Switching device, gas circulation module and kitchen waste treatment equipment

Abstract

The utility model belongs to the technical field of garbage treatment equipment, and discloses a switching device, a gas circulation module and kitchen garbage treatment equipment. The switching device comprises a switching mechanism, a driving mechanism and an induction mechanism. The switching mechanism is rotationally arranged in a switching space among an outer circulation module, an inner circulation module and an air duct of the kitchen waste treatment equipment, and the outer circulation module and the inner circulation module can selectively communicate with the air duct through rotation of the switching mechanism. The driving mechanism is coaxially arranged on the switching mechanism, and the switching mechanism can be driven by the driving mechanism to rotate. The driving mechanism can trigger the induction mechanism, and the induction mechanism can sense the communication relation between the outer circulation module and the air duct and between the inner circulation module and the air duct. The switching device can improve the flexibility of gas circulation mode selection of the kitchen waste treatment equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of garbage processing equipment, and in particular to a switching device, a gas circulation module and kitchen waste processing equipment. Background Art

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

[0003] The kitchen waste treatment device in the prior art is provided with a crushing component in the storage barrel to crush the solid materials, a blowing system is provided to blow and dry the crushed solid materials, and a fresh air filter component is provided to filter and circulate the gas discharged from the storage barrel. However, when the kitchen waste treatment device is ventilating the gas in the storage barrel, it only has one way of using the fresh air filter component to achieve gas filtering and circulation. The deodorization effect of the above method is limited, and the gas circulation method cannot be flexibly selected according to the needs of the treatment process. Therefore, the gas circulation flexibility of the existing kitchen waste treatment device is poor.

[0004] Therefore, there is an urgent need for a switching device, a gas circulation module and a food waste processing device to solve the above problems. Utility Model Content

[0005] According to one aspect of the utility model, an object is to provide a switching device, which can enhance the flexibility of selecting a gas circulation mode of a food waste treatment device.

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

[0007] A switching device is integrated in an air duct, the air duct is connected to a grinding cylinder of a food waste treatment device, the food waste treatment device comprises an external circulation module and an internal circulation module selectively connected to the air duct, and the switching device is arranged between the external circulation module, the internal circulation module and the air duct;

[0008] The switching device comprises:

[0009] A switching mechanism is rotatably disposed in a switching space between the external circulation module, the internal circulation module and the air duct, and the external circulation module and the internal circulation module are selectively connected to the air duct through the rotation of the switching mechanism;

[0010] A driving mechanism, coaxially arranged on the switching mechanism, wherein the switching mechanism can rotate under the drive of the driving mechanism;

[0011] The sensing mechanism is capable of being triggered by the driving mechanism, and the sensing mechanism is capable of sensing the connection relationship between the outer circulation module, the inner circulation module and the air duct.

[0012] As a preferred solution of the switching device provided by the utility model, the driving mechanism includes a driving member and an abutment member, and the abutment member is arranged on the side of the driving member;

[0013] The sensing mechanism comprises an outer circulation sensing component and an inner circulation sensing component which are arranged at intervals along the circumferential direction on the circumferential side of the driving member, the outer circulation module is connected to the air duct, and the outer circulation sensing component is triggered to work; the inner circulation sensing component is connected to the air duct, and the inner circulation sensing component is triggered to work;

[0014] The abutment member is located between the outer circulation sensing component and the inner circulation sensing component, and can abut against the inner circulation sensing component or the outer circulation sensing component as the driving member rotates to trigger the inner circulation sensing component to work, or trigger the outer circulation sensing component to work.

[0015] As a preferred solution of the switching device provided by the utility model, the external circulation sensing component includes an external circulation sensor and a first elastic sheet, the first elastic sheet is movably arranged on the external circulation sensor, and the first elastic sheet can press the switch of the external circulation sensor under the abutment of the abutment member;

[0016] The internal circulation sensing component includes an internal circulation sensor and a second elastic sheet, wherein the second elastic sheet is movably arranged on the internal circulation sensor, and the second elastic sheet can press the switch of the internal circulation sensor under the abutting action of the abutting member.

[0017] As a preferred solution of the switching device provided by the utility model, the driving mechanism also includes a shell, which is fixedly arranged relative to the outer circulation sensing component and the inner circulation sensing component and is covered above the driving member, and the driving member can rotate relative to the shell.

[0018] As a preferred solution of the switching device provided by the utility model, the switching mechanism includes a baffle structure and a rotating drum, the baffle structure is fixedly connected to the side of the rotating drum, the rotating drum is coaxially connected to the driving mechanism, and can rotate under the drive of the driving mechanism, the baffle structure rotates with the rotating drum, and can block the external circulation module and the air duct and connect the internal circulation module and the air duct; or, connect the external circulation module and the air duct and block the internal circulation module and the air duct.

[0019] According to another aspect of the utility model, the purpose is to provide a gas circulation module, which includes a duct bottom plate and a duct top plate that are interlocked to form an air duct, and also includes a switching device as described in any of the above schemes; the switching mechanism is arranged between the duct bottom plate and the duct top plate, the driving mechanism and the sensing mechanism are respectively arranged on the side of the duct top plate away from the air duct, and the driving mechanism and the switching mechanism are coaxially connected through the duct top plate.

[0020] As a preferred solution of the gas circulation module provided by the utility model, the air duct includes an exhaust duct and an air inlet duct, the exhaust duct and the air inlet duct are respectively connected to the grinding cylinder, the external circulation module and the internal circulation module are arranged between the exhaust duct and the air inlet duct, and the switching space is arranged at the entrance of the air inlet duct.

[0021] As a preferred solution of the gas circulation module provided by the utility model, a support frame is provided on the side of the duct top plate away from the duct, the support frame is circumferentially arranged above the rotating shaft of the switching mechanism, and the driving mechanism is arranged on the support frame.

[0022] According to another aspect of the present invention, an object is to provide a food waste processing device, the food waste processing device comprising the grinding cylinder, the external circulation module, the internal circulation module, a heating device, a condensing device and a gas circulation module as described in any one of the above solutions;

[0023] The grinding cylinder is capable of crushing solid materials in kitchen waste;

[0024] The heating device is disposed outside the grinding cylinder and is capable of heating the kitchen waste so that the liquid material in the kitchen waste turns into steam;

[0025] The condensing device is disposed at the rear end of the air duct, connected to the grinding cylinder through the external circulation module or the internal circulation module, and is configured to condense the steam to form condensed water;

[0026] The air duct is selectively connected to the external circulation module and the internal circulation module.

[0027] As a preferred solution of the food waste processing equipment provided by the utility model, the food waste processing equipment further comprises a filtering module, the filtering module is integrated in the external circulation module, and the filtering module is configured to adsorb and deodorize the circulating gas of the grinding cylinder.

[0028] Beneficial effects of the utility model:

[0029] The switching device provided by the utility model includes a switching mechanism, a driving mechanism and a sensing mechanism. The switching mechanism is rotatably arranged in the switching space between the external circulation module, the internal circulation module and the air duct of the food waste treatment equipment, and the external circulation module and the internal circulation module can be selectively connected to the air duct through the rotation of the switching mechanism. The driving mechanism is coaxially arranged on the switching mechanism, and the switching mechanism can rotate under the drive of the driving mechanism. The driving mechanism can trigger the sensing mechanism, and the sensing mechanism can sense the connection relationship between the external circulation module and the internal circulation module and the air duct. In other words, through the above-mentioned switching mechanism, the flexibility of the gas circulation of the food waste treatment equipment can be improved. Through the above-mentioned sensing mechanism, it is possible to accurately judge and timely sense whether the food waste treatment equipment is in the internal circulation mode or the external circulation mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a partial structural diagram of the kitchen waste processing equipment provided by the embodiment of the utility model Figure 1 ;

[0031] Figure 2 This is a partial structural diagram of the kitchen waste processing equipment provided by the embodiment of the utility model Figure 2 ;

[0032] Figure 3 yes Figure 2 A partial enlarged view of the structure marked as A;

[0033] Figure 4 This is a partial structural exploded diagram of the kitchen waste processing equipment provided by the utility model;

[0034] Figure 5 yes Figure 4 A partial enlarged view of the structure marked as B;

[0035] Figure 6 is a schematic diagram of the gas circulation module provided in this embodiment in an internal circulation mode;

[0036] Figure 7 yes Figure 6 A partial enlarged view of the structure marked as C;

[0037] Figure 8 is a schematic diagram of the gas circulation module provided in this embodiment in an external circulation mode;

[0038] Fig. 9 yes Figure 8 A partial enlarged view of the structure marked with D.

[0039] In the figure:

[0040] 1. Grinding cylinder; 2. External circulation module; 21. External circulation air inlet; 22. External circulation air outlet; 3. Condensation device; 4. Filter module; 5. Heating device; 6. Water tank; 71. Internal circulation air outlet;

[0041] 10. Switching space; 11. First stopper; 12. First baffle; 13. Second stopper; 14. Second baffle; 20. Air duct bottom plate; 30. Air duct top plate; 31. Support frame; 32. Connecting column; 40. Air duct; 50. Air inlet;

[0042] 100, switching mechanism; 110, baffle structure; 120, rotating drum;

[0043] 200, driving mechanism; 210, abutment member; 220, housing; 221, connecting ear plate;

[0044] 300, sensing mechanism; 310, external circulation sensing component; 311, external circulation sensor; 312, first spring piece; 320, internal circulation sensing component; 321, internal circulation sensor; 322, second spring piece. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] Figure 1 A schematic diagram showing a partial structure of a kitchen waste treatment device provided by an embodiment of the utility model Figure 1 ; Figure 2 A schematic diagram showing a partial structure of a kitchen waste treatment device provided by an embodiment of the utility model Figure 2 ; Figure 3 Show Figure 2 A partial enlarged view of the structure marked as A; Figure 4 A partial structural exploded view of the kitchen waste processing device provided by the utility model is shown; Figure 5 Show Figure 4 A partial enlarged view of the structure marked as B. Figure 1-Figure 5 , this embodiment provides a switching device, a gas circulation module and a food waste processing device.

[0050] Reference Figure 1 and Figure 2 The kitchen waste treatment equipment includes a grinding cylinder 1, an external circulation module 2, an internal circulation module, a heating device 5, a condensing device 3 and a gas circulation module provided in this embodiment. The grinding cylinder 1 can crush solid materials in the kitchen waste. The heating device 5 is arranged outside the grinding cylinder 1, and can heat the kitchen waste so that the liquid materials in the kitchen waste form steam. In this embodiment, the heating device 5 can specifically be a heating tube.

[0051] Figure 6 A schematic diagram showing the gas circulation module provided in this embodiment in an internal circulation mode; Figure 7 Show Figure 6 A partial enlarged view of the structure marked as C; Figure 8 A schematic diagram showing the gas circulation module provided in this embodiment in an external circulation mode; Fig. 9 Show Figure 8 The gas circulation module includes an air duct bottom plate 20 and an air duct top plate 30 which are interlocked to form an air duct. The air duct includes an air exhaust duct 40 and an air inlet duct 50, and the air exhaust duct 40 and the air inlet duct 50 are respectively connected to the air exhaust port and the air inlet port of the grinding cylinder 1. The external circulation module 2 and the internal circulation module are arranged between the air exhaust duct 40 and the air inlet duct 50.

[0052] Specifically, the gas circulation module further includes a switching device provided in this embodiment. A switching space 10 is provided at the entrance of the air inlet duct 50, and the switching device is provided in the switching space 10. That is, the switching device is provided between the external circulation module 2, the internal circulation module and the air duct, and the external circulation module 2 and the internal circulation module can be selectively connected to the air inlet duct 50 through the switching device.

[0053] More specifically, the condensing device 3 is configured to condense the steam to form condensed water. The condensing device 3 is specifically arranged at the rear end of the air duct, connected to the exhaust duct 40, and connected to the air inlet duct 50 through the external circulation module 2 or through the internal circulation module. The steam formed by the liquid material in the grinding cylinder 1 can enter the condensing device 3 from the exhaust port and the exhaust duct 40 for condensation, and a part of the odor can be dissolved in the condensed water.

[0054] More specifically, the food waste treatment device further comprises a water tank 6. The water tank 6 is arranged below the grinding cylinder 1 in the direction of the middle gravity, and is connected to the condensation device 3, and the condensed water can flow into the water tank 6 for collection.

[0055] More specifically, the food waste processing equipment also includes a filter module 4. The filter module 4 is integrated in the external circulation module 2, and the filter module 4 is configured to adsorb and deodorize the circulating gas of the grinding cylinder 1. The external circulation module 2 includes an external circulation air inlet pipe and an external circulation air outlet pipe, and the external circulation air inlet 21 of the external circulation air inlet pipe and the external circulation air outlet 22 of the external circulation air outlet pipe are respectively integrated in the switching space 10. The filter module 4 is specifically arranged between the outlet of the external circulation air inlet pipe and the inlet of the external circulation air outlet pipe. The filter module 4 can adsorb and deodorize the gas entering from the external circulation air inlet 21, and then discharge the deodorized gas to the switching space 10 through the external circulation air outlet pipe and the external circulation air outlet 22.

[0056] More specifically, the internal circulation module includes an internal circulation pipe (not shown), the internal circulation air inlet (not shown) of the internal circulation pipe is connected to the air outlet of the condensing device 3, and the internal circulation air outlet 71 of the internal circulation pipe is integrated in the switching space 10. The condensed water generated by the condensing device 3 dissolves a part of the odor, and the remaining gas can enter the internal circulation air inlet from the air outlet of the condensing device 3, and then be discharged to the switching space 10 from the internal circulation air outlet 71.

[0057] Continue to refer to Figure 3-Figure 9, the switching device includes a switching mechanism 100, a driving mechanism 200 and a sensing mechanism 300. The switching mechanism 100 is arranged between the air duct bottom plate 20 and the air duct top plate 30, and is rotatably arranged in the switching space 10. The external circulation module 2 and the internal circulation module are selectively connected to the air inlet 50 through the rotation of the switching mechanism 100. The driving mechanism 200 and the sensing mechanism 300 are respectively arranged on the side of the air duct top plate 30 away from the air duct. The driving mechanism 200 and the switching mechanism 100 are coaxially connected through the air duct top plate 30, and the switching mechanism 100 can rotate under the drive of the driving mechanism 200. Through the switching mechanism 100, the flexibility of the gas circulation of the kitchen waste treatment equipment can be improved. The driving mechanism 200 can trigger the sensing mechanism 300, and the sensing mechanism 300 can sense the connection relationship between the external circulation module 2 and the internal circulation module and the air duct. Through the sensing mechanism 300, it is possible to accurately judge and timely sense whether the food waste treatment device is in the internal circulation mode or the external circulation mode.

[0058] Specifically, the switching mechanism 100 includes a baffle structure 110 and a rotating drum 120. The baffle structures 110 are specifically two, and the two baffle structures 110 are respectively fixedly connected to opposite sides of the circumference of the rotating drum 120. The rotating drum 120 is coaxially connected to the driving mechanism 200 and can rotate under the drive of the driving mechanism 200. The baffle structure 110 rotates to the first position along with the rotating drum 120, and can separate the entrance of the air inlet duct 50 from the external circulation air inlet 21 and the external circulation air outlet 22, and connect the internal circulation air outlet 71 with the entrance of the air inlet duct 50, at this time it is an internal circulation mode; the baffle structure 110 rotates to the second position along with the rotating drum 120, and can separate the entrance of the air inlet duct 50 from the external circulation air inlet 21 and connect the internal circulation air outlet 71 and the external circulation air inlet 21, and separate the internal circulation air outlet 71 from the entrance of the air inlet duct 50, and connect the external circulation air inlet 21, at this time it is an external circulation mode.

[0059] More specifically, refer to Figure 6-Figure 9 , a first block 11, a first baffle 12, a second block 13 and a second baffle 14 are provided in the switching space 10. The first block 11 is provided between the inner circulation air outlet 71 and the outer circulation air inlet 21; the second block 13 is opposite to the first block 11 and is arranged at a distance, and is located between the outer circulation air outlet 22 and the inlet end of the air inlet 50. The first baffle 12 is provided between the inner circulation air outlet 71 and the inlet end of the air inlet 50; the second baffle 14 is opposite to the first baffle 12 and is arranged at a distance, and is located between the outer circulation air inlet 21 and the outer circulation air outlet 22. The rotating shaft of the switching mechanism 100 is provided between the first block 11, the first baffle 12, the second block 13 and the second baffle 14.

[0060] like Figure 6 and Figure 7 As shown, when the switching mechanism 100 rotates to the point where one baffle structure 110 abuts against the side of the first baffle block 11 away from the external circulation air inlet 21, and the other baffle structure 110 abuts against the side of the second baffle block 13 toward the external circulation air outlet 22, the two baffle structures 110 separate the external circulation air inlet 21 and the external circulation air outlet 22 from the entrance of the air inlet duct 50, and only the internal circulation air outlet 71 is connected to the entrance of the air inlet duct 50, which is the internal circulation mode.

[0061] In the internal circulation mode, the steam in the grinding cylinder 1 enters the exhaust duct 40, and then enters the condensation device 3 for condensation, the condensed water is recovered in the water tank 6, the gas enters the internal circulation air inlet from the air outlet of the condensation device 3, and then is discharged from the internal circulation air outlet 71 to the switching space 10, and then enters the grinding cylinder 1 through the air inlet duct 50. In the above process, part of the odor in the grinding cylinder 1 is dissolved in the condensed water, achieving the basic requirement of deodorization of the circulating gas.

[0062] like Figure 8 and Fig. 9 As shown, when the switching mechanism 100 rotates to the point where one baffle structure 110 abuts against the first baffle plate 12 toward the side of the inner circulation air outlet 71, and the other baffle structure 110 abuts against the second baffle plate 14 toward the side of the outer circulation air outlet 22, the two baffle structures 110 separate the inner circulation air outlet 71 and the outer circulation air inlet 21 from the entrance of the air inlet duct 50, and only the outer circulation air outlet 22 is connected to the entrance of the air inlet duct 50, which is the outer circulation mode.

[0063] In the external circulation mode, the steam in the grinding cylinder 1 enters the exhaust duct 40, and then enters the condensation device 3 for condensation, and the condensed water is recovered in the water tank 6. The gas enters the internal circulation air inlet from the air outlet of the condensation device 3, and then is discharged from the internal circulation air outlet 71, and enters the external circulation air inlet pipe from the external circulation air inlet 21. After being adsorbed and deodorized by the filter module 4, it is discharged from the external circulation air outlet pipe to the external circulation air outlet 22, and then enters the grinding cylinder 1 through the air inlet duct 50. In the above process, part of the odor in the grinding cylinder 1 is dissolved in the condensed water, and the other part of the odor is adsorbed and eliminated by the filter module 4, further improving the deodorization function of the circulating gas.

[0064] Continue to refer to Figure 3 and Figure 5, the driving mechanism 200 includes a driving member and an abutment member 210. The abutment member 210 is arranged on the side of the driving member. The sensing mechanism 300 includes an outer circulation sensing component 310 and an inner circulation sensing component 320 which are arranged at intervals on the peripheral side of the driving member. In the outer circulation mode, the outer circulation sensing component 310 triggers the operation; in the inner circulation mode, the inner circulation sensing component 320 triggers the operation. The abutment member 210 is located between the outer circulation sensing component 310 and the inner circulation sensing component 320, and can abut against the inner circulation sensing component 320 or the outer circulation sensing component 310 with the rotation of the driving member to trigger the inner circulation sensing component 320 to work, or trigger the outer circulation sensing component 310 to work.

[0065] Specifically, the outer circulation sensing component 310 includes an outer circulation sensor 311 and a first elastic piece 312. The first elastic piece 312 is movably disposed on the outer circulation sensor 311, and the first elastic piece 312 can press the switch of the outer circulation sensor 311 under the abutment of the abutment member 210. The inner circulation sensing component 320 includes an inner circulation sensor 321 and a second elastic piece 322. The second elastic piece 322 is movably disposed on the inner circulation sensor 321, and the second elastic piece 322 can press the switch of the inner circulation sensor 321 under the abutment of the abutment member 210.

[0066] Preferably, a support frame 31 is provided on the side of the air duct top plate 30 away from the air duct. The support frame 31 is an arc-shaped plate structure, which is circumferentially arranged above the rotating shaft of the switching mechanism 100, and the driving mechanism 200 can be supported on the support frame 31. Through the above arrangement, the stability and reliability of the rotation of the driving mechanism 200 can be ensured.

[0067] Continue to refer to Figure 3 The driving mechanism 200 further includes a housing 220. The housing 220 is fixedly arranged relative to the outer circulation sensing component 310 and the inner circulation sensing component 320, and is covered above the driving member, and the driving member can rotate relative to the housing 220. The housing 220 can protect the driving member and increase its service life.

[0068] Specifically, connecting ear plates 221 are respectively provided on opposite sides of the housing 220. Two connecting posts 32 are provided on the side of the air duct top plate 30 away from the air duct. The connecting posts 32 correspond to the connecting ear plates 221 one by one and are reliably connected by bolts or the like to ensure that the housing 220 is fixed on the air duct top plate 30.

[0069] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A switching device, characterized in that Integrated in an air duct, the air duct being connected to a grinding cylinder (1) of a food waste processing device, the food waste processing device comprising an external circulation module (2) and an internal circulation module selectively connected to the air duct, the switching device being arranged between the external circulation module (2), the internal circulation module and the air duct; The switching device comprises: a switching mechanism (100) rotatably disposed in a switching space (10) between the external circulation module (2), the internal circulation module and the air duct, wherein the external circulation module (2) and the internal circulation module are selectively connected to the air duct through the rotation of the switching mechanism (100); A driving mechanism (200) is coaxially arranged on the switching mechanism (100), and the switching mechanism (100) can rotate under the drive of the driving mechanism (200); A sensing mechanism (300), wherein the driving mechanism (200) can trigger the sensing mechanism (300), and the sensing mechanism (300) can sense the connection relationship between the external circulation module (2) and the internal circulation module and the air duct.

2. The switching device according to claim 1, characterized in that: The driving mechanism (200) comprises a driving member and an abutment member (210), wherein the abutment member (210) is arranged on a side of the driving member; The sensing mechanism (300) comprises an outer circulation sensing component (310) and an inner circulation sensing component (320) which are arranged at intervals along the circumferential direction on the circumferential side of the driving member; the outer circulation module (2) is connected to the air duct, and the outer circulation sensing component (310) is triggered to work; the inner circulation sensing component (320) is connected to the air duct, and the inner circulation sensing component (320) is triggered to work; The abutment member (210) is located between the outer circulation sensing component (310) and the inner circulation sensing component (320), and can abut against the inner circulation sensing component (320) or the outer circulation sensing component (310) as the driving member rotates, so as to trigger the inner circulation sensing component (320) to work, or trigger the outer circulation sensing component (310) to work.

3. The switching device according to claim 2, characterized in that: The external circulation sensing component (310) comprises an external circulation sensor (311) and a first elastic sheet (312), wherein the first elastic sheet (312) is movably arranged on the external circulation sensor (311), and the first elastic sheet (312) can press the switch of the external circulation sensor (311) under the abutment of the abutment member (210); The internal circulation sensing component (320) comprises an internal circulation sensor (321) and a second elastic sheet (322), wherein the second elastic sheet (322) is movably arranged on the internal circulation sensor (321), and the second elastic sheet (322) can press the switch of the internal circulation sensor (321) under the abutment action of the abutment member (210).

4. The switching device according to claim 2, characterized in that: The driving mechanism (200) further comprises a housing (220), wherein the housing (220) is fixedly arranged relative to the outer circulation sensing component (310) and the inner circulation sensing component (320), and is covered above the driving member, and the driving member is capable of rotating relative to the housing (220).

5. The switching device according to any one of claims 1 to 4, characterized in that: The switching mechanism (100) comprises a baffle structure (110) and a rotating drum (120); the baffle structure (110) is fixedly connected to the side of the rotating drum (120); the rotating drum (120) is coaxially connected to the driving mechanism (200) and can rotate under the drive of the driving mechanism (200); the baffle structure (110) rotates with the rotating drum (120) and can block the external circulation module (2) and the air duct and connect the internal circulation module and the air duct; or, connect the external circulation module (2) and the air duct and block the internal circulation module and the air duct.

6. Gas circulation module, characterized in that: It comprises an air duct bottom plate (20) and an air duct top plate (30) which are interlocked to form an air duct, and also comprises a switching device as described in any one of claims 1 to 5; the switching mechanism (100) is arranged between the air duct bottom plate (20) and the air duct top plate (30), the driving mechanism (200) and the sensing mechanism (300) are respectively arranged on a side of the air duct top plate (30) away from the air duct, and the driving mechanism (200) and the switching mechanism (100) are coaxially connected through the air duct top plate (30).

7. The gas circulation module according to claim 6, characterized in that: The air duct comprises an exhaust duct (40) and an air inlet duct (50); the exhaust duct (40) and the air inlet duct (50) are respectively connected to the grinding cylinder (1); the external circulation module (2) and the internal circulation module are arranged between the exhaust duct (40) and the air inlet duct (50); and the switching space (10) is arranged at the entrance of the air inlet duct (50).

8. The gas circulation module according to claim 6 or 7, characterized in that: A support frame (31) is provided on the side of the air duct top plate (30) facing away from the air duct, the support frame (31) is circumferentially arranged above the rotating shaft of the switching mechanism (100), and the driving mechanism (200) is arranged on the support frame (31).

9. A food waste treatment device, characterized in that: It comprises the grinding cylinder (1), the external circulation module (2), the internal circulation module, a heating device (5), a condensing device (3) and the gas circulation module according to any one of claims 6 to 8; The grinding cylinder (1) is capable of crushing solid materials in kitchen waste; The heating device (5) is arranged outside the grinding cylinder (1) and is capable of heating the food waste so that the liquid material in the food waste turns into steam; The condensing device (3) is arranged at the rear end of the air duct, connected to the grinding cylinder (1) through the external circulation module (2) or the internal circulation module, and is configured to condense the steam to form condensed water; The air duct is selectively connected to the external circulation module (2) and the internal circulation module.

10. The food waste processing equipment according to claim 9, characterized in that: The food waste processing equipment further comprises a filtering module (4), wherein the filtering module (4) is integrated in the external circulation module (2), and the filtering module (4) is configured to adsorb and deodorize the circulating gas of the grinding cylinder (1).

Images