Refrigerant filling machine based on a refrigerator and a filling method

Abstract

The present application relates to the technical fields of refrigeration machine manufacturing, and discloses a refrigerant filling machine and a filling method based on a refrigeration machine, which comprises a column fixed on the top of a machine table and a disc fixed on the top of the column, and the top of the disc is provided with a filling mechanism arranged in a ring array with the center point of the disc for filling refrigerant into the refrigerant, the filling mechanism comprises a feeding pipe, the inner wall of the feeding pipe is sleeved with a pushing column, the top of the feeding pipe is provided with a pushing mechanism for driving the pushing column to ascend and descend, and the outer wall of the feeding pipe is provided with a limiting mechanism for limiting the ascending position of the pushing column, the limiting mechanism is used to set a space of a specified size for filling refrigerant, and the filled refrigerant is pushed out at one time by the pushing mechanism, so that the filling amount of the refrigerant is controlled, the filling efficiency is improved compared with the traditional filling by weighing, and the residual amount of the refrigerant in the feeding pipe is reduced, so that the filling precision is improved.

Description

Technical Field

[0001] This invention relates to the field of refrigeration machine manufacturing technology, specifically to a refrigerant filling machine and filling method based on a refrigeration machine. Background Technology

[0002] The refrigerant circulation forms the core of the refrigeration cycle. The compressor achieves system pressure balance and maintains continuous cooling of the refrigeration machine. During the manufacturing process, refrigerant needs to be injected into the refrigeration machine to meet the needs of subsequent use.

[0003] CN208365885U discloses a refrigerant filling machine. The background art of the machine raises the problem that existing refrigerant filling machines may leak refrigerant during the filling process due to improper operation or the filling gun not being fully coordinated with the refrigeration equipment. In severe cases, this may even threaten the personal safety of the operator.

[0004] Based on existing technologies, the following problems exist:

[0005] Existing refrigerant filling machines typically inject liquid refrigerant quantitatively by weighing to ensure the injection volume is within the allowable error range. However, this weighing method requires the refrigerant to be held on a weighing device for measurement before injection, reducing filling efficiency. Furthermore, refrigerant residue remains in the pipes connected to the refrigeration unit after filling, further reducing accuracy. To address these issues, a refrigerant filling machine and method based on a refrigeration unit are proposed. Summary of the Invention

[0006] To achieve the above objectives, the present invention provides the following technical solution: a refrigerant filling machine based on a refrigeration unit, comprising a machine base, a column fixedly mounted on the top of the machine base, and a disc fixedly mounted on the top of the column. The top of the disc is provided with a filling mechanism arranged in a circular array around the center point of the disc for filling refrigerant into the refrigerant. The filling mechanism includes:

[0007] A discharge pipe is fixedly sleeved on the top of the disc and extends to the bottom of the disc. A pusher column is sleeved on the inner wall of the discharge pipe. The side wall of the pusher column and the inner side wall of the discharge pipe are dynamically sealed. A pushing mechanism is provided at the top of the discharge pipe to drive the pusher column to rise and fall. A limiting mechanism is provided on the outer wall of the discharge pipe to limit the rising position of the pusher column, thereby adjusting the amount of refrigerant charged into the discharge pipe. The pushing mechanism includes:

[0008] The cylinder body is located at the top of the feed pipe. The inner wall of the cylinder body is fitted with a piston block, and the side wall of the piston block and the inner side wall of the cylinder body are designed to be dynamically sealed.

[0009] The piston rod is fixedly located at the bottom of the piston block and extends to the bottom of the cylinder. The bottom of the piston rod is fixedly connected to the top of the pusher column. The upper end and the lower end of the outer wall of the cylinder are respectively provided with a first air guide assembly and a second air guide assembly to drive the piston block and the pusher column to rise and fall.

[0010] Furthermore, the pushing mechanism also includes;

[0011] The first groove is formed at the bottom of the push column and extends into the piston rod. The top inner wall of the first groove is provided with a second groove. The inner wall diameter of the second groove is larger than that of the first groove. The inner walls of the second groove and the first groove are respectively fitted with a plug and a rod, and the plug and the rod are fixedly connected on the side that is close to each other.

[0012] The connecting pipe is fixedly installed on the outer wall of the cylinder body, and both ends of the connecting pipe are connected to the interior of the cylinder body and the interior of the second groove, respectively.

[0013] Furthermore, the outer wall of the connecting pipe is provided with a first valve body and a pressure relief valve, and the first valve body is located at one end of the connecting pipe near the cylinder body, and the inner side wall of the second groove is provided with a vent hole;

[0014] The sidewalls of the insert block and the insert rod are designed to be dynamically sealed to the inner sidewalls of the second groove and the first groove, respectively. The insert rod is located on the sidewall of one end in the second groove and is fitted with a spring at the bottom of the insert block so that the insert block has an upward tendency to move. The bottom of the insert rod is designed to be arc-shaped.

[0015] The lower end of the feeding tube is arc-shaped, and the bottom of the feeding tube has a socket that matches the insertion rod.

[0016] Furthermore, the first and second air guiding assemblies have the same structure, and are located at the top and bottom of the piston block, respectively, to drive the piston block to descend or rise. The first air guiding assembly includes:

[0017] The first conduit is fixed on the outer wall of the cylinder and located on the top of the piston block. The end of the first conduit away from the cylinder is connected to a retention box. The end of the retention box away from the first conduit is connected to a second conduit. The end of the second conduit away from the retention box is connected to a pump body. The outer wall of the second conduit is provided with a second valve body.

[0018] Furthermore, the limiting mechanism includes:

[0019] The mounting sleeve is fixedly sleeved on the outer wall of the feed tube. The outer wall of the mounting sleeve is rotatably provided with an external threaded tube. The outer wall of the external threaded tube is threadedly connected to an internal threaded tube. The upper end of the outer wall of the internal threaded tube is fixedly provided with a ring array of connectors. The connectors are designed in a bent shape so that the end of the connector away from the internal threaded tube extends into the feed tube. The top of the disc is provided with a drive mechanism for synchronously driving the ring array of external threaded tubes to rotate.

[0020] A limiting ring is fitted onto the inner wall of the feeding tube, and the top of the limiting ring is fixedly connected to the end of the connector located inside the feeding tube.

[0021] Furthermore, the limiting mechanism also includes:

[0022] The pressure sensors are embedded in the bottom of the limiting ring and are arranged symmetrically with respect to the center point of the limiting ring.

[0023] The first sensor is embedded in the bottom of the limiting ring and is arranged symmetrically with respect to the center point of the limiting ring. The first sensor is arranged perpendicularly to the pressure sensor.

[0024] The second sensor is embedded in the top of the push column and is positioned corresponding to that of the first sensor.

[0025] Furthermore, the drive mechanism includes:

[0026] A gear is rotatably mounted on the top of the disc body. A servo motor is fixedly installed inside the column. The output shaft of the servo motor is fixedly connected to a rotating shaft extending to the top of the disc body via a coupling. The rotating shaft is fixedly connected to the disc body.

[0027] The gear ring is fixedly sleeved on the lower end of the outer wall of the externally threaded pipe and meshes with the gear.

[0028] Furthermore, a mounting post is fixedly provided on the top of the disc body, and a mounting plate for mounting the pump body and the stagnation box is fixedly provided on the upper end of the side wall of the mounting post. The side wall of the mounting post is fixedly connected to the outer wall of the cylinder body.

[0029] The outer wall of the internally threaded tube is slidably connected to the lower end of the side wall of the mounting column to limit the internally threaded tube.

[0030] The present invention also provides a refrigerant charging method based on a refrigeration machine, wherein the refrigerant charging machine based on a refrigeration machine is used, and the method includes the following steps:

[0031] S1: Adjust the amount of refrigerant stored in the feed pipe according to the amount of refrigerant charged into the refrigeration unit, so as to fill the feed pipe with a specified amount of refrigerant;

[0032] S2: Refrigerant is conveyed in the feed pipe so that all the refrigerant in the feed pipe is pushed into the cooler by the pusher mechanism to complete the refrigerant filling.

[0033] Furthermore, in step S1, the amount of refrigerant stored in the feed pipe is adjusted by the limiting mechanism to control the position of the pusher column as it rises.

[0034] This invention provides a refrigerant filling machine and method based on a refrigeration unit. Compared with the prior art, it has the following advantages:

[0035] 1. This invention uses a limiting mechanism to set a space of a specified size for filling refrigerant, and uses a pushing mechanism to push out all the filled refrigerant at once, thereby facilitating control of the refrigerant filling amount. Compared with the traditional method of filling by weighing, it improves filling efficiency and reduces the amount of refrigerant residue in the discharge pipe, thereby improving filling accuracy.

[0036] 2. This invention uses a gas-driven method to raise and lower the pusher column, which facilitates the limiting mechanism to limit the pusher column. At the same time, it enables purely mechanical limiting of the pusher column, thereby improving the accuracy of controlling the filling amount. It can also drive the insertion rod and the insertion block to move, so as to push out the refrigerant remaining in the insertion hole in the discharge tube. Compared with the traditional filling mechanism, it reduces the amount of refrigerant remaining in the tube after each filling, improves the filling accuracy, and facilitates long-term use.

[0037] 3. The present invention uses a limiting mechanism to limit the lifting position of the pusher column, thereby facilitating the adjustment of the refrigerant filling space in the feed pipe. This allows for adjustment of the refrigerant injection amount according to actual conditions. In conjunction with the pusher mechanism, it facilitates adjustment without affecting the movement of the pusher column. Furthermore, in conjunction with the drive mechanism, it facilitates the simultaneous adjustment of the injection amount of multiple injection mechanisms arranged in a ring array.

[0038] 4. The present invention uses a pressure sensor to easily monitor the contact force between the pusher column and the limiting ring as it moves upward. In conjunction with the first and second sensors, the position of the pusher column can be determined, making it easier to control the position of the pusher column and thus the amount of refrigerant injected. Furthermore, the pressure sensor is placed on the top of the pusher column, so it does not come into contact with the refrigerant, which is convenient for long-term use. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of the disc body, the feeding mechanism, and the driving mechanism of the present invention;

[0041] Figure 3 This is a schematic cross-sectional view of the disk body of the present invention;

[0042] Figure 4 This is a schematic diagram of the injection mechanism structure of the present invention;

[0043] Figure 5 This is a schematic diagram of the mounting column, the pushing mechanism, and the rear structure of the feeding pipe of the present invention;

[0044] Figure 6 This is a schematic diagram of the right side of the cross-sectional view of the feed tube of the present invention;

[0045] Figure 7 This is a schematic diagram of the left side of the feed tube of the present invention in cross-section;

[0046] Figure 8 This is a schematic diagram of the pusher column, limiting ring, first sensor, second sensor and pressure sensor of the present invention;

[0047] Figure 9 This is a schematic diagram of the structure of the first sensor, the second sensor, and the pressure sensor of the present invention;

[0048] Figure 10 This is a schematic cross-sectional view of the cylinder block structure of the present invention;

[0049] Figure 11 This is a schematic cross-sectional view of the piston rod structure of the present invention;

[0050] Figure 12 This is a schematic diagram of the mounting column, the first air guide assembly, and the second air guide assembly of the present invention.

[0051] The reference numerals in the above figures are as follows: 1. Machine base; 2. Column; 3. Disc; 4. Drive mechanism; 5. Injection mechanism;

[0052] 41. Servo motor; 42. Gear; 43. Gear ring;

[0053] 51. Pushing mechanism; 52. Limiting mechanism; 53. Discharge pipe; 54. Mounting column; 55. Pushing column;

[0054] 511. Piston rod; 512. Pressure relief valve; 513. Connecting pipe; 514. First valve body; 515. Piston block; 516. Cylinder body; 517. First air guide assembly; 518. Second air guide assembly; 519. Insert block; 5191. Second groove; 5192. Insert rod; 5193. First groove; 5194. Vent hole;

[0055] 5171, First conduit; 5172, Second valve body; 5173, Second conduit; 5174, Pump body; 5175, Retention box;

[0056] 521. Insertion hole; 522. Mounting sleeve; 523. Externally threaded pipe; 524. Internally threaded pipe; 525. Connector; 526. Limiting ring; 527. First sensor; 528. Second sensor; 529. Pressure sensor. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] Example 1: Please refer to Figure 1 and Figure 2 A refrigerant filling machine based on a refrigeration unit includes a machine base 1, a column 2 fixedly mounted on the top of the machine base 1, and a disc 3 fixedly mounted on the top of the column 2. The top of the disc 3 is provided with a filling mechanism 5 arranged in a circular array with the center point of the disc 3 for filling refrigerant into the refrigerant.

[0059] Please see Figure 4 , Figure 5 and Figure 6 The injection mechanism 5 includes:

[0060] The discharge pipe 53 is fixedly sleeved on the top of the disc body 3 and extends to the bottom of the disc body 3. The inner wall of the discharge pipe 53 is sleeved with a pusher column 55. The side wall of the pusher column 55 and the inner side wall of the discharge pipe 53 are dynamically sealed. The top of the discharge pipe 53 is provided with a pusher mechanism 51 for driving the pusher column 55 to rise and fall. The outer wall of the discharge pipe 53 is provided with a limiting mechanism 52 for limiting the rising position of the pusher column 55, so as to adjust the amount of refrigerant charged in the discharge pipe 53.

[0061] Please see Figure 10 , Figure 11 and Figure 12 The feeding mechanism 51 includes:

[0062] The cylinder body 516 is located at the top of the feed pipe 53. The inner wall of the cylinder body 516 is fitted with a piston block 515, and the side wall of the piston block 515 and the inner side wall of the cylinder body 516 are designed to be dynamically sealed.

[0063] The piston rod 511 is fixedly disposed at the bottom of the piston block 515 and extends to the bottom of the cylinder body 516. The bottom of the piston rod 511 is fixedly connected to the top of the pusher column 55. The upper end of the outer wall and the lower end of the outer wall of the cylinder body 516 are respectively provided with a first air guide assembly 517 and a second air guide assembly 518 to drive the piston block 515 and the pusher column 55 to rise and fall.

[0064] The feeding mechanism 51 also includes;

[0065] The first groove 5193 is formed at the bottom of the pusher column 55 and extends into the piston rod 511. The top inner wall of the first groove 5193 is provided with a second groove 5191. The inner wall diameter of the second groove 5191 is larger than the inner wall diameter of the first groove 5193. The inner walls of the second groove 5191 and the first groove 5193 are respectively fitted with an insert block 519 and an insert rod 5192, and the insert block 519 and the insert rod 5192 are fixedly connected on the side that is close to each other.

[0066] The connecting pipe 513 is fixedly installed on the outer wall of the cylinder body 516, and the two ends of the connecting pipe 513 are respectively connected to the interior of the cylinder body 516 and the interior of the second groove 5191.

[0067] The outer wall of the connecting pipe 513 is provided with a first valve body 514 and a pressure relief valve 512, and the first valve body 514 is located at one end of the connecting pipe 513 near the cylinder 516. The inner side wall of the second groove 5191 is provided with a vent hole 5194.

[0068] The sidewalls of the insert block 519 and the insert rod 5192 are dynamically sealed to the inner sidewalls of the second groove 5191 and the first groove 5193, respectively. The insert rod 5192 is located on one end of the sidewall inside the second groove 5191 and is fitted with a spring at the bottom of the insert block 519 so that the insert block 519 has an upward tendency. The bottom of the insert rod 5192 is arc-shaped.

[0069] The lower end of the feeding tube 53 is arc-shaped, and the bottom of the feeding tube 53 is provided with a socket 521 that is compatible with the insertion rod 5192.

[0070] In practical implementation, after the limiting ring 526 is adjusted to the specified height by the drive mechanism 4, the limiting ring 526 limits the height of the push column 55, thereby restricting the space inside the discharge pipe 53. When refrigerant is delivered into the discharge pipe 53 through the external conveying pipe, only a specified amount of refrigerant can be filled according to the space inside the discharge pipe 53, thereby determining the amount of refrigerant to be injected.

[0071] During refrigerant filling, the pump body 5174 of the first gas guiding assembly 517 is activated, causing the pump body 5174 to transport the gas inside and outside the retention box 5175 along the second conduit 5173 to the cylinder body 516 along the first conduit 5171, and to compress the piston block 515, causing the piston block 515 to move downward, thereby driving the piston rod 511 and the pusher column 55 to move downward, so as to fill the refrigerant in the feed pipe 53 into the refrigeration machine, thus completing the refrigerant filling. As the piston block 515 moves downward, the piston block 515... Part of the gas at the bottom enters the retention box 5175 of the second gas guide assembly 518, while part of the gas enters the connecting pipe 513 and then enters the second groove 5191. During this process, the first valve body 514 is in the open state, thereby squeezing the insert block 519 and the insert rod 5192 to overcome the spring force and move downward, so that the insert rod 5192 moves downward and is inserted into the insertion hole 521, thereby reducing the refrigerant residue in the discharge pipe 53 and improving the accuracy of refrigerant charging.

[0072] After one filling is completed, gas is supplied to the bottom of the piston block 515 through the second gas guide assembly 518, thereby resetting the piston block 515. During this process, the first valve body 514 is in the closed state to ensure the stability of the piston block 515 as it rises. When the insert rod 5192 and the insert block 519 move downward, the gas at the top of the insert block 519 is discharged through the vent hole 5194. After the gas is discharged, the gas pressure at the top of the insert block 519 decreases. Under the action of the spring, the insert block 519 and the insert rod 5192 are reset for the next filling.

[0073] The first air guiding assembly 517 and the second air guiding assembly 518 have the same structure. The first air guiding assembly 517 and the second air guiding assembly 518 are located at the top and the top of the piston block 515, respectively, to drive the piston block 515 to descend or rise. The first air guiding assembly 517 includes:

[0074] The first conduit 5171 is fixedly disposed on the outer wall of the cylinder 516 and located on the top of the piston block 515. The end of the first conduit 5171 away from the cylinder 516 is connected to the retention box 5175. The end of the retention box 5175 away from the first conduit 5171 is connected to the second conduit 5173. The end of the second conduit 5173 away from the retention box 5175 is connected to the pump body 5174. The outer wall of the second conduit 5173 is provided with a second valve body 5172.

[0075] In specific implementation, the first air guide assembly 517 and the second air guide assembly 518 cooperate to facilitate the control of the piston block 515 to descend or rise, thereby facilitating the driving of the pusher column 55 to rise and fall.

[0076] By setting up a retention box 5175, the compressed gas can be easily placed into the retention box 5175 at the corresponding position when the piston block 515 moves, thus facilitating long-term use.

[0077] Example 2: Please refer to Figure 6 , Figure 7 , Figure 8 and Figure 9 The technical difference between this embodiment and Embodiment 1 is that the limiting mechanism 52 includes:

[0078] The mounting sleeve 522 is fixedly sleeved on the outer wall of the feed tube 53. The outer wall of the mounting sleeve 522 is rotatably provided with an external threaded tube 523. The outer wall of the external threaded tube 523 is threadedly connected to an internal threaded tube 524. The upper end of the outer wall of the internal threaded tube 524 is fixedly provided with a ring array of connectors 525. The connectors 525 are designed in a bent shape so that the end of the connectors 525 away from the internal threaded tube 524 extends into the feed tube 53. The top of the disc body 3 is provided with a drive mechanism 4 for synchronously driving the ring array of external threaded tubes 523 to rotate.

[0079] The limiting ring 526 is sleeved on the inner wall of the feeding tube 53, and the top of the limiting ring 526 is fixedly connected to the end of the connector 525 located inside the feeding tube 53.

[0080] The limiting mechanism 52 further includes:

[0081] Pressure sensor 529 is embedded in the bottom of limit ring 526 and is arranged symmetrically with respect to the center point of limit ring 526;

[0082] The first sensor 527 is embedded in the bottom of the limiting ring 526 and is arranged symmetrically with respect to the center point of the limiting ring 526. The first sensor 527 is arranged perpendicularly to the pressure sensor 529.

[0083] The second sensor 528 is embedded in the top of the pusher column 55 and is positioned corresponding to the first sensor 527.

[0084] In practical implementation, the drive mechanism 4 drives the external threaded tube 523 to rotate, thereby driving the internal threaded tube 524 to move under the limit of the mounting rod, so as to drive the connector 525 and the limit ring 526 to move, thereby adjusting the height of the limit ring 526, thereby adjusting the height of the limit on the push column 55, and adjusting the space for storing refrigerant in the discharge tube 53, so as to facilitate the adjustment of the refrigerant filling amount according to the actual use.

[0085] The pusher column 55 is limited by the limiting ring 526, and the piston block 515, piston rod 511 and pusher column 55 are moved by gas extrusion, so that the pusher column 55 can move a specified amount according to the limiting ring 526.

[0086] The pressure sensor 529 facilitates the monitoring of the contact force between the pusher column 55 and the limiting ring 526 as it moves upward. In conjunction with the first sensor 527 and the second sensor 528, it determines the position of the pusher column 55, making it easier to control the position of the pusher column 55 and thus the amount of refrigerant charged.

[0087] Please see Figure 3 The drive mechanism 4 includes:

[0088] Gear 42 is rotatably mounted on the top of the disk body 3. A servo motor 41 is fixedly mounted inside the column 2. The output shaft of the servo motor 41 is fixedly mounted to a rotating shaft extending to the top of the disk body 3 via a coupling. The rotating shaft is fixedly connected to the disk body 3.

[0089] The gear ring 43 is fixedly sleeved on the lower end of the outer wall of the external threaded tube 523 and meshes with the gear 42.

[0090] In practice, the servo motor 41 drives the gear 42 to rotate, which in turn drives the gear ring 43 and the external threaded tube 523 to rotate, making it easier to adjust the position of multiple limit rings 526 synchronously, thereby making it easier to adjust the injection volume of multiple injection mechanisms 5 arranged in a ring array synchronously.

[0091] The top of the disc body 3 is fixedly provided with a mounting post 54, and the upper end of the side wall of the mounting post 54 is fixedly provided with a mounting plate for mounting the pump body 5174 and the retention box 5175. The side wall of the mounting post 54 is fixedly connected to the outer wall of the cylinder body 516.

[0092] The outer wall of the internally threaded tube 524 is slidably connected to the lower end of the side wall of the mounting post 54 to limit the internally threaded tube 524.

[0093] The servo motor 41 and pressure sensor 529 of the present invention are all connected to the controller and power supply through wires to facilitate actual control and use. This is prior art and will not be described in detail here.

[0094] This invention also provides a refrigerant charging method using a refrigerant charging machine based on a refrigeration unit. The method includes the following steps:

[0095] S1: Adjust the amount of refrigerant stored in the feed pipe 53 according to the amount of refrigerant charged into the refrigeration unit, so as to fill the feed pipe 53 with a specified amount of refrigerant;

[0096] S2: After determining the amount of refrigerant to be filled in the feed pipe 53, the refrigerant is conveyed in the feed pipe 53 so that the refrigerant in the feed pipe 53 is pushed into the cooler by the pusher mechanism 51 to complete the refrigerant filling.

[0097] In step S1, the amount of refrigerant stored in the feed pipe 53 is adjusted by the limiting mechanism 52, which controls the position of the pusher column 55 as it rises.

[0098] In a specific implementation, the present invention delivers refrigerant into the feed pipe 53 via an external delivery pipe. While delivering refrigerant into the feed pipe 53, the valve at the lower end of the feed pipe 53 is closed to prevent refrigerant leakage. The valve and the external delivery pipe are existing technologies and will not be described in detail here. After the refrigerant has been delivered into the feed pipe 53, and when it is necessary to fill the cooler with refrigerant, the cooler is moved to the bottom of the feed pipe 53 by a worker or a robotic arm. Then, the valve on the outer wall of the feed pipe 53 is opened, and high-pressure gas is delivered into the cylinder 516 through the first gas guide assembly 517 to drive the piston block 515 and the piston. Rod 511 and pusher column 55 move downwards, thereby discharging the refrigerant in the discharge pipe 53 into the cooler. When piston block 515 moves downwards, it compresses the gas at the bottom of piston block 515. At this time, the first valve body 514 is open, so that the gas at the bottom of piston block 515 is compressed and enters the connecting pipe 513, and is discharged into the second groove 5191 through the connecting pipe 513. This causes the insert block 519 and insert rod 5192 to move downwards against the spring force, so as to discharge the refrigerant in the insertion hole 521 at the bottom of discharge pipe 53, thereby reducing the refrigerant residue in discharge pipe 53 and improving the accuracy of refrigerant metering.

[0099] When adjusting the refrigerant charge, the height of the limiting ring 526 is adjusted by the drive mechanism 4, thereby adjusting the height of the pusher column 55 so that only the specified amount of refrigerant can be filled into the discharge pipe 53. In conjunction with the pusher mechanism 51, the refrigerant residue in the discharge pipe 53 is reduced during the filling process, thereby improving the accuracy of the refrigerant filling.

[0100] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0101] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0102] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chiller-based refrigerant filling machine comprising a machine table, characterized by, Also include fixed in the top of the column and fixed in the top of the column body, the top of the disc is provided with a circular array arranged in the center of the disc point perfusion mechanism for the refrigerant into the refrigerant, perfusion mechanism includes: The blanking tube is fixedly sleeved on the top of the disc body and extends to the bottom of the disc body. The inner wall of the blanking tube is sleeved with a pushing column. The side wall of the pushing column is in dynamic sealing design with the inner side wall of the blanking tube. The top of the blanking tube is provided with a pushing mechanism for driving the pushing column to ascend and descend. The outer wall of the blanking tube is provided with a limiting mechanism for limiting the ascending position of the pushing column, so as to adjust the perfusion amount of the refrigerant in the blanking tube. The pushing mechanism includes: The cylinder is arranged on the top of the blanking tube. The inner wall of the cylinder is sleeved with a piston block. The side wall of the piston block is in dynamic sealing design with the inner side wall of the cylinder. The piston rod is fixedly arranged on the bottom of the piston block and extends to the bottom of the cylinder. The bottom of the piston rod is fixedly connected with the top of the pushing column. The outer wall upper end and the outer wall lower end of the cylinder are respectively provided with a first gas guide assembly and a second gas guide assembly to drive the piston block and the pushing column to ascend and descend. The pushing mechanism further includes: The first groove is arranged on the bottom of the pushing column and extends into the piston rod. The top inner wall of the first groove is provided with a second groove. The inner wall diameter of the second groove is larger than that of the first groove. The second groove and the first groove are respectively sleeved with an insertion block and an insertion rod. The insertion block is fixedly connected with the side of the insertion rod which is close to each other. The connecting pipe is fixedly arranged on the outer wall of the cylinder. The two ends of the connecting pipe are respectively communicated with the inside of the cylinder and the inside of the second groove. The outer wall of the connecting pipe is provided with a first valve body and a pressure relief valve. The first valve body is located at the end of the connecting pipe close to the cylinder. The inner side wall of the second groove is provided with a gas vent. The side walls of the insertion block and the insertion rod are respectively in dynamic sealing design with the inner side walls of the second groove and the first groove. The side wall of the end of the insertion rod located in the second groove and the bottom of the insertion block are sleeved with a spring, so that the insertion block has a tendency to move upward. The bottom of the insertion rod is in arc design. The lower end of the blanking tube is in arc design. The bottom of the blanking tube is provided with an insertion hole matched with the insertion rod. The limiting mechanism includes: The mounting sleeve is fixedly sleeved on the outer wall of the blanking tube. The outer wall of the mounting sleeve is rotatably provided with an external threaded pipe. The outer wall of the external threaded pipe is threadedly connected with an internal threaded pipe. The outer wall upper end of the internal threaded pipe is fixedly provided with a ring array arranged connecting piece. The connecting piece is in bent design, so that the end of the connecting piece away from the internal threaded pipe extends into the blanking tube. The top of the disc body is provided with a driving mechanism for synchronously driving the rotation of the ring array arranged external threaded pipes. The limiting ring is sleeved on the inner wall of the blanking tube. The top of the limiting ring is fixedly connected with the end of the connecting piece located in the blanking tube.

2. A chiller-based refrigerant filling machine according to claim 1, wherein The first gas guide assembly and the second gas guide assembly are the same structure. The first gas guide assembly and the second gas guide assembly are respectively located at the top and the bottom of the piston block to drive the piston block to descend or ascend. The first gas guide assembly includes: The first conduit is fixed on the outer wall of the cylinder body and located at the top of the piston block. The first conduit is connected with the retention tank at the end away from the cylinder body. The retention tank is connected with the second conduit at the end away from the first conduit. The second conduit is connected with the pump body at the end away from the retention tank. The outer wall of the second conduit is provided with the second valve body.

3. A chiller-based refrigerant filling machine according to claim 1, wherein The limiting mechanism further comprises: The pressure sensor is embedded in the bottom of the limiting ring and symmetrically arranged with the center point of the limiting ring. The first inductor is embedded in the bottom of the limiting ring and symmetrically arranged with the center point of the limiting ring. The first inductor is vertically arranged with the pressure sensor. The second inductor is embedded in the top of the pushing column and arranged corresponding to the position of the first inductor.

4. A chiller-based refrigerant filling machine according to claim 1, wherein The driving mechanism comprises: The gear is rotatably arranged on the top of the disc body. The servo motor is fixedly arranged in the inner part of the column body. The output shaft of the servo motor is fixedly connected with the rotating shaft extending to the top of the disc body through the shaft coupling. The rotating shaft is fixedly connected with the disc body. The tooth ring is fixedly sleeved on the lower end of the outer wall of the outer threaded pipe and engaged with the gear.

5. A chiller-based refrigerant filling machine according to claim 1, wherein The mounting column is fixedly arranged on the top of the disc body. The mounting plate for mounting the pump body and the retention tank is fixedly arranged on the side wall of the mounting column. The side wall of the mounting column is fixedly connected with the outer wall of the cylinder body. The outer wall of the inner threaded pipe is slidingly connected with the lower end of the side wall of the mounting column to limit the inner threaded pipe.

6. A method of filling based on a chiller refrigerant filling machine, characterized by, The method comprises the following steps: S1: adjusting the amount of refrigerant stored in the feeding pipe according to the filling amount of the refrigerant in the refrigeration machine to fill the specified amount of refrigerant in the feeding pipe; S2: conveying the refrigerant in the feeding pipe to push all the refrigerant in the feeding pipe into the cooling machine through the pushing mechanism to complete the filling of the refrigerant.

7. A method of filling according to claim 6, wherein, The amount of refrigerant stored in the feeding pipe in the step S1 is controlled by the limiting mechanism to limit the position of the pushing column rising.

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