Gas circulation mechanism and kitchen waste treatment equipment

Abstract

The utility model belongs to the technical field of kitchen waste treatment equipment, and discloses a gas circulation mechanism and kitchen waste treatment equipment. The gas circulation mechanism comprises an inner circulation module and an outer circulation module. The inner circulation module comprises an inner circulation inlet pipe and an inner circulation outlet which are communicated, the inner circulation inlet pipe is communicated with the air outlet of the condensation module, and the inner circulation outlet is integrated in the switching space. The outer circulation module comprises an outer circulation air inlet pipe, an outer circulation air outlet pipe, an outer circulation inlet pipe, an outer circulation outlet pipe and a filtering assembly, the filtering assembly is arranged between the outer circulation air inlet pipe and the outer circulation air outlet pipe in a communicating mode, and the outer circulation inlet pipe and the outer circulation outlet pipe communicate with the outer circulation air inlet pipe and the outer circulation air outlet pipe correspondingly; and all the components are integrated in the switching space. The inner circulation outlet selectively communicates with the air inlet channel and the outer circulation inlet pipe, and the outer circulation outlet pipe selectively communicates with the air inlet channel. The gas circulation mechanism is compact in structure, saves arrangement space, reasonably distributes positions and circulation relations of all pipelines, and effectively improves gas circulation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen waste treatment equipment, in particular to a gas circulation mechanism and kitchen waste treatment equipment. Background Art

[0002] Kitchen waste generally includes both solid and liquid materials. When treating kitchen waste, it is generally necessary to cut and crush the solid materials and separate the solid materials from the liquid materials.

[0003] In the existing kitchen waste treatment device, a crushing component is arranged in the storage barrel to crush solid materials, and a fresh air filtering component is arranged to filter and circulate the gas in the storage barrel. However, the gas circulation loop of the existing kitchen waste treatment device is long and the layout is scattered, which is not conducive to saving space and improving the gas circulation efficiency.

[0004] Therefore, there is an urgent need for a gas circulation mechanism and kitchen waste treatment equipment to solve the above problems. Summary of the Utility Model

[0005] According to one aspect of the utility model, it aims to provide a gas circulation mechanism, the structure of which is compact, can save the layout space, and can reasonably distribute the positions and flow relationships of each pipeline, effectively improving the gas circulation efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The gas circulation mechanism is connected between the grinding cylinder and the condensation module of the kitchen waste treatment equipment. The steam in the grinding cylinder can enter the condensation module through the extraction duct and condense to form condensed water, and the gas flowing out of the condensation module can enter the grinding cylinder through the air inlet duct;

[0008] The gas circulation mechanism includes:

[0009] The internal circulation module includes an internally connected internal circulation inlet pipe and an internal circulation outlet. The internal circulation inlet pipe is connected to the air outlet of the condensation module, and the internal circulation outlet is integrated in the switching space between the extraction duct and the air inlet duct;

[0010] The external circulation module includes an external circulation air inlet pipe, an external circulation air outlet pipe, an external circulation inlet pipe, an external circulation outlet pipe and a filtering component. The filtering component is connected and arranged between the external circulation air inlet pipe and the external circulation air outlet pipe. The external circulation inlet pipe and the external circulation outlet pipe are respectively connected to the external circulation air inlet pipe and the external circulation air outlet pipe and are respectively integrated in the switching space;

[0011] The inner loop outlet is selectively connected to the air inlet duct and the outer loop inlet pipe, and the outer loop outlet pipe is selectively connected to the air inlet duct.

[0012] As a preferred embodiment of the gas circulation mechanism provided by the present invention, the outer loop inlet air duct and the outer loop outlet air duct are independent of each other and are partially stacked in the direction of gravity.

[0013] As a preferred embodiment of the gas circulation mechanism provided by the present invention, the outer loop inlet pipe and the outer loop outlet pipe are located above the grinding cylinder in the direction of gravity. The outer loop inlet air duct and the outer loop outlet air duct are both arranged at the rear end of the grinding cylinder and are bent to avoid the grinding cylinder.

[0014] As a preferred embodiment of the gas circulation mechanism provided by the present invention, the cross-sections of the outer loop inlet air duct and the outer loop outlet air duct are both rectangular.

[0015] As a preferred embodiment of the gas circulation mechanism provided by the present invention, the outer loop module further includes a first inlet air duct joint and a first outlet air duct joint. The first inlet air duct joint is connected and arranged at the inlet of the outer loop inlet air duct, and the first outlet air duct joint is connected and arranged at the outlet of the outer loop outlet air duct. The first inlet air duct joint and the first outlet air duct joint can be respectively inserted into the outer loop inlet pipe and the outer loop outlet pipe; and / or,

[0016] The outer loop module further includes a second inlet air duct joint and a second outlet air duct joint. The second inlet air duct joint is connected and arranged at the outlet of the outer loop inlet air duct, and the second outlet air duct joint is connected and arranged at the inlet of the outer loop outlet air duct. The second inlet air duct joint and the second outlet air duct joint can be respectively inserted into the filter inlet pipe and the filter outlet pipe of the filter assembly.

[0017] As a preferred embodiment of the gas circulation mechanism provided by the present invention, the filter assembly includes a housing and a filter core body. The filter core body is detachably arranged in the housing, and the filter inlet pipe and the filter outlet pipe are respectively integrated on the housing.

[0018] As a preferred embodiment of the gas circulation mechanism provided by the present invention, there are multiple filter core bodies, and the multiple filter core bodies are arranged in series.

[0019] As a preferred embodiment of the gas circulation mechanism provided by the present invention, the outer loop module further includes an outer loop fan. The outer loop fan is arranged between the outer loop inlet air duct and the filter assembly and can suck the circulating gas to the filter assembly; or,

[0020] The external circulation fan is arranged between the filter assembly and the external circulation air outlet pipe, and can suck the circulating gas to the filter assembly.

[0021] As a preferred solution of the gas circulation mechanism provided by the present invention, the internal circulation module further includes an internal circulation pipe, which is arranged at intervals between the external circulation air inlet pipe and the external circulation air outlet pipe and is connected between the internal circulation inlet pipe and the internal circulation outlet.

[0022] According to another aspect of the present invention, an object is to provide a kitchen waste treatment device, which includes the grinding cylinder, the condensation module and the air duct module. The air duct module includes the exhaust air duct and the intake air duct. The kitchen waste treatment device further includes the gas circulation mechanism according to any one of the above solutions.

[0023] The beneficial effects of the present invention:

[0024] The gas circulation mechanism provided by the present invention includes an internal circulation module and an external circulation module. The internal circulation module includes an internally connected internal circulation inlet pipe and an internal circulation outlet. The internal circulation inlet pipe is connected to the air outlet of the condensation module, and the internal circulation outlet is integrated into the switching space between the exhaust air duct and the intake air duct. The external circulation module includes an external circulation air inlet pipe, an external circulation air outlet pipe, an external circulation inlet pipe, an external circulation outlet pipe and a filter assembly. The filter assembly is connected and arranged between the external circulation air inlet pipe and the external circulation air outlet pipe. The external circulation inlet pipe and the external circulation outlet pipe are respectively connected to the external circulation air inlet pipe and the external circulation air outlet pipe and are respectively integrated into the switching space. That is to say, the circulating gas circulated back to the grinding cylinder through the external circulation module can be further deodorized under the action of the filter assembly, improving the deodorization effect of the circulating gas. The internal circulation outlet is selectively connected to the intake air duct and the external circulation inlet pipe, and the external circulation outlet pipe is selectively connected to the intake air duct. That is to say, in the switching space, the working states of the internal circulation module and the external circulation module can be selected. In the external circulation mode, the external circulation inlet pipe is connected to the internal circulation outlet, and the external circulation outlet pipe is connected to the intake air duct; in the internal circulation mode, the internal circulation outlet is connected to the intake air duct. By integrating the external circulation inlet, the external circulation outlet and the internal circulation outlet in one place, the structure of the gas circulation mechanism can be made compact, saving layout space, and the positions and flow relationships of each pipeline can be reasonably allocated, effectively improving the gas circulation efficiency. Description of the Drawings

[0025] Figure 1 is a partial structural schematic diagram of a kitchen waste treatment device provided by an embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the air duct module provided by an embodiment of the present invention;

[0027] Figure 3 It is a partial schematic view of the switching space of the kitchen waste treatment device provided by the embodiment of the present utility model in the internal circulation mode;

[0028] Figure 4 It is a partial schematic view of the switching space of the kitchen waste treatment device provided by the embodiment of the present utility model in the external circulation mode;

[0029] Figure 5 It is a partial structural decomposition schematic view of the kitchen waste treatment device provided by an embodiment of the present utility model;

[0030] Figure 6 It is a partial structural schematic view of the kitchen waste treatment device provided by another embodiment of the present utility model Figure 1 ;

[0031] Figure 7 It is a partial structural schematic view of the kitchen waste treatment device provided by another embodiment of the present utility model Figure 2 .

[0032] In the figure:

[0033] 10, grinding cylinder; 20, condensation module; 30, air duct module; 31, exhaust air duct; 32, intake air duct; 33, switching space; 34, first stop block; 35, second stop block; 36, first baffle; 37, second baffle; 40, condensation water tank; 50, switching device; 51, flap structure;

[0034] 100, internal circulation module; 110, internal circulation inlet pipe; 120, internal circulation outlet; 130, internal circulation pipe;

[0035] 200, external circulation module; 210, external circulation intake air pipe; 220, external circulation exhaust air pipe; 230, external circulation inlet pipe; 240, external circulation outlet pipe; 250, filtering component; 251, filtering inlet pipe; 252, filtering outlet pipe; 253, housing; 254, filter element; 261, first intake air pipe joint; 262, first exhaust air pipe joint; 263, second intake air pipe joint; 264, second exhaust air pipe joint; 270, external circulation fan. Detailed implementation manners

[0036] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0037] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the top of", and "on the upper surface of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the bottom of", and "on the lower surface of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0039] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", and "left" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] Figure 1 Shows a partial structural schematic diagram of a kitchen waste treatment device provided by an embodiment of the present utility model; Figure 2 Shows a schematic diagram of an air duct module provided by an embodiment of the present utility model; Figure 3 Shows a partial schematic diagram at the switching space of the kitchen waste treatment device provided by an embodiment of the present utility model in the internal circulation mode; Figure 4 Shows a partial schematic diagram at the switching space of the kitchen waste treatment device provided by an embodiment of the present utility model in the external circulation mode. Refer to Figures 1 - 4 , this embodiment provides a gas circulation mechanism and a kitchen waste treatment device.

[0041] Specifically, the kitchen waste treatment device includes the grinding cylinder 10, the condensation module 20, the air duct module 30, the condensation water tank 40, the device box body, and the gas circulation mechanism provided in this embodiment. The air duct module 30, the grinding cylinder 10, and the condensation water tank 40 are arranged in the device box body from top to bottom in the gravity direction. The condensation module 20 is arranged between the rear end of the grinding cylinder 10 and the rear cover of the device box body. The grinding cylinder 10 can crush and grind solid kitchen waste, and a heating device is arranged on the outer peripheral side of the grinding cylinder 10, which can heat the liquid kitchen waste in the grinding cylinder 10 to form steam.

[0042] More specifically, the air duct module 30 includes the exhaust air duct 31 and the intake air duct 32. The exhaust air duct 31 is connected between the grinding cylinder 10 and the condensation module 20. Steam can enter the condensation module 20 from the exhaust air duct 31 for condensation to form condensed water to dissolve odor substances. The condensation water tank 40 is connected to the water outlet of the condensation module 20 and can hold the condensed water. The gas circulation mechanism is specifically arranged between the air outlet of the condensation module 20 and the intake air duct 32 to circulate the gas flowing out of the condensation module 20 back to the grinding cylinder 10.

[0043] Continue to refer to Figures 1 - 5 As shown in, the gas circulation mechanism includes an internal circulation module 100 and an external circulation module 200. The internal circulation module 100 is arranged between the air outlet of the condensation module 20 and the switching space 33 between the exhaust air duct 31 and the intake air duct 32. In the internal circulation mode, the internal circulation module 100 can directly circulate the gas flowing out of the air outlet of the condensation module 20 back to the intake air duct 32 and then enter the grinding cylinder 10. The external circulation module 200 is arranged between the air outlet of the condensation module 20 and the switching space 33. In the external circulation mode, the external circulation module 200 can filter, adsorb, and deodorize the gas flowing out of the air outlet of the condensation module 20 again and then circulate it back to the intake air duct 32 and then enter the grinding cylinder 10.

[0044] Figure 5 shows a partial structural decomposition diagram of the kitchen waste treatment device provided by an embodiment of the present invention. Figure 6 shows a partial structure of the kitchen waste treatment device provided by another embodiment of the present invention. Figure 1 Refer to Figures 2 - 6 As shown in, the internal circulation module 100 includes an internally connected internal circulation inlet pipe 110, an internal circulation outlet 120, and an internal circulation pipe 130. The internal circulation inlet pipe 110 is connected to the air outlet of the condensation module 20 and is integrated on the condensation module 20. The internal circulation outlet 120 is integrated in the switching space 33. The internal circulation pipe 130 is specifically in an "L" shape and is connected between the internal circulation inlet pipe 110 and the internal circulation outlet 120.

[0045] Continue to refer to Figures 1 - 5The external circulation module 200 includes an external circulation air inlet pipe 210, an external circulation air outlet pipe 220, an external circulation inlet pipe 230, an external circulation outlet pipe 240 and a filter assembly 250. The filter assembly 250 is connected and arranged between the external circulation air inlet pipe 210 and the external circulation air outlet pipe 220, and the external circulation inlet pipe 230 and the external circulation outlet pipe 240 are respectively connected to the external circulation air inlet pipe 210 and the external circulation air outlet pipe 220, and are respectively integrated in the switching space 33.

[0046] Reference Figure 3 and Figure 4 The food waste treatment device provided in this embodiment further includes a switching device 50. The switching device 50 is disposed in the switching space 33 to realize the selective communication between the inner circulation outlet 120 and the air inlet duct 32 and the outer circulation inlet pipe 230, and to realize the selective communication between the outer circulation outlet pipe 240 and the air inlet duct 32.

[0047] Specifically, a first block 34, a second block 35, a first baffle 36 and a second baffle 37 are provided in the switching space 33. The first block 34 is provided between the inner circulation outlet 120 and the outer circulation inlet pipe 230. The second block 35 is opposite to and spaced from the first block 34, and is located between the outer circulation outlet pipe 240 and the inlet end of the air inlet duct 32. The first baffle 36 is provided between the inner circulation outlet 120 and the inlet end of the air inlet duct 32. The second baffle 37 is opposite to and spaced from the first baffle 36, and is located between the outer circulation inlet pipe 230 and the outer circulation outlet pipe 240. The rotating shaft of the switching device 50 is provided between the first block 34, the first baffle 36, the second block 35 and the second baffle 37.

[0048] More specifically, the switching device 50 includes a blocking piece structure 51 disposed on two sides of the rotating shaft thereof.

[0049] Reference Figure 3 When the switching device 50 rotates to the point where one baffle structure 51 abuts against the side of the first baffle block 34 away from the external circulation inlet pipe 230, and the other baffle structure 51 abuts against the side of the second baffle block 35 toward the external circulation outlet pipe 240, the two baffle structures 51 separate the external circulation inlet pipe 230 and the external circulation outlet pipe 240 from the entrance of the air inlet duct 32, and only the internal circulation outlet 120 is connected to the entrance of the air inlet duct 32. This is the internal circulation mode.

[0050] Reference Figure 4, when the switching device 50 rotates until one baffle structure 51 abuts against the side of the first baffle 36 facing the inner circulation outlet 120 and the other baffle structure 51 abuts against the side of the second baffle 37 facing the outer circulation outlet pipe 240, at this time the two baffle structures 51 cut off the inner circulation outlet 120 and the outer circulation inlet pipe 230 from the inlet of the air inlet duct 32, and only the outer circulation outlet pipe 240 is communicated with the inlet of the air inlet duct 32, and this is the outer circulation mode at this time.

[0051] Continue to refer to Figure 1 and Figure 5 , the outer circulation air inlet pipe 210 and the outer circulation air outlet pipe 220 are independent of each other and are partially stacked in the gravity direction. Through the above settings, the layout space occupied by the outer circulation air inlet pipe 210 and the outer circulation air outlet pipe 220 can be reduced.

[0052] Specifically, the outer circulation inlet pipe 230 and the outer circulation outlet pipe 240 are located above the grinding cylinder 10 in the gravity direction, the outer circulation air inlet pipe 210 and the outer circulation air outlet pipe 220 are both arranged at the rear end of the grinding cylinder 10 and are bent to avoid the grinding cylinder 10. The inner circulation pipe 130 is arranged at intervals between the outer circulation air inlet pipe 210 and the outer circulation air outlet pipe 220. Through the above settings, the layout rationality of the grinding cylinder 10, the outer circulation inlet pipe 230 and the outer circulation outlet pipe 240 in the equipment box body can be improved, the compactness of the structure can be enhanced, and the volume of the kitchen waste treatment equipment can be reduced.

[0053] More specifically, the outer circulation module 200 further includes a first air inlet pipe joint 261 and a first air outlet pipe joint 262. The first air inlet pipe joint 261 is integrally formed and communicated with the inlet of the outer circulation air inlet pipe 210, and the first air outlet pipe joint 262 is integrally formed and communicated with the outlet of the outer circulation air outlet pipe 220. The first air inlet pipe joint 261 and the first air outlet pipe joint 262 can be respectively inserted into the outer circulation inlet pipe 230 and the outer circulation outlet pipe 240 to quickly realize the assembly of the outer circulation inlet pipe 230 and the outer circulation outlet pipe 240 with the air duct module 30.

[0054] More specifically, the outer circulation module 200 further includes a second air inlet pipe joint 263 and a second air outlet pipe joint 264. The second air inlet pipe joint 263 is integrally formed and communicated with the outlet of the outer circulation air inlet pipe 210, and the second air outlet pipe joint 264 is integrally formed and communicated with the inlet of the outer circulation air outlet pipe 220. The second air inlet pipe joint 263 and the second air outlet pipe joint 264 can be respectively inserted into the filter inlet pipe 251 and the filter outlet pipe 252 of the filter assembly 250 to quickly realize the assembly of the outer circulation inlet pipe 230 and the outer circulation outlet pipe 240 with the filter assembly 250.

[0055] More specifically, the cross-sections of the first air inlet pipe joint 261, the first air outlet pipe joint 262, the second air inlet pipe joint 263, and the second air outlet pipe joint 264 are all circular, which can respectively match the outer circulation inlet pipe 230, the outer circulation outlet pipe 240, the filtration inlet pipe 251, and the filtration outlet pipe 252 with circular cross-sections, and facilitate insertion.

[0056] More specifically, the cross-sections of the outer circulation air inlet pipe 210 and the outer circulation air outlet pipe 220 are both rectangular. Through the above settings, the structural stability of the outer circulation air inlet pipe 210 and the outer circulation air outlet pipe 220 can be improved, and at the same time, it is convenient for manufacturing.

[0057] Figure 7 Schematic diagram of a partial structure of a kitchen waste treatment device provided by another embodiment of the present invention Figure 2 Refer to Figures 5 - 7 , the filtration assembly 250 includes a housing 253 and a filter element 254. The filter element 254 is detachably arranged in the housing 253, and the filtration inlet pipe 251 and the filtration outlet pipe 252 are respectively integrated on the housing 253.

[0058] Preferably, there are multiple filter elements 254, and multiple filter elements 254 are arranged in series. The filter element 254 can specifically be made of activated carbon material. Through the above settings, the circulating gas can be filtered and adsorbed at multiple levels, improving the deodorization effect.

[0059] Specifically, the outer circulation module 200 further includes an outer circulation fan 270. The outer circulation fan 270 is arranged between the filtration assembly 250 and the outer circulation air outlet pipe 220, as shown in Figure 1 and Figure 5 . The outer circulation fan 270 can suck the circulating gas to the filtration assembly 250. Through the above settings, the circulation efficiency of the circulating gas in the outer circulation mode can be effectively improved.

[0060] In another embodiment, the outer circulation fan 270 is arranged between the outer circulation air inlet pipe 210 and the filtration assembly 250, as shown in Figure 6 and Figure 7 . The installation position of the above outer circulation fan 270 can be selected according to the layout requirements of the actual structure, and this embodiment does not limit it here.

[0061] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A gas circulation mechanism, characterized in that: connected between a grinding cylinder (10) and a condensation module (20) of a food waste treatment device, the steam in the grinding cylinder (10) can enter the condensation module (20) through an exhaust duct (31) and condense to form condensed water, and the gas flowing out of the condensation module (20) can enter the grinding cylinder (10) through an air inlet duct (32); The gas circulation mechanism comprises: An internal circulation module (100) comprises an internal circulation inlet pipe (110) and an internal circulation outlet (120) which are connected to each other, wherein the internal circulation inlet pipe (110) is connected to the air outlet of the condensing module (20), and the internal circulation outlet (120) is integrated in a switching space (33) between the exhaust duct (31) and the air inlet duct (32); An external circulation module (200), comprising an external circulation air inlet pipe (210), an external circulation air outlet pipe (220), an external circulation inlet pipe (230), an external circulation outlet pipe (240) and a filter assembly (250), wherein the filter assembly (250) is arranged in communication between the external circulation air inlet pipe (210) and the external circulation air outlet pipe (220), and the external circulation inlet pipe (230) and the external circulation outlet pipe (240) are respectively connected to the external circulation air inlet pipe (210) and the external circulation air outlet pipe (220), and are respectively integrated in the switching space (33); The internal circulation outlet (120) is selectively connected to the air inlet duct (32) and the external circulation inlet pipe (230), and the external circulation outlet pipe (240) is selectively connected to the air inlet duct (32).

2. The gas circulation mechanism according to claim 1, characterized in that: The external circulation air inlet pipe (210) and the external circulation air outlet pipe (220) are independent of each other and are partially stacked in the direction of gravity.

3. The gas circulation mechanism according to claim 1, characterized in that: The external circulation inlet pipe (230) and the external circulation outlet pipe (240) are located above the grinding cylinder (10) in the direction of gravity, and the external circulation air inlet pipe (210) and the external circulation air outlet pipe (220) are both arranged at the rear end of the grinding cylinder (10) and bent to avoid the grinding cylinder (10).

4. The gas circulation mechanism according to claim 1, characterized in that: The cross-sections of the external circulation air inlet pipe (210) and the external circulation air outlet pipe (220) are both rectangular.

5. The gas circulation mechanism according to claim 1, characterized in that: The external circulation module (200) further comprises a first air inlet pipe joint (261) and a first air outlet pipe joint (262), wherein the first air inlet pipe joint (261) is connected to the inlet of the external circulation air inlet pipe (210), and the first air outlet pipe joint (262) is connected to the outlet of the external circulation air outlet pipe (220), and the first air inlet pipe joint (261) and the first air outlet pipe joint (262) can be plugged into the external circulation inlet pipe (230) and the external circulation outlet pipe (240) respectively; and / or, The external circulation module (200) further comprises a second air inlet pipe joint (263) and a second air outlet pipe joint (264); the second air inlet pipe joint (263) is connected to the outlet of the external circulation air inlet pipe (210); the second air outlet pipe joint (264) is connected to the inlet of the external circulation air outlet pipe (220); the second air inlet pipe joint (263) and the second air outlet pipe joint (264) can be respectively plugged into the filter inlet pipe (251) and the filter outlet pipe (252) of the filter assembly (250).

6. The gas circulation mechanism according to claim 5, characterized in that: The filter assembly (250) comprises a housing (253) and a filter core (254); the filter core (254) is detachably disposed in the housing (253); and the filter inlet pipe (251) and the filter outlet pipe (252) are respectively integrated in the housing (253).

7. The gas circulation mechanism according to claim 6, characterized in that: There are multiple filter core bodies (254), and the multiple filter core bodies (254) are arranged in series.

8. The gas circulation mechanism according to claim 1, characterized in that: The external circulation module (200) further comprises an external circulation fan (270), wherein the external circulation fan (270) is arranged between the external circulation air inlet pipe (210) and the filter assembly (250), and is capable of sucking circulating gas into the filter assembly (250); or, The external circulation fan (270) is disposed between the filter assembly (250) and the external circulation air outlet pipe (220), and is capable of sucking circulating gas into the filter assembly (250).

9. The gas circulation mechanism according to any one of claims 1 to 8, characterized in that: The internal circulation module (100) further comprises an internal circulation pipe (130), wherein the internal circulation pipe (130) is arranged at intervals between the external circulation air inlet pipe (210) and the external circulation air outlet pipe (220), and is connected between the internal circulation inlet pipe (110) and the internal circulation outlet (120).

10. A food waste treatment device, characterized in that: The kitchen waste processing device comprises the grinding cylinder (10), the condensation module (20) and the air duct module (30), wherein the air duct module (30) comprises the exhaust duct (31) and the air inlet duct (32), and the kitchen waste processing device further comprises the gas circulation mechanism according to any one of claims 1 to 9.

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