Knob assembly, air filter device and wall-mounted boiler

Abstract

The present invention discloses a knob assembly, an air filter device and a wall-mounted boiler. When the filter in the first filter assembly needs to be replaced, the power member is rotated along the first direction so that the power member can selectively drive the first input member to rotate, and the second input member does not move. At this time, the first rotating shaft drives the first filter assembly to rotate under the action of the first input member to unfold the filter in the first filter assembly. When the filter in the second filter assembly needs to be replaced, the power member is rotated along the second direction so that the power member can selectively drive the second input member to rotate, and the first input member does not move. At this time, the second rotating shaft drives the second filter assembly to rotate under the action of the second input member to unfold the filter in the second filter assembly. In this way, the rotating assembly rotates in different directions to individually control the replacement of the filters in the first filter assembly and the second filter assembly, so that the filter replacement operation is more targeted and flexible.

Description

Technical Field

[0001] The invention relates to the technical field, and in particular to a knob assembly, an air filter device and a wall-mounted boiler. Background Art

[0002] At present, the filter structure of the gas wall-mounted boiler is installed at the air inlet connected to the combustion chamber. The outside air enters from the air inlet and is purified by the filter; then, the purified air is mixed with the gas and enters the combustion chamber for combustion. When the filter needs to be cleaned, the entire box needs to be disassembled, which makes cleaning and maintenance troublesome. Especially for the wall-mounted boiler with double-sided filter, the replacement cost is high. At the same time, the replacement operation is relatively complicated, time-consuming and labor-intensive, resulting in reduced replacement efficiency. Summary of the invention

[0003] Based on this, the first technical problem solved by the present invention is to provide a knob assembly that can effectively and quickly replace the left and right filters, thereby improving the replacement efficiency; at the same time, it is also beneficial to save the filter maintenance cost.

[0004] The second technical problem solved by the present invention is to provide an air filtering device that can effectively and quickly replace the left and right filters, thereby improving the replacement efficiency; at the same time, it can also effectively save the filter maintenance cost.

[0005] The third technical problem solved by the present invention is to provide a wall-mounted boiler that can effectively and quickly replace the left and right filters to improve the replacement efficiency; at the same time, it also effectively saves the filter maintenance cost.

[0006] The technical solution is as follows:

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A knob assembly, the knob assembly comprising: a power member; a first input member and a second input member, the first input member and the second input member are spaced apart and sleeved on the power member, when the power member rotates along a first direction, the first input member can be driven to rotate, and when the power member rotates along a second direction, the second input member can be driven to rotate, the first direction is opposite to the second direction; a first rotating shaft and a second rotating shaft, the first input member and the second input member respectively correspond to the first rotating shaft and the second rotating shaft for transmission cooperation, the first rotating shaft is used to drive the first filter assembly to rotate to unfold the filter in the first filter assembly, and the second rotating shaft is used to drive the second filter assembly to rotate to unfold the filter in the second filter assembly.

[0009] The knob assembly of the present invention has the following beneficial effects compared with the background technology: when the filter in the first filter assembly needs to be replaced, the power member is rotated along the first direction so that the power member drives the first input member to rotate, and the second input member does not move. At this time, the first rotating shaft drives the first filter assembly to rotate under the action of the first input member to unfold the filter in the first filter assembly (i.e., unfold the filter in the reeled state) to achieve the replacement of the filter in the first filter assembly. When the filter in the second filter assembly needs to be replaced, the power member is rotated along the second direction so that the power member drives the second input member to rotate, and the first input member does not move. At this time, the second rotating shaft drives the second filter assembly to rotate under the action of the second input member to unfold the filter in the second filter assembly (i.e., unfold the filter in the reeled state) to achieve the replacement of the filter in the second filter assembly. In this way, the rotating assembly rotates in different directions to separately control the replacement of the filters in the first filter assembly and the second filter assembly, making the replacement operation of the filter more targeted and flexible. At the same time, during the replacement process, the filter can be replaced by rotating the power part in the first direction or the second direction, and the left and right filters can be replaced effectively and quickly, thereby improving the replacement efficiency. In addition, during the replacement process, the first rotating shaft drives the first filter assembly to rotate, and the second rotating shaft drives the second filter assembly to rotate, so as to expand the filters in the first filter assembly and the second filter assembly to achieve replacement, so as to quickly complete the replacement of the new filter without disassembling the filter structure, which is conducive to saving the cost of filter replacement.

[0010] The principle and effect of the present invention are further described below in combination with the above scheme:

[0011] In one embodiment, the knob assembly further includes a first one-way structure, which is disposed between the first input member and the power member. When the power member rotates along the first direction, the power member interferes with the first input member through the first one-way structure. When the power member rotates along the second direction, the power member is disconnected from the first input member through the first one-way structure.

[0012] In one embodiment, the first one-way structure includes a first pawl, a first locking portion and a first elastic member. The first pawl is arranged on one of the power member and the first input member through the first elastic member, and the first locking portion is arranged on the other. When the power member rotates along the first direction, the first pawl abuts against the first locking portion. When the power member rotates along the second direction, the first locking portion pushes the first pawl and slides with the first pawl.

[0013] In one embodiment, a first contact surface and a first guide sliding surface are provided on the first locking portion, and the first guide sliding surface and the first contact surface are sequentially distributed along the first direction on the first locking portion. When the power member rotates along the first direction, the first pawl contacts the first contact surface. When the power member rotates along the second direction, the first guide sliding surface pushes the first pawl and slides with the first pawl.

[0014] In one embodiment, a first receiving hole is provided on the power member or the first input member, and the first elastic member is located in the first receiving hole.

[0015] In one embodiment, the knob assembly further includes a second one-way structure, which is disposed between the second input member and the power member. When the power member rotates along the second direction, the power member interferes with the second input member through the second one-way structure. When the power member rotates along the first direction, the power member is disconnected from the interference with the second input member through the second one-way structure.

[0016] In one embodiment, the second one-way structure includes a second pawl, a second locking portion and a second elastic member. The second pawl is arranged on one of the power member and the second input member through the second elastic member, and the second locking portion is arranged on the other. When the power member rotates along the second direction, the second pawl abuts against the second locking portion. When the power member rotates along the first direction, the second locking portion pushes the second pawl and slides with the second pawl.

[0017] In one embodiment, the knob assembly further includes a third rotating shaft and a transmission member, the transmission member is wound around the second rotating shaft and the third rotating shaft, and the third rotating shaft is used for transmission cooperation with the second filter assembly.

[0018] In one of the embodiments, a knob is provided on the power member.

[0019] In one embodiment, a first transmission tooth is disposed on the first input member, and a first thread meshing with the first transmission tooth is disposed on the first rotating shaft.

[0020] In one embodiment, the second input member is provided with a second transmission tooth, and the second rotating shaft is provided with a second thread meshing with the second transmission tooth.

[0021] The above second technical problem is solved by the following technical solution:

[0022] An air filter device comprises a box body assembly, a first filter assembly, a second filter assembly and a knob assembly as described in any one of the above items, the first filter assembly, the second filter assembly and the knob assembly are all installed on the box body assembly, and the knob assembly is located between the first filter assembly and the second filter assembly, the first rotating shaft is in transmission cooperation with the first filter assembly, and the second rotating shaft is in transmission cooperation with the second filter assembly.

[0023] The air filter device described in the present invention has the following beneficial effects compared with the background technology: when the filter in the first filter assembly needs to be replaced, the power member is rotated along the first direction so that the power member can drive the first input member to rotate, and the second input member does not move. At this time, the first rotating shaft drives the first filter assembly to rotate under the action of the first input member to unfold the filter in the first filter assembly (i.e., unfold the filter in the reeled state) to achieve the replacement of the filter in the first filter assembly. When the filter in the second filter assembly needs to be replaced, the power member is rotated along the second direction so that the power member can drive the second input member to rotate, and the first input member does not move. At this time, the second rotating shaft drives the second filter assembly to rotate under the action of the second input member to unfold the filter in the second filter assembly (i.e., unfold the filter in the reeled state) to achieve the replacement of the filter in the second filter assembly. In this way, the rotating assembly rotates in different directions to individually control the replacement of the filters in the first filter assembly and the second filter assembly, making the filter replacement operation more targeted and flexible. At the same time, during the replacement process, the filter replacement can be completed by rotating the power part in the first direction or the second direction, and the left and right filters can be replaced effectively and quickly, thereby improving the replacement efficiency. In addition, during the replacement process, the first rotating shaft drives the first filter assembly to rotate, and the second rotating shaft drives the second filter assembly to rotate, so as to expand the filters in the first filter assembly and the second filter assembly to achieve replacement, so as to quickly complete the replacement of the new filter without disassembling the filter structure, thereby saving the cost of filter replacement.

[0024] The principle and effect of the present invention are further described below in combination with the above scheme:

[0025] In one embodiment, the box body assembly includes a first box body and a second box body that are compatible with each other, the first filter assembly, the second filter assembly and the knob assembly are all installed between the first box body and the second box body, two air outlet holes are spaced apart on the first box body, and air inlet holes opposite to the air outlet holes are spaced apart on the second box body.

[0026] In one of the embodiments, a retaining frame is provided on the first box body, and the retaining frame is used to support the filters in the first filter assembly and the second filter assembly.

[0027] In one embodiment, the air inlet hole is cut by a plane perpendicular to the center of the air inlet hole, and the cross-sectional area S obtained increases from an end of the air inlet hole close to the first box body to an end of the air inlet hole away from the first box body.

[0028] The third technical problem mentioned above is solved by the following technical solution:

[0029] A wall-mounted boiler, characterized in that it comprises the air filtering device described in any one of the above.

[0030] The wall-mounted boiler described in the present invention has the following beneficial effects compared with the background technology: when the filter in the first filter assembly needs to be replaced, the power member is rotated along the first direction so that the power member can drive the first input member to rotate, and the second input member does not move. At this time, the first rotating shaft drives the first filter assembly to rotate under the action of the first input member to unfold the filter in the first filter assembly (i.e., unfold the filter in the reeled state) to achieve the replacement of the filter in the first filter assembly. When the filter in the second filter assembly needs to be replaced, the power member is rotated along the second direction so that the power member can drive the second input member to rotate, and the first input member does not move. At this time, the second rotating shaft drives the second filter assembly to rotate under the action of the second input member to unfold the filter in the second filter assembly (i.e., unfold the filter in the reeled state) to achieve the replacement of the filter in the second filter assembly. In this way, the rotating assembly rotates in different directions to individually control the replacement of the filters in the first filter assembly and the second filter assembly, making the filter replacement operation more targeted and flexible. At the same time, during the replacement process, the filter replacement can be completed by rotating the power part in the first direction or the second direction, and the left and right filters can be replaced effectively and quickly, thereby improving the replacement efficiency. In addition, during the replacement process, the first rotating shaft drives the first filter assembly to rotate, and the second rotating shaft drives the second filter assembly to rotate, so as to expand the filters in the first filter assembly and the second filter assembly to achieve replacement, so as to quickly complete the replacement of the new filter without disassembling the filter structure, thereby saving the cost of filter replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 This is a schematic diagram of the structure of a knob assembly according to an embodiment of the present invention;

[0034] Figure 2 A partial cross-sectional view of a knob assembly structure according to an embodiment of the present invention;

[0035] Figure 3 A cross-sectional view of the structure between the power member and the first input member according to an embodiment of the present invention;

[0036] Figure 4 A cross-sectional view of the structure between the power member and the second input member according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the structure of a power component according to an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the structure of a box assembly according to an embodiment of the present invention;

[0039] Figure 7 A cross-sectional view of a box assembly structure according to an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of the structure of the box body assembly after the second box body is hidden according to an embodiment of the present invention;

[0041] Fig. 9 This is a schematic diagram of the first box structure according to an embodiment of the present invention;

[0042] Fig.10 This is a schematic diagram of the structure of a filter assembly according to an embodiment of the present invention;

[0043] Fig.11 A partial cross-sectional view of the filter assembly structure according to an embodiment of the present invention;

[0044] Fig.12 for Fig.11 A magnified schematic diagram of the structure at the center circle A;

[0045] Fig.13 for Fig.11 A magnified schematic diagram of the structure at the middle circle B;

[0046] Fig.14 The figure is a schematic diagram of the structure of a wall-mounted boiler according to an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 100, knob assembly; 110, power member; 111, first limiting portion; 1111, first mounting hole; 112, second limiting portion; 1121, third mounting hole; 113, knob; 114, first receiving hole; 115, second receiving hole; 120, first input member; 121, first transmission tooth; 130, second input member; 131, second transmission tooth; 140, first rotating shaft; 141, first thread; 150, second rotating shaft; 151, second thread; 160, first one-way structure; 161, first pawl; 1611, second mounting hole; 1612, first positioning block; 162, first locking portion; 1621, first contact surface; 1622, first guide surface; 163, first elastic member; 170, second one-way structure; 171, second pawl; 1711 , fourth mounting hole; 1712, second positioning block; 172, second locking portion; 1721, second contact surface; 1722, second guide sliding surface; 173, second elastic member; 180, third rotating shaft; 181, transmission member; 200, box body assembly; 210, first box body; 211, air outlet; 212, retaining frame; 220, second box body; 221, air inlet; 230, sealing member; 300, first filter assembly; 310, filter; 320, first roller; 321, first accommodating groove; 322, first supporting portion; 323, second supporting portion; 324, transmission portion; 330, second roller; 331, second accommodating groove; 332, third supporting portion; 333, fourth supporting portion; 340, first pressing member; 350, second pressing member; 400, second filter assembly. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0050] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 6A knob assembly 100, the knob assembly 100 includes: a power member 110; a first input member 120 and a second input member 130, the first input member 120 and the second input member 130 are spaced apart and sleeved on the power member 110, when the power member 110 rotates along a first direction, one of the first input member 120 can be driven to rotate, when the power member 110 rotates along a second direction, one of the second input member 130 can be driven to rotate, the first direction is opposite to the second direction; a first rotating shaft 140 and a second rotating shaft 150, the first input member 120 and the second input member 130 are respectively corresponding to the first rotating shaft 140 and the second rotating shaft 150 for transmission cooperation, the first rotating shaft 140 is used to drive the first filter screen 310 assembly to rotate to unfold the filter screen 310 in the first filter screen 310 assembly, and the second rotating shaft 150 is used to drive the second filter screen 310 assembly to rotate to unfold the filter screen 310 in the second filter screen 310 assembly.

[0051] When the above-mentioned knob assembly 100 needs to replace the filter 310 in the first filter 310 assembly, the power member 110 is rotated along the first direction, so that the power member 110 selectively drives the first input member 120 to rotate, and the second input member 130 does not move. At this time, the first rotating shaft 140 drives the first filter 310 assembly to rotate under the action of the first input member 120 to unfold the filter 310 in the first filter 310 assembly (i.e., unfold the filter 310 in the rolled-up state) to achieve the replacement of the filter 310 in the first filter 310 assembly. When the filter 310 in the second filter 310 assembly needs to be replaced, the power member 110 is rotated along the second direction, so that the power member 110 selectively drives the second input member 130 to rotate, and the first input member 120 does not move. At this time, the second rotating shaft 150, under the action of the second input member 130, drives the second filter 310 assembly to rotate, so as to unfold the filter 310 in the second filter 310 assembly (i.e., unfold the filter 310 in the rolled-up state), and realize the replacement of the filter 310 in the second filter 310 assembly. In this way, the rotating assembly rotates in different directions to individually control the replacement of the filter 310 in the first filter 310 assembly and the second filter 310 assembly, making the replacement operation of the filter 310 more targeted and flexible. At the same time, during the replacement process, the filter 310 can be replaced by rotating the power member 110 in the first direction or the second direction, and the left and right filters 310 can be replaced effectively and quickly, thereby improving its replacement efficiency. In addition, during the replacement process, the first rotating shaft drives the first filter 310 assembly to rotate, and the second rotating shaft drives the second filter 310 assembly to rotate, so as to unfold the filters 310 in the first filter 310 assembly and the second filter 310 assembly to achieve replacement, thereby achieving rapid replacement of the new filter 310 without disassembling the filter 310 structure, which is beneficial to saving the cost of replacing the filter 310.

[0052] It should be noted that the fact that the power member 110 can selectively drive the first input member 120 or the second input member 130 to rotate should be understood as follows: when the power member 110 rotates along the first direction, it can drive the first input member 120 to rotate, but does not drive the second input member 130 to rotate; when the power member 110 rotates along the second direction, it can drive the second input member 130 to rotate, but does not drive the first input member 120 to rotate. The first direction may be a clockwise direction, and the second direction may be a counterclockwise direction; the first direction may also be a counterclockwise direction, and the second direction may be a clockwise direction.

[0053] It should also be noted that the transmission method between the first input member 120 and the first rotating shaft 140 can be gear transmission, belt transmission, chain transmission, etc. At the same time, the transmission method between the second input member 130 and the second rotating shaft 150 can also be gear transmission, belt transmission, chain transmission, etc.

[0054] For further information, please refer to Figure 2 and Figure 3 The knob assembly 100 further includes a first one-way structure 160. The first one-way structure 160 is disposed between the first input member 120 and the power member 110. When the power member 110 rotates along a first direction, the power member 110 contacts and cooperates with the first input member 120 through the first one-way structure 160. When the power member 110 rotates along a second direction, the power member 110 is disconnected from contact with the first input member 120 through the first one-way structure 160. In this way, through the first one-way structure 160, the power member 110 drives the first input member 120 to rotate in one direction.

[0055] It should be noted that, in order to realize the one-way drive between the power member 110 and the first input member 120, at least the first one-way structure 160 can be designed as a ball and spring combination structure or other structures. For example: a groove structure with a certain slope is provided on the power member 110, and the ball is connected to the groove structure through a spring. When the power member 110 rotates along the first direction, the ball moves to the end with a higher slope in the groove driven by the spring to be clamped on the first input member 120; when the power member 110 rotates along the second direction, the ball is pushed to the end with a lower slope in the groove under the action of the inclined surface of the first input member 120 to realize the one-way drive, etc.

[0056] For further information, please refer to Figure 3The first one-way structure 160 includes a first pawl 161, a first locking portion 162 and a first elastic member 163. Between the power member 110 and the first input member 120, the first elastic member 163 is arranged on one of them, and the first locking portion 162 is arranged on the other. That is, the distribution of the first pawl 161 and the first locking portion 162 has two states: one, the first pawl 161 is arranged on the power member 110, and the first locking portion 162 is arranged on the first input member 120; two, the first pawl 161 is arranged on the first input member 120, and the first locking portion 162 is arranged on the power member 110. When the power member 110 rotates along the first direction, the first pawl 161 abuts against the first locking portion 162. When the power member 110 rotates along the second direction, the first locking portion 162 pushes the first pawl 161 and slides with the first pawl 161. It can be seen that during the replacement of the first filter 310 assembly, the power member 110 is rotated along the first direction so that the first pawl 161 contacts the first locking portion 162, ensuring stable transmission between the power member 110 and the first input member 120, driving the first input member 120 to rotate, so that the first rotating shaft 140 can drive the first filter 310 assembly to rotate. If the power member 110 rotates along the second direction, the first pawl 161 is disconnected from the first locking portion 162. At this time, there is no transmission relationship between the power member 110 and the first input member 120, that is, the first input member 120 does not work, and the first filter 310 assembly cannot be replaced.

[0057] Optionally, the first elastic member 163 may be a spring, elastic rubber, elastic metal sheet, etc.

[0058] It should be noted that the first pawl 161 is arranged on the power member 110 or the first input member 120 through the first elastic member 163, so that the first pawl 161 is in an elastically retractable state on the power member 110 or the first input member 120, that is, the first pawl 161 is kept in close contact with the first locking portion 162 under the action of the first elastic member 163; at the same time, the first pawl 161 has an elastic retraction function under the action of the first elastic member 163, so that the first locking portion 162 can push the first pawl 161 and disengage from the first pawl 161, so that the first input member 120 is in an inactive state.

[0059] In addition, the sliding cooperation between the first locking portion 162 and the first pawl 161 should be understood as: the first locking portion 162 and the first pawl 161 can slide relatively with each other, and no large driving force is generated therebetween, so that the power member 110 drives the first input member 120 to rotate together.

[0060] Specifically, please refer to Figure 3The first pawl 161 is disposed on the power member 110 through the first elastic member 163 , and the first locking portion 162 is disposed on the first input member 120 .

[0061] In one embodiment, please refer to Figure 3 , a first contact surface 1621 and a first guide sliding surface 1622 are provided on the first locking portion 162. The first guide sliding surface 1622 and the first contact surface 1621 are sequentially distributed along the first direction on the first locking portion 162. That is, when the power member 110 rotates along the first direction, the first contact surface 1621 will contact the first pawl 161 (achieve contact) before the first guide sliding surface 1622. When the power member 110 rotates along the second direction, the first guide sliding surface 1622 will contact the first pawl 161 (achieve guide sliding) before the first contact surface 1621. In this way, when the power member 110 rotates along the first direction, the first pawl 161 contacts the first contact surface 1621, and when the power member 110 rotates along the second direction, the first guide sliding surface 1622 pushes the first pawl 161 and slides with the first pawl 161, so that the power member 110 can achieve a single-direction drive to rotate the first input member 120.

[0062] It should be noted that the first contact surface 1621 can be designed as a plane or a curved surface. When the first contact surface 1621 is designed as a plane, the first contact surface 1621 can be tilted, and one end of the first contact surface 1621 is deflected along the first direction; when the first contact surface 1621 is designed as a curved surface, the first contact surface 1621 can be a concave curved surface. Similarly, the first guide sliding surface 1622 can be designed as a plane or a curved surface. When the first guide sliding surface 1622 is designed as a plane, the first guide sliding surface 1622 can be tilted, and one end of the first guide sliding surface 1622 is deflected along the first direction; when the first guide sliding surface 1622 is designed as a curved surface, the first guide sliding surface 1622 can be a convex curved surface.

[0063] Specifically, please refer to Figure 3 The first locking portion 162 is a first conical tooth, and the first contact surface 1621 and the first guide surface 1622 are respectively located on opposite sides of the first conical tooth. In addition, there are multiple first locking portions 162, and the multiple first locking portions 162 are arranged at intervals along the circumference of the first input member 120. At this time, the first pawl 161 is arranged on the power member 110.

[0064] In one embodiment, please refer to Figure 5 Two first limiting portions 111 are provided on the power member 110. The two first limiting portions 111 are spaced apart in the axial direction of the power member 110 and are respectively located on opposite sides of the first pawl 161 to prevent the first pawl 161 from moving along the axial direction of the power member 110 when working.

[0065] For further information, please refer to Figure 2 and Figure 5 The first limiting portion 111 is provided with a first mounting hole 1111, and the first pawl 161 is provided with a second mounting hole 1611 opposite to the first mounting hole 1111. During the assembly process, the latch is inserted into the first mounting hole 1111 and the second mounting hole 1611 respectively, so that the first pawl 161 can be rotatably connected to the first limiting portion 111.

[0066] Specifically, please refer to Figure 5 The first limiting portion 111 is extended along the circumference of the power member 110 to form a mounting side wall. Figure 3 The first mounting hole 1111 on the first pawl 161 is arranged to be away from the abutting end of the first pawl 161. At the same time, one end of the first pawl 161 away from the abutting end of the first pawl 161 is an arc surface.

[0067] In one embodiment, please refer to Figure 3 The power member 110 or the first input member 120 is provided with a first receiving hole 114. The first elastic member 163 is located in the first receiving hole 114, so that the first pawl 161 is pushed by the first locking portion 162 and stably contracts, so that there is no conflict between the first pawl 161 and the first locking portion 162.

[0068] For further information, please refer to Figure 3 The first receiving hole 114 is disposed on the power member 110 , and an extending direction of the first receiving hole 114 on the power member 110 is inclined along the second direction.

[0069] In one embodiment, please refer to Figure 3 A first positioning block 1612 is provided on the first pawl 161 , and the first elastic member 163 is sleeved on the first positioning block 1612 , so that the first elastic member 163 is stably connected to the first pawl 161 .

[0070] In one embodiment, please refer to Figure 4 The knob assembly 100 further includes a second one-way structure 170. The second one-way structure 170 is disposed between the second input member 130 and the power member 110. When the power member 110 rotates along the second direction, the power member 110 contacts and cooperates with the second input member 130 through the second one-way structure 170. When the power member 110 rotates along the first direction, the power member 110 is disconnected from contacting with the second input member 130 through the second one-way structure 170. In this way, the power member 110 drives the second input member 130 to rotate in one direction through the second one-way structure 170.

[0071] It should be noted that, in order to realize the one-way drive between the power member 110 and the second input member 130, at least the second one-way structure 170 can be designed as a ball and spring combination structure or other structures. For example: a groove structure with a certain slope is provided on the power member 110, and the ball is connected to the groove structure through a spring. When the power member 110 rotates along the second direction, the ball moves to the end with a higher slope in the groove driven by the spring to be clamped on the second input member 130; when the power member 110 rotates along the first direction, the ball is pushed to the end with a lower slope in the groove under the action of the inclined surface of the second input member 130 to realize the one-way drive, etc.

[0072] For further information, please refer to Figure 4 The second one-way structure 170 includes a second pawl 171, a second locking portion 172 and a second elastic member 173. Between the power member 110 and the second input member 130, the second pawl 171 is disposed on one of them through the second elastic member 173, and the second locking portion 172 is disposed on the other. That is, the distribution of the second pawl 171 and the second locking portion 172 has two states: one, the second pawl 171 is disposed on the power member 110, and the second locking portion 172 is disposed on the second input member 130; two, the second pawl 171 is disposed on the second input member 130, and the second locking portion 172 is disposed on the power member 110. When the power member 110 rotates along the second direction, the second pawl 171 abuts against the second locking portion 172. When the power member 110 rotates along the first direction, the second locking portion 172 pushes the second pawl 171 and slides with the second pawl 171. It can be seen that during the replacement of the second filter screen 310 assembly, the power member 110 is rotated along the second direction so that the second pawl 171 contacts the second locking portion 172, ensuring stable transmission between the power member 110 and the second input member 130, driving the second input member 130 to rotate, so that the second rotating shaft 150 can drive the second filter screen 310 assembly to rotate. If the power member 110 rotates along the first direction, the second pawl 171 is disconnected and contacts the second locking portion 172. At this time, there is no transmission relationship between the power member 110 and the second input member 130, that is, the second input member 130 does not work, and the second filter screen 310 assembly cannot be replaced.

[0073] Specifically, please refer to Figure 3 and Figure 4 When the power piece 110 rotates along the first direction, the first pawl 161 contacts the first locking portion 162, and the second locking portion 172 pushes the second pawl 171 and slides with the second pawl 171 (i.e., the contact is broken); when the power piece 110 rotates along the second direction, the first locking portion 162 pushes the first pawl 161 and slides with the first pawl 161 (i.e., the contact is broken), and the second pawl 171 contacts the second locking portion 172.

[0074] Optionally, the second elastic member 173 may be a spring, elastic rubber, elastic metal sheet, etc.

[0075] It should be noted that the second pawl 171 is arranged on the power member 110 or the second input member 130 through the second elastic member 173, so that the second pawl 171 is in an elastic telescopic state on the power member 110 or the second input member 130, that is, the second pawl 171 is maintained in close contact with the second locking portion 172 under the action of the second elastic member 173; at the same time, the second pawl 171 has an elastic retraction function under the action of the second elastic member 173, so that the second locking portion 172 can push the second pawl 171 and disengage from the second pawl 171, so that the second input member 130 is in an inactive state.

[0076] In addition, the sliding cooperation between the second locking portion 172 and the second pawl 171 should be understood as: the second locking portion 172 and the second pawl 171 can slide relative to each other, and no large driving force is generated therebetween, so that the power member 110 drives the second input member 130 to rotate together.

[0077] Specifically, please refer to Figure 4 The second pawl 171 is disposed on the power member 110 through the second elastic member 173 , and the second locking portion 172 is disposed on the second input member 130 .

[0078] In one embodiment, please refer to Figure 4 , a second contact surface 1721 and a second guide sliding surface 1722 are provided on the second locking portion 172. The second guide sliding surface 1722 and the second contact surface 1721 are sequentially distributed along the second direction on the second locking portion 172. That is, when the power member 110 rotates along the second direction, the second contact surface 1721 will contact the second pawl 171 (achieve contact) before the second guide sliding surface 1722. When the power member 110 rotates along the first direction, the second guide sliding surface 1722 will contact the second pawl 171 (achieve guide sliding) before the second contact surface 1721. In this way, when the power member 110 rotates along the second direction, the second pawl 171 contacts the second contact surface 1721, and when the power member 110 rotates along the first direction, the second guide sliding surface 1722 pushes the second pawl 171 and slides with the second pawl 171, so that the power member 110 can achieve a single-direction drive to rotate the second input member 130.

[0079] It should be noted that the second contact surface 1721 can be designed as a plane or a curved surface. When the second contact surface 1721 is designed as a plane, the second contact surface 1721 can be tilted, and one end of the second contact surface 1721 is deflected along the second direction; when the second contact surface 1721 is designed as a curved surface, the second contact surface 1721 can be a concave curved surface. Similarly, the second guide sliding surface 1722 can be designed as a plane or a curved surface. When the second guide sliding surface 1722 is designed as a plane, the second guide sliding surface 1722 can be tilted, and one end of the second guide sliding surface 1722 is deflected along the second direction; when the second guide sliding surface 1722 is designed as a curved surface, the second guide sliding surface 1722 can be a convex curved surface.

[0080] Specifically, please refer to Figure 4 The second locking portion 172 is a second conical tooth, and the second contact surface 1721 and the second guide surface 1722 are respectively located on opposite sides of the second conical tooth. In addition, there are multiple second locking portions 172, and the multiple second locking portions 172 are arranged at intervals along the circumference of the second input member 130. At this time, the second pawl 171 is arranged on the power member 110.

[0081] In one embodiment, please refer to Figure 5 Two second limiting portions 112 are provided on the power member 110. The two second limiting portions 112 are spaced apart in the axial direction of the power member 110 and are respectively located on opposite sides of the second pawl 171 to prevent the second pawl 171 from moving along the axial direction of the power member 110 when working.

[0082] For further information, please refer to Figure 4 and Figure 5 The second limiting portion 112 is provided with a third mounting hole 1121, and the second pawl 171 is provided with a fourth mounting hole 1711 opposite to the third mounting hole 1121. During the assembly process, the latch is inserted into the third mounting hole 1121 and the fourth mounting hole 1711 respectively, so that the second pawl 171 can be rotatably connected to the second limiting portion 112.

[0083] Specifically, please refer to Figure 4 The second limiting portion 112 is extended along the circumference of the power member 110 to form a mounting side wall. In addition, the third mounting hole 1121 is arranged on the second pawl 171 to be away from the contact end of the second pawl 171. At the same time, one end of the second pawl 171 away from the contact end of the second pawl 171 is an arc surface.

[0084] In one embodiment, please refer to Figure 4The power member 110 or the second input member 130 is provided with a second receiving hole 115. The second elastic member 173 is located in the second receiving hole 115, so that the second pawl 171 is stably contracted under the pressure of the second locking portion 172, so that there is no conflict between the second pawl 171 and the second locking portion 172.

[0085] For further information, please refer to Figure 4 The second receiving hole 115 is disposed on the power member 110 , and an extension direction of the second receiving hole 115 on the power member 110 is inclined along the second direction.

[0086] In one embodiment, please refer to Figure 4 A second positioning block 1712 is provided on the second pawl 171 , and the second elastic member 173 is sleeved on the second positioning block 1712 , so that the second elastic member 173 is stably connected to the second pawl 171 .

[0087] In one embodiment, please refer to Figure 2 The knob assembly 100 further includes a third rotating shaft 180 and a transmission member 181. The transmission member 181 is wound around the second rotating shaft 150 and the third rotating shaft 180. The third rotating shaft 180 is used for transmission cooperation with the second filter screen 310 assembly. It can be seen that the second rotating shaft 150 is indirectly driven and cooperated with the second filter screen 310 assembly through the third rotating shaft 180, which facilitates the extension of the transmission of the second rotating shaft 150, so that the distribution of the second filter screen 310 structure is not limited to the position of the second rotating shaft 150.

[0088] Optionally, the transmission member 181 may be a transmission belt, a transmission chain, a belt with a rack, etc. When the transmission member 181 is a belt with a rack, the second rotating shaft 150 and the third rotating shaft 180 are both provided with a gear structure.

[0089] It should be noted that the coordination manner of the first rotating shaft 140 and the third rotating shaft 180 corresponding to the first filter screen 310 assembly and the second filter screen 310 assembly respectively should be understood as at least: the first rotating shaft 140 is coaxially plugged into the first roller 320 of the first filter screen 310 assembly; the third rotating shaft 180 is coaxially plugged into the first roller 320 of the second filter screen 310 assembly.

[0090] For further information, please refer to Figure 2 The third rotation axis 180 and the first rotation axis 140 are distributed on the same straight line.

[0091] In one embodiment, please refer to Figure 1 A knob 113 is provided on the power member 110 to facilitate the user's rotation operation.

[0092] In one embodiment, please refer to Figure 2, the first input member 120 is provided with a first transmission tooth 121. The first rotating shaft 140 is provided with a first thread 141 meshing with the first transmission tooth 121. The first thread 141 is spirally distributed along the axial direction of the first rotating shaft 140, so that the first input member 120 stably drives the first rotating shaft 140 to rotate. At the same time, it is also convenient to change the rotation direction between the first input member 120 and the first rotating shaft 140, so that the first rotating shaft 140 and the power member 110 are intersected and distributed.

[0093] Specifically, please refer to Figure 2 , the power member 110 and the first rotating shaft 140 are vertically distributed.

[0094] Of course, in other embodiments, both the first input member 120 and the first rotating shaft 140 are provided with conical teeth to achieve vertical rotation transmission.

[0095] In one embodiment, please refer to Figure 2 The second input member 130 is provided with a second transmission tooth 131, and the second rotating shaft 150 is provided with a second thread 151 meshing with the second transmission tooth 131. The second thread 151 is spirally distributed along the axial direction of the second rotating shaft 150, so that the second input member 130 can stably drive the second rotating shaft 150 to rotate. At the same time, it is also convenient to change the rotation transmission direction between the second input member 130 and the second rotating shaft 150, so that the second rotating shaft 150 and the power member 110 can be intersected.

[0096] Specifically, the power member 110 and the second rotating shaft 150 are vertically distributed.

[0097] Of course, in other embodiments, both the second input member 130 and the second rotating shaft 150 are provided with conical teeth to achieve vertical rotation transmission.

[0098] In one embodiment, please refer to Figure 6 , Figure 7 and Figure 8 , an air filter device, the air filter device includes a box body assembly 200, a first filter screen 310 assembly, a second filter screen 310 assembly and a knob assembly 100 in any of the above embodiments, the first filter screen 310 assembly, the second filter screen 310 assembly and the knob assembly 100 are all installed on the box body assembly 200, and the knob assembly 100 is located between the first filter screen 310 assembly and the second filter screen 310 assembly, the first rotating shaft 140 is in transmission cooperation with the first filter screen 310 assembly, and the second rotating shaft 150 is in transmission cooperation with the second filter screen 310 assembly.

[0099] The above-mentioned air filter device adopts the above-mentioned knob assembly 100. When it is necessary to replace the filter 310 in the first filter 310 assembly, the power member 110 is rotated along the first direction so that the power member 110 selectively drives the first input member 120 to rotate, and the second input member 130 does not move. At this time, the first rotating shaft 140 drives the first filter 310 assembly to rotate under the action of the first input member 120 to unfold the filter 310 in the first filter 310 assembly (i.e., unfold the filter 310 in the rolled-up state) to achieve the replacement of the filter 310 in the first filter 310 assembly. When it is necessary to replace the filter 310 in the second filter 310 assembly, the power member 110 is rotated along the second direction so that the power member 110 selectively drives the second input member 130 to rotate, and the first input member 120 does not move. At this time, the second rotating shaft 150, under the action of the second input member 130, drives the second filter 310 assembly to rotate, so as to unfold the filter 310 in the second filter 310 assembly (i.e., unfold the filter 310 in the rolled-up state), and realize the replacement of the filter 310 in the second filter 310 assembly. In this way, the rotating assembly rotates in different directions to individually control the replacement of the filter 310 in the first filter 310 assembly and the second filter 310 assembly, making the replacement operation of the filter 310 more targeted and flexible. At the same time, during the replacement process, the filter 310 can be replaced by rotating the power member 110 in the first direction or the second direction, and the left and right filters 310 can be replaced effectively and quickly, thereby improving its replacement efficiency. In addition, during the replacement process, the first rotating shaft drives the first filter 310 assembly to rotate, and the second rotating shaft drives the second filter 310 assembly to rotate, so as to unfold the filters 310 in the first filter 310 assembly and the second filter 310 assembly to achieve replacement, thereby quickly completing the replacement of the new filter 310 without disassembling the filter 310 structure, thereby saving the cost of replacing the filter 310.

[0100] For further information, please refer to Figure 6 The box body assembly 200 includes a first box body 210 and a second box body 220 that are adapted to each other. The first filter screen 310 assembly, the second filter screen 310 assembly and the knob assembly 100 are all installed between the first box body 210 and the second box body 220. Two air outlet holes 211 are arranged on the first box body 210, and air inlet holes 221 opposite to the air outlet holes 211 are arranged on the second box body 220.

[0101] Optionally, the first box body 210 and the second box body 220 may be connected by bolt connection, clamping, riveting, pin connection, welding, etc.

[0102] Specifically, please refer to Figure 6 The first box body 210 and the second box body 220 are detachably connected.

[0103] For further information, please refer to Fig. 9, a holder 212 is provided on the first box body 210. The holder 212 is used to support the filter 310 in the first filter 310 assembly and the second filter 310 assembly. In this way, the holder 212 is in close contact with the filter 310 during operation. When air blows toward the filter 310, the filter 310 is kept flat (not concave downward) to ensure the filtering effect of the filter 310.

[0104] In one embodiment, please refer to Figure 7 , the air inlet hole 221 is cut with a plane perpendicular to the center of the air inlet hole 221, and the cross-sectional area S obtained increases from the end of the air inlet hole 221 close to the first box body 210 to the end of the air inlet hole 221 away from the first box body 210. The increasing trend should be understood as: gradually increasing; or first increasing, then unchanged, and then increasing again. In this way, the hole wall of the air inlet hole 221 is arranged to be inclined and gathered from top to bottom, and the air first enters the filter screen 310 under the guidance of the hole wall of the air inlet hole 221. Compared with the upright design, the pressure loss and noise of the air filter device are effectively reduced.

[0105] Specifically, the air inlet hole 221 is cut with a plane perpendicular to the center of the air inlet hole 221 , and the cross-sectional area S obtained gradually increases from one end of the air inlet hole 221 close to the first box body 210 to the other end of the air inlet hole 221 away from the first box body 210 .

[0106] In one embodiment, please refer to Figure 7 A seal 230 is provided between the edge of the air inlet 221 and the filter 310. When working, the seal 230 is tightly attached to the filter 310 to ensure that the dirty air can only pass through the filter 310, and will not leak into the box assembly 200, causing the internal moving parts to get stuck. The seal 230 can be a sealing cotton.

[0107] In one embodiment, please refer to Fig.10 , the first filter screen 310 assembly and the second filter screen 310 assembly both include: a filter screen 310, a first roller 320 and a second roller 330. The filter screen 310 is used to purify the air before entering the combustion chamber. The first roller 320 and the second roller 330 are arranged in parallel and spaced apart. One end of the filter screen 310 is connected to the first roller 320, and the other end of the filter screen 310 is connected to the second roller 330, and at least a part of the filter screen 310 is wound around the second roller 330. When the first roller 320 rotates, a part of the filter screen 310 is rolled up on the first roller 320, and a part of the filter screen 310 is released from the second roller 330.

[0108] Since at least a portion of the filter 310 is wound around the second roller 330, that is, a portion of the filter 310 is pre-wound around the second roller 330, the portion of the filter 310 is always kept in an unused state due to being pre-wound and in a rolled-up state. When the portion of the filter 310 between the first roller 320 and the second roller 330 expires, the first roller 320 is rotated so that the portion that expires (that is, the portion of the old filter 310) is rolled up on the first roller 320. At this time, the portion pre-wound around the second roller 330 (that is, the portion of the new filter 310) is gradually rotated out of the second roller 330 under the traction of the first roller 320, so that the portion of the filter 310 moves to and is spread between the first roller 320 and the second roller 330, so as to quickly complete the replacement of the new filter 310 and the storage of the old filter 310 without disassembling the filter 310 structure, effectively saving the cost of replacing the filter 310. At the same time, the maintenance efficiency of the filter 310 is also effectively improved.

[0109] It should be noted that before assembling the first filter 310 assembly or the second filter 310 assembly, a portion of the filter 310 may be pre-wound on the first roller 320, so that when the filter 310 needs to be replaced, the user can rotate the first roller 320 forwards and backwards to rotate the portion of the new filter 310 between the first roller 320 and the second roller 330, so that the air before entering the combustion chamber can continue to be effectively purified between the first roller 320 and the second roller 330.

[0110] It should also be noted that the connection method of one end of the filter screen 310 on the first roller 320 can be but not limited to bolt connection, clamping, welding, pin connection, etc. Similarly, the connection method of one end of the filter screen 310 on the second roller 330 can also be but not limited to bolt connection, clamping, welding, pin connection, etc.

[0111] For further information, please refer to Fig.11 , the two opposite ends of the filter 310 are detachably connected to the first roller 320 and the second roller 330, respectively. It can be seen that the filter 310 can be detachably installed on both the first roller 320 and the second roller 330. When the service life of the entire filter 310 is terminated, the user can remove the filter 310 from the first roller 320 and the second roller 330, respectively, and only replace the filter 310 part, and reuse the first roller 320 and the second roller 330 and other structures, which greatly reduces the part of the filter 310 assembly that needs to be replaced, and further reduces the maintenance cost of the first filter 310 assembly or the second filter 310 assembly.

[0112] It should be noted that the "detachable connection" of this embodiment should be understood as: the removal of one end of the filter 310 from the first roller 320 or the second roller 330 is a non-destructive action, that is, the original connection structure function is maintained after removal, and the original connection relationship can be repeated. For example: the detachable connection can be but is not limited to bolt connection or clamping, etc.

[0113] For further information, please refer to Fig.12 , the first filter screen 310 assembly and the second filter screen 310 assembly both include a first clamping member 340. A first receiving groove 321 is provided on the first roller 320. The first clamping member 340 is used to clamp one end of the filter screen 310 in the first receiving groove 321. During assembly, one end of the filter screen 310 is inserted into the first receiving groove 321; then the first clamping member 340 is pressed into the first receiving groove 321, so that the extrusion force between the first clamping member 340 and the groove wall of the first receiving groove 321 of the filter screen 310 maintains a stable connection with the first roller 320. At the same time, since the connection of the filter screen 310 on the first roller 320 is realized by the first clamping member 340, when replacing the filter screen 310, it is only necessary to pull the first clamping member 340 out of the first receiving groove 321 to complete the removal of the filter screen 310, further improving the convenience of replacing the filter screen 310.

[0114] Optionally, the first pressing member 340 may be pressed in the first receiving groove 321 by bolt connection or clamping.

[0115] It should be noted that the appearance of the first pressing member 340 can be designed in various ways, for example, the first pressing member 340 can be a fan-shaped block structure, a square block structure, etc., which is not specifically limited here.

[0116] In one embodiment, please refer to Fig.12 The first receiving groove 321 is extended along the axial direction of the first roller 320. In this way, it is not only beneficial to enhance the bonding strength between the filter screen 310 and the first roller 320, but also beneficial for the first roller 320 to roll up the filter screen 310 better.

[0117] In one embodiment, please refer to Fig.13, the first filter screen 310 assembly and the second filter screen 310 assembly both further include a second pressing member 350. A second receiving groove 331 is provided on the second roller 330, and the second pressing member 350 is used to press one end of the filter screen 310 into the second receiving groove 331. In this way, during assembly, one end of the filter screen 310 is inserted into the second receiving groove 331; and then the second pressing member 350 is pressed into the second receiving groove 331, so that the extrusion force between the second pressing member 350 and the groove wall of the second receiving groove 331 of the filter screen 310 maintains a stable connection with the second roller 330. At the same time, since the connection of the filter screen 310 on the second roller 330 is realized by the second pressing member 350, when replacing the filter screen 310, it is only necessary to pull the second pressing member 350 out of the second receiving groove 331 to complete the removal of the filter screen 310, further improving the convenience of replacing the filter screen 310.

[0118] Optionally, the second pressing member 350 may be pressed in the second receiving groove 331 by bolt connection or clamping.

[0119] It should be noted that the appearance of the first pressing member 340 can be designed in various ways, for example, the first pressing member 340 can be a fan-shaped block structure, a square block structure, etc., which is not specifically limited here.

[0120] For further information, please refer to Fig.13 The second receiving groove 331 is extended along the axial direction of the second roller 330 .

[0121] In one embodiment, a first support portion 322 and a second support portion 323 are provided on the first roller 320. The first support portion 322 and the second support portion 323 are spaced apart along the axial direction of the first roller 320 and are respectively located on opposite sides of the filter screen 310. In this way, the filter screen 310 is stored between the first support portion 322 and the second support portion 323 by using the first support portion 322 and the second support portion 323 on both sides, so as to prevent the filter screen 310 from being axially offset and stuck in the movable mechanism when being rolled up or released, thereby ensuring smooth replacement of the filter screen 310.

[0122] It should be noted that the first support portion 322 and the second support portion 323 may be annular protruding structures on the first roller 320 ; or may be structures such as washers installed on the first roller 320 .

[0123] For further information, please refer to Fig.10 The first supporting portion 322 and the second supporting portion 323 are both extended along the circumference of the first roller 320 to form an annular structure.

[0124] In one embodiment, please refer to Fig.10The second roller 330 is provided with a third support portion 332 and a fourth support portion 333, which are spaced apart along the axial direction of the second roller 330 and are respectively located on opposite sides of the filter 310. In this way, the filter 310 is stored between the third support portion 332 and the fourth support portion 333 by using the third support portion 332 and the fourth support portion 333 on both sides, so as to prevent the filter 310 from being stuck in the movable mechanism due to axial deviation when rolling or releasing, and ensure smooth replacement of the filter 310.

[0125] It should be noted that the third support portion 332 and the fourth support portion 333 may be annular protruding structures on the second roller 330 ; or may be structures such as washers installed on the second roller 330 .

[0126] For further information, please refer to Fig.10 The third support portion 332 and the fourth support portion 333 are both extended along the circumference of the second roller 330 to form an annular structure.

[0127] In one embodiment, please refer to Fig.10 The first roller 320 is provided with a transmission part 324. The transmission part 324 is used for transmission cooperation with the first rotating shaft 140 or the second rotating shaft 150, so that the knob assembly 100 can rotate the first roller 320 better.

[0128] Optionally, the transmission part 324 may be a protrusion structure, such as a triangular protrusion, a quadrilateral protrusion, a pentagonal protrusion, an elliptical protrusion, etc. In this case, the knob assembly 100 has a groove structure adapted thereto. Of course, the transmission part 324 may also be a groove structure, such as a triangular groove, a quadrilateral groove, a pentagonal groove, an elliptical groove, etc. In this case, the knob assembly 100 has a protrusion structure adapted thereto.

[0129] In one embodiment, please refer to Fig.14 , a wall-mounted boiler, characterized in that the wall-mounted boiler includes the air filtering device in any one of the above embodiments.

[0130] The above-mentioned wall-mounted boiler adopts the above-mentioned knob assembly 100. When it is necessary to replace the filter 310 in the first filter 310 assembly, the power member 110 is rotated along the first direction so that the power member 110 selectively drives the first input member 120 to rotate, and the second input member 130 does not move. At this time, the first rotating shaft 140 drives the first filter 310 assembly to rotate under the action of the first input member 120 to unfold the filter 310 in the first filter 310 assembly (i.e., unfold the filter 310 in the rolled-up state) to achieve the replacement of the filter 310 in the first filter 310 assembly. When it is necessary to replace the filter 310 in the second filter 310 assembly, the power member 110 is rotated along the second direction so that the power member 110 selectively drives the second input member 130 to rotate, and the first input member 120 does not move. At this time, the second rotating shaft 150, under the action of the second input member 130, drives the second filter 310 assembly to rotate, so as to unfold the filter 310 in the second filter 310 assembly (i.e., unfold the filter 310 in the rolled-up state), and realize the replacement of the filter 310 in the second filter 310 assembly. In this way, the rotating assembly rotates in different directions to individually control the replacement of the filter 310 in the first filter 310 assembly and the second filter 310 assembly, making the replacement operation of the filter 310 more targeted and flexible. At the same time, during the replacement process, the filter 310 can be replaced by rotating the power member 110 in the first direction or the second direction, and the left and right filters 310 can be replaced effectively and quickly, thereby improving its replacement efficiency. In addition, during the replacement process, the first rotating shaft drives the first filter 310 assembly to rotate, and the second rotating shaft drives the second filter 310 assembly to rotate, so as to unfold the filters 310 in the first filter 310 assembly and the second filter 310 assembly to achieve replacement, thereby quickly completing the replacement of the new filter 310 without disassembling the filter 310 structure, thereby saving the cost of replacing the filter 310.

[0131] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0132] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0133] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0134] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A knob assembly, characterized in that: The knob assembly (100) comprises: A power member (110) having a knob (113) disposed thereon; a first input member (120) and a second input member (130), wherein the first input member (120) and the second input member (130) are sleeved on the power member (110) at an interval, and when the power member (110) rotates along a first direction, one of the first input member (120) can be driven to rotate, and when the power member (110) rotates along a second direction, one of the second input member (130) can be driven to rotate, and the first direction is opposite to the second direction; The first rotating shaft (140) and the second rotating shaft (150), the first input member (120) and the second input member (130) are respectively corresponding to the first rotating shaft (140) and the second rotating shaft (150) for transmission cooperation, the first rotating shaft (140) is used to drive the first roller (320) of the first filter assembly (300) to rotate, and the second rotating shaft (150) is used to drive the first roller (320) of the second filter assembly (400) to rotate, and when the first roller (320) rotates, a part of the filter (310) is rolled up on the first roller (320). The filter screen (310) is partially released from the second roller (330), wherein the first filter screen assembly (300) and the second filter screen assembly (400) both comprise: the filter screen (310), the first roller (320) and the second roller (330) arranged in parallel and spaced relation, one end of the filter screen (310) is connected to the first roller (320), the other end of the filter screen (310) is connected to the second roller (330), and at least a portion of the filter screen (310) is wound around the second roller (330); The knob assembly (100) further comprises a first one-way structure (160), wherein the first one-way structure (160) is disposed between the first input member (120) and the power member (110); when the power member (110) rotates along the first direction, the power member (110) contacts and cooperates with the first input member (120) through the first one-way structure (160); and when the power member (110) rotates along the second direction, the power member (110) is disconnected from contact with the first input member (120) through the first one-way structure (160); The knob assembly (100) further comprises a second one-way structure (170), wherein the second one-way structure (170) is arranged between the second input member (130) and the power member (110); when the power member (110) rotates along the second direction, the power member (110) contacts and cooperates with the second input member (130) through the second one-way structure (170); and when the power member (110) rotates along the first direction, the power member (110) is disconnected from contact with the second input member (130) through the second one-way structure (170).

2. The knob assembly according to claim 1, characterized in that: The first one-way structure (160) includes a first pawl (161), a first locking portion (162) and a first elastic member (163). Between the power member (110) and the first input member (120), the first pawl (161) is arranged on one of them through the first elastic member (163), and the first locking portion (162) is arranged on the other. When the power member (110) rotates along the first direction, the first pawl (161) abuts against the first locking portion (162). When the power member (110) rotates along the second direction, the first locking portion (162) pushes the first pawl (161) and slides with the first pawl (161).

3. The knob assembly according to claim 2, characterized in that: The first locking portion (162) is provided with a first contact surface (1621) and a first guide sliding surface (1622). The first guide sliding surface (1622) and the first contact surface (1621) are sequentially distributed along the first direction on the first locking portion (162). When the power member (110) rotates along the first direction, the first pawl (161) contacts the first contact surface (1621). When the power member (110) rotates along the second direction, the first guide sliding surface (1622) pushes the first pawl (161) and slides with the first pawl (161).

4. The knob assembly according to claim 2, characterized in that: The power member (110) or the first input member (120) is provided with a first receiving hole (114), and the first elastic member (163) is located in the first receiving hole (114).

5. The knob assembly according to any one of claims 1 to 4, characterized in that: The second one-way structure (170) includes a second pawl (171), a second locking portion (172) and a second elastic member (173). Between the power member (110) and the second input member (130), the second pawl (171) is arranged on one of them through the second elastic member (173), and the second locking portion (172) is arranged on the other. When the power member (110) rotates along the second direction, the second pawl (171) abuts against the second locking portion (172). When the power member (110) rotates along the first direction, the second locking portion (172) pushes the second pawl (171) and slides with the second pawl (171).

6. The knob assembly according to any one of claims 1 to 4, characterized in that: The knob assembly (100) further comprises a third rotating shaft (180) and a transmission member (181), wherein the transmission member (181) is arranged around the second rotating shaft (150) and the third rotating shaft (180), and the third rotating shaft (180) is used for transmission cooperation with the second filter assembly (400).

7. The knob assembly according to any one of claims 1 to 4, characterized in that: The first input member (120) is provided with a first transmission tooth (121), and the first rotating shaft (140) is provided with a first thread (141) meshing with the first transmission tooth (121).

8. The knob assembly according to any one of claims 1 to 4, characterized in that: The second input member (130) is provided with a second transmission tooth (131), and the second rotating shaft (150) is provided with a second thread (151) meshing with the second transmission tooth (131).

9. An air filter device, characterized in that: The air filtering device comprises a box body assembly (200), a first filter assembly (300), a second filter assembly (400) and a knob assembly (100) according to any one of claims 1 to 8, wherein the first filter assembly (300), the second filter assembly (400) and the knob assembly (100) are all mounted on the box body assembly (200), and the knob assembly (100) is located between the first filter assembly (300) and the second filter assembly (400), the first rotating shaft (140) is in transmission cooperation with the first filter assembly (300), and the second rotating shaft (150) is in transmission cooperation with the second filter assembly (400).

10. The air filter device according to claim 9, characterized in that: The box body assembly (200) comprises a first box body (210) and a second box body (220) adapted to each other; the first filter assembly (300), the second filter assembly (400) and the knob assembly (100) are all installed between the first box body (210) and the second box body (220); two air outlet holes (211) are arranged at intervals on the first box body (210); and air inlet holes (221) opposite to the air outlet holes (211) are arranged at intervals on the second box body (220).

11. The air filter device according to claim 10, characterized in that: The first box body (210) is provided with a retaining frame (212), and the retaining frame (212) is used to support the filter screens (310) in the first filter screen assembly (300) and the second filter screen assembly (400); and / or, The air inlet hole (221) is cut with a plane perpendicular to the center of the air inlet hole (221), and the cross-sectional area S obtained shows an increasing trend from one end of the air inlet hole (221) close to the first box body (210) to one end of the air inlet hole (221) far from the first box body (210).

12. A wall-mounted boiler, characterized in that: The wall-mounted boiler comprises the air filtering device according to any one of claims 9 to 11.

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