Flow conduit structure, kitchen appliance and control method of flow conduit structure

Abstract

The application relates to the field of kitchen equipment, in particular to a flow pipeline structure, a kitchen appliance and a control method of the flow pipeline structure. The flow pipeline structure is arranged in a box body of the kitchen appliance, the box body is provided with a drying cavity, the flow pipeline structure comprises a circulating pipeline, an exhaust pipeline and a pipeline switching mechanism; the circulating pipeline is used for generating backflow in the drying cavity, the circulating pipeline is in on-off communication with the drying cavity; the exhaust pipeline is used for exhausting gas in the drying cavity to an external space, and the exhaust pipeline is in on-off communication with the external space; the pipeline switching mechanism is connected with the circulating pipeline and the exhaust pipeline, so that the circulating pipeline or the exhaust pipeline is conducted. The flow pipeline structure provided by the application can perform internal circulation of air flow to ensure the uniformity of the temperature in the cavity, can perform external circulation of air flow after drying is completed, can effectively remove the moisture in the cavity, and can avoid forming water stains on the bowl rack or the bottom plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of kitchen equipment, in particular to a flow pipeline structure, a kitchen appliance and a control method of the flow pipeline structure. BACKGROUND

[0002] In order to improve the drying effect of tableware, a fan structure is generally arranged in the disinfection cabinet. The disinfection cabinets with fans on the market are generally divided into internal circulation structures and external circulation structures. Although the internal circulation fan ensures the uniformity of the temperature in the cavity, it cannot effectively remove the moisture in the cavity after drying is completed, resulting in water stains on the bowl rack or the bottom plate. The external circulation fan cannot isolate the external bacteria and dust from entering the disinfection cabinet to pollute the tableware. That is, the disinfection cabinet cannot simultaneously improve the moisture removal effect and the drying effect. SUMMARY

[0003] The purpose of the present application is to provide a flow pipeline structure, a kitchen appliance and a control method of the flow pipeline structure, which can perform internal circulation of airflow to ensure the uniformity of the temperature in the cavity, and can perform external circulation of airflow after drying is completed, thereby effectively removing the moisture in the cavity.

[0004] The present application provides a flow pipeline structure for use in a cabinet of a kitchen appliance, wherein the cabinet is provided with a drying cavity, and the flow pipeline structure comprises a circulation pipeline, an exhaust pipeline and a pipeline switching mechanism.

[0005] The circulation pipeline is used to generate backflow in the drying cavity, and the circulation pipeline is in on-off communication with the drying cavity.

[0006] The exhaust pipeline is used to exhaust the gas in the drying cavity to the external space, and the exhaust pipeline is in on-off communication with the external space.

[0007] The pipeline switching mechanism is connected with the circulation pipeline and the exhaust pipeline to make the circulation pipeline or the exhaust pipeline conductive.

[0008] In the above technical solution, further, a fan is included.

[0009] The pipeline switching mechanism comprises a box body and a switch assembly, and the box body is provided with a containing cavity, and the fan is located in the containing cavity.

[0010] The box body is provided with an air inlet, an air outlet and an exhaust port, the air inlet is opposite to the air inlet side of the fan, and the air outlet and the exhaust port are opposite to the air outlet side of the fan.

[0011] The air inlet, the air outlet and the circulating pipeline are in communication with the drying cavity, the air outlet is in communication with the outside space through the air exhaust pipeline, and the switch assembly is used for opening the air outlet or the air exhaust outlet.

[0012] In the above technical solution, further, the box body is provided with two drying cavities, which are a first cavity and a second cavity.

[0013] The box body is provided with two air inlets, two air outlets and two air exhaust outlets; the two air inlets are a first air inlet and a second air inlet; the two air outlets are a first air outlet and a second air outlet; and the two air exhaust outlets are a first air exhaust outlet and a second air exhaust outlet.

[0014] The first air inlet, the first air outlet and the first air exhaust outlet are correspondingly arranged in the first cavity; and the second air inlet, the second air outlet and the second air exhaust outlet are correspondingly arranged in the second cavity.

[0015] The switch assembly is used for opening at least one of the air outlets or at least one of the air exhaust outlets.

[0016] In the above technical solution, further, the box body includes a box body and a cover body.

[0017] The box body is a circular groove structure, and the cover body is arranged at the groove opening of the box body to form the accommodating cavity.

[0018] The first air outlet, the second air outlet, the first air exhaust outlet and the second air exhaust outlet are arranged on the groove wall of the box body.

[0019] The switch assembly includes a driving device and an annular baffle, the annular baffle is provided with a first communication hole and two second communication holes; the driving device is used for driving the annular baffle to rotate relative to the box body, so that the first communication hole is in communication with one of the first air outlet, the second air outlet, the first air exhaust outlet and the second air exhaust outlet; or the two second communication holes are respectively opened to the first air outlet and the second air outlet or the first air exhaust outlet and the second air exhaust outlet.

[0020] In the above technical solution, further, the first air outlet, the second air outlet, the first air exhaust outlet and the second air exhaust outlet are uniformly distributed on the circumferential groove wall of the box body.

[0021] In the above technical solution, further, the pipeline switching mechanism further includes a first shielding piece and a second shielding piece.

[0022] The first air inlet is located on a side of the box body close to the first chamber, and the first air inlet is offset from the rotating shaft of the fan; the first shielding member is used to open or close the first air inlet;

[0023] The second air inlet is located on a side of the box body close to the second chamber, and the second air inlet is offset from the rotating shaft of the fan; the second shielding member is used to open or close the second air inlet.

[0024] In the above technical solution, further, the pipeline switching mechanism further comprises a first air guide pipe, a second air guide pipe, a first air exhaust pipe and a second air exhaust pipe;

[0025] The first air guide pipe is used to connect the first air outlet and the first chamber; the second air guide pipe is used to connect the second air outlet and the second chamber;

[0026] The first air exhaust pipe penetrates the box body and is used to connect the first air exhaust port and the space outside the box body; the second air exhaust pipe penetrates the box body and is used to connect the second air exhaust port and the space outside the box body.

[0027] In the above technical solution, further, the first air exhaust pipe is provided with a first switch plate at an end far away from the first air exhaust port, and the second air exhaust pipe is provided with a second switch plate at an end far away from the second air exhaust port.

[0028] In the above technical solution, further, a partition plate is arranged in the box body, and the partition plate divides the inside of the box body into the first chamber and the second chamber;

[0029] The partition plate is provided with a sandwich layer, and the fan and the pipeline switching mechanism are installed on the sandwich layer.

[0030] The application also provides a kitchen appliance comprising the flow pipeline structure.

[0031] The application also provides a control method of the flow pipeline structure, which is applied to the flow pipeline structure, and the method comprises the following steps:

[0032] Obtaining a drying mode signal;

[0033] According to the drying mode signal, the first air inlet and / or the second air inlet, and the first air outlet and / or the second air outlet are opened correspondingly to dry the first chamber and / or the second chamber;

[0034] After the drying is completed, it is detected whether the humidity of the first chamber and / or the second chamber is greater than a preset value;

[0035] If yes, the first air exhaust port and / or the second air exhaust port are opened correspondingly.

[0036] Compared with the prior art, the application has the following beneficial effects:

[0037] The circulation pipeline structure provided by the application can perform internal circulation of air flow to ensure uniformity of the temperature in the cavity, and can perform external circulation of air flow after drying to effectively remove moisture in the cavity and avoid water stains on the bowl rack or the bottom plate.

[0038] The application also provides a kitchen appliance comprising the circulation pipeline structure described in the above scheme. Based on the above analysis, the kitchen appliance also has the beneficial effects described above, which will not be repeated here.

[0039] The application also provides a control method of the circulation pipeline structure, which is applied to the circulation pipeline structure described in the above scheme. Based on the above analysis, the kitchen appliance also has the beneficial effects described above, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the drawings needed in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0041] Figure 1 The structural schematic diagram of the kitchen appliance provided by the application is shown in the figure;

[0042] Figure 2 The split structural schematic diagram of the circulation pipeline structure provided by the application is shown in the figure;

[0043] Figure 3 The structural schematic diagram of the box body provided by the application is shown in the figure;

[0044] Figure 4 The structural schematic diagram of the annular baffle provided by the application is shown in the figure.

[0045] In the figure: 101-fan; 102-box body; 103- containing cavity; 104- partition; 105- top plate; 106- bottom plate; 107- interlayer; 108- first cavity; 109- second cavity; 110- first air inlet; 111- second air inlet; 112- first air outlet; 113- second air outlet; 114- first air outlet; 115- second air outlet; 116- box body; 117- cover; 118- annular baffle; 119- first communication hole; 120- second communication hole; 121- waist-shaped baffle; 122- first air duct; 123- second air duct; 124- first air exhaust pipe; 125- second air exhaust pipe. DETAILED DESCRIPTION

[0046] The technical solutions of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0047] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] Embodiment one

[0050] The flow pipeline structure provided by the present application can be applied to kitchen appliances such as disinfection cabinets and dishwashers. The box body is provided with a drying cavity, which can realize cleaning and drying of tableware, and can also exhaust moisture from the box body to realize internal and external circulation of air flow, thereby achieving the purpose of considering the effects of moisture removal and drying.

[0051] Referring to Figures 1 to 4 The flow pipeline structure provided by the present application includes a fan 101 and a pipeline switching mechanism. The pipeline switching mechanism includes a box body 102 and a switch assembly. The box body 102 is provided with a containing cavity 103, and the fan 101 is installed in the containing cavity 103, which can accelerate the flow speed of the air flow, thereby realizing the purposes of rapid drying and rapid moisture removal of tableware. The box body 102 is provided with an air inlet, an air outlet and an exhaust port. The air inlet is opposite to the air inlet side of the fan 101, and the air inlet is in communication with the drying cavity. The fan 101 in the box body 102 generates negative pressure to enable the air flow to enter the box body 102 from the air inlet.

[0052] The air outlet and the exhaust port are opposite to the air outlet side of the fan 101, and the switch assembly is used to open the air outlet or the exhaust port to communicate the air outlet with the containing chamber 103 or communicate the exhaust port with the containing chamber 103. That is, the air flow entering the box body 102 flows out of the box body 102 from one of the air outlet or the exhaust port, when the air flow flows out of the box body 102 from the air outlet, the air flow flowing out of the box body 102 can return to the drying cavity to realize the internal circulation of the air in the drying cavity to realize the drying effect on the tableware. When the air flow flows out of the box body 102 from the exhaust port, the air flow flowing out of the box body 102 can be discharged to the outside of the cabinet to realize the exhaust of the moisture in the cabinet to realize the external circulation of the air flow.

[0053] The circulation pipeline structure provided by the application can realize the internal circulation of the air flow to ensure the uniformity of the temperature in the cavity, and can realize the external circulation of the air flow after the drying is completed, thereby effectively removing the moisture in the cavity and avoiding the formation of water stains on the bowl rack.

[0054] In the optional scheme of the embodiment, the cabinet is provided with a partition plate 104, the partition plate 104 can divide the inside of the cabinet into two drying cavities, and the two drying cavities are a first cavity 108 and a second cavity 109 distributed in an upper and lower manner. The partition plate 104 includes a top plate 105 and a bottom plate 106, and a sandwich layer 107 is arranged between the top plate 105 and the bottom plate 106, and the fan 101 and the pipeline switching mechanism are installed on the sandwich layer 107 to realize the function of the independent air flow circulation of the first cavity 108 and the second cavity 109. Specifically, the top surface of the box body 102 is arranged in close contact with the top plate 105, and the bottom surface of the box body 102 is arranged in close contact with the bottom plate 106.

[0055] Specifically, the box body 102 of the pipeline switching mechanism is provided with two air inlets, two air outlets and two exhaust ports. Specifically, the two air inlets are a first air inlet 110 and a second air inlet 111, the two air outlets are a first air outlet 112 and a second air outlet 113, and the two exhaust ports are a first exhaust port 114 and a second exhaust port 115. The first air inlet 110, the first air outlet 112 and the first exhaust port 114 are arranged correspondingly to the first cavity 108, the second air inlet 111, the second air outlet 113 and the second exhaust port 115 are arranged correspondingly to the second cavity 109, and the switch assembly is used to open at least one air outlet or at least one exhaust port.

[0056] In this embodiment, for the drying step: specifically, when the switch assembly opens the first air outlet 112, the airflow of the first chamber 108 passes through the first air inlet 110, the fan 101 and the first air outlet 112 in sequence, at which time the first chamber 108 performs the drying operation. Similarly, when the switch assembly opens the second air outlet 113, at which time the second chamber 109 performs the drying operation. When the switch assembly opens the first air outlet 112 and the second air outlet 113 at the same time, at which time the first chamber 108 and the second chamber 109 both perform the drying operation.

[0057] For the dehumidifying step: specifically, when the switch assembly opens the first air outlet 114, the airflow of the first chamber 108 passes through the first air inlet 110, the fan 101 and the first air outlet 114 in sequence, at which time the first chamber 108 performs the dehumidifying operation. Similarly, when the switch assembly opens the second air outlet 115, at which time the second chamber 109 performs the dehumidifying operation. When the switch assembly opens the first air outlet 114 and the second air outlet 115 at the same time, at which time the first chamber 108 and the second chamber 109 both perform the dehumidifying operation.

[0058] In the optional scheme of this embodiment, the box body 102 includes a box body 116 and a cover 117. The box body 116 is a circular groove structure, and the cover 117 is arranged on the groove opening of the box body 116 to form the accommodating chamber 103. The first air outlet 112, the second air outlet 113, the first air outlet 114 and the second air outlet 115 are arranged on the groove wall of the box body 116.

[0059] Specifically, the switch assembly includes a driving device and an annular baffle 118, and the annular baffle 118 is provided with a first communication hole 119 and two second communication holes 120. The driving device is used to drive the annular baffle 118 to rotate relative to the box body 116, so that the first communication hole 119 communicates with one of the first air outlet 112, the second air outlet 113, the first air outlet 114 and the second air outlet 115, that is, single-chamber drying or single-chamber dehumidifying can be realized. Or the two second communication holes 120 respectively communicate with the first air outlet 112 and the second air outlet 113 or the first air outlet 114 and the second air outlet 115, that is, double-chamber drying or double-chamber dehumidifying can be realized.

[0060] Further, the first air outlet 112, the second air outlet 113, the first air exhaust 114 and the second air exhaust 115 are through holes uniformly distributed on the circumferential groove wall of the box body 116, and any two adjacent through holes among the four through holes are arranged at an angle of 90° on the groove wall. Correspondingly, the two second communication holes 120 are distributed at an angle of 90° on the annular baffle 118, and the angle between the first communication hole 119 and any second communication hole 120 is 135°. When the first communication hole 119 is in communication with any through hole on the circumferential groove wall of the box body 116, the second communication hole 120 is staggered with the remaining through holes, so as to realize the closing of the remaining through holes; similarly, when the two second communication holes 120 are in communication with the two air outlets or the two air exhausts, the first communication hole 119 is staggered with the remaining through holes, so as to realize the closing of the remaining through holes.

[0061] In the optional scheme of the embodiment, the pipeline switching mechanism further includes a first shielding piece and a second shielding piece. The first air inlet 110 is located on one side of the box body 102 close to the first chamber 108, and the first air inlet 110 deviates from the rotation axis of the fan 101. When the fan 101 rotates, a negative pressure state can be presented at the first air inlet 110. The first shielding piece is used to open or close the first air inlet 110. Specifically, the first shielding piece is a waist-shaped baffle 121, which can be tightly attached to the box body 102 and driven to rotate around the axis to realize the communication and closing of the first air inlet 110. When the first chamber 108 does not perform any operation, the first air inlet 110 is closed.

[0062] The second air inlet 111 is located on one side of the box body 102 close to the second chamber 109, and the second air inlet 111 deviates from the rotation axis of the fan 101. When the fan 101 rotates, a negative pressure state can be presented at the second air inlet 111. The second shielding piece is used to open or close the second air inlet 111. Specifically, the second shielding piece is a waist-shaped baffle 121, which can be tightly attached to the box body 102 and driven to rotate around the axis to realize the communication and closing of the second air inlet 111. When the second chamber 109 does not perform any operation, the second air inlet 111 is closed.

[0063] Embodiment Two

[0064] The flow channel structure in the embodiment two is an improvement on the basis of the above-mentioned embodiment. The technical content disclosed in the above-mentioned embodiment is not repeated, and the content disclosed in the above-mentioned embodiment also belongs to the content disclosed in the embodiment two.

[0065] Referring to Figure 4 In the optional scheme of the embodiment, the pipeline switching mechanism further includes a first air guide pipe 122, a second air guide pipe 123, a first air exhaust pipe 124 and a second air exhaust pipe 125.

[0066] The first air guide pipe 122 is used to connect the first air outlet 112 and the first chamber 108. The first air guide pipe 122 is arranged to guide the air flow from the first air outlet 112 to the side away from the fan 101, so that the air flow in the first chamber 108 circulates in a larger range, which helps to improve the drying effect on the tableware. Similarly, the second air guide pipe 123 is used to connect the second air outlet 113 and the second chamber 109, and the principle is similar to that of the first air guide pipe 122.

[0067] The first air exhaust pipe 124 penetrates the box body and is used to connect the first air exhaust port 114 and the space outside the box body, so as to exhaust the air flow in the first chamber 108 outside the box body. The second air exhaust pipe 125 penetrates the box body and is used to connect the second air exhaust port 115 and the space outside the box body, so as to exhaust the air flow in the second chamber 109 outside the box body.

[0068] In the optional scheme of the embodiment, the first air exhaust pipe 124 is provided with a first switch plate at the end away from the first air exhaust port 114. When the first chamber 108 is in a non-exhaust state, the first switch plate is in a closed state. The second air exhaust pipe 125 is provided with a second switch plate at the end away from the second air exhaust port 115. When the second chamber 109 is in a non-exhaust state, the second switch plate is in a closed state.

[0069] Embodiment three

[0070] The embodiment three of the application provides a kitchen appliance, which comprises the flow pipeline structure of any one of the above-mentioned embodiments, so that the kitchen appliance has all the beneficial technical effects of the flow pipeline structure of any one of the above-mentioned embodiments, which will not be described herein again.

[0071] Embodiment four

[0072] The embodiment four of the application provides a control method of a flow pipeline structure, which is applied to the flow pipeline structure of any one of the above-mentioned embodiments. The method comprises the following steps:

[0073] Obtaining a drying mode signal;

[0074] According to the drying mode signal, the first air inlet 110 and / or the second air inlet 111 and the first air outlet 112 and / or the second air outlet 113 are opened correspondingly to dry the first chamber 108 and / or the second chamber 109;

[0075] After the drying is completed, it is detected whether the humidity of the first chamber 108 and / or the second chamber 109 is greater than a preset value;

[0076] If yes, the first air exhaust port 114 and / or the second air exhaust port 115 are opened correspondingly.

[0077] In this embodiment, specifically, when the sterilization cabinet starts the drying function, the software logic determines which of the upper cavity drying, lower cavity drying and double cavity drying is this time. After determining the mode, according to the corresponding mode, the waist-shaped baffle 121 is rotated to adjust the opening and closing state of the first and second air inlets 110 and 111.

[0078] Then the driving device is started to rotate the annular baffle 118 to the position where the box body 116 of the fan 101 corresponds to the through hole, and then the fan 101 starts to start, at this time the upper and lower first exhaust ports 114 and the second exhaust port 115 on the front of the sterilization cabinet are in the closed state. The hot air flow in the sterilization cabinet cavity starts to circulate in the cavity under the action of the convection wind, so that the four around the cavity is in an approximately same temperature environment, improving the drying effect in the cavity.

[0079] After the drying is finished, the heating device for heating the drying air flow stops working, and the humidity sensor in the box starts to work to determine whether the humidity value in the cavity exceeds the preset drying standard. If the humidity exceeds the standard, the software logic calculates the time required for the current dehumidification according to the preset formula. After the time is confirmed, the annular baffle 118 is started.

[0080] If it is single-cavity dehumidification, the first communication hole 119 is rotated to the first exhaust port 114 or the second exhaust port 115, so that the first exhaust pipe 124 or the first exhaust pipe 124 is connected, and the remaining three pipes are in a closed state, and the software logic controls the corresponding first switch plate or second switch plate on the front of the sterilization cabinet to be opened.

[0081] If the humidity sensor measures that the humidity exceeds the preset maximum humidity, the two second communication holes 120 can be rotated to the first exhaust port 114 and the second exhaust port 115 to make the corresponding double pipes connected, and the first switch plate and the second switch plate are opened at the same time, and the double-channel rapid dehumidification is carried out.

[0082] If it is double-cavity dehumidification, the annular baffle 118 is rotated to make the two second communication holes 120 connected with the first exhaust pipe 124 and the second exhaust pipe 125 on the left side of the sterilization cabinet, and the first air guide pipe 122 and the second air guide pipe 123 on the right side of the sterilization cabinet are in a closed state, and the first switch plate and the second switch plate on the front of the sterilization cabinet are opened at the same time, and the cavity humidity is discharged outward through the first exhaust pipe 124 and the second exhaust pipe 125 (the box body 102 inside is similar to a negative pressure environment in the dehumidification mode, and the dehumidification work is carried out through the air inlet, the fan 101 and the exhaust pipe).

[0083] When the user starts the intelligent dehumidification mode, the cycle detection number is inputted, and the long-term cycle is defaulted. The cycle detection period is inputted, and the machine is self-checked once every 24 hours by default. When a cycle period point is reached, it is judged whether the time since the last drying is greater than 24 hours. If not, the sterilizer does not perform self-checking, and enters the next cycle period. If greater than 24 hours, the humidity sensor is started, and it is judged whether the humidity in the upper and lower cavities is over-standard. If one of the upper and lower cavities is over-standard and the other is up to standard, the annular baffle 118 is started, the first communication hole 119 is rotated to be in communication with the first exhaust pipe 124 or the second exhaust pipe 125, and the time required for dehumidification is calculated according to the humidity value. If the humidity is too large, the two second communication holes 120 can be rotated to be in communication with the first exhaust pipe 124 and the second exhaust pipe 125 at the same time, a single-cavity double-dehumidification channel is formed, and then the first switch plate and the second switch plate on the front of the sterilizer are opened, so that the moisture is discharged outward.

[0084] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. In addition, those skilled in the art can understand that although some embodiments include certain features rather than others included in other embodiments, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments.

Claims

1. A flow channel structure for use inside the cabinet of a kitchen appliance, said cabinet being provided with a drying chamber, characterized in that, The circulation pipeline structure includes a circulation pipeline, an exhaust pipeline, and a pipeline switching mechanism; The circulation pipeline is used to generate reflux in the drying chamber, and the circulation pipeline can be connected to and disconnected from the drying chamber; The exhaust pipe is used to discharge the gas in the drying chamber to the outside space, and the exhaust pipe can be connected to the outside space. The pipeline switching mechanism is connected to the circulation pipeline and the exhaust pipeline to enable the circulation pipeline or the exhaust pipeline to be connected. It also includes the fan (101); The pipeline switching mechanism includes a housing (102) and a switch assembly; the housing (102) is provided with a receiving chamber (103), and the fan (101) is located in the receiving chamber (103); The chamber is provided with two drying chambers, namely a first chamber (108) and a second chamber (109). The box body (102) has two air inlets, two air outlets and two exhaust outlets; the two air inlets are the first air inlet (110) and the second air inlet (111); the two air outlets are the first air outlet (112) and the second air outlet (113); the two exhaust outlets are the first exhaust outlet (114) and the second exhaust outlet (115). The first air inlet (110), the first air outlet (112), and the first exhaust outlet (114) are respectively arranged in relation to the first chamber (108); the second air inlet (111), the second air outlet (113), and the second exhaust outlet (115) are respectively arranged in relation to the second chamber (109); The switching assembly is used to open at least one of the air outlets or at least one of the exhaust ports; The box body (102) includes a box body (116) and a lid (117). The box body (116) has a circular groove structure, and the cover (117) is placed on the groove of the box body (116) to form the receiving chamber (103). The first air outlet (112), the second air outlet (113), the first exhaust outlet (114) and the second exhaust outlet (115) are opened in the groove wall of the box body (116); The switch assembly includes a drive device and an annular baffle (118). The annular baffle (118) has a first connecting hole (119) and two second connecting holes (120). The drive device is used to drive the annular baffle (118) to rotate relative to the housing (116), so that the first connecting hole (119) connects to one of the first air outlet (112), the second air outlet (113), the first exhaust port (114), and the second exhaust port (115); or so that the two second connecting holes (120) connect to the first air outlet (112) and the second air outlet (113) or the first exhaust port (114) and the second exhaust port (115), respectively. The pipeline switching mechanism also includes a first shielding component and a second shielding component; The first air inlet (110) is located on the side of the housing (102) near the first chamber (108), and the first air inlet (110) is offset from the rotation axis of the fan (101); the first shield is used to open or close the first air inlet (110). The second air inlet (111) is located on the side of the housing (102) near the second chamber (109), and the second air inlet (111) is offset from the rotation axis of the fan (101); the second shield is used to open or close the second air inlet (111).

2. The flow channel structure according to claim 1, characterized in that, The first air outlet (112), the second air outlet (113), the first exhaust outlet (114) and the second exhaust outlet (115) are all distributed on the circumferential groove wall of the box body (116).

3. The flow channel structure according to claim 1, characterized in that, The pipeline switching mechanism also includes a first air guide pipe (122), a second air guide pipe (123), a first exhaust pipe (124), and a second exhaust pipe (125); The first air guide tube (122) is used to connect the first air outlet (112) and the first chamber (108); the second air guide tube (123) is used to connect the second air outlet (113) and the second chamber (109). The first exhaust pipe (124) penetrates the housing and is used to connect the first exhaust port (114) and the outer space of the housing; the second exhaust pipe (125) penetrates the housing and is used to connect the second exhaust port (115) and the outer space of the housing.

4. The flow channel structure according to claim 3, characterized in that, A first switch plate is provided at the end of the first exhaust pipe (124) away from the first exhaust port (114), and a second switch plate is provided at the end of the second exhaust pipe (125) away from the second exhaust port (115).

5. The flow channel structure according to claim 1, characterized in that, The box is provided with a partition (104), which divides the interior of the box into the first chamber (108) and the second chamber (109). The partition (104) is provided with a sandwich layer (107), and the fan (101) and the pipeline switching mechanism are installed in the sandwich layer (107).

6. A kitchen appliance, characterized in that, Includes the flow channel structure as described in any one of claims 1 to 5.

7. A method for controlling a flow channel structure, applied to the flow channel structure according to any one of claims 1 to 5, characterized in that, The method includes the following steps: Obtain the drying mode signal; According to the drying mode signal, the first air inlet (110) and / or the second air inlet (111), and the first air outlet (112) and / or the second air outlet (113) are opened to dry the first chamber (108) and / or the second chamber (109); After drying, check whether the humidity of the first chamber (108) and / or the second chamber (109) is greater than the preset value; If so, open the first exhaust port (114) and / or the second exhaust port (115) accordingly.

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