CN219137177U - Cleaning apparatus - Google Patents

Abstract

The utility model discloses a cleaning device, comprising: the washing cavity assembly comprises a cavity body and a cavity bottom, the cavity bottom is connected to the bottom of the cavity body, the cavity body and the cavity bottom jointly define an accommodating space, a plurality of supporting ribs are arranged on the bottom wall of the cavity bottom, and the supporting ribs are distributed at intervals along the circumferential direction of the cavity bottom; the fluid entering assembly penetrates through the bottom wall of the cavity bottom, the fluid entering assembly can rotate around the axis of the fluid entering assembly, and external fluid is suitable for entering the accommodating space through the fluid entering assembly. According to the cleaning equipment disclosed by the utility model, the drying efficiency is higher, clothes are not easy to damage, and the service life of the cleaning equipment is prolonged.

Description

Cleaning apparatus

Technical Field

The utility model relates to the technical field of cleaning, in particular to cleaning equipment.

Background

As the demands of human beings on the quality of life are increasing, the use of washing machines to clean laundry is becoming a new lifestyle. However, in the related art, the drying efficiency of the washing machine is low, the laundry is easily damaged by the long-time high-temperature baking, and the parts of the washing machine are damaged due to the high temperature in the washing container operated for a long time, thereby shortening the service life of the washing machine.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a cleaning apparatus, which has high drying efficiency and is not easy to damage clothes.

A cleaning apparatus according to an embodiment of the present utility model includes: the washing cavity assembly comprises a cavity body and a cavity bottom, the cavity bottom is connected to the bottom of the cavity body, the cavity body and the cavity bottom jointly define an accommodating space, a plurality of supporting ribs are arranged on the bottom wall of the cavity bottom, and the supporting ribs are distributed at intervals along the circumferential direction of the cavity bottom; the fluid entering assembly penetrates through the bottom wall of the cavity bottom, the fluid entering assembly can rotate around the axis of the fluid entering assembly, and external fluid is suitable for entering the accommodating space through the fluid entering assembly.

According to the cleaning equipment provided by the embodiment of the utility model, the plurality of support ribs are arranged on the cavity bottom, and a certain gap is formed between the object to be cleaned and the bottom wall of the cavity bottom, so that the flow of hot air flow on the cavity bottom and the surface of the object to be cleaned is facilitated, the drying time is shortened, the drying efficiency of the cleaning equipment is improved, and the damage to the object to be cleaned due to long-time high-temperature drying is reduced. In addition, the damage to the parts of the cleaning equipment caused by long-time high temperature can be reduced, and the service life of the cleaning equipment is prolonged. In addition, the cleaning device is good in cleaning effect, and the use experience of a user is improved.

According to some embodiments of the utility model, each of the support ribs includes a first rib section and a second rib section, the first rib section is connected to a side of the second rib section away from the bottom wall of the cavity bottom, the second rib section is connected to the bottom wall of the cavity bottom, and outer circumferential surfaces of the first rib section and the second rib section are each formed as an arc surface.

According to some embodiments of the utility model, the outer peripheral surface of the first bead section is formed as a cambered surface protruding in a direction away from the central axis of the first bead section; and/or the outer peripheral surface of the second bead section is formed as a cambered surface recessed toward a direction adjacent to the central axis of the second bead section.

According to some embodiments of the utility model, the plurality of support ribs extend in a curve from inside to outside.

According to some embodiments of the utility model, the outer ends of the plurality of support ribs are offset from the radial direction of the cavity bottom from inside to outside.

According to some embodiments of the utility model, the cavity bottom comprises a connecting wall connected between the bottom wall and the cavity, the connecting wall being formed as a curved surface to achieve a rounded connection between the bottom wall and the cavity.

According to some embodiments of the utility model, the cavity is a transparent member.

According to some embodiments of the utility model, the cleaning device further comprises: the circulating flow path is provided with an inlet and a plurality of outlets, the inlet and the outlets are communicated with the inside of the accommodating space, the outlets are arranged at intervals along the circumferential direction of the accommodating space, and the fluid inlet assembly is arranged at the inlet; the fluid extraction assembly is arranged on the circulating flow path and is used for extracting fluid in the accommodating space.

According to some embodiments of the utility model, the fluid extraction assembly comprises a fluid inlet and a fluid outlet; the circulating flow path comprises an inlet circulating flow path and a plurality of outlet circulating flow paths, one end of the inlet circulating flow path is the inlet, the other end of the inlet circulating flow path is connected with the fluid outlet, one ends of the outlet circulating flow paths are respectively a plurality of outlets, and the other ends of the outlet circulating flow paths are connected with the fluid inlet.

According to some embodiments of the utility model, the outlet circulation flow path includes a first outlet pipe having one end connected to the corresponding outlet and the other end connected to the fluid inlet, and a plurality of second outlet pipes having one end connected to the plurality of outlets and the other ends connected to the first outlet pipe, and the second outlet pipe having a smaller cross-sectional area than the first outlet pipe.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a cleaning apparatus according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of portion B of FIG. 1;

FIG. 3 is a top view of a cleaning apparatus according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a cleaning apparatus according to an embodiment of the present utility model;

fig. 5 is a schematic view of a fluid extraction assembly of a cleaning apparatus according to an embodiment of the utility model.

Reference numerals:

100. a cleaning device;

1. a wash chamber assembly; 11. a cavity body; 12. a cavity bottom;

121. an accommodating space; 122. a connecting wall;

13. a support rib; 131. a first rib section; 132. a second rib section;

2. a fluid intake assembly; 3. a circulation flow path;

31. an inlet; 32. an outlet;

33. an inlet circulation flow path; 34. an outlet circulation flow path;

341. a first outlet conduit; 342. a second outlet conduit;

4. a fluid extraction assembly; 41. a fluid inlet; 42. a fluid outlet.

Detailed Description

Embodiments of the present utility model are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary, and a cleaning apparatus 100 according to embodiments of the present utility model is described below with reference to fig. 1 to 5. For example, the cleaning apparatus 100 may be a washing machine or a shoe washing machine, but is not limited thereto.

As shown in fig. 1, a cleaning apparatus 100 according to an embodiment of the present utility model includes a wash chamber assembly 1 and a fluid inlet assembly 2.

Specifically, the washing chamber assembly 1 comprises a chamber body 11 and a chamber bottom 12, wherein the chamber bottom 12 is connected to the bottom of the chamber body 11, the chamber body 11 and the chamber bottom 12 jointly define an accommodating space 121, a plurality of supporting ribs 13 are arranged on the bottom wall of the chamber bottom 12, and the supporting ribs 13 are distributed at intervals along the circumferential direction of the chamber bottom 12. In the description of the present utility model, "plurality" means two or more. For example, in the examples of fig. 1 and 4, the cavity 11 and the cavity bottom 12 are sequentially formed from top to bottom, and the lower end of the cavity 11 is connected to the upper end of the cavity bottom 12. Thus, the receiving space 121 may be used for placing the articles to be cleaned and the washing liquid. In addition, by providing the plurality of supporting ribs 13, when the cleaning apparatus 100 performs a drying task, the articles to be cleaned placed in the accommodating space 121 are contacted with the plurality of supporting ribs 13, and the plurality of supporting ribs 13 separate the surface of the articles to be cleaned from the bottom wall of the cavity bottom 12, that is, a certain gap is formed between the articles to be cleaned and the bottom wall of the cavity bottom 12, which is beneficial to the flow of hot air flow on the cavity bottom 12 and the surfaces of the articles to be cleaned, thereby shortening the drying time, improving the drying efficiency, and further reducing the damage of the articles to be cleaned by long-time high-temperature drying. In addition, the inside of the cleaning device 100 can be effectively prevented from being in a high-temperature drying state for a long time, the damage of the high temperature to the components of the cleaning device 100 for a long time can be reduced, and the service life of the cleaning device 100 is prolonged.

Referring to fig. 1, the fluid inlet assembly 2 is disposed through the bottom wall of the cavity bottom 12, the fluid inlet assembly 2 is rotatable about its own axis of the fluid inlet assembly 2, and external fluid is adapted to enter the receiving space 121 through the fluid inlet assembly 2. When the accommodating space 121 is filled with the cleaning solution, the cleaning solution in the accommodating space 121 is impacted by the fluid, such as gas and/or liquid, flowing into the accommodating space 121 from the fluid inlet assembly 2, so that a large number of bubbles are generated, and the bubbles are broken to generate oscillation when contacting the cleaning object to be cleaned, so that stains on the cleaning object are stripped by the oscillation, and the cleaning effect is achieved. In addition, the bubbles can be broken to generate energy, so that stains on the articles to be cleaned can be removed more effectively, and the cleaning effect is better. In addition, when the external fluid flows through the fluid inlet assembly 2, the reaction force to the fluid inlet assembly 2 can push the fluid inlet assembly 2 to rotate around the axis of the fluid inlet assembly 2, the cleaning liquid in the accommodating space 121 is impacted by the mechanical force and the air pressure of the fluid inlet assembly 2, turbulence or flocculation flow is generated, and the dirt is easy to accelerate the fusion of the detergent and the articles to be cleaned under the action of the turbulence or flocculation flow, so that the cleaning effect is enhanced, and the cleaning time is shortened.

According to the cleaning device 100 of the embodiment of the utility model, the plurality of support ribs 13 are arranged on the cavity bottom 12, and a certain gap is formed between the object to be cleaned and the bottom wall of the cavity bottom 12, so that the flow of hot air flow on the cavity bottom 12 and the surface of the object to be cleaned is facilitated, the drying time is shortened, the drying efficiency of the cleaning device 100 is improved, and the damage to the object to be cleaned due to long-time high-temperature drying is reduced. In addition, damage to components of the cleaning apparatus 100 from high temperatures for a long period of time can be reduced, and the service life of the cleaning apparatus 100 can be prolonged. In addition, the cleaning device 100 has a good cleaning effect, and improves the use experience of the user.

According to some embodiments of the present utility model, referring to fig. 2, each of the support ribs 13 includes a first rib segment 131 and a second rib segment 132, the first rib segment 131 being connected to a side of the second rib segment 132 remote from the bottom wall of the cavity bottom 12, the second rib segment 132 being connected to the bottom wall of the cavity bottom 12, and outer circumferential surfaces of the first rib segment 131 and the second rib segment 132 each being formed as an arc surface. For example, in the example of fig. 2, a first rib segment 131 and a second rib segment 132 are arranged in sequence from top to bottom, the second rib segment 132 being connected between the first rib segment 131 and the bottom wall of the cavity bottom 12. So set up, the simple structure of supporting rib 13, production and processing is convenient to be favorable to the production and processing of cleaning equipment 100. In addition, through the connection of the second rib section 132 and the cavity bottom 12, the connection of the supporting rib 13 is firm, and the long-term stable use of the supporting rib 13 is facilitated. In addition, the outer circumferential surfaces of the first rib section 131 and the second rib section 132 are formed as arc surfaces, which is advantageous for the flow of air flow, so that the drying efficiency of the cleaning apparatus 100 can be improved, and the abrasion between the supporting ribs 13 and the articles to be cleaned can also be reduced, and the abrasion of the supporting ribs 13 to the articles to be cleaned can be reduced.

Alternatively, with reference to fig. 2, the outer peripheral surface of the first bead segment 131 is formed as a cambered surface that protrudes in a direction away from the central axis of the first bead segment 131. And/or the outer circumferential surface of the second rib section 132 is formed as a cambered surface recessed toward a direction adjacent to the central axis of the second rib section 132.

The arrangement of the first rib section 131 and the second rib section 132 includes the following three cases:

the outer peripheral surface of the first, only first bead segment 131 is formed as an arc surface (not shown) protruding toward a direction away from the central axis of the first bead segment 131. Therefore, the air flow is facilitated to flow from the upper side of the first rib section 131, so that the air flow in the accommodating space 121 is facilitated to flow, and the drying work is facilitated to be smoothly carried out. In addition, the abrasion of the first rib section 131 to the cleaning object is reduced, thereby reducing the damage to the cleaning object.

The outer peripheral surface of the second, only second bead section 132 is formed as a cambered surface (not shown) recessed toward the direction adjacent to the central axis of the second bead section 132. Thereby, while facilitating the airflow, the space occupied by the second rib section 132 in the accommodating space 121 is reduced, thereby increasing the volume of the accommodating space 121 and improving the usability of the cleaning apparatus 100.

Third, referring to fig. 2, the outer peripheral surface of the first rib section 131 is formed as an arc surface protruding toward a direction away from the central axis of the first rib section 131, and the outer peripheral surface of the second rib section 132 is formed as an arc surface recessed toward a direction adjacent to the central axis of the second rib section 132. By the arrangement, on one hand, the air flow is facilitated to flow on the outer peripheral surface of the supporting rib 13, so that the air flow is facilitated to flow in the accommodating space 121, and the drying work is facilitated to be smoothly carried out. On the other hand, the space occupied by the second rib section 132 in the accommodating space 121 can be reduced, so that the volume of the accommodating space 121 is increased, and the usability of the cleaning apparatus 100 is improved. Moreover, damage to the article to be cleaned by the first rib section 131 and the second rib section 132 can also be reduced.

According to some embodiments of the utility model, the plurality of support ribs 13 extend in a curved line from the inside to the outside. For example, in the example of fig. 2, a plurality of ribs 13 extend curvilinearly from the center of the cavity bottom 12 in the radial direction of the cavity bottom 12. Therefore, the air flow in the accommodating space 121 flows in a curved shape between the plurality of supporting ribs 13 and the cavity bottom 12, so that the air flow in the accommodating space 121 is facilitated, the drying process is faster, the air flow is more uniform, and the formation of flocculation flow between the air flows can be reduced. It should be noted that the radian of the supporting rib 13 may be specifically set according to actual requirements, so as to better satisfy practical applications.

Alternatively, with reference to fig. 2, the outer ends of the plurality of support ribs 13 are offset from the radial direction of the cavity bottom 12 from the inside to the outside. Thereby, the length of the supporting rib 13 is increased, so that the distance that the air flow flows along the extending direction of the supporting rib 13 is increased, the sufficient contact between the cleaning object and the air flow is facilitated, and the drying efficiency of the cleaning device 100 is further improved.

According to some embodiments of the present utility model, as shown in fig. 1 and 4, the cavity bottom 12 includes a connection wall 122, the connection wall 122 being connected between the bottom wall and the cavity 11, the connection wall 122 being formed as a curved surface to achieve a smooth connection between the bottom wall and the cavity 11. By means of the arrangement, on one hand, the abrasion of the article to be cleaned at the joint of the cavity 11 and the cavity bottom 12 can be reduced, and the damage to the article to be cleaned can be reduced through smooth connection of the bottom wall and the cavity 11. On the other hand, accumulation of the used sewage in the storage space 121 can be reduced, and the sewage can smoothly flow to the cavity bottom 12, so that the sewage can be smoothly discharged to the outside of the cleaning apparatus 100, and bacterial growth in the storage space 121 can be reduced. In addition, the connecting wall 122 has a simple structure and low cost, and can reduce the production cost of the cleaning apparatus 100.

Alternatively, the cavity 11 may be provided as a transparent member, but is not limited thereto. By the arrangement, the washing and drying effects of the cleaning device 100 are convenient for a user, and the user can know the use condition of the cleaning device 100 at any time, so that the use experience of the user is improved.

Further, referring to fig. 1, the cleaning apparatus 100 includes a circulation flow path 3 and a fluid extraction assembly 4, the circulation flow path 3 having an inlet 31 and a plurality of outlets 32, each of the inlet 31 and the plurality of outlets 32 communicating with the interior of the accommodating space 121, the plurality of outlets 32 being disposed at intervals along the circumferential direction of the accommodating space 121.

For example, in the examples of fig. 1 and 3, the plurality of outlets 32 are located at the top end of the receiving space 121. When the fluid is a gas, during the operation of the cleaning apparatus 100, the air flow in the accommodating space 121 may have a certain amount of heat, and the air flow in the accommodating space 121 may flow into the circulation flow path 3 through the plurality of outlets 32 and then flow back into the accommodating space 121 through the inlet 31. Therefore, by providing the plurality of outlets 32, the fluid in the accommodating space 121 can flow into the circulation flow path 3 from the plurality of outlets 32 respectively, compared with the single outlet 32, the suction force applied to the articles to be cleaned is dispersed, and the articles to be cleaned in the accommodating space 121 are not easy to accumulate, so that the articles to be cleaned are in full contact with the washing liquid in the accommodating space 121, and the cleaning effect of the cleaning device 100 is improved. In addition, the circulation flow path 3 circulates the fluid in the storage space 121, so that the loss of the heat of the fluid can be reduced, and the utilization rate of the fluid in the storage space 121 can be improved.

Referring to fig. 1 and 3, the fluid inlet assembly 2 is disposed at the inlet 31, the fluid extracting assembly 4 is disposed on the circulation flow path 3, and the fluid extracting assembly 4 is used for extracting the fluid in the accommodating space 121. Thus, by providing the fluid extraction assembly 4, the fluid in the accommodating space 121 can rapidly flow into the circulation flow path 3, which is beneficial for the fluid to smoothly flow between the accommodating space 121 and the circulation flow path 3, thereby ensuring the normal use of the cleaning apparatus 100. In addition, the fluid flowing into the fluid inlet assembly 2 through the circulation flow path 3 can drive the fluid inlet assembly 2 to rotate around the axis of the fluid inlet assembly 2, so that the cleaning effect of the cleaning device 100 is further improved under the mechanical force of the fluid inlet assembly 2.

According to some embodiments of the present utility model, referring to fig. 5, the fluid extraction assembly 4 includes a fluid inlet 41 and a fluid outlet 42, the circulation flow path 3 includes an inlet circulation flow path 33 and a plurality of outlet circulation flow paths 34, one end of the inlet circulation flow path 33 is an inlet 31, the other end of the inlet circulation flow path 33 is connected to the fluid outlet 42, one ends of the plurality of outlet circulation flow paths 34 are a plurality of outlets 32, respectively, and the other ends of the plurality of outlet circulation flow paths 34 are connected to the fluid inlet 41. When the cleaning apparatus 100 is in operation, the fluid extraction assembly 4 extracts the fluid in the accommodating space 121, so that a negative pressure is formed at the plurality of outlets 32, and the fluid in the accommodating space 121 flows into the plurality of outlet circulation flow paths 34 through the plurality of outlets 32, and then flows into the accommodating space 121 after flowing through the fluid inlet 41, the fluid outlet 42, the inlet circulation flow path 33 and the inlet 31 (the flow path of the fluid is indicated by an arrow a in fig. 1). Thus, one cycle of the fluid in the housing space 121 is completed. Thereby facilitating smooth flow of fluid and thus normal use of the cleaning apparatus 100.

Further, referring to fig. 1, the outlet circulation flow path 34 includes a first outlet pipe 341 and a plurality of second outlet pipes 342, one end of the first outlet pipe 341 is connected to the corresponding outlet 32, the other end of the first outlet pipe 341 is connected to the fluid inlet 41, one end of the plurality of second outlet pipes 342 is connected to the plurality of outlets 32, and the other ends of the plurality of second outlet pipes 342 are connected to the first outlet pipe 341. That is, the fluid in the receiving space 121 may flow from the plurality of second outlet pipes 342 into the first outlet pipe 341 to be mixed with the fluid in the first outlet pipe 341 and then flow to the fluid inlet 41. So configured, the fluid extraction assembly 4 is directly connected to only the first outlet conduit 341, and the connection between the fluid extraction assembly 4 and the first outlet conduit 341 is relatively simple, facilitating assembly between the fluid extraction assembly 4 and the first outlet conduit 341, and thus facilitating assembly of the cleaning apparatus 100. In addition, the space occupied by the plurality of second outlet pipes 342 on the washing container can be reduced, so that the connection of the components of the cleaning apparatus 100 is more compact, thereby making the cleaning apparatus 100 more slim.

Optionally, referring to fig. 1, the cross-sectional area of the second outlet conduit 342 is smaller than the cross-sectional area of the first outlet conduit 341. By the arrangement, the accumulation of the objects to be cleaned in the accommodating space 121 is effectively avoided, the fluid flow flowing into the outlet circulation flow path 34 from the accommodating space 121 can meet the design requirement, meanwhile, the raw materials of the second outlet pipeline 342 can be reduced, and the production cost of the second outlet pipeline 342 is reduced, so that the production cost of the circulation flow path 3 is reduced, and the production cost of the cleaning equipment 100 is further reduced.

Other constructions and operations of the cleaning apparatus 100 according to embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present utility model, it should be understood that the terms "center," "length," "upper," "lower," "left," "right," "horizontal," "top," "bottom," "inner," "outer," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A cleaning apparatus, comprising:

the washing cavity assembly comprises a cavity body and a cavity bottom, the cavity bottom is connected to the bottom of the cavity body, the cavity body and the cavity bottom jointly define an accommodating space, a plurality of supporting ribs are arranged on the bottom wall of the cavity bottom, and the supporting ribs are distributed at intervals along the circumferential direction of the cavity bottom;

the fluid entering assembly penetrates through the bottom wall of the cavity bottom, the fluid entering assembly can rotate around the axis of the fluid entering assembly, and external fluid is suitable for entering the accommodating space through the fluid entering assembly.

2. The cleaning apparatus of claim 1, wherein each of the support ribs comprises a first rib section and a second rib section, the first rib section being connected to a side of the second rib section remote from the bottom wall of the cavity bottom, the second rib section being connected to the bottom wall of the cavity bottom, and outer peripheral surfaces of the first rib section and the second rib section each being formed as a cambered surface.

3. The cleaning apparatus according to claim 2, wherein an outer peripheral surface of the first bead section is formed as a cambered surface that protrudes in a direction away from a central axis of the first bead section; and/or

The outer peripheral surface of the second bead section is formed as a cambered surface recessed toward a direction adjacent to the central axis of the second bead section.

4. The cleaning apparatus of claim 1, wherein a plurality of the support ribs extend in a curve from inside to outside.

5. The cleaning apparatus defined in claim 4, wherein the outer ends of the plurality of ribs are offset from the radial direction of the cavity floor from the inside to the outside.

6. The cleaning apparatus of claim 1, wherein the chamber bottom includes a connecting wall connected between the bottom wall and the chamber body, the connecting wall being formed as a curved surface to achieve a rounded connection between the bottom wall and the chamber body.

7. The cleaning apparatus defined in claim 1, wherein the chamber body is a transparent member.

8. The cleaning apparatus defined in any one of claims 1-7, further comprising:

the circulating flow path is provided with an inlet and a plurality of outlets, the inlet and the outlets are communicated with the inside of the accommodating space, the outlets are arranged at intervals along the circumferential direction of the accommodating space, and the fluid inlet assembly is arranged at the inlet;

the fluid extraction assembly is arranged on the circulating flow path and is used for extracting fluid in the accommodating space.

9. The cleaning apparatus defined in claim 8, wherein the fluid extraction assembly comprises a fluid inlet and a fluid outlet;

the circulating flow path comprises an inlet circulating flow path and a plurality of outlet circulating flow paths, one end of the inlet circulating flow path is the inlet, the other end of the inlet circulating flow path is connected with the fluid outlet, one ends of the outlet circulating flow paths are respectively a plurality of outlets, and the other ends of the outlet circulating flow paths are connected with the fluid inlet.

10. The cleaning apparatus of claim 9, wherein the outlet circulation flow path comprises a first outlet conduit and a plurality of second outlet conduits, one end of the first outlet conduit being connected to a corresponding one of the outlets, the other end of the first outlet conduit being connected to the fluid inlet, one end of the plurality of second outlet conduits being connected to a plurality of the outlets, the other ends of the plurality of second outlet conduits being connected to the first outlet conduit, the second outlet conduits having a cross-sectional area that is less than the cross-sectional area of the first outlet conduit.

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