Drying units and dishwashers

Abstract

The present invention relates to the field of kitchen electrical appliances, and in particular to a drying device and a dishwasher, wherein the drying device comprises: a main body, formed with an exhaust air duct, the exhaust air duct having an exhaust port, an air inlet and an air outlet that are interconnected, the exhaust port is connected to a washing chamber, and the air inlet and the air outlet are both connected to the outside of the washing chamber; a fan, used to form an airflow flowing to the air outlet in the exhaust air duct; a reversing mechanism, including a sealing member and a reversing assembly, the sealing member is located in the exhaust air duct, and the reversing assembly is used to drive the sealing member to switch between a first placement state, a second placement state and a third placement state, wherein the sealing member blocks the exhaust port in the first placement state, the sealing member neither blocks the exhaust port nor the air inlet in the second placement state, and the sealing member blocks the air inlet in the third placement state. The present invention avoids the problem of heat waste and prevents the risk of condensed water forming at the outlet.

Description

Technical Field

[0001] The invention relates to the field of kitchen electrical appliances, and in particular to a drying device and a dishwasher. Background Art

[0002] As people's living standards continue to improve, people have higher and higher requirements for the drying performance of household dishwashers. Currently, there are many ways to dry dishwashers on the market, mainly including residual temperature method, internal circulation ventilation method, external circulation ventilation method, and automatic door opening method. Among them, the external circulation ventilation method is a method with high efficiency, good effect, and simple implementation, but there is a problem of heat waste and the risk of condensation water forming at the air outlet. Summary of the invention

[0003] The object of the present invention is to provide a drying device and a dishwasher having the same, so as to solve the problem of heat waste and the risk of condensed water forming at the air outlet of the dishwasher using external circulation ventilation in the prior art.

[0004] The present invention is achieved in that:

[0005] The drying device includes:

[0006] The main body is formed with an exhaust air duct, the exhaust air duct has an exhaust port, an air inlet and an air outlet which are interconnected, the exhaust port is connected to the washing chamber, and the air inlet and the air outlet are both connected to the outside of the washing chamber;

[0007] A fan, used for forming an air flow in the exhaust air duct to flow to the air outlet;

[0008] The reversing mechanism includes a sealing member and a reversing assembly, wherein the sealing member is located in the exhaust air duct, and the reversing assembly is used to drive the sealing member to switch between a first placement state, a second placement state, and a third placement state, wherein the sealing member blocks the exhaust port in the first placement state, the sealing member neither blocks the exhaust port nor the air inlet in the second placement state, and the sealing member blocks the air inlet in the third placement state.

[0009] Optionally, the sealing member is rotatably connected to the main body;

[0010] The reversing assembly includes a driver and a reset member. The driver can drive the sealing member to rotate forward so that the sealing member rotates from a first placement state to a second placement state and a third placement state in sequence. The reset member can drive the sealing member to rotate reversely so that the sealing member is reset to the first placement state.

[0011] Optionally, the sealing member is provided with a transfer column rotatably connected to the main body, and the length direction of the transfer column is parallel to the rotation axis of the sealing member;

[0012] The outer peripheral side surface of the adapter column is provided with a first ratchet tooth, a second ratchet tooth and a third ratchet tooth at intervals in the circumferential direction;

[0013] The reversing mechanism also includes a pawl and a connecting member. The pawl has a first position, a second position and a third position in the axial direction of the transfer column. The connecting member is elastic and connects the pawl to the main body. The connecting member can make the pawl elastically abut against the outer peripheral side of the transfer column and reset to the second position. The pawl can be clamped against the second ratchet tooth and the third ratchet tooth in the first position. When the pawl is clamped against any one of the first ratchet tooth, the second ratchet tooth and the third ratchet tooth, the transfer column is restricted from rotating in the reverse direction.

[0014] The circumferential side of the adapter is also convexly provided with a limit strip extending in the circumferential direction and arranged circumferentially opposite to the second position, the end face of the limit strip close to the first ratchet tooth has a first guide slope that can drive the pawl to move from the second position to the first position when the adapter column rotates forward and is opposite to the ratchet, and the end face of the limit strip close to the third ratchet tooth has a second guide slope that can drive the pawl to move from the second position to the third position when the adapter column rotates forward and is opposite to the ratchet.

[0015] Optionally, a limiting groove is provided on the outer peripheral side of the adapter column;

[0016] A first ratchet, a second ratchet, a third ratchet, a pawl and a limit strip, wherein the limit strip is spaced apart from the groove wall of the limit strip, the first ratchet is located in front of the limit strip in the positive rotation direction of the adapter column, and the second ratchet and the third ratchet are located on the same side of the limit strip in the axial direction of the adapter column.

[0017] Optionally, a portion of the groove wall of the limiting groove forms a first ratchet tooth.

[0018] Optionally, the outer circumferential side surface of the adapter column is further provided with a first protrusion, a second protrusion and a third protrusion at intervals in the circumferential direction, wherein the first protrusion is located at a ready-to-push position when the pawl is clamped against the first ratchet tooth, the second protrusion is located at a ready-to-push position when the pawl is clamped against the second ratchet tooth, and the third protrusion is located at a ready-to-push position when the pawl is clamped against the third ratchet tooth;

[0019] The driver includes a pushing member and a driving member that drives the pushing member to reciprocate along a straight line and pushes the pushing member toward a to-be-pushed position. The driving member can push the first protrusion through the pushing member when the first protrusion is in the to-be-pushed position, so that the sealing member rotates positively from the first placement state to the second placement state. The driving member can push the second protrusion through the pushing member when the second protrusion is in the to-be-pushed position, so that the sealing member rotates positively from the second placement state to the third placement state. The driving member can push the third protrusion through the pushing member when the third protrusion is in the to-be-pushed position, so that the sealing member rotates positively from the third placement state to the fourth placement state, wherein the connecting member can drive the pawl to move from the first position to the second position when the sealing member is in the fourth placement state.

[0020] Optionally, at least two first protrusions are provided and are spaced apart in the axial direction of the adapter column;

[0021] And / or, at least two second protrusions are provided and are spaced apart in the axial direction of the adapter column;

[0022] And / or, there are at least two third protrusions, which are spaced apart in the axial direction of the adapter column.

[0023] Optionally, the reversing mechanism also includes a connecting rod and a guide member, the connecting rod is used to connect the push member and the driving member, the extension direction of the connecting rod is parallel to the movement direction of the push member, the guide member has a guide hole for the connecting rod to pass through, and the cross-sectional shape of the guide hole is the same as the cross-sectional shape of the connecting rod.

[0024] Optionally, the reversing mechanism further comprises an anti-shake structure elastically abutting against the side of the connecting rod facing away from the adapter column to prevent the connecting rod from tilting.

[0025] The present invention also provides a dishwasher, comprising the above-mentioned drying device.

[0026] Compared with the prior art, the drying device and dishwasher proposed in the present invention have the following beneficial effects: in the initial stage of steam discharge, the switching component switches the sealing member to the second placement state, so that the amount of steam in the washing chamber entering the exhaust channel can be reduced, and the steam content of the air discharged through the air outlet is less, which can avoid the formation of condensed water at the air outlet. In this case, the steam discharged through the exhaust port is less, which can avoid the heat loss rate in the washing chamber, avoid heat waste, and is beneficial to improving the drying effect. In the later stage of steam discharge, the switching component switches the sealing member to the second placement state. At this time, the steam flowing out through the exhaust port is less, and the steam content of the air discharged through the air outlet is also less, which can avoid the formation of condensed water at the air outlet. At the same time, the steam in the washing chamber can be accelerated to improve the drying efficiency of the washing chamber. Therefore, the present invention can avoid the problem of heat waste and prevent the risk of condensed water forming at the outlet under the premise of utilizing the high efficiency, good effect and simple implementation of external circulation ventilation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 is a schematic diagram of the overall structure of a drying device provided by an embodiment of the present invention, wherein the sealing member is in a first placement state;

[0029] Figure 2 is a schematic diagram of the overall structure of the drying device provided by an embodiment of the present invention, wherein the sealing member is in a second placement state;

[0030] Figure 3 is a schematic diagram of the overall structure of the drying device provided by an embodiment of the present invention, wherein the sealing member is in the third placement state

[0031] Figure 4 is a schematic structural diagram of a reversing mechanism provided by an embodiment of the present invention, wherein the sealing member is in a first placement state;

[0032] Figure 5 yes Figure 4 A cross-sectional view of

[0033] Figure 6 yes Figure 5 A is a schematic diagram of the enlarged structure of the middle part;

[0034] Figure 7 is a schematic structural diagram of a reversing mechanism provided by an embodiment of the present invention, wherein the sealing member is in a second placement state;

[0035] Figure 8 yes Figure 7 A cross-sectional view of

[0036] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure of B;

[0037] Fig.10 is a schematic structural diagram of a reversing mechanism provided by an embodiment of the present invention, wherein the sealing member is in a fourth placement state;

[0038] Fig.11 yes Fig.10 A cross-sectional view of

[0039] Fig.12 yes Fig.11 Schematic diagram of the enlarged structure of C in the middle;

[0040] Fig.13 is a schematic structural diagram of a sealing member and a transfer column provided in an embodiment of the present invention;

[0041] Fig.14 yes Fig.13 Schematic diagram of the enlarged structure of D in the figure.

[0042] Description of Figure Numbers:

[0043] Label name Label name 100 main body 101 Exhaust duct 1011 Exhaust port 1012 Air Inlet 1013 Air outlet 300 Reversing mechanism 310 Sealing parts 320 Reversing components 321 Drive 322 Reset 3211 Push piece 3212 Drive parts 3213 Connecting rod 3214 Guide 323 pawl 324 Connectors 330 Adapter 3301 Limit slot 331 First ratchet 332 Second ratchet 333 Third ratchet 334 Limit bar 3341 First guide ramp 3342 Second guide ramp 335 The first bulge 336 Second bulge 337 The third bulge 338 Anti-shake structure 3381 Structural base 3382 Anti-shake shrapnel 33821 Plug-in section 33822 Pressure section DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0045] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate positions or placement relationships based on the positions or placement relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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.

[0048] An embodiment of the present invention provides a drying device for a dishwasher, which is usually arranged on the side of an inner container of the dishwasher.

[0049] See also Figures 1 to 14 The drying device includes a main body 100, a fan and a reversing mechanism 300.

[0050] The main body 100 is formed with an exhaust duct 101. The main body 100 can be made of a single structure, which is conducive to improving the mechanical strength of the main body 100 and ensuring the sealing of the exhaust duct 101. The main body 100 can also be made of multiple structural parts, which is conducive to reducing the manufacturing difficulty and manufacturing cost of the main body 100. When the main body 100 is made of multiple structural parts, some of the structural parts can be the inner tank of the dishwasher, that is, the local structure of the inner tank of the dishwasher can constitute a part of the main body 100. The exhaust duct 101 has an exhaust port 1011, an air inlet 1012 and an air outlet 1013 that are interconnected. The exhaust duct 101 is a three-way channel as a whole, wherein the exhaust port 1011 is connected to the washing cavity, the washing cavity is formed by the inner tank of the dishwasher, and the air inlet 1012 and the air outlet 1013 are both connected to the outside of the washing cavity.

[0051] The fan is used to form an airflow in the exhaust air duct 101 that flows to the air outlet 1013, that is, the fan needs to be able to make the air flow. The fan can be a centrifugal fan, an axial flow fan, a rotary fan, etc., which can be selected according to the actual structure of the drying device, the implementation requirements, etc. When air flows out of the air outlet 1013, air will flow into the exhaust air duct 101 through at least one of the exhaust port 1011 and the air inlet 1012. Since the exhaust port 1011 is connected to the washing chamber, the air inlet 1012 and the air outlet 1013 are both connected to the outside of the washing chamber. Therefore, the air entering the exhaust channel through the exhaust port 1011 is the air in the washing chamber, and the air entering the exhaust channel through the air inlet 1012 is the air outside the washing chamber.

[0052] The reversing mechanism 300 includes a sealing member 310 and a reversing assembly 320. The sealing member 310 is located in the exhaust air duct 101. The reversing assembly 320 is used to drive the sealing member 310 to switch between a first placement state, a second placement state, and a third placement state. The sealing member 310 blocks the exhaust port 1011 in the first placement state, and the sealing member 310 neither blocks the exhaust port 1011 nor the air inlet 1012 in the second placement state. The sealing member 310 blocks the air inlet 1012 in the third placement state. Specifically, when the fan forms an airflow toward the air outlet 1013 in the exhaust duct 101, if the sealing member 310 blocks the exhaust port 1011 in the first placement state, since the sealing member 310 blocks the exhaust port 1011 but does not block the air inlet 1012, at this time, the air in the washing chamber will not enter the exhaust channel through the exhaust port 1011, and the air outside the washing chamber will enter the exhaust channel through the air inlet 1012. If the sealing member 310 blocks the exhaust port 1011 in the second placement state, since the sealing member 310 neither blocks the exhaust port 1011 nor blocks the air inlet 1012, the air in the washing chamber will enter the exhaust channel through the air inlet 1012. The air inlet 1012 is not blocked by the sealing member 310, and the air in the washing chamber will enter the exhaust passage through the exhaust port 1011, and the air outside the washing chamber will also enter the exhaust passage through the air inlet 1012. If the sealing member 310 blocks the exhaust port 1011 when in the third placement state, since the sealing member 310 does not block the exhaust port 1011, but only blocks the air inlet 1012, the air in the washing chamber will enter the exhaust passage through the exhaust port 1011, and the air outside the washing chamber will not enter the exhaust passage through the air inlet 1012.

[0053] It should be noted that the fan will be opened and closed according to actual needs, and will not be in the open state all the time. Similarly, the operating state of the reversing mechanism 300 will adjust the placement state of the sealing member 310 according to actual needs.

[0054] In the specific use process, when the dishwasher is used normally, there is no need to discharge steam in the washing chamber. At this time, since there is no need to discharge steam in the washing chamber, the reversing component 320 adjusts the sealing member 310 to the first placement state, such as Figure 1 , Figure 4 , Figure 5 , Figure 6As shown, the sealing member 310 is used to block the exhaust port 1011 to prevent the steam in the washing chamber from leaking through the exhaust port 1011. In this case, turning on the fan will not play any role, so the fan does not need to be turned on. When the dishwasher completes the cleaning operation, the steam in the washing chamber needs to be discharged and the washing chamber needs to be dried. At this time, since the steam needs to be discharged from the washing chamber, the exhaust port 1011 needs to be opened to allow the steam to be discharged from the exhaust port 1011. In the initial stage of steam discharge, if the sealing member 310 opens the exhaust port 1011 and blocks the air inlet 1012, a large amount of steam will be discharged directly through the exhaust port 1011, thereby causing the air outlet 1013 to gather a large amount of condensed water, and in this process, the heat in the washing chamber will also be quickly lost with the large amount of steam discharged, affecting the drying effect of the washing chamber. Therefore, in the initial stage of steam discharge, the switching component can be used to switch the sealing member 310 to the second placement state, such as Figure 2 , Figure 7 , Figure 8 , Fig. 9 As shown, at this time, the sealing member 310 neither blocks the exhaust port 1011 nor the air inlet 1012. The air in the washing chamber will enter the exhaust channel through the exhaust port 1011, and the air outside the washing chamber will also enter the exhaust channel through the air inlet 1012. In this way, under the condition of equal air volume, the amount of steam in the washing chamber entering the exhaust channel can be reduced. At the same time, the air entering the exhaust channel through the air inlet 1012 is dry air. After the dry air is mixed with a small amount of steam, the steam content of the air discharged through the air outlet 1013 is relatively small, which can avoid the formation of condensed water at the air outlet 1013. In this case, the steam discharged through the exhaust port 1011 is relatively small, which can avoid the heat loss speed in the washing chamber, avoid heat waste, and help improve the drying effect. In the later stage of steam discharge, the switching component can switch the sealing member 310 to the third placement state. Figure 3 As shown, the sealing member 310 does not block the exhaust port 1011 but only blocks the air inlet 1012. At this time, since part of the steam in the washing chamber has been discharged, the steam flowing out through the exhaust port 1011 is less, and the steam content of the air discharged through the air outlet 1013 is also less, which can avoid the formation of condensation water at the air outlet 1013. At the same time, it can speed up the steam in the washing chamber and improve the drying efficiency of the washing chamber.

[0055] As can be seen from the above, based on the structural design of the present invention, in the initial stage of steam discharge, the switching component switches the sealing member 310 to the second placement state. In this way, the amount of steam in the washing chamber entering the exhaust channel can be reduced, and the steam content of the air discharged through the air outlet 1013 is less, which can avoid the formation of condensation water at the air outlet 1013. In this case, the steam discharged through the exhaust port 1011 is less, which can avoid the heat loss rate in the washing chamber, avoid heat waste, and help improve the drying effect. In the later stage of steam discharge, the switching component switches the sealing member 310 to the second placement state. At this time, the steam flowing out through the exhaust port 1011 is less, and the steam content of the air discharged through the air outlet 1013 is also less, which can avoid the formation of condensation water at the air outlet 1013. At the same time, the steam in the washing chamber can be accelerated to improve the drying efficiency of the washing chamber. Therefore, the present invention can avoid the problem of heat waste and prevent the risk of condensation water forming at the starting point under the premise of utilizing the high efficiency, good effect and simple implementation of external circulation ventilation.

[0056] It should be noted that, in a specific implementation, the distance from the exhaust port 1011 to the air outlet 1013 is close to the distance from the air inlet 1012 to the air outlet 1013, so that the air intake volume when the air inlet 1012 and the exhaust port 1011 are simultaneously intake is roughly the same.

[0057] See also Figures 1 to 13 In one embodiment of the present invention, a drying device is provided, wherein a sealing member 310 is rotatably connected to a main body 100; a reversing assembly 320 includes a driver 321 and a reset member 322, wherein the driver 321 can drive the sealing member 310 to rotate forward so that the sealing member 310 rotates from a first placement state to a second placement state and a third placement state in sequence, and the reset member 322 can drive the sealing member 310 to rotate reversely so that the sealing member 310 is reset to the first placement state. In this way, when the sealing member 310 needs to maintain the first placement state, the elastic restoring force of the reset member 322 can be used to maintain the state of the sealing member 310 without the need for additional electrical energy to maintain it, that is, when the dishwasher is in normal use, the drying device as a whole does not need to consume any electrical energy.

[0058] See also Figures 1 to 14In one embodiment of the present invention, a drying device is provided, wherein the sealing member 310 is provided with a transfer column 330 rotatably connected to the main body 100, and the length direction of the transfer column 330 is parallel to the rotation axis of the sealing member 310; the outer peripheral side surface of the transfer column 330 is provided with a first ratchet 331, a second ratchet 332 and a third ratchet 333 at intervals in the circumferential direction; the reversing mechanism 300 also includes a pawl 323 and a connecting member 324, the pawl 323 has a first position, a second position and a third position in the axial direction of the transfer column 330, the connecting member 324 is elastic and connects the pawl 323 to the main body 100, the connecting member 324 can make the pawl 323 elastically abut against the outer peripheral side surface of the transfer column 330, and reset to the second position, the pawl 323 can be in the first position The pawl 323 can be locked against the second ratchet 332 and the third ratchet 333. When the pawl 323 is locked against any one of the first ratchet 331, the second ratchet 332 and the third ratchet 333, the adapter column 330 is restricted from rotating in the reverse direction. A limiting strip 334 extending in the circumferential direction and arranged opposite to the second position in the circumferential direction is also convexly provided on the peripheral side of the adapter. The end surface of the limiting strip 334 close to the first ratchet 331 has a first guide slope 3341 that can drive the pawl 323 to move from the second position to the first position when the adapter column 330 rotates forward and is opposite to the pawl 323. The end surface of the limiting strip 334 close to the third ratchet 333 has a second guide slope 3342 that can drive the pawl 323 to move from the second position to the third position when the adapter column 330 rotates forward and is opposite to the pawl 323. Due to the action of the limiting strip 334, the pawl 323 is restricted to the first position.

[0059] During use, the drying device has the following usage states:

[0060] First use state: the sealing member 310 is in the first placement state, such as Figure 1 , Figure 4 , Figure 5 , Figure 6 As shown, as an initial state, the reset member 322 has a torque to drive the transfer column 330 to rotate in the opposite direction, and is locked against the first ratchet tooth 331. The pawl 323 limits the transfer column 330 from rotating in the opposite direction through the first ratchet tooth 331. At this time, the pawl 323 is not opposite to the limit bar 334 in the radial direction of the transfer column 330, and the pawl 323 is in the second position under the operation of the elastic restoring force of the connecting member 324.

[0061] Second use state: the driving assembly drives the adapter post 330 to rotate forward until the pawl 323 is engaged with the second ratchet tooth 332, so that the second ratchet tooth 332 restricts the adapter post 330 from rotating in the reverse direction. At this time, the sealing member 310 is in the second placement state, such as Figure 2 , Figure 7 , Figure 8 , Fig. 9As shown, in this process, the pawl 323 moves to the first position under the guidance of the first guide slope 3341, and due to the action of the limiting strip 334, the pawl 323 is always limited to the first position to ensure that the pawl 323 can continuously clamp against the second ratchet tooth 332;

[0062] The third use state: the driving assembly continues to drive the adapter column 330 to continue to rotate forward until the pawl 323 is engaged with the third ratchet tooth 333, so that the third ratchet tooth 333 restricts the adapter column 330 from rotating in the reverse direction. At this time, the sealing member 310 is in the third placement state, such as Figure 3 As shown, in this process, similarly, due to the effect of the limiting strip 334, the pawl 323 is always limited to the first position to ensure that the pawl 323 can continuously engage the third ratchet tooth 333;

[0063] Fourth use state: First, the driving assembly continues to drive the adapter post 330 to continue to rotate forwardly until the pawl 323 is no longer opposite to the limit bar 334 in the radial direction of the adapter post 330, and the limit bar 334 no longer restricts the pawl 323. The pawl 323 is reset to the second position under the action of the elastic restoring force of the connecting member 324. Secondly, the driving assembly cancels the forward drive of the adapter post 330, and the adapter post 330 will rotate in the opposite direction under the action of the reset member 322. The pawl 323 will be guided by the second guide slope 3342. The pawl 323 is moved to the third position. Once again, when the pawl 323 is in the third position, since the pawl 323 will not abut against the second ratchet tooth 332 and the third ratchet tooth 333, the adapter post 330 will directly rotate in the opposite direction until the pawl 323 is no longer opposite to the limiting strip 334 in the radial direction of the adapter post 330. Under the action of the elastic restoring force of the connecting member 324, the pawl 323 moves to the second position, and the pawl 323 abuts against the first ratchet tooth 331, and limits the adapter post 330 from continuing to rotate in the opposite direction. The sealing member 310 is in the first placement state. Figure 1 , Figure 4 , Figure 5 , Figure 6 As shown, reset to the initial position.

[0064] In combination with the above-mentioned use state, in the specific use process, when the dishwasher is used normally, there is no need to discharge steam in the washing chamber. At this time, since there is no need to discharge steam in the washing chamber, the drying device is in the first use state, and the sealing member 310 is in the first placement state, so that the sealing member 310 blocks the exhaust port 1011 to prevent the steam in the washing chamber from leaking through the exhaust port 1011. In this case, turning on the fan will not play any role, so the fan does not need to be turned on. When the dishwasher completes the cleaning operation, it is necessary to discharge the steam in the washing chamber and dry the washing chamber. At this time, since the steam needs to be discharged in the washing chamber, the exhaust port 1011 needs to be opened. 11, so that the steam can be discharged from the exhaust port 1011. In the initial stage of steam discharge, if the sealing member 310 opens the exhaust port 1011 and blocks the air inlet 1012, a large amount of steam will be discharged directly through the exhaust port 1011, thereby causing the air outlet 1013 to gather a large amount of condensed water. In this process, the heat in the washing chamber will also be quickly lost with the large amount of steam discharged, affecting the drying effect of the washing chamber. Therefore, in the initial stage of steam discharge, the drying device is placed in the second use state, and the sealing member 310 is placed in the second placement state. At this time, the sealing member 310 neither blocks the exhaust port 1011 nor the air inlet 1012, and the heat in the washing chamber is not discharged. The air will enter the exhaust passage through the exhaust port 1011, and the air outside the washing chamber will also enter the exhaust passage through the air inlet 1012. In this way, under the condition of the same air volume, the amount of steam in the washing chamber entering the exhaust passage can be reduced. At the same time, the air entering the exhaust passage through the air inlet 1012 is dry air. After the dry air is mixed with a small amount of steam, the steam content of the air discharged through the air outlet 1013 is relatively small, which can avoid the formation of condensed water at the air outlet 1013. In this case, the steam discharged through the exhaust port 1011 is relatively small, which can avoid the heat loss speed in the washing chamber, avoid heat waste, and help improve the drying effect. In the later stage, the drying device is placed in the third usage state, the sealing member 310 is placed in the third placement state, the sealing member 310 does not block the exhaust port 1011 but only blocks the air inlet 1012. At this time, since part of the steam in the washing chamber has been discharged, the steam flowing out through the exhaust port 1011 is less, and the steam content of the air discharged through the air outlet 1013 is also less, which can avoid the formation of condensed water at the air outlet 1013. At the same time, the steam in the washing chamber can be accelerated to improve the drying efficiency of the washing chamber. Finally, when the dishwasher completes the steam discharge, the drying device is placed in the fourth usage state, the sealing member 310 is placed in the first placement state, and the dishwasher can be used normally again.

[0065] Based on this structural design, through the cooperation between the pawl 323 and the first ratchet 331, the second ratchet 332 and the third ratchet 333, the sealing member 310 is in the first placement state, the second placement state and the third placement state, and there is no need for the reversing component 320 to apply torque to the adapter column 330 to maintain it.

[0066] It should be noted that the limiting strip 334 and the connecting column are designed as an integrated structure to improve the mechanical connection strength between the limiting strip 334 and the connecting column, and prevent the pawl 323 from being damaged when it pushes against the limiting strip 334 .

[0067] See also Figures 1 to 14 In one embodiment of the present invention, a drying device is provided, wherein the outer peripheral side of the transfer column 330 is provided with a limiting groove 3301; a first ratchet tooth 331, a second ratchet tooth 332, a third ratchet tooth 333, a pawl 323 and a limiting strip 334, wherein the limiting strip 334 is spaced apart from the groove wall of the limiting groove 3301, the first ratchet tooth 331 is located in front of the limiting strip 334 in the positive rotation direction of the transfer column 330, and the second ratchet tooth 332 and the third ratchet tooth 333 are located on the same side of the limiting strip 334 in the axial direction of the transfer column 330. Based on this, in actual use, the pawl 323 is always in the limiting groove 3301, which is conducive to preventing the pawl 323 from being loosened from the transfer column 330 during the process of the pawl 323 moving relative to the transfer column 330.

[0068] See also Figure 6 , Fig. 9 , Fig.12 , Fig.14 In one embodiment of the present invention, a drying device is provided, wherein a portion of the groove wall of the limiting groove 3301 forms a first ratchet tooth 331. This is beneficial to simplifying the structure of the adapter column 330 and reducing the difficulty and cost of manufacturing.

[0069] See also Figures 4 to 14In one embodiment of the present invention, a drying device is provided, wherein the outer peripheral side surface of the adapter column 330 is also provided with a first protrusion 335, a second protrusion 336 and a third protrusion 337 at intervals in the circumferential direction, wherein the first protrusion 335 is located at a waiting position when the pawl 323 is clamped against the first ratchet tooth 331, the second protrusion 336 is located at a waiting position when the pawl 323 is clamped against the second ratchet tooth 332, and the third protrusion 337 is located at a waiting position when the pawl 323 is clamped against the third ratchet tooth 333; the driver 321 includes a pushing member 3211 and a driving member 3211 for driving the pushing member 3211 to reciprocate along a straight line and push the pushing member 3211 toward the waiting position. 212, the driving member 3212 can push the first protrusion 335 through the pushing member 3211 when the first protrusion 335 is in the waiting position, so that the sealing member 310 is positively rotated from the first placement state to the second placement state, the driving member 3212 can push the second protrusion 336 through the pushing member 3211 when the second protrusion 336 is in the waiting position, so that the sealing member 310 is positively rotated from the second placement state to the third placement state, and the driving member 3212 can push the third protrusion 337 through the pushing member 3211 when the third protrusion 337 is in the waiting position, so that the sealing member 310 is positively rotated from the third placement state to the fourth placement state, as shown in FIG. Fig.10 , Fig.11 , Fig.12 , wherein the connecting member 324 can drive the pawl 323 to move from the first position to the second position when the sealing member 310 is in the fourth placement state.

[0070] When the dishwasher is in normal use, there is no need to discharge steam in the washing cavity. At this time, since there is no need to discharge steam in the washing cavity, the first protrusion 335 is in the waiting position, and the sealing member 310 is in the first placement state, so that the sealing member 310 blocks the exhaust port 1011 to prevent the steam in the washing cavity from leaking through the exhaust port 1011. In this case, turning on the fan will not play any role, so the fan does not need to be turned on. After the dishwasher completes the cleaning operation, the steam in the washing cavity needs to be discharged and the washing cavity needs to be dried. At this time, since the steam needs to be discharged in the washing cavity, the exhaust port 1011 needs to be opened to allow the steam to be discharged from the exhaust port 1011. In the initial stage of steam discharge, if the sealing member 310 is opened, the exhaust port 1011 needs to be opened. Opening the exhaust port 1011 and blocking the air inlet 1012 will cause a large amount of steam to be discharged directly through the exhaust port 1011, thereby causing a large amount of condensed water to gather at the air outlet 1013, and in this process, the heat in the washing chamber will also be quickly lost with the large amount of steam discharged, affecting the drying effect of the washing chamber. Therefore, in the initial stage of steam discharge, the driving member 3212 pushes the first protrusion 335 through the pushing member 3211 to move the second protrusion 336 to the pushing position, and the sealing member 310 rotates forward from the first placement state to the second placement state. At this time, the sealing member 310 neither blocks the exhaust port 1011 nor the air inlet 1012, and the air in the washing chamber will enter the exhaust channel through the exhaust port 1011, and the washing The air outside the washing chamber will also enter the exhaust duct through the air inlet 1012. In this way, under the condition of equal air volume, the amount of steam in the washing chamber entering the exhaust duct can be reduced. At the same time, the air entering the exhaust duct through the air inlet 1012 is dry air. After the dry air is mixed with a small amount of steam, the steam content of the air discharged through the air outlet 1013 is less, which can avoid the formation of condensed water at the air outlet 1013. In this case, the steam discharged through the exhaust port 1011 is less, which can avoid the heat loss speed in the washing chamber and the waste of heat, which is beneficial to improve the drying effect. In the later stage of steam discharge, the drying device is in the third use state, and the driving member 3212 pushes the second The protrusion 336 is pushed to move the third protrusion 337 to the waiting position, and the sealing member 310 is rotated forward from the second placement state to the third placement state. The sealing member 310 does not block the exhaust port 1011 but only blocks the air inlet 1012. At this time, since part of the steam in the washing chamber has been discharged, the steam flowing out through the exhaust port 1011 is less, and the steam content of the air discharged through the air outlet 1013 is also less, which can avoid the formation of condensed water at the air outlet 1013. At the same time, the steam in the washing chamber can be accelerated to improve the drying efficiency of the washing chamber. Finally, when the dishwasher completes the steam discharge, the driving member 3212 pushes the third protrusion 337 to rotate the sealing member 310 from the third placement state to the fourth placement state. Fig.10 , Fig.11 , Fig.12, wherein the connecting member 324 can drive the pawl 323 to move from the first position to the second position when the sealing member 310 is in the fourth placement state, and the dishwasher can be used normally again.

[0071] Based on this structural design, the driving member 3212 only needs to select a linear reciprocating intermittent motion mechanism. The linear reciprocating intermittent motion mechanism has the advantages of simple structure, high reliability, low cost, etc., thereby reducing the production cost of the drying device.

[0072] In this embodiment, the cross-sectional shape of the adapter post 330 is preferably an open ring, the reset member 322 is a torsion spring, and the adapter post 330 is sleeved on the reset member 322 , so that a certain deformation can be sent by the adapter post 330 to achieve this.

[0073] See also Figure 7 , Fig.10 , Fig.13 In one embodiment of the present invention, a drying device is provided, wherein at least two first protrusions 335 are provided and spaced apart in the axial direction of the adapter column 330. In this way, the driving member 3212 pushes against at least two first protrusions 335 at the same time through the pushing member 3211, and each first protrusion 335 can jointly bear the pushing force of the pushing member 3211, which can prevent the first protrusion 335 from being damaged due to excessive force when pushing against a single first protrusion 335.

[0074] Please refer to the figure Figure 7 , Fig.10 , Fig.13 In one embodiment of the present invention, a drying device is provided, wherein at least two second protrusions 336 are provided and spaced apart in the axial direction of the adapter column 330. In this way, the driving member 3212 pushes against at least two second protrusions 336 together through the pushing member 3211, and each second protrusion 336 can jointly bear the pushing force of the pushing member 3211, which can prevent the second protrusion 336 from being damaged due to excessive force when pushing against a single second protrusion 336.

[0075] Please refer to the figure Figure 7 , Fig.10 , Fig.13 In one embodiment of the present invention, a drying device is provided, wherein at least two third protrusions 337 are provided and spaced apart in the axial direction of the adapter column 330. In this way, the driving member 3212 pushes against at least two third protrusions 337 together through the pushing member 3211, and each third protrusion 337 can jointly bear the pushing force of the pushing member 3211, which can prevent the third protrusion 337 from being damaged due to excessive force when pushing against a single third protrusion 337.

[0076] See also Figure 4 , Figure 5 , Figure 7 , Figure 8 , Fig.11 , Fig.12 In one embodiment of the present invention, a drying device is provided, wherein the reversing mechanism 300 further comprises a connecting rod 3213 and a guide member 3214, wherein the connecting rod 3213 is used to connect the push member 3211 and the driving member 3212, wherein the extending direction of the connecting rod 3213 is parallel to the moving direction of the push member 3211, and the guide member 3214 is provided with a guide hole for the connecting rod 3213 to pass through, wherein the cross-sectional shape of the guide hole is the same as that of the connecting rod 3213. Based on this, by limiting the connecting rod 3213 through the guide hole, the push member 3211 can be effectively prevented from shaking during the movement.

[0077] See also Figure 4 , Figure 5 , Figure 7 , Figure 8 , Fig.11 , Fig.12 In one embodiment of the present invention, a drying device is provided, wherein the reversing mechanism 300 further comprises an anti-shake structure 338 elastically abutting against the side of the connecting rod 3213 away from the adapter column 330 to prevent the connecting rod 3213 from tilting. In this way, the pushing member 3211 can be further prevented from shaking during the movement.

[0078] Specifically, in this embodiment, the anti-shake structure 338 includes a structural base 3381 and an anti-shake spring piece 3382. The structural base 3381 is located on the side of the connecting rod 3213 away from the adapter column 330 to open a plug-in slot, and the opening direction of the plug-in slot is staggered with the extension direction of the connecting rod 3213. The anti-shake spring piece 3382 includes a plug-in section 33821 and a pressing section 33822. The plug-in section 33821 is plugged into the plug-in slot and is parallel to the opening direction of the plug-in slot and abuts against the connecting rod 3213. The pressing section 33822 is connected to one end of the plug-in section 33821 away from the structural base 3381 and is parallel to the two connecting rods 3213 and presses against the side of the connecting rod 3213 away from the adapter column 330.

[0079] The present invention also provides a dishwasher, which includes the above-mentioned drying device. The specific structure of the drying device refers to the above-mentioned embodiment. Since the present dishwasher adopts all the technical solutions of all the above-mentioned embodiments, it also has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0080] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drying device, characterized in that: include: The main body is formed with an exhaust air duct, the exhaust air duct has an exhaust port, an air inlet and an air outlet which are interconnected, the exhaust port is connected to the washing chamber, and the air inlet and the air outlet are both connected to the outside of the washing chamber; A fan, used for forming an air flow in the exhaust air duct to flow to the air outlet; The reversing mechanism comprises a sealing member and a reversing assembly, wherein the sealing member is located in the exhaust air duct, and the reversing assembly is used to drive the sealing member to switch between a first placement state, a second placement state, and a third placement state, wherein the sealing member blocks the exhaust port in the first placement state, the sealing member blocks neither the exhaust port nor the air inlet in the second placement state, and the sealing member blocks the air inlet in the third placement state; In the initial stage of steam discharge from the washing chamber, the sealing member is switched to the second placement state, the air in the washing chamber enters the exhaust channel through the exhaust port, and the air outside the washing chamber enters the exhaust channel through the air inlet, and the air is mixed and discharged through the air outlet; In the later stage of steam discharge from the washing chamber, the sealing member is switched to the third placement state, and the air in the washing chamber enters the exhaust passage through the exhaust port and is then discharged through the air outlet.

2. The drying device according to claim 1, characterized in that: The sealing member is rotatably connected to the main body; The reversing assembly includes a driver and a reset member. The driver can drive the sealing member to rotate forward so that the sealing member rotates from a first placement state to a second placement state and a third placement state in sequence. The reset member can drive the sealing member to rotate reversely so that the sealing member is reset to the first placement state.

3. The drying device according to claim 2, characterized in that: The sealing member is provided with a transfer column rotatably connected to the main body, and the length direction of the transfer column is parallel to the rotation axis of the sealing member; The outer peripheral side surface of the adapter column is provided with a first ratchet tooth, a second ratchet tooth and a third ratchet tooth at intervals in the circumferential direction; The reversing mechanism also includes a pawl and a connecting member. The pawl has a first position, a second position and a third position in the axial direction of the transfer column. The connecting member is elastic and connects the pawl to the main body. The connecting member can make the pawl elastically abut against the outer peripheral side of the transfer column and reset to the second position. The pawl can be clamped against the second ratchet tooth and the third ratchet tooth in the first position. When the pawl is clamped against any one of the first ratchet tooth, the second ratchet tooth and the third ratchet tooth, the transfer column is restricted from rotating in the reverse direction. The circumferential side of the adapter is also convexly provided with a limit strip extending in the circumferential direction and arranged circumferentially opposite to the second position, the end face of the limit strip close to the first ratchet tooth has a first guide slope that can drive the pawl to move from the second position to the first position when the adapter column rotates forward and is opposite to the ratchet, and the end face of the limit strip close to the third ratchet tooth has a second guide slope that can drive the pawl to move from the second position to the third position when the adapter column rotates forward and is opposite to the ratchet.

4. The drying device according to claim 3, characterized in that: A limiting groove is provided on the outer side of the transfer column; A first ratchet, a second ratchet, a third ratchet, a pawl and a limit strip, wherein the limit strip is spaced apart from the groove wall of the limit strip, the first ratchet is located in front of the limit strip in the positive rotation direction of the adapter column, and the second ratchet and the third ratchet are located on the same side of the limit strip in the axial direction of the adapter column.

5. The drying device according to claim 4, characterized in that: A portion of the groove wall of the limiting groove forms a first ratchet tooth.

6. The drying device according to claim 3, characterized in that: The outer circumferential side surface of the adapter column is also provided with a first protrusion, a second protrusion and a third protrusion at intervals in the circumferential direction, wherein the first protrusion is located at a ready-to-push position when the pawl is clamped against the first ratchet tooth, the second protrusion is located at a ready-to-push position when the pawl is clamped against the second ratchet tooth, and the third protrusion is located at a ready-to-push position when the pawl is clamped against the third ratchet tooth; The driver includes a pushing member and a driving member that drives the pushing member to reciprocate along a straight line and pushes the pushing member toward a to-be-pushed position. The driving member can push the first protrusion through the pushing member when the first protrusion is in the to-be-pushed position, so that the sealing member rotates positively from the first placement state to the second placement state. The driving member can push the second protrusion through the pushing member when the second protrusion is in the to-be-pushed position, so that the sealing member rotates positively from the second placement state to the third placement state. The driving member can push the third protrusion through the pushing member when the third protrusion is in the to-be-pushed position, so that the sealing member rotates positively from the third placement state to the fourth placement state, wherein the connecting member can drive the pawl to move from the first position to the second position when the sealing member is in the fourth placement state.

7. The drying device according to claim 6, characterized in that: There are at least two first protrusions, which are spaced apart in the axial direction of the adapter column; And / or, at least two second protrusions are provided and are spaced apart in the axial direction of the adapter column; And / or, there are at least two third protrusions, which are spaced apart in the axial direction of the adapter column.

8. The drying device according to claim 6, characterized in that: The reversing mechanism also includes a connecting rod and a guide member. The connecting rod is used to connect the push member and the driving member. The extension direction of the connecting rod is parallel to the movement direction of the push member. The guide member has a guide hole for the connecting rod to pass through. The cross-sectional shape of the guide hole is the same as that of the connecting rod.

9. The drying device according to claim 8, characterized in that: The reversing mechanism also includes an anti-shake structure which elastically abuts against the side of the connecting rod away from the transfer column to prevent the connecting rod from tilting.

10. A dishwasher, characterized in that: The method comprises a drying device as claimed in any one of claims 1 to 9.

Images