CN111515308A - Expanded joint processing device for aluminum pipe of automobile air conditioner - Google Patents
Expanded joint processing device for aluminum pipe of automobile air conditioner Download PDFInfo
- Publication number
- CN111515308A CN111515308A CN202010490372.2A CN202010490372A CN111515308A CN 111515308 A CN111515308 A CN 111515308A CN 202010490372 A CN202010490372 A CN 202010490372A CN 111515308 A CN111515308 A CN 111515308A
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- aluminum pipe
- clamp
- connecting handle
- clamp cylinder
- air conditioner
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Straightening Metal Sheet-Like Bodies (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses an expansion joint processing device for an automobile air conditioner aluminum pipe, which comprises a clamp cylinder, wherein a connecting handle is movably arranged in the clamp cylinder along the axial direction of the clamp cylinder, a section of the connecting handle, which is positioned in the clamp cylinder, is sleeved with a first spring, one end of the first spring is abutted against the clamp cylinder, the other end of the first spring is abutted against the connecting handle, the end surface of an aluminum pipe pressing plate is abutted against the end surface of the clamp cylinder, and the connecting handle and the air conditioner aluminum pipe are respectively positioned at two ends of the clamp cylinder; the air conditioner comprises a clamp cylinder, a connecting handle, a clamp plate, a boss, an expansion joint core rod and an air conditioner aluminum pipe, wherein the clamp plate is sleeved on the connecting handle, the end face of the clamp plate abuts against the end face of the clamp cylinder and is axially fixed, the boss on the connecting handle abuts against the inner end face of the clamp plate to limit the connecting handle to move towards one side of the clamp plate, the expansion joint core rod is movably arranged in the clamp cylinder, one end of the expansion joint core rod is fixedly connected with the connecting handle, and the other end of the expansion joint core rod extends into the air conditioner; the aluminum pipe clamp is characterized by further comprising a limiting block fixedly connected to the end face of the clamp cylinder, and the aluminum pipe pressing plate can be clamped on the limiting block.
Description
Technical Field
The invention relates to the technical field of automobile air conditioners, in particular to an expansion joint processing device for an aluminum pipe of an automobile air conditioner.
Background
The automobile air conditioner fluid conveying pipe is an indispensable part in an automobile air conditioner system, is usually an aluminum pipe, is fixedly connected through an aluminum pipe pressing plate, can be affected by automobile vibration in the advancing process of an automobile to generate shaking, and is easy to collide with adjacent parts, so that the looseness and damage of noise and pipelines are caused, and therefore higher requirements are provided for the comprehensive mechanical performance of the pressing plate connection of the air conditioner aluminum pipe.
At present, the connection of a pressure plate and an aluminum pipe in the automobile industry is usually fixed by oxygen brazing, 4047 aluminum-silicon welding wires are used, the welding temperature is 580-. And after the pipeline is welded, airtightness inspection is required, so that the production process is multiple, the cost is high, and the operation is inconvenient. In addition, a small amount of welding slag or other metal chips may remain on the welding seam, and the welding seam needs to be cleaned by vibration cleaning, which is not favorable for batch production.
Disclosure of Invention
Aiming at the technical problems existing at present, the invention provides an expansion joint processing device for an aluminum pipe of an automobile air conditioner, which aims to solve the problems in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
an expansion joint processing device for an automobile air conditioner aluminum pipe comprises an air conditioner aluminum pipe, an aluminum pipe pressing plate and a clamp cylinder, wherein the aluminum pipe pressing plate is sleeved on the air conditioner aluminum pipe;
a clamp disc is sleeved on the connecting handle, the end face of the clamp disc abuts against the end face of the clamp cylinder and is axially fixed, and a boss on the connecting handle abuts against the inner end face of the clamp disc to limit the connecting handle to move to one side of the clamp disc;
the expansion joint device is characterized by further comprising an expansion joint core rod movably arranged in the clamp cylinder, wherein one end of the expansion joint core rod is fixedly connected with the connecting handle, and the other end of the expansion joint core rod extends into the air-conditioning aluminum pipe.
According to the technical scheme, the outer end of the connecting handle is connected with a machine tool during use, the connecting handle and the expansion connecting core rod are pushed to move forwards, expansion connection and fixation of the air-conditioning aluminum pipe and the aluminum pipe pressing plate are completed, after the expansion connection and fixation, the connecting handle and the expansion connecting core rod return to the original position under the action of the first spring, and the universality is high.
Preferably, first grooves are uniformly distributed on the inner hole of the clamp disc along the circumferential direction of the inner hole, first lugs extending into the first grooves are distributed on the periphery of the corresponding position on the connecting handle, and when the connecting handle moves back and forth, the first lugs can move back and forth along the first grooves.
So set up, effectively guaranteed the motion precision of connecting handle and expanded joint plug, avoided the connecting handle to appear rotating relatively at the removal in-process, and then improved the expanded joint precision.
Preferably, the front end of the connecting handle is an extending section, the first spring is sleeved on the extending section, and the boss is located between the extending section and the first protruding block.
Preferably, a stepped hole is formed in the clamp cylinder along the axial direction of the clamp cylinder, the extending section of the connecting handle is located in the stepped hole, one end of the first spring abuts against the stepped hole, and the other end of the first spring abuts against the boss.
So set up, install the section of stretching into of first spring and connecting handle in the shoulder hole, can guarantee the stability in the lathe axial thrust working process like this, effectively prevented the impact to the air conditioner aluminum pipe, improved the life of expanded joint device.
Preferably, the aluminum pipe clamp further comprises a limiting block fixedly connected to the end face of the clamp cylinder, and the aluminum pipe pressing plate is clamped on the limiting block.
Preferably, the end face of the limiting block is distributed with second grooves, and the end face of the clamp cylinder is provided with second convex blocks extending into the second grooves.
So set up, avoided appearing relative rotation between anchor clamps jar and the stopper in the use, further improved the expanded joint precision of air conditioner aluminum pipe.
Preferably, the limiting block comprises a limiting body which is integrally of a U-shaped structure, the aluminum pipe pressing plate is clamped in the limiting body, two limiting jacking mechanisms are movably arranged on two side walls of the limiting body respectively and symmetrically arranged, and the movable end of each limiting jacking mechanism is in contact with the aluminum pipe pressing plate.
Preferably, the limiting and jacking mechanism comprises a screw, a second spring and a jacking pin, wherein one end of the second spring is abutted against the screw, and the other end of the second spring is abutted against the jacking pin;
the side wall of the limiting body is provided with a screw hole and a pin hole, the screw hole is communicated with the pin hole, the axis of the screw hole and the axis of the pin hole are located on the same straight line, the screw is installed in the screw hole, the puller pin is installed in the pin hole, and the movable end of the puller pin extends out of the pin hole and then contacts with the aluminum pipe pressing plate.
According to the arrangement, the jacking pin is always in contact with the aluminum pipe pressing plate in the expansion joint process, the screw is fixed, the jacking pin is pre-tightened and adjusted through the elastic force of the second spring, the concentricity of the expansion joint core rod and the aluminum pipe pressing plate hole is ensured, and the expansion joint precision is improved.
Compared with the prior art, the invention has the beneficial effects that: the invention has simple structure and low manufacturing cost, and greatly optimizes the assembly of the air-conditioning aluminum pipe and the aluminum pipe pressing plate. Is beneficial to batch production and greatly reduces the production cost. Simultaneously, the assembly of air conditioner aluminum pipe and aluminum pipe clamp plate is also simple swift, no longer need the manual adjustment assembly angle, and convenient operation has shortened the assemble duration greatly, has improved machining efficiency.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the exploded structure of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;
fig. 5 is a cross-sectional view taken along line C-C of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The expansion joint processing device for the automobile air conditioner aluminum pipe as shown in the attached drawings 1-5 comprises a clamp cylinder 4, wherein the clamp cylinder 4 is of a cylindrical structure, a stepped hole 41 is formed in the clamp cylinder 4 along the axial direction of the clamp cylinder, a connecting handle 7 is movably mounted in the stepped hole 41 along the axial direction of the stepped hole, one end of the connecting handle 7 extends into the stepped hole 41, the other end of the connecting handle extends out of the clamp cylinder 4, and the part extending out of the clamp cylinder 4 is connected with a machine tool shaft during use.
The part of the connecting handle 7 located in the clamp cylinder 4 is an extending section 71, the extending section 71 is sleeved with a first spring 42, one end of the first spring 42 abuts against the stepped hole 41 of the clamp cylinder 4, the other end of the first spring abuts against a boss 72 of the connecting handle 7, the end face of the boss 72 abuts against the end face of the clamp disc 5, the clamp disc 5 and the clamp cylinder 4 are connected in the axial direction through a first bolt 52, and the outer diameter of the clamp disc 5 is the same as the outer diameter of the clamp cylinder 4.
The clamp disc 5 is sleeved on the connecting handle 7, and because the clamp disc 5 is fixedly connected to the clamp cylinder 4 and the boss 72 on the connecting handle 7 is abutted against the end face of the clamp disc 5, the limiting position of the leftward movement of the connecting handle 7 is limited (refer to fig. 3); four first grooves 51 are uniformly distributed on an inner hole of the clamp disc 5 along the circumferential direction of the inner hole, the first grooves 51 penetrate through the thickness direction of the clamp disc 5, first convex blocks 74 extending into the first grooves 51 are distributed on the periphery of the corresponding position on the connecting handle 7, the length of each first convex block 74 is greater than that of each first groove 51, when the connecting handle 7 moves back and forth under the action of external force, each first convex block 74 can move back and forth along the corresponding first groove 51, and meanwhile, relative rotation between the connecting handle 7 and the clamp disc 5 is limited. The boss 72 is located at a position between the protruding section 71 and the first projection 74, and the outer diameter of the boss 72 is larger than the outer diameters of the protruding section 71 and the first projection 74.
The other end terminal surface of anchor clamps jar 4 is gone up and is had stopper 3 through second bolt 32 rigid coupling, and this stopper 3 is including the whole spacing body 30 that is U type structure, and aluminum pipe clamp plate 2 card is on this spacing body 30, and the terminal surface of aluminum pipe clamp plate 2 offsets with the terminal surface of anchor clamps jar 4, and air conditioner aluminum pipe 1 is worn to establish on aluminum pipe clamp plate 2 through the hole on the aluminum pipe clamp plate 2, and in the anchor clamps jar 4 was stretched into to the one end of air conditioner aluminum pipe 1, the other end was the free end. The connecting handle 7 and the air-conditioning aluminum pipe 1 are respectively positioned at two ends of the clamp cylinder 4.
The second groove 31 is distributed on the end face of the limiting body 30 facing to one end of the clamp cylinder 4, the second convex block 43 extending into the second groove 31 is arranged on the end face of the clamp cylinder 4, and relative rotation between the limiting body 30 and the clamp cylinder 4 in the use process is avoided through the matching of the second convex block 43 and the second groove 31.
In order to improve the expansion joint precision, two limit jacking mechanisms are movably arranged on two side walls of the limit body 30 respectively, the two limit jacking mechanisms are symmetrically arranged, each limit jacking mechanism comprises a screw 8, a second spring 9 and a jacking pin 10, one end of each second spring 9 is abutted against the screw 8, and the other end of each second spring is abutted against the jacking pin 10; the side wall of the limiting body 30 is provided with a threaded hole 33 and a pin hole 34, the pin hole 34 is subjected to quenching and hardening treatment, the threaded hole 33 is close to the outer side of the side wall of the limiting body 30, the pin hole 34 is close to the inner side, the threaded hole 33 is communicated with the pin hole 34, the axis of the threaded hole 33 and the axis of the pin hole 34 are positioned on the same straight line, the screw 8 is installed in the threaded hole 33, the puller pin 10 is installed in the pin hole 34, and the movable end of the puller pin 10 always extends out of the pin hole 34 to be contacted with the aluminum pipe pressing plate 2.
One end of the connecting handle 7 extending into the clamp cylinder 4 is provided with a mounting hole 75, one end of the expansion joint core rod 6 is mounted in the mounting hole 75, and the other end of the expansion joint core rod extends into the air-conditioning aluminum pipe 1. Meanwhile, a first screw hole 76 is formed in the middle of the connecting shank 7, the center line of the first screw hole 76 and the center line of the mounting hole 75 are located on the same straight line, a second screw hole 61 is formed in one end, close to the connecting shank 7, of the expansion joint core rod 6, and a third bolt is mounted in the second screw hole 61 and the first screw hole 76 so as to connect the expansion joint core rod 6 and the connecting shank 7.
The principle and the using process of the invention are as follows:
the outer end of the connecting handle 7 is connected with a machine tool shaft, the air-conditioning aluminum pipe 1 is arranged in a hole in the aluminum pipe pressing plate 2 in a penetrating mode, the aluminum pipe pressing plate 2 is clamped on the limiting block 3, the machine tool shaft is added to drive the connecting handle 7 and the expansion connecting core rod 6 to move forwards, expansion connection of the air-conditioning aluminum pipe 1 and the aluminum pipe pressing plate 2 is achieved, the jacking pins 10 on the two side walls of the limiting block 3 are pre-adjusted under the action of the second spring 9 and the screw 8 in the expansion connection process, and concentricity of the expansion connecting core rod 6 and the hole in the aluminum pipe pressing plate 2 is guaranteed all. The air-conditioning aluminum pipe 1 and the aluminum pipe pressing plate 2 are fixed by adopting a cold-working expansion joint process, the rotating torque of the fixed two is more than 30N.m, the pulling-out force is more than 50Kg, the dimensional precision and the roundness are less than 0.05mm, and the smoothness reaches
The precision is higher than that of the common welding process.
Meanwhile, the invention has universality, when the size of the aluminum pipe pressing plate 2 changes, only the size of the inner ring of the limiting block 3 and the size of the expansion connecting core rod 6 need to be changed, other parts can be produced without changing, and the effect of generalization is achieved.
The foregoing describes preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (6)
1. The utility model provides an expanded joint processingequipment of vehicle air conditioner aluminum pipe, includes air conditioner aluminum pipe (1) and overlaps and establish aluminum pipe clamp plate (2) on this air conditioner aluminum pipe (1), its characterized in that: the aluminum pipe air-conditioning aluminum pipe clamp is characterized by further comprising a clamp cylinder (4), a connecting handle (7) is movably mounted in the clamp cylinder (4) along the axial direction of the clamp cylinder, one end of the connecting handle (7) extends into the clamp cylinder (4), the other end of the connecting handle extends out of the clamp cylinder (4), a first spring (42) is sleeved on one section of the connecting handle located in the clamp cylinder (4), one end of the first spring (42) abuts against the clamp cylinder (4), the other end of the first spring abuts against the connecting handle (7), one end of the air-conditioning aluminum pipe (1) can extend into the clamp cylinder (4), the other end of the air-conditioning aluminum pipe (1) extends out of the clamp cylinder (4), the end face of the aluminum pipe pressing plate (2) abuts against the end face of the clamp cylinder (4), and the connecting handle (7) and the air-conditioning aluminum pipe (1) are located at two;
a clamp plate (5) is sleeved on the connecting handle (7), the end face of the clamp plate (5) is abutted against the end face of the clamp cylinder (4) and is axially fixed, and a boss (72) on the connecting handle (7) is abutted against the inner end face of the clamp plate (5) to limit the connecting handle (7) to move to one side of the clamp plate (5);
the air-conditioning aluminum pipe clamp further comprises an expansion joint core rod (6) movably arranged in the clamp cylinder (4), one end of the expansion joint core rod (6) is fixedly connected with the connecting handle (7), and the other end of the expansion joint core rod extends into the air-conditioning aluminum pipe (1);
first grooves (51) are uniformly distributed on the inner hole of the clamp disc (5) along the circumferential direction of the inner hole, first convex blocks (74) extending into the first grooves (51) are distributed on the periphery of the corresponding position on the connecting handle (7), and when the connecting handle (7) moves back and forth, the first convex blocks (74) can move back and forth along the first grooves (51);
the aluminum pipe clamp is characterized by further comprising a limiting block (3) fixedly connected to the end face of the clamp cylinder (4), and the aluminum pipe pressing plate (2) can be clamped on the limiting block (3).
2. The expansion joint processing device of the aluminum pipe for the automobile air conditioner as recited in claim 1, wherein: the front end part of the connecting handle (7) is an extending section (71), the first spring (42) is sleeved on the extending section (71), and the boss (72) is located between the extending section (71) and the first convex block (74).
3. The expansion joint processing device of the aluminum pipe for the automobile air conditioner as claimed in claim 2, wherein: a stepped hole (41) is formed in the clamp cylinder (4) along the axial direction of the clamp cylinder, the extending section (71) of the connecting handle (7) is located in the stepped hole (41), one end of the first spring (42) abuts against the stepped hole (41), and the other end of the first spring abuts against the boss (72).
4. An expansion joint processing device for aluminum pipes for automobile air conditioners according to any one of claims 1 to 3, wherein: second grooves (31) are distributed on the end face of the limiting block (3), and second convex blocks (43) extending into the second grooves (31) are arranged on the end face of the clamp cylinder (4).
5. The expansion joint processing device for the aluminum pipe of the automobile air conditioner as claimed in claim 4, wherein: the limiting block (3) comprises a limiting body (30) which is integrally of a U-shaped structure, the aluminum pipe pressing plate (2) can be clamped in the limiting body (30), two limiting jacking mechanisms are movably arranged on two side walls of the limiting body (30) respectively and symmetrically arranged, and the movable end of each limiting jacking mechanism is in contact with the aluminum pipe pressing plate (2).
6. The expansion joint processing device for the aluminum pipe of the automobile air conditioner as recited in claim 5, wherein: the limiting jacking mechanism comprises a screw (8), a second spring (9) and a jacking pin (10), one end of the second spring (9) is abutted against the screw (8), and the other end of the second spring is abutted against the jacking pin (10);
the aluminum pipe pressing plate is characterized in that a screw hole (33) and a pin hole (34) are formed in the side wall of the limiting body (30), the screw hole (33) is communicated with the pin hole (34), the axis of the screw hole (33) and the axis of the pin hole (34) are located on the same straight line, the screw (8) is installed in the screw hole (33), the puller pin (10) is installed in the pin hole (34), and the movable end of the puller pin (10) extends out of the pin hole (34) and then is contacted with the aluminum pipe pressing plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010490372.2A CN111515308B (en) | 2020-06-02 | 2020-06-02 | Expanded joint processing device for aluminum pipe of automobile air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010490372.2A CN111515308B (en) | 2020-06-02 | 2020-06-02 | Expanded joint processing device for aluminum pipe of automobile air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111515308A true CN111515308A (en) | 2020-08-11 |
| CN111515308B CN111515308B (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010490372.2A Active CN111515308B (en) | 2020-06-02 | 2020-06-02 | Expanded joint processing device for aluminum pipe of automobile air conditioner |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3829948A (en) * | 1973-03-22 | 1974-08-20 | Carrier Corp | Apparatus for expanding heat exchanger tubes in tube support sheets |
| US4934038A (en) * | 1989-09-15 | 1990-06-19 | Caterpillar Inc. | Method and apparatus for tube expansion |
| CN201206687Y (en) * | 2008-05-15 | 2009-03-11 | 张良灿 | Fast joint for air-conditioning duct |
| CN102441616A (en) * | 2011-11-30 | 2012-05-09 | 华南理工大学 | Shell-and-tube heat exchanger and method for carrying out expansion joint on aluminum heat exchange tube and steel tube plate thereof |
| CN203737865U (en) * | 2013-12-11 | 2014-07-30 | 上海电力建设修造厂 | Hydraulic tube expanding device |
| CN203843029U (en) * | 2014-04-28 | 2014-09-24 | 上海通华不锈钢压力容器工程有限公司 | Hydraulic power pipe expander |
| US9694410B1 (en) * | 2016-12-12 | 2017-07-04 | Yung Chi Industry Co., Ltd. | Pipe expanding device |
| CN108971935A (en) * | 2018-02-28 | 2018-12-11 | 中信戴卡股份有限公司 | A kind of device for fixing metal tube and plate expanded joint |
| CN212384424U (en) * | 2020-06-02 | 2021-01-22 | 四川航勰汽车空调有限公司 | Expansion joint processing device for aluminum pipe of automobile air conditioner |
-
2020
- 2020-06-02 CN CN202010490372.2A patent/CN111515308B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3829948A (en) * | 1973-03-22 | 1974-08-20 | Carrier Corp | Apparatus for expanding heat exchanger tubes in tube support sheets |
| US4934038A (en) * | 1989-09-15 | 1990-06-19 | Caterpillar Inc. | Method and apparatus for tube expansion |
| CN201206687Y (en) * | 2008-05-15 | 2009-03-11 | 张良灿 | Fast joint for air-conditioning duct |
| CN102441616A (en) * | 2011-11-30 | 2012-05-09 | 华南理工大学 | Shell-and-tube heat exchanger and method for carrying out expansion joint on aluminum heat exchange tube and steel tube plate thereof |
| CN203737865U (en) * | 2013-12-11 | 2014-07-30 | 上海电力建设修造厂 | Hydraulic tube expanding device |
| CN203843029U (en) * | 2014-04-28 | 2014-09-24 | 上海通华不锈钢压力容器工程有限公司 | Hydraulic power pipe expander |
| US9694410B1 (en) * | 2016-12-12 | 2017-07-04 | Yung Chi Industry Co., Ltd. | Pipe expanding device |
| CN108971935A (en) * | 2018-02-28 | 2018-12-11 | 中信戴卡股份有限公司 | A kind of device for fixing metal tube and plate expanded joint |
| CN212384424U (en) * | 2020-06-02 | 2021-01-22 | 四川航勰汽车空调有限公司 | Expansion joint processing device for aluminum pipe of automobile air conditioner |
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|---|---|
| CN111515308B (en) | 2022-03-15 |
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