Throttle device and air conditioning system having the same

Abstract

The present application provides a throttling device, including: a valve seat, a throttling hole and an adjusting mechanism, wherein the throttling hole is arranged on the valve seat; the adjusting mechanism includes a shielding part; the shielding part completely or partially shields the throttling hole as the first position, and the shielding part avoids the throttling hole as the second position; the shielding part is movable between the first position and the second position. According to the throttling device of the present application and the air conditioning system having the same, the shielding part is movable between the first position and the second position to adjust the aperture of the throttling hole, which solves the problem that the throttling aperture of the traditional throttling device is fixed, which makes the throttling device low energy and low efficiency under different working conditions.

Description

Technical Field

[0001] The present application belongs to the technical field of air conditioners, and in particular relates to a throttling device and an air conditioning system having the same. Background Art

[0002] At present, electric throttle valves are used in large air conditioner units. Although they are accurate in control, they are bulky and costly. The throttle aperture of existing throttling devices is constant and cannot be adjusted, making it difficult to adapt to a wide range of cooling capacity adjustment requirements. The use of throttle apertures with fixed apertures has better energy efficiency under nominal cooling conditions, but the actual units are not operated under nominal conditions, and the throttling requirements and the aperture of the throttle aperture do not match, resulting in a low energy efficiency coefficient.

[0003] Therefore, how to provide a throttling device with an adjustable throttling aperture and an air conditioning system having the same has become a problem that technicians in this field urgently need to solve. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present application is to provide a throttling device and an air-conditioning system having the same, wherein the throttling aperture of the throttling device is adjustable.

[0005] In order to solve the above problems, the present application provides a throttling device, comprising:

[0006] Valve seat;

[0007] A throttle hole, wherein the throttle hole is arranged on the valve seat;

[0008] The regulating mechanism comprises a shielding part; the shielding part completely or partially shields the throttle hole as the first position, and the shielding part avoids the throttle hole as the second position; the shielding part is movable between the first position and the second position.

[0009] Preferably, a movable hole is provided on the valve seat, the movable hole is connected to the throttling hole, and the shielding portion is located in the movable hole;

[0010] And / or, the adjustment mechanism further comprises a first transmission part; a first toggle part is arranged on the shielding part, and a second toggle part is arranged on the first transmission part; the first toggle part is meshed with the second toggle part;

[0011] And / or, the adjustment mechanism further includes a limiting portion, which is used to limit the movement of the shielding portion;

[0012] And / or, the adjustment mechanism further includes a scale portion, the scale portion being used to indicate an active position of the shielding portion;

[0013] And / or, there are two adjusting mechanisms, and the two adjusting mechanisms are symmetrical about the central axis of the throttle hole; or, there are multiple adjusting mechanisms, and the multiple adjusting mechanisms are circumferentially arranged around the central axis of the throttle hole.

[0014] Preferably, a mounting groove is provided on the outer peripheral wall of the valve seat; the movable port is connected to the mounting groove; and the first transmission part is arranged in the mounting groove;

[0015] And / or, the adjustment mechanism further includes a second transmission part; a fourth toggle part is further provided on the first transmission part; a third toggle part is provided on the second transmission part, and the third toggle part is meshed with the fourth toggle part.

[0016] Preferably, a mounting cover is provided on the outer peripheral wall of the valve seat, and the mounting cover is arranged outside the mounting groove.

[0017] Preferably, the second transmission part is arranged in the mounting cover.

[0018] Preferably, a mounting portion is provided in the mounting cover; the second transmission portion is mounted on the mounting portion;

[0019] And / or, the first transmission part includes a first adjusting rod, and the second toggle part and the fourth toggle part are both arranged on the first adjusting rod;

[0020] And / or, the second transmission part includes a second adjusting rod, and the third toggle part is arranged on the second adjusting rod.

[0021] Preferably, the fourth shifting part is a first gear, and the first gear is sleeved outside the first adjusting rod;

[0022] And / or, the third shifting part is a second gear, and the second gear is sleeved outside the second adjusting rod;

[0023] And / or, the second shifting portion includes a plurality of helical teeth; the plurality of helical teeth are all disposed on the outer surface of the first adjusting rod and are arranged sequentially in the axial direction of the first adjusting rod;

[0024] and / or, the first toggle portion comprises a plurality of straight teeth;

[0025] And / or, an adjustment through hole is opened on the mounting cover; the first end of the second adjustment rod passes through the adjustment through hole and extends to the outside of the mounting cover;

[0026] And / or, the scale portion is arranged on the first adjusting rod; and the scales on the scale portion are arranged around the circumference of the first adjusting rod;

[0027] and / or, the extension direction of the first adjusting rod is parallel to the central axis of the throttle hole;

[0028] And / or, the extension direction of the second adjusting rod is parallel to the central axis of the throttle hole.

[0029] Preferably, the adjustment mechanism further comprises a supporting portion; the supporting portion is arranged at a notch of the mounting slot, and the first transmission portion is mounted on the supporting portion.

[0030] Preferably, a first rotation groove and a second rotation groove are provided on the side wall of the installation groove; the openings of the first rotation groove and the second rotation groove face each other; the first end of the first adjustment rod is arranged in the first rotation groove, and the second end of the first adjustment rod is arranged in the second rotation groove.

[0031] Preferably, a first notch is provided on the side wall of the first rotation groove; the position of the first notch corresponds to the opening of the installation groove; a first limiting portion is provided on the support portion; the first limiting portion is arranged in the first notch, and the first limiting portion is in contact with the first adjustment rod;

[0032] And / or, a second notch is provided on the side wall of the second rotation groove; the position of the second notch corresponds to the opening of the installation groove; a second limiting portion is provided on the support portion; the second limiting portion is arranged in the second notch, and the second limiting portion is in contact with the first adjustment rod;

[0033] And / or, a first axial stop portion is provided on the first adjustment rod, the first axial stop portion is in contact with the side wall of the installation groove, and the position of the first axial stop portion corresponds to the opening of the first rotation groove;

[0034] And / or, a second axial stop portion is provided on the first adjustment rod, the second axial stop portion is in contact with the side wall of the installation groove, and the position of the second axial stop portion corresponds to the opening of the second rotation groove;

[0035] And / or, a gear through hole is formed in the support portion, and the first gear is arranged in the gear through hole;

[0036] And / or, the support portion is provided with a support leg; the first end of the support leg is connected to the support portion, and the second end of the support leg is in contact with the bottom of the installation groove.

[0037] Preferably, the installation portion is arranged at the bottom of the installation cover; an installation through hole is formed in the installation portion, and the second adjustment rod passes through the installation through hole; and a first stop flange is arranged at the second end of the second adjustment rod.

[0038] Preferably, an elastic member is arranged between the first stop flange and the installation portion.

[0039] Preferably, the limiting portion includes a limiting groove and a limiting post; the limiting groove is arranged on the surface of the installation portion close to the first end of the second adjustment rod; a limiting post is arranged on the outer surface of the second adjustment rod, and the limiting post is adapted to the limiting groove.

[0040] Preferably, the number of the limiting posts is set to be multiple, and the multiple limiting posts are arranged circumferentially around the second adjustment rod; on the installation portion; the number of the limiting grooves is set to be multiple, and the positions, layouts and numbers of the limiting grooves correspond to those of the limiting posts; and any limiting post is adapted to any limiting groove;

[0041] And / or, a boss is provided on the second adjusting rod, the boss is an annular boss circumferentially arranged around the second adjusting rod, the limiting column is provided on the boss, and the limiting column extends in a direction close to the bottom of the limiting groove;

[0042] And / or, a second stop flange is provided at the first end of the second adjusting rod;

[0043] And / or, the elastic member is in a compressed state.

[0044] Preferably, the mounting cover is made of a transparent material; or, a transparent area is provided on the mounting cover, and the position of the transparent area corresponds to the position of the scale portion.

[0045] According to another aspect of the present application, an air conditioning system is provided, comprising a throttling device, wherein the throttling device is the throttling device described above.

[0046] The throttling device and the air-conditioning system having the same provided by the present application have a shielding part that moves between a first position and a second position to adjust the aperture of the throttling hole, thereby solving the problem that the throttling aperture of the traditional throttling device is fixed, resulting in low energy and low efficiency of the throttling device under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A cross-sectional view of a throttling device according to an embodiment of the present application;

[0048] Figure 2 A cross-sectional view of a valve seat according to an embodiment of the present application;

[0049] Figure 3 This is a schematic structural diagram of the first transmission part of an embodiment of the present application;

[0050] Figure 4 This is a schematic structural diagram of a second transmission part according to an embodiment of the present application;

[0051] Figure 5 This is a schematic diagram of the structure of the throttling device of an embodiment of the present application.

[0052] The reference numerals are as follows:

[0053] 1. Valve seat; 2. Throttle hole; 31. Shielding part; 32. First toggle part; 4. First transmission part; 41. First adjusting rod; 42. Second toggle part; 43. Fourth toggle part; 44. Scale part; 5. Second transmission part; 51. Second adjusting rod; 52. Third toggle part; 53. First stop flange; 54. Limiting column; 55. Second stop flange; 6. Mounting groove; 7. Support part; 8. Mounting cover; 81. Mounting part; 82. Transparent area; 9. Movable hole. DETAILED DESCRIPTION

[0054] See also Figure 1As shown, according to an embodiment of the present application, a throttling device includes: a valve seat 1, a throttling hole 2 and an adjusting mechanism, wherein the throttling hole 2 is arranged on the valve seat 1; the adjusting mechanism includes a shielding portion 31; the shielding portion 31 completely or partially blocks the throttling hole 2 as a first position, and the shielding portion 31 avoids the throttling hole 2 as a second position; the shielding portion 31 is movable between the first position and the second position, and during the movement, the aperture of the throttling hole 2 is adjusted, which solves the problem that the throttling aperture of a traditional throttling device is fixed, resulting in low energy and low efficiency of the throttling device under different working conditions. Taking the aperture of the throttling hole 2 as d, the present application can achieve the adjustment of the throttling aperture from 10%d to 100%d.

[0055] Furthermore, a movable hole 9 is provided on the valve seat 1, the movable hole 9 is communicated with the throttle hole 2, and the shielding portion 31 is located in the movable hole 9;

[0056] And / or, the adjustment mechanism further includes a first transmission part 4; a first toggle part 32 is provided on the shielding part 31, and a second toggle part 42 is provided on the first transmission part 4; the first toggle part 32 is meshed with the second toggle;

[0057] And / or, the adjustment mechanism further includes a limiting portion, which is used to limit the movement of the shielding portion 31;

[0058] And / or, the adjustment mechanism further includes a scale portion 44, and the scale portion 44 is used to indicate the active position of the shielding portion 31;

[0059] And / or, there are two adjusting mechanisms, and the two adjusting mechanisms are symmetrical about the central axis of the throttle hole 2; or, there are multiple adjusting mechanisms, and the multiple adjusting mechanisms are circumferentially arranged around the central axis of the throttle hole 2.

[0060] Furthermore, a mounting groove 6 is provided on the outer peripheral wall of the valve seat 1; the movable opening is connected to the mounting groove 6; the first transmission part 4 is arranged in the mounting groove 6, and the first transmission part 4 can be connected to the motor to drive the first transmission part 4 to rotate, thereby driving the shielding part 31 to move, or the throttling aperture can be manually adjusted steplessly through a mechanical gear linkage mechanism, so as to expand the cooling capacity adjustment range and meet the mechanical adjustment of the air conditioner without electric control; for example, a person can put his hand into the mounting groove 6 to rotate the first transmission part 4;

[0061] And / or, the adjustment mechanism further includes a second transmission part 5; a fourth toggle part 43 is further provided on the first transmission part 4; a third toggle part 52 is provided on the second transmission part 5, the third toggle part 52 is meshed with the fourth toggle part 43, and the second transmission part 5 can also be rotated manually.

[0062] Furthermore, a mounting cover 8 is provided on the outer peripheral wall of the valve seat 1 , and the mounting cover 8 is arranged outside the mounting groove 6 .

[0063] Furthermore, the second transmission part 5 is disposed in the mounting cover 8 .

[0064] Furthermore, a mounting portion 81 is provided in the mounting cover 8; the second transmission portion 5 is mounted on the mounting portion 81;

[0065] And / or, the first transmission part 4 includes a first adjusting rod 41, and the second toggle part 42 and the fourth toggle part 43 are both arranged on the first adjusting rod 41;

[0066] And / or, the second transmission part 5 includes a second adjusting rod 51 , and the third shifting part 52 is disposed on the second adjusting rod 51 .

[0067] See also Figures 2 - 4 As shown, the present application also discloses some embodiments, the fourth shifting portion 43 is a first gear, and the first gear is sleeved outside the first adjusting rod 41;

[0068] And / or, the third shifting portion 52 is a second gear, and the second gear is sleeved outside the second adjusting rod 51;

[0069] And / or, the second shifting portion 42 includes a plurality of helical teeth; the plurality of helical teeth are all disposed on the outer surface of the first adjusting rod 41 and are arranged sequentially in the axial direction of the first adjusting rod 41;

[0070] and / or, the first toggle portion 32 includes a plurality of straight teeth;

[0071] And / or, an adjustment through hole is provided on the mounting cover 8; the first end of the second adjustment rod 51 passes through the adjustment through hole and extends outside the mounting cover 8, and the user can manually move the second adjustment rod to drive the first transmission part, and finally drive the shielding part 31 to move;

[0072] And / or, the scale portion 44 is disposed on the first adjusting rod 41; and the scales on the scale portion 44 are disposed around the circumference of the first adjusting rod 41;

[0073] and / or, the extension direction of the first adjusting rod 41 is parallel to the central axis of the throttle hole 2;

[0074] And / or, the extension direction of the second adjusting rod 51 is parallel to the central axis of the throttling hole 2, the second toggle part 42 includes a plurality of helical teeth, and the first toggle part 32 is a straight tooth, and the two cooperate with each other so that the axially extending first adjusting rod 41 can drive the shielding part 31 to move radially or at other angles, thereby covering the throttling hole diameter of the cover plate.

[0075] Furthermore, the adjustment mechanism further includes a support portion 7 ; the support portion 7 is disposed at a notch of the mounting slot 6 , and the first transmission portion 4 is mounted on the support portion 7 .

[0076] Further, a first rotating groove and a second rotating groove are provided on the side wall of the mounting groove 6; the openings of the first rotating groove and the second rotating groove face each other; the first end of the first adjusting rod 41 is arranged in the first rotating groove, and the second end of the first adjusting rod 41 is arranged in the second rotating groove.

[0077] Further, a first notch is provided on the side wall of the first rotating groove; the position of the first notch corresponds to the opening of the mounting groove 6; a first limiting portion is provided on the supporting portion 7; the first limiting portion is arranged in the first notch and is in contact with the first adjusting rod 41;

[0078] And / or, a second notch is provided on the side wall of the second rotating groove; the position of the second notch corresponds to the opening of the mounting groove 6; a second limiting portion is provided on the supporting portion 7; the second limiting portion is arranged in the second notch and is in contact with the first adjusting rod 41. During installation, the first adjusting rod 41 can be directly placed on the side walls of the first rotating groove and the second rotating groove through the first notch and the second notch; then the supporting portion 7 is installed. During installation, first, the first limiting portion and the second limiting portion are inserted into the notches and are in contact with the first adjusting rod 41, and then the supporting portion 7 is fixed to the valve seat 1. At this time, the first limiting portion and the second limiting portion cooperate with the first rotating groove and the second rotating groove respectively, so that the first adjusting rod 41 is limited in the radial direction, ensuring the stability of its transmission, and the installation is convenient and the operation is simple.

[0079] And / or, a first axial stop portion is provided on the first adjusting rod 41, the first axial stop portion is in contact with the side wall of the mounting groove 6, and the position of the first axial stop portion corresponds to the opening of the first rotating groove;

[0080] And / or, a second axial stop portion is provided on the first adjusting rod 41, the second axial stop portion is in contact with the side wall of the mounting groove 6, and the position of the second axial stop portion corresponds to the opening of the second rotating groove, which can prevent the first adjusting rod 41 from moving axially and affecting the transmission stability;

[0081] And / or, a gear through hole is provided on the supporting portion 7, and the first gear is arranged in the gear through hole, which can ensure the effective meshing of the second gear and the first gear;

[0082] And / or, a supporting leg is provided on the supporting portion 7; the first end of the supporting leg is connected to the supporting portion 7, and the second end of the supporting leg is in contact with the bottom of the mounting groove 6, making the installation of the supporting portion 7 more stable and further ensuring the stability of the transmission.

[0083] Further, the mounting portion 81 is arranged at the bottom of the mounting cover 8; a mounting through hole is provided on the mounting portion 81, and the second adjusting rod 51 passes through the mounting through hole; and a first stop flange 53 is provided at the second end of the second adjusting rod 51.

[0084] Further, an elastic member is disposed between the first stop flange 53 and the mounting portion 81.

[0085] Further, the limiting portion includes a limiting groove and a limiting post 54; the limiting groove is disposed on the surface of the mounting portion 81 near the first end of the second adjusting rod 51; the limiting post 54 is disposed on the outer surface of the second adjusting rod 51, and the limiting post 54 is adapted to the limiting groove.

[0086] Further, the number of the limiting posts 54 is set to be plural, and the plural limiting posts 54 are circumferentially disposed around the second adjusting rod 51; the number of the limiting grooves is set to be plural, and the positions, layouts and numbers of the limiting grooves correspond to those of the limiting posts 54; and any limiting post 54 is adapted to any limiting groove;

[0087] And / or, a boss is disposed on the second adjusting rod 51, the boss is an annular boss circumferentially disposed around the second adjusting rod 51, the limiting post 54 is disposed on the boss, and the limiting post 54 extends towards the bottom of the limiting groove;

[0088] And / or, a second stop flange 55 is disposed at the first end of the second adjusting rod 51;

[0089] And / or, the elastic member is in a compressed state. When the position of the shielding portion needs to be adjusted, the second stop flange 55 can be held by hand, the second adjusting rod 51 is pulled outwards, the elastic member is further compressed, so that the limiting post 54 is disengaged from the limiting groove, and then the second adjusting rod 51 is rotated by holding the second stop flange 55 by hand, so that the first gear and the second gear are meshed and driven, and at the same time, the spiral teeth on the first adjusting rod 41 and the positive teeth on the shielding portion 31 are meshed and rotated, so that the shielding portion 31 moves, and further the throttle aperture is adjusted; the scale on the scale portion 44 is observed through the transparent mounting cover 8 or the transparent area 82, and the rotation is stopped at the required position, and then slightly moved inwards at this position, so that the elastic member is slightly relaxed, and at the same time, the limiting post 54 enters the limiting groove at the corresponding position, meeting the requirement of short-term reliable operation in a mechanical control mode after the control system fails.

[0090] Referring to Figure 5 As shown, the present application also discloses some embodiments. The mounting cover 8 is made of a transparent material; or, a transparent area 82 is disposed on the mounting cover 8, and the position of the transparent area 82 corresponds to the position of the scale portion 44, so that the scale value on the scale portion 44 can be observed, and further the position of the shielding portion 31 can be known, and then the throttle aperture can be determined.

[0091] According to an embodiment of the present application, an air conditioning system includes a throttling device, and the throttling device is the above-mentioned throttling device.

[0092] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above advantageous manners can be freely combined and superimposed.

[0093] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and variations can be made without departing from the technical principle of the present application, and these improvements and variations should also be regarded as within the protection scope of the present application.

Claims

1. A throttling device, It is characterized in that include: Valve seat (1); A throttle hole (2), wherein the throttle hole (2) is arranged on the valve seat (1); An adjustment mechanism, the adjustment mechanism comprising a shielding portion (31); a first position in which the shielding portion (31) completely or partially shields the throttle hole (2); and a second position in which the shielding portion (31) avoids the throttle hole (2); the shielding portion (31) is movable between the first position and the second position; The adjustment mechanism further comprises a first transmission part (4) and a second transmission part (5); a first toggle part (32) is provided on the shielding part (31), and a second toggle part (42) is provided on the first transmission part (4); the first toggle part (32) is meshed with the second toggle part (42); The first toggle portion (32) comprises a plurality of straight teeth; the first transmission portion (4) comprises a first adjustment rod (41); the second toggle portion (42) comprises a plurality of helical teeth; the plurality of helical teeth are all provided on the outer surface of the first adjustment rod (41) and are arranged in sequence in the axial direction of the first adjustment rod (41); The first transmission part (4) is also provided with a fourth toggle part (43); the second transmission part (5) is provided with a third toggle part (52), and the third toggle part (52) is meshed with the fourth toggle part (43); The second transmission part (5) comprises a second adjusting rod (51), the third shifting part (52) is arranged on the second adjusting rod (51); the second end of the second adjusting rod (51) is provided with a first stop flange (53); the first end of the second adjusting rod (51) is provided with a second stop flange (55); A mounting cover (8) is provided on the outer peripheral wall of the valve seat (1); a mounting portion (81) is provided inside the mounting cover (8); an elastic member is provided between the first stop flange (53) and the mounting portion (81); and the elastic member is in a compressed state.

2. The throttling device according to claim 1, It is characterized in that The valve seat (1) is provided with a movable hole (9), the movable hole (9) is in communication with the throttle hole (2), and the shielding portion (31) is located inside the movable hole (9); And / or, the adjustment mechanism further comprises a limiting portion, the limiting portion being used to limit the movement of the shielding portion (31); And / or, the adjustment mechanism further comprises a scale portion (44), wherein the scale portion (44) is used to indicate an active position of the shielding portion (31); And / or, the number of the adjustment mechanisms is two, and the two adjustment mechanisms are symmetrical about the central axis of the throttle hole (2); or, the number of the adjustment mechanisms is multiple, and the multiple adjustment mechanisms are circumferentially arranged around the central axis of the throttle hole (2).

3. The throttling device according to claim 2, It is characterized in that An installation groove (6) is provided on the outer peripheral wall of the valve seat (1); the movable hole (9) is connected to the installation groove (6); and the first transmission part (4) is arranged in the installation groove (6).

4. The throttling device according to claim 3, It is characterized in that The mounting cover (8) is arranged outside the mounting groove (6).

5. The throttling device according to claim 4, It is characterized in that The second transmission part (5) is arranged in the mounting cover (8).

6. The throttling device according to claim 5, It is characterized in that The second transmission part (5) is mounted on the mounting part (81); And / or, the second toggle portion (42) and the fourth toggle portion (43) are both arranged on the first adjusting rod (41).

7. The throttling device according to claim 6, It is characterized in that The fourth shifting portion (43) is a first gear, and the first gear is sleeved outside the first adjusting rod (41); And / or, the third shifting portion (52) is a second gear, and the second gear is sleeved outside the second adjusting rod (51); And / or, an adjustment through hole is provided on the mounting cover (8); the first end of the second adjustment rod (51) passes through the adjustment through hole and extends to the outside of the mounting cover (8); And / or, the scale portion (44) is arranged on the first adjusting rod (41); and the scales on the scale portion (44) are arranged around the circumference of the first adjusting rod (41); And / or, the extension direction of the first adjustment rod (41) is parallel to the central axis of the throttle hole (2); And / or, the extension direction of the second adjustment rod (51) is parallel to the central axis of the throttle hole (2).

8. The throttling device according to claim 7, It is characterized in that The adjustment mechanism further comprises a support portion (7); the support portion (7) is arranged at a notch of the installation slot (6), and the first transmission portion (4) is mounted on the support portion (7).

9. The throttling device according to claim 8, It is characterized in that A first rotation groove and a second rotation groove are provided on the side wall of the installation groove (6); the notches of the first rotation groove and the second rotation groove are opposite to each other; the first end of the first adjustment rod (41) is arranged in the first rotation groove, and the second end of the first adjustment rod (41) is arranged in the second rotation groove.

10. The throttling device according to claim 9, It is characterized in that A first notch is provided on the side wall of the first rotating groove; the position of the first notch corresponds to the notch of the mounting groove (6); a first limiting portion is provided on the supporting portion (7); the first limiting portion is arranged in the first notch, and the first limiting portion is in contact with the first adjusting rod (41); And / or, a second notch is provided on the side wall of the second rotating groove; the position of the second notch corresponds to the notch of the mounting groove (6); a second limiting portion is provided on the support portion (7); the second limiting portion is provided in the second notch, and the second limiting portion is in contact with the first adjusting rod (41); And / or, a first axial stop portion is provided on the first adjusting rod (41), the first axial stop portion is in contact with the side wall of the mounting groove (6), and the position of the first axial stop portion corresponds to the notch of the first rotation groove; And / or, a second axial stop portion is provided on the first adjusting rod (41), the second axial stop portion is in contact with the side wall of the mounting groove (6), and the position of the second axial stop portion corresponds to the notch of the second rotation groove; And / or, a gear through hole is formed in the support portion (7), and the first gear is disposed in the gear through hole; And / or, a support leg is provided on the support portion (7); a first end of the support leg is connected to the support portion (7), and a second end of the support leg is in contact with the bottom of the mounting groove (6).

11. The throttling device according to claim 6, wherein, The mounting portion (81) is disposed at the bottom of the mounting cover (8); a mounting through hole is formed in the mounting portion (81), and the second adjusting rod (51) passes through the mounting through hole.

12. The throttling device according to claim 11, wherein, The limiting portion includes a limiting groove and a limiting post (54); the limiting groove is disposed on the surface of the mounting portion (81) near the first end portion of the second adjusting rod (51); a limiting post (54) is disposed on the outer surface of the second adjusting rod (51), and the limiting post (54) is adapted to the limiting groove.

13. The throttling device according to claim 12, wherein, The number of the limiting posts (54) is set to be multiple, and the multiple limiting posts (54) are circumferentially arranged around the second adjusting rod (51); the number of the limiting grooves is set to be multiple, and the positions, layouts and numbers of the limiting grooves correspond to those of the limiting posts (54); and any one of the limiting posts (54) is adapted to any one of the limiting grooves; And / or, a boss is provided on the second adjusting rod (51), the boss is an annular boss circumferentially arranged around the second adjusting rod (51), the limiting post (54) is disposed on the boss, and the limiting post (54) extends towards the direction close to the bottom of the limiting groove.

14. The throttling device according to claim 7, wherein, The mounting cover (8) is made of a transparent material; or, a transparent area (82) is provided on the mounting cover (8), and the position of the transparent area (82) corresponds to the position of the scale portion (44).

15. An air-conditioning system, comprising a throttling device, wherein, The throttling device is the throttling device according to any one of claims 1-14.

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