Limiting tool for volute and duct type air conditioner

Abstract

The invention relates to a limiting tool for a volute and a duct type air conditioner. The limiting tool for the volute is applied to the duct type air conditioner, the duct type air conditioner comprises a shell and the volute installed in the shell, the limiting tool for the volute is used for driving and limiting displacement of the volute in the rotating process, the limiting tool for the volute comprises an installation base, a driving assembly and a limiting assembly, and the installation base is installed on the shell; the driving assembly is mounted on the mounting seat, the driving assembly comprises a driving motor and a driving gear connected with an output shaft of the driving motor, and the driving gear is configured to be meshed with a tooth groove part in the peripheral surface of the volute so as to drive the volute to rotate; and the limiting assembly is arranged on the mounting seat, and the limiting assembly is configured to be clamped with a matching part on the volute so as to limit the displacement of the volute in the axial direction of the volute.

Description

Technical Field

[0001] This disclosure relates to the field of duct air conditioners with a volute housing limiting fixture, and more particularly to a volute housing limiting fixture and a duct air conditioner. Background Technology

[0002] Ductless air conditioners, as concealed air duct systems, are widely used for indoor temperature control due to their economical cost and convenient maintenance. However, when traditional ductless air conditioners are in heating mode, the side-discharge design tends to cause hot air to rise, resulting in lower temperatures in the lower part of the room and a significant temperature difference between the upper and lower parts, causing comfort issues. To improve airflow distribution, existing technology has proposed an indoor unit with reversible airflow, which switches the airflow mode by rotating the duct assembly to adapt to different airflow needs.

[0003] However, in the aforementioned existing technical solutions, the volute in the rotating duct assembly relies on indirect drive devices on both sides of the housing. This results in a long transmission chain and large span, making the volute susceptible to gravity or cumulative transmission errors during rotation, leading to axial movement or radial deviation. This displacement not only disrupts the uniformity and directional accuracy of the airflow field but may also cause abnormal noise, component interference and wear, severely restricting the stability and overall performance of the equipment, and limiting the application of ducted air conditioners in precision air delivery scenarios.

[0004] Therefore, there is an urgent need for a tooling structure that can achieve direct drive and simultaneously constrain the multi-directional displacement of the volute. Summary of the Invention

[0005] This disclosure provides a limiting fixture for a volute and a duct machine to solve the technical problem in the prior art where the volute is easily affected by gravity or cumulative transmission errors during rotation, resulting in axial movement or radial deviation.

[0006] This disclosure provides a limiting fixture for a volute housing, applied to a duct air conditioner. The duct air conditioner includes a housing and a volute housing installed within the housing. The limiting fixture includes a mounting base, a drive assembly, and a limiting assembly for driving and limiting the displacement of the volute housing during rotation. The mounting base is installed on the housing. The drive assembly is installed on the mounting base and includes a drive motor and a drive gear connected to the output shaft of the drive motor. The drive gear is configured to mesh with a toothed portion on the outer circumferential surface of the volute housing to drive the volute housing to rotate. The limiting assembly is disposed on the mounting base and configured to engage with a mating portion on the volute housing to limit the axial displacement of the volute housing.

[0007] The limiting component includes a hook disposed on the mounting base, the hook being configured to extend into a slot on the volute, and a gap between the hook and the slot allowing the volute to rotate.

[0008] The slot is an arc-shaped groove extending along the rotation direction of the volute, and the end of the hook is located in the arc-shaped groove and can slide along the arc-shaped groove.

[0009] Wherein, the hook is integrally formed with the mounting base; and / or, the hook is made of an elastic engineering plastic to allow elastic deformation during assembly.

[0010] The output shaft of the drive motor is provided with a mounting flat part, and the drive gear is provided with a mounting hole that matches the mounting flat part. The drive gear completes circumferential locking and limiting with the output shaft through the mounting flat part.

[0011] The mounting base includes a base plate and an upright plate extending upward from the base plate. The drive motor is mounted on one side of the upright plate, and the drive gear is located on the other side of the upright plate and passes through a through hole in the upright plate to connect with the output shaft of the drive motor.

[0012] The limiting component includes at least one hook extending from the upright plate toward the volute, the at least one hook being located above or below the drive gear.

[0013] The meshing of the drive gear with the toothed portion is also configured to restrict the displacement of the volute in the direction perpendicular to its axial direction while driving the volute to rotate.

[0014] The mounting base is installed on the inner side of the upper cover plate of the housing by screws; and / or, the mounting base is provided with a shock-absorbing pad, which is located between the mounting base and the housing.

[0015] This disclosure also provides a duct air conditioner, which includes a housing, a volute, and the aforementioned limiting fixture for the volute. The volute is rotatably disposed within the housing, and the outer circumferential surface of the volute is provided with a toothed portion and a mating portion. The mounting base of the limiting fixture for the volute is mounted on the housing, and its drive gear meshes with the toothed portion of the volute, and its limiting component engages with the mating portion of the volute.

[0016] The volute further includes a sealing partition connected to the volute, the toothed portion is formed on the radial outer circumferential surface of the volute, and the mating portion is formed on the end face or side wall near the end face of the volute.

[0017] The mating part is an arc-shaped groove formed on the volute, and the center of the arc-shaped groove coincides with the rotation center of the volute.

[0018] The duct unit also includes a control unit, which is electrically connected to the drive motor of the volute housing limit fixture, and is used to control the start, stop and rotation angle of the drive motor.

[0019] The technical solutions provided in this disclosure have the following advantages compared with the prior art: The volute housing limiting fixture and duct air conditioner provided in this disclosure achieve precise drive through direct meshing of the drive gear and the volute housing tooth groove, replacing the traditional long-span indirect drive method. Simultaneously, the locking constraint between the limiting component and the volute housing mating part specifically restricts the volute housing's movement along its axis, thus solving the multi-directional displacement problem during rotation at its source. In this way, direct meshing drive eliminates transmission chain errors, significantly improving the angle control accuracy and synchronization of the volute housing rotation. At the same time, the locking limiting structure effectively suppresses axial displacement. These two aspects work together to ensure the stability of the volute housing's rotation center, ultimately significantly enhancing the equipment's operational smoothness, reducing abnormal noise, and extending its service life. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0023] Figure 1 A schematic diagram of the assembly structure of the limiting tooling for the volute provided in an embodiment of this disclosure; Figure 2 This is an exploded structural diagram of the limiting tooling for the volute provided in an embodiment of the present disclosure; Figure 3 This is a schematic diagram of the structure of the limiting component installed on the mounting base according to an embodiment of the present disclosure; Figure 4A cross-sectional structural diagram of the limiting fixture for the volute provided in the embodiments of this disclosure installed on the volute; Figure 5 This is a schematic diagram of the structure of the volute assembly provided in an embodiment of this disclosure.

[0024] Explanation of reference numerals in the attached figures: 1. Limiting fixture for volute; 11. Mounting base; 111. Base plate; 112. Vertical plate; 12. Drive assembly; 121. Drive motor; 1211. Output shaft; 12111. Mounting flat part; 122. Drive gear; 1221. Mounting hole; 2. Housing; 21. Top cover plate; 22. Volute; 221. Gear groove; 222. Mating part; 223. Slot; 2231. Clearance; 22A. Upper volute; 22B. Lower volute; 23. Sealing partition; 3. Limiting assembly; 31. Hook; 4. Gasket; 5. Sealing cover. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0026] The following disclosure provides numerous different embodiments or examples for implementing various structures of this disclosure. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this disclosure. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0027] For ease of description, spatial relative terms may be used in this text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptions used in this text have been explained accordingly.

[0028] To address the technical problem in the prior art where the volute is susceptible to axial movement or radial deviation due to gravity or cumulative transmission errors during rotation, this disclosure provides a limiting fixture for the volute and a duct machine. By using a direct drive connection between the drive motor and the volute, direct meshing drive can be achieved, thereby eliminating transmission chain errors.

[0029] It should be noted that the volute limiting fixture provided in this embodiment is not only applicable to duct machines, but can also be widely used in other mechanical equipment that requires limiting of rotating parts, such as fans, blowers, centrifugal pumps, etc.

[0030] For details, please refer to Figures 1-5 This disclosure provides a limiting fixture 1 for a volute housing, applied to a duct air conditioner. The duct air conditioner includes a housing 2 and a volute housing 22 installed within the housing 2. The limiting fixture 1 is used to drive and limit the displacement of the volute housing 22 during rotation. The limiting fixture 1 includes a mounting base 11, a drive assembly 12, and a limiting assembly 3. The mounting base 11 is installed on the housing 2. The drive assembly 12 is installed on the mounting base 11 and includes a drive motor 121 and a drive gear 122 connected to the output shaft 1211 of the drive motor 121. The drive gear 122 is configured to mesh with a toothed portion 221 on the outer peripheral surface of the volute housing 22 to drive the volute housing 22 to rotate. The limiting assembly 3 is disposed on the mounting base 11 and is configured to engage with a mating portion 222 on the volute housing 22 to limit the displacement of the volute housing 22 along its axial direction.

[0031] For example, the toothed portion 221 refers to a series of grooves or protruding teeth structures formed on the outer peripheral surface of the volute 22 for meshing with the teeth of the drive gear 122.

[0032] For example, the mating part 222 refers to a specific structure provided on the volute 22 for mating with the limiting component 3 to achieve a snap-fit ​​constraint, such as a groove or a protrusion.

[0033] For example, snap-fit ​​refers to a connection state between the limiting component 3 and the mating part 222 of the volute 22, achieved through shape matching or mutual hooking, which allows relative movement between the two in the rotational direction of the volute 22 but restricts their disengagement in the axial direction.

[0034] For example, axial displacement specifically refers to the translation or movement along the axial direction that occurs when the volute 22 rotates about its own axis.

[0035] In this way, precise driving is achieved through the direct meshing of the drive gear 122 and the tooth groove 221 of the volute 22, replacing the traditional long-span indirect driving method. Simultaneously, the locking constraint between the limiting component 3 and the mating part 222 of the volute 22 specifically restricts the axial movement of the volute 22, thus solving the multi-directional displacement problem during rotation at its source. This direct meshing drive eliminates transmission chain errors, significantly improving the angle control accuracy and synchronization of the volute 22's rotation. At the same time, the locking and limiting structure effectively suppresses axial displacement. Together, these two mechanisms ensure the stability of the volute 22's rotation center, ultimately significantly enhancing the smoothness of equipment operation, reducing abnormal noise, and extending service life.

[0036] Consider setting a hook 31 on the mounting base 11 and inserting it into the slot 223 of the volute 22 to construct a sliding pair limiting structure. The interaction between the hook 31 and the side wall of the slot 223 can directly block the volute 22 from moving along its axial direction, while the gap 2231 deliberately reserved between the two ensures that the volute 22 will not have rigid interference or excessive friction with the hook 31 when rotating, thus achieving precise constraint that limits axial displacement but does not hinder rotation.

[0037] The limiting component 3 includes a hook 31 provided on the mounting base 11. The hook 31 is configured to extend into a slot 223 on the volute 22, and there is a gap 2231 between the hook 31 and the slot 223 for the volute 22 to rotate.

[0038] For example, the hook 31 refers to a protrusion with a specific shape that extends from the body of the mounting base 11 toward the volute 22, and its end or side is used to engage with the slot 223.

[0039] For example, the slot 223 refers to a recess or opening structure formed on the surface of the volute 22, the shape and size of which are designed to accommodate at least a portion of the hook 31 extending into it.

[0040] For example, gap 2231 refers to the tiny space that exists between the side of hook 31 and the inner wall of slot 223, or between the end of hook 31 and the bottom wall of slot 223, after hook 31 is inserted into slot 223. This space allows relative movement between hook 31 and slot 223 without hard collision when volute 22 rotates about its axis.

[0041] In this way, the cooperation between the hook 31 and the slot 223 provides a simple and reliable axial physical limit, effectively preventing the volute 22 from axially deviating during rotation; at the same time, the reserved rotation clearance 2231 avoids jamming or excessive wear, ensuring smooth rotation of the volute 22 and improving the working reliability and service life of the tooling.

[0042] Consider designing the slot 223 as an arc-shaped groove that matches the rotation trajectory of the volute 22, and placing the end of the hook 31 inside the arc-shaped groove; this structure allows the hook 31 to slide along the natural rotation path of the volute 22, thereby continuously constraining the hook 31 through the side wall of the arc-shaped groove throughout the rotation of the volute 22, so as to limit the axial displacement of the volute 22.

[0043] Among them, the slot 223 is an arc-shaped slot extending along the rotation direction of the volute 22, and the end of the hook 31 is located in the arc-shaped slot and can slide along the arc-shaped slot.

[0044] For example, an arc groove refers to a groove whose shape is an arc, the extension direction of which is consistent with the tangent direction of the circular trajectory passed by the corresponding point on the volute 22 when it rotates.

[0045] For example, being able to slide along the arc groove means that when the volute 22 rotates about its axis, the end of the hook 31 fixed on the mounting base 11 is in the inner space of the arc groove and can move relative to the volute 22 along the arc path of the arc groove.

[0046] In this way, the arc-shaped groove provides a precise guide path for the hook 31, ensuring that the limiting function is fully compatible with the rotational motion and avoiding motion interference or constraint blind spots that may occur in traditional limiting methods. This not only makes axial limiting more reliable and continuous, but also significantly reduces friction and wear on the sliding contact surface, thereby ensuring the smoothness and stability of the volute 22's long-term rotation.

[0047] Consideration is given to enhancing overall rigidity by making the hook 31 and the mounting base 11 an integral structure, and elastic engineering plastic may be selected as the material of the hook 31; the integral molding ensures that there is no connection gap between the hook 31 and the mounting base 11, thereby providing a more stable limiting base; while the elastic material gives the hook 31 the ability to undergo moderate deformation during assembly, making it easier to be inserted into or snapped into the corresponding slot on the volute 22.

[0048] The hook 31 is integrally formed with the mounting base 11; and / or the hook 31 is made of elastic engineering plastic to allow elastic deformation during assembly.

[0049] For example, integral molding means that the hook 31 and the mounting base 11 are formed into a continuous, non-removable integral part by processing the same material in one process during manufacturing, rather than connecting two separate parts together by subsequent welding, screwing or other methods.

[0050] For example, elastic engineering plastics refer to a class of polymeric synthetic materials that have high mechanical strength and can change shape under external force and recover or partially recover their original shape when the external force is removed, such as polyamide or polycarbonate.

[0051] For example, elastic deformation during assembly means that during the process of fitting the hook 31 with the slot 223 on the volute 22, the applied external force can cause the hook 31, made of engineering plastic, to undergo temporary, recoverable bending or stretching shape changes, so that it can smoothly enter the mating position.

[0052] In this way, the one-piece molding structure significantly improves the mechanical strength and positional accuracy of the limiting component 3, avoiding errors and loosening that may occur with separate assembly, making the axial limiting more durable and reliable. At the same time, the elastic properties of the hook 31 material give the tooling a certain tolerance during assembly, reducing assembly difficulty and extreme dependence on the machining accuracy of parts, thereby improving production efficiency and assembly success rate.

[0053] Consider machining a flat mounting plate 12111 on the output shaft 1211 of the drive motor 121, and opening a non-circular mounting hole 1221 of the same shape on the drive gear 122. This mating of the flat shaft and the flat hole allows for circumferential fixation of the drive gear 122 on the output shaft 1211. This replaces traditional key connections or interference fits, essentially using the interlocking of non-circular cross-sections to transmit torque.

[0054] The output shaft 1211 of the drive motor 121 is provided with a mounting flat 12111, and the drive gear 122 is provided with a mounting hole 1221 that matches the mounting flat 12111. The drive gear 122 completes circumferential locking and limiting with the output shaft 1211 through the mounting flat 12111.

[0055] For example, mounting flat portion 12111 refers to at least one planar portion formed by cutting on the shaft end or a specific shaft segment of the output shaft 1211 of the drive motor 121, such that the cross-section of the shaft at that location is non-circular.

[0056] For example, the mounting hole 1221 that matches the mounting flat 12111 refers to a through hole opened in the center of the drive gear 122. The shape and size of the through hole are designed to fit tightly against the mounting flat 12111 portion on the output shaft 1211, so that the gear can be fitted onto the shaft and the two cannot rotate relative to each other in the circumferential direction.

[0057] For example, circumferential locking limit specifically refers to the constraint state that prevents the drive gear 122 from rotating relative to the axis of the output shaft 1211 of the drive motor 121 through the cooperation of the mounting flat 12111 and the mounting hole 1221.

[0058] For example, the mounting flat 12111 is a step formed on one side of the end face of the output shaft 1211 of the drive motor 121. The end of the drive motor 121 with the mounting flat 1211 passes through the gasket 4 and the mounting hole 1221 of the drive gear 122 in sequence and is locked and fixed with a sealing cover 5. The sealing cover 5 is directly and detachably installed with the output shaft 1211.

[0059] For example, the sealing cover 5 can be a screw, or it can be a cover structure that is threaded onto one end of the output shaft 1211 with a mounting flat 12111.

[0060] In this way, the fit between the mounting flat 12111 and the matching mounting hole 1221 eliminates the circumferential rotational clearance between the gear and the shaft, ensuring that power transmission is delayed and synchronized precisely, thereby improving the angular control accuracy of the volute 22's rotation from the source of the transmission chain. At the same time, this structure facilitates alignment and installation during assembly, improving the convenience and reliability of assembly.

[0061] Consider designing a mounting base 11 consisting of a base plate 111 and a vertical plate 112, with the drive motor 121 and drive gear 122 respectively positioned on opposite sides of the vertical plate 112. This arrangement allows the output shaft 1211 of the drive motor 121 to directly connect to the drive gear 122 on the other side through a through hole in the vertical plate 112, thereby significantly shortening the axial span of the drive assembly 12 and separating the motor mounting surface from the gear working surface, achieving a compact and modular arrangement.

[0062] The mounting base 11 includes a base plate 111 and an upright plate 112 extending upward from the base plate 111. The drive motor 121 is mounted on one side of the upright plate 112, and the drive gear 122 is located on the other side of the upright plate 112 and passes through the through hole on the upright plate 112 to be connected to the output shaft 1211 of the drive motor 121.

[0063] For example, the base plate 111 refers to the generally plate-shaped foundation part of the mounting base 11 used for fixed connection with the duct housing 2.

[0064] For example, the vertical plate 112 extending upward from the base plate 111 refers to a plate-shaped support structure that is connected to the base plate 111 and extends mainly in a direction perpendicular to the plane of the base plate 111.

[0065] For example, one side and the other side of the upright panel 112 refer to two opposite surfaces or spatial orientations with reference to the panel body of the upright panel 112.

[0066] For example, a through hole refers to a hole that penetrates the thickness of the vertical plate 112, and its location and diameter are designed to allow the output shaft 1211 of the drive motor 121 to pass through.

[0067] In this way, the base plate 111 provides a solid foundation for a stable connection with the duct housing 2, while the upright plate 112, as the core supporting component for the drive motor 121, enhances the bending rigidity of the entire mounting base 11. The layout of the motor and gear on opposite sides makes the transmission path direct and the structure compact, effectively reducing the bending deformation and transmission error caused by the long shaft system, and providing a solid structural guarantee for the precise meshing between the drive gear 122 and the volute housing 22.

[0068] The hook 31 used for axial limiting is designed to extend directly from the vertical plate 112 supporting the drive motor 121 toward the volute 22, and is explicitly positioned on both axial sides of the drive gear 122. This design allows the drive gear 122, as the core of transmission, and the hook 31, as the core of constraint, to form an integrated spatial layout based on the vertical plate 112, achieving a tight structural integration and a reasonable spatial offset between the driving and limiting functions.

[0069] The limiting component 3 includes at least one hook 31 extending from the self-standing plate 112 toward the volute 22, and the at least one hook 31 is located above or below the drive gear 122.

[0070] For example, the extension of the self-supporting plate 112 toward the volute 22 means that the root of the hook 31 is connected to the self-supporting plate 112, and its main body extends from the plate surface of the self-supporting plate 112 in a direction that generally points toward the location of the volute 22.

[0071] For example, at least one latch 31 means that the number of latches 31 can be one or more. When there are multiple latches 31, they can all be located on the same side of the drive gear 122, or they can be located above and below respectively.

[0072] For example, "above or below the drive gear 122" means that when the mounting base 11 is in its normal operating mounting posture, with reference to the rotation center axis of the drive gear 122, the hook 31 is positioned, in a direction parallel to the axis, either entirely or primarily, at a position higher or lower than the center of the drive gear 122.

[0073] In this way, the hook 31 extends directly from the upright plate 112, making its connection with the main body of the mounting base 11 more secure, the force flow is directly transmitted, and the rigidity of the limiting structure is enhanced. Arranging the hook 31 above or below the drive gear 122 can effectively utilize the space on both sides of the gear's axial direction, providing at least one proximal axial constraint for the volute 22 without affecting gear meshing, thereby optimizing space utilization and improving the reliability of the limiting function.

[0074] Considering the dual mechanical effects of the meshing relationship between the drive gear 122 and the tooth groove 221 of the volute 22, this meshing not only transmits rotational driving force, but also directly constrains the movement of the volute 22 in a plane perpendicular to its axis through the continuous contact and interaction between the gear teeth and the tooth groove wall.

[0075] The meshing of the drive gear 122 with the toothed portion 221 is also configured to restrict the displacement of the volute 22 in the direction perpendicular to its axial direction while driving the volute 22 to rotate.

[0076] For example, displacement perpendicular to its axial direction specifically refers to the translation of the geometric center or axis of the volute 22 in the direction parallel to the common normal of the meshing point of the gear and the tooth groove when it rotates, which is commonly referred to as radial offset or wobble.

[0077] For example, the configuration refers to the structure, size and relative position of the drive gear 122 and the tooth groove 221 being specially designed and arranged to achieve the two predetermined functions of driving rotation and limiting vertical axial displacement.

[0078] This gives the drive gear 122 a radial limiting function in addition to transmission. This constraint, which originates from the meshing pair itself, constitutes the first reliable barrier against radial displacement or offset of the volute 22. Combined with the hook 31 assembly specifically designed to limit axial displacement, it together achieves stable constraint on the rotation center of the volute 22 in multiple dimensions, thereby comprehensively improving the anti-deviation capability.

[0079] Consider using screw connections to reliably fix the mounting base 11 to the inside of the duct unit's upper cover 21, and optionally add a vibration damping pad between the mounting base 11 and the housing 2. The screw connection provides a robust mechanical connection, ensuring that the tooling remains in position under working loads; while the introduction of the vibration damping pad aims to isolate or attenuate the direct transmission of vibrations generated by the drive assembly 12 to the housing 2.

[0080] The mounting base 11 is installed on the inner side of the upper cover plate 21 of the housing 2 by screws; and / or, the mounting base 11 is provided with a shock-absorbing pad, which is located between the mounting base 11 and the housing 2.

[0081] For example, screw installation refers to an installation method in which a threaded fastener is passed through a hole in the mounting base 11 and screwed into a corresponding threaded hole in the housing 2, thereby fastening the two together.

[0082] For example, the inner side of the upper cover plate 21 of the housing 2 refers to the surface of the plate-like member located at the top or above in the structure of the outer housing 2 of the duct machine that faces the internal space of the machine.

[0083] For example, a shock-absorbing pad refers to a sheet-like or washer-like component made of rubber, silicone, or other elastic damping materials.

[0084] For example, the vibration damping pad being located between the mounting base 11 and the housing 2 means that the vibration damping pad is placed at the interface where the mounting base 11 contacts or is adjacent to the housing 2 of the duct unit, so that one side contacts the mounting base 11 and the other side contacts the housing 2.

[0085] This screw installation method facilitates the assembly and disassembly of the tooling while ensuring the rigidity of the connection. The shock-absorbing pad effectively absorbs and buffers the vibrations and minor impacts generated by the drive motor 121 and gear meshing, preventing them from being directly transmitted to the duct housing 2 through the mounting base 11. This helps reduce the overall operating noise and improve the durability of the components.

[0086] Consider integrating the aforementioned volute housing limiting fixture 1, which has both driving and dual limiting functions, and the volute housing 22, which is provided with a specific toothed groove 221 and a mating part 222, into the duct unit housing 2. By fixing the mounting base 11 of the fixture to the housing 2, and by engaging the drive gear 122 with the toothed groove 221 of the volute housing 22 and engaging the limiting component 3 with the mating part 222 of the volute housing 22, a complete duct unit product with a highly coordinated internal transmission and constraint mechanism can be constructed.

[0087] This disclosure also provides a duct air conditioner, which includes a housing 2, a volute 22, and the aforementioned limiting fixture 1 for the volute. The volute 22 is rotatably disposed within the housing 2, and the outer peripheral surface of the volute 22 is provided with a toothed portion 221 and a mating portion 222. The mounting base 11 of the limiting fixture 1 for the volute is mounted on the housing 2, and its drive gear 122 meshes with the toothed portion 221 of the volute 22. Its limiting component 3 is engaged with the mating portion 222 of the volute 22.

[0088] For example, housing 2 refers to the box structure that forms the outer contour of the duct machine and is used to house and support all internal components.

[0089] For example, the volute 22 being rotatably disposed within the housing 2 means that the volute 22 is installed in the internal space of the housing 2 by means of bearings, bushings or other rotating support structures, so that the volute 22 can rotate about its own set axis.

[0090] For example, the toothed portion 221 refers to a series of continuous or discontinuous grooves or protrusions machined or formed on the outer peripheral wall of the volute 22 for meshing with the teeth of the drive gear 122 to transmit torque.

[0091] For example, the mating part 222 refers to a local structure provided on the volute 22 for achieving a specific constraint fit with the limiting component 3, and the shape of the structure is adapted to the limiting component 3.

[0092] For example, mounting base 11 being mounted on housing 2 means that the mounting base 11 portion of the volute housing limiting tool 1 is fixed to the housing 2 of the duct machine by a mechanical connection.

[0093] For example, the meshing of the drive gear 122 with the tooth groove 221 of the volute 22 means that the teeth of the drive gear 122 and the corresponding tooth grooves of the tooth groove 221 of the volute 22 are interlocked and in contact, forming a gear pair connection that can transmit rotational motion and power.

[0094] For example, the engagement between the limiting component 3 and the mating part 222 of the volute 22 means that a specific part of the limiting component 3, such as the hook 31, and the mating part 222 on the volute 22, such as the slot 223, are inserted into or hooked together to form a connection state that allows relative sliding but restricts disengagement.

[0095] This results in a ducted air conditioner with high operational precision and significantly enhanced stability. The rotation of its volute 22 is directly and precisely driven by gears, and simultaneously constrained by both radial and axial forces, fundamentally eliminating the problem of the volute 22 easily deviating or shifting in traditional ducted air conditioners. This ensures accurate airflow guidance and uniform airflow, while significantly reducing operating noise and wear, and improving the overall reliability and service life of the machine.

[0096] Consider a clear spatial partitioning layout for the functional structure of the volute 22 assembly. By setting the toothed portion 221 for transmission on the radial outer circumferential surface of the volute 22, arranging the mating portion 222 for limiting on its end region, and connecting the sealing partition 23 to the volute 22, the spatial relationship of the three key functional interfaces of transmission, limiting and sealing is integrated and streamlined on a single volute 22 component.

[0097] The volute 22 also includes a sealing partition 23 connected to the volute 22, a toothed groove 221 formed on the radial outer peripheral surface of the volute 22, and a mating part 222 formed on the end face or side wall near the end face of the volute 22.

[0098] For example, the sealing partition 23 refers to a plate-shaped component connected to the volute 22, whose main function is to close or separate the airflow passage to prevent air leakage.

[0099] For example, the radial outer circumferential surface refers to the annular curved surface region on the outer surface of the volute 22 that extends along its circumferential direction and is away from its rotational central axis.

[0100] For example, the end face refers to the surface of the two ends of the volute 22 along its own axial direction.

[0101] For example, the sidewall near the end face refers to a local area adjacent to one end face in the cylindrical or curved outer shell portion of the volute 22 that connects its two end faces.

[0102] In this way, the toothed portion 221, located on the radial outer circumference, is most convenient for forming an efficient meshing transmission with the drive gear 122; the mating portion 222 is located on the end face or adjacent to the side wall, making the point of application of the axial limiting force more direct, which is conducive to forming a stable constraint pair with the hook 31; and the connection of the sealing partition 23 ensures the airtightness of the duct system. This partitioned layout allows the functional elements to work together without interference, jointly improving the working efficiency and reliability of the volute 22 assembly and even the entire duct unit.

[0103] Consider designing the mating part 222 on the volute 22 as a special arc-shaped groove 223, and ensuring that the geometric center of the arc-shaped groove 223 precisely coincides with the rotation center of the volute 22 itself. This geometric relationship makes the arc trajectory of the groove 223 completely consistent with the motion trajectory of the corresponding point on the volute 22 when it rotates.

[0104] Among them, the mating part 222 is an arc-shaped groove 223 formed on the volute 22, and the center of the arc-shaped groove 223 coincides with the rotation center of the volute 22.

[0105] For example, the arc-shaped slot 223 refers to a groove structure whose extension path is a circular arc.

[0106] For example, the center of the arc-shaped slot 223 refers to the center point of the circle that forms the arc of the arc-shaped slot 223.

[0107] For example, the rotation center of the volute 22 refers to the fixed axis around which the volute 22 rotates within the duct housing 2.

[0108] For example, coincidence means that the center of the arc-shaped slot 223 and the rotation center axis of the volute 22 are completely or nearly completely aligned in space.

[0109] In this way, when the hook 31 slides within the arc-shaped groove 223, the direction of the interaction force between the hook 31 and the side wall of the groove 223 is always along the radial direction of the volute 22, thus avoiding tangential additional force or interference caused by trajectory mismatch. This ensures that the axial limiting action is extremely smooth and stable throughout the entire rotation process, minimizing sliding friction and wear, and making the limiting function more accurate and reliable.

[0110] Consider adding an independent control unit to the duct air conditioning system that includes the volute housing limit fixture 1, and establishing an electrical connection between this control unit and the drive motor 121. This elevates the control of the volute housing 22's rotational motion from the traditional mechanical drive level to the programmable electronic control level, precisely directing the action of the drive motor 121 through electrical signals.

[0111] The duct unit also includes a control unit, which is electrically connected to the drive motor 121 of the volute limiting fixture 1, and is used to control the start, stop and rotation angle of the drive motor 121.

[0112] For example, a control unit refers to an electronic device or circuit module that can receive instructions, process signals and output control commands.

[0113] For example, an electrical connection refers to the electrical conduction relationship established between the control unit and the drive motor 121 through wires, cables or circuit board wiring, so that electrical signals or electrical energy can be transmitted between the two.

[0114] For example, controlling the start and stop of the drive motor 121 means that the control unit can output a signal to command the drive motor 121 to start or stop operating.

[0115] For example, controlling the rotation angle of the drive motor 121 means that the control unit can control the amount of rotation of the output shaft 1211 of the drive motor 121 so that it stops precisely at a certain preset circumferential position.

[0116] In this way, the control unit can achieve digital and programmed control of the start, stop, and rotation angle of the drive motor 121. This allows the duct air conditioner to automatically and accurately control the volute 22 to rotate to a predetermined angle according to different operating mode requirements, thereby realizing the automation and intelligence of airflow direction switching, greatly improving the ease of operation of the duct air conditioner, the accuracy of air supply mode switching, and the overall control level of the equipment.

[0117] To better understand the volute housing limiting fixture 1 and the duct air conditioner solution provided in this disclosure, the following exemplary description is provided: The limiting fixture 1 for the volute housing provided in this embodiment is mainly used to solve the problem that the volute housing 22 is prone to deviation in different directions during rotation. By directly assembling the drive device with the volute housing 22 and using the limiting structure, the drive gap is eliminated while preventing the volute housing 22 from running off course or shifting during rotation, thereby enhancing the overall rotation accuracy and improving the stability and service life of the equipment.

[0118] It should be noted that directly assembling the drive unit with the volute 22 greatly reduces the synchronization error between the two and achieves precise control; the drive unit and the volute 22 form a gear connection, which restricts the displacement of the volute 22 in some directions while realizing the drive function; the device adds a slot 223 limiting structure to restrict the displacement of the volute 22 in other directions, realizes the all-round limiting of the volute 22, greatly improves the rotational running accuracy of the volute 22, and thus improves the operating stability of the equipment.

[0119] Specifically, the duct air conditioner with a limiting fixture 1 for a volute provided in this embodiment includes at least a housing 2, a volute 22 assembly, and a limiting drive device. The housing 2 is used to fix and support other components; the volute 22 assembly consists of a sealing partition 23 and a volute 22, which are fixedly connected. Figure 5 The limit drive device includes a mounting base 11, a drive motor 121, gears, and screws. The mounting base 11 is fixed to the housing 2 with screws, serving to support and position the drive motor 121 and gears; it also has a slot 223 structure on its surface for limiting the movement of the volute housing 22. In actual assembly, the hook 31 is first engaged into the corresponding slot 223 on the volute housing 22, then the motor is installed and fixed. The motor shaft has a mounting flat 12111 to ensure synchronous rotation of the parts on the shaft; subsequently, the gears and screws are installed sequentially, and the entire device is assembled. Figure 2 and 3Finally, the assembly process is completed by fixing the device to the upper cover plate 21 with screws. At this time, the protruding toothed groove on the surface of the upper volute 22A meshes with the gear of the drive device to achieve positioning of the volute 22. According to the actual structural composition of the volute assembly, it includes not only the upper volute 22A but also the lower volute 22B. When the motor runs, the drive gear 122 rotates, driving the toothed groove, which in turn drives the volute 22 to rotate. During the rotation, the volute 22 may shift left and right. At this time, the hook 31 structure of the device will limit the displacement of the volute 22 in the left and right directions to prevent large displacement.

[0120] In addition, all contact surfaces should be coated with silicone grease or similar lubricant for smoothing, to extend service life and reduce operating noise. The diameter and number of teeth of the gears can be adjusted according to parameters such as drive stroke and drive torque to ensure good drive performance. At the same time, the trajectory of the tooth grooves of the volute 22 should be precisely designed according to the rotation trajectory of the volute 22 to avoid limit failure or interference due to improper installation.

[0121] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0122] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0123] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A limiting fixture for a volute housing, applied to a duct air conditioner, the duct air conditioner comprising a housing and a volute housing installed within the housing, characterized in that, The limiting fixture for the volute is used to drive and limit the displacement of the volute during rotation. The limiting fixture for the volute includes: Mounting base, installed on the housing; A drive assembly is mounted on the mounting base. The drive assembly includes a drive motor and a drive gear connected to the output shaft of the drive motor. The drive gear is configured to mesh with a toothed portion on the outer peripheral surface of the volute to drive the volute to rotate. A limiting component is disposed on the mounting base, the limiting component being configured to engage with a mating portion on the volute to limit the displacement of the volute along its axial direction.

2. The limiting fixture for the volute casing according to claim 1, characterized in that, The limiting component includes a hook disposed on the mounting base, the hook being configured to extend into a slot on the volute, and a gap between the hook and the slot allowing the volute to rotate.

3. The limiting fixture for the volute casing according to claim 2, characterized in that, The slot is an arc-shaped groove extending along the rotation direction of the volute, and the end of the hook is located in the arc-shaped groove and can slide along the arc-shaped groove.

4. The limiting fixture for the volute casing according to claim 2, characterized in that, The hook is integrally formed with the mounting base; and / or the hook is made of an elastic engineering plastic to allow elastic deformation during assembly.

5. The limiting fixture for the volute casing according to claim 1, characterized in that, The output shaft of the drive motor is provided with a mounting flat part, and the drive gear is provided with a mounting hole that matches the mounting flat part. The drive gear completes circumferential locking and limiting with the output shaft through the mounting flat part.

6. The limiting fixture for the volute casing according to claim 1, characterized in that, The mounting base includes a base plate and an upright plate extending upward from the base plate. The drive motor is mounted on one side of the upright plate, and the drive gear is located on the other side of the upright plate and passes through a through hole in the upright plate to connect with the output shaft of the drive motor.

7. The limiting fixture for the volute casing according to claim 6, characterized in that, The limiting component includes at least one hook extending from the upright plate toward the volute, the at least one hook being located above or below the drive gear.

8. The limiting fixture for the volute casing according to claim 1, characterized in that, The engagement of the drive gear with the toothed portion is also configured to restrict the displacement of the volute in a direction perpendicular to its axial direction while driving the volute to rotate.

9. The limiting fixture for the volute casing according to claim 1, characterized in that, The mounting base is installed on the inner side of the upper cover plate of the housing by screws; and / or, the mounting base is provided with a shock-absorbing pad, which is located between the mounting base and the housing.

10. A ducted air conditioner, characterized in that, include: case; A volute is rotatably disposed within the housing, and the outer peripheral surface of the volute is provided with a toothed groove and a mating part; The volute housing limiting fixture as described in any one of claims 1-9, wherein the mounting base of the volute housing limiting fixture is mounted on the housing, its drive gear meshes with the toothed portion of the volute housing, and its limiting component engages with the mating portion of the volute housing.

11. The duct air conditioner according to claim 10, characterized in that, The volute also includes a sealing partition connected to the volute, the toothed portion is formed on the radial outer peripheral surface of the volute, and the mating portion is formed on the end face or the side wall near the end face of the volute.

12. The duct air conditioner according to claim 10, characterized in that, The mating part is an arc-shaped groove formed on the volute, and the center of the arc-shaped groove coincides with the rotation center of the volute.

13. The duct air conditioner according to claim 10, characterized in that, The duct unit also includes a control unit, which is electrically connected to the drive motor of the volute housing using a limiting fixture, and is used to control the start, stop and rotation angle of the drive motor.

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