Fan structure and household appliance

Abstract

The utility model 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 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 utility model belongs to the technical field of fans, and particularly relates to a fan structure and a household appliance. Background Art

[0002] At present, the up-and-down air outlet air conditioner can achieve carpet-like heating and shower-like cooling, with good comfort and great development prospects. For the up-and-down air outlet air conditioner, the up-and-down air outlet needs to be switched through a corresponding switching mechanism so that the air conditioner blows air through different air outlet channels. Among them, the up-and-down air outlet air conditioner generally needs to be provided with a separate driving mechanism to provide power for the switching of the air outlet channels, which will increase the driving cost. Therefore, it is necessary to solve this problem. Summary of the Utility Model

[0003] Therefore, the utility model provides a fan structure and a household appliance, which can solve the technical problem that in the prior art, an additional driving mechanism needs to be provided to provide power for the switching of the air outlet channels, resulting in a relatively high driving cost.

[0004] To solve the above problems, the utility model provides a fan structure, which includes a volute, a centrifugal impeller, a first air outlet channel and a second air outlet channel; an air outlet is provided on the volute, and the centrifugal impeller is rotatably installed in the volute, and the centrifugal impeller is used for exhausting air through the air outlet when rotating;

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

[0006] Wherein, the fan structure has at least two states. In the first state, the driving mechanism drives the centrifugal impeller 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 the first position or the second position; wherein, in the first position, the air outlet is communicated with the first air outlet channel; in the second position, the air outlet is communicated with the second air outlet channel.

[0007] In some embodiments, the centrifugal impeller rotates through a rotating shaft, and the rotating shaft is drivingly connected to the volute through a clutch mechanism;

[0008] Wherein, in the first state, the driving mechanism drives the rotating shaft to rotate to drive the centrifugal impeller to rotate, and the rotating shaft also drives the clutch mechanism to disengage 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, so as to drive the volute to rotate.

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

[0010] Wherein, in the first state, the rotating shaft drives the centrifugal fan blade to rotate in the forward direction and drives the clutch mechanism to disengage; in the second state, the rotating shaft drives the clutch mechanism to engage through reverse rotation.

[0011] In some embodiments, the clutch mechanism includes a ratchet wheel, a transmission member, and a first elastic member, and the transmission member is movably arranged on the volute casing.

[0012] Wherein, the clutch mechanism is connected to the rotating shaft through the ratchet wheel, and the rotating shaft is used to drive the ratchet wheel to rotate; in the first state, the rotating shaft drives the ratchet wheel to rotate in a set direction, and the teeth of the ratchet wheel push the transmission member to move, so that the transmission member gives way to the rotation path of the ratchet wheel to disengage the clutch mechanism; in the second state, the rotating shaft drives the ratchet wheel 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 wheel, so that the teeth of the ratchet wheel can abut against the transmission member and drive the volute casing to rotate through the transmission member to engage the clutch mechanism.

[0013] In some embodiments, the transmission member is arranged on the volute casing in a rotatable connection manner, and the transmission member has opposite first and second ends; in the first state, the teeth of the ratchet wheel drive the transmission member to move by pushing the side surface of the second end; in the second state, the transmission member abuts against the teeth through the end surface of the second end, and the transmission member drives the volute casing to rotate through the first end.

[0014] In some embodiments, the middle part of the transmission member between the first end and the second end is rotatably connected to the volute casing through a rotating shaft.

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

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

[0017] The locking mechanism locks the volute casing in the first state to keep the volute casing stationary; and the locking mechanism unlocks the volute casing in the second state to enable the volute casing to 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 casing rotates in a second direction in the second state, and the first direction is opposite to the second direction.

[0019] The locking mechanism includes a latch, a latching portion, and a second elastic member. One of the latch and the latching portion is disposed on the volute casing, and the latch is movable.

[0020] Wherein, the second elastic member is configured to push the latch to move to the latching position, so that the latch can be latched with the latching portion when the volute casing rotates in the first direction to lock the volute casing; when the volute casing rotates in the second direction, it can drive the latch to withdraw from the latching portion to unlock the volute casing.

[0021] In some embodiments, the latch is located on the volute casing. The latch has opposite first end a and second end a. The latch is rotatably connected to the volute casing through the first end a; the second elastic member is disposed between the latch and the volute casing; the second end a is open relative to the volute casing at the latching position and cooperates with the volute casing to form a bayonet therebetween; wherein, the latch allows the latching portion to be inserted through the bayonet to be latched with the latching 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 casing; at the first position, the first air outlet channel is communicated with the air outlet through the first air inlet end; wherein, when the volute casing rotates in the second direction and drives the latch to pass by the first air inlet end, it can be pushed by the first air inlet end to close.

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

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

[0025] Wherein, the latch is configured to be latched with the first latching portion when the volute casing rotates to the first position, and to be latched with the second latching portion when the volute casing rotates to the second position.

[0026] In some embodiments, an air inlet is provided on the axial side of the volute casing, and the centrifugal air impeller intakes air through the air inlet when rotating.

[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 an avoidance groove is provided on the volute casing.

[0028] Wherein, when in the first position, the air outlet is opposite to the first air inlet end, so that the air outlet is communicated with 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 communicated with 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 communicated with 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 communicated with the air inlet.

[0029] In some embodiments, the fan structure further includes a fixed housing, the volute is rotatably arranged in the fixed housing, and there is a gap between the air inlet and the side wall of the fixed housing; the fixed housing 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; a first through hole is provided on the first side, and a second through hole is provided on the second side;

[0030] Wherein, a sealing structure is provided on the fixed housing, and the volute is used for sealingly cooperating with the sealing structure when rotating to the first position to block the communication between the first through hole and the air inlet, and to communicate the air inlet with the second through hole; the volute is used for sealingly cooperating with the sealing structure when rotating to the second position to block the communication between the second through hole and the air inlet, and to communicate the air inlet with the first through hole.

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

[0032] The present utility model also provides a household appliance, which includes the fan structure according to any one of the above.

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

[0034] The fan structure and the household appliance provided by the present utility model have the following beneficial effects:

[0035] 1. The drive mechanism of the present utility model has a dual function. It can not only drive the centrifugal impeller to rotate to realize the normal air outlet function of the fan structure of the present utility model, but also drive the volute to rotate to realize the switching of the air outlet channel. Compared with the prior art where a separate drive mechanism is required to provide power for the switching of the air outlet channel, the present utility model utilizes the drive mechanism of the centrifugal impeller to drive the switching of the air outlet channel, thus saving at least one set of drive mechanisms and reducing the drive cost.

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

[0037] 3. The fan mechanism of the present utility model can achieve unidirectional air outlet through the first air outlet channel or the second air outlet channel. When achieving unidirectional air outlet, air can enter through the other air outlet channel, accelerating the indoor air circulation while improving the utilization rate of energy in the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0039] Figure 1 is an exploded view of an air conditioner provided by an embodiment of the present utility model;

[0040] Figure 2 is an exploded view of a fan structure provided by an embodiment of the present utility model;

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

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

[0043] Figure 5 is a schematic diagram showing the air outlet of the volute communicating with the first air outlet channel;

[0044] Figure 6 is Figure 5 an enlarged schematic view of part A in

[0045] Figure 7 is a schematic diagram showing the air outlet of the volute communicating with the second air outlet channel;

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

[0047] The reference numerals are 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 housing; 5, centrifugal fan blade; 6, volute; 7, sealing strip; 8, ratchet; 9, bearing; 10, rubber cap; 12, motor; 13, latch; 14, rotating shaft; 15, transmission member; 16, rotating shaft; 17, first elastic member; 18, ratchet box; 19, clamping portion; 20, second elastic member; 21, groove; 22, baffle; 23, first air inlet end; 32, second air inlet end; 41, rear housing; 42, front housing; 61, volute main body; 62, volute cover; 81, tooth; 101, air inlet hole; 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 portion; 192, second clamping portion; 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 implementation manners

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

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

[0052] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is merely for the convenience of differentiating the corresponding components. Without additional statement, the above terms have no special meaning, and thus should not be construed as limiting the protection scope of the present utility model.

[0053] Referring to Figure 1-8 As shown, according to an embodiment of the present utility model, a fan structure is provided, which includes a volute 6, a centrifugal impeller 5, a first air outlet channel 2 and a second air outlet channel 3. An air outlet 601 is provided on the volute 6, and the centrifugal impeller 5 is rotatably installed in the volute 6. The centrifugal impeller 5 is used for exhausting air through the air outlet 601 when rotating. It should be noted here that: the air outlet 601 is generally located radially outside the centrifugal impeller 5.

[0054] The aforementioned volute 6 can be rotated to a first position and a second position. Among them, as Figure 5 shown, when the volute 6 is in the first position, the air outlet 601 on the volute 6 is communicated with the first air outlet channel 2, so that the air outlet 601 exhausts air through the first air outlet channel 2. As Figure 7 shown, when the volute 6 is in the second position, the air outlet 601 is communicated 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 communicated 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 communicated with the second air outlet channel 3.

[0055] The aforementioned centrifugal fan blade 5 and volute 6 are both driven by the same driving mechanism to rotate. 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 blade 5 to rotate, and the volute 6 remains stationary. At this time, the fan structure discharges air through the first air outlet passage 2 or the second air outlet passage 3 communicated with the air outlet 601 to realize the normal air discharge 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 rotated to the aforementioned first position or second position, so that the air outlet 601 is communicated with the first air outlet passage 2 or the second air outlet passage 3 to switch the air outlet passage of the fan structure.

[0056] In the above example, the driving mechanism of the present invention has a dual function. It can not only drive the centrifugal fan blade 5 to rotate to realize the normal air discharge function of the fan structure of the present invention, but also drive the volute 6 to rotate to realize the switching of the air outlet passage. Compared with the prior art that requires a separate driving mechanism to provide power for the switching of the air outlet passage, the present invention drives the switching of the air outlet passage by using the driving mechanism of the centrifugal fan blade 5, so that at least one set of driving mechanism can be saved and the driving cost can be reduced.

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

[0058] In some embodiments, such as Figure 2 and Figure 3 shown, the aforementioned driving mechanism includes a motor 12. The driving mechanism drives the centrifugal fan blade 5 and the volute 6 to rotate through the same motor 12. Among them, the motor 12 can sometimes also be called a fan.

[0059] In order to achieve the purpose that the aforementioned centrifugal fan blade 5 and volute 6 are both driven by the same driving mechanism to rotate, in some embodiments, such as Figure 3 shown, the aforementioned centrifugal fan blade 5 rotates through a rotating shaft 14. The centrifugal fan blade 5 can be sleeved and fixed on the rotating shaft 14. The rotating shaft 14 is drivingly connected to the volute 6 through 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 rotating shaft 14 to rotate to drive the centrifugal fan blade 5 to rotate, 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, so as to drive the volute 6 to rotate.

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

[0061] In some embodiments, the aforementioned driving mechanism is used to drive the rotating shaft 14 to rotate forward or backward. For example, the driving mechanism can drive the rotating shaft 14 to rotate forward or backward 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. The rotating shaft 14 drives the centrifugal impeller 5 to rotate forward and drives the clutch mechanism to disengage. 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 beneficial to keeping the volute 6 stationary. At this time, the rotating shaft 14 drives the centrifugal impeller 5 to rotate to realize the normal air outlet function of the fan structure.

[0063] When the fan structure is in the aforementioned second state, the driving mechanism drives the rotating shaft 14 to rotate backward. The rotating shaft 14 drives the clutch mechanism to conduct through reverse rotation. When the clutch mechanism conducts, the rotating shaft 14 drives the volute 6 to rotate to the aforementioned first position or second position to realize the switching of the air outlet channel.

[0064] In some embodiments, the aforementioned clutch mechanism can be a mechanical clutch mechanism that is driven by the rotating shaft 14 to disengage or conduct, so that the use of electronic components can be saved and the cost can be reduced.

[0065] In order to realize the function that the aforementioned clutch mechanism is driven by the rotating shaft 14 to disengage or conduct, in some embodiments, such as Figure 4As shown, the aforementioned clutch mechanism may include a ratchet wheel 8, a transmission member 15, and a first elastic member 17. The transmission member 15 is movably disposed on the volute 6. Among them, the clutch mechanism is connected to the rotating shaft 14 through the ratchet wheel 8. The rotating shaft 14 is used to drive the ratchet wheel 8 to rotate. In the first state, the rotating shaft 14 drives the ratchet wheel 8 to rotate in the set direction a, and the teeth 81 of the ratchet wheel 8 push the transmission member 15 to move, so that the transmission member 15 clears the rotation path of the ratchet wheel 8 to disconnect the clutch mechanism. In this first state, there is no transmission connection relationship between the ratchet wheel 8 and the transmission member 15. In the second state, the rotating shaft 14 drives the ratchet wheel 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 teeth 81 of the ratchet wheel 8, so that the teeth 81 of the ratchet wheel 8 can abut against the transmission member 15 and drive the volute 6 to rotate through the transmission member 15 to conduct the clutch mechanism. In this second state, the ratchet wheel 8 is in transmission connection with the volute 6 through the transmission member 15. It should be noted here that in the first state, the transmission member 15 is pushed by the teeth 81 of the ratchet wheel 8 to apply a force to the first elastic member 17, causing the first elastic member 17 to undergo elastic deformation. In the second state, the first elastic member 17 releases elastic force to drive the transmission member 15 to move to the rotation path of the teeth 81 of the ratchet wheel 8. Among them, the first elastic member 17 can be a spring or the like.

[0066] In the above example, the cooperation of the ratchet wheel 8, the transmission member 15, and the first elastic member 17 can realize the function that the aforementioned clutch mechanism is driven by the rotating shaft 14 to be disconnected or conducted.

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

[0068] In a specific application example, as Figure 4 shown, the aforementioned transmission member 15 can be disposed on the volute 6 in a rotatable connection manner. The transmission member 15 has opposite first end 151 and second end 150. In the aforementioned first state, the teeth 81 of the ratchet wheel 8 drive the transmission member 15 to move by pushing the side surface 153 of the second end, so that the transmission member 15 clears the rotation path of the ratchet wheel 8. In the second state, the transmission member 15 abuts against the 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 tooth 81 of the ratchet 8 presses against the end face 152 of the second end of the transmission member 15. 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 tooth 81 of the ratchet 8 drives the transmission member 15 to move out of the rotation path of the ratchet 8 by pushing the side face 153 of the second end. Among them, the lever structure has the advantages of labor saving and simple structure, which is convenient for implementation.

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

[0071] In some embodiments, the aforementioned transmission member 15 can be an elastic block, and the first end 151 of the transmission member 15 is fixed on the volute 6. For example, the first end 151 can be fixed on the volute 6 by glue or the like. Among them, since the transmission member 15 is an elastic block, the transmission member 15 can undergo elastic deformation, and even if the first end 151 of the transmission member is fixed on 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 on 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 beneficial to improving the rotation stability of the transmission member 15 driving the volute 6.

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

[0073] For easy understanding, the commutation process of the volute 6 will be described below. Among them, when the driving mechanism drives the centrifugal impeller 5 and the volute 6 to rotate through the motor 12, the volute 6 in the present invention completes commutation through the following steps:

[0074] 1. When the centrifugal impeller 5 is blowing air, as Figure 4 shown, the motor 12 rotates forward to drive the centrifugal impeller 5 to rotate counterclockwise, and the ratchet 8 rotates counterclockwise following the rotating shaft 14. When the ratchet 8 rotates counterclockwise, the arc-shaped tooth surface of the tooth 81 of the ratchet 8 pushes the transmission member 15 to compress the first elastic member 17. At this time, the rotation of the ratchet 8 is not affected by the transmission member 15;

[0075] 2. When the volute 6 needs to rotate and reverse, as Figure 4As shown, after the motor 12 decelerates to a stop and then reverses (clockwise rotation in this embodiment), the ratchet 8 rotates clockwise following the rotating shaft 14. When the ratchet 8 rotates clockwise, the straight tooth surface of the ratchet teeth 81 is blocked by the transmission member 15, and then the transmission member 15 transmits the force of the clockwise rotational movement 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 in-place position, the motor 12 stops rotating 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 to keep the volute 6 stationary. And the locking mechanism unlocks the volute 6 in the second state to enable the volute 6 to 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, it can ensure that the volute 6 remains stationary in the first state, which is beneficial to improving the stability of the centrifugal impeller 5 rotating to discharge air. Additionally, in the second state, the locking mechanism unlocks the volute 6, thus not affecting the air duct switching function of the fan structure in the second state.

[0079] To achieve the function of the aforementioned locking mechanism, in some embodiments, as Figure 5 and Figure 6 shown, the aforementioned centrifugal impeller 5 rotates in the first direction c in the first state, and the volute 6 rotates in 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 latch 13, a latching portion 19, and a second elastic member 20. One of the latch 13 and the latching portion 19 is provided on the volute 6, and the latch 13 is movable. Among them, the second elastic member 20 is used to push the latch 13 to move to the latching position, so that the latch 13 can be latched with the latching 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 latch 13 to withdraw from the latching portion 19 to unlock the volute 6.

[0080] In the above example, the centrifugal impeller 5 rotates in the first direction c in the first state to perform normal rotational air discharge. At this time, if the volute 6 is also affected by the centrifugal impeller 5 and rotates in the first direction c, it will only make the latch 13 and the latching portion 19 latch more tightly, thus fixing the volute 6 more firmly. In this way, it is beneficial to keep the volute 6 stationary in the first state. When the volute 6 rotates in the second direction b in the second state to switch the air duct, since the volute 6 can drive the latch 13 to withdraw from the latching portion 19 in the second direction b, the volute 6 can be smoothly unlocked, and it will not affect the rotation of the volute 6 in the second state.

[0081] In order to achieve the purpose of engaging the aforementioned clamping block 13 with the engaging portion 19, in some embodiments, such as Figure 5 and Figure 6 shown, the aforementioned clamping block 13 can be located on the volute 6. The clamping block 13 has opposite first a - ends 131 and second a - ends 132. The clamping block 13 is rotationally connected to the volute 6 through the first a - end 131. For example, the first a - end 131 can be rotationally connected to the volute 6 by being hinged to the volute 6. The aforementioned second elastic member 20 is disposed between the clamping block 13 and the volute 6. Preferably, the second elastic member 20 is disposed between the volute 6 and the second a - end 132 of the clamping block 13. The second a - end 132 of the clamping block 13 is open relative to the volute 6 at the aforementioned engaging position, and cooperates with the volute 6 to form a bayonet 130 therebetween. Wherein, the clamping block 13 allows the engaging portion 19 to be inserted through the bayonet 130 to engage with the engaging portion 19.

[0082] It should be noted here that: the volute 6 is provided with a limiting structure. When the clamping block 13 is in the engaging position, the limiting structure limits the clamping block 13, so that the second a - end 132 of the clamping block 13 is located at the extreme open position relative to the volute 6. At this time, the clamping block 13 cannot continue to open, so as to maintain the stability of the bayonet 130 and improve the stability of the engagement between the engaging portion 19 and the bayonet 130. Among them, the clamping block 13 can be limited by its own contour in cooperation with the volute 6 when in the engaging position.

[0083] In the above example, when the clamping block 13 opens, it cooperates with the volute 6 to form a bayonet 130 therebetween, and then the clamping block 13 allows the aforementioned engaging portion 19 to be inserted through the bayonet 130, so as to achieve the effect of engaging the clamping block 13 with the engaging portion 19.

[0084] In some embodiments, such as Figure 8 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 communicated with the air outlet 601 through the first air inlet end 23. Among them, when the volute 6 rotates in the second direction b and drives the clamping block 13 to pass through the first air inlet end 23, the volute 6 can be pushed by the first air inlet end 23 to close.

[0085] Similarly, as Figure 8 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 communicated with the air outlet 601 through the second air inlet end 32. Among them, when the volute 6 rotates in the second direction b and drives the clamping block 13 to pass through the second air inlet end 32, the volute 6 can be pushed by the second air inlet end 32 to close.

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

[0087] In some embodiments, as Figure 6 shown, a groove 21 may be provided on the aforementioned volute 6, 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, as Figure 5 and Figure 7 shown, the aforementioned clamping portion 19 may include a first clamping portion 191 provided on the first air outlet passage 2 and a second clamping portion 192 provided on the second air outlet passage 3. Wherein, the clamping block 13 is used to be clamped with the first clamping portion 191 when the volute 6 rotates to the first position (as Figure 5 shown), and is clamped with the second clamping portion 192 when the volute 6 rotates to the second position (as Figure 7 shown).

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

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

[0091] In some embodiments, an air inlet 102 is provided on the axial side of the aforementioned volute 6. When the centrifugal impeller 5 rotates, air enters through the air inlet 102. Among them, the centrifugal impeller 5 may be a double-suction centrifugal impeller. Correspondingly, the number of the air inlets 102 is two and they are distributed on both axial sides of the volute 6.

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

[0093] Wherein, when in the first position, the air outlet 601 faces the first air inlet end 23, so that the air outlet 601 communicates with the first air outlet passage 23 through the first air inlet end 23. And the avoidance groove 602 faces the second air inlet end 32 in this first position, so that the second air inlet end 32 can communicate with the air inlet 102. And / or, when in the second position, the air outlet 601 faces the second air inlet end 32, so that the air outlet 601 communicates with the second air outlet passage 3 through the second air inlet end 32; and the avoidance groove 602 faces the first air inlet end 23 in this second position, so that the second air inlet end 32 can communicate with the air inlet 102.

[0094] In the above example, since the second air inlet end 32 can communicate with the air inlet 102 when in the first position, the air inlet 102 can communicate with the second air outlet passage 3 through the second air inlet end 32. At this time, the second air outlet passage 3 serves as an air inlet passage. Similarly, since the first air inlet end 23 can communicate with the air inlet 102 when in the second position, the air inlet 102 can communicate with the first air outlet passage 2 through the first air inlet end 23. At this time, the first air outlet passage 2 serves as an air inlet passage. The purpose of such a design is as follows: In some embodiments, the first air outlet passage 2 can be an upper air duct, and the second air outlet passage 3 can be a lower air duct. During the refrigeration process, the air conditioner blows out cold air through the upper air outlet 201 of the first air outlet passage 2. The cold air sinks and accumulates the cold quantity at the lower part of the room. At this time, the air conditioner sucks the cold air at the lower part of the room through the second air outlet passage 3 and then blows it out from the upper air outlet 201, so as to efficiently utilize the energy in the room and reduce the load on the evaporator. During the heating process, the hot air blown out by the air conditioner through the lower air outlet 301 of the second air outlet passage 3 floats and accumulates the heat at the upper part of the room. At this time, the air conditioner sucks the hot air at the upper part of the room through the first air outlet passage 2 from the upper air inlet 201 and then blows it out from the lower air outlet 301, so as to efficiently utilize the energy in the room and reduce the load on the evaporator.

[0095] In some embodiments, such as Figure 1 and Figure 2 shown, the aforementioned fan structure may further include a fixed housing 4. The volute 6 is rotatably arranged in the fixed housing 4, and there is a gap between the air inlet 102 and the side wall of the fixed housing 4. The fixed housing 4 has a first side and a second side. The first air outlet passage 2 is installed on the first side, for example, fixed on the first side; the second air outlet passage 3 is installed on the second side, for example, 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, the fixed housing 4 is provided with a sealing structure. Such as Figure 5As shown, when the volute 6 rotates to the first position, it is in sealing cooperation with the sealing structure to block the communication between the first through hole 401 and the air inlet 102, and to connect the air inlet 102 with both the second through hole 402 and the air inlet end of the second air outlet passage 3. In this way, the leakage of the air in the second through hole 402 and the second air outlet passage 3 can be prevented, which is beneficial to making all the air in the second through hole 402 and the second air outlet passage 3 enter the air inlet 102. As Figure 7 shown, when the volute 6 rotates to the second position, it is in sealing cooperation with the sealing structure to block the communication 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 passage 2. In this way, the leakage of the air in the first through hole 401 and the first air outlet passage 2 can be prevented, which is beneficial to making all the air in the first through hole 401 and the first air outlet passage 2 enter the air inlet 102.

[0096] In some embodiments, as Figure 5 and Figure 7 shown, the aforementioned sealing structure may include a sealing strip 7 provided on the inner wall of the fixed housing 4. Wherein, when the volute 6 rotates to the aforementioned first position or second position, the sealing structure is in sealing cooperation with the outer wall of the volute 6 through the sealing strip 7.

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

[0098] Among them, the fan mechanism of the present invention can achieve unidirectional air outlet through the first air outlet passage 2 or the second air outlet passage 3, and when achieving unidirectional air outlet, air can enter through the other air outlet passage, accelerating the indoor air circulation while improving the utilization rate of the energy in the room. The fan mechanism of the present invention re - sucks the air at the top / bottom of the room into the air conditioner, making more effective use of the air energy utilization rate in the room, and solving the problem of low air energy utilization rate of traditional floor - standing rooms, thus resulting in high energy efficiency.

[0099] The present invention also provides a household appliance, which includes the fan structure described in any one of the above. Among them, due to the adoption of the above - mentioned fan structure in the household appliance, compared with the prior art where a separate driving mechanism is required to provide power for the switching of the air outlet passage, the present invention drives the switching of the air outlet passage by using the driving mechanism of the centrifugal impeller 5, thus at least one set of driving mechanism can be saved, reducing the driving cost.

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

[0101] Among them, when the above - mentioned household appliance is an air conditioner, the air conditioner can be an air conditioner cabinet, such as Figure 1 and Figure 2As shown, the air conditioner further includes a heat exchanger 3 and a housing. The aforementioned fixed housing 4 is disposed within the housing, which is provided with an air inlet 101. The heat exchanger 3 is disposed within the housing, opposite the air inlet 101. The heat exchanger 3 can be positioned at the upper and lower ends of the fan structure. This air conditioner allows for switching between upper and lower airflow and more efficiently utilizes room air energy.

[0102] like Figure 1 and Figure 2 As shown, the aforementioned housing includes an air inlet panel 1c, a decorative panel 1a, and a top cover 1b, with the aforementioned air inlet hole 101 being provided 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, second air outlet channel 3, and fixed housing 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 upper and lower parts, respectively, which are placed diagonally above and diagonally below the air duct component. An air inlet hole 101 is provided at the upper and lower ends of the air inlet panel 1c, respectively, at positions corresponding to the heat exchanger 3.

[0103] like Figure 2 As shown, the aforementioned fixed shell 4 is formed by fastening the front shell 42 and the rear shell 41. The aforementioned volute 6 is formed by fastening the volute body 61 and the volute cover 62. The front shell 42 and the rear shell 41 constitute the fixed shell 4. 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 called a fan. The body of the motor 12 is directly fixed to the rear shell 41 of the fixed shell 4. 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. The rotating shaft 14 needs to be designed to be longer. In order to prevent the rotating shaft 14 from being too long and resulting in poor overall rigidity, the centrifugal fan blades 5 will jump up and down with a large amplitude when rotating, posing a risk of collision. In this utility model, the end of the rotating shaft 14 away from the motor 12 is fixed to the front housing 42 of the fixed housing 4, so that the rotating shaft 14 has fulcrums on the front housing 42 and the rear housing 41. At the same time, a bearing 9 is provided at the fixed position between the rotating shaft 14 and the front housing 42 to ensure smooth rotation of the rotating shaft 14, and a rubber cap 10 is placed on the outside of the bearing 9 to provide shock absorption.

[0104] In some embodiments, as Figure 2As shown in the figure, 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 utility model can achieve upper air outlet through the upper air outlet channel and lower air outlet through the lower air outlet channel. The working states of the single upper and single lower air outlet modes of the fan structure of the present utility model combined with the refrigeration and heating modes of the air conditioner are as follows:

[0105] 1. Refrigeration mode

[0106] As Figure 5 shown in the figure, when the air conditioner is refrigerating, cold air is blown out from the top of the air conditioner through the first air outlet channel 2. Utilizing the principle that cold air has a large density and sinks after being blown out, "shower refrigeration" is achieved. While avoiding the discomfort caused by cold air blowing directly on people, the temperature in the room is adjusted. At this time, the air outlet 601 of the volute 6 inside the air conditioner rotates to the position where the opening faces upward, and the air outlet 601 is connected to the upper channel (i.e., the aforementioned first air outlet channel 2) to achieve single upper air outlet. At this time, a total of two airflows are sucked into the volute 6: 1. The air at the rear side of the air conditioner is heat-exchanged by the heat exchanger 3 and then sucked into the air inlet of the volute 6 through the second through-hole 402 on the lower sides of the front housing 42 and the rear housing 41; 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 refrigeration process, cold air is blown out from the upper air outlet 201 at the top of the air conditioner, and the cold air sinks and accumulates the cold quantity 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 utility model, the air conditioner can suck the cold air in the lower part of the room from the air outlet and blow it out from the upper air outlet 201, efficiently utilizing the energy in the room and reducing the load on the evaporator. Therefore, the heat exchange area of the heat exchanger 3 can be reduced. When there is single upper air outlet, the upper half of the heat exchanger 3 is closed, and the lower half of the heat exchanger 3 works. Since the upper half of the heat exchanger 3 does not work, in order to prevent the unheated normal-temperature air from being sucked into the air duct, a baffle 22 is provided on the volute 6 to isolate the air in the upper half of the volute 6. A sealing structure such as a sealing strip 7 is provided on the inner sides of both the front housing 42 and the rear housing 41 of the fixed housing 4, and this sealing structure cooperates with the baffle on the volute 6 to play a sealing role.

[0108] 2. Heating mode

[0109] As Figure 7As shown in the figure, when the air conditioner is in the heating mode, hot air is blown out from the lower air outlet 301 of the air conditioner. Utilizing the principle that hot air has a small density and floats upward after being blown out, "carpet heating" is achieved. The hot air blows directly at people, improving the heating comfort. At this time, the air outlet 601 of the volute 6 inside the air conditioner rotates to the position where the opening faces downward, and the air outlet 601 communicates with the lower channel (i.e., the aforementioned second air outlet channel 3), realizing single lower air outlet. The lower part of the heat exchanger 3 is closed, and the upper part of the heat exchanger 3 operates. Similarly, there are two airflows sucked into the volute 6: 1. The airflow passing through the heat exchanger 3 enters from the first through holes 401 on the upper sides of the front housing 42 and the rear housing 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 from 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 into the air conditioner from the upper air outlet 201 and then blowing it out from the lower air outlet 301, the energy in the room is utilized efficiently.

[0111] Since both the first air outlet channel 2 and the second air outlet channel 3 are cold chambers in the cooling mode, if a motor driving mechanism is set in the air duct, motor heat preservation measures need to be added to avoid the motor from getting water, which will lead to a complex movement structure and low assembly efficiency. And because the volute 6 is large in volume and heavy in weight, a motor with a large torque is required to drive its rotation. 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 utility model, the volute 6 adopts the form of being directly driven by the motor 12 of the centrifugal impeller 5, thus reducing the use of the motor and effectively utilizing the large torque of the motor 12 of the centrifugal impeller. It should be noted here that the motor 12 of the centrifugal impeller can sometimes also be called a blower.

[0112] It is easy for those skilled in the art to understand that, on the premise of no conflict, the advantageous technical features of the above various methods can be freely combined and superimposed.

[0113] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model. The above is only the preferred implementation manner of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as within the protection scope of the present utility model.

Claims

1. A fan structure, characterized in that: It includes a volute (6), a centrifugal impeller (5), a first air outlet channel (2) and a second air outlet channel (3); an air outlet (601) is provided on the volute (6), the centrifugal impeller (5) is rotatably installed in the volute (6), and the centrifugal impeller (5) is used for exhausting air through the air outlet (601) when rotating. The volute (6) is also rotatable, and both the centrifugal impeller (5) and the volute (6) are used to be 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 impeller (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; wherein, in the first position, the air outlet (601) is communicated with the first air outlet channel (2); in the second position, the air outlet (601) is communicated with the second air outlet channel (3).

2. The fan structure according to claim 1, characterized in that: The centrifugal impeller (5) rotates through a rotating shaft (14), and the rotating shaft (14) is drivingly connected to the volute (6) through a clutch mechanism. Wherein, in the first state, the driving mechanism drives the centrifugal impeller (5) to rotate by driving the rotating shaft (14) to rotate, and the rotating shaft (14) also drives the clutch mechanism to disengage, 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, so as to drive the volute (6) to rotate.

3. The fan structure according to claim 2, wherein: The driving mechanism is used to drive the rotating shaft (14) to rotate forward or backward. Wherein, in the first state, the rotating shaft (14) drives the centrifugal impeller (5) to rotate and drives the clutch mechanism to disengage by rotating forward; in the second state, the rotating shaft (14) drives the clutch mechanism to conduct by rotating backward.

4. The blower structure according to claim 3, wherein: The clutch mechanism includes a ratchet (8), a transmission member (15) and a first elastic member (17), and the transmission member (15) is movably arranged on the volute (6). Wherein, 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 teeth (81) of the ratchet (8) push the transmission member (15) to move, so that the transmission member (15) gives way to the rotation path of the ratchet (8) to disengage 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 teeth (81) of the ratchet (8), so that the 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) to conduct the clutch mechanism.

5. The blower structure according to claim 4, wherein: The transmission member (15) is arranged on the volute (6) in a rotatable connection manner, and the transmission member (15) has opposite first end (151) and second end (150); in the first state, the 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 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 blower structure according to claim 5, wherein: The middle part of the transmission member (15) between the first end (151) and the second end (150) is rotatably connected to the volute (6) through 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 1-6, characterized in that: A locking mechanism is further included; 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 blower structure according to claim 7, wherein: The centrifugal impeller (5) rotates in the first direction (c) in the first state, and the volute (6) rotates in the second direction (b) in the second state, and the first direction (c) is opposite to the second direction (b); The locking mechanism includes 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; Wherein, 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) to lock the volute (6); when the volute (6) rotates in the second direction (b), it can drive the clamping block (13) to withdraw from the clamping portion (19) to unlock the volute (6).

9. The blower structure according to claim 8, wherein: The clamping block (13) is located on the volute (6). The clamping block (13) has opposite first a - ends (131) and second a - ends (132). The clamping block (13) is rotatably connected to the volute (6) through 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) at the clamping position and cooperates with the volute (6) to form a clamping opening (130) therebetween; wherein, the clamping block (13) allows the clamping portion (19) to be inserted through the clamping opening (130) to perform clamping connection with the clamping portion (19).

10. The fan structure according to claim 9, wherein: 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); at the first position, the first air outlet channel (2) is communicated with 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 clamping block (13) to pass by the first air inlet end (23), the volute (6) can be pushed by the first air inlet end (23) to be closed; 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); at the second position, the second air outlet channel (3) is communicated with 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 clamping block (13) to pass by the second air inlet end (32), the volute (6) can be pushed by the second air inlet end (32) to be closed.

11. The fan structure according to any one of claims 8 - 10, wherein: The clamping portion (19) includes 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); wherein, the clamping block (13) is used for clamping connection with the first clamping portion (191) when the volute (6) rotates to the first position, and clamping connection 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, 8 - 10, wherein: An air inlet (102) is arranged on the axial side of the volute (6), and the centrifugal impeller (5) intakes air through the air inlet (102) when rotating.

13. The blower structure according to claim 12, wherein: 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 an avoidance groove (602) is arranged on the volute. Wherein, when in the first position, the air outlet (601) faces the first air inlet end (23), so that the air outlet (601) communicates with the first air outlet passage (2) through the first air inlet end (23); and the avoidance groove (602) faces the second air inlet end (32) when in the first position, so that the second air inlet end (32) can communicate with the air inlet (102); and / or, when in the second position, the air outlet (601) faces the second air inlet end (32), so that the air outlet (601) communicates with the second air outlet passage (3) through the second air inlet end (32); and the avoidance groove (602) faces the first air inlet end (23) when in the second position, so that the second air inlet end (32) can communicate with the air inlet (102).

14. The fan structure according to claim 12, characterized in that: It further includes a fixed housing (4), the volute (6) is rotatably arranged in the fixed housing (4), and there is a gap between the air inlet (102) and the side wall of the fixed housing (4); the fixed housing (4) has a first side and a second side, the first air outlet passage (2) is installed on the first side, and the second air outlet passage (3) is installed on the second side; a first through hole (401) is provided on the first side, and a second through hole (402) is provided on the second side; Wherein, a sealing structure is provided on the fixed housing (4), and the volute (6) is used to be in sealing cooperation with the sealing structure when rotating to the first position to block the communication between the first through hole (401) and the air inlet (102), and to make the air inlet (102) communicate with the second through hole (402); the volute (6) is used to be in sealing cooperation with the sealing structure when rotating to the second position to block the communication between the second through hole (402) and the air inlet (102), and to make the air inlet (102) communicate with the first through hole (401).

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

16. A household appliance, characterized in that: It includes the blower structure according to any one of claims 1-15.

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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