, an axial length of not more than 43 mm, and a radial diameter of not more than 30 mm.

8. The ducted fan for a dishwasher of claim 5, wherein:

the ratio of the axial length of the stator (113) to the fan housing (114) is 0.46-0.48.

9. The ducted fan for a dishwasher of claim 5, wherein:

one end of the stator (113) positioned outside the fan shell is provided with a wiring board (116), the position, close to the air outlet, of the outer wall of the fan shell (114) is provided with a wiring port (118), and the wiring port (118) is a U-shaped opening.

10. A dishwasher, characterized in that it comprises a ducted fan according to any one of claims 1-9.