A heating, ventilation and air conditioning (HVAC) system and an air volume adjustment device for its air outlet

Abstract

A heating, ventilation and air conditioning (HVAC) system and an air volume regulating device for its air outlet, which relate to the technical field of air conditioning equipment. The aforementioned air volume regulating device for the air outlet includes an air outlet pipe, in which an air volume regulating mechanism is provided. A dust-proof net is provided at the rear end of the air outlet pipe, and a cleaning device capable of cleaning its surface is provided on the dust-proof net. A rotating ring capable of rotating forward and backward is sleeved on the air outlet pipe. The rotating ring can cooperate with the cleaning device and the air volume regulating mechanism respectively when rotating forward and backward, and drive the cleaning device to clean the dust-proof net and drive the air volume regulating mechanism to regulate the air volume of the air outlet respectively. The above-mentioned air volume regulating device for the air outlet of the HVAC system can clean the dust-proof net without detaching it from the air outlet pipe, with simple operation steps, relatively simple required circuits and control systems, and only a single motor is needed to control the air volume and clean the dust-proof net in practical applications, thus reducing the waste of motor equipment and saving costs.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and particularly to a heating, ventilation and air conditioning (HVAC) and an air outlet air volume regulating device thereof. Background Art

[0002] HVAC can realize the regulation of the indoor environmental temperature. However, the air volume delivered by the air outlet of the existing HVAC is often fixed, and the air volume cannot be adjusted, making it difficult to keep the indoor temperature stable within the set temperature range. Chinese invention patent CN114659253B provides an air outlet air volume regulating device for HVAC. Through the cooperation of a power mechanism and a sealing mechanism, this device further realizes the adjustment of the wind direction, and at the same time can clean the single-layer net and prevent blockage. However, this device needs to separate the filter screen from the cavity to clean the filter screen, requiring more steps, with a relatively complex circuit and control system. And since the filter screen needs to be controlled by a separate motor, it is impossible to integrally control the air volume and clean the filter screen with a single motor. The filter screen does not need to be cleaned frequently, which causes waste of motor equipment and a relatively high cost. Summary of the Invention

[0003] One of the purposes of the present invention is to provide an air outlet air volume regulating device for HVAC, which can clean the dust-proof net without detaching it from the air duct, with simple operation steps, a relatively simple required circuit and control system, and only a single motor can be used in practical applications to control the air volume and clean the dust-proof net, thus reducing the waste of motor equipment and saving costs.

[0004] To achieve the above invention purpose, the present invention adopts the following technical solution: An air outlet air volume regulating device for HVAC, including an air duct, wherein an air volume regulating mechanism is provided in the air duct, a dust-proof net is provided at the rear end of the air duct, a cleaning device for cleaning the surface of the dust-proof net is provided on the dust-proof net, a rotating ring capable of rotating forward and backward is sleeved on the air duct, and the rotating ring can cooperate with the cleaning device and the air volume regulating mechanism respectively when rotating forward and backward, and drive the cleaning device to clean the dust-proof net and drive the air volume regulating mechanism to adjust the air volume of the air outlet respectively.

[0005] Further, a rotating groove is provided on the outer wall of the air outlet pipe and extends around it. A wind volume adjustment groove is provided on the front side of the rotating groove. The wind volume adjustment groove includes a connecting section that is inclined with respect to the axis of the air outlet pipe and is connected to the rotating groove, and a sliding section that is parallel to the rotating groove. A limiting slider is provided on the inner wall of the rotating ring. The limiting slider is slidably installed in the rotating groove. The limiting slider can perform a circular motion along the rotating groove when the rotating ring rotates forward, and the rotating ring cooperates with the cleaning device to drive the cleaning device to clean the dust screen. When the rotating ring rotates reversely, the limiting slider can enter the sliding section through the connecting section of the wind volume adjustment groove, causing the rotating ring to displace forward relative to the air outlet pipe by a certain distance and disengage from the cleaning device, and cooperate with the wind volume adjustment mechanism. Thus, when the limiting slider slides in the sliding section of the wind volume adjustment groove, it drives the wind volume adjustment mechanism to adjust the air volume at the air outlet.

[0006] Further, a second rotating groove is provided on the inner wall of the rotating ring and extends around it. A second wind volume adjustment groove is provided on the rear side of the second rotating groove. The second wind volume adjustment groove includes a second connecting section that is inclined with respect to the axis of the rotating ring and is connected to the second rotating groove, and a second sliding section that is parallel to the second rotating groove. A second limiting slider is provided on the outer wall of the air outlet pipe. The second limiting slider is slidably installed in the second rotating groove. The second limiting slider can perform a circular motion along the second rotating groove when the rotating ring rotates forward, and the rotating ring cooperates with the cleaning device to drive the cleaning device to clean the dust screen. When the rotating ring rotates reversely, the second limiting slider can enter the second sliding section through the second connecting section of the second wind volume adjustment groove, causing the rotating ring to displace forward relative to the air outlet pipe by a certain distance and disengage from the cleaning device, and cooperate with the wind volume adjustment mechanism. Thus, when the second limiting slider slides in the second sliding section of the second wind volume adjustment groove, it drives the wind volume adjustment mechanism to adjust the air volume at the air outlet.

[0007] Further, the cleaning device includes a cleaning rod that is horizontally arranged on the surface of the dust screen and can rotate around the axis of the dust screen. The cleaning rod is in contact with the surface of the dust screen. A limiting hanging plate is provided on the rear side of the rotating ring. The limiting hanging plate can abut against the end of the cleaning rod when the rotating ring rotates forward to drive the cleaning rod to rotate on the surface of the dust screen, thereby cleaning the dust screen.

[0008] Further, the air volume adjusting mechanism includes a connecting shaft radially arranged in the air outlet pipe and capable of rotating around its own axis. The number of the connecting shafts is multiple and they are annularly and spacedly distributed in the air outlet pipe. An adjusting plate is provided on the connecting shaft. The adjusting plate can rotate together with the connecting shaft, and two adjacent adjusting plates can abut against or separate from each other under the action of the rotation of the connecting shaft. One end of the connecting shaft extends out of the air outlet pipe and is provided with an adjusting gear. A first gear ring is provided on the front side of the rotating ring. A limiting component is provided on the air outlet pipe. The first gear ring can be disengaged from and away from the adjusting gear or approach and engage with the adjusting gear under the action of the limiting component when the rotating ring rotates forward or backward.

[0009] Further, the limiting component includes a second gear ring sleeved on the air outlet pipe and sliding rods annularly and spacedly distributed on the second gear ring. A connecting ring is provided on the rotating ring. A fixing rod is provided on the air outlet pipe. The interior of the fixing rod is hollow and a spring is provided in its hollow part. The fixing rod is provided with a strip-shaped opening on its side wall close to the second gear ring. The second gear ring is connected to the sliding rod through a connecting rod passing through the strip-shaped opening. One end of the sliding rod extends into the hollow part of the fixing rod and is connected to the spring, and the other end is connected to the connecting ring through two limiting members. The connecting ring is located between the two limiting members and can slide therein. The adjusting gear is located between the first gear ring and the second gear ring and can engage with the second gear ring to limit the self-rotation of the adjusting gear when the rotating ring rotates forward, and disengage from the second gear ring and engage with the first gear ring to rotate under the drive of the rotating ring when the rotating ring rotates backward.

[0010] Further, a wind guiding plate is provided at the front end of the air outlet pipe, and the wind guiding plate includes a plurality of straight plates parallel to the axial direction of the air outlet pipe.

[0011] Further, a mounting seat is rotatably connected to the middle of the dust-proof net. A first bevel gear surrounding it is provided outside the mounting seat. The cleaning rod is movably installed in the mounting seat, and the first bevel gear meshes with a second bevel gear provided on the cleaning rod, so that when the cleaning rod rotates around the axis of the dust-proof net, the cleaning rod can rotate around its own axis under the action of the first bevel gear and the second bevel gear.

[0012] Further, an outer ring gear is provided on the rotating ring. The outer ring gear is meshed with a transmission gear, and the transmission gear is connected to a motor for driving its rotation.

[0013] The second object of the present invention is to provide a heating, ventilation and air conditioning (HVAC) system, which includes an air conditioner body and an end air box connected thereto. The above-mentioned air volume adjusting device for the air outlet of the HVAC system is provided in the end air box.

[0014] The above-mentioned air volume adjustment device for HVAC outlets can clean the dust-proof net without detaching it from the air duct. Moreover, by the forward and reverse rotation of the rotating ring to cooperate with the mechanism for controlling the air volume and cleaning the dust-proof net, the operation steps are simplified. At the same time, the control method of the forward and reverse rotation of the rotating ring is relatively simple, so the required circuit and control system are also relatively simple. And in actual application, only a single motor can be used to control the forward and reverse rotation of the rotating ring, thereby controlling the air volume and cleaning the dust-proof net, which can reduce the waste of motor equipment and save costs. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the end air box;

[0016] Figure 2 is a schematic diagram of the internal structure of the end air box;

[0017] Figure 3 is a schematic structural diagram of the outer ring gear and the transmission gear;

[0018] Figure 4 is a schematic diagram of the internal structure of the air duct;

[0019] Figure 5 is a schematic structural diagram of the air volume adjustment mechanism;

[0020] Figure 6 is a schematic structural diagram of the rotating ring and the limiting component;

[0021] Figure 7 is Figure 6 an enlarged schematic diagram of part A in

[0022] Figure 8 is a schematic diagram of the structural disassembly of the limiting component;

[0023] Figure 9 is a schematic diagram of the structural disassembly of the rotating ring;

[0024] Figure 10 is a schematic structural diagram of the cleaning rod and the dust-proof net.

[0025] In the figure:

[0026] 1 - air duct 1a - rotating groove 1b - air volume adjustment groove

[0027] 1b1 - connecting section 1b2 - sliding section 2 - air volume adjustment mechanism

[0028] 2a - connecting shaft 2b - adjusting plate 2c - adjusting gear

[0029] 3 - dust-proof net 4 - rotating ring 4a - limiting slider

[0030] 5 - cleaning rod 5a - rod part 5b - brush bristles

[0031] 6 - Limit hanging plate 7 - First gear ring 8 - Limit assembly

[0032] 8a - Second gear ring 8b - Slide rod 8c - Connecting ring

[0033] 8d - Fixed rod 8e - Spring 8d1 - Strip-shaped opening

[0034] 8f - Connecting rod 8h - Limiting piece 9 - Air guide plate

[0035] 9a - Straight plate 9b - Arc-shaped plate 10 - Mounting seat

[0036] 11 - First bevel gear 12 - Second bevel gear 13 - Outer ring gear

[0037] 14 - Transmission gear 15 - Motor 16 - End air box

[0038] 17 - Louver board 18 - Connecting pipe 19 - Shaft rod. Detailed implementation mode

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The term "plurality" means two or more (including two).

[0040] For the convenience of those skilled in the art to understand, the present invention will be further described below in conjunction with embodiments and the drawings. The content mentioned in the implementation mode is not a limitation to the present invention.

[0041] Such as Figures 1 to 10As shown in the figure, a device for adjusting the air volume of a HVAC air outlet includes an air outlet pipe 1. An air volume adjusting mechanism 2 is provided in the air outlet pipe 1. A dust-proof net 3 is provided at the rear end of the air outlet pipe 1. A cleaning device for cleaning the surface of the dust-proof net 3 is provided on the dust-proof net 3. A rotating ring 4 that can rotate forward and backward is sleeved on the air outlet pipe 1. The rotating ring 4 can cooperate with the cleaning device and the air volume adjusting mechanism 2 respectively when it rotates forward and backward, and drive the cleaning device to clean the dust-proof net 3 and drive the air volume adjusting mechanism 2 to adjust the air volume of the air outlet respectively. Among them, a wind guiding plate 9 is provided at the front end of the air outlet pipe 1, which can guide the air flow and make the air flow move in a straight line. The wind guiding plate 9 may include straight plates 9a distributed at annular intervals and arc-shaped plates 9b connected between the straight plates 9a. The end faces of the straight plates 9a and the arc-shaped plates 9b are both parallel to the axial direction of the air outlet pipe 1, so that the air flow can move in a straight line along the axial direction parallel to the air outlet pipe 1 under the action of the straight plates 9a and the arc-shaped plates 9b. The arc-shaped plates 9b can also reinforce the straight plates 9a. Among them, the wind guiding plate 9 can be fixed or rotatable in the air outlet pipe 1. In order to realize the forward and backward rotation of the rotating ring 4, an outer ring gear 13 can be provided on the rotating ring 4. The outer ring gear 13 is meshed with a transmission gear 14, and the transmission gear 14 is connected with a motor 15 for driving its rotation. The single motor 15 can cooperate with the cleaning device and the air volume adjusting mechanism 2 respectively by controlling the forward and backward rotation of the rotating ring 4, so as to realize the cleaning of the dust-proof net 3 and the adjustment of the air volume of the air outlet, effectively improving the defect that a separate motor needs to be configured for the device for cleaning the dust-proof net 3 in the prior art, reducing the waste of motor equipment and saving the equipment cost. It should be noted that the thickness of the transmission gear 14 can be less than the thickness of the outer ring gear 13, so that when the transmission gear 14 drives the outer ring gear 13 to rotate, the outer ring gear 13 can drive the rotating ring 4 to translate a certain distance.

[0042] Among them, the air outlet pipe 1 and the rotating ring 4 can be connected in the following two ways, so as to realize the change of the relative position between the air outlet pipe 1 and the rotating ring 4 when the rotating ring 4 rotates forward and backward, and the cooperation between the rotating ring 4 and the cleaning device and the air volume adjusting mechanism 2.

[0043] The first way: As Figure 9As shown in the figure, a rotating groove 1a is provided on the outer wall of the air outlet pipe 1 around its circumference, and an air volume adjustment groove 1b is provided on the front side of the rotating groove 1a. The air volume adjustment groove 1b includes a connecting section 1b1 that is inclined with respect to the axis of the air outlet pipe 1 and is connected to the rotating groove 1a, and a sliding section 1b2 that is parallel to the rotating groove 1a. The connecting section 1b1 can also be approximately regarded as the bent part of the air volume adjustment groove 1b. A limiting slider 4a is provided on the inner wall of the rotating ring 4, and the limiting slider 4a can be slidably installed in the rotating groove 1a. The limiting slider 4a can move in a circular motion along the rotating groove 1a when the rotating ring 4 rotates forward, and the rotating ring 4 can cooperate with the cleaning device to drive the cleaning device to clean the dust screen 3; when the rotating ring 4 rotates backward, the limiting slider 4a can enter the sliding section 1b2 through the connecting section 1b1 of the air volume adjustment groove 1b, so that the rotating ring 4 moves forward a certain distance relative to the air outlet pipe 1 to disengage from the cleaning device and cooperate with the air volume adjustment mechanism 2, so that when the limiting slider 4a slides in the sliding section 1b2 of the air volume adjustment groove 1b, the air volume adjustment mechanism 2 is driven to adjust the air volume at the air outlet.

[0044] The second method (not shown in the figure): A second rotating groove is provided on the inner wall of the rotating ring 4 around its circumference, and a second air volume adjustment groove is provided on the rear side of the second rotating groove. The second air volume adjustment groove includes a second connecting section that is inclined with respect to the axis of the rotating ring 4 and is connected to the second rotating groove, and a second sliding section that is parallel to the second rotating groove. A second limiting slider is provided on the outer wall of the air outlet pipe 1, and the second limiting slider can be slidably installed in the second rotating groove. The second limiting slider can move in a circular motion along the second rotating groove when the rotating ring 4 rotates forward, and the rotating ring 4 can cooperate with the cleaning device to drive the cleaning device to clean the dust screen 3; when the rotating ring 4 rotates backward, the second limiting slider can enter the second sliding section through the second connecting section of the second air volume adjustment groove, so that the rotating ring 4 moves forward a certain distance relative to the air outlet pipe 1 to disengage from the cleaning device and cooperate with the air volume adjustment mechanism 2, so that when the second limiting slider slides in the second sliding section of the second air volume adjustment groove, the air volume adjustment mechanism 2 is driven to adjust the air volume at the air outlet.

[0045] It should be noted that the structures and principles of the above two methods are similar, and both can achieve a relative displacement of the rotating ring 4 relative to the air outlet pipe 1 when the rotating ring 4 rotates in the reverse direction, and can realize the separate cooperation between the rotating ring 4 and the cleaning device and the air volume adjustment mechanism 2 when the rotating ring 4 rotates forward and backward. In this embodiment, the first method is taken as an example for specific description.

[0046] Regarding the cleaning device, such as Figure 10As shown in the figure, it includes a cleaning rod 5 horizontally arranged on the surface of the dust-proof net 3 and capable of rotating around the axis of the dust-proof net 3. The cleaning rod 5 is in contact with the surface of the dust-proof net 3. A limiting hanging plate 6 is arranged at the rear side of the rotating ring 4. The limiting hanging plate 6 can resist the end of the cleaning rod 5 when the rotating ring 4 rotates forward to drive the cleaning rod 5 to rotate on the surface of the dust-proof net 3, so as to clean the dust-proof net 3. Among them, the cleaning rod 5 can extend beyond the dust-proof net 3 at both ends, that is, both ends of the cleaning rod 5 can cooperate with the limiting hanging plate 6, or only one end can exceed the dust-proof net 3, that is, only one end of the cleaning rod 5 can cooperate with the limiting hanging plate 6. Both structures can realize the cleaning of the surface of the dust-proof net 3. Of course, relatively speaking, the cleaning efficiency of the former structure is higher. In addition, in order to increase the cleaning ability of the cleaning rod 5, the cleaning rod 5 can include a rod part 5a and bristles 5b arranged on the rod part 5a of the cleaning rod 5. The bristles 5b are in contact with the surface of the dust-proof net 3. Among them, the axis of the cleaning rod 5 is parallel to the surface of the dust-proof net 3, that is, the axis of the rod part 5a is parallel to the surface of the dust-proof net 3.

[0047] When the cleaning rod 5 cleans the surface of the dust-proof net 3, the cleaning rod 5 can only revolve around the axis of the dust-proof net 3, or can also rotate around its own axis at the same time. For example, as Figure 10 shown, a mounting seat 10 is rotatably connected in the middle of the dust-proof net 3. A first bevel gear 11 surrounding the mounting seat 10 is arranged outside the mounting seat 10. The cleaning rod 5 is movably installed in the mounting seat 10, and the first bevel gear 11 meshes with a second bevel gear 12 arranged on the cleaning rod 5, so that when the cleaning rod 5 rotates around the axis of the dust-proof net 3, the cleaning rod 5 can rotate around its own axis under the action of the first bevel gear 11 and the second bevel gear 12, so as to enhance the cleaning effect on the dust-proof net 3. It should be noted that the structure of the cleaning rod 5 in this embodiment is that both ends of it can cooperate with the limiting hanging plate 6. The middle part of the cleaning rod 5 passes through the mounting seat 10 and is installed on the mounting seat 10 through a bearing, so that the cleaning rod 5 can rotate around its own axis on the mounting seat 10, and the mounting seat 10 can be movably installed on a shaft rod 19 passing through the dust-proof net 3, so that the cleaning rod 5 can be driven by the limiting hanging plate 6 to rotate around the axis of the shaft rod 19 (the same as the axis of the dust-proof net 3). At the same time, the first bevel gear 11 remains stationary, and the second bevel gear 12 moves with the cleaning rod 5, so as to drive the cleaning rod 5 to rotate around its own axis.

[0048] For the air volume regulating mechanism 2, as Figure 4 、 5As shown in the figure, it includes a connecting shaft 2a that is radially arranged in the air outlet pipe 1 and can rotate around its own axis. The number of connecting shafts 2a is multiple and they are annularly and spacedly distributed in the air outlet pipe 1. The connecting shafts 2a can be evenly distributed at annular intervals. An adjusting plate 2b is provided on the connecting shaft 2a. The shape of the adjusting plate 2b can be fan-shaped. The adjusting plate 2b can rotate together with the connecting shaft 2a, and two adjacent adjusting plates 2b can abut against or separate from each other under the rotation of the connecting shaft 2a. One end of the connecting shaft 2a extends outside the air outlet pipe 1 and is provided with an adjusting gear 2c. A first gear ring 7 is provided on the front side of the rotating ring 4. A limiting component 8 is provided on the air outlet pipe 1. When the rotating ring 4 rotates forward or backward, the first gear ring 7 can be disengaged from and move away from the adjusting gear 2c or approach and engage with the adjusting gear 2c under the action of the limiting component 8. When two adjacent adjusting plates 2b are in contact with each other, a closed space is formed inside the air outlet pipe 1. When the multiple adjusting plates 2b rotate, a gap is generated between two adjacent adjusting plates 2b during rotation, facilitating the flow of air in the air outlet pipe 1. It should be noted that the air outlet pipe 1 is installed in the end air box 16. When the rotation angle of the adjusting plate 2b is less than 90°, the output air flow will flow in a spiral shape when passing through the adjusting plate 2b. The air guiding plate 9 can guide the air flow so that it moves smoothly along a straight line, avoiding vibration and noise caused by the impact of the air flow on the inner wall of the end air box 16.

[0049] Among them, as Figures 6 to 8As shown in the figure, the limiting component 8 includes a second gear ring 8a sleeved on the air outlet pipe 1 and sliding rods 8b annularly and spacedly distributed on the second gear ring 8a. The second gear ring 8a can slide back and forth on the air outlet pipe 1. A connecting ring 8c is provided on the rotating ring 4, and a fixing rod 8d is provided on the air outlet pipe 1. The interior of the fixing rod 8d is hollow and a spring 8e is provided in its hollow part. The fixing rod 8d is provided with a strip-shaped opening 8d1 on its side wall close to the second gear ring 8a. The second gear ring 8a is connected to the sliding rod 8b through a connecting rod 8f passing through the strip-shaped opening 8d1. One end of the sliding rod 8b extends into the hollow part of the fixing rod 8d and is connected to the spring 8e, and the other end is connected to the connecting ring 8c through two limiting members 8h. The two ends of the spring 8e are fixedly connected to the fixing rod 8d and the sliding rod 8b respectively. The connecting ring 8c is located between the two limiting members 8h and can slide therein. The adjusting gear 2c is located between the first gear ring 7 and the second gear ring 8a and can mesh with the second gear ring 8a when the rotating ring 4 rotates forward to limit the self-rotation of the adjusting gear 2c, and disengages from the second gear ring 8a and meshes with the first gear ring 7 when the rotating ring 4 rotates backward to rotate under the drive of the rotating ring 4. The limiting member 8h can be a limiting guide wheel, and the limiting guide wheel is in rolling contact with the connecting ring 8c fixedly connected to the rotating ring 4, which can reduce the interference caused to the rotation of the rotating ring 4 and make its rotation smoother. When the rotating ring 4 rotates forward, the limiting slider 4a cooperates with the rotating groove 1a, so that the limiting hanging plate 6 cooperates with both ends of the cleaning rod 5 to drive the cleaning rod 5 to rotate, and the dust-proof net 3 can be cleaned. When the rotating ring 4 rotates backward, the limiting slider 4a cooperates with the air volume adjusting groove 1b, so that the first gear ring 7 cooperates with the adjusting gear 2c to drive the adjusting plate 2b to rotate, and it rotates and unfolds, so that the angles of the plurality of adjusting plates 2b change, thereby realizing the adjustment of the air volume output.

[0050] The working principle of the above air volume adjusting device for the HVAC air outlet is as follows:

[0051] When the air volume needs to be adjusted, the motor 15 drives the transmission gear 14 to rotate clockwise, and the outer ring gear 13 drives the rotating ring 4 to rotate counterclockwise. Since the spring 8e pulls the sliding rod 8b, the limiting guide wheel cooperates with the connecting ring 8c to pull the rotating ring 4. When the limiting slider 4a moves to the connecting section 1b1 of the air volume adjusting groove 1b, the pulling force of the spring 8e causes the limiting slider 4a to slide into the sliding section 1b2 of the air volume adjusting groove 1b. The rotating ring 4 displaces a certain distance on the air outlet pipe 1, and the first gear ring 7 contacts the adjusting gear 2c and drives it to rotate, so that the plurality of adjusting plates 2b rotate synchronously, realizing the adjustment of the air volume output. When the rotation angle of the adjusting plate 2b is less than 90°, the air deflector 9 can guide the air flow so that it moves smoothly along a straight line, avoiding the vibration and noise generated by the impact of the air flow on the inner wall of the end air box 16.

[0052] When the dust screen 3 needs to be cleaned, the motor 15 drives the rotating ring 4 to rotate clockwise. When the limit slider 4a cooperates with the connecting section 1b1 of the air volume adjustment groove 1b, the limit slider 4a slides into the rotating groove 1a, so that the rotating ring 4 is displaced in the opposite direction on the air outlet pipe 1 for a certain distance. At this time, the limit hanging plate 6 contacts the end of the cleaning rod 5, driving the cleaning rod 5 to rotate around the axis of the dust screen 3 as the axis. At the same time, the second bevel gear 12 is meshed with the first bevel gear 11, so that the cleaning rod 5 rotates around its own axis, so that the cleaning rod 5 can efficiently clean the dust screen 3.

[0053] In summary, in this embodiment, the motor 15 cooperates with the transmission gear 14 to drive the rotating ring 4 to rotate forward and reverse. When the rotating ring 4 rotates forward, the limit slider 4a cooperates with the rotating groove 1a, so that the limit hanging plate 6 cooperates with the two ends of the cleaning rod 5 to drive the cleaning rod 5 to rotate, and the dustproof net 3 can be cleaned. When the rotating ring 4 rotates reversely, the limit slider 4a cooperates with the air volume adjustment groove 1b, so that the first gear ring 7 cooperates with the adjustment gear 2c to drive the adjustment plate 2b to rotate, so that the angles of multiple adjustment plates 2b are changed to achieve the adjustment of the air volume. The device of this embodiment has a compact structure, not only has a low cost, but also occupies a small space, is easy to install, and has good practicality.

[0054] Moreover, in this embodiment, when the limiting hanging plate 6 drives the cleaning rod 5 to rotate around the axis of the dustproof net 3, the second bevel gear 12 on the cleaning rod 5 engages with the first bevel gear 11 to make the cleaning rod 5 rotate around its own axis, thereby enhancing the cleaning effect of the dustproof net 3.

[0055] In addition, in this embodiment, when multiple adjustment plates 2b are rotated to any angle, the adjustment plates 2b cooperate with the air guide plates 9 to make the rotating airflow tend to a smooth linear motion, avoiding the airflow flowing freely in the terminal bellows 16 to generate a lot of noise, reducing the operating vibration of the equipment while improving the comfort of the indoor environment.

[0056] In addition, the above-mentioned HVAC air outlet air volume adjustment device can clean the dust screen 3 without separating it from the air outlet duct 1, and the mechanism for controlling the air volume and cleaning the dust screen 3 is coordinated by the forward and reverse rotation of the rotating ring 4, which simplifies the operation steps. At the same time, the control method of the forward and reverse rotation of the rotating ring 4 is relatively simple, so the required circuit and control system are also relatively simple, and only a single motor 15 is used to control the forward and reverse rotation of the rotating ring 4, thereby achieving the purpose of controlling the air volume and cleaning the dust screen 3 by a single motor, which can reduce the waste of motor equipment and save costs.

[0057] Moreover, this embodiment also provides a heating, ventilation and air conditioning (HVAC) system, which includes an air conditioner body and an end air box 16 connected thereto. The above-mentioned air volume regulating device for the HVAC air outlet is provided in the end air box 16. Among them, the air outlet pipe 1 is fixed in the end air box 16, the motor 15 is fixed in the end air box 16, a louver 17 with adjustable angle is provided on the front side of the end air box 16, a connecting pipe 18 is provided on the rear side of the end air box 16, and the air conditioner body is connected to the connecting pipe 18. Refer to Figure 1 . The connecting pipe 18 is connected to the output end of the HVAC system to realize the transportation of air flow, and the louver 17 is used to deflect the air flow and send it into the room.

[0058] The above is only the preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed as the preferred embodiment above, it is not intended to limit the form and style of the products of the present invention. Any person skilled in the art can make some modifications or decorations to equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as the content does not depart from the technical solution of the present invention, it still belongs to the patent scope of the technical solution of the present invention.

Claims

1. A device for adjusting the air volume of a HVAC air outlet, comprising an air outlet pipe (1). It is characterized in that: An air volume adjusting mechanism (2) is provided in the air outlet pipe (1), a dust-proof net (3) is provided at the rear end of the air outlet pipe (1), a cleaning device capable of cleaning the surface of the dust-proof net (3) is provided on the dust-proof net (3), a rotating ring (4) capable of rotating forward and backward is sleeved on the air outlet pipe (1), and the rotating ring (4) can cooperate with the cleaning device and the air volume adjusting mechanism (2) respectively when rotating forward and backward, and drive the cleaning device to clean the dust-proof net (3) and drive the air volume adjusting mechanism (2) to adjust the air volume of the air outlet. A rotating groove (1a) surrounding the outer wall of the air outlet pipe (1) for one week is provided, and an air volume adjusting groove (1b) is provided in front of the rotating groove (1a). The air volume adjusting groove (1b) includes a connecting section (1b1) inclined to the axis of the air outlet pipe (1) and connected to the rotating groove (1a) and a sliding section (1b2) parallel to the rotating groove (1a). A limiting slider (4a) is provided on the inner wall of the rotating ring (4), and the limiting slider (4a) can be slidably installed in the rotating groove (1a). The limiting slider (4a) can make a circular motion along the rotating groove (1a) when the rotating ring (4) rotates forward, and make the rotating ring (4) cooperate with the cleaning device to drive the cleaning device to clean the dust-proof net (3); when the rotating ring (4) rotates backward, the limiting slider (4a) can enter the sliding section (1b2) through the connecting section (1b1) of the air volume adjusting groove (1b), so that the rotating ring (4) moves forward relative to the air outlet pipe (1) by a certain distance to disengage from the cleaning device and cooperate with the air volume adjusting mechanism (2), so as to drive the air volume adjusting mechanism (2) to adjust the air volume of the air outlet when the limiting slider (4a) slides in the sliding section (1b2) of the air volume adjusting groove (1b).

2. The device for adjusting the air volume of a HVAC air outlet according to claim 1, It is characterized in that: A second rotating groove surrounding the inner wall of the rotating ring (4) for one week is provided, and a second air volume adjusting groove is provided at the rear side of the second rotating groove. The second air volume adjusting groove includes a second connecting section inclined to the axis of the rotating ring (4) and connected to the second rotating groove and a second sliding section parallel to the second rotating groove. A second limiting slider is provided on the outer wall of the air outlet pipe (1), and the second limiting slider can be slidably installed in the second rotating groove. The second limiting slider can make a circular motion along the second rotating groove when the rotating ring (4) rotates forward, and make the rotating ring (4) cooperate with the cleaning device to drive the cleaning device to clean the dust-proof net (3); when the rotating ring (4) rotates backward, the second limiting slider can enter the second sliding section through the second connecting section of the second air volume adjusting groove, so that the rotating ring (4) moves forward relative to the air outlet pipe (1) by a certain distance to disengage from the cleaning device and cooperate with the air volume adjusting mechanism (2), so as to drive the air volume adjusting mechanism (2) to adjust the air volume of the air outlet when the second limiting slider slides in the second sliding section of the second air volume adjusting groove.

3. The device for adjusting the air volume of a HVAC air outlet according to claim 1 or 2, It is characterized in that: The cleaning device includes a cleaning rod (5) horizontally arranged on the surface of the dust-proof net (3) and capable of rotating around the axis of the dust-proof net (3). The cleaning rod (5) is in contact with the surface of the dust-proof net (3). A limiting hanging plate (6) is provided at the rear side of the rotating ring (4). The limiting hanging plate (6) can resist the end of the cleaning rod (5) when the rotating ring (4) rotates forward to drive the cleaning rod (5) to rotate on the surface of the dust-proof net (3), thereby cleaning the dust-proof net (3).

4. The air volume adjustment device for the HVAC air outlet according to claim 1 or 2, characterized in that: The air volume adjustment mechanism (2) includes a connecting shaft (2a) radially arranged in the air outlet pipe (1) and capable of rotating around its own axis. The number of the connecting shafts (2a) is multiple and they are annularly and spacedly distributed in the air outlet pipe (1). An adjustment plate (2b) is provided on the connecting shaft (2a). The adjustment plate (2b) can rotate together with the connecting shaft (2a), and two adjacent adjustment plates (2b) can abut against or separate from each other under the rotation action of the connecting shaft (2a). One end of the connecting shaft (2a) extends out of the air outlet pipe (1) and is provided with an adjustment gear (2c). A first gear ring (7) is provided on the front side of the rotating ring (4). A limiting component (8) is provided on the air outlet pipe (1). The first gear ring (7) can be disengaged from and away from the adjustment gear (2c) or approach and engage with the adjustment gear (2c) under the action of the limiting component (8) when the rotating ring (4) rotates forward or backward.

5. The air volume adjustment device for the HVAC air outlet according to claim 4, characterized in that: The limiting component (8) includes a second gear ring (8a) sleeved on the air outlet pipe (1) and sliding rods (8b) annularly and spacedly distributed on the second gear ring (8a). A connecting ring (8c) is provided on the rotating ring (4). A fixing rod (8d) is provided on the air outlet pipe (1). The interior of the fixing rod (8d) is hollow and a spring (8e) is provided in its hollow part. The fixing rod (8d) is provided with a strip-shaped opening (8d1) on its side wall close to the second gear ring (8a). The second gear ring (8a) is connected to the sliding rod (8b) through a connecting rod (8f) passing through the strip-shaped opening (8d1). One end of the sliding rod (8b) extends into the hollow part of the fixing rod (8d) and is connected to the spring (8e), and the other end is connected to the connecting ring (8c) through two limiting members (8h). The connecting ring (8c) is located between the two limiting members (8h) and can slide therein. The adjustment gear (2c) is located between the first gear ring (7) and the second gear ring (8a) and can engage with the second gear ring (8a) when the rotating ring (4) rotates forward to limit the self-rotation of the adjustment gear (2c), and disengage from the second gear ring (8a) and engage with the first gear ring (7) when the rotating ring (4) rotates backward to rotate under the drive of the rotating ring (4).

6. The air volume adjustment device for the HVAC air outlet according to claim 4, characterized in that: The front end of the air outlet pipe (1) is provided with a wind guiding plate (9), and the wind guiding plate (9) includes a plurality of straight plates (9a) parallel to the axial direction of the air outlet pipe (1).

7. The air volume regulating device for the air outlet of a heating, ventilation and air conditioning system according to claim 3, characterized in that: A mounting seat (10) is rotatably connected to the middle of the dust-proof net (3). A first bevel gear (11) surrounding the mounting seat (10) is provided outside the mounting seat (10). The cleaning rod (5) is movably installed in the mounting seat (10), and the first bevel gear (11) meshes with a second bevel gear (12) provided on the cleaning rod (5), so that when the cleaning rod (5) rotates around the axis of the dust-proof net (3), the cleaning rod (5) can rotate around its own axis under the action of the first bevel gear (11) and the second bevel gear (12).

8. The air volume regulating device for the air outlet of a heating, ventilation and air conditioning system according to claim 1 or 2, characterized in that: An outer ring gear (13) is provided on the rotating ring (4). The outer ring gear (13) is meshed with a transmission gear (14), and the transmission gear (14) is connected to a motor (15) for driving its rotation.

9. A heating, ventilation and air conditioning system, comprising an air conditioner body and a terminal air box (16) connected thereto, characterized in that: The air volume regulating device for the air outlet of a heating, ventilation and air conditioning system according to any one of claims 1-8 is provided in the terminal air box (16).

Images