CN218096155U - Kitchen gas circulation system - Google Patents

Abstract

The application discloses kitchen gas circulation system includes: the unit cabinet comprises a cabinet wall, and the cabinet wall of the unit cabinet is surrounded to form an electric appliance accommodating cavity; the first air inlet is formed in the wall of the unit cabinet, so that the electric appliance accommodating cavity is communicated with a kitchen; the exhaust pipeline is communicated with the electric appliance accommodating cavity; exhaust fan sets up at the unit cashier's office in a shop, and exhaust fan includes the inlet end and gives vent to anger the end, and exhaust fan's inlet end communicates in exhaust duct, and exhaust fan's the end of giving vent to anger communicates in the outside of kitchen, and exhaust fan is used for introducing the gas in kitchen electrical apparatus holding chamber and discharges the gas in electrical apparatus holding chamber. The embodiment that this application provided realizes that the kitchen takes a breath and the electrical apparatus holding chamber of unit cabinet takes a breath to avoid kitchen air quality to descend, perhaps unit cabinet warp.

Description

Kitchen gas circulation system

Technical Field

The application relates to the technical field of kitchen gas circulation, in particular to a kitchen gas circulation system.

Background

At present, with the continuous increase of cooking requirements of people, the installation and use number of kitchen embedded appliances is increased, most of newly-installed embedded appliances are mainly installed in a unit cabinet, wherein the exhaust mode of the embedded appliances is mainly characterized by front exhaust, high-temperature and high-humidity flue gas generated during the operation of the embedded appliances can be discharged into a kitchen space, so that the air quality of a kitchen is reduced, or the unit cabinet can be deformed by waste heat generated during the operation of the embedded appliances and the working process.

SUMMERY OF THE UTILITY MODEL

This application provides a kitchen gas circulation system to the shortcoming of current mode for solve prior art and exist and lead to kitchen air quality to descend, perhaps embedded electrical apparatus and the waste heat that the phase working process produced can make the technical problem that the unit cabinet warp.

The embodiment of the application provides kitchen gas circulation system includes: the unit cabinet comprises a cabinet wall, and an electric appliance accommodating cavity is formed by enclosing the cabinet wall of the unit cabinet; the first air inlet is formed in the wall of the unit cabinet, so that the electric appliance accommodating cavity is communicated with a kitchen; the exhaust pipeline is communicated with the electric appliance accommodating cavity; the exhaust fan sets up the unit is on the cabinet, the exhaust fan includes the inlet end and gives vent to anger the end, the inlet end of exhaust fan communicate in exhaust duct, the end of giving vent to anger of exhaust fan communicate in the outside of kitchen, the exhaust fan be used for with the gas of kitchen is introduced the electrical apparatus holding chamber is discharged side by side the gas in electrical apparatus holding chamber.

As an alternative embodiment, the exhaust duct comprises: the first pipeline is communicated with the air inlet end of the exhaust fan; the exhaust seat is arranged on the unit cabinet; the second pipeline is communicated with the electric appliance accommodating cavity; the first pipeline, the exhaust seat and the second pipeline are communicated in sequence to exhaust gas in the electric appliance accommodating cavity.

As an alternative embodiment, the exhaust seat comprises an exhaust seat shell, and a first connecting pipe and a second connecting pipe which are communicated with the exhaust seat shell; the first connecting pipe is also communicated with the first pipeline; the second connecting pipe is also communicated with the second pipeline.

In an optional embodiment, a wall of the exhaust seat housing encloses to form an exhaust cavity, and the first connecting pipe and the second connecting pipe both protrude from the exhaust seat housing and communicate with the exhaust cavity; the top wall of the exhaust seat shell is provided with a second air inlet, the bottom wall of the unit cabinet is provided with a mounting hole, the exhaust seat shell is arranged in the mounting hole, and the exhaust cavity is communicated with the electric appliance accommodating cavity through the second air inlet.

In an alternative embodiment, the second air inlet hole is a plurality of second air inlet holes, and a plurality of second air inlet holes form a grid structure.

As an optional embodiment, the galley gas flow system further comprises: the gas collecting seat is arranged between the exhaust fan and the exhaust pipeline and comprises a gas collecting seat shell, a third connecting pipe and a fourth connecting pipe; the shell wall of the gas collecting seat shell is surrounded to form a gas collecting cavity, the third connecting pipe and the fourth connecting pipe both protrude out of the gas collecting seat shell, the third connecting pipe is respectively communicated with the gas collecting cavity and the air inlet end of the fan, and the fourth connecting pipe is respectively communicated with the gas collecting cavity and the first pipeline.

In an alternative embodiment, the third connecting pipe and the second pipeline are both circular pipes, and the diameter of the third connecting pipe is at least 1.5 times the diameter of the second pipeline.

In an alternative embodiment, the first connecting pipe and the second pipe are both circular pipes, and the diameter of the first connecting pipe is at least 1.5 times the diameter of the second pipe.

As an alternative embodiment, the galley gas circulation system comprises a plurality of the unit cabinets; the unit cabinets are arranged in sequence, the exhaust fan is arranged on the first unit cabinet, and the first unit cabinet is close to the outside of the kitchen.

As an alternative embodiment, the exhaust fan comprises: and the anti-downdraft device is fixedly connected to the air outlet end of the exhaust fan.

The application provides a kitchen gas circulation system, the technical scheme that the embodiment of this application provided brings following beneficial effect at least:

the exhaust fan introduces gas in a kitchen into the electric appliance containing cavity through the first air inlet hole and discharges the gas and waste gas (such as high-temperature and high-humidity flue gas) in the electric appliance containing cavity to the outside of the kitchen (such as a public flue), so that on one hand, the flue gas generated by the embedded electric appliance can be prevented from being directly discharged to the kitchen, and the air quality of the kitchen is ensured; on the other hand, the waste heat generated by the embedded electric appliance in the working state can be discharged to the outside of the kitchen, so that the deformation of the unit cabinet material caused by the fact that the waste heat is not discharged in time can be avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

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

FIG. 1 is a schematic diagram illustrating a positional relationship between a unit cabinet and a common flue in a kitchen gas circulation system according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram illustrating a positional relationship between a unit cabinet, an exhaust fan and a common flue in a kitchen gas circulation system according to an embodiment of the present disclosure;

FIG. 3 is a schematic bottom view of a kitchen gas flow system according to an exemplary embodiment of the present disclosure;

FIG. 4 is a schematic diagram of an exhaust seat of a kitchen air flow system according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a gas collecting seat in a kitchen gas circulation system according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram illustrating a connection relationship between an exhaust duct, an exhaust fan and a gas collecting seat in a kitchen gas circulation system according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of an exhaust fan in a kitchen gas circulation system according to an embodiment of the present disclosure.

Reference numerals and corresponding description

1: a unit cabinet; 11: a cabinet wall; 12: an electrical appliance accommodating cavity; 13: a first air intake hole;

2: an exhaust duct; 21: a first conduit; 22: an exhaust seat; 221: an exhaust seat housing; 222: a first connecting pipe; 223: a second connecting pipe; 224: a second air intake hole;

3: an exhaust fan; 31: an exhaust fan main body; 32: a transition housing; 33: a smoke collecting hood; 34: a smoke exhaust pipe; 35: a downdraft prevention device;

4: a gas collecting seat; 41: a gas collecting base shell; 42: a third connecting pipe; 43: a fourth connecting pipe;

5: a common flue.

Detailed Description

Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present application and are not construed as limiting the present application.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The following describes the technical solution of the present application and how to solve the above technical problems in detail by specific embodiments.

As shown in fig. 1 to 3 and 6, the present embodiment provides a kitchen air circulation system, which mainly includes a unit cabinet 1, a first air inlet 13, an exhaust duct 2, and an exhaust fan 3. The unit cabinet 1 comprises a cabinet wall 11, and the cabinet wall 11 of the unit cabinet 1 is enclosed to form an electrical appliance accommodating cavity 12; the first air inlet 13 is arranged on the cabinet wall 11 of the unit cabinet 1, so that the electric appliance accommodating cavity 12 is communicated with a kitchen; the exhaust pipeline 2 is communicated with the electric appliance accommodating cavity 12; exhaust fan 3 sets up on unit cabinet 1, and exhaust fan 3 includes the inlet end and gives vent to anger the end, and the inlet end of exhaust fan 3 communicates in exhaust duct 2, and the end of giving vent to anger of exhaust fan 3 communicates in the outside of kitchen, and exhaust fan 3 is used for introducing the gas in kitchen electrical apparatus holding chamber 12 and discharges the gas in electrical apparatus holding chamber 12.

In one possible embodiment, the cabinet wall 11 of the unit cabinet 1 mainly comprises a top wall, a bottom wall and side walls, which enclose an appliance housing cavity 12. The outside of unit cabinet 1 lower part is provided with the step line, and the bottom is equipped with the regulation foot. The first air intake holes 13 may be circular holes opened on the side walls of the unit cabinet 1. The electric appliance containing cavity 12 of the unit cabinet 1 is used for containing embedded electric appliances, and the embedded electric appliances can be kitchen electric appliances such as an oven, a steam box, a microwave oven, a dish washing machine, a disinfection cabinet, a refrigerator and the like. The exhaust duct 2 is disposed between the exhaust fan 3 and the appliance accommodating chamber 12, and gas (for example, exhaust gas, hot gas, and kitchen gas flowing into the appliance accommodating chamber 12 through the first air inlet 13) in the appliance accommodating chamber 12 flows through the exhaust duct 2 and the exhaust fan 3 in sequence and then is discharged out of the kitchen.

Through the kitchen gas circulation system provided by the embodiment of the application, the gas in a kitchen is introduced into the electric appliance containing cavity 12 through the first gas inlet 13 by the exhaust fan 3, and is discharged to the outside of the kitchen (such as the public flue 5) together with the waste gas (such as high-temperature and high-humidity flue gas) in the electric appliance containing cavity 12, on one hand, the flue gas generated by an embedded electric appliance can be prevented from being directly discharged to the kitchen, and therefore the air quality of the kitchen is ensured; on the other hand, the waste heat generated by the embedded electric appliance in the working state can be discharged to the outside of the kitchen, so that the deformation of the unit cabinet 1 material caused by the failure of timely discharging of the waste heat can be avoided.

As shown in fig. 3, the exhaust duct 2 includes a first duct 21, an exhaust seat 22 and a second duct (not shown) as an alternative embodiment. The first pipeline 21 is communicated with the air inlet end of the exhaust fan 3; the exhaust seat 22 is arranged on the unit cabinet 1; the second pipeline is communicated with the electric appliance accommodating cavity 12; wherein, the first pipeline 21, the exhaust seat 22 and the second pipeline are communicated in sequence to exhaust the gas in the electric appliance accommodating cavity 12.

In one possible embodiment, the first duct 21 and the second duct are disposed on the unit cabinet 1 through the exhaust seat 22, at least a portion of the first duct 21 is disposed outside the unit cabinet 1 and at the bottom of the unit cabinet 1, and at least a portion of the second duct may be disposed inside the unit cabinet 1. The air in the electric appliance accommodating cavity 12 flows in from the air inlet end of the second pipeline, flows through the exhaust seat 22 and the second pipeline in sequence, then is discharged out of the unit cabinet 1, and flows to the air inlet end of the exhaust fan 3.

As shown in fig. 4 and 5, as an alternative embodiment, the exhaust seat 22 includes an exhaust seat housing 221, and a first connection pipe 222 and a second connection pipe 223 communicated with the exhaust seat housing 221; wherein, the first connecting pipe 222 is also communicated with the first pipeline 21; the second connection pipe 223 is also communicated with the second pipe.

In one possible embodiment, the exhaust seat 22 is a housing structure to form a square exhaust seat housing 221, and the exhaust seat housing 221 is fixed to the bottom wall of the unit cabinet 1. A first connection pipe 222 is provided on a side wall or a bottom wall of the exhaust seat housing 221 for communicating with the first connection pipe 222 outside the unit cabinet 1; a second connection pipe 223 is provided on the top wall of the exhaust seat housing 221 for communicating with the second connection pipe 223 inside the unit cabinet 1.

As shown in fig. 4, as an alternative embodiment, the wall of the exhaust seat shell 221 encloses to form an exhaust cavity, and the first connection pipe 222 and the second connection pipe 223 both protrude from the exhaust seat shell 221 and are communicated with the exhaust cavity; wherein, the top wall of the exhaust seat shell 221 is provided with a second air inlet 224, the bottom wall of the unit cabinet 1 is provided with a mounting hole, the exhaust seat shell 221 is arranged in the mounting hole, and the exhaust cavity is communicated with the electric appliance accommodating cavity 12 through the second air inlet 224.

In one possible embodiment, the first connection pipe 222 and the second connection pipe 223 are protruded from the exhaust seat housing 221 to be sleeved with the first pipe 21 and the second pipe, respectively. Wherein, first pipeline 21 can the level set up, and the bottom of laminating unit cabinet 1, and the second pipeline can vertical setting, and the inlet end of second pipeline is kept away from exhaust seat casing 221, and the height of its self inlet end has been decided to the height of second pipeline promptly, and the inlet end of second pipeline can be close to the roof setting of unit to the gas on upper portion flows in the second pipeline in unit cabinet 1. The gas flowing from the second duct flows from the first connection pipe 222 to the first duct 21 after being buffered in the exhaust chamber. The mounting hole is opened in the through hole on the first unit cabinet 1 bottom wall, and the exhaust seat housing 221 is embedded in the mounting hole to expose the second air intake hole 224, so that the air in the lower part of the unit cabinet 1 flows into the exhaust chamber.

As shown in fig. 4, as an alternative embodiment, the second air intake holes 224 are plural, and the plural second air intake holes 224 form a lattice structure.

In one possible embodiment, the plurality of second intake holes 224 are distributed in an array to form a grill structure on the top wall of the exhaust seat housing 221.

As shown in fig. 5, as an alternative embodiment, the kitchen gas circulation system further includes a gas collecting seat 4, the gas collecting seat 4 is disposed between the exhaust fan 3 and the exhaust duct 2, and the gas collecting seat 4 includes a gas collecting seat housing 41, a third connecting pipe 42 and a fourth connecting pipe 43; the shell wall of the gas collecting seat shell 41 is enclosed to form a gas collecting cavity, the third connecting pipe 42 and the fourth connecting pipe 43 both protrude out of the gas collecting seat shell 41, the third connecting pipe 42 is respectively communicated with the gas collecting cavity and the air inlet end of the fan, and the fourth connecting pipe 43 is respectively communicated with the gas collecting cavity and the first pipeline 21.

In one possible embodiment, the gas collecting base 4 is a housing structure to form a square gas collecting base housing 41, and the gas flowing through the first connecting pipe 222 flows into the gas collecting base 4 for buffering and flows into the air inlet end of the exhaust fan 3. The third connecting pipe 42 and the fourth connecting pipe 43 protrude from the air collecting base housing 41, the third connecting pipe 42 is disposed on the top wall of the air collecting base housing 41 and is used for communicating with the air inlet end of the exhaust fan 3, and the fourth connecting pipe 43 is disposed on the side wall or the bottom wall of the air collecting base housing 41 and is used for communicating with the first connecting pipe 222 outside the unit cabinet 1.

In an alternative embodiment, the third connecting pipe 42 and the second pipe are circular pipes, and the diameter of the third connecting pipe 42 is at least 1.5 times the diameter of the second pipe.

As an alternative embodiment, the first connecting pipe 222 and the second pipe are both circular pipes, and the diameter of the first connecting pipe 222 is at least 1.5 times the diameter of the second pipe.

When the diameters of the third connection pipe 42, the first connection pipe 222, and the second pipe are reasonable sizes, the influence of the increase in the exhaust resistance caused by the overlong first pipe 21 or the overlong second pipe can be avoided.

As an alternative embodiment, as shown in fig. 1-2, the kitchen gas circulation system comprises a plurality of unit cabinets 1; wherein, a plurality of unit cabinets 1 arrange in proper order, and exhaust fan 3 sets up on first unit cabinet 1, and first unit cabinet 1 is close to the outside in kitchen.

In one possible embodiment, each unit cabinet 1 is equipped with an exhaust duct 2, and the air outlet ends of all the exhaust ducts 2 are communicated with the air collecting seat 4, so that the air in each unit cabinet 1 is collected at the air collecting seat 4 and then discharged by the oil exhaust fan 3.

As shown in fig. 7, as an alternative embodiment, the exhaust fan 3 includes a down-draft prevention device 35, and the down-draft prevention device 35 is fixedly connected to the air outlet end of the exhaust fan 3.

Optionally, the anti-blowback device 35 is an anti-blowback valve.

In one possible embodiment, the exhaust fan 3 includes an exhaust fan main body 31, a transition casing 32, a smoke collection hood 33, a smoke discharge pipe 34 and a down draft prevention device 35, which are connected in sequence. Wherein, the air inlet end of the exhaust fan 3 is the air inlet of the fan main body, the air outlet end of the exhaust fan 3 is the air outlet of the smoke exhaust pipe 34, and the air outlet of the smoke exhaust pipe 34 is communicated with the outside of the kitchen.

When the embedded electric appliance does not work, the exhaust fan 3 introduces gas in a kitchen from the first air inlet and realizes negative pressure ventilation of the electric appliance accommodating cavity 12 so as to avoid the reduction of the air quality of the kitchen and the air quality of the embedded electric appliance accommodating cavity 12; when the embedded electric appliance works normally, the exhaust fan 3 utilizes the negative pressure to introduce the gas in the kitchen from the first air inlet for replacement and exhaust, and utilizes the positive pressure exhaust capacity of the exhaust component of the embedded electric appliance to jointly realize the exhaust of the gas in the electric appliance accommodating cavity 12 to the outside of the kitchen.

As an alternative embodiment, the kitchen gas circulation system further comprises a common flue 5, and the common flue 5 is communicated with the gas outlet end of the exhaust fan 3.

In one possible embodiment, the common flue 5 is communicated with the first unit cabinet 1 through the exhaust fan 3, so that the flue gas and the waste heat energy of the embedded electric appliance can be quickly and intensively discharged to the common flue 5, and the flue gas and the waste heat energy are prevented from being too far away from the common flue 5, and the smoke quality is reduced.

It is understood that the same/similar parts among the various embodiments of the method described above in this specification can be referred to each other, and each embodiment focuses on the differences from the other embodiments, and where relevant, reference may be made to the description of the other method embodiments.

Those of skill in the art will understand that various operations, methods, steps in the flow, measures, schemes discussed in this application can be alternated, modified, combined, or deleted. Further, various operations, methods, steps, measures, schemes in the various processes, methods, procedures that have been discussed in this application may be alternated, modified, rearranged, decomposed, combined, or eliminated. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

The particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a few embodiments of the present application and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present application, and that these improvements and modifications should also be considered as the protection scope of the present application.

Claims (10)

1. A kitchen gas flow system, comprising:

the unit cabinet (1) comprises a cabinet wall (11), and the cabinet wall (11) of the unit cabinet (1) is enclosed to form an electric appliance accommodating cavity (12);

the first air inlet hole (13) is formed in the cabinet wall (11) of the unit cabinet (1) so that the electric appliance accommodating cavity (12) is communicated with a kitchen;

the exhaust pipeline (2) is communicated with the electric appliance accommodating cavity (12);

exhaust fan (3), set up on unit cabinet (1), exhaust fan (3) are including the inlet end with give vent to anger the end, the inlet end of exhaust fan (3) communicate in exhaust duct (2), the end of giving vent to anger of exhaust fan (3) communicate in the outside of kitchen, exhaust fan (3) be used for with the gas of kitchen is introduced electrical apparatus holding chamber (12) is discharged side by side the gas of electrical apparatus holding chamber (12).

2. Galley gas circulation system according to claim 1, characterized in that the exhaust duct (2) comprises:

the first pipeline (21) is communicated with the air inlet end of the exhaust fan (3);

an exhaust seat (22) provided on the unit cabinet (1);

the second pipeline is communicated with the electric appliance accommodating cavity (12);

the first pipeline (21), the exhaust seat (22) and the second pipeline are communicated in sequence to exhaust gas in the electric appliance accommodating cavity (12).

3. Kitchen gas circulation system according to claim 2,

the exhaust seat (22) comprises an exhaust seat shell (221), a first connecting pipe (222) and a second connecting pipe (223) which are communicated with the exhaust seat shell (221);

wherein the first connecting pipe (222) is also communicated with the first pipeline (21); the second connecting pipe (223) is also communicated with the second pipeline.

4. Kitchen gas flow-through system according to claim 3,

the shell wall of the exhaust seat shell (221) is surrounded to form an exhaust cavity, and the first connecting pipe (222) and the second connecting pipe (223) both protrude out of the exhaust seat shell (221) and are communicated with the exhaust cavity;

the top wall of the exhaust seat shell (221) is provided with a second air inlet hole (224), the bottom wall of the unit cabinet (1) is provided with a mounting hole, the exhaust seat shell (221) is arranged in the mounting hole, and the exhaust cavity is communicated with the electric appliance accommodating cavity (12) through the second air inlet hole (224).

5. Kitchen gas circulation system according to claim 4,

the number of the second air inlet holes (224) is multiple, and the multiple second air inlet holes (224) form a grid structure.

6. The galley gas circulation system according to claim 2, further comprising:

the air collecting seat (4) is arranged between the exhaust fan (3) and the exhaust pipeline (2), and the air collecting seat (4) comprises an air collecting seat shell (41), a third connecting pipe (42) and a fourth connecting pipe (43);

the shell wall of the gas collecting seat shell (41) is surrounded to form a gas collecting cavity, the third connecting pipe (42) and the fourth connecting pipe (43) protrude out of the gas collecting seat shell (41), the third connecting pipe (42) is respectively communicated with the gas collecting cavity and the air inlet end of the fan, and the fourth connecting pipe (43) is respectively communicated with the gas collecting cavity and the first pipeline (21).

7. Kitchen gas circulation system according to claim 6,

the third connecting pipe (42) and the second pipeline are both circular pipes, and the diameter of the third connecting pipe (42) is at least 1.5 times of that of the second pipeline.

8. The kitchen gas flow system of claim 4,

the first connecting pipe (222) and the second pipe are both circular pipes, and the diameter of the first connecting pipe (222) is at least 1.5 times of the diameter of the second pipe.

9. A galley gas circulation system according to claim 1, comprising a plurality of the unit cabinets (1);

the plurality of unit cabinets (1) are sequentially arranged, the exhaust fan (3) is arranged on the first unit cabinet (1), and the first unit cabinet (1) is close to the outside of the kitchen.

10. Galley gas circulation system according to claim 1, characterized in that the exhaust fan (3) comprises:

and the anti-downdraft device (35) is fixedly connected to the air outlet end of the exhaust fan (3).

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