Inflating fixture for refrigerator with double adjustment and method for inflating refrigerator

Abstract

The present invention provides an inflation clamp for refrigerators with double adjustment and a refrigerator inflation method, wherein a first adjustment mechanism and a second adjustment mechanism are respectively arranged at the middle and top of the inflation valve stem; the first adjustment mechanism at the middle of the inflation valve stem is an auxiliary adjustment mechanism, which can make fine adjustments to the axial movement of the inflation valve stem, and the extension length of the hexagonal wrench at the lower end of the inflation valve stem can be slowly adjusted through the first adjustment mechanism to adapt to the depth requirements of the inflation interface of different refrigerators; the second adjustment mechanism at the top of the inflation valve stem is a main adjustment mechanism, which can quickly make large adjustments to the axial movement of the inflation valve stem, thereby improving assembly efficiency. The present invention has little change to the existing inflation clamp structure, and only additional threads are arranged in the middle of the inflation valve stem and a second adjustment mechanism is added, thereby reducing the modification cost; after the second adjustment mechanism is removed separately, it can be used as a traditional inflation clamp.

Description

Technical Field

[0001] The invention relates to a refrigerator, and in particular to an inflation clamp with double adjustment for a refrigerator and an inflation method for the refrigerator. Background Art

[0002] The free piston Stirling refrigerator, hereinafter referred to as the "refrigerator", is an important cold source of the Stirling low-temperature refrigerator, and mainly provides the cold required for the low-temperature refrigerator during the working process. In order to maintain the normal operation of the refrigerator, a certain amount of high-pressure gas needs to be filled into the strictly sealed refrigerator before the refrigerator works. If a high-pressure gas cylinder is used for filling, its repeatability cannot be guaranteed, and it is not conducive to maintaining the good sealing of the refrigerator itself. Therefore, an inflation fixture coupled with the refrigerator's inflation port can be used to make the inflation operation quick and easy, with good repeatability, and at the same time maintain the good sealing of the refrigerator.

[0003] In the prior art of the inflation clamp, due to the fixed processing length of the hexagonal wrench at the bottom, in order to adapt to the different hexagonal screw depth requirements of the refrigerator inflation port, when using it, it is generally necessary to press the second rotating part to compress the internal column spring of the clamp to adjust its extension length. In addition, the inflation valve seat at the lower end and the bottom threaded joint are often manufactured by integrated processing.

[0004] In the prior art of the inflation clamp, due to the fixed processing length of the hexagonal wrench at the bottom, in order to adapt to the different hexagonal screw depth requirements of the refrigerator inflation port, when using it, it is generally necessary to press the second rotating part to compress the internal column spring of the clamp to adjust its extension length, which is inconvenient to operate. After repeated use, the spring is prone to deformation, resulting in the scrapping of the clamp. In addition, the lower end inflation valve seat and the bottom threaded joint are often manufactured in an integrated manner, and the thread size is fixed, which cannot be used to match the refrigerator inflation interface with different thread sizes. In addition, since the bottom wall thickness of the threaded joint is relatively thin, it is a thin-walled part. Therefore, when it is repeatedly used, it may be broken due to the combined effect of other factors such as the extrusion of the compression spring and the biting of the thread of the threaded joint, thereby causing the entire set of clamps to be scrapped. Summary of the invention

[0005] To solve the above problems, the present invention provides an inflation clamp for a refrigerator with double adjustment and a refrigerator inflation method. The inflation clamp is equipped with two adjustment mechanisms, and the first adjustment mechanism can slowly adjust the extended length of the hex wrench at the lower end of the inflation valve stem to adapt to the depth requirements of the different refrigerator inflation interfaces. The operation is easy and can effectively avoid the risk of the hex wrench not being properly engaged with the refrigerator inflation port, thereby better ensuring the safety of the inflation clamp during the inflation process.

[0006] In order to realize the above scheme, the technical scheme adopted by the present invention is as follows:

[0007] A gas charging fixture for a refrigerator with double adjustment, the gas charging fixture for a refrigerator comprising a gas charging valve seat and a gas charging valve stem, the side wall of the gas charging valve seat is provided with a through hole, the gas charging valve stem passes through the gas charging valve seat and extends out from the bottom opening of the gas charging valve seat,

[0008] A first adjustment mechanism and a second adjustment mechanism are respectively arranged at the middle and top of the inflation valve stem;

[0009] The first adjustment mechanism includes a first rotating member, a sleeve, a washer and a bearing, the sleeve is installed in the middle of the inflation valve stem by threaded sleeve, the first rotating member is fixedly sleeved on the outer diameter of the sleeve, the upper end surface of the inflation valve seat is coaxially provided with an annular groove, the bearing is installed in the annular groove and can be rotatably sleeved on the outer diameter of the sleeve, the bottom of the sleeve is provided with a support ring to support the bearing, the washer is sleeved on the outer wall of the sleeve and is located between the first rotating member and the bearing, the upper end surface of the washer is used to support and limit the first rotating member, and the lower end surface of the washer is pressed against the bearing;

[0010] The second adjusting mechanism is fixedly mounted on the top end of the inflation valve stem. The second adjusting mechanism drives the inflation valve stem to rotate and causes the inflation valve stem to move axially under the action of the sleeve to adjust the extension length of the inflation valve stem in the inflation valve seat.

[0011] Furthermore, the second adjusting mechanism includes a second rotating member, and the second rotating member is fixedly mounted on the top end of the inflation valve stem by a pin.

[0012] Furthermore, the first rotating member and the second rotating member are hand wheels.

[0013] Furthermore, the first rotating member is fixedly connected to the sleeve via a locking screw, a positioning tapered hole is provided on the outer diameter of the sleeve, and the end of the locking screw abuts against the positioning tapered hole.

[0014] Furthermore, a replaceable valve seat pressing plate is installed on the upper end surface of the inflation valve seat, and the valve seat pressing plate is arranged with a plurality of through holes and is fixedly connected to the inflation valve seat by screws.

[0015] The valve seat pressure plate is coaxially arranged on the periphery of the gasket, and the lower end surface of the valve seat pressure plate presses the bearing tightly.

[0016] Furthermore, a threaded joint in the shape of three steps is installed on the lower end surface of the inflation valve seat, and the outer diameters of the first, second and third steps decrease gradually from top to bottom;

[0017] The first step is used to cooperate with the protruding boss at the bottom of the inflation valve seat and ensure sealing through the first sealing ring.

[0018] The inner bottom surface of the second step is used to axially limit the inflation valve seat and maintain the appropriate sealing deformation of the first sealing ring.

[0019] The inner bottom surface of the third step is used to limit the extension length of the hex wrench at the bottom of the inflation valve stem. The outer lower surface of the third step is processed with an annular sealing groove, and the annular sealing groove is used to install a sealing ring. The outer wall of the third step is provided with a thread for connecting to the inflation port of the refrigerator, and the thread is nickel-plated or silver-plated.

[0020] Furthermore, the bearing is a deep groove ball bearing.

[0021] Furthermore, a limiting convex ring located below the sleeve is provided on the outer diameter of the middle part of the inflation valve stem, and the limiting convex ring limits the upper limit position of the inflation valve stem;

[0022] The lower part of the inflation valve stem is in sliding sealing cooperation with the inflation valve seat.

[0023] A refrigerator inflation method based on the refrigerator inflation fixture comprises the following steps:

[0024] S1. Rotate the first rotating member to drive the sleeve to rotate, and the sleeve drives the inflation valve stem to rotate and move axially, so that the non-circular wrench at the bottom of the inflation valve stem is retracted into the inflation fixture;

[0025] S2, the bottom of the inflation valve seat is fixedly connected to the refrigerator seal;

[0026] S3, rotating the first rotating member so that the wrench extends out from the inflation fixture, and the wrench is pressed against the metal spring in the inflation screw groove of the refrigerator inflation port, and the second adjusting mechanism is rotated to determine whether the wrench is fitted into the inflation screw groove. If not, the first rotating member is rotated to correct the angle of the inflation valve stem until the wrench is fitted into the inflation screw groove;

[0027] S4, connect the air inlet pipe to the through hole on the side wall of the inflation valve seat, and the other end of the air inlet pipe is connected to the gas cylinder quick connector, the air inlet pipe is provided with a pipeline valve, the gas cylinder, the air inlet pipe, and the internal cavity of the inflation fixture form an inflation and exhaust channel, unscrew the inflation screw, and the gas in the gas cylinder enters the inflation fixture through the air inlet pipe for inflation;

[0028] S5. After the inflation is completed, the second adjusting mechanism is rotated in the reverse direction to press the wrench against the metal spring to close the inflation and exhaust passage, and the first rotating member is rotated until the inflation valve stem returns to the upper dead center, the pipeline valve is closed, and the refrigerator is separated from the inflation fixture.

[0029] The present invention has the following beneficial effects:

[0030] 1) Two adjustment mechanisms are configured. The first adjustment mechanism in the middle of the inflation valve stem is an auxiliary adjustment mechanism, which can make fine adjustments to the axial movement of the inflation valve stem. The extension length of the hexagonal wrench at the lower end of the inflation valve stem is slowly adjusted through the first rotating member to adapt to the depth requirements of the inflation interface of different refrigerators; the second adjustment mechanism at the top of the inflation valve stem is the main adjustment mechanism, which can quickly and significantly adjust the axial movement of the inflation valve stem to improve assembly efficiency.

[0031] 2) The existing inflatable clamp structure is slightly changed, and only an additional thread is provided in the middle of the inflatable valve stem and a second adjustment mechanism is added, thereby reducing the modification cost; after the second adjustment mechanism is removed separately, it can be used as a traditional inflatable clamp.

[0032] 3) The first adjustment mechanism and the second adjustment mechanism are easy to operate, and they do not affect each other during adjustment, so that the inflatable clamp for refrigerators provided by the present invention has the advantages of fast assembly and fine adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative labor.

[0034] Figure 1 A cross-sectional view of an inflatable clamp for a refrigerator with double adjustment provided by the present invention in one embodiment;

[0035] Figure 2 It is a cross-sectional view of an inflation valve seat and a threaded joint installed on the lower end surface of the inflation valve seat;

[0036] Figure 3 A three-dimensional diagram of a valve seat pressure plate installed on the upper end surface of an inflation valve seat;

[0037] Figure 4 is a stereogram of the casing;

[0038] Figure 5 The figure is a connection diagram of the present invention when charging the refrigerator. DETAILED DESCRIPTION

[0039] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0040] In order to fully understand the present invention, detailed steps and detailed structures will be proposed in the following description to illustrate the technical solution of the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0041] Reference Figure 1 As shown, the present invention provides an inflation clamp for a refrigerator with double adjustment, the inflation clamp for a refrigerator includes an inflation valve seat 11 and an inflation valve stem 3, the side wall of the inflation valve seat 11 is provided with a through hole, the bottom end of the inflation valve stem 3 passes through the inflation valve seat 11 and extends out from the bottom opening of the inflation valve seat 11, and a first adjustment mechanism 100 and a second adjustment mechanism 200 are respectively arranged at the middle and top of the inflation valve stem 3.

[0042] The first adjustment mechanism 100 includes a first rotating member 5, a sleeve 6, a washer 7 and a bearing 9. The sleeve 6 is installed in the middle of the inflation valve stem 3 by threaded sleeve. The first rotating member 5 is fixedly sleeved on the outer diameter of the sleeve 6. The upper end surface of the inflation valve seat 11 is coaxially provided with an annular groove 11-1. The bearing 9 is installed in the annular groove 11-1 and can be rotatably sleeved on the outer diameter of the sleeve 6. The bottom of the sleeve 6 is provided with a support ring 6-2 to support the bearing 9. The washer 7 is sleeved on the outer wall of the sleeve 6 and is located between the first rotating member 5 and the bearing 9. The upper end surface of the washer 7 is used to support and limit the first rotating member 5, and the lower end surface of the washer 7 is pressed against the bearing 9. The second adjustment mechanism 200 is fixedly installed on the top of the inflation valve stem 3. The second adjustment mechanism 200 drives the inflation valve stem 3 to rotate and causes the inflation valve stem 3 to move axially under the action of the sleeve 6 to adjust the extension length of the inflation valve stem 3 in the inflation valve seat 11.

[0043] When the clamp is in use, the extension length of the hexagonal wrench at the lower end of the inflation valve stem 3 can be slowly adjusted through the first rotating member 5 to adapt to operations at different depths.

[0044] In an optional embodiment, the second adjustment mechanism 200 includes a second rotating member 1 , and the second rotating member 1 is fixedly mounted on the top of the inflation valve stem 3 via a pin 2 .

[0045] In an optional embodiment, the first rotating member 5 is a small hand wheel, and the second rotating member 1 is a large hand wheel, which is convenient for manual rotation.

[0046] In an optional embodiment, the first rotating member 5 is fixedly connected to the sleeve 6 by a locking screw 4. The three-dimensional diagram of the sleeve 6 is as shown in FIG. Figure 4 As shown, a positioning tapered hole 6 - 1 is provided on the outer diameter of the sleeve 6 , and the end of the locking screw 4 abuts against the positioning tapered hole 6 - 1 .

[0047] In an optional embodiment, the bearing 9 is a deep groove ball bearing and the sleeve 6 is a copper sleeve.

[0048] In an optional embodiment, if Figure 3 As shown, a valve seat pressure plate 8 is installed on the upper end surface of the inflation valve seat 11. The valve seat pressure plate 8 is arranged with multiple through holes and is fixedly connected to the inflation valve seat 11 by screws 10. The valve seat pressure plate 8 is coaxially arranged on the periphery of the gasket 7, and the lower end surface of the valve seat pressure plate 8 is tightly pressed against the bearing 9.

[0049] In an optional embodiment, the lower end surface of the inflation valve seat 11 is installed with a three-step threaded joint 13 through a screw 13-4, and the outer diameters of the first step 13-1, the second step 13-2, and the third step 13-3 from top to bottom gradually decrease. Figure 2 .

[0050] Among them, the interior of the first step 13-1 is used to cooperate with the protruding boss at the bottom of the inflation valve seat 11 and ensure sealing through the first sealing ring 19; the inner bottom surface of the second step 13-2 is close to the lower end surface of the protruding boss, which is used to axially limit the inflation valve seat 11 and maintain the appropriate sealing deformation of the first sealing ring 19; the inner bottom surface of the third step 13-2 is used to limit the extension length of the hexagonal wrench at the bottom of the inflation valve stem 3, and the outer lower surface of the third step 13-3 is processed with an annular sealing groove. When the clamp is threadedly connected to the inflation port of the refrigerator through the threaded joint 13, the second sealing ring 20 is installed in the annular sealing groove to ensure the airtightness of the refrigerator during the inflation and exhaust process.

[0051] Among them, the thin-walled part at the lower end of the clamp, i.e., the threaded joint, is connected to the inflation valve seat by a flat-head cross screw 13-4, which is convenient for disassembly and replacement. The outer diameter of the third step 13-3 of the threaded joint 13 is provided with threads, and the threads are nickel-plated or silver-plated to prevent the threads from biting and reduce the possibility of breakage. By replacing threaded joints 13 with different thread sizes, it is possible to adapt to refrigerator inflation interfaces with different thread sizes, while avoiding the problem of the entire set of clamps being scrapped due to the breakage of the threaded joint 13, thereby improving its reusability.

[0052] In an optional embodiment, a limiting convex ring 3-1 is provided on the outer diameter of the middle part of the inflation valve stem 3 and is located below the sleeve 6. The limiting convex ring 3-1 limits the upper limit position of the inflation valve stem 3. The lower part of the inflation valve stem 3 is slidably sealed with the inflation valve seat 11, and one or more sealing rings are provided at the position of the inflation valve stem 3 where the inflation valve stem 3 is slidably sealed.

[0053] The principle of the first adjustment mechanism 100 for adjusting the extension length of the hexagonal wrench at the bottom end of the inflation valve stem is as follows:

[0054] The first rotating member 5 is positioned on the sleeve 6, and the inner hole of the sleeve 6 is a threaded through hole. The first rotating member 5 is pressed on the gasket 7. The gasket 7 is pressed on the bearing 9 and does not hinder the rotation of the bearing, and is tightly fitted with the outer wall of the sleeve 6. The gasket 7 does not contact the inflation valve seat 11 and the valve seat pressure plate 8. The lower part of the bearing 9 is pressed on the upper end face of the extension limit ring at the bottom of the sleeve 6, and is tightly fitted with the outer wall of the sleeve 6. When the first rotating member 5 is positioned, the bearing 9 and the gasket 7 on the sleeve are fixed. Therefore, the first rotating member 5, the sleeve 6, the gasket 7, and the bearing 9 form a complete component. Only the bearing 9 of the entire component can rotate and it cannot move up and down.

[0055] The outer half of the bearing 9 is located on the stepped platform of the inflation valve seat 11. The valve seat pressure plate 8 compacts and fixes the bearing 9 but does not hinder its rotation, that is, the bearing 9 is fixed on the inflation valve seat 11 and cannot move up and down but can only rotate. The first rotating member 5 does not contact the valve seat pressure plate 8. Since the first rotating member 5, sleeve 6, gasket 7, and bearing 9 are already a complete component and the movement of the component can only rely on the rotation of the bearing 9, the complete component can be fixed by fixing the bearing 9, and its movement can only be achieved through the rotation of the bearing 9, and then the first rotating member 5, sleeve 6, gasket 7, bearing 9 and inflation valve seat 11 form a whole.

[0056] When the inflation fixture has been coupled to the inflation interface of the refrigerator, the inflation valve seat 11 is fixed. Since the inflation valve seat 11 and the first rotating member 5, sleeve 6, gasket 7, bearing 9, etc. are already fixed, when the first rotating member 5 can rotate by relying on the rotation of the bearing 9, the first rotating member 5 and the sleeve 6 are positioned and fixed, the sleeve 6 will be driven to rotate. The sleeve 6 is connected to the inflation valve stem 3 by a thread. Since the sleeve 6 cannot move up and down, the rotation of the sleeve 6 will be converted into the up and down movement of the inflation valve stem 3 through the threaded connection, so as to achieve the function of adjusting the extension length of the hex wrench 3-2. The middle extension ring of the inflation valve stem 3 plays a limiting role when the first rotating member 5 rotates.

[0057] The adjustment principle of the second adjustment mechanism 200 is as follows:

[0058] When the inflation clamp has been coupled to the inflation interface of the refrigerator, the inflation valve seat 11 is fixed, and the inflation valve stem 3 is driven to rotate by rotating the second rotating member 1. Due to the threaded connection between the middle part of the inflation valve stem 3 and the sleeve 6, when the second rotating member 1 rotates, the sleeve 6 will also rotate accordingly due to the rotation of the bearing 9, but the up and down positions of the sleeve 6 cannot be changed. At this time, the small hand wheel on the sleeve 6 will also rotate accordingly. At this time, the rotation of the first rotating member 5 is only passive rotation, and does not play a role in adjusting the extension length of the hexagonal wrench. Since the extension length of the hexagonal wrench 3-2 has been adjusted, the hexagonal wrench 3-2 and the hexagonal screw at the inflation interface of the refrigerator are well matched. By rotating the second rotating member 1, the inflation valve stem 3 can be driven to rotate, and then the hexagonal screw at the inflation interface of the refrigerator is turned, thereby inflating and exhausting the refrigerator.

[0059] When the inflation fixture is used, the first rotating member of the first adjusting mechanism 100 is adjusted first, and then the second rotating member is rotated. The extended length of the hexagonal wrench adjusted by the first rotating member cannot jam the hexagonal screw at the inflation interface of the refrigerator.

[0060] The following is a further description of the steps of the refrigerator charging method:

[0061] Step 1: Before starting inflation, first fill the "O"-ring (i.e., the second sealing ring 20) into the lower sealing groove of the threaded joint 13 at the lower end of the inflation fixture 17, retract the bottom hexagonal wrench of the inflation fixture 17 into the inside of the fixture by rotating the first rotating part 5 clockwise, align the external thread of the threaded joint 13 of the inflation fixture 17 with the internal thread of the inflation port of the refrigerator 18, and fix the inflation fixture 17 on the refrigerator 18 by rotating the inflation valve seat 11 clockwise.

[0062] Step 2: After the inflation clamp 17 is fixed, rotate the first rotating part 5 counterclockwise. When the hexagonal wrench 3-2 at the bottom of the inflation clamp 17 extends to a certain length, it will press against the hexagonal inflation screw of the inflation port of the refrigerator 18. At this time, rotate the second rotating part 1 clockwise. If the clockwise and counterclockwise rotation of the second rotating part 1 encounters resistance, it means that the hexagonal wrench 3-2 has entered the hexagonal groove at the top of the hexagonal inflation screw of the inflation port of the refrigerator 18. If the clockwise and counterclockwise rotation of the second rotating part 1 does not feel resistance, it has not entered. At this time, it is necessary to feel the pressure of the hexagonal wrench by rotating the first rotating part 5 counterclockwise at the same time to see whether it has entered the hexagonal groove at the top of the hexagonal inflation screw. If the pressure is suddenly reduced, it has entered. After entering, rotate the first rotating part 5 counterclockwise two to three times to prevent the hexagonal wrench from blocking the inflation screw.

[0063] Step 3: A quick plug 16 is welded to the left end of the air inlet pipe 12, and the quick plug 16 is connected to the high-pressure gas cylinder 14 by quick plugging. The high-pressure gas cylinder 14, the pipeline valve 15, the quick plug interface 16, the air inlet pipe 12, the charging valve seat 11 and the internal cavity of the threaded joint 13 form a charging and exhausting channel. A soft metal ring is pressed against the lower part of the charging screw of the refrigerator charging port, and the sealing of the refrigerator 18 charging port is achieved through the extension and deformation of the soft metal ring and the pressing of the charging screw. The inflation pressure is controlled at 3.0-3.2 MPa by opening the valve of the high-pressure gas cylinder 14 and adjusting the pipeline valve 15. At this time, the second rotating part 1 is rotated counterclockwise for about 4 turns to unscrew the inflation screw counterclockwise. Since the inflation screw is squeezed upward, the inflation valve stem 3 is subjected to an upward force. The number of turns of the small handwheel in step 2 that is finally rotated counterclockwise is to leave room for the inflation screw to rise. At this time, the soft metal ring is not squeezed, and the high-pressure gas cylinder 14, the inflation fixture 17 and the refrigerator 18 form a through gas path. The gas enters the refrigerator 18 through the high-pressure gas cylinder 14, the pipeline valve 15, the quick-plug interface 16, the air inlet pipe 12, the inflation valve seat 11 and the internal cavity of the threaded joint 13, the threaded connection between the inflation screw and the refrigerator 18, and the soft metal ring.

[0064] Step 4: Keep the inflation process for a while. After the inflation is completed, first rotate the second rotating part 1 clockwise until the inflation screw is tightened, squeeze the soft metal ring, and wait for it to stretch and deform. At this time, the inflation gas path of the refrigerator 18 is closed, and the first rotating part 5 is rotated counterclockwise until the inflation valve stem 3 returns to the top dead center. Close the high-pressure gas cylinder 14 and the pipeline valve 15, disconnect the pipeline connection between the high-pressure gas cylinder 14 and the inflation fixture 17 through the quick-connect connector 16, rotate the inflation valve seat 11 of the inflation fixture 17 counterclockwise to drive the reverse rotation of the threaded connector 13, so as to separate the inflation fixture 17 from the refrigerator 18. At this point, the inflation and sealing process of the refrigerator is completed.

[0065] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. An inflation fixture for a refrigerator with double adjustment, the inflation fixture for a refrigerator comprising an inflation valve seat (11) and an inflation valve stem (3), the side wall of the inflation valve seat (11) is provided with a through hole, the bottom end of the inflation valve stem (3) passes through the inflation valve seat (11) and extends out from the bottom opening of the inflation valve seat (11), characterized in that: A first adjustment mechanism (100) and a second adjustment mechanism (200) are respectively arranged at the middle part and the top end of the inflation valve stem (3); The first adjustment mechanism (100) comprises a first rotating member (5), a sleeve (6), a washer (7) and a bearing (9); the sleeve (6) is installed on the middle part of the inflation valve stem (3) by threaded sleeve; the first rotating member (5) is fixedly sleeved on the outer diameter of the sleeve (6); the upper end surface of the inflation valve seat (11) is coaxially provided with an annular groove (11-1); the bearing (9) is installed in the annular groove (11-1) and can be rotatably sleeved on the outer diameter of the sleeve (6); the bottom of the sleeve (6) is provided with a support ring (6-2) to support the bearing (9); the washer (7) is sleeved on the outer wall of the sleeve (6) and is located between the first rotating member (5) and the bearing (9); the upper end surface of the washer (7) is used to support and limit the first rotating member (5) and the lower end surface is pressed against the bearing (9); The second adjustment mechanism (200) is fixedly mounted on the top end of the inflation valve stem (3).

2. The inflatable fixture for refrigerator according to claim 1, characterized in that: The second adjustment mechanism (200) comprises a second rotating member (1), and the second rotating member (1) is fixedly mounted on the top end of the inflation valve stem (3) via a pin (2).

3. The inflatable clamp for refrigerator according to claim 2, characterized in that: The first rotating member (5) and the second rotating member (1) are hand wheels.

4. The inflatable fixture for refrigerator according to claim 1, characterized in that: The first rotating member (5) is fixedly connected to the sleeve (6) via a locking screw (4); a positioning tapered hole (6-1) is provided on the outer diameter of the sleeve (6); and the end of the locking screw (4) abuts against the positioning tapered hole (6-1).

5. The inflatable fixture for refrigerator according to claim 1, characterized in that: A replaceable valve seat pressing plate (8) is mounted on the upper end surface of the inflation valve seat (11); the valve seat pressing plate (8) is provided with a plurality of through holes and is fixedly connected to the inflation valve seat (11) via screws (10). The valve seat pressure plate (8) is coaxially arranged on the periphery of the gasket (7), and the lower end surface of the valve seat pressure plate (8) is tightly pressed against the bearing (9).

6. The inflatable fixture for refrigerator according to claim 1, characterized in that: The lower end surface of the inflation valve seat (11) is provided with a threaded joint (13) in the shape of three steps by means of screws (13-4), the outer diameters of the first step (13-1), the second step (13-2) and the third step (13-3) decreasing gradually from top to bottom, an annular sealing groove is processed on the outer lower surface of the third step (13-3), the second sealing ring (20) is installed in the annular sealing groove, and the outer wall of the third step (13-3) is provided with threads for connecting with the inflation port of the refrigerator, and the threads are nickel-plated or silver-plated; The first step (13-1) is used to cooperate with the protruding boss at the bottom of the inflation valve seat (11) and ensure sealing through the first sealing ring (19). The inner bottom surface of the second step (13-2) is used to axially limit the inflation valve seat (11) and maintain the appropriate sealing deformation of the first sealing ring (19). The inner bottom surface of the third step (13-3) is used to limit the extension length of the hexagonal wrench at the bottom of the inflation valve stem (3).

7. The inflatable fixture for refrigerator according to claim 1, characterized in that: The bearing (9) is a deep groove ball bearing.

8. The inflatable fixture for refrigerator according to claim 1, characterized in that: A limiting convex ring (3-1) located below the sleeve (6) is provided on the outer diameter of the middle portion of the inflation valve stem (3), and the limiting convex ring (3-1) limits the upper limit position of the inflation valve stem (3); The lower part of the inflation valve stem (3) is slidably sealed with the inflation valve seat (11).

9. A refrigerator inflation method based on the refrigerator inflation fixture according to any one of claims 1 to 8, characterized in that: The steps include: S1. Rotate the first rotating member (5) to drive the sleeve (6) to rotate, and the sleeve (6) drives the inflation valve stem (3) to rotate and move axially, so that the non-circular wrench at the bottom of the inflation valve stem (3) is retracted into the inflation fixture; S2, sealingly and securely connecting the bottom of the inflation valve seat (11) to the refrigerator (18); S3, rotating the first rotating member (5) so that the wrench extends out from the inflation clamp, and the wrench is pressed against the metal spring in the inflation screw groove of the inflation port of the refrigerator (18), and determining whether the wrench is properly engaged with the inflation screw groove by rotating the second adjusting mechanism (200); if not, the first rotating member (5) is appropriately rotated to correct the angle of the inflation valve stem (3) until the wrench is properly engaged with the inflation screw groove; S4. Connect the air inlet pipe (12) to the through hole on the side wall of the inflation valve seat (11), connect the other end of the air inlet pipe (12) to the gas cylinder (14), provide a pipeline valve (15) on the air inlet pipe (12), and form an inflation and exhaust passage with the gas cylinder (14), the air inlet pipe (12), and the internal cavity of the inflation fixture. Unscrew the inflation screw, and the gas in the gas cylinder (14) enters the inflation fixture through the air inlet pipe (12) for inflation; S5. After the inflation is completed, the second adjustment mechanism (200) is rotated in the reverse direction so that the wrench is pressed against the metal spring to close the inflation and exhaust passage, and the first rotating member (5) is rotated until the inflation valve stem (3) returns to the upper dead center, the pipeline valve (15) is closed, and the inflation fixture is separated from the refrigerator (18).

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