Fan structure and household appliance

Abstract

The invention provides a fan structure and a household appliance, and the fan structure comprises a volute, a centrifugal fan blade, a first air outlet channel and a second air outlet channel; an air outlet is formed in the volute, and the centrifugal fan blades are rotatably mounted in the volute and used for exhausting air through the air outlet during rotation; the volute can rotate to a first position and a second position, and at the first position, the air outlet communicates with the first air outlet channel; at the second position, the air outlet is communicated with the second air outlet channel; the centrifugal fan blade and the volute are driven by the same driving mechanism to rotate; the fan structure has at least two states, in the first state, the driving mechanism drives the centrifugal fan blades to rotate, and the volute keeps still; and in the second state, the driving mechanism drives the volute to rotate to the first position or the second position. The switching of the air outlet channels is driven by using the driving mechanism of the centrifugal fan blade, so that at least one set of driving mechanism can be saved, and the driving cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of fans, and in particular relates to a fan structure and a household appliance. Background Art

[0002] At present, up and down air conditioners can achieve carpet-style heating and shower-style cooling, which are comfortable and have great development prospects. For up and down air conditioners, the up and down air needs to be switched through a corresponding switching mechanism so that the air conditioner can discharge air through different air outlet channels. Among them, up and down air conditioners generally need to set up a separate driving mechanism to provide power for switching the air outlet channels, which will increase the driving cost, so this problem needs to be solved. Summary of the invention

[0003] Therefore, the present invention provides a fan structure and a household appliance, which can solve the technical problem in the prior art that an additional driving mechanism is required to provide power for switching the air outlet channel, resulting in high driving costs.

[0004] In order to solve the above problems, the present invention provides a fan structure, which includes a volute, a centrifugal fan blade, a first air outlet channel and a second air outlet channel; the volute is provided with an air outlet, the centrifugal fan blade is rotatably installed in the volute, and the centrifugal fan blade is used to exhaust air through the air outlet when rotating;

[0005] The volute is also rotatable, and the centrifugal fan blades and the volute are both driven to rotate by the same driving mechanism;

[0006] Wherein, the fan structure has at least two states. In the first state, the driving mechanism drives the centrifugal fan blades to rotate, and the volute remains stationary; in the second state, the driving mechanism can drive the volute to rotate, so that the volute rotates to a first position or a second position; wherein, in the first position, the air outlet is connected to the first air outlet channel; in the second position, the air outlet is connected to the second air outlet channel.

[0007] In some embodiments, the centrifugal fan blades are rotated by a rotating shaft, and the rotating shaft is drivingly connected to the volute through a clutch mechanism;

[0008] Among them, in the first state, the driving mechanism drives the centrifugal fan blades to rotate by driving the rotating shaft, and the rotating shaft also drives the clutch mechanism to disconnect, so that the volute can remain stationary; in the second state, the driving mechanism drives the rotating shaft to rotate, so that the rotating shaft drives the clutch mechanism to conduct, thereby driving the volute to rotate.

[0009] In some embodiments, the driving mechanism is used to drive the rotating shaft to rotate forward or reverse;

[0010] Wherein, in the first state, the rotating shaft drives the centrifugal fan blades to rotate and drives the clutch mechanism to be disconnected by forward rotation; in the second state, the rotating shaft drives the clutch mechanism to be connected by reverse rotation.

[0011] In some embodiments, the clutch mechanism includes a ratchet, a transmission member and a first elastic member, and the transmission member is movably disposed on the volute;

[0012] In which, the clutch mechanism is connected to the rotating shaft through the ratchet, and the rotating shaft is used to drive the ratchet to rotate; in the first state, the rotating shaft drives the ratchet to rotate in a set direction, and the teeth of the ratchet push the transmission member to move, so that the transmission member makes way for the rotation path of the ratchet to disconnect the clutch mechanism; in the second state, the rotating shaft drives the ratchet to rotate in a direction opposite to the set direction, and the first elastic member drives the transmission member to move to the rotation path of the teeth of the ratchet, so that the teeth of the ratchet can abut against the transmission member, and drive the volute to rotate through the transmission member to conduct the clutch mechanism.

[0013] In some embodiments, the transmission member is arranged on the volute by a rotational connection, and the transmission member has a first end and a second end relative to each other; in the first state, the teeth of the ratchet drive the transmission member to move by pushing the side of the second end; in the second state, the transmission member is abutted against the teeth through the end face of the second end, and the transmission member drives the volute to rotate through the first end.

[0014] In some embodiments, a middle portion of the transmission member between the first end and the second end is rotatably connected to the volute via a rotating shaft;

[0015] And / or, the transmission member is an elastic block, and the first end is fixed on the volute.

[0016] In some embodiments, the fan structure further includes a locking mechanism;

[0017] The locking mechanism locks the volute in the first state so that the volute remains stationary; and the locking mechanism unlocks the volute in the second state so that the volute can be driven by the driving mechanism to rotate.

[0018] In some embodiments, the centrifugal fan blade rotates in a first direction in the first state, and the volute rotates in a second direction in the second state, and the first direction is opposite to the second direction;

[0019] The locking mechanism comprises a clamping block, a clamping portion and a second elastic member, one of the clamping block and the clamping portion is arranged on the volute, and the clamping block is movable;

[0020] Wherein, the second elastic member is used to push the clamping block to move to the clamping position, so that the clamping block can be clamped with the clamping portion when the volute rotates in the first direction to lock the volute; when the volute rotates in the second direction, the clamping block can be driven to withdraw from the clamping portion to unlock the volute.

[0021] In some embodiments, the clamping block is located on the volute, and the clamping block has a first a end and a second a end relative to each other, and the clamping block is rotatably connected to the volute via the first a end; the second elastic member is arranged between the clamping block and the volute; the second a end is opened relative to the volute when in the clamping position, and cooperates with the volute to form a bayonet therebetween; wherein, the clamping portion is inserted into the clamping block via the bayonet to be clamped with the clamping portion.

[0022] In some embodiments, the first air outlet channel has a first air inlet end, and the first air inlet end is fixed on the radial outer side of the volute; when in the first position, the first air outlet channel is connected to the air outlet through the first air inlet end; wherein, when the volute rotates in the second direction and drives the block to pass through the first air inlet end, it can be pushed by the first air inlet end to be closed;

[0023] And / or, the second air outlet channel has a second air inlet end, and the second air inlet end is fixed on the radially outer side of the volute; when in the second position, the second air outlet channel is connected with the air outlet through the second air inlet end; wherein, when the volute rotates in the second direction and drives the block to pass through the second air inlet end, it can be pushed by the second air inlet end to close.

[0024] In some embodiments, the clamping portion includes a first clamping portion disposed on the first air outlet channel and a second clamping portion disposed on the second air outlet channel;

[0025] Wherein, the clamping block is used to clamp with the first clamping portion when the volute rotates to the first position, and to clamp with the second clamping portion when the volute rotates to the second position.

[0026] In some embodiments, an air inlet is provided on the axial side of the volute, and air is taken in through the air inlet when the centrifugal fan blades rotate.

[0027] In some embodiments, the first air outlet channel has a first air inlet end, the second air outlet channel has a second air inlet end, and the volute is provided with an avoidance groove;

[0028] Among them, when in the first position, the air outlet is opposite to the first air inlet end, so that the air outlet is connected to the first air outlet channel through the first air inlet end; and the avoidance groove is opposite to the second air inlet end when in the first position, so that the second air inlet end can be connected to the air inlet; and / or, when in the second position, the air outlet is opposite to the second air inlet end, so that the air outlet is connected to the second air outlet channel through the second air inlet end; and the avoidance groove is opposite to the first air inlet end when in the second position, so that the second air inlet end can be connected to the air inlet.

[0029] In some embodiments, the fan structure further includes a fixed shell, the volute is rotatably disposed in the fixed shell, and a gap is provided between the air inlet and a side wall of the fixed shell; the fixed shell has a first side and a second side, the first air outlet channel is installed on the first side, and the second air outlet channel is installed on the second side; the first side is provided with a first through hole, and the second side is provided with a second through hole;

[0030] Wherein, a sealing structure is provided on the fixed shell, and the volute is used to seal and cooperate with the sealing structure when it is rotated to the first position, so as to block the connection between the first through hole and the air inlet, and to connect the air inlet with the second through hole; the volute is used to seal and cooperate with the sealing structure when it is rotated to the second position, so as to block the connection between the second through hole and the air inlet, and to connect the air inlet with the first through hole.

[0031] In some embodiments, the sealing structure includes a sealing strip disposed on the inner wall of the fixed shell; wherein, when the volute rotates to the first position or the second position, the sealing structure seals with the outer wall of the volute through the sealing strip.

[0032] The present invention further provides a household appliance, comprising any one of the above-mentioned fan structures.

[0033] In some embodiments, the household appliance is an air conditioner or a dehumidifier.

[0034] A fan structure and household appliance provided by the present invention have the following beneficial effects:

[0035] 1. The driving mechanism of the present invention has dual functions. It can drive the centrifugal fan blades to rotate to realize the normal air outlet function of the fan structure of the present invention, and can also drive the volute to rotate to realize the switching of the air outlet channel. Compared with the prior art that requires a separate driving mechanism to provide power for the switching of the air outlet channel, the present invention uses the driving mechanism of the centrifugal fan blades to drive the switching of the air outlet channel, thereby saving at least one set of driving mechanisms and reducing the driving cost.

[0036] 2. The solution of the present invention switches the air duct by rotating the volute. The volute is an integral component. Compared with the prior art, the volute of the present invention has a complete air duct profile and will not cause air volume loss, so the air volume can be increased. The air volume is increased at the same speed, and the fan speed can be reduced at the same level of air volume, thereby reducing noise.

[0037] 3. The fan mechanism of the present invention can realize one-way air outlet through the first air outlet channel or the second air outlet channel, and when realizing one-way air outlet, air can be taken in through the other air outlet channel, thereby accelerating indoor air circulation and improving the utilization rate of energy in the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0039] Figure 1 is an exploded schematic diagram of an air conditioner provided by an embodiment of the present invention;

[0040] Figure 2 is an exploded schematic diagram of a fan structure provided by an embodiment of the present invention;

[0041] Figure 3 is a cross-sectional view of a fan structure provided by an embodiment of the present invention;

[0042] Figure 4 It is a schematic diagram reflecting the clutch mechanism;

[0043] Figure 5 is a schematic diagram reflecting the case where the air outlet of the volute is connected to the first air outlet channel;

[0044] Figure 6 yes Figure 5 The enlarged schematic diagram of point A in the middle;

[0045] Figure 7 is a schematic diagram reflecting the case where the air outlet of the volute is connected to the second air outlet channel;

[0046] Figure 8 It is a schematic diagram reflecting that when the volute drives the block along the second direction to pass through the air inlet end of the first air outlet channel, the block is pushed and closed.

[0047] The accompanying drawings are marked as follows:

[0048] 1a, decorative plate; 1b, top cover; 1c, air inlet panel; 2, first air outlet channel; 3, second air outlet channel; 3, heat exchanger; 4, fixed shell; 5, centrifugal fan blade; 6, volute; 7, sealing strip; 8, ratchet; 9, bearing; 10, rubber cap; 12, motor; 13, block; 14, rotating shaft; 15, transmission member; 16, rotating shaft; 17, first elastic member; 18, ratchet box; 19, clamping part; 20, second elastic member; 21, groove; 22, baffle; 23, first air inlet end; 32, second air inlet end; 41, rear shell; 4 2. front shell; 61. volute body; 62. volute cover; 81. gear; 101. air inlet; 102. air inlet; 130. bayonet; 131. first a end; 132. second a end; 150. second end; 151. first end; 152. end face; 153. side face; 191. first clamping part; 192. second clamping part; 201. upper air outlet; 301. lower air outlet; 401. first through hole; 402. second through hole; 601. air outlet; 602. avoidance groove; a. set direction; b. second direction; c. first direction. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0053] See also Figure 1-8 As shown, according to an embodiment of the present invention, a fan structure is provided, which includes a volute 6, a centrifugal fan blade 5, a first air outlet channel 2 and a second air outlet channel 3. The volute 6 is provided with an air outlet 601, and the centrifugal fan blade 5 is rotatably installed in the volute 6. The centrifugal fan blade 5 is used to exhaust air through the air outlet 601 when rotating. It should be noted that the air outlet 601 is generally located radially outside the centrifugal fan blade 5.

[0054] The volute 6 can be rotated to a first position and a second position. Figure 5 As shown, when the volute 6 is in the first position, the air outlet 601 on the volute 6 is connected to the first air outlet channel 2, so that the air outlet 601 exhausts air through the first air outlet channel 2. Figure 7 As shown, when the volute 6 is in the second position, the air outlet 601 is in communication with the second air outlet channel 3, so that the air outlet 601 exhausts air through the second air outlet channel 3. In some embodiments, when the volute 6 is in the first position, the air outlet 601 is opposite to the air inlet of the first air outlet channel 2, so that the air outlet 601 is in communication with the first air outlet channel 2. Similarly, when the volute 6 is in the second position, the air outlet 601 is opposite to the air inlet of the second air outlet channel 3, so that the air outlet 601 is in communication with the second air outlet channel 3.

[0055] The aforementioned centrifugal fan blades 5 and volute 6 are both used to be driven to rotate by the same driving mechanism. Among them, the fan structure of the present invention has at least two states. Among them, when the fan structure is in the first state, the driving mechanism drives the centrifugal fan blades 5 to rotate, and the volute 6 remains stationary. At this time, the fan structure exhausts air through the first air outlet channel 2 or the second air outlet channel 3 connected to the air outlet 601 to achieve the normal exhaust function of the fan structure. When the fan structure is in the second state, the driving mechanism can drive the volute 6 to rotate, so that the volute 6 is turned to the aforementioned first position or second position, so that the air outlet 601 is connected to the first air outlet channel 2 or the second air outlet channel 3, so as to switch the air outlet channel of the fan structure.

[0056] In the above example, the driving mechanism of the present invention has a dual function, which can drive the centrifugal fan blades 5 to rotate to realize the normal air outlet function of the fan structure of the present invention, and can also drive the volute 6 to rotate to realize the switching of the air outlet channel. Compared with the prior art that requires a separate driving mechanism to provide power for the switching of the air outlet channel, the present invention uses the driving mechanism of the centrifugal fan blades 5 to drive the switching of the air outlet channel, thereby saving at least one set of driving mechanisms and reducing the driving cost.

[0057] It should be noted that the solution of the present invention switches the air duct by rotating the volute 6, which is an integral component. Compared with the prior art, the volute 6 of the present invention has a complete air duct profile, which will not cause air volume loss, and thus can increase the air volume. The air volume is increased at the same speed, and the fan speed can be reduced at the same level of air volume, thereby reducing noise.

[0058] In some embodiments, Figure 2 and Figure 3 As shown, the aforementioned driving mechanism includes a motor 12, and the driving mechanism drives the centrifugal fan blades 5 and the volute 6 to rotate through the same motor 12. The motor 12 may sometimes also be referred to as a fan.

[0059] In order to achieve the purpose that the centrifugal fan blades 5 and the volute 6 are both driven by the same driving mechanism to rotate, in some embodiments, as Figure 3 As shown, the aforementioned centrifugal fan blades 5 are rotated by the rotating shaft 14, and the centrifugal fan blades 5 can be sleeved on the rotating shaft 14. The rotating shaft 14 is connected to the volute 6 by a clutch mechanism. The clutch mechanism is used to disconnect or conduct, so as to cut off the driving connection between the rotating shaft 14 and the volute 6 when disconnected, and transmit the driving connection between the rotating shaft 14 and the volute 6 when conducted. Among them, in the first state, the driving mechanism drives the centrifugal fan blades 5 to rotate by driving the rotating shaft 14 to rotate, and the rotating shaft 14 also drives the clutch mechanism to disconnect, so that the volute 6 can remain motionless. In the second state, the driving mechanism drives the rotating shaft 14 to rotate, so that the rotating shaft 14 drives the clutch mechanism to conduct, so as to drive the volute 6 to rotate.

[0060] In the above example, the driving mechanism, the rotating shaft 14 of the centrifugal fan blade 5 and the clutch mechanism cooperate with each other to achieve the purpose of the centrifugal fan blade 5 and the volute 6 being driven to rotate by the same driving mechanism, so as to realize the normal air outlet function and the air outlet channel switching function of the fan structure of the present invention.

[0061] In some embodiments, the aforementioned driving mechanism is used to drive the rotating shaft 14 to rotate forward or reversely. For example, the driving mechanism can drive the rotating shaft 14 to rotate forward or reversely through the motor 12.

[0062] Among them, when the fan structure is in the aforementioned first state, the driving mechanism drives the rotating shaft 14 to rotate forward, and the rotating shaft 14 drives the centrifugal fan blades 5 to rotate and drives the clutch mechanism to disconnect through the forward rotation. In this first state, the clutch mechanism cuts off the driving connection between the rotating shaft 14 and the volute 6, so that there is no power transmission between the rotating shaft 14 and the volute 6, which is conducive to keeping the volute 6 motionless. At this time, the rotating shaft 14 drives the centrifugal fan blades 5 to rotate to realize the normal air outlet function of the fan structure.

[0063] When the fan structure is in the second state, the driving mechanism drives the rotating shaft 14 to reverse, and the rotating shaft 14 drives the clutch mechanism to turn on by reversing. The clutch mechanism is turned on, so that the rotating shaft 14 drives the volute 6 to rotate to the first position or the second position to switch the air outlet channel.

[0064] In some embodiments, the aforementioned clutch mechanism may be a mechanical clutch mechanism driven by the rotating shaft 14 to disconnect or connect, which can save the use of electronic components and reduce costs.

[0065] In order to realize the function of disconnecting or connecting the aforementioned clutch mechanism driven by the rotating shaft 14, in some embodiments, as Figure 4As shown, the aforementioned clutch mechanism may include a ratchet 8, a transmission member 15 and a first elastic member 17. The transmission member 15 is movably arranged on the volute 6. The clutch mechanism is connected to the rotating shaft 14 through the ratchet 8. The rotating shaft 14 is used to drive the ratchet 8 to rotate. In the first state, the rotating shaft 14 drives the ratchet 8 to rotate along the set direction a, and the gear teeth 81 of the ratchet 8 push the transmission member 15 to move, so that the transmission member 15 makes way for the rotation path of the ratchet 8 to disconnect the clutch mechanism. In the first state, there is no transmission connection relationship between the ratchet 8 and the transmission member 15. In the second state, the rotating shaft 14 drives the ratchet 8 to rotate in the direction opposite to the set direction a, and the first elastic member 17 drives the transmission member 15 to move to the rotation path of the gear teeth 81 of the ratchet 8, so that the gear teeth 81 of the ratchet 8 can abut the transmission member 15, and the volute 6 is driven to rotate through the transmission member 15 to conduct the clutch mechanism. In the second state, the ratchet 8 is transmission-connected to the volute 6 through the transmission member 15. It should be noted that: in the first state, the transmission member 15 is pushed by the gear teeth 81 of the ratchet 8 to exert force on the first elastic member 17, so that the first elastic member 17 undergoes elastic deformation. In the second state, the first elastic member 17 releases the elastic force to drive the transmission member 15 to move to the rotation path of the gear teeth 81 of the ratchet 8. The first elastic member 17 can be a spring or the like.

[0066] In the above example, the ratchet 8, the transmission member 15 and the first elastic member 17 cooperate with each other to realize the function of the aforementioned clutch mechanism being driven by the rotating shaft 14 to disconnect or conduct.

[0067] In a specific application example, the ratchet 8 can be sleeved on the rotating shaft 14, so that the rotating shaft 14 can drive the ratchet 8 to rotate in the same direction. Since the rotating shaft 14 rotates forward in the first state, the ratchet 8 also rotates forward with the rotating shaft 14 in the first state, that is, the set direction a is the direction of the rotating shaft 14 rotating forward.

[0068] In a specific application example, Figure 4 As shown, the transmission member 15 can be arranged on the volute 6 in a rotatable connection. The transmission member 15 has a first end 151 and a second end 150 opposite to each other. In the first state, the gear teeth 81 of the ratchet 8 drive the transmission member 15 to move by pushing the side surface 153 of the second end, so that the transmission member 15 makes way for the rotation path of the ratchet 8. In the second state, the transmission member 15 abuts against the gear teeth 81 through the end surface 152 of the second end, and the transmission member 15 drives the volute 6 to rotate through the first end 151.

[0069] In the above example, the transmission member 15 forms a lever structure on the volute 6. In the second state, the gear teeth 81 of the ratchet 8 press against the end surface 152 of the second end of the transmission member 15, and the transmission member 15 transmits the force of the ratchet 8 to the first end 151, and drives the volute 6 to rotate through the first end 151. In the first state, the gear teeth 81 of the ratchet 8 drive the transmission member 15 to clear the rotation path of the ratchet 8 by pushing the side surface 153 of the second end. Among them, the lever structure has the advantage of labor saving, and the structure is also simple, which is convenient for implementation.

[0070] In some embodiments, Figure 4 As shown, the middle portion of the transmission member 15 between the first end 151 and the second end 150 is rotatably connected to the volute 6 via the rotating shaft 16, so as to achieve the purpose of setting the transmission member 15 on the volute 6 in a rotatably connected manner.

[0071] In some embodiments, the transmission member 15 can be an elastic block, and the first end 151 of the transmission member 15 is fixed to the volute 6, for example, the first end 151 can be glued to the volute 6 by glue or the like. Among them, since the transmission member 15 is an elastic block, the transmission member 15 can be elastically deformed, and even if the first end 151 of the transmission member is fixed to the volute 6, it will not affect the rotation of the transmission member 15. In addition, since the first end 151 of the transmission member is fixed to the volute 6, the connection stability between the transmission member 15 and the volute 6 can be improved, so that the transmission member 15 can fully transmit the force of the ratchet 8 to the volute 6 in the second state, which is conducive to improving the stability of the transmission member 15 driving the volute 6 to rotate.

[0072] In some embodiments, Figure 4 As shown, the aforementioned fan structure further includes a ratchet box 18, which is fixed to the volute 6. The aforementioned ratchet 8 is located in the ratchet box 18, and the aforementioned transmission member 15 is arranged on the ratchet box 18 to be connected to the volute 6 through the ratchet box 18. The aforementioned first elastic member 17 is also arranged in the ratchet box 18.

[0073] For ease of understanding, the reversing process of the volute 6 is described below. When the driving mechanism drives the centrifugal fan blades 5 and the volute 6 to rotate through the motor 12, the volute 6 in the present invention completes the reversal through the following steps:

[0074] 1. When the centrifugal fan blade 5 delivers air, Figure 4 As shown, the motor 12 rotates forward and drives the centrifugal fan blade 5 to rotate counterclockwise, and the ratchet wheel 8 rotates counterclockwise following the rotating shaft 14. When the ratchet wheel 8 rotates counterclockwise, the arc-shaped tooth surface of the wheel teeth 81 of the ratchet wheel 8 pushes the transmission member 15 to compress the first elastic member 17, and the rotation of the ratchet wheel 8 is not affected by the transmission member 15;

[0075] 2. When the volute 6 needs to rotate and reverse, such as Figure 4As shown, the motor 12 decelerates to a stop and then reverses (clockwise in this embodiment), and the ratchet 8 rotates clockwise following the rotating shaft 14. When the ratchet 8 rotates clockwise, the straight tooth surface of the gear teeth 81 of the ratchet is supported by the transmission member 15, and then the transmission member 15 transmits the force of the clockwise rotation of the ratchet 8 to the ratchet box 18, and drives the volute 6 to rotate clockwise through the ratchet box 18;

[0076] 3. After the volute 6 rotates to the right position, the motor 12 stops and starts to rotate forward to supply air.

[0077] In some embodiments, the aforementioned fan structure may further include a locking mechanism. The locking mechanism locks the volute 6 in the first state so that the volute 6 remains stationary, and the locking mechanism unlocks the volute 6 in the second state so that the volute 6 can be driven by the driving mechanism to rotate.

[0078] In the above example, in the first state, since the locking mechanism locks the volute 6, the volute 6 can be kept stationary in the first state, which is beneficial to improve the stability of the centrifugal fan blades 5 rotating to discharge air. In addition, in the second state, the locking mechanism unlocks the volute 6, so as not to affect the fan structure's switching function of the air duct in the second state.

[0079] In order to realize the function of the aforementioned locking mechanism, in some embodiments, as Figure 5 and Figure 6 As shown, the aforementioned centrifugal fan blade 5 rotates along the first direction c in the first state, and the volute 6 rotates along the second direction b in the second state. The first direction c is opposite to the second direction b. The aforementioned locking mechanism includes a block 13, a clamping portion 19 and a second elastic member 20. One of the block 13 and the clamping portion 19 is arranged on the volute 6, and the block 13 is movable. Among them, the second elastic member 20 is used to push the block 13 to move to the clamping position, so that the block 13 can be clamped with the clamping portion 19 when the volute 6 rotates in the first direction c to lock the volute 6. When the volute 6 rotates in the second direction b, it can drive the block 13 to withdraw from the clamping portion 19 to unlock the volute 6.

[0080] In the above example, the centrifugal fan blades 5 rotate in the first direction c in the first state to perform normal rotation and discharge, and at this time, if the volute 6 is also affected by the centrifugal fan blades 5 and rotates in the first direction c, it will only make the clamping block 13 and the clamping portion 19 clamped more tightly, so that the volute 6 is fixed more tightly, which is conducive to keeping the volute 6 motionless in the first state. When the volute 6 rotates in the second direction b in the second state to switch the air duct, the volute 6 can drive the clamping block 13 to exit the clamping portion 19 in the second direction b, so that the volute 6 can be unlocked smoothly, and the rotation of the volute 6 in the second state will not be affected.

[0081] In order to achieve the purpose of the aforementioned clamping block 13 and the clamping portion 19, in some embodiments, as Figure 5 and Figure 6 As shown, the aforementioned block 13 can be located on the volute 6, and the block 13 has a first a-end 131 and a second a-end 132 opposite to each other. The block 13 is rotatably connected to the volute 6 through the first a-end 131, for example, the first a-end 131 can be hinged with the volute 6 to achieve a rotatable connection between the two. The aforementioned second elastic member 20 is arranged between the block 13 and the volute 6, and preferably, the second elastic member 20 is arranged between the volute 6 and the second a-end 132 of the block 13. The second a-end 132 of the block 13 is opened relative to the volute 6 when in the aforementioned clamping position, and cooperates with the volute 6 to form a bayonet 130 between the two. Among them, the block 13 is inserted into the clamping portion 19 through the bayonet 130 to be clamped with the clamping portion 19.

[0082] It should be noted that: a limiting structure is provided on the volute 6. When the clamping block 13 is located at the clamping position, the limiting structure limits the clamping block 13 so that the second end a 132 of the clamping block 13 is located at the extreme opening position relative to the volute 6. At this time, the clamping block 13 cannot continue to open, so that the stability of the bayonet 130 can be maintained, so as to improve the stability of the clamping portion 19 and the bayonet 130. Among them, the clamping block 13 can achieve the limit by cooperating with the volute 6 through its own contour when it is in the clamping position.

[0083] In the above example, when the clamping block 13 is opened, it cooperates with the volute 6 to form a clamping slot 130 therebetween, and then the clamping block 13 is inserted through the clamping slot 130 for the aforementioned clamping portion 19 to be inserted, so that the clamping block 13 and the clamping portion 19 can be clamped together.

[0084] In some embodiments, Figure 8 As shown, the aforementioned first air outlet channel 2 has a first air inlet end 23, and the first air inlet end 23 can be fixed on the radial outer side of the volute 6. In the first position, the first air outlet channel 2 is connected to the air outlet 601 through the first air inlet end 23. When the volute 6 rotates in the second direction b and drives the block 13 to pass through the first air inlet end 23, it can be pushed by the first air inlet end 23 to close.

[0085] Similarly, if Figure 8 As shown, the aforementioned second air outlet channel 3 has a second air inlet end 32, and the second air inlet end 32 can be fixed on the radial outer side of the volute 6. In the second position, the second air outlet channel 3 is connected with the air outlet 601 through the second air inlet end 32. When the volute 6 rotates in the second direction b and drives the block 13 to pass through the second air inlet end 32, it can be pushed by the second air inlet end 32 to close.

[0086] In the above example, although the second end 150 of the block 13 is open relative to the volute 6, the block 13 can be pushed closed by the corresponding air inlet ends when it rotates with the volute 6 and passes through the first air inlet end 23 and the second air inlet end 32, so that the opened block 13 will not affect the normal rotation of the volute 6.

[0087] In some embodiments, Figure 6 As shown, the aforementioned volute 6 may be provided with a groove 21, and the clamping block 13 is located in the groove 21 when closed. The clamping block 13 may be in a plate shape.

[0088] In some embodiments, Figure 5 and Figure 7 As shown, the aforementioned clamping portion 19 may include a first clamping portion 191 disposed on the first air outlet channel 2 and a second clamping portion 192 disposed on the second air outlet channel 3. The clamping block 13 is used to clamp with the first clamping portion 191 when the volute 6 rotates to the first position (such as Figure 5 As shown), and when the volute 6 rotates to the second position, it is engaged with the second engaging portion 192 (as shown Figure 7 shown).

[0089] In the above example, by providing the clamping portion 19 on each air outlet channel so as to be clamped with the clamping block 13 when the volute 6 rotates to a corresponding position, the locking stability of the volute 6 at each position can be improved.

[0090] In some embodiments, the first clamping portion 191 can be integrally formed at the air inlet end of the first air outlet channel 2 to improve the connection stability between the first clamping portion 191 and the first air outlet channel 2. Similarly, the second clamping portion 192 can be integrally formed at the air inlet end of the second air outlet channel 3 to improve the connection stability between the second clamping portion 192 and the second air outlet channel 3.

[0091] In some embodiments, an air inlet 102 is provided on the axial side of the volute 6. When the centrifugal fan blade 5 rotates, air is taken in through the air inlet 102. The centrifugal fan blade 5 may be a double-suction centrifugal fan blade, and accordingly, the number of the air inlets 102 is two and distributed on both axial sides of the volute 6.

[0092] In some embodiments, the first air outlet channel 2 has a first air inlet end 23 , the second air outlet channel 3 has a second air inlet end 32 , and the volute 6 is provided with an avoidance groove 602 .

[0093] Wherein, in the first position, the air outlet 601 is opposite to the first air inlet end 23, so that the air outlet 601 is connected to the first air outlet channel 23 through the first air inlet end 23. And the avoidance groove 602 is opposite to the second air inlet end 32 in the first position, so that the second air inlet end 32 can be connected to the air inlet 102. And / or, in the second position, the air outlet 601 is opposite to the second air inlet end 32, so that the air outlet 601 is connected to the second air outlet channel 3 through the second air inlet end 32; and the avoidance groove 602 is opposite to the first air inlet end 23 in the second position, so that the second air inlet end 32 can be connected to the air inlet 102.

[0094] In the above example, since the second air inlet end 32 can be connected to the air inlet 102 in the first position, the air inlet 102 can be connected to the second air outlet 3 through the second air inlet end 32, and the second air outlet 3 is used as the air inlet. Similarly, since the first air inlet end 23 can be connected to the air inlet 102 in the second position, the air inlet 102 can be connected to the first air outlet 2 through the first air inlet end 23, and the first air outlet 2 is used as the air inlet. The purpose of such design is as follows: In some embodiments, the first air outlet 2 can be an upper air duct, and the second air outlet 3 can be a lower air duct. During the cooling process, the air conditioner blows out cold air through the upper air duct 201 of the first air outlet 2, and the cold air sinks and accumulates cold air in the lower part of the room. At this time, the air conditioner draws the cold air in the lower part of the room into the air conditioner through the second air outlet 3 and blows it out from the upper air duct 201, thereby efficiently utilizing the energy in the room and reducing the evaporator load. During the heating process, the air conditioner blows out hot air through the lower air outlet 301 of the second air outlet channel 3. The hot air floats up and accumulates heat in the upper part of the room. At this time, the air conditioner draws the hot air in the upper part of the room from the upper air outlet 201 into the air conditioner through the first air outlet channel 2 and blows it out from the lower air outlet 301, thereby efficiently utilizing the energy in the room and reducing the evaporator load.

[0095] In some embodiments, Figure 1 and Figure 2 As shown, the aforementioned fan structure may further include a fixed shell 4, the volute 6 is rotatably disposed in the fixed shell 4, and there is a gap between the air inlet 102 and the side wall of the fixed shell 4. The fixed shell 4 has a first side and a second side. The first air outlet channel 2 is installed on the first side, such as fixed on the first side; the second air outlet channel 3 is installed on the second side, such as fixed on the second side. The first side is provided with a first through hole 401, and the second side is provided with a second through hole 402. Among them, a sealing structure is provided on the fixed shell 4. As shown Figure 5As shown, the volute 6 is used to seal with the sealing structure when it rotates to the first position to block the communication between the first through hole 401 and the air inlet 102, and to connect the air inlet 102 with the second through hole 402 and the air inlet end of the second air outlet channel 3, so as to prevent the air from leaking from the second through hole 402 and the second air outlet channel 3, which is conducive to allowing the air from the second through hole 402 and the second air outlet channel 3 to enter the air inlet 102. Figure 7 As shown, the volute 6 is used to seal with the sealing structure when it rotates to the second position to block the connection between the second through hole 402 and the air inlet 102, and to connect the air inlet 102 with the first through hole 401 and the air inlet end of the first air outlet channel 2. This can prevent the air from leaking from the first through hole 401 and the first air outlet channel 2, which is beneficial for the air from the first through hole 401 and the first air outlet channel 2 to enter the air inlet 102.

[0096] In some embodiments, Figure 5 and Figure 7 As shown, the aforementioned sealing structure may include a sealing strip 7 disposed on the inner wall of the fixed housing 4. When the volute 6 rotates to the aforementioned first position or second position, the sealing structure seals with the outer wall of the volute 6 through the sealing strip 7.

[0097] It should be noted that the sealing strip 7 can be a wool strip, which is a part commonly used for sealing and is fixed on the injection molded part by fibers, which can block airflow.

[0098] The fan mechanism of the present invention can realize one-way air outlet through the first air outlet channel 2 or the second air outlet channel 3, and when realizing one-way air outlet, air can be taken in through the other air outlet channel, thereby accelerating indoor air circulation and improving the utilization rate of energy in the room. The fan mechanism of the present invention can more effectively utilize the energy utilization rate of the room air by re-inhaling the air from the top / bottom of the room into the air conditioner, thereby solving the problem of low energy utilization rate of air energy in traditional floor-standing rooms, which leads to high energy efficiency.

[0099] The present invention further provides a household appliance, which includes any of the above-mentioned fan structures. In particular, because the household appliance adopts the above-mentioned fan structure, compared with the prior art that requires a separate drive mechanism to provide power for switching the air outlet channel, the present invention uses the drive mechanism of the centrifugal fan blade 5 to drive the switching of the air outlet channel, thereby saving at least one set of drive mechanisms and reducing the drive cost.

[0100] In some embodiments, the aforementioned household appliance may be an air conditioner or a dehumidifier, etc.

[0101] Wherein, when the household appliance is an air conditioner, the air conditioner may be a cabinet air conditioner, such as Figure 1 and Figure 2As shown, the air conditioner further includes a heat exchanger 3 and a casing, the aforementioned fixed casing 4 is arranged in the casing, the casing is provided with an air inlet 101, and the heat exchanger 3 is arranged inside the casing and opposite to the air inlet 101. The heat exchanger 3 can be arranged at the upper and lower ends of the fan structure. The air conditioner of the present invention can realize the upper and lower air outlet switching and can more effectively utilize the room air energy.

[0102] like Figure 1 and Figure 2 As shown, the above-mentioned casing includes an air inlet panel 1c, a decorative panel 1a and a top cover 1b, and the aforementioned air inlet hole 101 is arranged on the air inlet panel 1c. The decorative panel 1a is located on the front side of the air conditioner, the air inlet panel 1c is located on the rear side of the air conditioner, and the top cover 1b is located on the top of the air conditioner. The aforementioned first air outlet channel 2, the second air outlet channel 3 and the fixed shell 4 cooperate to form an air duct component. The heat exchanger 3 is placed on the rear side of the air duct component, and is divided into an upper and lower part, which are respectively placed obliquely above and obliquely below the air duct component. An air inlet hole 101 is respectively arranged at the upper and lower ends of the air inlet panel 1c at the corresponding positions of the heat exchanger 3.

[0103] like Figure 2 As shown, the aforementioned fixed shell 4 is formed by buckling the front shell 42 and the rear shell 41. The aforementioned volute 6 is formed by buckling the volute body 61 and the volute cover 62. The front shell 42 and the rear shell 41 constitute the fixed shell 4, and the upper and lower ends of the fixed shell 4 are provided with through holes for airflow to pass through. Specifically, the upper side of the fixed shell 4 (i.e., the aforementioned first side) is provided with a first through hole 401, and the lower side of the fixed shell 4 (i.e., the aforementioned second side) is provided with a second through hole 402. The aforementioned driving mechanism includes a motor 12, and the driving mechanism drives the centrifugal fan blades 5 and the volute 6 to rotate through the same motor 12. The motor 12 is sometimes also referred to as a fan. The body of the motor 12 is directly fixed on the rear shell 41 of the fixed shell 4, and the body of the motor 12 is far away from the centrifugal fan blades 5. The aforementioned rotating shaft 14 can be the motor shaft of the motor 12, and the rotating shaft 14 needs to be designed with a longer size. In order to prevent the rotating shaft 14 from being too long and causing poor overall stiffness, the centrifugal fan blades 5 have a large amplitude of jumping up and down when rotating, which poses a risk of collision. In the present invention, one end of the rotating shaft 14 away from the motor 12 body is fixed to the front shell 42 of the fixed shell 4, so that the rotating shaft 14 has a fulcrum support on the front shell 42 and the rear shell 41. At the same time, a bearing 9 is arranged at the fixed position of the rotating shaft 14 and the front shell 42 to ensure the smoothness of the rotation of the rotating shaft 14, and a rubber cap 10 is sleeved on the outside of the bearing 9 for shock absorption.

[0104] In some embodiments, Figure 2As shown, the aforementioned first air outlet channel 2 is an upper air outlet channel, and the aforementioned second air outlet channel 3 is a lower air outlet channel. The first air outlet channel 2 forms an upper air outlet 201 at the top of the air conditioner, and the second air outlet channel 3 forms a lower air outlet 301 at the bottom of the air conditioner. The fan structure of the present invention can achieve upper air outlet through the upper air outlet channel, and achieve lower air outlet through the lower air outlet channel. The working state of the single upper and single lower air outlet modes of the fan structure of the present invention combined with the cooling and heating modes of the air conditioner is as follows:

[0105] 1. Cooling mode

[0106] like Figure 5 As shown, when the air conditioner is cooling, the cold air is blown out from the top of the air conditioner through the first air outlet channel 2, and the "bath-style cooling" is realized by utilizing the principle that the cold air has a high density and sinks after being blown out. The temperature in the room is adjusted while preventing the cold air from blowing directly on people and affecting their comfort. At this time, the air outlet 601 of the volute 6 in the air conditioner rotates to an upward opening position, and the air outlet 601 is connected to the upper channel (i.e., the aforementioned first air outlet channel 2) to realize single upper air outlet. At this time, a total of two air flows are sucked into the volute 6: 1. The air on the rear side of the air conditioner is sucked into the air inlet of the volute 6 from the second through hole 402 on the lower side of the front shell 42 and the rear shell 41 after heat exchange in the heat exchanger 3; 2. The air near the lower part of the air conditioner is sucked into the air inlet of the volute 6 through the lower channel (i.e., the aforementioned second air outlet channel 3).

[0107] During the cooling process, the upper air vent 201 at the top of the air conditioner blows out cold air, which sinks and accumulates cold energy in the lower part of the room. The temperature in the lower part of the room becomes lower, but the cold air at this position does not act on the human activity area, resulting in energy waste. In the present invention, the air conditioner can suck the cold air in the lower part of the room from the air vent into the air conditioner and then blow it out from the upper air vent 201, which efficiently utilizes the energy in the room and reduces the load of the evaporator. Therefore, the heat exchange area of ​​the heat exchanger 3 can be reduced. When the upper air is discharged, the upper part of the heat exchanger 3 is closed, and the lower part of the heat exchanger 3 is working. Since the upper part of the heat exchanger 3 is not working, in order to prevent the normal temperature air that has not been heat exchanged from being sucked into the air duct, a baffle 22 is provided on the volute 6 to isolate the air in the upper part of the volute 6. A sealing structure such as a sealing strip 7 is provided on the inner side of both the front shell 42 and the rear shell 41 of the fixed shell 4, and the sealing structure cooperates with the baffle on the volute 6 to play a sealing role.

[0108] 2. Heating mode

[0109] like Figure 7As shown, when the air conditioner is heating, the hot air is blown out from the lower air outlet 301 of the air conditioner, and the "carpet-style heating" is realized by utilizing the principle that the hot air has a low density and floats up after being blown out. The hot air blows directly on people, improving the heating comfort. At this time, the air outlet 601 of the volute 6 in the air conditioner rotates to a downward opening position, and the air outlet 601 is connected to the lower channel (i.e., the aforementioned second air outlet channel 3) to realize single downward air outlet. The lower half of the heat exchanger 3 is closed, and the upper half of the heat exchanger 3 is working. Similarly, a total of two air flows are sucked into the volute 6: 1. The air flow passing through the heat exchanger 3 enters from the first through hole 401 on the upper side of the front shell 42 and the rear shell 41; 2. The air in the upper part of the room enters through the upper channel (i.e., the aforementioned first air outlet channel 2).

[0110] During the heating process, the hot air blown out of the lower air outlet 301 of the air conditioner floats upward and accumulates heat in the upper part of the room. By sucking the hot air in the upper part of the room from the upper air outlet 201 into the air conditioner and then blowing it out from the lower air outlet 301, the energy in the room is efficiently utilized.

[0111] Since the first air outlet channel 2 and the second air outlet channel 3 are both cold chambers in the refrigeration mode, if a motor drive mechanism is set in the air duct, it is necessary to increase the motor insulation measures to prevent water from entering the motor, which will lead to a complex motion structure and low assembly efficiency. And because the volute 6 is large in size and heavy in weight, a motor with a large torque is required to drive it to rotate. Correspondingly, the large torque motor is large in size, occupies the air duct space, and affects the air volume of the whole machine. In the present invention, the volute 6 is directly driven by the motor 12 of the centrifugal fan blade 5, which reduces the use of the motor and can effectively utilize the large torque of the motor 12 of the centrifugal fan blade. It should be noted here that the motor 12 of the centrifugal fan blade is sometimes also called a fan.

[0112] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A fan structure, characterized in that: The invention comprises a volute (6), a centrifugal fan blade (5), a first air outlet channel (2) and a second air outlet channel (3); the volute (6) is provided with an air outlet (601); the centrifugal fan blade (5) is rotatably mounted in the volute (6); and the centrifugal fan blade (5) is used to exhaust air through the air outlet (601) when rotating; The volute (6) is also rotatable, and the centrifugal fan blades (5) and the volute (6) are both driven to rotate by the same driving mechanism; The fan structure has at least two states. In the first state, the driving mechanism drives the centrifugal fan blades (5) to rotate, and the volute (6) remains stationary. In the second state, the driving mechanism can drive the volute (6) to rotate, so that the volute rotates to a first position or a second position. In the first position, the air outlet (601) is connected to the first air outlet channel (2); in the second position, the air outlet (601) is connected to the second air outlet channel (3).

2. The fan structure according to claim 1, characterized in that: The centrifugal fan blades (5) are rotated via a rotating shaft (14), and the rotating shaft (14) is drivingly connected to the volute (6) via a clutch mechanism; Wherein, in the first state, the driving mechanism drives the centrifugal fan blades (5) to rotate by driving the rotating shaft (14), and the rotating shaft (14) also drives the clutch mechanism to disconnect, so that the volute (6) can remain stationary; in the second state, the driving mechanism drives the rotating shaft (14) to rotate, so that the rotating shaft (14) drives the clutch mechanism to conduct, thereby driving the volute (6) to rotate.

3. The fan structure according to claim 2, characterized in that: The driving mechanism is used to drive the rotating shaft (14) to rotate forward or reverse; Wherein, in the first state, the rotating shaft (14) drives the centrifugal fan blades (5) to rotate and drives the clutch mechanism to disconnect by forward rotation; in the second state, the rotating shaft (14) drives the clutch mechanism to connect by reverse rotation.

4. The fan structure according to claim 3, characterized in that: The clutch mechanism comprises a ratchet (8), a transmission member (15) and a first elastic member (17); the transmission member (15) is movably arranged on the volute (6); The clutch mechanism is connected to the rotating shaft (14) through the ratchet (8), and the rotating shaft (14) is used to drive the ratchet (8) to rotate; in the first state, the rotating shaft (14) drives the ratchet (8) to rotate along a set direction (a), and the gear teeth (81) of the ratchet (8) push the transmission member (15) to move, so that the transmission member (15) makes way for the rotation path of the ratchet (8) to disconnect the clutch mechanism; in the second state, the rotating shaft (14) drives the ratchet (8) to rotate in a direction opposite to the set direction (a), and the first elastic member (17) drives the transmission member (15) to move to the rotation path of the gear teeth (81) of the ratchet (8), so that the gear teeth (81) of the ratchet (8) can abut against the transmission member (15), and drive the volute (6) to rotate through the transmission member (15), so as to conduct the clutch mechanism.

5. The fan structure according to claim 4, characterized in that: The transmission member (15) is arranged on the volute (6) in a rotationally connected manner, and the transmission member (15) has a first end (151) and a second end (150) that are opposite to each other; in the first state, the gear teeth (81) of the ratchet wheel (8) drive the transmission member (15) to move by pushing the side surface (153) of the second end; in the second state, the transmission member (15) abuts against the gear teeth (81) through the end surface (152) of the second end, and the transmission member (15) drives the volute (6) to rotate through the first end (151).

6. The fan structure according to claim 5, characterized in that: The middle portion of the transmission member (15) between the first end (151) and the second end (150) is rotatably connected to the volute (6) via a rotating shaft (16); And / or, the transmission member (15) is an elastic block, and the first end (151) is fixed on the volute (6).

7. The fan structure according to any one of claims 1 to 6, characterized in that: Also includes a locking mechanism; The locking mechanism locks the volute (6) in the first state so that the volute (6) remains stationary; and the locking mechanism unlocks the volute (6) in the second state so that the volute (6) can be driven by the driving mechanism to rotate.

8. The fan structure according to claim 7, characterized in that: The centrifugal fan blade (5) rotates along a first direction (c) in the first state, and the volute (6) rotates along a second direction (b) in the second state, and the first direction (c) is opposite to the second direction (b); The locking mechanism comprises a clamping block (13), a clamping portion (19) and a second elastic member (20); one of the clamping block (13) and the clamping portion (19) is arranged on the volute (6), and the clamping block (13) is movable; The second elastic member (20) is used to push the clamping block (13) to move to the clamping position, so that the clamping block (13) can be clamped with the clamping portion (19) when the volute (6) rotates in the first direction (c), so as to lock the volute (6); and the volute (6) can drive the clamping block (13) to withdraw from the clamping portion (19) when the volute (6) rotates in the second direction (b), so as to unlock the volute (6).

9. The fan structure according to claim 8, characterized in that: The clamping block (13) is located on the volute (6), and the clamping block (13) has a first a-end (131) and a second a-end (132) opposite to each other. The clamping block (13) is rotatably connected to the volute (6) via the first a-end (131); the second elastic member (20) is arranged between the clamping block (13) and the volute (6); the second a-end (132) is opened relative to the volute (6) when in the clamping position, and cooperates with the volute (6) to form a clamping slot (130) therebetween; wherein the clamping block (13) is inserted into the clamping portion (19) via the clamping slot (130) so as to be clamped with the clamping portion (19).

10. The fan structure according to claim 9, characterized in that: The first air outlet channel (2) has a first air inlet end (23), and the first air inlet end is fixed on the radial outer side of the volute (6); when in the first position, the first air outlet channel (2) is connected to the air outlet (601) through the first air inlet end (23); wherein when the volute (6) rotates in the second direction (b) and drives the block (13) to pass through the first air inlet end (23), it can be pushed by the first air inlet end (23) to close; And / or, the second air outlet channel (3) has a second air inlet end (32), and the second air inlet end (32) is fixed on the radial outer side of the volute (6); when in the second position, the second air outlet channel (3) is connected to the air outlet (601) through the second air inlet end (32); wherein, when the volute (6) rotates in the second direction (b) and drives the blocking block (13) to pass through the second air inlet end (32), it can be pushed by the second air inlet end (32) to close.

11. The fan structure according to any one of claims 8 to 10, characterized in that: The clamping portion (19) comprises a first clamping portion (191) arranged on the first air outlet channel (2) and a second clamping portion (192) arranged on the second air outlet channel (3); The clamping block (13) is used to clamp with the first clamping portion (191) when the volute (6) rotates to the first position, and to clamp with the second clamping portion (192) when the volute (6) rotates to the second position.

12. The fan structure according to any one of claims 1-6 and 8-10, characterized in that: An air inlet (102) is provided on the axial side of the volute (6), and air is taken in through the air inlet (102) when the centrifugal fan blades (5) rotate.

13. The fan structure according to claim 12, characterized in that: The first air outlet channel (2) has a first air inlet end (23), the second air outlet channel (3) has a second air inlet end (32), and the volute is provided with a avoidance groove (602); Wherein, when in the first position, the air outlet (601) is opposite to the first air inlet end (23), so that the air outlet (601) is connected to the first air outlet channel (2) through the first air inlet end (23); and the avoidance groove (602) is opposite to the second air inlet end (32) when in the first position, so that the second air inlet end (32) can be connected to the air inlet (102); and / or, when in the second position, the air outlet (601) is opposite to the second air inlet end (32), so that the air outlet (601) is connected to the second air outlet channel (3) through the second air inlet end (32); and the avoidance groove (602) is opposite to the first air inlet end (23) when in the second position, so that the second air inlet end (32) can be connected to the air inlet (102).

14. The fan structure according to claim 12, characterized in that: It also comprises a fixed shell (4), the volute (6) being rotatably arranged in the fixed shell (4), and a gap being provided between the air inlet (102) and a side wall of the fixed shell (4); the fixed shell (4) having a first side and a second side, the first air outlet channel (2) being installed on the first side, and the second air outlet channel (3) being installed on the second side; the first side being provided with a first through hole (401), and the second side being provided with a second through hole (402); Wherein, a sealing structure is provided on the fixed shell (4), and the volute (6) is used to seal with the sealing structure when it is rotated to the first position, so as to block the communication between the first through hole (401) and the air inlet (102), and enable the air inlet (102) to communicate with the second through hole (402); the volute (6) is used to seal with the sealing structure when it is rotated to the second position, so as to block the communication between the second through hole (402) and the air inlet (102), and enable the air inlet (102) to communicate with the first through hole (401).

15. The fan structure according to claim 14, characterized in that: The sealing structure comprises a sealing strip (7) arranged on the inner wall of the fixed shell (4); wherein, when the volute (6) rotates to the first position or the second position, the sealing structure is sealed with the outer wall of the volute (6) through the sealing strip (7).

16. A household appliance, characterized in that: The invention comprises the fan structure according to any one of claims 1 to 15.

17. The household appliance according to claim 16, characterized in that: The household appliance is an air conditioner or a dehumidifier.

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