CN220344340U

CN220344340U - Air duct structure for dish washing machine and dish washing machine

Info

Publication number: CN220344340U
Application number: CN202321372348.4U
Authority: CN
Inventors: 张健
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2024-01-16
Anticipated expiration: 2033-05-31

Abstract

The utility model relates to an air duct structure for a dish washer and the dish washer, the air duct structure for the dish washer comprises an exhaust hood, a hot air channel for discharging hot air is arranged in the exhaust hood, and the hot air channel is provided with a hot air inlet communicated with a washing cavity of the dish washer; and the cold air channel is positioned in the exhaust hood and can be communicated with the hot air channel, and the cold air channel is provided with a cold air inlet for air to enter. The hot and humid air discharged from the washing chamber of the dish washer enters the hot air channel, and the cold air flow entering through the cold air channel is mixed with the hot and humid air in the hot air channel, so that the temperature of the hot and humid air is reduced, namely the temperature of the discharged air flow is reduced, the possibility of scalding a user is reduced, and the requirements of the user can be met.

Description

Air duct structure for dish washing machine and dish washing machine

Technical Field

The utility model belongs to the technical field of household washing, and particularly relates to an air duct structure for a dish washing machine and the dish washing machine.

Background

In order to improve the drying effect of the washed tableware, a fan exhaust system is arranged on the existing dish washer, wet and hot gas in the inner container is exhausted outside the machine in the drying stage, so that the temperature in the inner container is prevented from being reduced, and the tableware and water vapor on the wall of the inner container are prevented from being condensed, and the drying effect of the tableware is ensured.

The utility model patent of China of the applicant's prior application of a cleaning machine, its patent number is ZL202221537160.6 (grant bulletin number is CNCN 217827786U), disclose a cleaning machine, including the inner container, the front side of the inner container is open, and the inner container has washing chambers, there are exhaust ports in fluid communication with washing chambers on the said inner container; the base is positioned at the lower part of the liner; the door body is arranged at the front side of the inner container and can open or close the opening of the inner container; the skirting board is arranged at the front part of the base, and a gap is reserved between the upper end of the skirting board and the lower end of the door body in a closed state; an exhaust pipe having a first end in fluid communication with the exhaust port; the base has an exhaust cavity therein, the second end of the exhaust pipe is in fluid communication with the exhaust cavity, the gap between the skirting board and the door body is defined as an exhaust gap, and the exhaust cavity is in fluid communication with the exhaust gap.

The temperature of the steam discharged through the exhaust gap is relatively high, and the risk of scalding the user exists.

Therefore, there is a need for further improvements to existing vent passages.

Disclosure of Invention

The first technical problem to be solved by the present utility model is to provide an air duct structure for a dish washer for reducing the temperature of the discharged hot and humid air, aiming at the state of the art.

The second technical problem to be solved by the utility model is to pass through a dish washer with the air duct structure.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: an air duct structure for a dishwasher, comprising:

a hood having a hot air passage therein for discharging hot air, the hot air passage having a hot air inlet for communicating with a washing chamber of the dishwasher;

and the cold air channel is positioned in the exhaust hood and can be communicated with the hot air channel, and the cold air channel is provided with a cold air inlet for air to enter.

The air entering the cold air channel is only required to be lower than the temperature of the hot and humid air in the washing chamber, and air or other air flows can be adopted. The gas entering the cold air channel is cold air.

The cold air from the cold air channel can be directly communicated with the hot air channel or can be discharged after being mixed with the hot air, the exhaust hood is internally provided with a mixing channel which is communicated with the hot air channel and the cold air channel, and the mixing channel is positioned at the downstream of the hot air channel and the cold air channel along the fluid flow path.

Preferably, the cold air channel is located at the peripheral side of the hot air channel, and a through hole communicated with the cold air channel is formed in a side wall plate of the hot air channel.

The cold air flowing out of the cold air channel enters the hot air channel, is mixed with the hot air in the hot air channel and then flows into the mixing channel, and other modes can be adopted, but preferably, the cold air channel is provided with a cold air outlet communicated with the mixing channel, the cold air outlet is communicated with the through hole, and the hot air channel is provided with a hot air outlet communicated with the mixing channel.

The cold air duct may be located above the hot air duct or below the hot air duct, but preferably the cold air duct is located below the hot air duct.

Further preferably, the mixing channel has a bottom wall and a top wall, both of which are inclined gradually from bottom to top in a direction away from the hot air inlet, and the slope of the top wall is larger than that of the bottom wall.

In order to more rapidly send the cold air into the cold air channel, the cold air channel further comprises a fan for sending the cold air into the cold air channel, and the cold air channel is provided with a contraction section gradually reducing in cross section area along the airflow flow path, and the contraction section is positioned downstream of the fan along the airflow flow direction. The presence of the constriction accelerates the airflow.

In addition, the air flow speed of the cold air channel is high, and the pressure of the cold air outlet is reduced according to the Bernoulli principle at the cold air outlet, so that the air flow speed of hot air is increased, and the air exhaust time and the drying time are shortened.

In order to further accelerate the flow rate of the cold air flow, the cold air channel is vertically arranged, the side wall of the contraction section of the cold air channel is provided with an inclined section, and the inclined section gradually inclines from bottom to top towards the direction of the hot air inlet and is positioned at one side far away from the hot air inlet.

In order to adjust the air outlet of the cold air channel and the hot air channel, the through hole is provided with an adjusting piece which is arranged to rotate along the arrangement direction of the hot air channel and the cold air channel, a first side wall of two side walls which are arranged at intervals along the length direction of the hot air channel is adjacent to the hot air inlet, and the position of the adjusting piece adjacent to the first side wall is rotatably arranged at the corresponding position of the through hole.

Preferably, the regulating plate has the following three states: in a first state, the regulating piece is arranged along the surface where the through hole is located; in the second state, the regulating piece is in a state of rotating towards the cold air channel direction; in the third state, the regulating piece is in a state of rotating towards the hot air channel direction.

In order to automatically adjust the channel sizes of the cold air channel and the hot air channel, the first side wall of the adjusting piece is connected to the side edge, adjacent to the hot air inlet, of the through hole through a reed, two side walls, adjacent to the first side wall, of the adjusting piece are respectively and rotatably arranged at corresponding positions of the through hole, the reed is a first metal piece and a second metal piece which are sequentially arranged along the arrangement direction of the hot air channel and the cold air channel, and when the first metal piece and the second metal piece are heated, the thermal expansion coefficients of the first metal piece and the second metal piece are different, so that the reed bends towards the direction of the hot air channel during heating to enable the adjusting piece to be in a third state, or bends towards the direction of the cold air channel to enable the adjusting piece to be in a second state.

The exhaust hood has various structural forms, can adopt an integral part form or a split part form, but preferably comprises a main hood body and a wind guide hood, wherein the main hood body is internally provided with the hot air channel and the cold air channel, the wind guide hood is internally provided with the mixing channel, and the wind guide hood can be detachably arranged on the main hood body.

Preferably, the hot air channel extends along the front-rear direction, the hot air inlet is positioned at the rear end of the hot air channel, and the mixing channel is positioned in front of the hot air channel.

The utility model solves the second technical problem by adopting the technical proposal that: the dish washer comprises a machine shell and an air duct structure, and is characterized in that the air duct structure is the air duct structure, a washing chamber is arranged in the machine shell, the exhaust hood is at least partially positioned outside the washing chamber, and the hot air channel extends along the front-rear direction.

Preferably, the casing comprises a box body with an open front side and a door body arranged at the open position to open and close the open front side, a skirting board is arranged at the front side of the box body at a position below the door body, a gap is reserved between the skirting board and the door body, and the gap is communicated with an air outlet of the exhaust hood. In addition, the method can also be applied to a dish washer with a top door.

In order to guide the hot and humid air in the washing cavity into the hot air inlet, a base is arranged below the shell, the base and the shell are enclosed together to form a cavity communicated with the washing cavity, and the hot air inlet is communicated with the cavity.

Preferably, the side wall plate of the washing chamber is provided with an air outlet, the box body is provided with a diversion pipeline which is communicated with the air outlet at a position outside the washing chamber, the diversion pipeline is vertically arranged, and the lower end of the diversion pipeline is communicated with the cavity. The wet and hot air in the washing cavity can be reliably guided into the cavity by the guide pipeline.

Preferably, the cold air channel is located locally between the casing and the skirting board, and the hot air channel extends locally into the cavity, so that the hot air inlet of the hot air channel is located in the cavity. Thus, the hot air inlet is communicated with the washing chamber through the cavity.

Compared with the prior art, the utility model has the advantages that: the hot and humid air exhausted from the washing chamber of the dish washer enters the hot air channel, and the cold air flow flowing out from the cold air channel is mixed with the hot and humid air in the hot air channel, so that the temperature of the hot and humid air is reduced, namely the temperature of the exhausted air flow is reduced, the possibility of scalding a user is reduced, and the requirements of the user can be met.

Drawings

Fig. 1 is a sectional view of the present embodiment;

FIG. 2 is another angular cross-sectional view of the present embodiment;

FIG. 3 is an enlarged schematic view of the portion I in FIG. 1;

FIG. 4 is an enlarged schematic view of the portion II in FIG. 2;

fig. 5 is a sectional view at the air outlet in the present embodiment;

FIG. 6 is a cross-sectional view of the duct structure with the tab in a first state;

FIG. 7 is a cross-sectional view of the air duct structure with the regulating plate in a third state;

fig. 8 is a cross-sectional view of the duct structure with the regulating blade in a second state.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 5, the dishwasher of the present embodiment includes an organic housing 4 and an air duct structure. The inside of the casing 4 has a washing chamber 40, in this embodiment, the casing 4 includes a box 41 having an opening at a front side and a door 42 disposed at the opening to open and close the opening, the front side of the box 41 has a skirting board 5 at a position below the door 42, and a gap 6 is left between the skirting board 5 and the door 42. The dish washer is internally provided with a drying component for drying the dishes, and the drying component adopts a structure in the prior art, and will not be described in detail in this embodiment.

As shown in fig. 1 to 8, the air duct structure includes a hood 1 and a fan 2, and the hood 12 is at least partially located outside the washing chamber 40. Specifically, the exhaust hood 1 includes a main hood body 11 and an air guiding hood 12. The main casing 11 has a hot air passage 111 and a cold air passage 112 for discharging hot air. Wherein the hot air passage 111 extends in the front-rear direction, and a rear end of the hot air passage 111 has a hot air inlet 1111 communicating with the washing chamber 40. Specifically, a base 7 is disposed below the casing 4, the base 7 and the casing 4 together enclose a cavity 70 communicating with the washing chamber 40, and the rear end of the hot air channel 111 extends into the cavity 70, so that the hot air inlet 1111 is located in the cavity 70 and communicates with the cavity 70. The first side plate of the washing chamber 40 is provided with an air outlet 401, the box 41 is provided with a diversion pipeline 43 communicated with the air outlet 401 at a position outside the washing chamber, the diversion pipeline 43 is vertically arranged, and the lower end of the diversion pipeline 43 is communicated with the cavity 70.

The cool air passage 112 has a cool air inlet 1121 into which the gas is introduced. The aforementioned cool air duct 112 is located on the peripheral side of the warm air duct 111, and in the present embodiment, the cool air duct 112 is located below the warm air duct 111 and between the skirting board 5 and the chassis 4. In addition, the fan 2 is used to send cool air into the cool air duct 112. In the present embodiment, the blower 2 is installed at the cool air inlet of the cool air duct 112. The aforementioned cool air duct 112 has a constriction 21 having a gradually decreasing cross-sectional area along the airflow path, and the constriction 21 is located downstream of the blower 2 along the airflow direction. In the present embodiment, the cold air duct 112 is vertically arranged, and the sidewall of the contraction section 21 of the cold air duct 112 has an inclined section 211, and the inclined section 211 is gradually inclined from bottom to top toward the hot air inlet 1111 (i.e. forward), and is located at a side far from the hot air inlet 1111.

As shown in fig. 3 and 6 to 8, the side wall plate of the hot air duct 111 is provided with a through hole 113 communicating with the cold air duct 112. At the through-hole 113, a regulating piece 3 arranged to be rotatable in the arrangement direction of the hot air passage 111 and the cold air passage 112 is installed, the first side wall 31 of two side walls of the regulating piece 3 arranged at intervals in the length direction of the hot air passage 111 is arranged adjacent to the hot air inlet 1111, and a position of the regulating piece 3 adjacent to the first side wall 31 is rotatably provided at a corresponding position of the through-hole 113. Wherein the regulating plate 3 has the following three states: as shown in fig. 6, in the first state, the regulating piece 3 is arranged along the surface where the through-hole 113 is located; as shown in fig. 8, in the second state, the regulating blade 3 is in a state of rotating toward the cold air passage 112; as shown in fig. 7, in the third state, the regulating blade 3 is in a state of rotating in the direction of the hot air passage 111. Specifically, the first side wall 31 of the regulating blade 3 is connected to the side edge of the through-hole 113 adjacent to the hot air inlet 1111 by the reed 33, and both side walls of the regulating blade 3 adjacent to the first side wall 31 are rotatably provided at corresponding positions of the through-hole 113, respectively, the reed 33 is a first metal piece and a second metal piece which are sequentially arranged along the arrangement direction of the hot air passage 111 and the cold air passage 112, and the first metal piece and the second metal piece have different thermal expansion coefficients when heated, so that the reed 33 is bent in the direction of the hot air passage 111 to bring the regulating blade 3 into the third state or in the direction of the cold air passage 112 to bring the regulating blade 3 into the second state during heating.

As shown in fig. 1 to 8, the air guide cover 12 has therein a mixing passage 121 communicating with both the hot air passage 111 and the cold air passage 112, the cold air passage 112 has a cold air outlet 1122 communicating with the mixing passage 121, the cold air outlet 1122 communicates with the through-hole 113, and the hot air passage 111 has a hot air outlet 1112 communicating with the mixing passage 121. In the present embodiment, the air guiding hood 12 is located in front of the main hood 11, and the mixing duct 121 is located in front of the hot air duct 111. Specifically, the wind scooper 12 is detachably mounted on the main housing 11. Along the fluid flow path, the mixing channel 121 is located downstream of the hot air channel 111 and the cold air channel 112. The outlet of the mixing channel 121 is the exhaust outlet of the exhaust hood 1, and the exhaust outlet of the exhaust hood is communicated with the gap 6. The aforementioned mixing channel 121 has a bottom wall 1211 and a top wall 1212, both the bottom wall 1211 and the top wall 1212 being inclined gradually from bottom to top in a direction away from the hot air inlet 1111, the slope of the top wall 1212 being greater than the slope of the bottom wall 1211.

The working process of the dish washer is as follows:

when the dish washer starts to dry, the temperature in the washing chamber 40 is highest, so that the temperature in the hot air channel 111 is also high, the reed 33 deforms due to the high temperature, thereby pushing the adjusting plate 3 to rotate upwards, contracting the hot air channel 111, expanding the cold air channel 112, and controlling the air outlet temperature at the air outlet of the exhaust hood 1.

When the drying is performed for a period of time, the temperature of the hot air channel 111 gradually decreases, the reed 33 also slowly contracts, the adjusting sheet is horizontal, at this time, the air outlet volume of the hot air channel 111 is increased compared with the third state, the drying efficiency is improved, and the air outlet volume of the cold air channel 112 is converged at the same time, so as to control the air outlet temperature of the air outlet of the exhaust hood 1.

At the later stage of the drying stage, the temperature of the hot air channel 111 further drops, the reed 33 continues to shrink, the regulating piece 3 turns downwards, at this time, the air outlet volume of the hot air channel 111 is maximum, the drying efficiency is improved, and meanwhile, the hot air channel is converged with the cold air of the cold air channel 112, so that the air outlet temperature at the air outlet of the exhaust hood 1 is controlled (the air outlet temperature is not too low, and condensation is easy to generate in winter).

In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present utility model, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Since the disclosed embodiments of the utility model may be arranged in a variety of orientations, these directional terms are used by way of illustration only and are in no way limiting.

Claims

1. An air duct structure for a dishwasher, comprising:

a hood (1) having a hot air passage (111) for discharging hot air therein, the hot air passage (111) having a hot air inlet (1111) for communicating with a washing chamber (40) of the dishwasher;

it is characterized in that the method also comprises the following steps:

and a cold air channel (112) which is positioned in the exhaust hood (1) and can be communicated with the hot air channel (111), wherein the cold air channel (112) is provided with a cold air inlet (1121) for air to enter.

2. The duct structure of claim 1, wherein: the exhaust hood (1) is also internally provided with a mixing channel (121) which is communicated with the hot air channel (111) and the cold air channel (112), and the mixing channel (121) is positioned at the downstream of the hot air channel (111) and the cold air channel (112) along the fluid flow path.

3. The duct structure of claim 2, wherein: the cold air channel (112) is positioned on the periphery of the hot air channel (111), and a through hole (113) communicated with the cold air channel (112) is formed in the side wall plate of the hot air channel (111).

4. A duct structure according to claim 3, wherein: the cold air channel (112) is provided with a cold air outlet (1122) communicated with the mixing channel (121), the cold air outlet (1122) is communicated with the through hole (113), and the hot air channel (111) is provided with a hot air outlet (1112) communicated with the mixing channel (121).

5. The duct structure of claim 4, wherein: the cold air channel (112) is positioned below the hot air channel (111).

6. The duct structure of claim 5, wherein: the mixing channel (121) has a bottom wall (1211) and a top wall (1212), the bottom wall (1211) and the top wall (1212) each have a slope greater than that of the bottom wall (1211) in a state of gradually inclining from bottom to top in a direction away from the hot air inlet (1111).

7. The duct structure of claim 5, wherein: the air conditioner further comprises a fan (2) used for feeding cold air into the cold air channel (112), the cold air channel (112) is provided with a contraction section (21) with a gradually reduced cross-sectional area along the airflow flow path, and the contraction section (21) is positioned downstream of the fan (2) along the airflow flow direction.

8. The duct structure of claim 7, wherein: the cold air channel (112) is vertically arranged, the side wall of the contraction section (21) of the cold air channel (112) is provided with an inclined section (211), and the inclined section (211) gradually inclines from bottom to top towards the hot air inlet (1111) and is positioned at one side far away from the hot air inlet (1111).

9. A duct structure according to claim 3, wherein: the through hole (113) is provided with a regulating piece (3) which is arranged to rotate along the arrangement direction of the hot air channel (111) and the cold air channel (112), the regulating piece (3) is arranged adjacent to the hot air inlet (1111) along the first side wall (31) of two side walls which are arranged at intervals along the length direction of the hot air channel (111), and the position of the regulating piece (3) adjacent to the first side wall (31) is rotatably arranged at the corresponding position of the through hole (113).

10. The duct structure of claim 9, wherein: the adjusting piece (3) has the following three states: in a first state, the adjusting piece (3) is arranged along the surface of the through hole (113); in the second state, the regulating piece (3) is in a state of rotating towards the direction of the cold air channel; in the third state, the regulating piece (3) is in a state of rotating towards the hot air channel direction.

11. The duct structure of claim 10, wherein: the first side wall (31) of the regulating piece (3) is connected to the side edge of the through hole (113) adjacent to the hot air inlet (1111) through a reed (33), two side walls of the regulating piece (3) adjacent to the first side wall (31) are respectively and rotatably arranged at corresponding positions of the through hole (113), the reed (33) is a first metal piece and a second metal piece which are sequentially arranged along the arrangement direction of the hot air channel (111) and the cold air channel (112), and the thermal expansion coefficients of the first metal piece and the second metal piece are different when being heated, so that the reed (33) bends towards the hot air channel (111) during heating to enable the regulating piece (3) to be in a third state, or bends towards the cold air channel (112) to enable the regulating piece (3) to be in a second state.

12. The duct structure of claim 2, wherein: the exhaust hood (1) comprises a main hood body (11) and a wind guide hood (12), wherein the hot air channel (111) and the cold air channel (112) are arranged in the main hood body (11), the mixing channel (121) is arranged in the wind guide hood (12), and the wind guide hood (12) can be detachably arranged on the main hood body (11).

13. The duct structure of claim 2, wherein: the hot air channel (111) extends along the front-rear direction, the hot air inlet (1111) is positioned at the rear end of the hot air channel (111), and the mixing channel (121) is positioned in front of the hot air channel (111).

14. A dishwasher, comprising a casing (4) and an air duct structure, characterized in that the air duct structure is the air duct structure according to any one of claims 1 to 13, the casing (4) has a washing chamber (40) inside, the hood (1) is at least partially located outside the washing chamber (40), and the hot air duct (111) extends in the front-rear direction.

15. The dishwasher of claim 14, characterized in that: the casing (4) comprises a box body (41) with an open front side and a door body (42) arranged at the open position to open and close the open front side, a skirting board (5) is arranged at the front side of the box body (41) at a position below the door body (42), a gap (6) is reserved between the skirting board (5) and the door body (42), and the gap (6) is communicated with an air outlet of the exhaust hood (1).

16. The dishwasher of claim 15, characterized in that: a base (7) is arranged below the machine shell (4), a cavity (70) communicated with the washing cavity (40) is formed by the base (7) and the machine shell (4), and the hot air inlet (1111) is communicated with the cavity (70).

17. The dishwasher of claim 16, characterized in that: an air outlet (401) is formed in the first side plate of the washing chamber (40), a guide pipeline (43) communicated with the air outlet (401) is arranged at a position, outside the washing chamber, of the box body (41), the guide pipeline (43) is vertically arranged, and the lower end of the guide pipeline (43) is communicated with the cavity (70).

18. The dishwasher of claim 17, characterized in that: the cold air channel is partially positioned between the shell (4) and the skirting board, and the part of the hot air channel stretches into the cavity, so that the hot air inlet of the hot air channel is positioned in the cavity.