Air inlet assembly for cleaning machine and cleaning machine

Abstract

The utility model relates to an air inlet assembly for a cleaning machine and the cleaning machine, the air inlet assembly comprises an air inlet pipe, the air inlet pipe is provided with an air inlet and an air outlet which are communicated with the interior of the air inlet pipe, and the air outlet is used for being communicated with a washing cavity of the cleaning machine; the impeller comprises a mounting shaft and blades arranged on the mounting shaft, the mounting shaft extends along the center line of the air outlet and can rotate around the center line of the air outlet, the multiple blades are arranged in the circumferential direction of the mounting shaft at intervals, one end of each blade is connected with the mounting shaft, and the other end of each blade extends in the direction away from the mounting shaft. At least one blade inclines relative to the axial direction of the mounting shaft, so that one wall face of each blade faces the airflow flowing direction to serve as a windward face, and the airflow coverage area is large.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the cleaning machine that can clean tableware and / or fruits and vegetables, and particularly relates to an air inlet assembly for a cleaning machine and the cleaning machine. BACKGROUND

[0002] The cleaning machine, such as a dishwasher, is increasingly common in kitchens. After cleaning tableware, there is a large amount of water vapor in the washing cavity of the dishwasher. In order to dry the tableware and prevent the growth of bacteria, a drying assembly for heating the airflow in the washing cavity is arranged on the outer side wall of the box. The drying assembly inputs hot airflow into the washing cavity to dry the tableware.

[0003] For example, a Chinese utility model patent with the patent number CN202320953636.2 (publication number CN220344366U) discloses a cleaning machine. The drying assembly includes an air inlet pipeline, a heating element, and a second airflow driving member. The air inlet pipeline has a second air inlet and a second air outlet. The second air inlet is in fluid communication with the outside world, and the second air outlet is in fluid communication with a second air inlet hole on the box. In the flow direction of the airflow, the second air outlet is located downstream of the second air inlet. The second airflow driving member is installed on the air inlet pipeline. The second airflow driving member is used to drive the airflow from the outside world through the air inlet pipeline to the second air outlet. In this embodiment, the second airflow driving member is a second fan. The air outlet of the second fan faces the second air inlet of the air inlet pipeline. The air inlet of the second fan is in fluid communication with the outside world.

[0004] The heating element can be a PTC heating element installed in the air inlet pipeline and located on the airflow flow path from the second air inlet to the second air outlet. After the airflow entering the air inlet pipeline is heated into hot airflow by the heating element, the hot airflow enters the washing cavity to dry the tableware.

[0005] The current air inlet pipeline is basically fixedly installed on the box by a nut. The position and area of the air inlet are fixed and cannot be changed. This results in a small air inlet coverage area of the airflow entering from the air inlet. In addition, due to the shielding of the tableware, part of the hot air is blocked back, causing turbulence. The speed of the hot air entering the washing cavity is also rapidly reduced. The hot air can only slowly cover the tableware through the pressure gradient, and the drying efficiency is not high. UTILITY MODEL CONTENTS

[0006] The first technical problem to be solved by the utility model is to provide an air inlet assembly for a cleaning machine with a large airflow coverage area in view of the current status of the prior art.

[0007] The second technical problem to be solved by the utility model is to provide a cleaning machine applying the above-mentioned air inlet assembly in view of the current status of the prior art.

[0008] The utility model discloses a technical scheme for solving the first technical problem is as follows: a kind of air inlet assembly for cleaning machine, including

[0009] Air inlet pipe, which is provided with air inlet and air outlet connected with its inside, the air outlet is used to be connected with the washing cavity of cleaning machine;

[0010] Fan, for driving airflow to flow from air inlet to air outlet;

[0011] It is characterized by further comprising

[0012] Impeller, including mounting shaft and blade provided on mounting shaft, the mounting shaft extends along the center line of air outlet and can rotate around the center line of air outlet, the blade has multiple and is arranged along the circumferential direction of mounting shaft, each blade is connected with mounting shaft at one end, and the other end extends away from mounting shaft, at least one blade is inclined to the axial direction of mounting shaft, so that one wall of blade faces airflow flowing direction as windward surface.

[0013] In order to make the force of airflow acting on impeller be able to push impeller to rotate, all blades are inclined to the axial direction of mounting shaft and have the same inclination angle. In this way, all blades have windward surface that can be impacted by airflow, and the force received by impeller is larger to push impeller to rotate, and all blades are stressed, so that the force received by impeller is balanced and impeller rotates stably.

[0014] Wind power driving needs to overcome the friction force received by mounting shaft, but driving force cannot be too large, and the larger the driving force is, the larger the windward area of blade is, and the larger the wind speed loss is, which is not conducive to diffusion in cavity. Therefore, preferably, the inclination angle of blade is between 25° and 45°.

[0015] Preferably, the number of blades is odd and uniformly distributed along the circumferential direction of mounting shaft. If the number of blades is even and uniformly distributed along the circumferential direction, the driving moment on blades is reverse symmetric, which causes the stress to cancel each other out and cannot drive blades. If the blades are not uniformly distributed along the circumferential direction, the stress is uneven and the driving efficiency is low, and it can also cause jamming.

[0016] Preferably, the impeller further comprises a guide ring, the guide ring has one and is connected with the other end of blade, or the guide ring has at least two and is sequentially and spacedly arranged along the radial direction of mounting shaft, each blade is connected with the inner wall surface of the innermost guide ring from inside to outside; the guide ring is conical and gradually expands in diameter along the flowing direction of airflow. Under the driving of impeller, air inlet is centrifuged, so that the coverage area of air inlet is larger, and the guide ring aims to make the circumferential diffusion range of air inlet larger and improve the coverage area of tableware. Another function of guide ring is to reduce the backflow of air inlet encountering tableware, which causes flow state to be disorderly.

[0017] Preferably, the taper of each said flow guide ring is between 30° and 40°.

[0018] Preferably, a flow guide rib is arranged in the air inlet pipe adjacent to the air outlet, and the angle between the extension line of the downstream end of the flow guide rib and the horizontal line passing through the center line of the air outlet is α, 45°≤α≤60°. Since the greater the friction between the impeller and the air inlet pipe, the greater the driving force required, the greater driving force requires greater windward area, but is not conducive to wind speed loss. The design of the flow guide rib is equivalent to making a pre-rotation design in the air inlet pipe, allowing the airflow to blow in from one side of the impeller, which increases the driving force near the installation shaft and increases the driving torque, enabling the installation shaft to be driven with less wind speed loss.

[0019] Preferably, the wall surface of the blade facing the airflow is referred to as the windward surface, the end of the blade connected to the installation shaft is the first end, and the other end of the blade is the second end. The area of the windward surface of the blade increases from the first end to the second end. Wind power driving needs to overcome bearing friction, and the greater the normal blade driving force means the greater the windward area of the blade, and the greater the wind speed loss, which is also not conducive to diffusion in the cavity. The wind speed at the air outlet is basically uniform, so the torque at a position farther from the center of the installation shaft is greater. Therefore, the benefits obtained by increasing the windward area of the outer side (the side away from the installation shaft) will be much higher than those obtained by increasing the windward area of the center. Therefore, the windward area of the blade near the center is reduced, and the windward area of the blade near the outer side is increased.

[0020] Preferably, the inclination angle of the blade is between 25° and 35° to meet the requirements of the windward area of the blade.

[0021] To further facilitate the rotation of the impeller under the action of the airflow, the blade extends in the clockwise or counterclockwise direction from the first end to the second end.

[0022] The technical solution adopted by the utility model to solve the second technical problem is a cleaning machine, characterized by comprising a box body and the above-mentioned air inlet assembly, the air inlet pipe is arranged on the outer wall surface of the box body, and the air outlet of the air inlet pipe is in communication with the washing cavity of the box body.

[0023] Compared with the prior art, the utility model discloses the advantages: the utility model discloses the impeller is set up in the air outlet, the air inlet direction of the washing cavity of the cleaning machine is changed when the impeller rotates, first, the airflow will not backflow, second, the airflow is diffused to all directions by the rotation of the impeller, and the tableware coverage area of the airflow is increased, and the utility model discloses the blade is inclined to set, so that one of the wall surfaces of the blade is as the windward surface, when the airflow impacts the windward surface of the blade, will drive the rotation of the impeller, i.e. the rotation of the impeller under the action of the airflow diffuses the airflow, need not set up the drive structure of the drive impeller rotation, and the structure is simple, and the blade is inclined to set, and the diffusion effect of the airflow is good, and the coverage area of the airflow is large. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic diagram of another direction of the utility model embodiment 1;

[0025] Figure 2 It is the structure schematic diagram of another direction of the utility model embodiment 1; Figure 1

[0026] Figure 3 It is the structure schematic diagram of another direction of the utility model embodiment 1; Figure 1

[0027] Figure 4 It is the structure schematic diagram of another direction of the utility model embodiment 1; Figure 3

[0028] Figure 5 It is the structure schematic diagram of another direction of the utility model embodiment 1; Figure 2

[0029] Figure 6 It is the structure schematic diagram of another direction of the utility model embodiment 1; Figure 5

[0030] Figure 7 It is the structure schematic diagram of another direction of the utility model embodiment 1; Figure 6

[0031] Figure 8 It is the structure schematic diagram of another direction of the utility model embodiment 1; Figure 7

[0032] Figure 9 It is the structure schematic diagram of another direction of the utility model embodiment 1;

[0033] Figure 10 It is the structure schematic diagram of another direction of the utility model embodiment 1;

[0034] Figure 11 It is the structure schematic diagram of another direction of the utility model embodiment 1;

[0035] Figure 12 It is the structure schematic diagram of another direction of the utility model embodiment 1; Figure 11

[0036] Figure 13 ​​​​​​​​For Figure 11 A sectional view of the middle impeller and the air outlet sleeve;

[0037] Figure 14 For Figure 11 A partial structural schematic view of the middle air inlet assembly;

[0038] Figure 15 A structural schematic view of the impeller of the embodiment 3 of the utility model;

[0039] Figure 16 For Figure 15 A structural schematic view of another direction. DETAILED DESCRIPTION

[0040] The utility model will be described further in detail below in combination with the embodiment of the drawings.

[0041] Embodiment 1

[0042] As Figures 1 to 10 shown, the cleaning machine of the preferred embodiment includes a box body 1 and an air inlet assembly, the air inlet assembly includes an air inlet pipe 2, a fan 3 and an impeller 4, the air inlet pipe 2 is arranged on the outer wall surface of the box body 1, and the air inlet pipe 2 is provided with an air inlet 21 and an air outlet 22 which are in communication with the inside of the air inlet pipe 2.

[0043] The air outlet 22 is in communication with the washing cavity 11 of the cleaning machine, and the communication is realized in the following manner: as Figure 4 shown, the air inlet pipe 2 is arranged on the outer wall surface of the box body 1, the air inlet pipe 2 is provided with an air outlet sleeve 5, the air outlet sleeve 5 is arranged in the air outlet 22 and the center lines of the two are parallel or coincide, and the air outlet sleeve 5 is screwed in the air outlet 22.

[0044] A through hole 11 is arranged on the side wall of the box body 1, the air outlet sleeve 5 partially penetrates the through hole 11, and the end of the air outlet sleeve 5 extending into the box body 1 extends outward to form a pressing part 51, and the side wall of the box body 1 located around the through hole 11 is pressed between the pressing part 51 and the air inlet pipe 2. Of course, in order to reduce air leakage and reduce the wear of the side wall of the box body 1, a sealing ring 52 is arranged between the pressing part 51 and the box body 1 and / or between the air inlet pipe 2 and the box body 1.

[0045] The fan 3 is used to drive the airflow to flow from the air inlet 21 to the air outlet 22, and the fan 3 can adopt the existing structure, the air inlet of the fan 3 is in communication with the outside, and the air outlet of the fan 3 is in communication with the air inlet 21 of the air inlet pipe 2.

[0046] The impeller 4 includes a mounting shaft 41, a flow guide ring 42 and a blade 43 arranged on the mounting shaft 41, and the mounting shaft 41 extends along the center line of the air outlet 22 and can rotate around the center line of the air outlet 22.

[0047] In the embodiment, the mounting and rotation of the mounting shaft 41 are realized in the following manner:

[0048] As Figure 7 shown, the impeller 4 is rotatably located in the air outlet sleeve 5, i.e. the impeller 4 is rotatably arranged in the air outlet 22, the central part of the air outlet sleeve 5 is provided with a mounting seat 53, and the two are connected through a connecting rib 54, the connecting rib 54 has one or at least two spaced apart along the circumference of the mounting seat 53. The design of the connecting rib 54 will not have a greater impact on the flow of air, in the embodiment, the connecting rib 54 has three evenly distributed along the circumference of the mounting seat 53.

[0049] The mounting shaft 41 is inserted and assembled with the mounting seat 53, the mounting seat 53 is provided with an insertion hole 531, the bearing 6 is inserted and assembled in the insertion hole 531, the bearing 6 is fixed in the axial direction relative to the insertion hole 531, the bearing 6 can rotate in the circumferential direction relative to the insertion hole 531, and the mounting shaft 41 is partially inserted and assembled in the bearing 6. The cooperation of the mounting shaft 41, the insertion hole 531 and the bearing 6 is a prior art, which will not be described here, and the bearing 6 adopts the existing structure.

[0050] In order to fix the mounting shaft 41 in the axial direction relative to the bearing 6, the first clamping leg 411 and the first limiting block 412 are spaced apart along the axial direction of the mounting shaft 41, the first clamping leg 411 and the first limiting block 412 are respectively abutted with the opposite two wall surfaces of the bearing 6, and the first clamping leg 411 and the first limiting block 412 jointly constitute a limiting structure.

[0051] The blade 43 has multiple pieces and is spaced apart along the circumferential direction of the mounting shaft 41, one end of each blade 43 is connected with the mounting shaft 41, the other end extends away from the mounting shaft 41, and at least one of the blades 43 is inclined relative to the axial direction of the mounting shaft 41, so that one of the wall surfaces of the blade 43 faces the wind direction as a windward surface. In the embodiment, all the blades 43 are inclined relative to the axial direction of the mounting shaft 41 and have the same inclination angle. In this way, all the blades 43 have windward surfaces that can be impacted by the airflow, and the impeller 4 receives a larger force to drive the impeller 4 to rotate, and all the blades 43 are under stress, which also makes the impeller 4 balanced and rotates stably.

[0052] The inclination angle of the blade 43 has a requirement, based on the wind speed and driving force, the wind power needs to overcome the friction force received by the mounting shaft 41 of the impeller 4, but the driving force cannot be too large, the larger the driving force means the larger the windward area of the blade 43, the greater the loss of wind speed, which is also not conducive to diffusion in the cavity, therefore the inclination angle of the blade 43 is between 25° and 45°.

[0053] In addition, the number of the blades 43 is odd and evenly distributed along the circumference of the mounting shaft 41. If the number of the blades 43 is even and evenly distributed along the circumference, the driving torque on the blades 43 is inversely symmetrical, resulting in the force being cancelled out and the blades 43 being unable to be driven. If the blades 43 are unevenly distributed along the circumference, the force is unevenly distributed, the driving efficiency is low, and the blades 43 can be stuck.

[0054] The flow guide ring 42 has one and is connected to the other end of the blade 43, or the flow guide ring 42 has at least two and is sequentially and spacedly arranged along the radial direction of the mounting shaft 41, each blade 43 passes through the inner flow guide ring 42 and is connected to the inner wall surface of the outermost flow guide ring 42 from inside to outside, and each flow guide ring 42 is conical along the flow direction of the airflow and gradually expands in diameter. In the embodiment, the taper of each flow guide ring 42 is between 30° and 40°.

[0055] Under the driving of the impeller 4, the airflow is centrifuged, so that the air inlet coverage area is larger. The purpose of the flow guide ring 42 is to make the airflow have a larger circumferential diffusion range, so as to improve the coverage area of the tableware. Another function of the flow guide ring 42 is to reduce the backflow of the air inlet encountering the tableware, so as to cause the flow state to be disordered.

[0056] Through simulation and experimental test, compared with the existing fixed air inlet mode, the air inlet coverage area of the embodiment can be improved by 18% to 26%, and a simulation schematic diagram is shown in Figure 9 、 10 .

[0057] Embodiment 2

[0058] As shown in Figures 11 to 14 , the difference between embodiment 2 and embodiment 1 is that the application does not set a bearing, so that the friction between the mounting shaft 41 and the mounting seat 53 is larger, and the driving force required is larger. The larger driving force requires a larger windward area, but it is not conducive to the loss of wind speed.

[0059] As shown in Figure 14 , the embodiment is provided with a flow guide rib 23 in the air inlet pipe 2 at a position adjacent to the air outlet 22. Along the flow direction of the airflow, the included angle between the extension line L1 of the downstream end of the flow guide rib 23 and the horizontal line L2 passing through the center line of the air outlet 22 is α, and 45°≤α≤60°. The flow guide rib 23 plays a role of pre-rotating the airflow, allowing the airflow to blow in from one side of the impeller 4, which increases the driving force near the impeller 4 and increases the driving torque. Thus, when the airflow enters, a certain thrust is generated on the blade 43, so that the impeller 4 rotates.

[0060] The direction of the airflow flowing in the air inlet pipe 2 is the length direction, and the width direction is perpendicular to the length direction. The flow guide rib 23 has multiple flow guide ribs and is spacedly arranged along the width direction of the air inlet pipe 2.

[0061] Of course, the guide rib 23 can also be designed in the air inlet pipe 2 of embodiment 1.

[0062] In this embodiment, the tilt angle θ of the blade 43 is between 25° and 45°.

[0063] In this embodiment, the assembly between the mounting shaft 41 and the mounting base 43 is as follows: Figure 13 As shown: The mounting base 53 is provided with a socket 531. The mounting shaft 41 is partially rotatably inserted into the socket 531. The mounting base 53 has an upstream end face and a downstream end face arranged sequentially along the airflow direction. The upstream end face and the downstream end face are arranged opposite to each other. The mounting shaft 41 is provided with a second retaining foot 413 and a second limiting block 414 spaced apart along its axial direction. When the mounting shaft 41 is inserted into the socket 531, the second retaining foot 413 is upside down and holds the upstream end face of the mounting base 53. The second limiting block 414 abuts against the downstream end face of the mounting base 53. The second retaining foot 413 and the second limiting block 414 together constitute a limiting structure.

[0064] Compared to existing fixed air intake methods, this embodiment can increase the air intake coverage area by 18% to 26%.

[0065] Example 3

[0066] like Figure 15 , 16 As shown, the difference between Example 3 and Example 1 is that the shape of the blade 43 in this example is different from that in Example 1.

[0067] In this embodiment, the wall surface of blade 43 facing the airflow is called the windward surface. The end of blade 43 connected to the mounting shaft 41 is the first end, and the other end of blade 43 is the second end. The windward surface area of ​​blade 43 increases from the first end to the second end. Blade 43 extends clockwise or counterclockwise from the first end to the second end to further facilitate the rotation of impeller 4 under the action of airflow. Wind-driven operation needs to overcome the friction of bearing 6. The greater the driving force of a normal blade shape, the larger the windward area of ​​blade 43, the greater the wind speed loss, and the less conducive it is to the diffusion of airflow in the washing chamber 11 of the cleaning machine. The wind speed at the air outlet 22 can be considered basically uniform. Therefore, the torque is greater at the position farther away from the center of mounting shaft 41 (i.e., the outer side). Thus, the benefit of increasing the windward area on the outer side of blade 43 is much higher than that of increasing the windward area at the center of mounting shaft 41. Therefore, the windward area is reduced at the position close to the center of mounting shaft 41, and the windward area is increased at the position far away from the center of mounting shaft 41.

[0068] In this embodiment, the expression for the blade profile 43 is: r is the outer diameter of the mounting shaft 41, and R is the overall outer diameter of the impeller 4.

[0069] The inclination angle of the blade 43 is between 20° and 35°, the whole windward area of the blade 43 can be reduced by 22% compared with the straight blade 43 (such as the blades in the above embodiments 1 and 2), and the three blades 43 can realize the driving effect of the original five blades 43, and the driving efficiency is improved by 40%.

[0070] The air inlet pipe of each of the above embodiments is at least partially formed by two half shells, Figure 5 and Figure 14 are schematic views of the air inlet assembly after one of the half shells is removed.

[0071] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and since the embodiments disclosed in the present application can be arranged in different directions, these terms indicating the direction are only as an illustration and should not be regarded as a limitation, such as "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

Claims

1. An air inlet assembly for a washing machine, comprising an air inlet pipe (2) having an air inlet opening (21) and an air outlet opening (22) formed therein and communicating with the interior of the air inlet pipe (2), the air outlet opening (22) being configured to communicate with a washing chamber of the washing machine; a fan (3) configured to drive air flow from the air inlet opening (21) to the air outlet opening (22); characterized in that further comprising a vane wheel (4) having a mounting shaft (41) extending along and rotatable about a center line of the air outlet opening (22), and a plurality of vanes (43) spaced apart along the circumference of the mounting shaft (41), each vane (43) having one end connected to the mounting shaft (41) and the other end extending away from the mounting shaft (41), at least one of the vanes (43) being inclined relative to the axial direction of the mounting shaft (41) so that one wall surface of the vane (43) faces the direction of air flow as a windward surface.

2. The air intake assembly of claim 1, wherein: All of the vanes (43) are inclined relative to the axial direction of the mounting shaft (41) and have the same inclination angle.

3. The air intake assembly of claim 2, wherein: The inclination angle of the vanes (43) is between 25° and 45°.

4. The air intake assembly of claim 2, wherein: The number of the vanes (43) is odd and evenly distributed along the circumference of the mounting shaft (41).

5. The air intake assembly of claim 1, wherein: The vane wheel (4) further comprises a guide ring (42), which is one and connected to the other end of the vane (43), or which is at least two and spaced apart along the radial direction of the mounting shaft (41), each of the vanes (43) passing through the inner wall surface of the innermost guide ring (42) and the outermost guide ring (42) from inside to outside. The guide ring (42) is tapered along the direction of air flow.

6. The air intake assembly of claim 5, wherein: The taper of each guide ring (42) is between 30° and 40°.

7. The air intake assembly of any of claims 1-6, wherein: The air inlet pipe (2) is provided with a guide rib (23) adjacent to the air outlet opening (22), and the included angle between the extension line of the downstream end of the guide rib (23) and the horizontal line passing through the center line of the air outlet opening (22) is α, 45°≤α≤60°.

8. The air intake assembly of any of claims 1, 2, 4, 5, 6, wherein: The end of the vane (43) connected to the mounting shaft (41) is the first end, and the other end of the vane (43) is the second end, and the area of the windward surface of the vane (43) increases from the first end to the second end.

9. The air intake assembly of claim 8, wherein: The inclination angle of the vane (43) is between 25° and 35°.

10. The air intake assembly of claim 8, wherein: The vane (43) rotates and extends in the clockwise or counterclockwise direction from the first end to the second end.

11. The air intake assembly of claim 8, wherein: The expression of the profile of the blade (43) is: r is the outer diameter of the mounting shaft (41) of the vane wheel (4), and R is the outer diameter of the vane wheel (4).

12. A cleaning machine characterized by, The air inlet assembly of any one of claims 1-11 is arranged on the outer wall surface of a cabinet (1), and the air outlet opening (22) of the air inlet pipe (2) communicates with a washing chamber (11) of the cabinet (1).

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