A high and low temperature integrated machine refrigerant filling system and method

Abstract

The application discloses a high-low temperature integrated machine refrigerant filling system and method, relates to the refrigerant filling technical field, and is used for adding refrigerant to an integrated machine and comprises the following parts: a mechanical arm, which is provided with an adjusting end; a temporary storage component, which is arranged on the adjusting end; a three-way valve, three communicating ends of which are respectively communicated with a filling head, the temporary storage component and a bypass pipe; a negative pressure suction component, which is communicated with the bypass pipe; and a liquid supply component, which comprises a supply cylinder, a calibration cylinder and a liquid supply hose connected in sequence, one end of the liquid supply hose is communicated with the temporary storage component, the other end is provided with a filling valve, and the temporary storage component can collect the residual refrigerant in the liquid supply hose after filling the refrigerant. When the amount of the refrigerant exceeds a refrigerant threshold range, an alarm is given, so that an operator can find and handle the problem.

Description

Technical Field

[0001] This invention relates to the field of refrigerant charging technology, specifically to a high and low temperature integrated refrigerant charging system and method. Background Technology

[0002] During the operation of a high and low temperature integrated unit, a refrigeration system is required to supply low temperatures, and the normal operation of the refrigeration system depends on the circulation of refrigerant. Therefore, refrigerant charging is a crucial step in the production, maintenance, and upkeep of high and low temperature integrated units.

[0003] Research and analysis revealed that traditional refrigerant charging methods lack an effective locking mechanism after connection, making them prone to detachment during the charging process. Furthermore, after charging, the refrigerant remaining in the charging hose cannot be effectively recovered, resulting in refrigerant waste. Additionally, the amount of residual refrigerant is difficult to measure accurately, making it impossible to determine if any abnormalities exist.

[0004] Therefore, it is necessary to provide a high and low temperature integrated refrigerant charging system and method to solve the above problems. Summary of the Invention

[0005] To solve the above problems, the present invention provides the following technical solution: a high and low temperature integrated unit refrigerant charging system, used to add refrigerant to the integrated unit, comprising: A robotic arm having an adjustable end; A temporary storage component is disposed at the adjustment end; The three-way valve has three connecting ends that are respectively connected to the filling head, the temporary storage component, and the bypass pipe; A negative pressure suction assembly, which is connected to the bypass pipe; The liquid supply assembly includes a supply cylinder, a calibration cylinder, and a liquid supply hose connected in series. One end of the liquid supply hose is connected to a temporary storage assembly, and the other end is equipped with a filling valve. The temporary storage assembly can collect the refrigerant remaining in the liquid supply hose after refrigerant is added. When the amount of refrigerant exceeds the refrigerant threshold range, an alarm is triggered.

[0006] Furthermore, preferably, the temporary storage component includes: The mounting compartment is fixed to the adjustment end; A connecting cylinder is disposed inside the installation chamber, with one end of the connecting cylinder connected to a three-way valve and the other end being a closed end; An extension tube, which is vertically connected to the connecting cylinder, extends out of the installation chamber and connects to the liquid supply hose.

[0007] Furthermore, as a preferred embodiment, the connecting cylinder is integrally connected with an expansion groove, and a piston is slidably disposed inside the connecting cylinder. The piston is driven by a telescopic rod. During filling, the telescopic rod drives the piston to be located at the expansion groove position, and the liquid in the extension tube can flow through the connecting cylinder and the expansion groove into the three-way valve. After filling, the telescopic rod drives the piston past the expansion groove and the extension tube, and the liquid in the connecting cylinder can be blocked by the piston and stored between the connecting cylinder and the piston.

[0008] Furthermore, as a preferred embodiment, a pressure sensor is provided at the closed end of the connecting cylinder. After refrigerant is added, when the pressure detected by the pressure sensor reaches the pressure threshold, the telescopic rod stops and records the amount of retraction. The amount of refrigerant collected is determined based on the amount of retraction.

[0009] Furthermore, as a preferred embodiment, a vibrating rod is connected to the extension tube via a spring, the vibrating rod is also connected to the liquid supply hose, the lower end of the vibrating rod has a first magnetic block, and second magnetic blocks corresponding to the first magnetic block are embedded at intervals on the surface of the telescopic rod.

[0010] Furthermore, preferably, the dispensing head includes: The quick connector has multiple stepped grooves inside, and the side wall of the bottommost stepped groove is the first wedge surface. Connector for connecting quick couplings and three-way valves; A one-way valve is provided in the connecting seat, which initially allows external fluid to flow to the connecting seat; The integrated device includes a receiving head corresponding to the quick connector. The receiving head has a second wedge surface corresponding to the first wedge surface. The two surfaces work together to limit the depth of the receiving head entering the quick connector. The middle part of the receiving head is connected to a tube for pushing the ball in the one-way valve. The upper end of the receiving head has a sealing ring.

[0011] Furthermore, preferably, the sidewall of the receiving head is provided with multiple inner wedge surfaces; The quick connector has an annular groove in the middle for installing a locking component. The locking component engages with the inner wedge surface to prevent the receiver head from disengaging from the quick connector.

[0012] Furthermore, preferably, the locking assembly includes: An outer ring, which is fixed in the annular groove, also integrally extends inward to form an extension seat for radially sliding connection of the sliding column; An inner ring is rotatably mounted on the inner wall of the outer ring, and an arc-shaped groove is provided on the inner ring; A limiting post is fixed on the sliding post and extends into the arc-shaped groove; A wedge block, which is fixed to the sliding column; A driver is used to drive the inner ring to rotate.

[0013] Furthermore, preferably, the negative pressure suction assembly includes: Mounting bracket, which is fixed to the adjustment end; The suction tube is mounted on the mounting bracket, with one end connected to the bypass pipe and the other end connected to the suction pump.

[0014] A method for refrigerant charging of a high and low temperature integrated unit includes the following steps: S1. Control the movement of the adjusting end of the robotic arm so that the filling head docks with the receiving head of the integrated machine; S2. Control the telescopic rod to drive the piston to the expansion slot position, so that the extension tube is connected to the three-way valve; S3. Turn on the liquid supply assembly. The refrigerant enters the integrated unit in sequence through the supply cylinder, calibration cylinder, supply hose, extension pipe, connecting cylinder, expansion groove, three-way valve and filling head. S4. After the refrigerant is added, control the telescopic rod to drive the piston. The telescopic rod drives the piston past the expansion groove and extension tube, so that the refrigerant in the connecting cylinder is blocked by the piston and stored between the connecting cylinder and the piston. S5. The pressure is detected by the pressure sensor at the closed end of the connecting cylinder. When the pressure reaches the pressure threshold, the telescopic rod stops and the amount of retraction is recorded. The amount of refrigerant collected is determined based on the amount of retraction. An alarm is triggered when the amount of collected refrigerant exceeds the refrigerant threshold range.

[0015] Compared with the prior art, the present invention provides a high and low temperature integrated refrigerant charging system and method, which has the following beneficial effects: In this invention, by setting up a robotic arm and an adjustment end, precise docking between the filling head and the integrated receiving head can be achieved, avoiding the problems of low accuracy and easy leakage of manual docking, and improving the safety and reliability of the filling operation.

[0016] In this invention, by setting up a temporary storage component, the residual refrigerant in the supply hose can be effectively collected after the refrigerant is added, thus avoiding refrigerant waste. At the same time, through pressure sensors and retraction detection, the amount of refrigerant recovered can be accurately measured, and an alarm can be set in time when the amount of recovered refrigerant is abnormal, so that operators can easily find and deal with the problem.

[0017] In this invention, by setting a wedge-shaped mating structure between the quick connector and the receiving head, the docking depth can be limited to ensure accurate docking position; by setting a locking component, the receiving head can be locked after docking to prevent detachment during the filling process, thereby improving the safety of the filling operation. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of a high and low temperature integrated refrigerant charging system; Figure 2 A three-dimensional structural diagram of the robotic arm, temporary storage components, and dispensing head; Figure 3 This is a cross-sectional view of the temporary storage component. Figure 4 A cross-sectional view of the filling head and receiving head; Figure 5 Schematic diagram of the three-dimensional half-section structure of the filling head Figure 1 ; Figure 6 Schematic diagram of the three-dimensional half-section structure of the filling head Figure 2 ; Figure 7 This is a schematic diagram of the three-dimensional structure of the inner ring; In the diagram: 1. Robotic arm; 2. Adjustment end; 3. Mounting frame; 4. Suction pipe; 5. Suction pump; 6. Temporary storage assembly; 7. Three-way valve; 8. Bypass pipe; 9. Filling head; 10. Supply hose; 11. Calibration cylinder; 12. Supply cylinder; 13. Integrated unit; 61. Installation chamber; 62. Connecting cylinder; 63. Expansion groove; 64. Piston; 65. Telescopic rod; 66. Extension pipe; 67. Vibration rod ; 68. Spring; 91. Quick connector; 911. Stepped groove; 92. Connecting seat; 93. One-way valve; 94. Locking assembly; 131. Receiver head; 132. Insert tube; 133. Inner wedge surface; 134. Sealing ring; 941. Outer ring; 942. Inner ring; 943. Sliding column; 944. Limiting column; 945. Wedge block; 946. Arc groove; 947. Driver; 948. Extension seat. Detailed Implementation

[0019] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0020] Example: In this embodiment of the invention, please refer to... Figures 1-7A refrigerant charging system for a high and low temperature integrated machine (13) is provided, used to add refrigerant to the integrated machine (13). The system includes: a robotic arm 1 with an adjustment end 2; a temporary storage component 6 disposed at the adjustment end 2; a three-way valve 7 with three connecting ends respectively connected to a charging head 9, the temporary storage component 6, and a bypass pipe 8; a negative pressure suction component connected to the bypass pipe 8; and a liquid supply component including a supply cylinder 12, a calibration cylinder 11, and a liquid supply hose 10 connected in series. One end of the liquid supply hose 10 is connected to the temporary storage component 6, and the other end is equipped with a charging valve. The temporary storage component 6 can collect residual refrigerant in the liquid supply hose 10 after refrigerant charging. When the amount of refrigerant exceeds the refrigerant threshold range, an alarm is triggered.

[0021] The robotic arm 1 can be a multi-axis robotic arm, a Cartesian coordinate robot, or a SCARA robot, etc., and its number of degrees of freedom can be selected according to actual needs, such as a four-axis, five-axis, or six-axis robotic arm. The adjustment end 2 is the end effector of the robotic arm 1. Through the cooperation of the robotic arm 1 and the adjustment end 2, the filling head 9 and the receiving head 131 of the integrated machine 13 can be accurately docked, which can effectively avoid the problems of low accuracy and easy leakage of manual docking.

[0022] The three-way valve 7 has three connecting ends connected to the charging head 9, the temporary storage component 6, and the bypass pipe 8, respectively. The three-way valve 7 can be an electric three-way ball valve, a solenoid three-way valve, or a manual three-way valve, used to switch the refrigerant flow path. When the three-way valve 7 is in the first position, the temporary storage component 6 is connected to the charging head 9, and the refrigerant can flow from the temporary storage component 6 to the charging head 9. When the three-way valve 7 is in the second position, the charging head 9 is connected to the bypass pipe 8, and the integrated unit 13 can be evacuated by the negative pressure suction component to remove air and residual gas from the integrated unit 13. The specific structure of the negative pressure suction component will be described in detail in subsequent embodiments.

[0023] In addition, the calibration cylinder 11 is used to measure the amount of refrigerant added. One end of the supply hose 10 is connected to the temporary storage component 6, and the other end is equipped with a filling valve. The supply hose 10 can be made of a high-pressure resistant and corrosion-resistant hose material, such as PTFE hose or stainless steel corrugated hose. The temporary storage component 6 can collect the refrigerant remaining in the supply hose 10 after refrigerant is added. When the amount of refrigerant exceeds the refrigerant threshold range, an alarm is triggered. Under normal circumstances, the amount of residual refrigerant should be within a reasonable range. If it exceeds this range, it indicates that the amount of refrigerant added is insufficient, and there may be a leak or other abnormality, requiring timely alarm to remind the operator to check and handle the situation. The alarm method can be audible and visual alarm, display screen prompt, or remote notification.

[0024] In this embodiment, the temporary storage component 6 includes: The mounting compartment 61 is fixed to the adjustment end 2; A connecting cylinder 62 is disposed inside the installation chamber 61. One end of the connecting cylinder 62 is connected to the three-way valve 7, and the other end is a closed end. An extension tube 66 is vertically connected to the connecting cylinder 62 and extends out of the mounting chamber 61 to communicate with the liquid supply hose 10.

[0025] During implementation, the refrigerant enters the connecting cylinder 62 from the supply hose 10 via the extension pipe 66, and then flows from the connecting cylinder 62 to the three-way valve 7. After refrigerant filling is completed, any remaining refrigerant in the connecting cylinder 62 can be collected and stored, avoiding refrigerant waste.

[0026] Furthermore, an expansion groove 63 is integrally connected to the connecting cylinder 62. The shape of the expansion groove 63 can be circular, elliptical, or rectangular, etc. A piston 64 is slidably disposed inside the connecting cylinder 62. The piston 64 is driven by a telescopic rod 65, which can be a hydraulic telescopic cylinder, a pneumatic cylinder, or an electric push rod, etc. During filling, the telescopic rod 65 drives the piston 64 to the position of the expansion groove 63. The liquid in the extension tube 66 can flow through the connecting cylinder 62 and the expansion groove 63 into the three-way valve 7. After filling, the telescopic rod 65 drives the piston 64 past the expansion groove 63 and the extension tube 66. The liquid in the connecting cylinder 62 can be blocked by the piston 64 and stored between the connecting cylinder 62 and the piston 64.

[0027] During refrigerant charging, the telescopic rod 65 drives the piston 64 to the position of the expansion groove 63. At this time, the liquid in the extension tube 66 can flow through the connecting tube 62 and the expansion groove 63 into the three-way valve 7. Since the piston 64 is located in the expansion groove 63, it will not obstruct the flow of refrigerant, and the refrigerant can flow smoothly through the expansion groove 63 to the three-way valve 7. After charging, the telescopic rod 65 drives the piston 64 past the expansion groove 63 and the extension tube 66. The liquid in the connecting tube 62 can be blocked by the piston 64 and stored between the connecting tube 62 and the piston 64, realizing the collection and storage of residual refrigerant. This residual refrigerant can be added to the next charging process.

[0028] Furthermore, a pressure sensor is provided at the closed end of the connecting cylinder 62. The pressure sensor can be a piezoresistive pressure sensor, a capacitive pressure sensor, or a piezoelectric pressure sensor, etc. After refrigerant is added, when the pressure detected by the pressure sensor reaches the pressure threshold, the telescopic rod 65 stops and records the amount of retraction. The amount of refrigerant collected is determined based on the amount of retraction.

[0029] The pressure threshold is a preset pressure value. When the pressure reaches this value, it indicates that the piston 64 has compressed the remaining refrigerant to the required position. The retraction amount is the travel distance of the telescopic rod 65 from the filling position to the current position. This distance is the same as the distance the piston 64 moves. The volume of stored refrigerant, i.e., the amount of refrigerant, can be calculated based on the cross-sectional area of ​​the piston 64 and the travel distance.

[0030] In this embodiment, a vibrating rod 67 is connected to the extension tube 66 via a spring 68. The vibrating rod 67 is also connected to the liquid supply hose 10. The lower end of the vibrating rod 67 has a first magnetic block, and second magnetic blocks corresponding to the first magnetic block are embedded at intervals on the surface of the telescopic rod 65.

[0031] After refueling is completed, during the movement of the telescopic rod 65, the second magnetic block interacts with the first magnetic block, driving the vibrating rod 67 to vibrate. The vibration of the vibrating rod 67 is transmitted to the liquid supply hose 10, causing the residual refrigerant attached to the inner wall of the hose to fall off, thereby improving the refrigerant recovery efficiency. Specifically, when the telescopic rod 65 moves, the second magnetic block moves accordingly. When the second magnetic block approaches the first magnetic block, the magnetic force causes the vibrating rod 67 to be displaced. When the second magnetic block moves away from the first magnetic block, the elastic force of the spring 68 causes the vibrating rod 67 to return to its original position, thereby generating vibration. In one embodiment, the first magnetic block and the second magnetic block are configured to repel each other, and in another embodiment, the first magnetic block and the second magnetic block are configured to attract each other. Both configurations can achieve the interaction between the second magnetic block and the first magnetic block, thereby causing the vibrating rod 67 to vibrate.

[0032] In this embodiment, the dispensing head 9 includes: The quick connector 91 has multiple stepped grooves 911 inside, and the side wall of the step groove 911 at the bottom is the first wedge surface. Connector 92 is used to connect quick connector 91 and three-way valve 7; A one-way valve 93 is disposed in the connecting seat 92, which initially allows external fluid to flow to the connecting seat 92; The integrated machine 13 includes a receiving head 131 corresponding to the quick connector 91. The receiving head 131 has a second wedge surface corresponding to the first wedge surface. The two cooperate to limit the depth of the receiving head 131 entering the quick connector 91. The middle part of the receiving head 131 is connected to a tube 132 for pushing the ball in the one-way valve 93. The upper end of the receiving head 131 has a sealing ring 134.

[0033] The one-way valve 93 is disposed in the connector 92, allowing external fluid to flow to the connector 92 in the initial state. The one-way valve 93 can be a ball valve, a disc valve, or a diaphragm valve, etc. In the initial state, the one-way valve 93 is closed. When the insertion tube 132 of the receiver 131 is inserted and pushes the ball in the one-way valve 93, the one-way valve 93 opens, allowing refrigerant to flow from the connector 92 to the integrated unit 13. The integrated unit 13 includes a receiver 131 corresponding to the quick connector 91. The receiver 131 has a second wedge surface corresponding to the first wedge surface, and the two cooperate to limit the depth of the receiver 131 entering the quick connector 91. When the receiver 131 is inserted into the quick connector 91, the second wedge surface contacts the first wedge surface. Due to the guiding effect of the wedge surface, the receiver 131 can be accurately aligned. When the wedge surfaces are fully engaged, the receiver 131 cannot continue to penetrate, thereby limiting the docking depth and ensuring accurate docking position.

[0034] In this embodiment, the sidewall of the receiving head 131 is provided with a plurality of inner wedge surfaces 133; The quick connector 91 has an annular groove in the middle for installing a locking component 94. The locking component 94 cooperates with the inner wedge surface 133 to prevent the receiving head 131 from disengaging from the quick connector 91.

[0035] Specifically, the locking assembly 94 includes: An outer ring 941 is fixed in the annular groove. The outer ring 941 also integrally extends inward to form an extension seat 948 for radially sliding connection of the slide column 943. The inner ring 942 is rotatably disposed on the inner wall of the outer ring 941, and the inner ring 942 is provided with an arc-shaped groove 946; A limiting post 944 is fixed to the sliding post 943 and extends into the arc-shaped groove 946; Wedge 945, which is fixed on the sliding column 943; A driver 947 is used to drive the inner ring 942 to rotate.

[0036] When locking, the driver 947 drives the inner ring 942 to rotate, the arc groove 946 pushes the limiting post 944, causing the sliding post 943 to slide inward, and the wedge 945 to engage with the inner wedge surface 133 of the receiver head 131, thus achieving locking; when unlocking, the driver 947 drives the inner ring 942 to rotate in the opposite direction, the arc groove 946 pushes the limiting post 944, causing the sliding post 943 to slide outward, and the wedge 945 to disengage from the inner wedge surface 133, thus achieving unlocking.

[0037] In this embodiment, the negative pressure suction assembly includes: Mounting bracket 3 is fixed to the adjusting end 2; The suction pipe 4 is mounted on the mounting bracket 3, with one end connected to the bypass pipe 8 and the other end connected to the suction pump 5.

[0038] The function of suction pump 5 is to perform vacuuming of the system, remove air and residual gas from the system, and ensure the quality of refrigerant charging.

[0039] This embodiment also provides a refrigerant charging method for a high and low temperature integrated unit, including the following steps: S1. Control the adjustment end 2 of the robotic arm 1 to move so that the filling head 9 docks with the receiving head 131 of the integrated machine 13; S2. Control the telescopic rod 65 to drive the piston 64 to move to the position of the expansion groove 63, so that the extension tube 66 is connected to the three-way valve 7; S3. Turn on the liquid supply assembly. The refrigerant enters the integrated machine 13 in sequence through the supply cylinder 12, calibration cylinder 11, liquid supply hose 10, extension pipe 66, connecting cylinder 62, expansion groove 63, three-way valve 7 and filling head 9. S4. After the refrigerant is added, the telescopic rod 65 drives the piston 64 to pass over the expansion groove 63 and the extension tube 66, so that the refrigerant in the connecting cylinder 62 is blocked by the piston 64 and stored between the connecting cylinder 62 and the piston 64. Specifically, after the refrigerant is added to the predetermined dosage, the refrigerant valve is closed, the telescopic rod 65 is controlled to move, and the piston 64 is driven to move towards the closed end of the connecting cylinder 62, passing over the expansion groove 63 and the extension tube 66, so that the refrigerant remaining in the connecting cylinder 62 is sealed and stored in the space between the piston 64 and the closed end. S5. The pressure is detected by the pressure sensor at the closed end of the connecting cylinder 62. When the pressure reaches the pressure threshold, the telescopic rod 65 stops and records the amount of retraction. The amount of refrigerant collected is determined based on the amount of retraction. An alarm is triggered when the amount of collected refrigerant exceeds the refrigerant threshold range. The amount of stored refrigerant is calculated based on the amount of retraction and the cross-sectional area of ​​the piston 64 and compared with the preset threshold range. If it exceeds the range, an alarm signal is issued to remind the operator to check for leaks or other abnormalities.

[0040] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high and low temperature integrated refrigerant charging system for adding refrigerant to an integrated unit (13), characterized in that, include: A robotic arm (1) having an adjustment end (2); Temporary storage component (6), which is disposed at the adjustment end (2); The three-way valve (7) has three connecting ends connected to the filling head (9), the temporary storage component (6), and the bypass pipe (8), respectively. A negative pressure suction assembly, which is connected to the bypass pipe (8); The liquid supply assembly includes a supply cylinder (12), a calibration cylinder (11), and a liquid supply hose (10) connected in series. One end of the liquid supply hose (10) is connected to a temporary storage assembly (6), and the other end is equipped with a filling valve. The temporary storage assembly (6) can collect the refrigerant remaining in the liquid supply hose (10) after adding refrigerant. When the amount of refrigerant exceeds the refrigerant threshold range, an alarm is triggered.

2. The high and low temperature integrated refrigerant charging system according to claim 1, characterized in that, The temporary storage component (6) includes: The mounting compartment (61) is fixed to the adjustment end (2); A connecting cylinder (62) is disposed in the installation chamber (61). One end of the connecting cylinder (62) is connected to a three-way valve (7), and the other end is a closed end. An extension tube (66) is vertically connected to the connecting cylinder (62) and extends out of the mounting chamber (61) to communicate with the liquid supply hose (10).

3. The high and low temperature integrated refrigerant charging system according to claim 2, characterized in that, An expansion groove (63) is integrally connected to the connecting cylinder (62). A piston (64) is slidably disposed inside the connecting cylinder (62). The piston (64) is driven by a telescopic rod (65). During filling, the telescopic rod (65) drives the piston (64) to be located at the position of the expansion groove (63). The liquid in the extension tube (66) can flow through the connecting cylinder (62) and the expansion groove (63) into the three-way valve (7). After filling, the telescopic rod (65) drives the piston (64) to pass over the expansion groove (63) and the extension tube (66). The liquid in the connecting cylinder (62) can be blocked by the piston (64) and stored between the connecting cylinder (62) and the piston (64).

4. The high and low temperature integrated refrigerant charging system according to claim 3, characterized in that, The closed end of the connecting cylinder (62) is equipped with a pressure sensor. After refrigerant is added, when the pressure detected by the pressure sensor reaches the pressure threshold, the telescopic rod (65) stops and records the amount of retraction. The amount of refrigerant collected is determined based on the amount of retraction.

5. The high and low temperature integrated refrigerant charging system according to claim 3, characterized in that, The extension tube (66) is connected to a vibrating rod (67) by a spring (68). The vibrating rod (67) is also connected to the liquid supply hose (10). The lower end of the vibrating rod (67) has a first magnetic block, and the surface of the telescopic rod (65) is interposed with second magnetic blocks corresponding to the first magnetic block.

6. The high and low temperature integrated refrigerant charging system according to claim 1, characterized in that, The dispensing head (9) includes: The quick connector (91) has multiple stepped grooves (911) inside, and the side wall of the stepped groove (911) at the bottom is the first wedge surface; Connecting seat (92) for connecting quick connector (91) and three-way valve (7); A one-way valve (93) is disposed in the connecting seat (92) and initially allows external fluid to flow to the connecting seat (92). The integrated machine (13) includes a receiving head (131) corresponding to the quick connector (91). The receiving head (131) has a second wedge surface corresponding to the first wedge surface. The two cooperate to limit the depth of the receiving head (131) entering the quick connector (91). The middle part of the receiving head (131) is connected to a tube (132) for pushing the ball in the one-way valve (93). The upper end of the receiving head (131) has a sealing ring (134).

7. The high and low temperature integrated refrigerant charging system according to claim 6, characterized in that, The sidewall of the receiver head (131) is provided with multiple inner wedge surfaces (133). The quick connector (91) has an annular groove in the middle for installing a locking component (94). The locking component (94) engages with the inner wedge surface (133) to prevent the receiving head (131) from disengaging from the quick connector (91).

8. The high and low temperature integrated refrigerant charging system according to claim 7, characterized in that, The locking assembly (94) includes: An outer ring (941) is fixed in the annular groove, and the outer ring (941) also extends inward integrally to form an extension seat (948) for radially sliding connection of the slide column (943). The inner ring (942) is rotatably disposed on the inner wall of the outer ring (941), and the inner ring (942) is provided with an arc groove (946). A limiting post (944) is fixed to the sliding post (943) and extends into the arc-shaped groove (946); A wedge (945) is fixed to the sliding column (943); A driver (947) is used to drive the inner ring (942) to rotate.

9. The high and low temperature integrated refrigerant charging system according to claim 1, characterized in that, The negative pressure suction assembly includes: Mounting bracket (3), which is fixed to the adjustment end (2); The suction pipe (4) is mounted on the mounting bracket (3), with one end connected to the bypass pipe (8) and the other end connected to the suction pump (5).

10. A method for refrigerant charging of a high and low temperature integrated unit, comprising using the high and low temperature integrated unit refrigerant charging system as described in any one of claims 4-9, characterized in that, Includes the following steps: S1. Control the adjustment end (2) of the robotic arm (1) to move so that the filling head (9) docks with the receiving head (131) of the integrated machine (13); S2. Control the telescopic rod (65) to drive the piston (64) to move to the position of the expansion groove (63), so that the extension tube (66) is connected to the three-way valve (7); S3. Turn on the liquid supply assembly. The refrigerant enters the integrated machine (13) in sequence through the supply cylinder (12), calibration cylinder (11), liquid supply hose (10), extension pipe (66), connecting cylinder (62), expansion groove (63), three-way valve (7) and filling head (9). S4. After the refrigerant is added, control the telescopic rod (65) to drive the piston (64). The telescopic rod (65) drives the piston (64) to pass over the expansion groove (63) and the extension tube (66), so that the refrigerant in the connecting cylinder (62) is blocked by the piston (64) and stored between the connecting cylinder (62) and the piston (64). S5. The pressure is detected by the pressure sensor at the closed end of the connecting cylinder (62). When the pressure reaches the pressure threshold, the telescopic rod (65) stops and the amount of retraction is recorded. The amount of refrigerant collected is determined based on the amount of retraction. An alarm is triggered when the amount of refrigerant collected exceeds the refrigerant threshold range.

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