Air duct mechanism and cabinet type air conditioner

Abstract

The utility model provides an air duct mechanism and a cabinet type air conditioner, the air duct mechanism comprises a volute, a volute cover and a sliding volute tongue, a centrifugal fan blade cavity is formed between the volute and the volute cover, and the centrifugal fan blade cavity comprises a first fan blade cavity peripheral wall, a fan blade cavity air outlet and a second fan blade cavity peripheral wall; a fixed volute tongue is arranged between the peripheral wall of the first fan blade cavity and the fan blade cavity air outlet; the sliding volute tongue is arranged between the volute and the volute cover and forms a volute tongue sliding part; a sliding rail is arranged between the volute and the volute cover and used for being matched with the volute tongue sliding part. When the volute tongue sliding part is located at one end of the sliding rail, the sliding volute tongue opens the fan blade cavity air outlet, and the first fan blade cavity peripheral wall, the fixed volute tongue and the other part of the sliding volute tongue are sequentially arranged and form a continuous molded line. When the volute tongue sliding part is located at the other end of the sliding rail, the sliding volute tongue closes the fan blade cavity air outlet, and the first fan blade cavity peripheral wall, the fixed volute tongue, the sliding volute tongue and the second fan blade cavity peripheral wall are sequentially arranged and form a continuous molded line; no vortex is generated, and the air supply loss is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of air treatment, and in particular relates to an air duct mechanism and a cabinet air conditioner. Background Art

[0002] In existing ventilation equipment, a blade cavity and an air supply duct are formed inside the volute, and the blade cavity and multiple air supply ducts are connected through the corresponding blade cavity air outlets; a baffle is set at each blade cavity air outlet, and according to the needs of air supply, the movement of the baffle is controlled to open or close the corresponding blade cavity air outlet to achieve air outlet in different directions; but when the baffle opens the blade cavity air outlet, the baffle does not fit with the surrounding wall of the blade cavity, and has a certain resistance to the air, resulting in a reduction in the air supply volume; when the baffle closes the blade cavity air outlet, the connection between the baffle and the surrounding wall of the blade cavity is not smooth, and vortexes are generated when air flows through, resulting in a reduction in the air supply volume; in addition, the baffle is prone to collide with the side wall of the blade cavity during movement. Utility Model Content

[0003] In view of this, the utility model provides an air duct mechanism and a cabinet air conditioner to solve the problems in the prior art that when the baffle opens the air outlet of the fan blade cavity, the baffle does not fit the peripheral wall of the fan blade cavity, the resistance is large when the air flows through, resulting in a reduction in the air supply volume; when the baffle closes the air outlet of the fan blade cavity, the connection between the baffle and the peripheral wall of the fan blade cavity is not smooth, vortexes are generated when air flows through, resulting in a reduction in the air supply volume; and the baffle is prone to collide with the side wall of the fan blade cavity during movement.

[0004] The utility model provides an air duct mechanism, comprising a volute and a volute cover, wherein the volute and the volute cover are buckled together to form a centrifugal fan chamber, wherein the centrifugal fan chamber comprises a first fan chamber peripheral wall, a fan chamber air outlet, and a second fan chamber peripheral wall sequentially arranged along the circumference of the centrifugal fan chamber; a fixed volute tongue is provided between the first fan chamber peripheral wall and the fan chamber air outlet;

[0005] The air duct mechanism further includes a sliding volute tongue for opening and closing the air outlet of the fan blade chamber, wherein the sliding volute tongue is slidably arranged between the volute casing and the volute cover, and the sliding volute tongue is formed with a volute tongue sliding portion;

[0006] A slide rail is provided between the volute and the volute cover, and is used to cooperate with the volute tongue sliding portion and guide the sliding volute tongue to slide between the directions of opening and closing the air outlet of the fan chamber; from one end of the slide rail to the other end, the distance between the point on the center line of the slide rail and the axis of the centrifugal fan chamber first increases and then decreases;

[0007] When the volute tongue sliding portion is at one end of the slide rail, the sliding volute tongue can open the air outlet of the fan chamber, a portion of the sliding volute tongue is located radially outside the fixed volute tongue, and the first fan chamber peripheral wall, the fixed volute tongue and another portion of the sliding volute tongue are sequentially arranged to form a continuous profile line;

[0008] When the volute tongue sliding portion is at the other end of the slide rail, the sliding volute tongue can close the air outlet of the fan chamber, and the first fan chamber peripheral wall, the fixed volute tongue, the sliding volute tongue and the second fan chamber peripheral wall are arranged in sequence and form a continuous profile line;

[0009] When the volute tongue sliding portion is located between one end and the other end of the slide rail, the sliding volute tongue and the fixed volute tongue are not in contact.

[0010] Further optionally, the slide rail is a segmented structure, comprising a first slide rail segment, a second slide rail segment, and a third slide rail segment sequentially arranged around the axis of the centrifugal fan blade cavity, the first slide rail segment and the third slide rail segment are both located radially inward of the second slide rail segment, and the first slide rail segment and the third slide rail segment both extend in a direction away from each other;

[0011] When the volute tongue sliding portion is at the end of the first slide rail section away from the second slide rail section, the air outlet of the fan blade chamber is in an open state;

[0012] When the volute tongue sliding portion is located at an end of the third slide rail segment away from the second slide rail segment, the air outlet of the fan blade chamber is in a closed state.

[0013] Further optionally, the first slide rail segment and the third slide rail segment are both linear structures; the second slide rail segment is an arc-shaped structure, and the second slide rail segment, the first fan blade cavity peripheral wall and the second fan blade cavity peripheral wall have the same profile structure.

[0014] Further optionally, the slide rail includes an A slide rail, a B slide rail, a C slide rail, and a D slide rail sequentially arranged around the air outlet of the fan chamber, the A slide rail and the D slide rail are spaced apart and arranged on a side close to the volute, and the B slide rail and the C slide rail are spaced apart and arranged on a side close to the volute cover;

[0015] There are four volute tongue sliding parts, which are sliding part a, sliding part b, sliding part c and sliding part d; sliding part a and sliding part d are arranged at intervals on the side of the sliding volute tongue close to the volute casing, and sliding part b and sliding part c are arranged at intervals on the side of the sliding volute tongue close to the volute cover;

[0016] The a sliding part cooperates with the A slide rail, the b sliding part cooperates with the B slide rail, the c sliding part cooperates with the C slide rail, and the d sliding part cooperates with the D slide rail.

[0017] Further optionally, in the A and B slide rails, the connection point of the second slide rail segment and the third slide rail segment is point M, the line passing through point M and tangent to the extension direction of the second slide rail segment is the tangent m, and the angle between the tangent m and the extension direction of the third slide rail segment is α, satisfying: 30°≤α≤60°; preferably, α=45°.

[0018] Further optionally, when the sliding volute tongue fully opens the air outlet of the fan blade chamber, the sliding portion a cooperates with the first slide rail segment of the slide rail A, the sliding portion b cooperates with the first slide rail segment of the slide rail B, the sliding portion c cooperates with the first slide rail segment of the slide rail C, and the sliding portion d cooperates with the first slide rail segment of the slide rail D;

[0019] When the sliding volute tongue partially opens the air outlet of the fan blade chamber, the sliding portion a cooperates with the second slide rail section of the A slide rail, the sliding portion b cooperates with the second slide rail section of the B slide rail, the sliding portion c cooperates with the second slide rail section of the C slide rail, and the sliding portion d cooperates with the second slide rail section of the D slide rail; the sliding volute tongue can rotate around the axis of the centrifugal fan blade chamber;

[0020] When the sliding volute tongue closes the air outlet of the fan blade chamber, the a sliding part cooperates with the third slide rail section of the A slide rail, the b sliding part cooperates with the third slide rail section of the B slide rail, the c sliding part cooperates with the third slide rail section of the C slide rail, and the d sliding part cooperates with the third slide rail section of the D slide rail.

[0021] Further optionally, the air duct mechanism includes a accommodating box, the accommodating box being arranged between the peripheral wall of the first fan blade chamber and the air outlet of the fan blade chamber; the fixed volute tongue is formed on the side wall of the accommodating box close to the axis of the centrifugal fan blade chamber, an accommodating cavity is formed inside the accommodating box, and a first box opening communicating with the accommodating cavity is formed on one side of the accommodating box close to the air outlet of the fan blade chamber; the sliding volute tongue is slidably arranged between the accommodating cavity and the air outlet of the fan blade chamber through the first box opening;

[0022] The centrifugal fan chamber further includes a fan chamber shaft wall provided at one end of the axis of the centrifugal fan chamber, and the accommodating box includes a first accommodating box shaft wall and a second accommodating box shaft wall provided opposite to each other, wherein the first accommodating box shaft wall is provided close to the fan chamber shaft wall, and the second accommodating box shaft wall is provided away from the fan chamber shaft wall;

[0023] The A slide rail is formed on the axis wall of the first accommodating box, the B slide rail and the C slide rail are formed on the axis wall of the second accommodating box, and the D slide rail is formed or provided on the axis wall of the fan blade cavity.

[0024] Further optionally, the accommodating box includes a accommodating box body and a accommodating cover body, the first box opening is formed at one end of the accommodating box body close to the air outlet of the fan chamber, the side wall of the accommodating box body close to the axial wall of the fan chamber is a first accommodating box axial wall, and the side wall of the accommodating box body away from the axial wall of the fan chamber is formed with a second box opening;

[0025] The accommodating cover is provided at the second box opening and the accommodating cover and the accommodating box form the accommodating cavity; the accommodating cover includes the second accommodating box axis wall;

[0026] The circumferential extension length of the accommodating box body is smaller than the circumferential extension length of the sliding volute tongue, and the circumferential extension length of the accommodating cover body is larger than the circumferential extension length of the sliding volute tongue.

[0027] Further optionally, the B slide rail is a groove structure, and the B slide rail passes through the shaft wall of the second accommodating box; the b sliding portion is an axis structure, and the b sliding portion is arranged in the B slide rail;

[0028] The air duct mechanism further includes a transmission assembly, which includes a gear, a rack, and a connecting rod; the gear and the rack are both arranged on a side of the shaft wall of the second storage box away from the storage box body, the gear and the rack are meshed, the gear can be controlled to rotate, and the rack can be controlled to slide, and the rack is made of a flexible material; one end of the connecting rod is hinged to the sliding portion b, and the other end of the connecting rod is hinged to the rack;

[0029] When the gear rotates, the rack can move with the connecting rod and the sliding volute.

[0030] Further optionally, the air duct mechanism further includes a sealing cover, which is arranged on a side of the accommodating cover away from the accommodating box body and an installation cavity is formed between the sealing cover and the accommodating cover; the transmission assembly is arranged in the installation cavity.

[0031] Further optionally, the air duct mechanism further comprises a sleeve, the sleeve comprising a sleeve body and a support portion, an axial hole being formed inside the sleeve body, the support portion being arranged at one axial end of the sleeve body, and the support portion being formed with a support curved surface;

[0032] The axial hole is used to penetrate the a sliding part and / or c sliding part and / or d sliding part, and the supporting curved surface is used to abut against the wall surface forming the A slide rail and / or the wall surface forming the C slide rail and / or the wall surface forming the D slide rail.

[0033] Further optionally, the support portion is a support bridge, the support bridge is an arc-shaped structure, and both ends of the support bridge are connected to one axial end of the sleeve body; the support curved surface is a spherical surface.

[0034] Further optionally, when the sliding volute tongue opens or closes the air outlet of the fan blade chamber, the distance between the point on the center line of the sliding volute tongue and the axis of the centrifugal fan blade chamber gradually increases from the air outlet of the fan blade chamber to the peripheral wall of the first fan blade chamber, and the distance between the point on the center line of the fixed volute tongue and the axis of the centrifugal fan blade chamber gradually increases.

[0035] Further optionally, a retaining rib is provided between the fixed volute tongue and the peripheral wall of the second blade cavity, and the blade cavity air outlet is formed between the retaining rib and the peripheral wall of the second blade cavity;

[0036] The sliding volute tongue includes a first volute tongue segment and a second volute tongue segment, and the second volute tongue segment is connected to the first volute tongue segment; an avoidance groove is formed on the side of the second volute tongue segment away from the axis of the centrifugal fan chamber, and the avoidance groove is used for the sliding volute tongue to avoid the retaining rib when sliding along the slide rail; when the air outlet of the fan chamber is in an open state, the first volute tongue segment is located radially outside the fixed volute tongue, and the second volute tongue segment is arranged close to the air outlet of the fan chamber.

[0037] Further optionally, the volute and the volute cover further form an air supply duct; the air supply duct includes an upper air supply duct, and the upper air supply duct is located above the centrifugal fan blade cavity; the fan blade cavity air outlet includes a fan blade cavity upper air outlet, and when the fan blade cavity upper air outlet is in an open state, the centrifugal fan blade cavity and the upper air supply duct are connected through the fan blade cavity upper air outlet; when the fan blade cavity upper air outlet is in a closed state, the centrifugal fan blade cavity and the upper air supply duct are not connected; and / or,

[0038] The air supply duct includes a lower air supply duct, which is located below the centrifugal fan blade cavity; the fan blade cavity air outlet includes a fan blade cavity lower air outlet, and when the fan blade cavity lower air outlet is in an open state, the centrifugal fan blade cavity and the lower air supply duct are connected through the fan blade cavity lower air outlet; when the fan blade cavity lower air outlet is in a closed state, the centrifugal fan blade cavity and the lower air supply duct are not connected.

[0039] The utility model also provides a cabinet air conditioner, comprising any of the above-mentioned air duct mechanisms.

[0040] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0041] The centrifugal fan chamber includes a first fan chamber peripheral wall, a fan chamber air outlet, and a second fan chamber peripheral wall, which are sequentially arranged. A fixed volute tongue is provided between the first fan chamber peripheral wall and the fan chamber air outlet. A sliding volute tongue is slidably provided between a volute and a volute cover, and the sliding volute tongue is formed with a volute tongue sliding portion. A slide rail is provided between the volute and the volute cover, and the slide rail is used to cooperate with the volute tongue sliding portion and guide the sliding volute tongue to slide between the directions of opening and closing the fan chamber air outlet.

[0042] When the volute tongue sliding portion is at one end of the slide rail, the sliding volute tongue can open the air outlet of the fan blade chamber. A portion of the sliding volute tongue is located radially outside the fixed volute tongue. The peripheral wall of the first fan blade chamber, the fixed volute tongue and another portion of the sliding volute tongue are sequentially arranged to form a continuous profile. The air in the centrifugal fan blade chamber can be discharged through the air outlet of the fan blade chamber, and the sliding volute tongue has little resistance to the air.

[0043] When the volute tongue sliding portion is at the other end of the slide rail, the sliding volute tongue can close the air outlet of the fan blade chamber. The peripheral wall of the first fan blade chamber, the fixed volute tongue, the sliding volute tongue and the peripheral wall of the second fan blade chamber are arranged in sequence and form a continuous profile line. The sliding volute tongue seals the air outlet of the fan blade chamber tightly, and the air in the centrifugal fan blade chamber can smoothly flow through the sliding volute tongue, thereby reducing the loss of air supply volume.

[0044] When the volute tongue sliding portion is between one end and the other end of the slide rail, the sliding volute tongue and the fixed volute tongue do not contact each other, thereby avoiding collision between the sliding volute tongue and the fixed volute tongue. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0046] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0047] Figure 1 This is a schematic diagram of the exploded structure of an embodiment of the air duct mechanism provided by the utility model;

[0048] Figure 2 This is a schematic diagram of the exploded structure of an embodiment of the sliding volute, the accommodating box, the transmission assembly, the sealing cover and the driving motor provided by the utility model;

[0049] Figure 3a This is a schematic structural diagram of an embodiment of the air duct mechanism provided by the utility model when the volute tongue sliding portion is at one end of the slide rail;

[0050] Figure 3bThis is a schematic structural diagram of an embodiment of the air duct mechanism provided by the utility model when the volute tongue sliding portion is at the other end of the slide rail;

[0051] Figure 4a 、 Figure 4b 、 Figure 4c and Figure 4d This is a schematic structural diagram of an embodiment of the air duct mechanism provided by the utility model when the volute tongue sliding portion is between one end and the other end of the slide rail;

[0052] Figure 5 A schematic structural diagram of an embodiment of a shaft sleeve provided by the utility model;

[0053] In the picture:

[0054] 1-volute assembly; 11-volute; 111-volute main wall; 112-volute opening; 12-volute cover; 13-centrifugal fan chamber; 131-first fan chamber peripheral wall; 132-second fan chamber peripheral wall; 133-fan chamber air outlet; 134-mounting position; 135-fan chamber shaft wall; 136-D slide rail; 137-fan chamber air inlet; 14-air supply duct; 141-upper air supply duct; 142-lower air supply duct; 15-retaining rib; 16-centrifugal fan;

[0055] 2 - accommodating box; 21 - accommodating box body; 211 - first accommodating box opening; 212 - second accommodating box opening; 213 - fixed volute; 214 - first accommodating box axis wall; 22 - accommodating cover; 221 - second accommodating box axis wall; 222 - rack slide; 23 - accommodating cavity; 241 - slide rail A; 242 - slide rail B; 243 - slide rail C; 251 - first slide rail segment; 252 - second slide rail segment; 253 - third slide rail segment;

[0056] 3-sliding volute tongue; 31-second volute tongue shaft wall; 311-b sliding portion; 312-c sliding portion; 321-first volute tongue segment; 322-second volute tongue segment; 33-avoidance groove;

[0057] 4- transmission assembly; 41- rack; 42- gear; 43- connecting rod;

[0058] 51-sealing cover; 52-sleeve; 521-sleeve body; 522-support portion; 523-support curved surface;

[0059] 6- Drive motor. DETAILED DESCRIPTION

[0060] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0061] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "A plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0062] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0063] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0064] In existing ventilation equipment, a blade cavity and an air supply duct are formed inside the volute, and the blade cavity and multiple air supply ducts are connected through corresponding blade cavity outlets; a baffle is provided at each blade cavity outlet, and the movement of the baffle is controlled to open or close the corresponding blade cavity outlet according to the need for air supply, so as to achieve air discharge in different directions; however, when the baffle opens the blade cavity outlet, the baffle does not fit the surrounding wall of the blade cavity, which has a certain resistance to the air, resulting in a reduction in the air supply volume; when the baffle closes the blade cavity outlet, the connection between the baffle and the surrounding wall of the blade cavity is not smooth, and vortexes are generated when air flows through, resulting in a reduction in the air supply volume; in addition, the baffle is prone to collide with the side wall of the blade cavity during movement;

[0065] The utility model creatively provides an air duct mechanism, including a volute and a volute cover, wherein the volute and the volute cover are buckled together to form a centrifugal fan chamber, wherein the centrifugal fan chamber includes a first fan chamber peripheral wall, a fan chamber air outlet, and a second fan chamber peripheral wall which are sequentially arranged; a fixed volute tongue is provided between the first fan chamber peripheral wall and the fan chamber air outlet; the air duct mechanism also includes a sliding volute tongue slidably provided between the volute and the volute cover, and the sliding volute tongue forms a volute tongue sliding portion; a slide rail is provided between the volute and the volute cover, and the slide rail is used to cooperate with the volute tongue sliding portion and guide the sliding volute tongue to slide;

[0066] When the volute tongue sliding portion is at one end of the slide rail, the sliding volute tongue can open the air outlet of the fan blade cavity, a part of the sliding volute tongue is located radially outside the fixed volute tongue, the first fan blade cavity peripheral wall, the fixed volute tongue and the other part of the sliding volute tongue are arranged in sequence and form a continuous profile; when the volute tongue sliding portion is at the other end of the slide rail, the sliding volute tongue can close the air outlet of the fan blade cavity, the first fan blade cavity peripheral wall, the fixed volute tongue, the sliding volute tongue and the second fan blade cavity peripheral wall are arranged in sequence and form a continuous profile; the air flow resistance in the centrifugal fan blade cavity is small, which reduces the loss of air supply volume.

[0067] like Figures 1 to 5 As shown, this embodiment provides an air duct mechanism, including a volute assembly 1, the volute assembly 1 includes a volute 11 and a volute cover 12, the volute 11 and the volute cover 12 are buckled together to form a centrifugal fan cavity 13, and a rotatable centrifugal fan 16 is provided in the centrifugal fan cavity 13; the centrifugal fan cavity 13 includes a first fan cavity peripheral wall 131, a fan cavity air outlet 133 and a second fan cavity peripheral wall 132 sequentially arranged along the circumference of the centrifugal fan cavity 13; the first fan cavity peripheral wall 131 and the fan cavity air outlet 133 are connected to the centrifugal fan cavity 13. A box installation position 134 is provided between the first and second blade chambers 133, and a fixed volute tongue 213 is provided at the box installation position 134; the fixed volute tongue 213, the first blade chamber peripheral wall 131, and the second blade chamber peripheral wall 132 have the same profile structure; specifically, the first blade chamber peripheral wall 131 and the second blade chamber peripheral wall 132 constitute the main structure of the centrifugal blade chamber 13; the fixed volute tongue 213 can be formed independently, or the fixed volute tongue 213 and the volute 11 can be formed as a whole, or the fixed volute tongue 213 and the volute cover 12 can be formed as a whole;

[0068] The air duct mechanism further includes a sliding volute tongue 3, which is slidably disposed between the volute 11 and the volute cover 12. The sliding volute tongue 3 has a first working position and a second working position. The sliding volute tongue 3 is used to open and close the air outlet 133 of the fan blade cavity. The sliding volute tongue 3 is formed with a volute tongue sliding portion.

[0069] A slide rail is provided between the volute 11 and the volute cover 12. The slide rail is used to cooperate with the volute tongue sliding portion and can guide the sliding volute tongue 3 to slide between the directions of opening and closing the air outlet 133 of the fan chamber. That is, the slide rail cooperates with the volute tongue sliding portion to guide and limit the sliding volute tongue 3. The sliding volute tongue 3 can slide along the slide rail to open or close the air outlet 133 of the fan chamber. The slide rail is a variable-pitch slide rail. From one end of the slide rail to the other end, the distance between the point on the center line of the slide rail and the axis of the centrifugal fan chamber 13 first increases and then decreases.

[0070] When the sliding volute tongue 3 is in the first working position, the volute tongue sliding portion is at one end of the slide rail, and the sliding volute tongue 3 can open the fan blade chamber air outlet 133. A portion of the sliding volute tongue 3 is located radially outside the fixed volute tongue 213. The first fan blade chamber peripheral wall 131, the fixed volute tongue 213 and the other portion of the sliding volute tongue 3 are sequentially arranged and form a continuous profile. The first fan blade chamber peripheral wall 131, the fixed volute tongue 213 and the other portion of the sliding volute tongue 3 transition smoothly in sequence. The air in the centrifugal fan blade chamber 13 can be discharged through the fan blade chamber air outlet 133. The sliding volute tongue 3 has little resistance to the air, thereby ensuring the air supply volume.

[0071] When the sliding volute tongue 3 is in the second working position, the volute tongue sliding portion is at the other end of the slide rail, and the sliding volute tongue 3 can close the air outlet 133 of the fan blade chamber. The first fan blade chamber peripheral wall 131, the fixed volute tongue 213, the sliding volute tongue 3 and the second fan blade chamber peripheral wall 132 are arranged in sequence and form a continuous profile line. The first fan blade chamber peripheral wall 131, the fixed volute tongue 213, the sliding volute tongue 3 and the second fan blade chamber peripheral wall 132 are smoothly transitioned in sequence without any gaps. The sliding volute tongue 3 seals the air outlet 133 of the fan blade chamber tightly, and the air in the centrifugal fan blade chamber 13 can flow smoothly through the sliding volute tongue 3 without generating eddy currents, thereby avoiding air leakage and reducing air supply loss.

[0072] When the volute tongue sliding portion is between one end and the other end of the slide rail, the sliding volute tongue 3 and the fixed volute tongue 213 do not contact and maintain a safe distance, thereby preventing the sliding volute tongue 3 and the fixed volute tongue 213 from colliding or scratching each other; the sliding volute tongue 3 can smoothly switch between the first working position and the second working position, and there is no interference between the sliding volute tongue 3 and other components except the slide rail, thereby ensuring the movement reliability of the sliding volute tongue 3;

[0073] The problem that the sliding volute tongue 3 needs to maintain a small gap with the first and second fan blade cavity peripheral walls 131 and 132 to prevent air leakage and the sliding volute tongue 3 needs to ensure a safe movement gap with other parts to avoid scratching is solved.

[0074] According to actual needs, the flow area of ​​the air outlet 133 of the fan chamber can also be adjusted by sliding the volute tongue 3 to achieve the optimal air supply volume, that is, the sliding of the volute tongue 3 is controlled so that when the relative positions of the sliding volute tongue 3 and the air outlet 133 of the fan chamber are different, the flow area of ​​the air outlet 133 of the fan chamber is different.

[0075] Furthermore, the slide rail has a segmented structure, and includes a first slide rail segment 251, a second slide rail segment 252, and a third slide rail segment 253, which are sequentially arranged and connected around the axis of the centrifugal fan chamber 13. The first slide rail segment 251 and the third slide rail segment 253 are both located radially inward of the second slide rail segment 252, and the first slide rail segment 251 and the third slide rail segment 253 extend in a direction away from each other.

[0076] When the volute tongue sliding portion is at the end of the first slide rail section 251 away from the second slide rail section 252, the blade chamber air outlet 133 is in an open state; the first blade chamber peripheral wall 131, the fixed volute tongue 213 and the other part of the sliding volute tongue 3 are arranged in sequence and form a continuous profile, thereby reducing the resistance of the sliding volute tongue 3;

[0077] When the volute tongue sliding portion is at the end of the third slide rail section 253 away from the second slide rail section 252, the air outlet 133 of the fan chamber is in a closed state; the sliding volute tongue 3 seals the air outlet 133 of the fan chamber tightly, reducing the loss of air supply volume;

[0078] When the volute tongue sliding portion is in the second slide rail section 252 , the sliding volute tongue 3 and the fixed volute tongue 213 do not contact each other, thereby preventing the sliding volute tongue 3 and the fixed volute tongue 213 from colliding.

[0079] Preferably, the first rail section 251 and the third rail section 253 are both linear structures, and are both inclined in a direction away from each other; the second rail section 252 is an arc-shaped structure, and the second rail section 252, the first blade cavity peripheral wall 131, and the second blade cavity peripheral wall 132 have the same profile structure; so that the volute tongue sliding portion can slide stably along the first rail section 251 and the third rail section 253, and when the volute tongue sliding portion is in the second rail section 252, the sliding volute tongue 3 has little resistance to the flow of air;

[0080] The first slide rail segment 251 , the second slide rail segment 252 and the third slide rail segment 253 have the same width.

[0081] Furthermore, the slide rails include an A slide rail 241, a B slide rail 242, a C slide rail 243, and a D slide rail 136, which are sequentially arranged around the air outlet 133 of the blade chamber. The A slide rail 241 and the D slide rail 136 are spaced apart and arranged on a side close to the volute 11, and the B slide rail 242 and the C slide rail 243 are spaced apart and arranged on a side close to the volute cover 12.

[0082] There are four volute tongue sliding parts, namely sliding part a, sliding part b 311, sliding part c 312 and sliding part d. Sliding part a and sliding part d are arranged at intervals along the circumference of the fan chamber 13 on the side of the sliding volute tongue 3 close to the volute 11, and sliding part b 311 and sliding part c 312 are arranged at intervals along the circumference of the fan chamber 13 on the side of the sliding volute tongue 3 close to the volute cover 12.

[0083] The a sliding portion cooperates with the A slide rail 241, the b sliding portion 311 cooperates with the B slide rail 242, the c sliding portion 312 cooperates with the C slide rail 243, and the d sliding portion cooperates with the D slide rail 136; so that the sliding volute tongue 3 can slide stably along the four slide rails and the sliding volute tongue 3 closes the air outlet 133 of the fan chamber tightly;

[0084] Preferably, the A slide rail 241, the B slide rail 242, the C slide rail 243 and the D slide rail 136 are all groove structures, that is, they are all slide grooves; the a sliding part, the b sliding part 311, the c sliding part 312 and the d sliding part are all shaft structures, that is, they are all sliding shafts.

[0085] This embodiment further proposes that, in the A rail 241 and the B rail 242, the connection point between the second rail segment 252 and the third rail segment 253 is point M, the line passing through point M and tangent to the extension direction of the second rail segment 252 is tangent line m, and the angle α between the tangent line m and the extension direction of the third rail segment 253 satisfies the following conditions: 30°≤α≤60°; this ensures a smooth transition between the second rail segment 252 and the third rail segment 253, thereby improving the stability of the movement of the sliding tongue 3;

[0086] Preferably, α=45°;

[0087] If α is too large, the horizontal resistance of the sliding volute tongue 3 will be too large when it moves toward the end close to the air outlet 133 of the fan chamber, increasing the load on the drive motor 6; if α is too small, the movement gap H between the end of the sliding volute tongue 3 close to the air outlet 133 of the fan chamber and the fixed volute tongue 213 will be less than the safe distance, the stroke will be too long, and the chance of scratching will increase.

[0088] The snail tongue sliding part cooperates with the corresponding slide rail as follows:

[0089] When the sliding volute tongue 3 fully opens the air outlet 133 of the blade chamber, the sliding portion a cooperates with the first slide rail section 251 of the slide rail A 241 , the sliding portion b cooperates with the first slide rail section 251 of the slide rail B 242 , the sliding portion c 312 cooperates with the first slide rail section 251 of the slide rail C 243 , and the sliding portion d cooperates with the first slide rail section 251 of the slide rail D 136 ;

[0090] When the sliding tongue 3 partially opens the air outlet 133 of the blade chamber, the sliding portion a cooperates with the second slide rail section 252 of the slide rail A 241 , the sliding portion b cooperates with the second slide rail section 252 of the slide rail B 242 , the sliding portion c 312 cooperates with the second slide rail section 252 of the slide rail C 243 , and the sliding portion d cooperates with the second slide rail section 252 of the slide rail D 136 ;

[0091] When the sliding volute tongue 3 closes the air outlet 133 of the blade chamber, the sliding portion a cooperates with the third slide rail segment 253 of the slide rail A 241, the sliding portion b cooperates with the third slide rail segment 253 of the slide rail B 242, the sliding portion c 312 cooperates with the third slide rail segment 253 of the slide rail C 243, and the sliding portion d cooperates with the third slide rail segment 253 of the slide rail D 136. The third slide rail segment 253 of the slide rail D 136 tilts upward, and the movement gap H between the sliding volute tongue 3 and the first box opening 211 gradually decreases during the rightward movement, reaching a minimum when in place.

[0092] The structure is simple and the volume is small, and the sliding volute tongue 3 can be smoothly switched between the two working positions.

[0093] This embodiment further proposes that the air duct mechanism includes a accommodating box 2, which is arranged between the first fan chamber peripheral wall 131 and the fan chamber air outlet 133; a fixed volute 213 is formed on the side wall of the accommodating box 2 close to the axis of the centrifugal fan chamber 13, and an accommodating chamber 23 is formed inside the accommodating box 2. A first box opening 211 communicating with the accommodating chamber 23 is formed on one side of the accommodating box 2 close to the fan chamber air outlet 133; the sliding volute 3 is slidably arranged between the accommodating chamber 23 and the fan chamber air outlet 133 through the first box opening 211;

[0094] The centrifugal fan chamber 13 further includes a fan chamber shaft wall 135 disposed at one end of the axis of the centrifugal fan chamber 13 . The accommodating box 2 includes a first accommodating box shaft wall 214 and a second accommodating box shaft wall 221 disposed opposite to each other. The first accommodating box shaft wall 214 is disposed close to the fan chamber shaft wall 135 , and the second accommodating box shaft wall 221 is disposed away from the fan chamber shaft wall 135 .

[0095] The first receiving box shaft wall 214 is formed with an A slide rail 241 , the second receiving box shaft wall 221 is formed with a B slide rail 242 and a C slide rail 243 , and the fan chamber shaft wall 135 is formed or provided with a D slide rail 136 ;

[0096] The sliding tongue 3 includes a first tongue axial wall close to the fan blade cavity axial wall 135 and a second tongue axial wall 31 away from the fan blade cavity axial wall. The first tongue axial wall is formed with a sliding portion a and a sliding portion d spaced apart, and the second tongue axial wall 31 is formed with a sliding portion b 311 and a sliding portion c 312 spaced apart. The sliding portion a and the sliding portion b 311 correspond to each other in the axial direction of the sliding tongue 3, and the sliding portion c 312 and the sliding portion d correspond to each other in the axial direction of the sliding tongue 3.

[0097] Only the D slide rail 136 is formed on the fan blade chamber shaft wall 135, and the A slide rail 241, the B slide rail 242 and the C slide rail 243 are all formed on the side wall of the accommodating box 2, which simplifies the structure of the volute 11 and the volute cover 12; the size of the four slide rails can be adjusted according to actual needs; the fixed volute tongue 213 and the sliding volute tongue 3 cooperate to form a continuous profile to reduce air flow resistance.

[0098] Specifically, when the sliding volute 3 switches from the first working position to the second working position, the a sliding part enters the second slide rail section 252 of the A slide rail 241 from the first slide rail section 251 of the A slide rail 241 and moves downward, the b sliding part 311 enters the second slide rail section 252 of the B slide rail 242 from the first slide rail section 251 of the B slide rail 242 and moves downward, the c sliding part 312 enters the second slide rail section 252 of the C slide rail 243 from the first slide rail section 251 of the C slide rail 243 and moves horizontally to the right, and the d sliding part enters the second slide rail section 252 of the D slide rail 136 from the first slide rail section 251 of the D slide rail 136 and moves horizontally to the right; the movement gap H between the sliding volute tongue 3 and the accommodating box 2 increases at a faster speed during the movement of the sliding volute tongue 3 to avoid the sliding volute tongue 3 and the accommodating box 2 from scratching; the movement gap H gradually increases during the movement of the sliding volute tongue 3, so when the sliding volute tongue 3 switches from the second working state to the first working state, the sliding volute tongue 3 The gap between the tongue 3 and the receiving box 2 is minimal and can be designed to be within 1 mm to avoid air leakage; a flexible material can be provided at the fitting point between the sliding volute tongue 3 and the receiving box 2 to improve the sealing effect; the sliding volute tongue 3 continues to move to the right, and the sliding part a and the sliding part b 311 move obliquely downward. When the movement gap h between the end of the sliding volute tongue 3 away from the air outlet 133 of the fan chamber and the receiving box 2, and the movement gap H between the sliding volute tongue 3 and the first box opening 211211 are greater than the safety gap (the safety gap refers to: the minimum distance between two moving parts without scratching, generally more than 3 mm), the sliding part a enters the second slide rail section 252 of the A slide rail 241, the sliding part b 311 is located in the second slide rail section 252 of the B slide rail 242, the sliding part c 312 is located in the second slide rail section 252 of the C slide rail 243, and the sliding part d is located in the second slide rail section 252 of the D slide rail 136, the sliding volute tongue 3 can rotate counterclockwise around the axis of the centrifugal fan chamber 13.

[0099] Furthermore, the storage box 2 includes a storage box body 21 and a storage cover 22. A first box opening 211 is formed at one end of the storage box body 21 close to the fan chamber air outlet 133. A side wall of the storage box body 21 close to the fan chamber axis wall 135 is a first storage box axis wall 214. A second box opening 212 is formed on the side wall of the storage box body 21 away from the fan chamber axis wall 135.

[0100] The accommodating cover 22 is disposed on the second box opening 212 and the accommodating cover 22 and the accommodating box body 21 form an accommodating cavity 23 ; the accommodating cover 22 includes a second accommodating box axis wall 221 ;

[0101] The circumferential extension length of the accommodating box body 21 is smaller than the circumferential extension length of the sliding volute tongue 3, and the circumferential extension length of the accommodating cover body 22 is larger than the circumferential extension length of the sliding volute tongue 3; when the volute tongue sliding portion is at one end of the slide rail, a portion of the sliding volute tongue 3 can be accommodated in the accommodating cavity 23, and the sliding volute tongue 3 and the fixed volute tongue 213 can form a continuous profile; when the volute tongue sliding portion is at the other end of the slide rail, the sliding volute tongue 3 closes the air outlet 133 of the fan blade cavity tightly, and the sliding volute tongue 3 and the fixed volute tongue 213 can form a continuous profile.

[0102] This embodiment also proposes that when the B slide rail 242 is a groove structure, the B slide rail 242 passes through the second accommodating box shaft wall 221; when the b sliding portion 311 is an axis structure, the b sliding portion 311 is disposed inside the B slide rail 242;

[0103] The air duct mechanism also includes a transmission assembly 4, which includes a gear 42, a rack 41, and a connecting rod 43. The gear 42 and the rack 41 are both disposed on a side of the second accommodating box shaft wall 221 away from the accommodating box body 21. The gear 42 and the rack 41 are meshed, and the gear 42 can be controlled to rotate and the rack 41 can be controlled to slide. The rack 41 is made of a flexible material. One end of the connecting rod 43 is hinged to the sliding portion b 311, and the other end of the connecting rod 43 is hinged to the rack 41.

[0104] When the gear 42 rotates, the rack 41 can drive the connecting rod 43 and the sliding volute 3 to move;

[0105] A rack groove 222 is formed on the side of the second storage box shaft wall 221 away from the storage box body 21, and the rack 41 can slide back and forth in the rack groove 222; the structure of the slide rail and the structure of the rack groove 222 can be different, and thus the movement trajectory of the sliding tongue 3 and the movement trajectory of the rack 41 can be different; compared with the rack 41, the movement of the sliding tongue 3 is freer.

[0106] Furthermore, the air duct mechanism also includes a sealing cover body 51, which is arranged on the side of the accommodating cover body 22 away from the accommodating box body 21 and an installation cavity is formed between the sealing cover body 51 and the accommodating cover body 22; a transmission component 4 is arranged in the installation cavity to ensure the sealing of the transmission component 4.

[0107] In addition, the air duct mechanism further includes a sleeve 52. The sleeve 52 is an integrated structure, including a sleeve body 521 and a support portion 522. An axial hole is formed inside the sleeve body 521. The support portion 522 is provided at one axial end of the sleeve body 521 and has a support curved surface 523.

[0108] The shaft hole is used to penetrate the a sliding portion and / or the c sliding portion 312 and / or the d sliding portion, and the supporting curved surface 523 is used to abut against the wall surface on which the A slide rail 241 is formed and / or the wall surface on which the C slide rail 243 is formed and / or the wall surface on which the D slide rail 136 is formed; that is, when the shaft hole penetrates the a sliding portion, the supporting curved surface 523 abuts against the wall surface on which the A slide rail 241 is formed; when the shaft hole penetrates the c sliding portion 312, the supporting curved surface 523 abuts against the wall surface on which the C slide rail 243 is formed; and when the shaft hole penetrates the d sliding portion, the supporting curved surface 523 abuts against the wall surface on which the D slide rail 136 is formed.

[0109] The shaft sleeve 52 is designed with support points in each force direction, so that a single shaft sleeve 52 can play a multi-directional support role, thereby reducing the number of shaft sleeves 52 used; the wall surface of the sliding rail formed by the sliding tongue 3 maintains point contact with the supporting curved surface 523 during the movement of the sliding tongue 3. Compared with surface contact, point contact can greatly reduce the friction between the wall surface of the sliding rail formed by the sliding tongue 3 and the supporting curved surface 523 during the movement of the sliding tongue 3, thereby reducing the movement load of the sliding tongue 3; it solves the problem that the existing shaft sleeve can only achieve single-directional support, resulting in the need to use many support parts.

[0110] Furthermore, the support portion 522 is a support bridge having an arc-shaped structure, and both ends of the support bridge are connected to one axial end of the sleeve body 521; the support curved surface 523 is a spherical surface;

[0111] Specifically, the a sliding part, the c sliding part 312 and the d sliding part are all matched with the corresponding sliding rails through the shaft sleeve 52; the shaft sleeve 52 can achieve support in two directions, so that the sliding volute 3 can meet the required support with only one support member. At the same time, the spherical design can reduce the friction force suffered by the sliding volute 3 during movement, thereby reducing the movement load of the sliding volute 3.

[0112] This embodiment also proposes that when the sliding volute tongue 3 opens and closes the air outlet 133 of the fan blade chamber, the distance between the point on the center line of the sliding volute tongue 3 and the axis of the centrifugal fan blade chamber 13 gradually increases from the air outlet 133 to the peripheral wall 131 of the first fan blade chamber, and the distance between the point on the center line of the fixed volute tongue 213 and the axis of the centrifugal fan blade chamber 13 gradually increases; when air flows through the sliding volute tongue 3 and the fixed volute tongue 213, the sliding volute tongue 3 and the fixed volute tongue 213 can continuously pressurize the air; through experimental tests, the distance between the point on the center line of the sliding volute tongue 3 and the axis of the centrifugal fan blade chamber 13 gradually increases, and compared with the equidistant distance between the point on the center line of the sliding volute tongue 3 and the axis of the centrifugal fan blade chamber 13, the air supply volume can be increased by 30m 3 / h; the distance between the point on the center line of the fixed volute tongue 213 and the axis of the centrifugal fan chamber 13 gradually increases, and the air supply volume can be increased by 30m compared with the equidistant distance between the point on the center line of the fixed volute tongue 213 and the axis of the centrifugal fan chamber 13. 3 / h.

[0113] This embodiment further proposes that a retaining rib 15 is provided between the fixed volute tongue 213 and the second blade cavity peripheral wall 132, and a blade cavity air outlet 133 is formed between the retaining rib 15 and the second blade cavity peripheral wall 132;

[0114] The sliding volute tongue 3 includes a first volute tongue segment 321 and a second volute tongue segment 322, and the second volute tongue segment 322 is connected to the first volute tongue segment 321; an avoidance groove 33 is formed on the side of the second volute tongue segment 322 away from the axis of the centrifugal fan chamber 13, and the avoidance groove 33 is used to avoid the retaining rib 15 when the sliding volute tongue 3 slides along the slide rail; when the fan chamber outlet 133 is in the open state, the first volute tongue segment 321 is located radially outside the fixed volute tongue 213, and the second volute tongue segment 322 is arranged close to the fan chamber outlet 133; the thickness of the first volute tongue segment 321 is less than the thickness of the second volute tongue segment 322.

[0115] This embodiment further proposes that the volute 11 and the volute cover 12 are further formed with an air supply duct 14; the air supply duct 14 includes an upper air supply duct 141, and the upper air supply duct 141 is located above the centrifugal fan chamber 13; the fan chamber air outlet 133 includes an upper air outlet of the fan chamber, and when the upper air outlet of the fan chamber is in an open state, the centrifugal fan chamber 13 and the upper air supply duct 141 are connected through the upper air outlet of the fan chamber; when the upper air outlet of the fan chamber is in a closed state, the centrifugal fan chamber 13 and the upper air supply duct 141 are not connected; and / or,

[0116] The air supply duct includes a lower air supply duct 142, which is located below the centrifugal fan chamber 13; the fan chamber air outlet 133 includes a fan chamber lower air outlet, and when the fan chamber lower air outlet is in an open state, the centrifugal fan chamber 13 and the lower air supply duct 142 are connected through the fan chamber lower air outlet; when the fan chamber lower air outlet is in a closed state, the centrifugal fan chamber 13 and the lower air supply duct 142 are not connected;

[0117] Preferably, an upper sliding volute tongue 3 is provided near the upper air outlet of the fan blade cavity, and a lower sliding volute tongue 3 is provided near the lower air outlet of the fan blade cavity; when the lower sliding volute tongue 3 closes the lower air outlet of the fan blade cavity and the upper sliding volute tongue 3 opens the upper air outlet of the fan blade cavity, the air in the centrifugal fan blade cavity 13 can enter the upper air supply duct 141 through the upper air outlet of the fan blade cavity, thereby realizing upper air outlet; when the upper sliding volute tongue 3 closes the upper air outlet of the fan blade cavity and the lower sliding volute tongue 3 opens the lower air outlet of the fan blade cavity, the air in the centrifugal fan blade cavity 13 can enter the lower air supply duct through the lower air outlet of the fan blade cavity 142, realizing downward air outlet; when the upper sliding volute tongue 3 opens the upper air outlet of the fan blade chamber and the lower sliding volute tongue 3 partially opens the lower air outlet of the fan blade chamber, a part of the air in the centrifugal fan blade chamber 13 can enter the upper air supply duct 141 through the upper air outlet of the fan blade chamber, and another part of the air in the centrifugal fan blade chamber 13 can enter the lower air supply duct 142 through the lower air outlet of the fan blade chamber, realizing simultaneous upper and lower air outlet; the air supply loss is small, and the flow area of ​​the corresponding fan blade chamber outlet 133 can be adjusted by sliding the volute tongue 3 to achieve the optimal ratio of upper air supply volume to lower air supply volume.

[0118] In addition, the volute 11 is formed with a blade chamber air inlet 137 at a position corresponding to one axial side of the centrifugal blade chamber 13, and / or the volute cover 12 is formed with a blade chamber air inlet 137 at a position corresponding to one axial side of the centrifugal blade chamber 13; when the centrifugal blades 16 rotate, air outside the volute assembly 1 can enter the centrifugal blade chamber 1 through the blade chamber air inlet 137; the air in the centrifugal blade chamber 13 can enter the upper air supply duct 141 through the upper air outlet of the blade chamber, and / or the air in the centrifugal blade chamber 13 can enter the lower air supply duct 142 through the lower air outlet of the blade chamber;

[0119] The volute 11 is box-shaped, and the side of the volute 11 opposite to the volute cover 12 is the volute main wall 111, and the volute main wall 111 forms an air inlet 137 of the fan chamber; the side of the volute 11 facing the volute cover 12 is formed with a volute opening 112, and the volute cover 12 is covered at the volute opening 112, and the volute cover 12 and the volute 11 form an air supply duct 14 and a centrifugal fan chamber 13.

[0120] This embodiment also provides a cabinet air conditioner, including an indoor unit, the indoor unit including a shell and any one of the air duct mechanisms described above; the shell is enclosed to form a shell cavity, and the volute assembly 1 is arranged in the shell cavity; the shell is formed with a shell air inlet, and when the centrifugal fan blade 16 rotates, the indoor air can enter the shell cavity through the shell air inlet, and then enter the centrifugal fan blade cavity 1 through the fan cavity air inlet 137; specifically, the shell includes a left wall of the shell and an outer wall of the shell, the left wall of the shell and the volute main wall 111 are correspondingly arranged, and the right wall of the shell and the volute cover 12 are correspondingly arranged; an indoor heat exchanger is arranged between the left wall of the shell and the volute main wall 111, and another indoor heat exchanger is arranged between the right wall of the shell and the volute cover 12.

[0121] While the exemplary embodiments of the present disclosure have been specifically illustrated and described above, it should be understood that the present disclosure is not limited to the detailed structures, configurations, or implementations described herein; rather, the present disclosure is intended to encompass various modifications and equivalent configurations within the spirit and scope of the appended claims.

Claims

1. An air duct mechanism, characterized in that: The invention comprises a volute (11) and a volute cover (12), wherein the volute (11) and the volute cover (12) are buckled together to form a centrifugal blade chamber (13), wherein the centrifugal blade chamber (13) comprises a first blade chamber peripheral wall (131), a blade chamber air outlet (133), and a second blade chamber peripheral wall (132) sequentially arranged along the circumference of the centrifugal blade chamber (13); a fixed volute tongue (213) is provided between the first blade chamber peripheral wall (131) and the blade chamber air outlet (133); The air duct mechanism further comprises a sliding volute tongue (3) for opening and closing the air outlet (133) of the fan blade chamber, wherein the sliding volute tongue (3) is slidably arranged between the volute case (11) and the volute cover (12), and the sliding volute tongue (3) is formed with a volute tongue sliding portion; A slide rail is provided between the volute (11) and the volute cover (12), and the slide rail is used to cooperate with the volute tongue sliding portion and guide the sliding volute tongue (3) to slide between the directions of opening and closing the air outlet (133) of the fan chamber; from one end to the other end of the slide rail, the distance between the point on the center line of the slide rail and the axis of the centrifugal fan chamber (13) first increases and then decreases; When the volute tongue sliding portion is at one end of the slide rail, the sliding volute tongue (3) can open the air outlet (133) of the fan blade chamber, a portion of the sliding volute tongue (3) is located radially outside the fixed volute tongue (213), and the first fan blade chamber peripheral wall (131), the fixed volute tongue (213) and another portion of the sliding volute tongue (3) are sequentially arranged to form a continuous profile line; When the volute tongue sliding portion is at the other end of the slide rail, the sliding volute tongue (3) can close the air outlet (133) of the fan blade chamber, and the first fan blade chamber peripheral wall (131), the fixed volute tongue (213), the sliding volute tongue (3) and the second fan blade chamber peripheral wall (132) are arranged in sequence and form a continuous profile line; When the volute tongue sliding portion is located between one end and the other end of the slide rail, the sliding volute tongue (3) and the fixed volute tongue (213) are not in contact.

2. The air duct mechanism according to claim 1, characterized in that: The slide rail is a segmented structure, comprising a first slide rail segment (251), a second slide rail segment (252), and a third slide rail segment (253) sequentially arranged around the axis of the centrifugal fan blade cavity (13); the first slide rail segment (251) and the third slide rail segment (253) are both located radially inward of the second slide rail segment (252); and the first slide rail segment (251) and the third slide rail segment (253) extend in directions away from each other; When the volute tongue sliding portion is at an end of the first slide rail section (251) away from the second slide rail section (252), the fan blade chamber air outlet (133) is in an open state; When the volute tongue sliding portion is at an end of the third slide rail section (253) away from the second slide rail section (252), the fan blade chamber air outlet (133) is in a closed state.

3. The air duct mechanism according to claim 2, characterized in that: The first slide rail section (251) and the third slide rail section (253) are both linear structures; the second slide rail section (252) is an arc-shaped structure; the second slide rail section (252), the first fan blade cavity peripheral wall (131) and the second fan blade cavity peripheral wall (132) have the same profile structure.

4. The air duct mechanism according to claim 3, characterized in that: The slide rails include an A slide rail (241), a B slide rail (242), a C slide rail (243), and a D slide rail (136) sequentially arranged around the air outlet (133) of the fan chamber, wherein the A slide rail (241) and the D slide rail (136) are spaced apart and arranged on a side close to the volute (11), and the B slide rail (242) and the C slide rail (243) are spaced apart and arranged on a side close to the volute cover (12); The volute tongue sliding parts are provided with four, and the four volute tongue sliding parts are respectively a sliding part, b sliding part (311), c sliding part (312) and d sliding part; the a sliding part and d sliding part are arranged at intervals on the side of the sliding volute tongue (3) close to the volute case (11), and the b sliding part (311) and c sliding part (312) are arranged at intervals on the side of the sliding volute tongue (3) close to the volute cover (12); The a sliding part cooperates with the A slide rail (241), the b sliding part (311) cooperates with the B slide rail (242), the c sliding part (312) cooperates with the C slide rail (243), and the d sliding part cooperates with the D slide rail (136).

5. The air duct mechanism according to claim 4, characterized in that: In the A slide rail (241) and the B slide rail (242), the connection point of the second slide rail segment (252) and the third slide rail segment (253) is point M, the line passing through point M and tangent to the extension direction of the second slide rail segment (252) is tangent line m, and the angle between the tangent line m and the extension direction of the third slide rail segment (253) is α, which satisfies: 30°≤α≤60°.

6. The air duct mechanism according to claim 5, characterized in that: α＝45°。 7. The air duct mechanism according to claim 4, characterized in that: When the sliding volute tongue (3) fully opens the air outlet (133) of the blade chamber, the a sliding portion cooperates with the first slide rail section (251) of the A slide rail (241), the b sliding portion (311) cooperates with the first slide rail section (251) of the B slide rail (242), the c sliding portion (312) cooperates with the first slide rail section (251) of the C slide rail (243), and the d sliding portion cooperates with the first slide rail section (251) of the D slide rail (136); When the sliding volute tongue (3) partially opens the air outlet (133) of the fan blade chamber, the a sliding portion cooperates with the second slide rail section (252) of the A slide rail (241), the b sliding portion (311) cooperates with the second slide rail section (252) of the B slide rail (242), the c sliding portion (312) cooperates with the second slide rail section (252) of the C slide rail (243), and the d sliding portion cooperates with the second slide rail section (252) of the D slide rail (136); the sliding volute tongue (3) can rotate around the axis of the centrifugal fan blade chamber (13); When the sliding volute tongue (3) closes the air outlet (133) of the fan blade chamber, the a sliding portion cooperates with the third slide rail section (253) of the A slide rail (241), the b sliding portion (311) cooperates with the third slide rail section (253) of the B slide rail (242), the c sliding portion (312) cooperates with the third slide rail section (253) of the C slide rail (243), and the d sliding portion cooperates with the third slide rail section (253) of the D slide rail (136).

8. The air duct mechanism according to claim 4, characterized in that: The centrifugal fan chamber comprises a housing box, the housing box being arranged between the first fan chamber peripheral wall (131) and the fan chamber air outlet (133); the side wall of the housing box close to the axis of the centrifugal fan chamber (13) is formed with the fixed volute tongue (213); the interior of the housing box is formed with a housing cavity (23); a side of the housing box close to the fan chamber air outlet (133) is formed with a first box opening (211) communicating with the housing cavity (23); the sliding volute tongue (3) is slidably arranged between the housing cavity (23) and the fan chamber air outlet (133) via the first box opening (211); The centrifugal fan chamber (13) further comprises a fan chamber shaft wall (135) arranged at one end of the axis of the centrifugal fan chamber (13); the accommodating box comprises a first accommodating box shaft wall (214) and a second accommodating box shaft wall (221) arranged opposite to each other; the first accommodating box shaft wall (214) is arranged close to the fan chamber shaft wall (135), and the second accommodating box shaft wall (221) is arranged away from the fan chamber shaft wall (135); The first accommodating box shaft wall (214) is formed with the A slide rail (241), the second accommodating box shaft wall (221) is formed with the B slide rail (242) and the C slide rail (243), and the fan blade chamber shaft wall (135) is formed or provided with the D slide rail (136).

9. The air duct mechanism according to claim 8, characterized in that: The accommodating box comprises an accommodating box body (21) and an accommodating cover body (22); a first box opening (211) is formed at one end of the accommodating box body (21) close to the fan blade cavity air outlet (133); a side wall of the accommodating box body (21) close to the fan blade cavity axial wall (135) is a first accommodating box axial wall (214); and a side wall of the accommodating box body (21) away from the fan blade cavity axial wall (135) is formed with a second box opening (212); The accommodating cover (22) is disposed on the second box opening (212), and the accommodating cover (22) and the accommodating box body (21) form the accommodating cavity (23); the accommodating cover (22) includes the second accommodating box axis wall (221); The circumferential extension length of the accommodating box body (21) is smaller than the circumferential extension length of the sliding volute tongue (3), and the circumferential extension length of the accommodating cover body (22) is larger than the circumferential extension length of the sliding volute tongue (3).

10. The air duct mechanism according to claim 9, characterized in that: The B slide rail (242) is a groove structure, and the B slide rail (242) passes through the second accommodating box shaft wall (221); the b sliding portion (311) is an axis structure, and the b sliding portion (311) is arranged in the B slide rail (242); The air duct mechanism further comprises a transmission assembly (4), the transmission assembly (4) comprising a gear (42), a rack (41) and a connecting rod (43); the gear (42) and the rack (41) are both arranged on a side of the second accommodating box shaft wall (221) away from the accommodating box body (21), the gear (42) and the rack (41) are meshed, the gear (42) can be controlled to rotate, the rack (41) can be controlled to slide, and the rack (41) is made of a flexible material; one end of the connecting rod (43) is hinged to the b sliding portion (311), and the other end of the connecting rod (43) is hinged to the rack (41); When the gear (42) rotates, the rack (41) can move with the connecting rod (43) and the sliding volute tongue (3).

11. The air duct mechanism according to claim 10, characterized in that: The invention also includes a sealing cover (51), wherein the sealing cover (51) is arranged on a side of the accommodating cover (22) away from the accommodating box body (21), and an installation cavity is formed between the sealing cover (51) and the accommodating cover (22); the transmission assembly (4) is arranged in the installation cavity.

12. The air duct mechanism according to claim 4, characterized in that: The shaft sleeve (52) further comprises a shaft sleeve body (521) and a support portion (522). An axial hole is formed inside the shaft sleeve body (521). The support portion (522) is arranged at one axial end of the shaft sleeve body (521), and a support curved surface (523) is formed on the support portion (522). The axial hole is used to penetrate the a sliding part and / or the c sliding part (312) and / or the d sliding part, and the supporting curved surface (523) is used to abut against the wall surface formed with the A slide rail (241) and / or the wall surface formed with the C slide rail (243) and / or the wall surface formed with the D slide rail (136).

13. The air duct mechanism according to claim 12, characterized in that: The support portion (522) is a support bridge, the support bridge is an arc-shaped structure, and both ends of the support bridge are connected to one axial end of the sleeve body (521); the support curved surface (523) is a spherical surface.

14. The air duct mechanism according to claim 1, characterized in that: When the sliding volute tongue (3) opens or closes the air outlet (133) of the fan chamber, the distance between a point on the center line of the sliding volute tongue (3) and the axis of the centrifugal fan chamber (13) gradually increases from the air outlet (133) of the fan chamber to the peripheral wall (131) of the first fan chamber, and the distance between a point on the center line of the fixed volute tongue (213) and the axis of the centrifugal fan chamber (13) gradually increases.

15. The air duct mechanism according to claim 1, characterized in that: A retaining rib (15) is provided between the fixed volute tongue (213) and the second blade cavity peripheral wall (132), and the blade cavity air outlet (133) is formed between the retaining rib (15) and the second blade cavity peripheral wall (132); The sliding volute tongue (3) comprises a first volute tongue section (321) and a second volute tongue section (322), wherein the second volute tongue section (322) is connected to the first volute tongue section (321); a side of the second volute tongue section (322) away from the axis of the centrifugal fan chamber (13) is formed with an avoidance groove (33), and the avoidance groove (33) is used for the sliding volute tongue (3) to avoid the retaining rib (15) when sliding along the slide rail; when the fan chamber air outlet (133) is in an open state, the first volute tongue section (321) is located radially outside the fixed volute tongue (213), and the second volute tongue section (322) is arranged close to the fan chamber air outlet (133).

16. The air duct mechanism according to claim 1, characterized in that: The volute (11) and the volute cover (12) are further formed with an air supply duct (14); the air supply duct (14) includes an upper air supply duct (141), and the upper air supply duct (141) is located above the centrifugal fan chamber (13); the fan chamber air outlet (133) includes an upper fan chamber air outlet, and when the upper fan chamber air outlet is in an open state, the centrifugal fan chamber (13) and the upper air supply duct (141) are connected through the upper fan chamber air outlet; when the upper fan chamber air outlet is in a closed state, the centrifugal fan chamber (13) and the upper air supply duct (141) are not connected; and / or, The air supply duct includes a lower air supply duct (142), and the lower air supply duct (142) is located below the centrifugal fan blade chamber (13); the fan blade chamber air outlet (133) includes a fan blade chamber lower air outlet, and when the fan blade chamber lower air outlet is in an open state, the centrifugal fan blade chamber (13) and the lower air supply duct (142) are connected through the fan blade chamber lower air outlet; when the fan blade chamber lower air outlet is in a closed state, the centrifugal fan blade chamber (13) and the lower air supply duct (142) are not connected.

17. A cabinet air conditioner, characterized in that: The air duct mechanism comprises the air duct mechanism according to any one of claims 1 to 16.

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