Air inlet assembly for cleaning machine and cleaning machine

Abstract

The utility model relates to an air inlet assembly used for a cleaning machine and the cleaning machine, the air inlet assembly comprises an air inlet pipe, and the air inlet pipe is provided with an air inlet used for being communicated with the outside and an air outlet used for being communicated with a washing cavity of the cleaning machine; the heating piece is arranged in the air inlet pipe; in the airflow flowing direction, the upstream end of the heating part is arched towards the airflow direction to form an arched structure, gaps are formed between the two opposite side walls of the heating part and the inner wall face of the corresponding side of the air inlet pipe to form air passing channels, and the two side walls of the arched structure are correspondingly connected with the air passing channels respectively. In this way, the impact loss caused by the fact that airflow directly blows a flat plate of the heating piece is reduced, gaps are formed between the two opposite side walls of the heating piece and the inner wall face of the corresponding side of the air inlet pipe to form the air passing channels, the airflow passing through the heating piece can be divided into two paths to enter the two air passing channels respectively, the airflow flows smoothly, and the loss is small.

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. Hot airflow is input into the washing cavity through the drying assembly 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 pipe, a heating element, and a second airflow driving member. The air inlet pipe 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 pipe. The second airflow driving member is used to drive the airflow from the outside world through the air inlet pipe 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 pipe. 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 pipe and located on the airflow flow path from the second air inlet to the second air outlet. After the airflow entering the air inlet pipe 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 pipe 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. This also causes the speed of the hot air entering the washing cavity to decrease rapidly. Only the pressure gradient can slowly cover the tableware, and the drying efficiency is not high.

[0006] In addition, because the heating element is a solid block, the airflow will form a flat impact when passing through, causing a speed loss. UTILITY MODEL CONTENTS

[0007] The first technical problem to be solved by the utility model is to provide an air inlet assembly for a cleaning machine with small wind speed loss in view of the current status of the prior art.

[0008] The second technical problem to be solved by the utility model is to provide an air inlet assembly with large air flow coverage for a cleaning machine.

[0009] The third technical problem to be solved by the utility model is to provide a cleaning machine using the air inlet assembly.

[0010] The technical scheme adopted by the utility model to solve the first technical problem is: an air inlet assembly for a cleaning machine, comprising

[0011] An air inlet pipe is provided with an air inlet for communicating with the outside and an air outlet for communicating with a washing cavity of the cleaning machine;

[0012] A fan is used to drive air flow from the air inlet to the air outlet;

[0013] A heating element is arranged in the air inlet pipe;

[0014] The features are that: along the air flow direction, the upstream end of the heating element is arched to form an arch structure against the air flow direction, there is a spacing between the two opposite side walls of the heating element and the inner wall surface of the corresponding side of the air inlet pipe to form an air passage, and the two side walls of the arch structure are respectively connected to an air passage.

[0015] In the above scheme, the cross-sectional area of the arch structure is triangular or arc-shaped.

[0016] Preferably, the top angle of the arch structure is between 35-55°, which can reduce the speed loss by about 15%.

[0017] Because the temperature of the heating element is the highest, in order to prevent the air inlet pipe from being deformed by heat, the inner wall surface of the air inlet pipe is provided with a heat dissipation element in the air passage, which reduces the heat received by the air inlet pipe.

[0018] In the above scheme, the air inlet pipe is provided with a wire hole for the electric wire connected with the heating element to pass through, a glue injection hole is arranged adjacent to the wire hole, and the wire hole is sealed by injecting glue into the glue injection hole after the heating element, the electric wire and the like are assembled, so as to prevent air leakage at the wire hole.

[0019] In the above scheme, the fan is arranged in the air inlet pipe, the air inlet of the fan is connected to the air inlet, the air outlet of the fan faces the heating element, the air inlet pipe is provided with a wire hole for the electric wire connected with the fan to pass through, and the air inlet pipe is provided with a glue injection hole at the wire hole, the wire hole is sealed by injecting glue into the glue injection hole after the heating element, the electric wire and the like are assembled, so as to prevent air leakage at the wire hole.

[0020] The utility model discloses a technical scheme that solves the second technical problem is as follows: the air outlet includes first air outlet and second air outlet, first air outlet is located the top of second air outlet, and is equipped with the impeller of rotatable in first air outlet, and the rotation axis of impeller extends along the center line of first air outlet.

[0021] The driving mechanism such as motor can be used to drive the rotation of the impeller, but this involves more components, is troublesome to install, and has high cost, so the impeller comprises a mounting shaft and blades provided on the mounting shaft, the mounting shaft extends along the center line of the first air outlet and can rotate around the center line of the first air outlet, the blades are spaced apart along the circumference of the mounting shaft, and at least one of the blades is inclined relative to the axial direction of the mounting shaft so that one wall of the blade serves as a windward surface. The airflow will impact the windward surface during flow, pushing the impeller to rotate.

[0022] In the above scheme, all the blades are inclined relative to the axial direction of the mounting shaft and have the same inclination angle, and the number of the blades is odd and uniformly distributed along the circumference of the mounting shaft. If the number of the blades is even and uniformly distributed along the circumference, the driving torques on the blades are inversely symmetrical, resulting in mutual cancellation of forces and inability to drive the blades. If the blades are not uniformly distributed along the circumference, the forces on the blades are uneven, the driving efficiency is low, and stalling may occur.

[0023] Preferably, the impeller further comprises a flow guide ring coaxially arranged with the mounting shaft and connected with the blades, and the flow guide ring is conical in shape and gradually expands in diameter along the flow direction of the airflow. The purpose of the flow guide ring is to make the airflow spread in a larger circumferential range and increase the coverage area of the tableware. Under the drive of the impeller, the airflow will be centrifuged, thereby increasing the coverage area of the airflow. Another function of the flow guide ring is to reduce the backflow of the airflow encountering the tableware, thereby preventing flow state disorder.

[0024] Preferably, a flow guide rib is arranged in the air inlet pipe adjacent to the first air outlet, and the included 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, and 45°≤α≤60°. The design of the flow guide rib is equivalent to making a pre-rotation design in the air inlet pipe in advance, allowing the air inlet to blow from one side of the impeller, which increases the driving force near the impeller and increases the driving torque. In this way, the mounting shaft can be driven with less loss of wind speed.

[0025] The utility model discloses a technical scheme that solves the third technical problem is as follows: a cleaning machine, it is characterized by including the box body with washing cavity and above-mentioned air inlet component, be equipped with with the air outlet intercommunication air inlet on the box body.

[0026] Compared with the prior art, the utility model have the advantages that: 1, the utility model discloses a heating piece's upstream end is designed as arch structure, like this reduces the airflow straight blow heating piece's flat plate impact loss, and the utility model heating piece's two opposite side walls with the inner wall surface between the corresponding side of air inlet pipe all have spacing and form the wind channel, the airflow that passes heating piece will be divided into two roads respectively enters two wind channels, airflow flows smoothly, and the loss is small.

[0027] 2, the utility model discloses a first air outlet in the upper portion sets up the impeller, and the impeller can increase the disturbance of airflow and the coverage area of airflow when rotating, because heat mainly gathers in the upper portion of the cleaning machine, therefore needs to make its uniformity a little better to the big disturbance, the second air outlet of lower portion adopts the form of fixed air outlet, is in order to let the air outlet more concentrate lower portion, then the process of flowing upward carries out the drying of large tableware in a large range. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the structure schematic drawing of the embodiment of the utility model;

[0029] Figure 2 It is Figure 1 the structure schematic drawing of the structure schematic drawing of removing door body;

[0030] Figure 3 It is Figure 2 the structure schematic drawing of the air inlet assembly of

[0031] Figure 4 It is Figure 3 the structure schematic drawing of another direction of

[0032] Figure 5 It is Figure 4 the exploded view of

[0033] Figure 6 It is Figure 4 the structure schematic drawing of removing one of the half shell of

[0034] Figure 7 It is Figure 4 the sectional view of DETAILED DESCRIPTION

[0035] The utility model will be further described in detail below in combination with the drawings embodiment.

[0036] As Figures 1 to 7 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 a heating element 4.

[0037] The air inlet pipe 2 is provided with an air inlet 21 for communicating with the outside and an air outlet for communicating with the washing cavity 11 of the washing machine. The fan 3 is used to drive the airflow to flow from the air inlet 21 to the air outlet. In the embodiment, the fan 3 can adopt the existing structure. The fan 3 is arranged in the air inlet pipe 2. The air inlet of the fan 3 corresponds to the air inlet 21. The air outlet of the fan 3 faces the heating element 4, i.e. the heating element 4 is arranged downstream of the fan 3. The heating element 4 can adopt the existing PTC heating element 4.

[0038] As shown in Figure 7 the airflow direction, the upstream end of the heating element 4 is arched towards the airflow direction to form an arch structure 41. The two opposite side walls of the heating element 4 are spaced apart from the inner wall of the corresponding side of the air inlet pipe 2 to form an airflow passage 42. The two side walls of the arch structure 41 correspond to one airflow passage 42 respectively. In this way, the airflow directly blowing on the flat plate of the heating element 4 is reduced. The airflow passing through the heating element 4 is divided into two paths to enter the two airflow passages 42 respectively. The airflow flows smoothly and the loss is small.

[0039] The cross-sectional area of the arch structure 41 is triangular or arc-shaped. In the embodiment, the cross-sectional area is triangular. The top angle of the arch structure 41 is between 35° and 55°. According to experimental tests, the speed loss can be reduced by about 15%.

[0040] Because the temperature of the heating element 4 is the highest, in order to prevent the air inlet pipe 2 from being deformed by heat, the inner wall of the air inlet pipe 2 is provided with a heat dissipation element 43 located in the airflow passage 42. The heat dissipation element 43 reduces the heat received by the air inlet pipe 2. The heat dissipation element 43 can adopt the existing structure.

[0041] In order to prevent the air inlet pipe 2 from leaking, the following parts prone to leakage are sealed:

[0042] 1. As shown in Figure 6 the air inlet pipe 2 is provided with a wire hole for the wire connected to the heating element 4 to pass through. The air inlet pipe 2 is provided with a glue injection hole adjacent to the wire hole. After the heating element 4 and the wire are assembled, the wire hole is sealed by injecting glue into the glue injection hole to prevent air leakage at the wire hole.

[0043] 2. The air inlet pipe 2 is provided with a wire hole for the wire connected to the fan 3 to pass through. The air inlet pipe 2 is provided with a glue injection hole adjacent to the wire hole. After the heating element 4 and the wire are assembled, the wire hole is sealed by injecting glue into the glue injection hole to prevent air leakage at the wire hole.

[0044] 3. In order to facilitate the arrangement of the fan 3, the heating element 4 and the like in the air inlet pipe 2, the air inlet pipe 2 is formed by two half shells 20 which are closed. The two half shells are welded together, which is firm and has good tightness.

[0045] Through the above design, the closed flow channel is formed inside the air inlet pipe 2, and the closed flow channel has the advantage of good pressure maintaining effect inside the flow channel, and the flow of the fan is all left inside the air duct.

[0046] The air outlet includes a first air outlet 25 and a second air outlet 26, the first air outlet 25 is located above the second air outlet 26, the cabinet 1 is provided with a first air inlet 12 communicated with the first air outlet 25 and a second air inlet 13 communicated with the second air outlet 26, the second air outlet 26 has at least two and is arranged in transverse direction, and the air inlet 21 is located between the first air outlet 25 and the second air outlet 26 in vertical direction. In the embodiment, the second air outlet 26 has two.

[0047] As shown in Figure 4 , 5 , 6, the first air outlet 25 is provided with an impeller 5, and the impeller 5 can rotate around the center line of the first air outlet 25.

[0048] The impeller 5 includes a flow guide ring 51, a mounting shaft 52 and blades 53 provided on the mounting shaft 52, the central part of the first air outlet 25 has a mounting seat 27 for the mounting shaft 52 to be rotatably mounted thereon, and the mounting seat 27 is connected with the first air outlet 25 through a connecting rib 28.

[0049] The mounting shaft 52 extends along the center line of the first air outlet 25 and can rotate around the center line of the first air outlet 25, the blades 53 are a plurality of and are arranged in transverse direction of the mounting shaft 52, at least one of the blades 53 is inclined relative to the axial direction of the mounting shaft 52, in the embodiment, all the blades 53 are inclined relative to the axial direction of the mounting shaft 52 and have the same inclination angle, so that one of the walls of the blades 53 serves as a windward surface. The windward surface is impacted by airflow during airflow flow, and the impeller 5 is driven to rotate.

[0050] The number of the blades 53 is odd and is uniformly distributed in the transverse direction of the mounting shaft 52. If the number of the blades 53 is even and is uniformly distributed in the transverse direction, the driving torque on the blades 53 is reverse symmetric, resulting in that the forces are offset to each other and the blades 53 cannot be driven. If the blades 53 are not uniformly distributed in the transverse direction, the forces are uneven, the driving efficiency is low, and the blades 53 can be stuck.

[0051] The guide ring 51 is coaxially arranged with the mounting shaft 52 and connected with the blades 53, the guide ring 51 can be one, the outer end of each blade 53 is connected with the inner wall surface of the guide ring 51, or the guide ring 51 has at least two and is sequentially and spacedly arranged along the radial direction of the mounting shaft 52, each blade 53 is connected with the inner wall surface of the outermost guide ring 51 by penetrating the inner guide ring 51 from inside to outside, and each guide ring 51 is conical and gradually expands in the flow direction of the airflow. The purpose of the guide ring 51 is to make the circumferential diffusion range of the airflow larger, and to improve the coverage area of the tableware. Under the driving of the impeller 5, the airflow is centrifuged, so that the coverage area of the airflow is larger. Another effect of the guide ring 51 is to reduce the backflow of the airflow encountering the tableware, so as to cause flow state disorder.

[0052] The guide rib 29 is arranged in the air inlet pipe 2 and adjacent to the first air outlet 25, and the included angle between the extension line of the downstream end of the guide rib 29 and the horizontal line passing through the center line of the air outlet is α, 45°≤α≤60° in the flow direction of the airflow. The design of the guide rib 29 is equivalent to making a pre-rotation design in the air inlet pipe 2, so that the air inlet is blown into the impeller 5 from one side, which increases the driving force near the outer side and increases the driving torque, and the installation shaft 52 can be driven under the condition that the wind speed loss is small.

[0053] By using the air inlet assembly of the embodiment, the disturbance of the airflow and the coverage area of the airflow can be increased when the impeller 5 rotates. Because heat mainly gathers in the upper part of the cleaning machine, it is necessary to disturb the heat greatly to make the heat more uniform. The second air outlet 26 in the lower part adopts a fixed air outlet form, so that more air is concentrated in the lower part, and then flows upward to dry the tableware in a large range.

[0054] In the description of the present application, it should be understood that the orientations or positional relationships indicated by 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 are based on the orientations or positional relationships 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, since the embodiments disclosed in the present application can be arranged in different directions, so these orientation indicating terms are only as an illustration and should not be regarded as a limitation. For example, "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 (21) for communicating with the outside and an air outlet for communicating with a washing chamber (11) of the washing machine; a fan (3) for driving air flow from the air inlet (21) to the air outlet; a heating element (4) arranged in the air inlet pipe (2); characterized in that an upstream end of the heating element (4) is arched towards the air flow direction to form an arch structure (41), and two side walls of the heating element (4) are spaced apart from the inner wall of the corresponding side of the air inlet pipe (2) to form an air passage (42), and the two side walls of the arch structure (41) are respectively connected to one air passage (42).

2. The air intake assembly of claim 1, wherein: The cross-sectional area of the arch structure (41) is triangular or arc-shaped.

3. The air intake assembly of claim 2, wherein: The top angle of the arch structure (41) is between 35-55°.

4. The air intake assembly of claim 1, wherein: The inner wall of the air inlet pipe (2) is provided with a heat dissipation element (43) located in the air passage (42).

5. The air intake assembly of claim 1, wherein: The air inlet pipe (2) is provided with a wire hole (23) for the electric wire connected to the heating element (4) to pass through, and a glue injection hole (24) is arranged adjacent to the wire hole (23); The fan (3) is arranged in the air inlet pipe (2), the air inlet of the fan (3) is connected to the air inlet (21), and the air outlet of the fan (3) is directed to the heating element (4), the air inlet pipe (2) is provided with a wire hole for the electric wire connected to the fan (3) to pass through, and the air inlet pipe (2) is provided with a glue injection hole at the wire hole.

6. The air intake assembly of any one of claims 1-5, wherein: The air outlet comprises a first air outlet (25) and a second air outlet (26), the first air outlet (25) is located above the second air outlet (26), and a rotatable impeller (5) is arranged in the first air outlet (25), and the rotation axis of the impeller (5) extends along the center line of the first air outlet (25).

7. The air intake assembly of claim 6, wherein: The impeller (5) comprises a mounting shaft (52) and blades (53) arranged on the mounting shaft (52), the mounting shaft (52) extends along the center line of the first air outlet (25) and can rotate around the center line of the first air outlet (25), the blades (53) are arranged in a plurality of circumferential intervals on the mounting shaft (52), and at least one of the blades (53) is inclined relative to the axial direction of the mounting shaft (52) so that one wall surface of the blade (53) serves as a windward surface.

8. The air intake assembly of claim 7, wherein: All the blades (53) are inclined relative to the axial direction of the mounting shaft (52) and have the same inclination angle, the number of the blades (53) is odd and evenly distributed along the circumference of the mounting shaft (52).

9. The air intake assembly of claim 7, wherein: The impeller (5) further comprises a flow guide ring (51) coaxially arranged with the mounting shaft (52) and connected to the blades (53), and the flow guide ring (51) is tapered and gradually expands in diameter along the direction of the air flow.

10. A cleaning machine characterized by, The box (1) having a washing chamber (11) and the air inlet assembly according to any one of claims 1-9, the box (1) is provided with an air inlet connected to the air outlet.

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