Dish washing machine

Abstract

The dish-washing machine comprises a box body, the front side of the box body is open, and an air inlet hole is formed in the side wall of the box body; the door body is arranged on the front side of the box body and used for opening and closing the box body, when the door body is in a closed state, a washing cavity is defined by the door body and the box body, and an air outlet capable of being communicated with the washing cavity is formed in the door body; the hot air assembly is used for introducing hot air flow into the washing cavity from the air inlet hole; the air exhaust assembly is arranged on the door body and used for exhausting airflow entering from the air exhaust opening; the air inlet holes are formed in the left side wall and the right side wall of the box body, the air inlet holes are formed in the upper portion and the lower portion of the left side wall and / or the right side wall of the box body, an impeller is arranged at the position of at least one air inlet hole located in the upper portion, the impeller rotates relative to the corresponding air inlet hole, and the rotating axis extends along the center line of the corresponding air inlet hole. According to the dish-washing machine, multiple air inlets are matched with the air exhaust assembly, the layout is more reasonable, and the internal flow field and the temperature field are more uniform.

Description

Technical Field

[0001] This utility model relates to a dishwasher. Background Technology

[0002] A dishwasher is a device that sprays cold or hot water onto dishes to remove dirt and grime from plates, dishes, fruits, and vegetables, and washes them. The widespread use of dishwashers has greatly improved the convenience of dishwashing. At the end of the wash cycle, the dishes need to be dried, so dishwashers are equipped with hot air and exhaust fans.

[0003] For example, the Chinese invention patent application with patent number CN202210778760.X (publication number CN115067849A) discloses a drying device for a cleaning machine and a drying control method thereof. The cleaning machine has an exhaust assembly installed on the inner door and a hot air assembly installed on the side wall of the cavity. The hot air assembly has a heating element and a blower fan installed in the hot air channel, and the exhaust assembly has an exhaust fan installed in the exhaust channel.

[0004] As shown in the aforementioned patent, existing dishwashers typically rely on a final water rinse to heat the dishes before drying. If users have a small amount of dishes, they may hand-wash them before putting them in the dishwasher. If hand-washed dishes are rinsed again and then heated, it will consume a lot of water and electricity. If the dishes are dried directly without preheating them, the drying efficiency will be poor. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a dishwasher that dries tableware without washing or heating it, based on the current state of the technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a dishwasher, comprising...

[0007] The enclosure has an open front, and air inlets are provided on the side walls of the enclosure.

[0008] The door is located on the front side of the cabinet and is used to open and close the cabinet. When the door is closed, the door and the cabinet form a washing chamber. The door is provided with an exhaust vent that can communicate with the washing chamber.

[0009] A hot air assembly is used to introduce hot airflow into the washing chamber through the air inlet.

[0010] An exhaust assembly, located on the door, is used to expel the airflow that enters through the exhaust vent.

[0011] The characteristic feature is that the air inlet is provided on both the left and right side walls of the box, and the air inlet is provided on the upper and lower parts of the left side wall and / or the right side wall of the box, and an impeller is provided at at least one of the upper air inlets, the impeller rotates relative to the corresponding air inlet and the axis of rotation extends along the center line of the corresponding air inlet.

[0012] The air inlet located on one of the left and right side walls of the enclosure is called the first air inlet, and the air inlet located on the other side wall of the enclosure is called the second air inlet.

[0013] To facilitate the introduction of hot air into multiple air inlets, the hot air assembly includes a first hot air assembly and a second hot air assembly;

[0014] The first hot air assembly includes a first air inlet pipe, which has a first air inlet and a first air outlet. The first air inlet pipe is provided with a first heating element and a first fan for driving airflow from the first air inlet to the first air outlet. The first air inlet is connected to the outside, and the first air outlet is connected to the first air inlet hole. The number of first air outlets is the same as the number of first air inlets and they are connected in a one-to-one correspondence.

[0015] The second hot air assembly includes a second air inlet pipe, which has a second air inlet port connected to the outside and a second air outlet port connected to the second air inlet hole. The second air inlet pipe is provided with a second heating element and a second fan for driving airflow from the second air inlet port to the second air outlet port. The number of first air outlet ports is the same as the number of first air inlet holes and they are connected in a one-to-one correspondence.

[0016] Preferably, when the second fan is operating, the second air inlet is located downstream of the second air outlet; when the second fan is not operating, the second air inlet is located upstream of the second air outlet. In this way, the second air inlet can both intake and exhaust air, serving multiple purposes.

[0017] Preferably, the second air inlet faces and is adjacent to the side wall of the housing, so that when the second fan is not working, the moisture in the washing chamber will be discharged from the second air inlet. Because the side wall of the housing is at a higher temperature, it can prevent the moisture from condensing into condensate on the side wall of the housing.

[0018] In the above scheme, the exhaust assembly includes an exhaust pipe and an exhaust fan disposed in the exhaust pipe, and the exhaust pipe is provided with an air inlet that is connected to the exhaust port.

[0019] Preferably, the part of the air duct in the exhaust pipe that connects to the air inlet has an inverted U-shaped structure. The top periphery of the air inlet is provided with a flow straightening rib. The flow straightening rib is inclined from top to bottom. The function of the flow straightening rib is to draw and straighten the air, and to prevent water from splashing into the air duct during cleaning.

[0020] To prevent water splashed into the air duct from flowing downstream and overflowing from the exhaust port of the exhaust pipe, a water-blocking rib is provided on the side of the air inlet in the exhaust pipe. The water-blocking rib extends vertically and is located between the two arms of the inverted U-shaped structure.

[0021] In the above scheme, the exhaust pipe has a housing cavity for accommodating the exhaust fan. The housing cavity divides the interior of the exhaust pipe into an upstream flow channel and a downstream flow channel. Both the upstream and downstream flow channels are connected to the housing cavity. The bottom wall of the housing cavity is provided with a drain hole for condensate to be discharged, which is connected to the downstream flow channel, so as to prevent condensate from accumulating in the housing cavity and corroding the exhaust fan. After the condensate is discharged to the downstream flow channel, it will be dried by the airflow.

[0022] To improve exhaust efficiency, the cross-sectional area of ​​the downstream end of the exhaust duct is increased along the airflow direction, which makes the airflow smooth and reduces the wind speed during the exhaust process. Under low wind speed conditions, the flow path of the airflow after exiting the exhaust duct will be shortened, which can effectively reduce the formation of condensation on the ground by high humidity airflow. In addition, it can avoid the risk of scalding to users by high humidity airflow.

[0023] Preferably, the downstream end of the exhaust pipe is provided with a guide rib to further ensure that the airflow is fully discharged.

[0024] A drive mechanism such as a motor can be used to drive the impeller to rotate, but this involves many components, is complicated to install, and is costly. Therefore, the impeller includes a mounting shaft and blades mounted on the mounting shaft. The mounting shaft extends along the centerline of the air outlet and can rotate around the centerline of the air outlet. Multiple blades are arranged circumferentially around the mounting shaft, with at least one blade inclined relative to the axial direction of the mounting shaft, so that one of the blade's surfaces serves as the windward side. During airflow, the air impacts the windward side, driving the impeller to rotate.

[0025] In the above scheme, all blades are tilted axially relative to the mounting shaft at the same angle, and the number of blades is odd and they are evenly distributed circumferentially along the mounting shaft. If the number of blades is even and evenly distributed circumferentially, the driving torques on the blades are opposite and symmetrical, causing the forces to cancel each other out and making it impossible to drive the blades. If the blades are not evenly distributed circumferentially, it will lead to uneven force distribution, low driving efficiency, and may also cause jamming.

[0026] Preferably, the impeller further includes a guide ring, which is coaxially arranged with the mounting shaft and connected to the blades. There can be one guide ring, with the outer end of each blade connected to the inner wall of the guide ring. Alternatively, there can be at least two guide rings arranged radially at intervals along the mounting shaft. Each blade passes through the inner guide ring from the inside out and connects to the inner wall of the outermost guide ring. Each guide ring is a tapered shape with a gradually expanding diameter along the airflow direction. The purpose of the guide ring is to increase the circumferential diffusion range of the airflow, thereby increasing the coverage area of ​​the tableware. Driven by the impeller, the airflow is centrifuged, thus increasing the airflow coverage area. Another function of the guide ring is to reduce the backflow of airflow when it encounters tableware, thus preventing turbulence.

[0027] Compared with the prior art, the advantages of this utility model are as follows: This utility model has air inlets on both the left and right side walls, which allow hot airflow to enter the washing chamber. Air inlets are also provided on the upper and lower parts of the left and / or right side walls of the box, which makes the flow field uniform. At least one of the air inlets located at the top is provided with an impeller, which rotates relative to the air inlet and the axis of rotation extends along the center line of the corresponding air inlet, thereby disturbing the airflow and improving the uniformity of the airflow and the coverage area.

[0028] The dishwasher of this invention has a more reasonable layout and a more uniform internal flow field and temperature field through multiple air intakes and exhaust components. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure from another direction;

[0031] Figure 3 for Figure 1 A schematic diagram of the structure without the door;

[0032] Figure 4 for Figure 3 A schematic diagram of the structure from another direction;

[0033] Figure 5 for Figure 4 A schematic diagram of the structure of the first air intake component;

[0034] Figure 6 for Figure 5 A schematic diagram of the structure from another direction;

[0035] Figure 7 for Figure 6 A schematic diagram of the decomposition process;

[0036] Figure 8 for Figure 7A schematic diagram of the structure with one half of the shell removed;

[0037] Figure 9 for Figure 7 A sectional view;

[0038] Figure 10 for Figure 1 A schematic diagram of the door structure in the diagram;

[0039] Figure 11 for Figure 1 A schematic diagram of the exhaust duct of the exhaust component with one half of the shell removed;

[0040] Figure 12 for Figure 2 A schematic diagram of the structure of the second air inlet duct of the second air inlet assembly with one half of the shell removed. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] like Figures 1-2 As shown, the dishwasher of this preferred embodiment includes a cabinet 1, a door 2, an exhaust assembly 3, and an air intake assembly.

[0043] The front of the cabinet 1 is open, and the door 2 is rotatably located on the front of the cabinet 1 for opening and closing the cabinet 1. When the door 2 is closed, the door 2 and the cabinet 1 form a washing chamber.

[0044] Air inlets are provided on both the left and right side walls of the housing 1, and air inlets are also provided on the upper and lower parts of the left and / or right side walls of the housing 1. One of the air inlets on the left and right side walls of the housing 1 is referred to as the first air inlet 11, and the other air inlet on the left and right side walls of the housing 1 is referred to as the second air inlet 12. In this embodiment, the second air inlet 12 is provided at the lower part of the left side wall of the housing 1, and three first air inlets 11 are provided on the right side wall of the housing 1, with one first air inlet 11 located at the upper part of the housing 1 and the other two first air inlets 11 located at the lower part of the housing 1.

[0045] The hot air assembly is used to introduce hot air into the washing chamber through the air inlet. In this embodiment, the hot air assembly includes a first hot air assembly 4 and a second hot air assembly 5. The first hot air assembly 4 introduces hot air into the washing chamber through the first air inlet 11, and the second hot air assembly 5 introduces hot air into the washing chamber through the second air inlet 12.

[0046] like Figures 4-9As shown, the first hot air assembly 4 includes a first air inlet pipe 41, which is provided with a first air inlet 411 and a first air outlet 412. The first air inlet pipe 41 is provided with a first heating element 42 and a first fan 43 for driving airflow from the first air inlet 411 to the first air outlet 412. The first air inlet 411 is connected to the outside, and the first air outlet 412 is connected to the first air inlet hole 11. The number of first air outlets 412 is the same as the number of first air inlets 11 and they are connected one by one.

[0047] In this embodiment, there are three first air outlets 412, one at the top and two at the bottom. An impeller 6 is provided in the first air outlet 412 at the top of the first air inlet pipe 41. Since the first air outlet 412 and the first air inlet 11 are connected, the impeller 6 is also provided at the first air inlet 11.

[0048] like Figure 7 , 8 As shown, the impeller 6 includes a guide ring 61, a mounting shaft 62, and blades 63 disposed on the mounting shaft 62. The central part of the first air outlet 412 has a mounting seat 44 on which the mounting shaft 62 can be rotatably mounted. The mounting seat 44 is connected to the first air outlet 412 by a connecting rib 45.

[0049] The mounting shaft 62 extends along the centerline of the first air outlet 412 and can rotate around the centerline of the first air outlet 412. Multiple blades 63 are spaced apart circumferentially along the mounting shaft 62, with at least one blade 63 inclined relative to the axial direction of the mounting shaft 62, so that one of the blade 63's surfaces serves as the windward surface. During airflow, the airflow impacts the windward surface, driving the impeller 6 to rotate.

[0050] In this embodiment, all blades 63 are inclined at the same angle relative to the axial direction of the mounting shaft 62, and the number of blades 63 is odd and they are evenly distributed along the circumference of the mounting shaft 62. If the number of blades 63 is evenly distributed circumferentially, the driving torque on the blades 63 is opposite and symmetrical, resulting in mutual cancellation of forces and failure to drive the blades 63. If the blades 63 are not evenly distributed circumferentially, it will lead to uneven force distribution, low driving efficiency, and may also cause jamming.

[0051] The guide ring 61 is coaxially mounted with the mounting shaft 62 and connected to the blades 63. There can be one guide ring 61, with the outer end of each blade 63 connected to the inner wall of the guide ring 61. Alternatively, there can be at least two guide rings 61, arranged radially at intervals along the mounting shaft 62. Each blade 63 passes through the inner guide ring 61 from the inside out and connects to the inner wall of the outermost guide ring 61. Each guide ring 61 is a tapered shape with a gradually expanding diameter along the airflow direction. The purpose of the guide ring 61 is to increase the circumferential diffusion range of the airflow, thereby increasing the coverage area of ​​the tableware. Driven by the impeller 6, the airflow is centrifuged, thus increasing the airflow coverage area. Another function of the guide ring 61 is to reduce the backflow of airflow when it encounters tableware, thus preventing turbulence.

[0052] like Figure 12 As shown, the second hot air assembly 5 includes a second air inlet pipe 51. The second air inlet pipe 51 has a second air inlet communicating with the outside and a second air outlet 512 communicating with the second air inlet hole 12. The second air inlet pipe 51 is equipped with a second heating element and a second fan 53 for driving airflow from the second air inlet to the second air outlet 512. The number of second air outlets 512 is the same as the number of second air inlets 12 and they are connected one-to-one. In this embodiment, there is one second air outlet 512, and both the first heating element 42 and the second heating element can be existing PTC heating elements.

[0053] When the second fan 53 is operating, the second air inlet 12 is located downstream of the second air outlet 512; when the second fan 53 is not operating, the second air inlet 12 is located upstream of the second air outlet 512. Thus, the second air inlet 12 can not only intake air but also exhaust air, serving multiple purposes. Specifically, the second air inlet 12 acts as a breathing port, the second air inlet pipe 51 can be used as a respirator, and water flow channels can also be integrated inside.

[0054] The second air inlet faces and is adjacent to the side wall of the housing 1. When the second fan 53 is not working, the moisture in the washing chamber will be discharged from the second air inlet. Because the side wall of the housing 1 is at a higher temperature, it can prevent the moisture from condensing into condensate on the side wall of the housing 1.

[0055] like Figure 10 , 11 As shown, the exhaust assembly 3 is installed on the door 2 and is used to exhaust the airflow entering from the exhaust port 21. The exhaust assembly 3 includes an exhaust pipe 31 and an exhaust fan 32 installed in the exhaust pipe 31. The door 2 is provided with an exhaust port 21 that can communicate with the washing chamber, and the exhaust pipe 31 is provided with an air inlet 311 that is correspondingly connected to the exhaust port 21.

[0056] The section where the air duct inside the exhaust duct 31 connects to the air inlet 311 is an inverted U-shaped structure 312. A flow-rectifying rib 33 is provided at the top periphery of the air inlet 311, sloping downwards. The flow-rectifying rib 33 serves two purposes: firstly, to draw and rectify the airflow, and secondly, to prevent water from splashing into the air duct during cleaning. To prevent water splashed into the air duct from the air inlet 311 from flowing downstream and eventually overflowing from the exhaust port of the exhaust duct 31, a water-blocking rib 34 is provided beside the air inlet 311 in the exhaust duct 31. The water-blocking rib 34 extends vertically and is located between the two arms of the inverted U-shaped structure 312.

[0057] The exhaust duct 31 has a housing cavity 313 for accommodating the exhaust fan 32. The housing cavity 313 divides the interior of the exhaust duct 31 into an upstream flow channel 314 and a downstream flow channel 315. In this embodiment, the inverted U-shaped structure 312 is a part of the upstream flow channel 314. Both the upstream flow channel 314 and the downstream flow channel 315 are connected to the housing cavity 313. The bottom wall of the housing cavity 313 is provided with a drain hole 316 for condensate to be discharged, which is connected to the downstream flow channel 315, to prevent condensate from accumulating in the housing cavity 313 and corroding the exhaust fan 32. After the condensate is discharged to the downstream flow channel 315, it will be dried by the airflow.

[0058] To improve exhaust efficiency, the cross-sectional area of ​​the downstream end of the exhaust duct 31 is increased along the airflow direction, ensuring smooth airflow and reducing wind speed during exhaust. Under low wind speed conditions, the airflow path after exiting the exhaust duct 31 is shortened, effectively reducing condensation on the ground caused by high-humidity airflow and preventing the risk of burns to users. A guide rib 35 is provided at the downstream end of the exhaust duct 31 to further ensure complete airflow discharge.

[0059] In this embodiment, the first air inlet pipe 41, the second air inlet pipe 51, and the exhaust pipe 31 are all formed by two half-shells joined together. The first air inlet pipe 41 and the exhaust pipe 31 are both tubular, while the second air inlet pipe 51 is box-shaped.

[0060] The dishwasher in this embodiment features a more rational layout through multiple air intakes and a coordinated exhaust system, resulting in a more uniform internal airflow and temperature field. Current laboratory tests show it can independently dry hand-washed dishes. While existing dishwashers generally require a high power of 600W to achieve independent drying, our drying system only uses 340W, achieving essentially the same drying effect in the same amount of time. This demonstrates that the same drying effect can be achieved with lower power, thanks to the efficient air intake and exhaust layout of this application.

[0061] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be set in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A dishwasher, comprising The box (1) has an open front and an air inlet on the side wall of the box (1). Door (2) is located on the front side of box (1) and is used to open and close box (1). When door (2) is closed, door (2) and box (1) form a washing chamber. Door (2) is provided with an exhaust port (21) that can communicate with the washing chamber. A hot air assembly is used to introduce hot airflow into the washing chamber through the air inlet. An exhaust assembly (3) is provided on the door (2) to exhaust the airflow that enters from the exhaust port (21); Its features are, The air inlet is provided on both the left and right side walls of the housing (1), and the air inlet is provided on the upper and lower parts of the left and / or right side walls of the housing (1). An impeller (6) is provided at at least one of the air inlets on the upper part. The impeller (6) rotates relative to the corresponding air inlet and the axis of rotation extends along the center line of the corresponding air inlet.

2. The dishwasher according to claim 1, characterized in that: The air inlet on one of the left and right side walls of the box (1) is called the first air inlet (11), and the air inlet on the other side wall of the box (1) is called the second air inlet (12). The hot air assembly includes a first hot air assembly (4) and a second hot air assembly (5) disposed outside the housing (1); The first hot air assembly (4) includes a first air inlet pipe (41), which is provided with a first air inlet (411) and a first air outlet (412). The first air inlet pipe (41) is provided with a first heating element (42) and a first fan (43) for driving airflow from the first air inlet (411) to the first air outlet (412). The first air inlet (411) is connected to the outside. The first air outlet (412) is connected to the first air inlet hole (11). The number of first air outlets (412) is the same as the number of first air inlets (11) and they are connected one by one. The second hot air assembly (5) includes a second air inlet pipe (51), which is provided with a second air inlet that communicates with the outside and a second air outlet (512) that communicates with the second air inlet hole (12). The second air inlet pipe (51) is provided with a second heating element and a second fan (53) for driving airflow from the second air inlet to the second air outlet (512). The number of second air outlets (512) is the same as the number of second air inlets (12) and they are connected one by one.

3. The dishwasher according to claim 2, characterized in that: When the second fan (53) is working, the second air inlet (12) is located downstream of the second air outlet (512); when the second fan (53) is not working, the second air inlet (12) is located upstream of the second air outlet (512).

4. The dishwasher according to claim 3, characterized in that: The second air inlet faces and is adjacent to the side wall of the housing (1).

5. The dishwasher according to claim 1, characterized in that: The exhaust assembly (3) includes an exhaust pipe (31) and an exhaust fan (32) disposed in the exhaust pipe (31). The exhaust pipe (31) is provided with an air inlet (311) that is connected to the exhaust port (21).

6. The dishwasher according to claim 5, characterized in that: The part where the air duct in the exhaust pipe (31) is connected to the air inlet (311) has an inverted U-shaped structure (312). The top periphery of the air inlet (311) is provided with a flow straightening rib (33), which is inclined from top to bottom.

7. The dishwasher according to claim 6, characterized in that: The exhaust pipe (31) has a water-blocking rib (34) on the side of the air inlet (311), and the water-blocking rib (34) extends vertically and is located between the two arms of the inverted U-shaped structure (312).

8. The dishwasher according to claim 5, characterized in that: The exhaust pipe (31) has a accommodating cavity (313) for accommodating the exhaust fan (32). The accommodating cavity (313) divides the interior of the exhaust pipe (31) into an upstream flow channel (314) and a downstream flow channel (315). Both the upstream flow channel (314) and the downstream flow channel (315) are connected to the accommodating cavity (313). The bottom wall of the accommodating cavity (313) is provided with a drain hole (316) for condensate drainage, which is connected to the downstream flow channel (315).

9. The dishwasher according to claim 5, characterized in that: The cross-sectional area of ​​the downstream end of the exhaust pipe (31) increases along the direction of airflow.

10. The dishwasher according to any one of claims 1 to 9, characterized in that: The impeller (6) includes a guide ring (61), a mounting shaft (62), and blades (63) disposed on the mounting shaft (62). The mounting shaft (62) extends along the center line of the corresponding air inlet and can rotate around the center line of the air inlet. There are multiple blades (63) and they are spaced apart circumferentially along the mounting shaft (62). All blades (63) are inclined relative to the axial direction of the mounting shaft (62) at the same inclination angle, so that one of the walls of the blades (63) serves as the windward surface. The number of blades (63) is odd and they are evenly distributed circumferentially along the mounting shaft (62). The guide ring (61) is coaxially arranged with the mounting shaft (62) and connected to the blade (63). The guide ring (61) is a cone shape with a gradually expanding diameter along the flow direction of the airflow.

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