CN212619574U - Refrigeration equipment with wind circulation, scattering and vibration device - Google Patents

Abstract

The utility model discloses refrigeration plant who has wind circulation and break up, vibrating device relates to food processing technology field, especially relates to quick-freeze food processing equipment. The utility model discloses a conveyer sets up in indoor one side of quick-freeze, include: the device comprises an inlet driven device, a conveying mesh belt and an outlet driving device; the inlet driven device and the outlet driving device are horizontally assembled on the inlet end and the outlet end of the quick-freezing chamber and are linked through a conveying mesh belt; the scattering device is arranged on the upper part of an upper layer conveying net belt on one side of the conveying device close to the inlet end in the quick-freezing chamber; the vibrating device is arranged at the lower part of the upper layer conveying net belt at the end of the conveying device close to the outlet in the quick-freezing chamber; the refrigerating device includes: an evaporation chamber, a motor, a centrifugal fan and an air duct chamber; the evaporation chamber is arranged on the horizontal opposite side of the conveying device through a bracket; the centrifugal fans are uniformly arranged at the upper part of the evaporation chamber; the motor of the centrifugal fan is in parallel key connection with the output shaft of the motor arranged outside the quick freezing chamber through a shaft extending out; the ADF defrosting system is arranged at the bottom of the evaporation chamber.

Description

Refrigeration equipment with wind circulation, scattering and vibration device

Technical Field

The utility model discloses refrigeration plant who has wind circulation and break up, vibrating device relates to food processing technology field, especially relates to quick-freeze food processing equipment.

Background

At present, the instant freezers are mainly classified into spiral instant freezers, tunnel instant freezers and fluidized instant freezers.

The spiral instant freezer adopts a spiral mode to convey products, has small occupied area and large freezing amount, and is mainly applied to the food quick freezing industry. The products in the spiral quick-freezer move along with the spiral rotary hub on the conveying net belt in a spiral mode, and most of the products are in a horizontal air supply mode, so that cold air can horizontally pass through the surface of the frozen products, and the products are cooled.

Tunnel type frozen machine adopts the structure that evaporimeter and fan are located the conveying mesh belt top more, adjusts horizontal wind direction into perpendicular wind direction through the guide plate, and the high-efficient tunnel type frozen machine that has risen in recent years adopts the nozzle form to blow the cold air after the throttle perpendicularly downwards to the food surface at a high speed, and then realizes quick cooling.

The fluidized quick freezer adopts two conveyer belts to convey food, and cold air blows through a food layer from bottom to top at the front section to quickly freeze the surface of the food, and the air volume is gradually increased to form a fluidized bed. In the second stage, a fluidized layer is generated to ensure free flow of the food, and deep freezing of the product is realized.

However, the above three types of instant freezers have the following disadvantages:

1. the horizontal blowing mode of the spiral instant freezer is easy to cause frozen products to generate horizontal displacement, and particularly for the frozen products of mixed particles, the situation that the frozen products are separated from a conveying mesh belt is easy to occur; the negative influence is generated to the indoor sanitary environment of the quick freezing chamber, the cleaning difficulty is increased, and the problem of product adhesion cannot be solved.

2. Tunnel type frozen machine because the evaporimeter return air inlet is located conveying mesh belt upper portion, especially to the frozen article of mixed particulate matter, is adsorbed on evaporimeter heat transfer fin easily, and reduction of production produces the pollution, can block up fin return air passageway when serious, increases equipment static pressure, leads to the phenomenon that the fan burns out.

3. Fluidization frozen machine wind direction is from the bottom of conveying guipure upwards blowing, and to the frozen article of mixed granule class, because its density is different, frozen article variation in size can lead to frozen article to be blown to fly, and frozen article depends on wind intracavity surface, easily produces the health hidden danger, increases the washing degree of difficulty.

4. In addition, for frozen products with high moisture content, particularly mixed particle frozen products, a large number of frost layers can be formed on fins of the evaporator along with cooling, the heat exchange efficiency of the evaporator is reduced due to the low heat conductivity of frost, and meanwhile, the return air space of the fins is further reduced along with the increase of the thickness of the frost layers, so that the static pressure is increased, the air speed is reduced, and the heat exchange efficiency is further reduced.

Aiming at the problems in the prior art, particularly for frozen products of mixed particles, the refrigeration equipment with the air circulation, scattering and vibration devices is designed and developed, so that the problems in the prior art are very necessary to be solved.

Disclosure of Invention

According to the problems that products in a quick-freezing chamber are easy to blow away, uneven to be cooled, easy to adhere and cake, low in production efficiency and the like in the prior art, the freezing equipment with the air circulation, scattering and vibration devices is provided, and therefore the purposes of improving the freezing effect of frozen products in the quick-freezing chamber, solving the adhesion and the cake of the products, improving the production efficiency, reducing the product loss and improving the heat exchange efficiency are achieved.

The utility model discloses a technical means as follows:

a refrigeration appliance having means for circulating and breaking up and vibrating air comprising: the system comprises a quick freezing chamber, a conveying device, a scattering device, a vibrating device, an ADF defrosting system and a refrigerating device;

furthermore, the quick freezing chamber is a heat preservation chamber formed by building heat preservation warehouse plates;

further, conveyer sets up in quick-freeze indoor one side, includes: the device comprises an inlet driven device, a conveying mesh belt and an outlet driving device; the inlet driven device and the outlet driving device are horizontally assembled on the inlet end and the outlet end of the quick-freezing chamber and are linked through a conveying mesh belt, the conveying mesh belt is divided into an upper layer and a lower layer, and a loop is formed by one inlet and one return; and a gear and a speed reducer are additionally arranged at two ends of the outlet driving device and the inlet driven device, and the whole conveying device is driven to operate by the rotation of the speed reducer.

Furthermore, the scattering device is arranged at the upper part of the upper layer conveying mesh belt on one side of the conveying device close to the inlet end in the quick-freezing chamber, and a small gap is formed between the scattering device and the conveying mesh belt along with the rotation of the scattering device;

further, the vibration device is arranged at the lower part of the upper layer conveying mesh belt at the end, close to the outlet, of the quick-freezing chamber of the conveying device, and is in intermittent contact with the conveying mesh belt along with the rotation of the vibration device;

further, the refrigeration apparatus includes: an evaporation chamber, a motor, a centrifugal fan and an air duct chamber;

furthermore, the main structure of the refrigerating device is arranged in the quick-freezing chamber and is parallel to the opposite side of the conveying device, and part of the structure is positioned at the upper part of the conveying device; wherein the evaporation chamber is arranged on the horizontal opposite side of the conveying device through a bracket; the interior of the evaporation chamber is communicated with the exterior through the bottom, and hot gas passing through the conveying device enters the evaporation chamber; the inlet end of the air channel chamber is arranged at the top of the evaporation chamber, and the outlet end of the air channel chamber is arranged at the upper part of the transmission device; the centrifugal fans are uniformly arranged at the upper part of the evaporation chamber and communicated with the inside of the evaporation chamber; the motor of the centrifugal fan is in parallel key connection with an output shaft of the motor arranged outside the quick freezing chamber through an extended shaft, and cold air flows onto food to be frozen through the designated air box through the rotation of the electric fan blade of the motor;

further, the ADF defrosting system is arranged at the bottom of the evaporation chamber.

Further, break up the device and adorn in conveyer and be close to the upper portion of the indoor entry end upper strata conveying mesh belt of quick-freeze, along with breaking up the device rotation, it forms tiny clearance with conveying mesh belt, breaks up the tiling to the inhomogeneous product of distribution on the entry end conveying mesh belt, prevents that the product from piling up the inhomogeneous and caking problem of cold volume that leads to receiving.

Furthermore, the vibrating device is arranged at the lower part of the upper layer of conveying mesh belt at the outlet end of the quick-freezing chamber close to the conveying device, two ends of a transmission shaft of the vibrating device are arranged between the two layers of conveying mesh belts through bearing seats and connected with a speed reducer, the vibrating device rotates under the driving of the speed reducer, the vibrating device and the conveying mesh belts are in intermittent contact with each other along with the rotation of the vibrating device, intermittent regular knocking is formed on the upper layer of conveying mesh belts, and then frozen products are vibrated and separated, so that the frozen products are uniformly distributed, and the caking phenomenon is further avoided.

Furthermore, a scraping plate made of a copper material is arranged beside the outlet driving device, and the residual products on the conveying net belt are scraped into the receiving plate through the scraping plate.

Furthermore, the air duct chamber is divided into a plurality of independent air cavities by the partition plates, the number of the air cavities is the same as that of the centrifugal fans, the air cavities are arranged in a pairwise corresponding mode, and the air volume of each air cavity is different according to actual conditions.

The air heated by the product is sucked into the evaporation chamber and cooled by the evaporation chamber after being converged by the air flowing through the conveying net belt and escaping from the escape channel of the air channel chamber, and then the air is sent into the air channel chamber by the centrifugal fan again, thereby completing one complete air flow circulation.

In addition, the whole unit adopts a method of externally arranging the motor, thereby reducing the volume in the warehouse and simultaneously reducing the cold energy consumed by the system for overcoming the heat dissipation of the motor.

In whole refrigeration cycle system, owing to freeze the product, the Air humidity after cold Air and product carry out the heat exchange is great, when the evaporating chamber bottom, frosts and freezes easily on bottom and evaporimeter fin, the utility model discloses add ADF Defroster (Air Defroster) in the evaporating chamber bottom, realize full-automatic spraying a pulsed, high pressure, deoiling, dry high-pressure gas.

Products to be frozen in the system enter the conveying mesh belt through the inlet end, and after the products are frozen for a period of time, the products of the particles are scattered and spread on the conveying mesh belt through the scattering device; the conveying mesh belt reaches the vibrating device after being conveyed for a period of time, the vibrating device is used for beating the upper conveying mesh belt intermittently and regularly, and the frozen products are vibrated and separated to be distributed uniformly so as to avoid the caking phenomenon; the flitch is scraped in conveying mesh belt conveyer's exit setting, scrapes the product on the conveying mesh belt, also prepares for conveying mesh belt's washing, the utility model discloses scrape the flitch and adopt the copper product matter very much to should scrape the flitch and can dismantle, so that scrape when having the friction loss between flitch and the conveying mesh belt, scrape the change of flitch, adopt the copper product matter can prevent to warp under the circumstances of freezing special products.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model provides a refrigeration plant with wind circulation and break up, vibrating device, the wind circulation system effect of spiral frozen machine and traditional tunnel type frozen machine is better, the utility model discloses a through the mode of food and conveying mesh belt side air-out and special design air current escape channel, such mode is more even than the air current return circuit that the horizontal air supply formed, and the product that just freezes is difficult to blow away to improve the indoor air current tissue of quick-freeze.

2. The utility model provides a refrigeration plant with wind circulation and break up, vibrating device, the result of use is better for traditional tunnel type frozen machine, when freezing graininess product, can not adsorb the product to the evaporimeter fin on, has avoided the problem that graininess product blockked up fin return air passageway to guarantee the normal use of fan, the life of extension equipment.

3. The utility model provides a refrigeration plant with wind circulation and break up, vibrating device, freezing effect for traditional fluidization frozen machine is better, and to freezing mixed particulate matter, the product that traditional fluidization frozen machine freezes out is cubic, and core temperature often can not reach the requirement, also influences the product quality simultaneously, and the utility model discloses in increased break up and vibrating device, the product that makes the system freeze out is the graininess, ensures to freeze effect and product quality, and the design of special air current tissue and ADF has also improved production efficiency.

4. The utility model provides a refrigeration plant with wind circulation and break up, vibrating device for above three kinds of frozen machines, adopt the external mode of motor, both reduced the system and consumed cold volume for overcoming motor heat dissipation, also avoided the motor oil leak to cause the hidden danger of pollution to the internal environment of quick-freeze room to reduce energy consumption, guaranteed indoor sanitation.

5. The utility model provides a refrigeration plant with wind circulation and break up, vibrating device increases an pulsed, high pressure, deoiling, dry ADF defrost system, has slowed down the formation on frost layer in evaporimeter bottom and fin surface, improves heat exchange efficiency, improves the air current static pressure, is showing extension equipment continuous operation duration to reach and reduce the defrosting frequency, practice thrift the cost, improve the purpose of productivity.

To sum up, use the technical scheme of the utility model the quick-freeze room air current that has solved the actual existence among the prior art organize poor, especially to mixing granule class product, the product has adhesion, caking phenomenon, production efficiency low, energy consumption big, receive cold inhomogeneous scheduling problem.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a side view of the present invention.

In the figure: 1. the system comprises an inlet driven device 2, a conveying mesh belt 3, a scattering device 4, a vibrating device 5, an outlet driving device 6, a scraping plate 7, an evaporation chamber 8, a motor 11, a centrifugal fan 12, an air channel chamber 13, a quick freezing chamber 14 and an ADF defrosting system.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in the figure, the utility model provides a refrigeration plant with wind circulation and break up, vibrating device includes: a quick freezing chamber 13, a conveying device, a scattering device 3, a vibrating device 4, an ADF defrosting system 14 and a refrigerating device;

the quick freezing chamber 13 is a heat preservation chamber built by heat preservation warehouse plates;

conveyer sets up in quick-freeze indoor one side, includes: an inlet driven device 1, a conveying mesh belt 2 and an outlet driving device 5; the inlet driven device 1 and the outlet driving device 5 are horizontally assembled on the inlet end and the outlet end of the quick-freezing chamber 13 and are linked through a conveying mesh belt 2, the conveying mesh belt 2 is divided into an upper layer and a lower layer, and a loop is formed by one inlet and one return; and a gear and a speed reducer are additionally arranged at two ends of the outlet driving device 5 and the inlet driven device 1, and the whole conveying mesh belt 2 is driven to run by the rotation of the speed reducer.

The scattering device 3 is arranged at the upper part of the upper layer conveying mesh belt 2 at one side of the conveying device close to the inlet end in the quick freezing chamber 13, and forms a tiny gap with the conveying mesh belt 2 along with the rotation of the scattering device 3;

the vibrating device 4 is arranged at the lower part of the upper layer conveying mesh belt 2 of the conveying device close to the outlet end in the quick-freezing chamber, and forms intermittent contact with the conveying mesh belt 2 along with the rotation of the vibrating device 4;

the refrigerating device includes: an evaporation chamber 7, a motor 8, a centrifugal fan 11 and an air duct chamber 12;

the main structure of the refrigerating device is arranged in the quick freezing chamber 13 and is parallel to the opposite side of the conveying device, and part of the structure is positioned at the upper part of the conveying device; wherein, the evaporation chamber 7 is arranged at the horizontal opposite side of the conveying device through a bracket; the inside of the evaporation chamber 7 is communicated with the outside through the bottom, and hot air passing through the conveying device enters the evaporation chamber 7; the inlet end of the air duct chamber 12 is arranged at the top of the evaporation chamber 7, and the outlet end is arranged at the upper part of the transmission device; a plurality of centrifugal fans 11 are uniformly arranged at the upper part of the evaporation chamber 7 and communicated with the inside of the evaporation chamber 7; a motor of the centrifugal fan 11 is in flat key connection with an output shaft of a motor 8 arranged outside the quick freezing chamber 13 through an extended shaft, and the motor 8 drives a fan blade to rotate so as to enable cold air to flow onto food to be frozen through a specified air box;

the ADF defrosting system 14 is provided at the bottom of the evaporation chamber 7.

The scattering device 3 is arranged on the upper part of the upper layer conveying mesh belt at the inlet end of the quick-freezing chamber, which is close to the conveying device, and the scattering device rotates along with the conveying mesh belt to form a small gap with the conveying mesh belt, so that uneven products distributed on the inlet end conveying mesh belt 2 are scattered and tiled, and the problems of uneven cooling capacity and caking caused by product accumulation are prevented.

The vibrating device 4 is arranged at the lower part of the upper layer conveying mesh belt at the outlet end of the quick-freezing chamber close to the conveying device, two ends of a transmission shaft of the vibrating device 4 are arranged between the two layers of conveying mesh belts through bearing seats and connected with a speed reducer, the vibrating device rotates under the driving of the speed reducer, the vibrating device rotates along with the rotation of the vibrating device, the vibrating device and the conveying mesh belt 2 are in intermittent contact, the upper layer conveying mesh belt 2 is in intermittent regular beating, frozen products are further vibrated and separated, the frozen products are distributed uniformly, and the caking phenomenon is further avoided.

A scraping plate 6 made of copper materials is arranged beside the outlet driving device 5, and products remained on the conveying mesh belt 2 are scraped into the receiving tray through the scraping plate 6.

The air duct chamber 12 is divided into a plurality of independent air chambers by partition plates, the number of the air chambers is the same as that of the centrifugal fans 11, the air chambers are arranged in a pairwise corresponding mode, and the air volume of each air chamber is different according to actual conditions.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (5)

1. A refrigeration apparatus having means for circulating and breaking up and vibrating air, said refrigeration apparatus having means for circulating and breaking up and vibrating air comprising: the system comprises a quick freezing chamber (13), a conveying device, a scattering device (3), a vibrating device (4), an ADF defrosting system (14) and a refrigerating device;

the quick freezing chamber (13) is a heat preservation chamber built by heat preservation warehouse plates;

conveyer set up in quick-freeze indoor one side, include: an inlet driven device (1), a conveying mesh belt (2) and an outlet driving device (5); the inlet driven device (1) and the outlet driving device (5) are horizontally assembled on the inlet end and the outlet end of the quick-freezing chamber (13) and are connected through a conveying mesh belt (2), the conveying mesh belt (2) is divided into an upper layer and a lower layer, and a loop is formed by one inlet and one return; a gear and a speed reducer are additionally arranged at two ends of the outlet driving device (5) and the inlet driven device (1), and the whole conveying mesh belt (2) is driven to run by the rotation of the speed reducer;

the scattering device (3) is arranged at the upper part of the upper layer conveying mesh belt (2) at one side of the conveying device close to the inlet end in the quick freezing chamber (13), and forms a micro gap with the conveying mesh belt (2) along with the rotation of the scattering device (3);

the vibrating device (4) is arranged at the lower part of the upper layer conveying mesh belt (2) at the end of the conveying device close to the outlet in the quick-freezing chamber, and forms intermittent contact with the conveying mesh belt (2) along with the rotation of the vibrating device (4);

the refrigerating device comprises: an evaporation chamber (7), a motor (8), a centrifugal fan (11) and an air duct chamber (12);

the main structure of the refrigerating device is arranged in the quick freezing chamber (13) and is parallel to the opposite side of the conveying device, and part of the structure is positioned at the upper part of the conveying device; wherein the evaporation chamber (7) is arranged on the horizontal opposite side of the conveying device through a bracket; the inside of the evaporation chamber (7) is communicated with the outside through the bottom, and hot air passing through the conveying device enters the evaporation chamber (7); the inlet end of the air duct chamber (12) is arranged at the top of the evaporation chamber (7), and the outlet end is arranged at the upper part of the transmission device; a plurality of centrifugal fans (11) are uniformly arranged at the upper part of the evaporation chamber (7) and communicated with the inside of the evaporation chamber (7); a motor of the centrifugal fan (11) is in parallel key connection with an output shaft of a motor (8) arranged outside the quick freezing chamber (13) through an extended shaft, and cold air flows onto food to be frozen through a designated air box through the rotation of an electric fan blade of the motor (8);

the ADF defrosting system (14) is arranged at the bottom of the evaporation chamber (7).

2. The refrigerating equipment with wind circulation, scattering and vibration device as claimed in claim 1, wherein said scattering device (3) is installed on the upper part of the upper layer of the conveyer belt near the inlet end of the quick-freezing chamber, and forms a tiny gap with the conveyer belt along with the rotation of the scattering device, so as to scatter and tile the products which are not uniformly distributed on the inlet end conveyer belt (2).

3. The refrigerating equipment with wind circulation, scattering and vibration device as claimed in claim 1, wherein the vibration device (4) is installed at the lower part of the upper layer of conveying mesh belt at the outlet end of the conveying device close to the quick-freezing chamber, the two ends of the transmission shaft of the vibration device (4) are installed between the two layers of conveying mesh belts through bearing seats and connected with a speed reducer, and the vibration device rotates under the driving of the speed reducer, and forms intermittent contact with the conveying mesh belt (2) along with the rotation of the vibration device, so as to form intermittent regular knocking for the upper layer of conveying mesh belt (2).

4. Refrigeration equipment with wind circulation and scattering and vibration device according to claim 2, characterized in that a scraping plate (6) made of copper material is arranged beside the outlet driving device (5), and the residual product on the conveyor belt (2) is scraped into the receiving tray through the scraping plate (6).

5. The refrigeration equipment with the air circulation, scattering and vibration device as claimed in claim 1, wherein the air channel chamber (12) is divided into a plurality of independent air cavities by partition plates, the number of the air cavities is the same as that of the centrifugal fans (11), the air cavities are arranged in pairs and correspond to each other, and the air volume of each air cavity is different according to actual conditions.

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