Fresh air distribution device and method

Abstract

The invention relates to the technical field of fresh air devices, and particularly discloses a fresh air distribution device which comprises an air distribution box, a plurality of air distribution openings are formed in the air distribution box, a butt joint device used for enabling a pipeline and the air distribution openings to be connected in a sealed mode is installed between the pipeline and the air distribution openings, and the butt joint device comprises flanges coaxially installed on the outer sides of the air distribution openings in a sealed mode, and connecting rings are arranged in the inner walls of the flanges; the butt joint is coaxially installed at one end of the pipeline in a sealed mode, the butt joint is in clearance fit with the flange, the inner ring diameter of the butt joint is larger than that of the connecting ring, and a limiting ring is arranged on the inner wall of the butt joint; the sealing sleeve is in a conical ring shape and has elasticity, the flange is sleeved with an outer ring of the sealing sleeve, the outer ring of the sealing sleeve is fixedly connected with the outer side face of the flange in a sealed mode, through cooperation of the sealing sleeve and the traction assembly, reliable sealing connection between the butt joint and the flange is achieved, and the problem of stress relaxation caused by long-term extrusion of a sealing ring in the prior art is solved; and the sealing reliability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air devices, and in particular to a fresh air distribution device and a method thereof. Background Art

[0002] As people's requirements for living environment become higher and higher, more and more people begin to choose central air conditioning systems. An efficient ventilation system directly determines whether the air volume generated by the central fan can be evenly distributed to each area. The air distribution box is an important part of the ventilation system. It can avoid the problem of uneven air volume in a single pipeline and ensure that each area gets the appropriate air volume.

[0003] A Chinese patent document with authorization announcement number CN213778118U discloses an air distribution box, which includes a box body and a plurality of ventilation bellows, wherein a plurality of vents are provided on both sides of the box body, a connecting pipe is provided between the ventilation bellows and the vents, the connecting pipe includes a tube body and end heads located at both ends of the tube body, the outer walls of the two end heads are slidably connected with a clamping block, an elastic member is provided between the clamping block and the end heads, and the vents and the ventilation bellows are penetrated with clamping holes for the clamping blocks to be embedded.

[0004] When the existing air distribution box is connected to the pipeline, the sealing ring is first put on the pipeline, and then the pipeline is inserted into the connecting flange. The pipeline is then fixed in the flange by a bayonet. The sealing ring (such as rubber, silicone, etc.) relies on elastic deformation to seal. Long-term extrusion will cause stress relaxation of the material, gradually lose its resilience, and cannot return to its original state. Therefore, the pressure of the flange and the pipeline on the sealing ring becomes smaller, resulting in a poor sealing effect and air leakage. Summary of the invention

[0005] The present invention provides a fresh air distribution device, aiming to solve the problem in the related art that a sealing ring may be subjected to stress relaxation due to long-term extrusion, resulting in reduced sealing effect.

[0006] The fresh air distribution device comprises an air distribution box, a plurality of air distribution ports are provided on the air distribution box, a butt joint for sealingly connecting the pipe and the air distribution ports is installed between the pipe and the air distribution ports, and the butt joint comprises: The flange and the coaxial seal are installed on the outer side of the air distribution port, and a connecting ring is arranged on the inner wall of the flange, and the side of the connecting ring close to the air distribution port is sealed and connected with the inner wall of the flange; The butt joint, the coaxial seal is installed at one end of the pipeline, the butt joint and the flange are clearance-matched, and the inner ring diameter of the butt joint is larger than the outer ring diameter of the connecting ring, and a limit ring is provided on the inner wall of the butt joint; The sealing sleeve is in a conical ring shape and has elasticity. The outer ring of the sealing sleeve is sleeved on the flange and is sealed and fixedly connected to the outer side surface of the flange. The inner ring of the sealing sleeve is fixedly connected to an inner retaining ring, and the diameter of the inner retaining ring is smaller than the inner diameter of the connecting ring. At least two pulling components include a trigger mechanism, a guide mechanism, a hook rod and an elastic member, the two ends of the elastic member are respectively connected to the hook rod and the inner wall of the flange, the hook rod is slidably installed in the flange through the guide mechanism, and a deflection zone is provided on the top of the guide mechanism for controlling the deflection of the top of the hook rod toward the flange axis. The trigger mechanism is used to limit the hook rod in the deflection zone. When the docking head moves into the flange, the trigger mechanism releases the hook rod, and the elastic member releases the elastic potential energy to make the top of the hook rod hook with the top of the limit ring, thereby applying a pulling force to the limit ring in the direction of the air outlet.

[0007] The effect is that the sealed connection between the air box and the pipeline is achieved through the docking device, the outer end of the sealing sleeve is sealed with the flange, and the inner retaining ring is pressed against the docking head to seal with the docking head. When the docking head moves into the flange, the trigger mechanism releases the hook rod, and the elastic member releases the elastic potential energy to make the top of the hook rod hook with the top of the limit ring, thereby applying tension to ensure sealing. The problem of sealed connection between the air box and the pipeline is solved through the cooperation of the flange, the docking head, the sealing sleeve and the pulling assembly. And the pulling assembly can continuously apply tension to the sealing sleeve to prevent the sealing sleeve from loosening and causing the sealing effect to deteriorate.

[0008] Furthermore, an outer retaining ring is fixedly connected to the outer ring of the sealing sleeve, and a limiting component for limiting the outer retaining ring from separating from the flange is installed on the outer side surface of the flange.

[0009] Furthermore, the limiting assembly includes two semicircular rings that can be combined into a circular shape, the two semicircular rings are detachably connected to the outer circumferential surface of the flange, the top of the inner wall of the semicircular ring is provided with a receiving groove that is compatible with the outer retaining ring, and the top of the receiving groove is provided with a gap for the sealing sleeve to pass through.

[0010] Furthermore, the edges of the flange, the butt joint and the connecting ring contacting the sealing sleeve are all provided with rounded corners.

[0011] Furthermore, the guide mechanism includes a slide groove fixedly installed in the flange, the slide groove consists of a vertical slide groove and an inclined slide groove, the inclined slide groove is located at the top of the vertical slide groove, and a side wall of the inclined slide groove away from the flange axis gradually approaches the flange axis from bottom to top, and two sliding blocks adapted to the slide groove are installed on the side of the hook rod, and the width of the top of the inclined slide groove is greater than the diameter of the sliding block.

[0012] Furthermore, the trigger mechanism includes a sliding rod horizontally slidably installed in the flange, a limit pin is fixedly provided on the upper part of the side of the hook rod, a protrusion that can resist the limit pin is provided on the side of the sliding rod close to the hook rod, and the top surface of the protrusion is a plane, and the bottom surface is provided with an inclined surface. A spring sheet is installed at one end of the sliding rod close to the flange axis, which is used to enable the protrusion to contact the limit pin. The trigger device also includes a pushing structure for controlling the sliding rod to approach the flange axis.

[0013] Furthermore, the pushing structure includes a wedge-shaped portion arranged at one end of the sliding rod away from the flange axis, and the upper and lower surfaces of the wedge-shaped portion are both inclined surfaces. When the limiting ring descends or ascends, the limiting ring can abut against the wedge-shaped portion.

[0014] Furthermore, the width of the gap between the butt joint and the flange is greater than the thickness of the sealing sleeve. When the butt joint is about to enter the connecting ring, the sealing sleeve is in a stretched state, and the thickness of the sealing sleeve is not less than the width of the gap between the inner ring of the butt joint and the inner ring of the connecting ring.

[0015] Furthermore, the present application also proposes a method for using the above-mentioned fresh air distribution device, comprising the following steps: Step 1: Plan the direction of the pipeline according to the position of the air outlet on the air distribution box, and ensure that the pipeline is aligned with the air outlet; Step 2: Install the butt joint on the pipe; Step 3: Insert the butt joint into the flange, with the inner retaining ring located inside the butt joint, so that the sealing sleeve is stretched into the flange; Step 4: The trigger mechanism is triggered, and the top of the hook rod is hooked with the top of the limit ring, thereby applying a pulling force to the limit ring in the direction of the air outlet.

[0016] Furthermore, in step four, a sealing cavity is formed between the sealing sleeve, the flange and the connecting ring, and the butt joint enters into the connecting ring to reduce the volume of the sealing cavity, thereby causing the sealing sleeve to expand toward the butt joint and fit closely to the outer circumferential surface of the butt joint.

[0017] The beneficial effects of the present invention are as follows: through the cooperation of the sealing sleeve and the pulling assembly, a reliable sealing connection between the joint and the flange is achieved, the stress relaxation problem caused by long-term extrusion of the sealing ring in the prior art is solved, the sealing reliability is improved, and the service life is extended. At the same time, the design is easy to install and maintain, and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a cross-sectional view of the sealing sleeve of the present invention when it is not stretched.

[0020] Figure 3 It is a schematic diagram of the structure of the pulling assembly in the present invention.

[0021] Figure 4 It is a structural schematic diagram of the sliding rod in the present invention.

[0022] Figure 5 It is a cross-sectional view of the pulling assembly of the present invention when it is not triggered.

[0023] Figure 6 It is a cross-sectional view of the pulling assembly of the present invention when it is triggered.

[0024] Reference numerals: 1. Flange; 11. Connecting ring; 2. Butt joint; 3. Sealing sleeve; 31. Limiting assembly; 311. Accommodating groove; 4. Pulling assembly; 41. Sliding rod; 411. Protruding portion; 412. Wedge-shaped portion; 42. Sliding groove; 421. Vertical sliding groove; 422. Oblique sliding groove; 43. Hook rod; 44. Elastic member. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] like Figure 1 As shown, the fresh air distribution device includes an air distribution box, on which a plurality of air distribution ports are provided, and a docking device is installed between the pipeline and the air distribution ports for sealingly connecting the two.

[0027] like Figure 1 and Figure 2 As shown, the docking device includes a flange 1, a docking joint 2, a sealing sleeve 3 and at least two pulling components 4. The flange 1 is coaxially fixedly installed on the outer side of the air distribution port, and the two are sealed. The docking joint 2 is installed on the pipeline. The outer edge of the sealing sleeve 3 is connected to the outer circumferential surface of the flange 1, and the inner edge is connected to the docking joint 2, and the flange 1 and the docking joint 2 are sealed at the same time. The pulling component 4 applies a pulling force to the docking joint 2 toward the air distribution port, so that the sealing sleeve 3 is always kept in a taut state to avoid loosening, so as to ensure the sealing effect.

[0028] The sealing sleeve 3 is made of an elastic material, preferably rubber. The sealing sleeve 3 is conical, and the top and bottom ends of the cone are open to form an inner ring and an outer ring. The inner ring and the outer ring are coaxially fixed with an inner baffle ring and an outer baffle ring. The inner baffle plate and the outer baffle ring are both made of hard materials, such as steel rings, and the steel rings are completely wrapped with rubber at the inner ring and the outer ring of the sealing sleeve 3.

[0029] The diameter of the flange 1 is smaller than the diameter of the outer retaining ring. A connecting ring 11 is provided in the middle of the inner wall of the flange 1. The edges of the flange 1 and the connecting ring 11 contacting the sealing sleeve 3 are both provided with rounded corners. The connecting ring 11 is sealed with the inner wall of the flange 1 on the side close to the air outlet. The diameter of the connecting ring 11 is greater than or equal to the diameter of the inner baffle. An annular space with an opening facing away from the air outlet is formed between the connecting ring 11 and the inner wall of the flange 1. The external detachable connection of the flange 1 (preferably a screw connection) has two semicircular rings, which can be assembled into a complete ring. A receiving groove 311 adapted to the outer retaining ring is provided at the top of the inner wall of the semicircular ring, and a gap for the sealing sleeve 3 to pass through is provided at the top of the receiving groove 311.

[0030] The edges where the butt joint 2 contacts the sealing sleeve 3 are provided with rounded corners. The diameter of the inner circumference of the butt joint 2 is larger than the diameter of the outer ring of the connecting ring 11, and the diameter of the outer circumference of the butt joint 2 is smaller than the diameter of the inner circumference of the flange 1. Therefore, the butt joint 2, the connecting ring 11 and the flange 1 are all clearance-fitted, thereby forming a gap for the sealing sleeve 3 to pass through. A limiting ring is fixedly provided on the inner wall of the butt joint 2, and the pulling assembly 4 is hooked with the limiting ring, thereby applying a pulling force to the butt joint 2 toward the air outlet direction.

[0031] like Figure 3 As shown, the pulling assembly 4 includes a slide rod 41, a slide groove 42, a hook rod 43, and an elastic member 44. The slide groove 42 is fixedly installed on the inner wall of the flange 1, and is used to control the hook rod 43 to slide up and down and deflect. The slide rod 41 is horizontally slidably installed in the flange 1, and is used to clamp the hook rod 43 so that the hook rod 43 is located at the top of the slide groove 42. The elastic member 44 is preferably a tension spring, and the two ends of the tension spring are respectively connected to the hook rod 43 and the flange 1, so as to apply a pulling force toward the air outlet direction to the hook rod 43; The hook rod 43 is composed of a bending section and a connecting section. The bending section is located at the top of the connecting section. Limit pins are provided on both sides of the connecting section near the bending section. Two sliders are provided on both sides of the bottom of the connecting section. The shape of the sliders is cylindrical. The slide groove 42 consists of a vertical slide groove 421 and an inclined slide groove 422. The inclined slide groove 422 is located at the top of the vertical slide groove 421. The inclined slide groove 422 gradually approaches the axis of the flange 1 from the end away from the air outlet to the end close to the air outlet, and the top of the inclined slide groove 422 is provided with an extension groove toward the axis of the flange 1. When the two sliders are both located in the vertical slide groove 421, the hook rod 43 is in a vertical state. When the two sliders are respectively located in the vertical slide groove 421 and the inclined slide groove 422, the hook rod 43 is in an inclined state.

[0032] like Figure 3 and Figure 4 As shown, a spring sheet is installed on the slide bar 41 for applying an elastic force to the slide bar 41 in the direction close to the inner wall of the docking head 2. A protrusion 411 is provided on the side of the slide bar 41 close to the hook rod 43. The top surface of the protrusion 411 is a plane and the bottom surface is provided with an inclined surface. When the hook rod 43 rises, the limit pin abuts against the inclined surface, so that the slide bar 41 moves toward the axis of the flange 1, and then the limit pin passes over the protrusion 411. When the slide bar 41 and the hook rod 43 move, the limit pin abuts against the top of the protrusion 411, thereby limiting the downward movement of the hook rod 43. A wedge-shaped portion 412 is provided at one end of the slide bar 41 away from the axis of the flange 1. The upper and lower surfaces of the wedge-shaped portion 412 are both inclined surfaces. When the limit ring descends or rises and abuts against the wedge-shaped portion 412, the limit ring can make the slide bar 41 move toward the axis of the flange 1, so that the limit pin no longer abuts against the top of the protrusion 411.

[0033] The method for using the fresh air distribution device comprises the following steps: S1. Plan the direction of the pipeline according to the position of the air outlet on the air distribution box to ensure that the pipeline is aligned with the air outlet; S2, install the butt joint 2 on the pipeline; S3. Place the butt joint 2 against the sealing sleeve 3, with the inner retaining ring located inside the butt joint 2, and then insert it into the flange 1 to stretch the sealing sleeve 3 into the flange 1 (refer to Figure 5 ); S4.1. The limiting ring abuts against the top of the hook rod 43, so that the hook rod 43 deflects toward the axis of the flange 1, thereby giving way to the limiting ring; S4.2, the butt joint 2 presses against the sealing sleeve 3 and enters the annular space, and the butt joint 2 and the connecting ring 11 are tightly matched through the sealing sleeve 3, so that a sealing cavity is formed between the sealing sleeve 3, the flange 1 and the connecting ring 11, and the butt joint 2 continues to move to reduce the volume of the sealing cavity, so that the sealing sleeve 3 expands toward the butt joint 2 and is close to the outer circumferential surface of the butt joint 2; S4.3, when the limiting ring and the wedge-shaped portion 412 are against each other, the slide rod 41 moves toward the axis of the flange 1, the limiting pin no longer against the top of the protruding portion 411, and the hook rod 43 deflects toward the limiting ring while descending, so that the hook rod 43 is hooked with the top of the limiting ring, and the top of the hook rod 43 is hooked with the top of the limiting ring, so that the limiting ring is subjected to a pulling force in the direction of the air outlet, and then the pipeline is released and no thrust is applied, and the butt joint 2 is connected to the flange 1 by the pulling force of the tension spring (refer to Figure 6 ); S5. During use, the sealing sleeve 3 weakens due to stress elasticity, and the spring pulls the butt joint 2 to continue to move into the annular space, so that the sealing sleeve 3 is always in close contact with the flange 1, the butt joint 2 buckle and the connector, thereby avoiding air leakage; S6. When the sealing sleeve 3 is stretched to the limit and needs to be replaced, the pipe is pulled outward to pull the joint 2 outward. During the pulling-out process, the limit ring first abuts against the wedge-shaped portion 412, so that the limit ring passes over the wedge-shaped portion 412. Then the hook rod 43 slides in the inclined groove 422 and gradually disengages from the limit ring. When it is not disengaged, the limit pin abuts against the bottom inclined surface of the protrusion 411, and the limit pin passes over the protrusion 411. Then, the hook rod 43 is separated from the limit ring, and the limit pin abuts against the top of the protrusion 411.

[0034] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fresh air distribution device, comprising an air distribution box, a plurality of air distribution ports are provided on the air distribution box, a butt joint for sealingly connecting the pipe and the air distribution ports is installed between the pipe and the air distribution ports, and the characteristics are as follows: The docking device comprises: A flange (1) is coaxially sealed and mounted on the outer side of the air distribution port; a connecting ring (11) is provided on the inner wall of the flange (1); a side of the connecting ring (11) close to the air distribution port is sealingly connected to the inner wall of the flange (1); A butt joint (2) is coaxially sealed and installed at one end of the pipeline, the butt joint (2) and the flange (1) are clearance-matched, the inner ring diameter of the butt joint (2) is larger than the outer ring diameter of the connecting ring (11), and a limit ring is provided on the inner wall of the butt joint (2); The sealing sleeve (3) is in the shape of a cone ring and has elasticity. The outer ring of the sealing sleeve (3) is sleeved on the flange (1) and is sealed and fixedly connected to the outer side surface of the flange (1). The inner ring of the sealing sleeve (3) is fixedly connected to an inner retaining ring, and the diameter of the inner retaining ring is smaller than the inner diameter of the connecting ring (11); At least two pulling components (4) include a trigger mechanism, a guide mechanism, a hook rod (43) and an elastic member (44), wherein two ends of the elastic member (44) are respectively connected to the hook rod (43) and the inner wall of the flange (1), the hook rod (43) is slidably mounted in the flange (1) via the guide mechanism, and a deflection zone for controlling the top of the hook rod (43) to deflect toward the axis of the flange (1) is provided at the top of the guide mechanism, and the trigger mechanism is used to limit the hook rod (43) in the deflection zone, and when the docking head (2) moves into the flange (1), the trigger mechanism releases the hook rod (43), and the elastic member (44) releases elastic potential energy to cause the top of the hook rod (43) to be hooked with the top of the limiting ring, thereby applying a pulling force to the limiting ring in the direction of the air outlet.

2. The fresh air distribution device according to claim 1, characterized in that: An outer retaining ring is fixedly connected to the outer ring of the sealing sleeve (3), and a limiting component for limiting the outer retaining ring from separating from the flange (1) is installed on the outer side surface of the flange (1).

3. The fresh air distribution device according to claim 2, characterized in that: The limiting assembly (31) comprises two semicircular rings that can be combined into a circular ring shape, the two semicircular rings being detachably connected to the outer circumferential surface of the flange (1), a receiving groove (311) adapted to the outer retaining ring being provided at the top of the inner wall of the semicircular ring, and a gap for allowing the sealing sleeve (3) to pass through being provided at the top of the receiving groove (311).

4. The fresh air distribution device according to claim 1, characterized in that: The edges of the flange (1), the butt joint (2) and the connecting ring (11) contacting the sealing sleeve (3) are all provided with rounded corners.

5. The fresh air distribution device according to claim 1, characterized in that: The guide mechanism comprises a slide groove (42) fixedly mounted in the flange (1), the slide groove (42) comprising a vertical slide groove (421) and an inclined slide groove (422), the inclined slide groove (422) being located at the top of the vertical slide groove (421), and a side wall of the inclined slide groove (422) away from the axis of the flange (1) gradually approaches the axis of the flange (1) from bottom to top, and two sliding blocks adapted to the slide groove (42) are mounted on the side of the hook rod (43), and the width of the top of the inclined slide groove (422) (42) is greater than the diameter of the sliding block.

6. The fresh air distribution device according to claim 5, characterized in that: The trigger mechanism comprises a slide bar (41) horizontally slidably mounted in the flange (1); a limit pin is fixedly arranged on the upper part of the side of the hook bar (43); a protrusion (411) capable of abutting against the limit pin is arranged on the side of the slide bar (41) close to the hook bar (43); the top surface of the protrusion (411) is a plane, and the bottom surface is provided with an inclined surface; a spring is installed at one end of the slide bar (41) close to the axis of the flange (1) for enabling the protrusion (411) to contact the limit pin; and the trigger device further comprises a pushing structure for controlling the slide bar (41) to approach the axis of the flange (1).

7. The fresh air distribution device according to claim 6, characterized in that: The pushing structure comprises a wedge-shaped portion (412) arranged at one end of the sliding rod (41) away from the axis of the flange (1); the upper and lower surfaces of the wedge-shaped portion (412) are both inclined surfaces; when the limiting ring descends or ascends, the limiting ring can abut against the wedge-shaped portion (412).

8. The fresh air distribution device according to claim 1, characterized in that: The width of the gap between the butt joint (2) and the flange (1) is greater than the thickness of the sealing sleeve (3); when the butt joint (2) is about to enter the connecting ring (11), the sealing sleeve (3) is in a stretched state, and the thickness of the sealing sleeve (3) is not less than the width of the gap between the inner ring of the butt joint (2) and the outer ring of the connecting ring (11).

9. A method for using the fresh air distribution device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Plan the direction of the pipeline according to the position of the air outlet on the air distribution box, and ensure that the pipeline is aligned with the air outlet; Step 2: Install the butt joint (2) on the pipeline; Step 3: insert the butt joint (2) into the flange (1), with the inner retaining ring located inside the butt joint (2) so that the sealing sleeve (3) is stretched into the flange (1); Step 4: The trigger mechanism is triggered, and the top of the hook rod (43) is hooked with the top of the limit ring, thereby applying a pulling force in the direction of the air outlet to the limit ring.

10. The method for using the fresh air distribution device according to claim 9, characterized in that: In step 4, a sealing cavity is formed between the sealing sleeve (3), the flange (1) and the connecting ring (11), and the butt joint (2) enters the connecting ring (11) to reduce the volume of the sealing cavity, thereby causing the sealing sleeve (3) to expand toward the butt joint (2) and to fit closely to the outer circumferential surface of the butt joint (2).

Images