A refrigerant filling device suitable for automobile refrigeration system

Abstract

The present invention provides a refrigerant filling device suitable for automobile refrigeration systems, which relates to the technical field of refrigerant filling, and includes a storage mechanism and an auxiliary mechanism. The storage mechanism includes a storage box, and a fixed cover is provided on the top of the storage box. In the present invention, the gaseous refrigerant stored in the standby box in the auxiliary mechanism is used as a standby transmission, and the liquid refrigerant stored in the storage box is input into the storage box through a first pipe and a second pipe by a transmission pump when the pressure inside the storage box is reduced to a certain extent, thereby preventing the storage box from being damaged due to the low pressure inside the storage box. At the same time, the transmission pump can also prevent the transfer device from sucking in the liquid refrigerant inside the storage box. When the suction rate cannot be effectively controlled, and by adding the gaseous refrigerant, the liquid refrigerant can be prevented from merging with the air to reduce the purity of the liquid refrigerant.

Description

Technical Field

[0001] The invention relates to the technical field of refrigerant filling, and in particular to a refrigerant filling device suitable for an automobile refrigeration system. Background Art

[0002] In the prior art, for example, the device described in "A refrigerant filling device and method" of Chinese Patent No. CN111023412A includes: a refrigerant storage tank (1) for storing refrigerant; a first temperature sensor (2) for detecting the actual exhaust temperature of the compressor; a controller (3) for generating a control instruction according to the target exhaust temperature and the actual exhaust temperature; and a solenoid valve (4) for adding refrigerant to the air conditioning unit according to the control instruction, or stopping adding refrigerant to the air conditioning unit according to the control instruction. Automatically controlling the refrigerant filling according to the exhaust temperature can reduce the volume and weight of the filling device while ensuring the filling accuracy. However, although the device can fill better and more accurately during use, it is inevitable that air will be placed in the storage tank when the refrigeration storage tank is pressurized, which will cause the purity of the refrigerant to change, especially when the internal refrigerant in the storage tank is getting less and less, the purity will be lower. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings existing in the prior art. When the refrigeration storage tank is pressurized, air cannot be avoided from being placed inside the storage tank, which will cause the purity of the refrigerant to change, especially when the internal refrigerant in the storage tank becomes less and less, the purity will be lower.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a refrigerant filling device suitable for an automobile refrigeration system, comprising a storage mechanism and an auxiliary mechanism, the storage mechanism comprising a storage box, a fixed cover is arranged on the top of the storage box, a first pipeline is fixedly connected to the top of the fixed cover, a transmission pump is arranged at one end of the first pipeline, the output end of the transmission pump is fixedly connected to one end of the first pipeline, the input end of the transmission pump is fixedly connected to the second pipeline, a connecting pipe is fixedly connected to the top of the fixed cover, and the outer surfaces of the first pipeline, the second pipeline and the connecting pipe are all provided with a control valve, the auxiliary mechanism comprises a spare box, a cover plate is fixedly connected to the inner wall of the spare box, a fixed pipe is fixedly connected to the bottom of the cover plate, a spring is fixedly connected to the bottom end of the spring is fixedly connected to a support plate, a filter tube is fixedly connected to the top of the support plate, a fixed shell is arranged on the top of the cover plate, a vent pipe is fixedly connected to the top of the fixed shell, a manual valve is arranged on one side of the vent pipe, and one side of the fixed shell is fixedly connected to one end of the second pipeline.

[0005] As a preferred embodiment, the other end of the connecting pipe is fixedly connected to a switching device, a high-pressure needle and a low-pressure needle are arranged on the top of the switching device, and a discharge pipe and a suction pipe are fixedly connected to the bottom of the switching device.

[0006] As a preferred embodiment, a branch pipe is fixedly connected to the bottom of the fixed shell, the outer surface of the branch pipe is slidably connected to the inner wall of the filter tube, and the outer surface of the filter tube is slidably connected to the inner wall of the fixed tube.

[0007] As a preferred embodiment, a fixing ring is fixedly connected to the outer surface of the fixing shell, a swivel is slidably connected to the outer surface of the fixing shell, and an inner threaded tube is fixedly connected to the bottom of the swivel.

[0008] As a preferred implementation, the inner wall of the internally threaded tube is threadedly connected to the outer surface of the externally threaded tube, and the inner wall of the internally threaded tube is slidably connected to the outer surface of the fixing ring.

[0009] As a preferred implementation, a sealing tube is fixedly connected to the outer surface of the fixed shell, and the outer surface of the sealing tube is slidably connected to the inner wall of the external threaded tube.

[0010] As a preferred embodiment, a connecting ring is fixedly connected to the top of the storage box, a groove is formed on the top of the connecting ring, and a first sealing ring is fixedly connected to the inner wall of the groove.

[0011] As a preferred embodiment, the bottom of the fixed cover is fixedly connected to a mounting ring, the bottom of the mounting ring is fixedly connected to a second sealing ring, the outer surface of the second sealing ring is slidably connected to the inner wall of the groove, and the second sealing ring is fixedly connected to the first sealing ring by a plurality of bolts.

[0012] As a preferred embodiment, a pressure gauge is fixedly provided on the top of the fixed cover.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are:

[0014] 1. In the present invention, the gaseous refrigerant stored in the standby box in the auxiliary mechanism is used as a standby transmission, and the liquid refrigerant stored in the storage box, when the pressure inside the storage box is reduced to a certain level, the liquid refrigerant in the standby box is input into the storage box through the first pipe and the second pipe by the transmission pump, thereby preventing the storage box from being damaged due to the low pressure inside the storage box. At the same time, the transmission pump can also prevent the transfer device from sucking in the liquid refrigerant in the storage box. The suction rate cannot be effectively controlled, and the addition of the gaseous refrigerant can prevent the liquid refrigerant from merging with the air to reduce the purity of the liquid refrigerant.

[0015] 2. In the present invention, the fixing tube, spring, support plate, filter tube, external threaded tube, fixing shell, branch tube, swivel, internal threaded tube and fixing ring cooperate with each other. When the fixing shell is taken out, that is, the fixing shell, branch tube, swivel, internal threaded tube and fixing ring are taken out, the support plate can drive the filter tube to slide under the action of the spring, and the top of the support plate fits with the bottom end of the fixing tube. At the same time, the outer surface of the filter tube is attached to the inner wall of the fixing tube, thereby forming a certain sealing effect. The threaded tube and the fixed ring are matched. When the inner threaded tube is slidably sleeved on the outer surface of the outer threaded tube, the spring can be stretched through the branch tube, so that the filter holes of the filter tube are not attached to the inner wall of the fixed tube, and the gaseous refrigerant inside the spare box can enter the interior of the fixed shell through the through hole of the branch tube. The ventilation pipe is used for ventilation. When the spare box needs to be taken out after use, the manual valve needs to be opened to make the pressure inside the spare box almost the same as that of the outside world. Therefore, when the fixed shell is taken out, no resistance will be formed on the fixed shell by other forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a refrigerant filling device suitable for an automobile refrigeration system is provided for the present invention;

[0017] Figure 2 The present invention provides a structural stereogram of a storage mechanism of a refrigerant filling device suitable for an automobile refrigeration system;

[0018] Figure 3 The present invention provides a cross-sectional structural diagram of an auxiliary mechanism of a refrigerant charging device suitable for an automobile refrigeration system;

[0019] Figure 4 The present invention provides a three-dimensional cross-sectional structure diagram of the interior of a spare box of a refrigerant filling device suitable for an automobile refrigeration system;

[0020] Figure 5 The present invention provides a sectional exploded perspective view of a spare tank of a refrigerant filling device suitable for an automobile refrigeration system;

[0021] Figure 6 The present invention provides a three-dimensional diagram of the exploded structure of the interior of a spare box of a refrigerant filling device suitable for an automobile refrigeration system.

[0022] Legend:

[0023] 1. Storage mechanism; 2. Auxiliary mechanism; 3. Adapter; 4. High-pressure needle; 5. Low-pressure needle; 6. Discharge pipe; 7. Suction pipe; 8. Connecting pipe; 9. First pipeline; 10. Transmission pump; 11. Second pipeline;

[0024] 101. storage box; 102. connecting ring; 103. first sealing ring; 104. mounting ring; 105. second sealing ring; 106. fixing cover; 107. pressure gauge; 108. control valve;

[0025] 21. Spare box; 22. Cover plate; 23. Fixed pipe; 24. Spring; 25. Support plate; 26. Filter tube; 27. External threaded pipe; 28. Fixed shell; 29. ​​Branch pipe; 210. Sealing pipe; 211. Ventilation pipe; 212. Manual valve; 213. Swivel; 214. Internal threaded pipe; 215. Fixed ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figure 1-6 As shown, the present invention provides a technical solution: a refrigerant filling device suitable for an automobile refrigeration system, comprising a storage mechanism 1 and an auxiliary mechanism 2, the storage mechanism 1 comprising a storage box 101, a fixed cover 106 is arranged on the top of the storage box 101, a first pipeline 9 is fixedly connected to the top of the fixed cover 106, a transmission pump 10 is arranged at one end of the first pipeline 9, an output end of the transmission pump 10 is fixedly connected to one end of the first pipeline 9, an input end of the transmission pump 10 is fixedly connected to a second pipeline 11, a connecting pipe 8 is fixedly connected to the top of the fixed cover 106, and the first pipeline 9, the second pipeline 11 and the connecting pipe 8 are fixedly connected. The outer surface of the connecting pipe 8 is provided with a control valve 108, the auxiliary mechanism 2 includes a spare box 21, the inner wall of the spare box 21 is fixedly connected with a cover plate 22, the bottom of the cover plate 22 is fixedly connected with a fixed pipe 23, the bottom of the cover plate 22 is fixedly connected with a spring 24, the bottom end of the spring 24 is fixedly connected with a support plate 25, the top of the support plate 25 is fixedly connected with a filter tube 26, the top of the cover plate 22 is provided with a fixed shell 28, the top of the fixed shell 28 is fixedly connected with a ventilation pipe 211, a manual valve 212 is provided on one side of the ventilation pipe 211, and one side of the fixed shell 28 is fixedly connected with one end of the second pipeline 11;

[0029] Through the above embodiment, the gaseous refrigerant stored in the standby tank 21 in the auxiliary mechanism 2 is used as a standby transmission, and the liquid refrigerant stored in the storage tank 101 is transmitted through the first pipe 9 and the second pipe 11 through the transmission pump 10 when the pressure inside the storage tank 101 decreases to a certain extent, thereby preventing the storage tank 101 from being damaged due to the low pressure inside the storage tank 101. At the same time, the transmission pump 10 can also prevent the transfer device 3 from sucking the liquid refrigerant inside the storage tank 101. When the suction rate cannot be effectively controlled, and by adding the gaseous refrigerant, it can be prevented that the liquid refrigerant merges with the air to reduce the purity of the liquid refrigerant.

[0030] The other end of the connecting pipe 8 is fixedly connected with the adapter 3, the top of the adapter 3 is provided with a high-pressure needle 4 and a low-pressure needle 5, the bottom of the adapter 3 is fixedly connected with the discharge pipe 6 and the suction pipe 7, the bottom of the fixed shell 28 is fixedly connected with the branch pipe 29, the outer surface of the branch pipe 29 is slidably connected with the inner wall of the filter tube 26, and the outer surface of the filter tube 26 is slidably connected with the inner wall of the fixed tube 23;

[0031] Through the above embodiment, the multiple through holes opened on the branch pipe 29 are adapted to the filter holes on the filter tube 26, so that the gaseous refrigerant inside the standby box 21 can be effectively passed through the filter tube 26 and the branch pipe 29 into the interior of the fixed shell 28, which can provide better connectivity;

[0032] The outer surface of the fixed shell 28 is fixedly connected with a fixed ring 215, the outer surface of the fixed shell 28 is slidably connected with a rotating ring 213, the bottom of the rotating ring 213 is fixedly connected with an inner threaded tube 214, the inner wall of the inner threaded tube 214 is threadedly connected with the outer surface of the external threaded tube 27, the inner wall of the inner threaded tube 214 is slidably connected with the outer surface of the fixed ring 215, the outer surface of the fixed shell 28 is fixedly connected with a sealing tube 210, the outer surface of the sealing tube 210 is slidably connected with the inner wall of the external threaded tube 27;

[0033] Through the above embodiment, the rotating ring 213 is limited by the fixing ring 215, and the rotating ring 213 will be limited by the fixing ring 215 and the second pipe 11 when moving, so as to limit the fixing ring 215. At the same time, through the thread properties between the inner threaded tube 214 and the outer threaded tube 27, when the inner threaded tube 214 rotates on the outer surface of the outer threaded tube 27 and moves toward the spare box 21, the fixing ring 215 can be driven to move by the fixing ring 213, and then the fixing shell 28 can be driven to move, so that the branch pipe 29 can push the support plate 25 to move, and the movement of the support plate 25 can drive the filter tube 26 to move, and at this time, the fixing shell 28 can be fixed, and at the same time, through the cooperation of the branch pipe 29 and the filter tube 26, the gaseous refrigerant inside the spare box 21 can be used;

[0034] A connecting ring 102 is fixedly connected to the top of the storage box 101, a groove is opened on the top of the connecting ring 102, and a first sealing ring 103 is fixedly connected to the inner wall of the groove, a mounting ring 104 is fixedly connected to the bottom of the fixed cover 106, and a second sealing ring 105 is fixedly connected to the bottom of the mounting ring 104, the outer surface of the second sealing ring 105 is slidably connected to the inner wall of the groove, and the second sealing ring 105 is fixedly connected to the first sealing ring 103 by a plurality of bolts;

[0035] Through the above embodiment, the mounting ring 104 and the connecting ring 102 can be fixed by multiple bolts, and the first sealing ring 103 and the second sealing ring 105 can be sealed and fixed by the groove. When the second sealing ring 105 slides into the groove, the bolts give a squeezing force between the mounting ring 104 and the connecting ring 102, so that the first sealing ring 103 and the second sealing ring 105 can be tightly attached together, thereby achieving a sealing effect;

[0036] A barometer 107 is fixedly disposed on the top of the fixed cover 106;

[0037] Through the above embodiment, the pressure inside the storage box 101 can be better monitored by the barometer 107, and the gaseous refrigerant can be better transported;

[0038] In the above embodiment, the present invention comprises a fixed tube 23, a spring 24, a support plate 25, a filter tube 26, an external threaded tube 27, a fixed shell 28, a branch tube 29, a swivel 213, an internal threaded tube 214 and a fixed ring 215 that cooperate with each other. When the fixed shell 28 is taken out, that is, the fixed shell 28, the branch tube 29, the swivel 213, the internal threaded tube 214 and the fixed ring 215 are taken out, at this time, under the action of the spring 24, the support plate 25 can drive the filter tube 26 to slide, the top of the support plate 25 is in contact with the bottom end of the fixed tube 23, and the outer surface of the filter tube 26 is in contact with the inner wall of the fixed tube 23, thereby forming a certain sealing effect, and through the external threaded tube 27, the fixed shell 28, The branch pipe 29, the swivel 213, the inner threaded pipe 214 and the fixed ring 215 cooperate, and when the inner threaded pipe 214 is slidably sleeved on the outer surface of the outer threaded pipe 27, the spring 24 can be stretched through the branch pipe 29, so that the filter holes of the filter tube 26 are not attached to the inner wall of the fixed pipe 23, and the gaseous refrigerant inside the spare box 21 can enter the interior of the fixed shell 28 through the through hole of the branch pipe 29. The vent pipe 211 is used for ventilation. When the spare box 21 needs to be taken out after use, the manual valve 212 needs to be opened to make the pressure inside the spare box 21 almost the same as that outside, so that when the fixed shell 28 is taken out, no resistance is formed on the fixed shell 28 by other forces;

[0039] Working principle:

[0040] like Figure 1-6 As shown, during use, the transmission pump 10 is turned on, and the gaseous refrigerant inside the standby box 21 can be transported from the second pipe 11 and the first pipe 9 through the fixed shell 28 into the storage box 101 through the transmission pump 10. During use, the pressure gauge 107 is used to check whether the pressure inside the storage box 101 needs to be increased. When it needs to be increased, the control valve 108 on the first pipe 9 and the second pipe 11 is opened to put the first pipe 9 and the second pipe 11 in a ventilated state. At the same time, the standby box 21 is made of a deformable material, and a plastic material that does not react with the refrigerant can be used. At this time, the transmission pump 10 can transport the gaseous refrigerant inside the standby box 21 to the inside of the storage box 101, thereby completing the pressurization.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A refrigerant charging device suitable for an automobile refrigeration system, comprising a storage mechanism (1) and an auxiliary mechanism (2), characterized in that: The storage mechanism (1) comprises a storage box (101), a fixed cover (106) is provided on the top of the storage box (101), a first pipe (9) is fixedly connected to the top of the fixed cover (106), a transmission pump (10) is provided at one end of the first pipe (9), an output end of the transmission pump (10) is fixedly connected to one end of the first pipe (9), an input end of the transmission pump (10) is fixedly connected to a second pipe (11), a connecting pipe (8) is fixedly connected to the top of the fixed cover (106), and control valves (108) are provided on the outer surfaces of the first pipe (9), the second pipe (11) and the connecting pipe (8), and the auxiliary mechanism (2) comprises a spare box (21), the spare box ( The inner wall of the cover plate (21) is fixedly connected to a cover plate (22), the bottom of the cover plate (22) is fixedly connected to a fixed pipe (23), the bottom of the cover plate (22) is fixedly connected to a spring (24), the bottom end of the spring (24) is fixedly connected to a support plate (25), the top of the support plate (25) is fixedly connected to a filter tube (26), a fixed shell (28) is provided on the top of the cover plate (22), the top of the fixed shell (28) is fixedly connected to a ventilation pipe (211), one side of the ventilation pipe (211) is provided with a manual valve (212), one side of the fixed shell (28) is fixedly connected to one end of the second pipeline (11), the other end of the connecting pipe (8) is fixedly connected to a switching device (3), the switching device ( A high-pressure needle (4) and a low-pressure needle (5) are arranged on the top of the adapter (3); a discharge pipe (6) and a suction pipe (7) are fixedly connected at the bottom of the adapter (3); a branch pipe (29) is fixedly connected at the bottom of the fixed shell (28); the outer surface of the branch pipe (29) is slidably connected to the inner wall of the filter tube (26); the outer surface of the filter tube (26) is slidably connected to the inner wall of the fixed tube (23); a fixing ring (215) is fixedly connected to the outer surface of the fixed shell (28); a rotating ring (213) is slidably connected to the outer surface of the fixed shell (28); an inner threaded pipe (214) is fixedly connected to the bottom of the rotating ring (213); the inner wall of the inner threaded pipe (214) is threadedly connected to the outer surface of the outer threaded pipe (27); The inner wall of the internally-arranged threaded tube (214) is slidably connected to the outer surface of the fixed ring (215); the outer surface of the fixed shell (28) is fixedly connected to a sealing tube (210); the outer surface of the sealing tube (210) is slidably connected to the inner wall of the externally-arranged threaded tube (27); the top of the storage box (101) is fixedly connected to a connecting ring (102); a groove is provided on the top of the connecting ring (102); and a first sealing ring (103) is fixedly connected to the inner wall of the groove; the bottom of the fixed cover (106) is fixedly connected to a mounting ring (104); the bottom of the mounting ring (104) is fixedly connected to a second sealing ring (105); and the outer surface of the second sealing ring (105) is slidably connected to the inner wall of the groove.The second sealing ring (105) is fixedly connected to the first sealing ring (103) by a plurality of bolts.

2. A refrigerant filling device suitable for a vehicle refrigeration system according to claim 1, characterized in that: A pressure gauge (107) is fixedly arranged on the top of the fixed cover (106).

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