Fresh air distribution device and its method

Abstract

The present invention relates to the technical field of fresh air devices, and specifically discloses a fresh air air distribution device, which includes an air distribution box. A plurality of air distribution openings are provided on the air distribution box. A docking device for sealing connection between the pipeline and the air distribution opening is installed between the pipeline and the air distribution opening. The docking device includes: a flange coaxially and sealingly installed outside the air distribution opening, and a connection ring is arranged in the inner wall of the flange; a docking head coaxially and sealingly installed at one end of the pipeline. The docking head is in clearance fit with the flange, and the inner diameter of the inner ring of the docking head is larger than the inner diameter of the inner ring of the connection ring. A limiting ring is arranged on the inner wall of the docking head; a sealing sleeve. 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 fixedly and sealingly connected to the outer side surface of the flange. Through the cooperation of the sealing sleeve and the pulling assembly, a reliable sealing connection between the docking head and the flange is realized, solving the problem of stress relaxation caused by long-term extrusion of the sealing ring in the prior art and improving the sealing reliability.

Description

Technical Field

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

[0002] As people's requirements for the living environment are getting 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, which can avoid the problem of uneven air volume in a single pipeline and ensure that each area receives an appropriate air volume.

[0003] The Chinese patent document with the authorization announcement number CN213778118U discloses an air distribution box, which includes a box body and a plurality of ventilation bellows. A plurality of ventilation openings are provided on both sides of the box body. A connecting pipe is provided between the ventilation bellows and the ventilation opening. The connecting pipe includes a pipe body and end heads located at both ends of the pipe body. The outer walls of both end heads are slidably connected with clamping blocks, and elastic members are provided between the clamping blocks and the end heads. Clamping holes for the clamping blocks to be inserted are penetrated through the ventilation opening and the ventilation bellows.

[0004] When connecting the pipeline of the existing air distribution box, first put the sealing ring on the pipeline, then insert the pipeline into the connecting flange, and then fix the pipeline in the flange through the pin. The sealing ring (such as rubber, silica gel, etc.) relies on elastic deformation for sealing. Long-term extrusion will cause stress relaxation of the material, gradually lose the resilience ability, 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 air distribution device, aiming to solve the problem that the sealing ring will undergo stress relaxation after long-term extrusion in the related technology, resulting in a decline in the sealing effect.

[0006] The fresh air air distribution device includes an air distribution box. A plurality of air distribution openings are provided on the air distribution box. A docking device for making a sealed connection between the pipeline and the air distribution opening is installed between the pipeline and the air distribution opening. The docking device includes:

[0007] A flange, coaxially and hermetically installed outside the air distribution opening. A connecting ring is provided on the inner wall of the flange. The side of the connecting ring close to the air distribution opening is hermetically connected to the inner wall of the flange;

[0008] A docking head, coaxially and hermetically installed at one end of the pipeline. The docking head is in clearance fit with the flange, and the inner diameter of the inner ring of the docking head is larger than the outer diameter of the outer ring of the connecting ring. A limiting ring is provided on the inner wall of the docking head;

[0009] The sealing sleeve is in a conical ring shape and is elastic. The outer ring of the sealing sleeve is sleeved on the flange and is fixedly connected to the outer side surface of the flange in a sealed manner. An inner retaining ring is fixedly connected to the inner ring of the sealing sleeve, and the diameter of the inner retaining ring is smaller than the inner diameter of the connecting ring.

[0010] At least two pulling assemblies, including a triggering mechanism, a guiding 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 guiding mechanism, and a deflection area for controlling the top of the hook rod to deflect towards the axis of the flange is provided at the top of the guiding mechanism. The triggering mechanism is used to limit the hook rod in the deflection area. When the docking head moves towards the inside of the flange, the triggering mechanism releases the hook rod, and the elastic member releases elastic potential energy to make the top of the hook rod hook onto the top of the limiting ring, thereby applying a pulling force towards the air distribution port direction to the limiting ring.

[0011] The effect is that the sealed connection between the air distribution box and the pipeline is achieved through the docking device. The outer end of the sealing sleeve is sealed with the flange, and is sealed with the docking head by abutting against the docking head through the inner retaining ring. When the docking head moves towards the inside of the flange, the triggering mechanism releases the hook rod, and the elastic member releases elastic potential energy to make the top of the hook rod hook onto the top of the limiting ring, thereby applying a pulling force to ensure sealing. Through the cooperation of the flange, the docking head, the sealing sleeve, and the pulling assembly, the problem of sealed connection between the air distribution box and the pipeline is solved. And the pulling assembly can continuously apply a pulling force to the sealing sleeve to prevent the sealing sleeve from becoming loose and resulting in a deteriorated sealing effect.

[0012] Furthermore, an outer retaining ring is fixedly connected to the outer ring of the sealing sleeve, and a limiting assembly for restricting the outer retaining ring from detaching from the flange is installed on the outer side surface of the flange.

[0013] Furthermore, the limiting assembly includes two semi-circular rings that can be combined into a circular ring. The two semi-circular rings are detachably connected to the outer circumferential surface of the flange. A receiving groove adapted to the outer retaining ring is provided at the top of the inner wall of the semi-circular ring, and a gap for the sealing sleeve to pass through is provided at the top of the receiving groove.

[0014] Furthermore, rounded corners are provided at the edges where the flange, the docking head, and the connecting ring contact the sealing sleeve.

[0015] Furthermore, the guiding mechanism includes a sliding groove fixedly installed in the flange. The sliding groove is composed of a vertical sliding groove and an inclined sliding groove. The inclined sliding groove is located at the top of the vertical sliding groove, and the side wall of the inclined sliding groove away from the axis of the flange gradually approaches the axis of the flange from bottom to top. Two sliders adapted to the sliding groove are installed on the side surface of the hook rod, and the width of the top of the inclined sliding groove is greater than the diameter of the slider.

[0016] Further, the triggering mechanism includes a sliding rod horizontally installed in the flange. A limit pin is fixedly arranged on the upper part of the side of the hook rod. A protruding part capable of abutting against the limit pin is arranged on the side of the sliding rod close to the hook rod. The top surface of the protruding part is a plane, and the bottom surface is provided with an inclined surface. A spring piece is installed at one end of the sliding rod close to the axis of the flange to enable the protruding part to contact the limit pin. The triggering device further includes a pushing structure for controlling the sliding rod to approach the axis of the flange.

[0017] Further, the pushing structure includes a wedge-shaped part arranged at one end of the sliding rod away from the axis of the flange. Both the upper and lower surfaces of the wedge-shaped part are inclined surfaces. When the limit ring descends or ascends, the limit ring can abut against the wedge-shaped part.

[0018] Further, the gap width between the docking head and the flange is greater than the thickness of the sealing sleeve. When the docking head is about to enter the connecting ring, at this time, 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 docking head and the inner ring of the connecting ring.

[0019] Further, the present application also proposes a usage method of the above fresh air distribution device, including the following steps:

[0020] Step 1: Plan the pipeline route according to the position of the air distribution openings on the air distribution box to ensure that the pipeline is aligned with the air distribution openings;

[0021] Step 2: Install the docking head on the pipeline;

[0022] Step 3: Insert the docking head into the flange. At the same time, the inner retaining ring is located inside the docking head, and the sealing sleeve is stretched into the flange;

[0023] Step 4: The triggering mechanism is triggered, and the top of the hook rod is hooked to the top of the limit ring, thereby applying a pulling force to the limit ring in the direction of the air distribution opening.

[0024] Further, in Step 4, a sealing cavity is formed between the sealing sleeve, the flange and the connecting ring. When the docking head enters the connecting ring, the volume of the sealing cavity decreases, so that the sealing sleeve expands and tightly adheres to the outer circular surface of the docking head.

[0025] The beneficial effects of the present invention are as follows: Through the cooperation of the sealing sleeve and the pulling component, a reliable sealed connection between the docking head and the flange is achieved, solving the problem of stress relaxation caused by long-term extrusion of the sealing ring in the prior art, improving the sealing reliability, extending the service life. At the same time, this design is convenient for installation and maintenance, and improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present invention.

[0027] Figure 2 is a cross-sectional view of the present invention when the sealing sleeve is not stretched.

[0028] Figure 3 This is a schematic structural view of the pulling component in the present invention.

[0029] Figure 4 This is a schematic structural view of the sliding rod in the present invention.

[0030] Figure 5 This is a cross-sectional view of the pulling component in the present invention when it is not triggered.

[0031] Figure 6 This is a cross-sectional view of the pulling component in the present invention when it is triggered.

[0032] Reference numerals:

[0033] 1. Flange; 11. Connecting ring; 2. Docking head; 3. Sealing sleeve; 31. Limiting component; 311. Accommodating groove; 4. Pulling component; 41. Sliding rod; 411. Protruding part; 412. Wedge part; 42. Chute; 421. Vertical chute; 422. Inclined chute; 43. Hook rod; 44. Elastic member. Detailed description of the specific implementation

[0034] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0035] As Figure 1 shown, the fresh air distribution device includes a distribution box. A plurality of air distribution openings are provided on the distribution box. A docking device for sealing connection between the pipeline and the air distribution opening is installed therebetween.

[0036] As Figure 1 and Figure 2 shown, the docking device includes a flange 1, a docking head 2, a sealing sleeve 3 and at least two pulling components 4. The flange 1 is coaxially and fixedly installed on the outer side of the air distribution opening, and the two are hermetically connected therebetween. The docking head 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 head 2, so as to seal between the flange 1 and the docking head 2. The pulling component 4 applies a pulling force to the docking head 2 in the direction towards the air distribution opening, so that the sealing sleeve 3 is always kept in a taut state and avoids loosening, so as to ensure the sealing effect.

[0037] The sealing sleeve 3 is made of an elastic material, preferably rubber. The sealing sleeve 3 is conical, and the top and bottom of the cone are open to form an inner ring and an outer ring. Inner retaining rings and outer retaining rings are coaxially and fixedly arranged at the inner ring and the outer ring respectively. The inner baffle and the outer retaining ring are both made of hard materials, such as steel rings, and the steel rings are completely wrapped by the rubber at the inner ring and the outer ring of the sealing sleeve 3.

[0038] The diameter of flange 1 is smaller than that of the outer retaining ring. In the middle of the inner wall of flange 1, there is a connecting ring 11. At the edges where flange 1 and connecting ring 11 contact the sealing sleeve 3, there are rounded corners. On the side of connecting ring 11 close to the air distribution opening, it is hermetically connected to the inner wall of flange 1. The diameter of connecting ring 11 is greater than or equal to that of the inner baffle. An annular space with an opening facing away from the air distribution opening is formed between connecting ring 11 and the inner wall of flange 1. Two semi-circular rings are detachably connected (preferably by screws) to the outside of flange 1. The two semi-circular rings can be assembled into a complete ring. At the top of the inner wall of the semi-circular ring, there is a receiving groove 311 adapted to the outer retaining ring, and a gap for the sealing sleeve 3 to pass through is provided at the top of the receiving groove 311.

[0039] At the edge where the docking head 2 contacts the sealing sleeve 3, there is a rounded corner. The diameter of the inner circumferential surface of the docking head 2 is greater than the outer diameter of the connecting ring 11, and the diameter of the outer circumferential surface of the docking head 2 is smaller than the inner diameter of flange 1. Therefore, there is a clearance fit between the docking head 2 and both the connecting ring 11 and flange 1, thus forming a gap for the sealing sleeve 3 to pass through. A limiting ring is fixedly arranged on the inner wall of the docking head 2. The pulling component 4 is hooked to the limiting ring, thereby applying a pulling force towards the air distribution opening direction to the docking head 2.

[0040] As Figure 3 shown, the pulling component 4 includes a sliding rod 41, a sliding groove 42, a hook rod 43, and an elastic member 44. The sliding groove 42 is fixedly installed on the inner wall of flange 1 and is used to control the up-and-down sliding and deflection of the hook rod 43. The sliding rod 41 is horizontally slidably installed in flange 1 and is used to hold the hook rod 43 so that the hook rod 43 is located at the top of the sliding 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 flange 1, thereby applying a pulling force towards the air distribution opening direction to the hook rod 43;

[0041] The hook rod 43 is composed of a bent section and a connecting section. The bent section is located at the top of the connecting section. Limiting pins are arranged on both sides of the connecting section near the bent section. On both sides of the bottom of the connecting section, there are two sliding blocks, and the shape of the sliding blocks is cylindrical;

[0042] The sliding groove 42 is composed of a vertical sliding groove 421 and an inclined sliding groove 422. The inclined sliding groove 422 is located at the top of the vertical sliding groove 421. The inclined sliding groove 422 gradually approaches the axis of flange 1 from the end far from the air distribution opening to the end close to the air distribution opening, and an extension groove facing the axis direction of flange 1 is provided at the top of the inclined sliding groove 422. When both sliding blocks are located in the vertical sliding groove 421, the hook rod 43 is in a vertical state. When the two sliding blocks are respectively located in the vertical sliding groove 421 and the inclined sliding groove 422, the hook rod 43 is in an inclined state.

[0043] As Figure 3 and Figure 4As shown, a spring plate is installed on the sliding rod 41 to apply an elastic force to the sliding rod 41 in the direction close to the inner wall of the docking head 2. A protruding portion 411 is provided on one side of the sliding rod 41 close to the hook rod 43. The top surface of the protruding portion 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 sliding rod 41 moves towards the axis of the flange 1, and then the limit pin crosses over the protruding portion 411. When the sliding rod 41 moves with the hook rod 43, the limit pin abuts against the top of the protruding portion 411, thus restricting the hook rod 43 from moving downward. A wedge portion 412 is provided at one end of the sliding rod 41 away from the axis of the flange 1. Both the upper and lower surfaces of the wedge portion 412 are inclined surfaces. When the limit ring descends or ascends and abuts against the wedge portion 412, the limit ring can make the sliding rod 41 move towards the axis of the flange 1, so that the limit pin no longer abuts against the top of the protruding portion 411.

[0044] The using method of the fresh air air distribution device includes the following steps:

[0045] S1. Plan the pipeline routing according to the position of the air distribution openings on the air distribution box to ensure that the pipeline is aligned with the air distribution openings;

[0046] S2. Install the docking head 2 on the pipeline;

[0047] S3. Press the docking head 2 against the sealing sleeve 3. At the same time, the inner retaining ring is located inside the docking head 2, and then insert it into the flange 1, so that the sealing sleeve 3 is stretched into the flange 1 (refer to Figure 5 )

[0048] S4.1. The limit ring abuts against the top of the hook rod 43, causing the hook rod 43 to deflect towards the axis of the flange 1, so as to make way for the limit ring;

[0049] S4.2. The docking head 2 enters the annular space against the sealing sleeve 3. The docking head 2 and the connecting ring 11 are tightly fitted through the sealing sleeve 3, so that a sealed cavity is formed between the sealing sleeve 3, the flange 1 and the connecting ring 11. And the continuous movement of the docking head 2 reduces the volume of the sealed cavity, so that the sealing sleeve 3 expands and tightly adheres to the outer circular surface of the docking head 2;

[0050] S4.3. When the limit ring abuts against the wedge portion 412, the sliding rod 41 moves towards the axis of the flange 1, and the limit pin no longer abuts against the top of the protruding portion 411. While the hook rod 43 descends, it deflects towards the limit ring, so that the hook rod 43 is hooked to the top of the limit ring. The top of the hook rod 43 is hooked to the top of the limit ring, thus applying a pulling force towards the air distribution opening direction to the limit ring. Then release the pipeline and no longer apply a pushing force. The docking head 2 and the flange 1 are connected by the pulling force of the tension spring (refer to Figure 6 )

[0051] S5. During use, due to the weakened stress elasticity of the sealing sleeve 3, the spring pulls the docking head 2 further into the annular space, so that the sealing sleeve 3 is always in close contact with the flange 1 port, the docking head 2 buckle and the connecting head, thus avoiding air leakage;

[0052] S6. When the sealing sleeve 3 is stretched to the limit and needs to be replaced, pull the pipeline outwards, so that the docking head 2 is pulled outwards. During the pulling out process, the limiting ring first abuts against the wedge-shaped part 412, so that the limiting ring crosses the wedge-shaped part 412. Then, the hook rod 43 slides in the inclined chute 422 and gradually disengages from the limiting ring. Before disengaging, the limiting pin abuts against the bottom inclined surface of the protruding part 411, and the limiting pin crosses the protruding part 411. Then, the hook rod 43 disengages from the limiting ring, and the limiting pin abuts against the top of the protruding part 411.

[0053] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. Fresh air distribution device, including a distribution box, on which a plurality of air distribution openings are provided, and a docking device for sealing connection between the pipeline and the air distribution opening is installed between the pipeline and the air distribution opening, characterized in that, The docking device includes: A flange (1), coaxially and sealingly installed outside the air distribution opening. A connecting ring (11) is provided on the inner wall of the flange (1), and the side of the connecting ring (11) close to the air distribution opening is sealingly connected to the inner wall of the flange (1); A docking head (2), coaxially and sealingly installed at one end of the pipeline. There is a clearance fit between the docking head (2) and the flange (1), and the inner diameter of the docking head (2) is larger than the outer diameter of the connecting ring (11). A limiting ring is provided on the inner wall of the docking head (2); A sealing sleeve (3), the sealing sleeve (3) is in a conical ring shape and has elasticity. The outer ring of the sealing sleeve (3) is sleeved on the flange (1) and is fixedly and sealingly connected to the outer side surface of the flange (1). An inner retaining ring is fixedly connected at the inner ring of the sealing sleeve (3), and the diameter of the inner retaining ring is smaller than the inner diameter of the connecting ring (11); At least two pulling assemblies (4), including a triggering mechanism, a guiding mechanism, a hook rod (43) and an elastic member (44). The 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 installed in the flange (1) through the guiding mechanism, and a deflection area for controlling the top of the hook rod (43) to deflect towards the axis of the flange (1) is provided at the top of the guiding mechanism. The deflection area includes a chute (42) fixedly installed in the flange (1). The chute (42) is composed of a vertical chute (421) and an inclined chute (422). The inclined chute (422) is located at the top of the vertical chute (421), and the side wall of the inclined chute (422) far from the axis of the flange (1) gradually approaches the axis of the flange (1) from bottom to top. Two sliders adapted to the chute (42) are installed on the side surface of the hook rod (43). The width of the top of the inclined chute (422) is larger than the diameter of the slider. When both sliders are located in the vertical chute (421), the hook rod (43) is in a vertical state. When the two sliders are respectively located in the vertical chute (421) and the inclined chute (422), the hook rod (43) is in an inclined state. The triggering mechanism is used to limit the hook rod (43) in the deflection area. When the docking head (2) moves into the flange (1), the triggering mechanism releases the hook rod (43), and the elastic member (44) releases elastic potential energy to make the top of the hook rod (43) hook the top of the limiting ring, so as to apply a pulling force towards the air distribution opening direction to the limiting ring.

2. The fresh air distribution device according to claim 1, wherein An outer retaining ring is fixedly connected to the outer ring of the sealing sleeve (3), and a limiting component for restricting the outer retaining ring from detaching 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 component (31) includes two semi-circular rings that can be combined into a circular ring. The two semi-circular rings are detachably connected to the outer circumferential surface of the flange (1). A receiving groove (311) adapted to the outer retaining ring is provided at the top of the inner wall of the semi-circular ring, and a gap for the sealing sleeve (3) to pass through is provided at the top of the receiving groove (311).

4. The fresh air distribution device according to claim 1, wherein, Round corners are provided at the edges of the flange (1), the docking head (2) and the connecting ring (11) in contact with the sealing sleeve (3).

5. The fresh air distribution device according to claim 1, characterized in that, The triggering mechanism includes a sliding rod (41) horizontally and slidably installed in the flange (1). A limit pin is fixedly arranged on the upper part of the side surface of the hook rod (43). A protruding part (411) capable of abutting against the limit pin is arranged on the side of the sliding rod (41) close to the hook rod (43). The top surface of the protruding part (411) is a plane, and the bottom surface is provided with an inclined surface. A spring piece is installed at one end of the sliding rod (41) close to the axis of the flange (1) to enable the protruding part (411) to contact the limit pin. The triggering mechanism further includes a pushing structure for controlling the sliding rod (41) to approach the axis of the flange (1).

6. The fresh air distribution device according to claim 5, characterized in that, The pushing structure includes a wedge-shaped part (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 part (412) are both inclined surfaces. When the limit ring descends or ascends, the limit ring can abut against the wedge-shaped part (412).

7. The fresh air distribution device according to claim 1, characterized in that, The gap width between the docking head (2) and the flange (1) is greater than the thickness of the sealing sleeve (3). When the docking head (2) is about to enter the connecting ring (11), at this time, 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 docking head (2) and the outer ring of the connecting ring (11).

8. A method for using the fresh air distribution device according to any one of claims 1-7, characterized in that, It includes the following steps: Step 1: Plan the pipeline routing according to the position of the air distribution openings on the air distribution box to ensure that the pipeline is aligned with the air distribution openings. Step 2: Install the docking head (2) on the pipeline. Step 3: Insert the docking head (2) into the flange (1). At the same time, the inner retaining ring is located inside the docking head (2) to stretch the sealing sleeve (3) into the flange (1). Step 4: The triggering mechanism is triggered, and the top of the hook rod (43) is hooked to the top of the limit ring, thereby applying a pulling force to the limit ring in the direction of the air distribution opening.

9. The method for using the fresh air distribution device according to claim 8, characterized in that, In Step 4, a sealing cavity is formed among the sealing sleeve (3), the flange (1) and the connecting ring (11). When the docking head (2) enters the connecting ring (11), the volume of the sealing cavity decreases, so that the sealing sleeve (3) expands and tightly adheres to the outer cylindrical surface of the docking head (2).

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