Refrigerant filling and discharging device for refrigeration equipment

Abstract

The invention provides a refrigerant filling and discharging device for refrigeration equipment. The refrigerant filling and discharging device comprises a refrigerant storage tank and a grip fixedly installed at the bottom of the refrigerant storage tank. One end of the valve is connected with a tank opening of the refrigerant storage tank, and the other end of the valve is connected with a connector; one end, far away from the joint, of the straight pipe is provided with a pressure gauge, and one end, far away from the straight pipe, of the pressure gauge is provided with an end socket; the protection mechanism is arranged at the end, and the protection mechanism is provided with a movable protection cover; an exhaust port is formed in the bottom of the connector, and the opening and closing mechanism is arranged below the exhaust port. Through the arrangement of the exhaust port and the opening and closing mechanism, before filling and after connection with the refrigeration equipment, residual refrigerants in the refrigeration equipment are exhausted through the exhaust port by opening the exhaust port, so that air in the connector, the straight pipe and the end is exhausted, and the situation that the air in the pipeline enters the refrigeration equipment during follow-up filling is avoided.

Description

Technical Field

[0001] The present invention relates to the field of refrigerant filling, and particularly to a refrigerant filling and discharging device for a refrigeration device. Background Art

[0002] Refrigeration devices refer to devices mainly used for refrigeration, freezing, and air conditioning, and are widely used in food preservation, industrial production, scientific research, and daily life.

[0003] Among them, after a refrigeration device is used for a period of time, it needs to be filled with supplementary refrigerant to ensure the refrigeration effect; currently, in the process of filling with the traditional filling device, there will be air in the pipeline connecting it to the refrigeration device. When filling, through the air pressure of the refrigerant storage tank, this part of the air will be injected into the refrigeration device, which may affect the subsequent use of the refrigeration device. Summary of the Invention

[0004] The present invention provides a refrigerant filling and discharging device for a refrigeration device to solve the technical problem that air in the filling pipeline enters the refrigeration device and affects the use of the refrigeration device.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides a refrigerant filling and discharging device for a refrigeration device, including a refrigerant storage tank and a grip fixedly installed at the bottom of the refrigerant storage tank; it further includes: a valve, one end of the valve is connected to the tank mouth of the refrigerant storage tank, and the other end of the valve is connected with a joint; the joint is connected with a straight pipe, a pressure gauge is installed at the end of the straight pipe away from the joint, and a head is installed at the end of the pressure gauge away from the straight pipe; a protection mechanism, the protection mechanism is arranged at the head, and the protection mechanism is provided with a movable protection cover; the protection cover is connected with an elastic pressurizing part; an opening and closing mechanism, an exhaust port is opened at the bottom of the joint, and the opening and closing mechanism is arranged below the exhaust port.

[0007] In this technical solution, through the arrangement of the exhaust port and the opening and closing mechanism, before filling the refrigerant, after the whole device is connected to the filling port of the refrigeration device, by opening the exhaust port, the residual refrigerant in the refrigeration device is discharged through the exhaust port to discharge the air in the joint, the straight pipe and the head, avoiding the air in the above pipeline from entering the refrigeration device during subsequent filling, and ensuring the filling effect.

[0008] Preferably, the protection mechanism includes a fixed seat; the fixed seat is fixedly installed on the outer wall of the head, one end of the elastic pressurizing part is rotatably connected to the fixed seat, and the other end of the elastic pressurizing part is connected to the protection cover.

[0009] In this technical solution, by moving the protective cover, it is possible to cover or cancel the covering of the end face of the end head, so as to protect or cancel the protection of the end head.

[0010] Preferably, the elastic pressing part includes a square sleeve and a connecting rod; one end of the square sleeve is fixedly connected with a rotating rod, the rotating rod is connected with the fixed seat, the connecting rod is connected with the square sleeve with a clearance fit, and a first spring is arranged in the square sleeve. The connecting rod and the square sleeve are elastically connected through the first spring. One end of the connecting rod is bent, and the bent end of the connecting rod is fixedly connected with the protective cover.

[0011] In this technical solution, when the protective cover covers the end face of the end head, the elastic pressing part is used for pressing the protective cover to improve the sealing effect.

[0012] Preferably, an internal thread is provided on the inner wall of the joint, an external thread is provided on the outer wall of one end of the straight pipe, and the straight pipe and the joint are connected through the internal thread and the external thread.

[0013] In this technical solution, the detachable connection between the straight pipe and the joint is realized through threaded connection.

[0014] Preferably, the opening and closing mechanism includes an adjustment part and an elastic telescopic rod. The elastic telescopic rod is slidably connected with a chute opened on one side of the handle. One end of the elastic connecting rod is connected with a pulling seat. A movable plate is fixedly connected to the top of the pulling seat. A sealing gasket is arranged on the top surface of the movable plate, and the sealing gasket is attached to the bottom of the exhaust port.

[0015] In this technical solution, the opening and closing mechanism is used for controlling the opening and closing of the exhaust port.

[0016] Preferably, the elastic telescopic rod includes a sleeve, a guiding strip and a second spring; the second spring is arranged in the sleeve, the guiding strip is connected with the sleeve with a clearance fit, and one end of the guiding strip is elastically connected with the inner wall of the sleeve through the second spring. One end of the guiding strip is fixedly connected with the pulling seat.

[0017] In this technical solution, after the exhaust port is opened, the elastic telescopic rod is used to drive the movable plate to reset, so that the exhaust port is closed.

[0018] Preferably, the adjustment part includes a threaded rod; the top end of the threaded rod is rotatably connected with the bottom of the sleeve. A straight groove communicating with the bottom of the chute is opened at the bottom of the handle. A fixed nut is fixedly installed at the top end of the straight groove, a rotating shaft is rotatably installed at the bottom end of the straight groove, the threaded rod is threadedly connected with the fixed nut, and a matching groove is opened in the middle of the threaded rod along the length direction. The matching groove is connected with a prism in a matching manner, and the prism is fixedly connected with the top end of the rotating shaft. The rotating shaft and the threaded rod are coaxially arranged, and a rotating disk is fixedly connected to the bottom end of the rotating shaft.

[0019] In this technical solution, the position adjusting part is used to adjust the distance between the movable plate and the joint, so as to increase the distance and facilitate the replacement of the gasket on the movable plate.

[0020] Preferably, it further includes a filling port of the refrigeration device; the filling port includes an interface pipe; a nut is threadedly connected to the interface pipe, and a sealing ring is arranged on the end face of the interface pipe.

[0021] Preferably, the filling port further includes a retaining ring; the outer ring of the retaining ring is fixedly connected to the inner wall of the filling port, a sealing plate is arranged behind the retaining ring, the sealing plate is connected with a third spring in a compressed state, one end of the third spring far away from the sealing plate is connected with an end seat, and the end seat is fixedly connected to the inner wall of the interface pipe; the diameter of the sealing plate is larger than the inner diameter of the retaining ring, and the diameter of the sealing plate is smaller than the outer diameter of the retaining ring.

[0022] In this technical solution, through the elastic force of the third spring, the sealing plate seals the retaining ring, thereby automatically closing the filling port.

[0023] Preferably, a push rod is fixedly installed inside the end head, and the push rod is L-shaped.

[0024] In this technical solution, after the end head is connected to the filling port, the sealing plate can be pushed through the push rod to open the filling port.

[0025] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0026] The positive and progressive effects of the present invention are as follows:

[0027] The above-mentioned refrigerant filling and discharging device for refrigeration equipment, during the filling process, is connected to the filling port of the refrigeration equipment through the end head, and the exhaust port can be opened through the opening and closing mechanism, and the refrigerant remaining in the refrigeration equipment is discharged through the filling port. The air in the end head, the straight pipe and the joint can be discharged from the exhaust port through the gas pressure of the refrigerant, so as to avoid the injection of air into the refrigeration equipment during subsequent filling. At the same time, the opening and closing operation of the exhaust port is convenient. When opening, it is only necessary to press the pull seat to separate the sealing gasket from the exhaust port. When closing again, it is only necessary to release the pressing seat and reset it through the elastic force of the elastic telescopic rod to make the sealing gasket re-seal the exhaust port. mouth; further, the opening and closing mechanism is provided with a position adjusting part for adjusting the distance between the movable plate and the joint, so that the sealing gasket is fitted with the bottom surface of the joint during normal use, and the sealing gasket is worn due to long-term use, and the distance between the movable plate and the joint can be increased to provide operating space for replacing the sealing gasket; further, a protective mechanism is provided at the end position for protection when the whole is not in use, so as to prevent external dust and foreign matter from entering the end, straight pipe and joint, thereby ensuring internal cleanliness, and thus preventing foreign matter and dust from entering the refrigeration equipment during filling. At the same time, when the protective mechanism is protecting the end, it applies pressure through the elastic pressurizing part to ensure the sealing effect of the end. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a schematic diagram of the structure of the handle, the opening and closing mechanism and the joint of the present invention.

[0030] Figure 3 It is a schematic structural diagram of the joint of the present invention.

[0031] Figure 4 It is a schematic diagram of the structure inside the handle of the present invention.

[0032] Figure 5 It is a schematic diagram of the structure inside the sleeve of the present invention.

[0033] Figure 6 It is a schematic diagram of the structure inside the threaded rod of the present invention.

[0034] Figure 7 This is a schematic diagram of the structure of the protective mechanism of the present invention when the end head is sealed.

[0035] Figure 8 It is a schematic structural diagram of the filling port of the present invention.

[0036] Figure 9 It is a schematic diagram of the structure of the present invention when the end head is connected to the filling port.

[0037] Description of Reference Numerals

[0038] 1. Refrigerant storage tank;

[0039] 2. Grip; 201. Slide groove; 202. Straight groove;

[0040] 3. Valve;

[0041] 4. Connector; 401. Internal thread; 402. Exhaust port;

[0042] 5. Straight pipe; 501. External thread;

[0043] 6. Pressure gauge;

[0044] 7. End head; 701. Push rod;

[0045] 8. Protection mechanism; 801. Fixed seat; 802. Square sleeve; 803. Link; 804. Protection cover; 805. First spring; 806. Rotating rod;

[0046] 9. Opening and closing mechanism; 901. Lever seat; 902. Movable plate; 903. Sealing gasket; 904. Guide bar; 905. Rotary disk; 906. Sleeve; 907. Threaded rod; 9071. Fitting groove; 908. Fixed nut; 909. Prism; 910. Rotating shaft; 911. Second spring;

[0047] 10. Filling port; 1001. Interface pipe; 1002. Nut; 1003. Sealing ring; 1004. Retaining ring; 1005. Sealing plate; 1006. Third spring; 1007. End seat. Detailed implementation manner

[0048] The present invention will be further described below by way of examples, but the present invention is not limited to the scope of the described examples.

[0049] As Figures 1-9 shown, a refrigerant filling and discharging device for a refrigeration device includes a refrigerant storage tank 1 and a grip 2 fixedly installed at the bottom of the refrigerant storage tank 1; further includes: a valve 3, one end of the valve 3 is connected to the tank opening of the refrigerant storage tank 1, and the other end of the valve 3 is connected to a connector 4; the connector 4 is connected to a straight pipe 5, a pressure gauge 6 is installed at the end of the straight pipe 5 away from the connector 4, and an end head 7 is installed at the end of the pressure gauge 6 away from the straight pipe 5; a protection mechanism 8, the protection mechanism 8 is arranged at the end head 7, and the protection mechanism 8 is provided with a movable protection cover 804; the protection cover 804 is connected with an elastic pressurizing part; an opening and closing mechanism 9, an exhaust port 402 is opened at the bottom of the connector 4, and the opening and closing mechanism 9 is arranged below the exhaust port 402.

[0050] In specific implementation, the grip 2 is used for single-handed holding by the user.

[0051] As Figure 7 and Figure 9 shown, the protection mechanism 8 includes a fixed seat 801; the fixed seat 801 is fixedly installed on the outer wall of the end 7, one end of the elastic pressing part is rotatably connected to the fixed seat 801, and the other end of the elastic pressing part is connected to the protection cover 804.

[0052] The elastic pressing part includes a square sleeve 802 and a connecting rod 803; a rotating rod 806 is fixedly connected to one end of the square sleeve 802, the rotating rod 806 is connected to the fixed seat 801, the connecting rod 803 is connected to the square sleeve 802 with a clearance fit, and a first spring 805 is arranged in the square sleeve 802. The connecting rod 803 is elastically connected to the square sleeve 802 through the first spring 805. One end of the connecting rod 803 is bent, and the bent end of the connecting rod 803 is fixedly connected to the protection cover 804.

[0053] The specific connection of the rotating rod 806 is as follows. The rotating rod 806 has a clearance fit with the circular hole opened on the fixed seat 801. A riveting head 4 is arranged at the end of the rotating rod 806 away from the square sleeve 802, which plays a role in preventing the rotating rod 806 from detaching from the fixed seat 801. Through the above settings, a rotational connection is formed.

[0054] As Figure 7 shown, the protection mechanism 8 shields and protects the end 7 to prevent dust and foreign objects from entering.

[0055] Before filling the refrigerant in the refrigeration equipment, the shielding of the end 7 is cancelled; the specific operation is as follows. By flipping and moving the protection cover 804, the protection cover 804, the connecting rod 803, and the square sleeve 802 rotate together through the rotating rod 806. After rotation, as Figure 9 shown, the protection cover 804 is separated from the end 7. Without the block of the end 7, the protection cover 804 is released. Through the tensile elastic force of the first spring 805, the connecting rod 803 drives the protection cover 804 to move to the state as Figure 9 shown.

[0056] After filling, when protecting the end 7, by pulling the protection cover 804, the connecting rod 803 moves together with the protection cover 804 to stretch the first spring 805. The connecting rod 803 slides with the square sleeve 802 but does not separate until the side surface of the protection cover 804 is flush with the end surface of the end 7. Then the protection cover 804 is flipped and rotated through the rotating rod 806 to make the protection cover 804 cover the end 7. Due to the block of the end 7, the first spring 805 remains in a stretched state. As Figure 7 shown, the tensile elastic force of the first spring 805 acts on the connecting rod 803 to press the protection cover 804 against the end surface of the end 7, ensuring the sealing effect.

[0057] AsFigure 2 As shown, an internal thread 401 is provided on the inner wall of the joint 4, and an external thread 501 is provided on the outer wall of one end of the straight pipe 5. The straight pipe 5 and the joint 4 are connected through the internal thread 401 and the external thread 501.

[0058] Through threaded connection, the straight pipe 5 and the joint 4 are detachable; when the straight pipe 5 and the joint 4 are connected, a seal can be provided between them to ensure the seal of the connection, such as using a rubber ring.

[0059] After the refrigerant in the refrigerant storage tank 1 is used up, the straight pipe 5 is detached from the joint 4, and the joint 4 is connected to an external container for storing refrigerant. By opening the valve 3, the external refrigerant is supplemented into the refrigerant storage tank 1 under the action of air pressure. After the supplementation is completed, the valve 3 is closed and detached from the external container for storing refrigerant.

[0060] Such as Figure 8 As shown, it also includes a filling port 10 of the refrigeration equipment; the filling port 10 includes an interface pipe 1001; a nut 1002 is threadedly connected to the interface pipe 1001, and a sealing ring 1003 is provided on the end face of the interface pipe 1001.

[0061] In normal circumstances of the filling port 10, the nut 1002 is installed on the filling port 10 for protection; when filling the filling port 10, the nut 1002 is unscrewed.

[0062] The filling port 10 further includes a retaining ring 1004; the outer ring of the retaining ring 1004 is fixedly connected to the inner wall of the filling port 10. A sealing plate 1005 is provided behind the retaining ring 1004. The sealing plate 1005 is connected to a third spring 1006 in a compressed state. One end of the third spring 1006 away from the sealing plate 1005 is connected to an end seat 1007, and the end seat 1007 is fixedly connected to the inner wall of the interface pipe 1001; the diameter of the sealing plate 1005 is larger than the inner diameter of the retaining ring 1004, and the diameter of the sealing plate 1005 is smaller than the outer diameter of the retaining ring 1004.

[0063] A push rod 701 is fixedly installed inside the end head 7, and the push rod 701 is L-shaped.

[0064] When the end head 7 is not connected to the filling port 10, as Figure 8 As shown, the sealing plate 1005 is pressed tightly against the retaining ring 1004 by the compressive elastic force of the third spring 1006 for automatic plugging.

[0065] After the end head 7 is connected to the filling port 10, as Figure 8 As shown, the sealing plate 1005 is pushed by the push rod 701, increasing the compression amount of the third spring 1006, and the sealing plate 1005 is separated from the retaining ring 1004, so that the filling port 10 is communicated with the end head 7.

[0066] When the end 7 is in a connected state with the filling port 10, manually apply pressure. Specifically, use the hand holding the grip 2 to press the end 7 against the filling port 10, and ensure sealing through the sealing ring 1003.

[0067] As Figures 2-5 As shown, the opening and closing mechanism 9 includes an adjustment part and an elastic telescopic rod. The elastic telescopic rod is slidably connected to a chute 201 opened on one side of the grip 2. One end of the elastic connecting rod is connected to the actuating seat 901. A movable plate 902 is fixedly connected to the top of the actuating seat 901. A sealing gasket 903 is arranged on the top surface of the movable plate 902, and the sealing gasket 903 is attached to the bottom of the exhaust port 402.

[0068] The elastic telescopic rod includes a sleeve 906, a guide bar 904, and a second spring 911; the second spring 911 is arranged inside the sleeve 906. The guide bar 904 is in clearance fit connection with the sleeve 906, and one end of the guide bar 904 is elastically connected to the inner wall of the sleeve 906 through the second spring 911. One end of the guide bar 904 is fixedly connected to the actuating seat 901.

[0069] Before the end 7 is connected to the filling port 10, open the exhaust port 402. Specifically, press the actuating seat 901 with the hand holding the grip 2. The actuating seat 901 drives the movable plate 902 and the guide bar 904 to move together. The guide bar 904 moves into the sleeve 906, compressing the second spring 911. The movable plate 902 drives the sealing gasket 903 to separate from the exhaust port 402, completing the opening of the exhaust port 402.

[0070] After that, the end 7 is connected to the filling port 10. The refrigerant remaining in the refrigeration equipment enters the end 7, the pressure gauge 6, the straight pipe 5, and the joint 4 in sequence through the filling port 10, and then is discharged from the exhaust port 402. During the above discharge process, the air in the above pipelines can be discharged together; after the discharge, release the actuating seat 901. Through the elastic force of the second spring 911, the movable plate 902 is reset, and the exhaust port 402 is blocked by the sealing gasket 903.

[0071] After completing the above discharge operation, open the valve 3. The high-pressure gas in the refrigerant storage tank 1 enters the filling port 10 in sequence through the valve 3, the joint 4, the straight pipe 5, the pressure gauge 6, and the end 7 to add refrigerant to the refrigeration equipment. Judge the filling situation by observing the pressure gauge 6. After filling, close the valve 3, separate the end 7 from the filling port 10, and the sealing disc 1005 reseals the retaining ring 1004. Then reinstall the nut 1002 onto the filling port 10.

[0072] As Figure 4 and Figure 6As shown, the position adjusting part includes a threaded rod 907; the top end of the threaded rod 907 is rotatably connected to the bottom of a sleeve 906. A straight groove 202 communicating with the bottom of a sliding groove 201 is formed at the bottom of the grip 2. A fixing nut 908 is fixedly installed at the top end of the straight groove 202, and a rotating shaft 910 is rotatably installed at the bottom end of the straight groove 202. The threaded rod 907 is in threaded connection with the fixing nut 908, and a fitting groove 9071 is formed in the middle of the threaded rod 907 along the length direction. A prism 909 is in fitting connection with the fitting groove 9071, and the prism 909 is fixedly connected to the top end of the rotating shaft 910. The rotating shaft 910 is coaxially arranged with the threaded rod 907, and a rotating disc 905 is fixedly connected to the bottom end of the rotating shaft 910.

[0073] After long-term use, the gasket 903 on the movable plate 902 wears out. When replacing it, by rotating the rotating disc 905 forward, the rotating shaft 910 and the prism 909 rotate together. The prism 909 drives the threaded rod 907 to rotate. The threaded rod 907 is screwed with the fixing nut 908. The threaded rod 907 drives the elastic telescopic rod, the lever seat 901, the movable plate 902 and the gasket 903 to move downward together. The above downward movement is guided by the sliding groove 201; so that there is enough distance between the gasket 903 and the lower part of the joint 4 to provide an operating space for replacing the gasket 903.

[0074] The gasket 903 can be fixed on the movable plate 902 by screws. By unscrewing the screws, the gasket 903 can be removed, and then the new gasket 903 can be installed on the movable plate 902 by screws.

[0075] After the gasket 903 is replaced, by rotating the rotating disc 905 in the reverse direction, the gasket 903 is made to fit the bottom surface of the joint 4 again.

[0076] The present invention is not limited to the above embodiments. No matter what changes are made in its shape or structure, they all fall within the protection scope of the present invention. The protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A refrigerant filling and discharging device for refrigeration equipment, comprising a refrigerant storage tank (1) and a handle (2) fixedly mounted to the bottom of the refrigerant storage tank (1); characterized in that: Also includes: A valve (3), one end of the valve (3) is connected to the tank opening of the refrigerant storage tank (1), and the other end of the valve (3) is connected to a connector (4); The joint (4) is connected to a straight pipe (5), a pressure gauge (6) is installed at one end of the straight pipe (5) away from the joint (4), and a terminal (7) is installed at one end of the pressure gauge (6) away from the straight pipe (5); A protective mechanism (8), wherein the protective mechanism (8) is arranged at the end (7), and the protective mechanism (8) is provided with a movable protective cover (804); the protective cover (804) is connected to an elastic pressure-applying portion; An opening and closing mechanism (9), wherein an exhaust port (402) is provided at the bottom of the joint (4), and the opening and closing mechanism (9) is arranged below the exhaust port (402).

2. A refrigerant charging and discharging device for refrigeration equipment according to claim 1, characterized in that: The protective mechanism (8) comprises a fixing seat (801); the fixing seat (801) is fixedly mounted on the outer wall of the end head (7); one end of the elastic pressure portion is rotatably connected to the fixing seat (801); and the other end of the elastic pressure portion is connected to the protective cover (804).

3. A refrigerant charging and discharging device for refrigeration equipment according to claim 2, characterized in that: The elastic pressure-applying portion comprises a square sleeve (802) and a connecting rod (803); one end of the square sleeve (802) is fixedly connected with a rotating rod (806), the rotating rod (806) is connected to the fixing seat (801), the connecting rod (803) is connected to the square sleeve (802) with a clearance fit, and a first spring (805) is arranged in the square sleeve (802), the connecting rod (803) and the square sleeve (802) are elastically connected via the first spring (805), one end of the connecting rod (803) is bent, and the bent end of the connecting rod (803) is fixedly connected to the protective cover (804).

4. A refrigerant charging and discharging device for refrigeration equipment according to claim 1, characterized in that: An internal thread (401) is provided on the inner wall of the joint (4), an external thread (501) is provided on the outer wall of one end of the straight pipe (5), and the straight pipe (5) and the joint (4) are connected via the internal thread (401) and the external thread (501).

5. The refrigerant charging and discharging device for refrigeration equipment according to claim 1, characterized in that: The opening and closing mechanism (9) comprises a positioning portion and an elastic telescopic rod, wherein the elastic telescopic rod is slidably connected to a slide groove (201) provided on one side of the handle (2), one end of the elastic connecting rod is connected to a pull seat (901), a movable plate (902) is fixedly connected to the top of the pull seat (901), a sealing gasket (903) is provided on the top surface of the movable plate (902), and the sealing gasket (903) is in contact with the bottom of the exhaust port (402).

6. A refrigerant charging and discharging device for refrigeration equipment according to claim 5, characterized in that: The elastic telescopic rod comprises a sleeve (906), a guide bar (904) and a second spring (911); the second spring (911) is arranged in the sleeve (906), the guide bar (904) and the sleeve (906) are connected with each other in a clearance fit, and one end of the guide bar (904) is elastically connected to the inner wall of the sleeve (906) through the second spring (911), and one end of the guide bar (904) is fixedly connected to the pull seat (901).

7. A refrigerant charging and discharging device for refrigeration equipment according to claim 6, characterized in that: The adjustment portion comprises a threaded rod (907); the top end of the threaded rod (907) is rotatably connected to the bottom of the sleeve (906); the bottom of the handle (2) is provided with a straight groove (202) which is connected to the bottom of the slide groove (201); a fixing nut (908) is fixedly installed at the top end of the straight groove (202); a rotating shaft (910) is rotatably installed at the bottom end of the straight groove (202); the threaded rod (907) is threadedly connected to the fixing nut (908); a matching groove (9071) is provided in the middle of the threaded rod (907) along the length direction; the matching groove (9071) is matched and connected with a prism (909); the prism (909) is fixedly connected to the top end of the rotating shaft (910); the rotating shaft (910) is coaxially arranged with the threaded rod (907); and the bottom end of the rotating shaft (910) is fixedly connected to a rotating disk (905).

8. The refrigerant charging and discharging device for refrigeration equipment according to claim 1, characterized in that: It also comprises a filling port (10) of the refrigeration equipment; the filling port (10) comprises an interface pipe (1001); a nut (1002) is threadedly connected to the interface pipe (1001), and a sealing ring (1003) is arranged on the end surface of the interface pipe (1001).

9. A refrigerant charging and discharging device for refrigeration equipment according to claim 8, characterized in that: The filling port (10) further comprises a retaining ring (1004); the outer ring of the retaining ring (1004) is fixedly connected to the inner wall of the filling port (10); a sealing disk (1005) is arranged behind the retaining ring (1004); the sealing disk (1005) is connected to a third spring (1006) in a compressed state; the end of the third spring (1006) away from the sealing disk (1005) is connected to an end seat (1007), and the end seat (1007) is fixedly connected to the inner wall of the interface pipe (1001); the diameter of the sealing disk (1005) is greater than the inner diameter of the retaining ring (1004), and the diameter of the sealing disk (1005) is smaller than the outer diameter of the retaining ring (1004).

10. The refrigerant charging and discharging device for refrigeration equipment according to claim 1, characterized in that: A push rod (701) is fixedly installed inside the end head (7), and the push rod (701) is L-shaped.

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