A refrigerant filling device for a horizontal spin-flow evaporator

Abstract

The application discloses a refrigerant filling device for horizontal cyclone evaporator, and belongs to the technical field of refrigerant filling, which comprises an injection mechanism for injecting external refrigerant into the evaporator, an extraction mechanism arranged on the injection mechanism and used for extracting original excess refrigerant in the evaporator, and a connecting mechanism used for connecting the injection mechanism with a refrigerant injection inlet; the refrigerant extraction and injection functions are integrated in a single gun body device, all processes can be controlled by switching the rotary knob, the operation steps are greatly simplified, and the maintenance efficiency is remarkably improved; the mechanical connecting mechanism based on gear transmission and worm and gear self-locking effect is adopted, after being inserted into the injection inlet, the rotary knob is indirectly driven to make four fixed plates perform synchronous and symmetrical radial movement, so that the fixed plates are firmly clamped on the outer wall of the refrigerant injection pipe of the evaporator, and stable and reliable connection between the filling device and the evaporator is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigerant filling, in particular to a refrigerant filling device for a horizontal rotary flow evaporator. BACKGROUND

[0002] As a key component in a refrigeration system, the performance of a horizontal rotary flow evaporator directly affects the efficiency and stability of the entire refrigeration cycle. During the installation and maintenance of refrigeration equipment, refrigerant filling and recovery is a basic and important operation. Traditional refrigerant filling methods usually rely on independent filling and recovery equipment, and the operation process is cumbersome, and there are problems such as low filling accuracy, easy leakage, and low work efficiency. The common refrigerant filling equipment on the market adopts a split structure, that is, the filling function and the recovery function are realized by different devices, which not only occupies a large space, but also needs to switch interfaces multiple times during operation, increasing the risk of refrigerant leakage and pollution. In addition, the traditional equipment usually adopts a manual fixing method when connecting the evaporator injection inlet, and the sealing performance and stability are poor, especially in a high-pressure environment, which is easy to loosen, affecting the operation safety. Although some high-automation-degree equipment has certain function integration capability, its structure is complex, the cost is high, and it has high requirements for the on-site operating environment, which is difficult to popularize and use in general maintenance occasions. Therefore, it is urgent to develop a refrigerant filling device with reasonable structure, simple operation and function integration, which can quickly and reliably connect with the evaporator injection inlet and complete the recovery of old refrigerant and the filling of new refrigerant in an integrated structure, thereby improving the maintenance efficiency and ensuring the stability and environmental protection of the system operation. SUMMARY

[0003] In view of the above technical problems, the technical scheme adopted by the present application is as follows: a refrigerant filling device for a horizontal rotary flow evaporator, comprising an injection mechanism for injecting external refrigerant into the evaporator, the injection mechanism comprising a gun body, an extraction mechanism for extracting the original excess refrigerant in the evaporator, and a connecting mechanism for connecting the injection mechanism with the refrigerant injection inlet, the extraction mechanism comprising a lower butt gear rotatably installed in the gun body, and a lower shell fixedly installed below the gun body.

[0004] The injection mechanism comprises a communication wheel rotatably installed in the gun body, a part gear fixedly installed on the communication wheel, two communication ports provided on the communication wheel, a slot rod rotatably installed in the gun body, a switching rod fixedly installed on the slot rod, a switching gear rotatably installed on the switching rod, and an output cavity provided in the gun body.

[0005] Further, the injection mechanism further comprises a motor fixedly installed on the gun body, an input gear is rotatably installed on the switching rod, the motor drives the input gear to rotate through gear transmission, the input gear drives the switching gear to rotate through transmission belt, a curved rod is rotatably installed in the gun body, a knob and an inner column are fixedly installed on the curved rod, a long slot is arranged on the slot rod, the inner column slides in the long slot of the slot rod, the curved rod drives the communication wheel to rotate through belt transmission, and a pressure gauge is fixedly installed on the gun body.

[0006] Further, a sending shell is fixedly installed on the gun body, a sending impeller is rotatably installed in the sending shell, and an upper butt gear is rotatably installed in the gun body.

[0007] Further, the knob is provided with three positions of injection, extraction and closing, when the knob is rotated to the injection position, the switching gear is engaged with the upper butt gear, the communication wheel communicates the sending shell with the output cavity through the communication port, when the knob is rotated to the extraction position, the switching gear is engaged with the lower butt gear, the communication wheel communicates the lower shell with the output cavity through the communication port, and when the knob is rotated to the closing position, the switching gear is not engaged with the lower butt gear and the upper butt gear, and the communication port of the communication wheel is not communicated with the output cavity, the lower shell and the sending shell.

[0008] In the initial state, the knob is in the closing position, the injection mechanism is first connected with the inlet of the evaporator through the connecting mechanism, the external refrigerant pipeline is connected with the sending shell, the original refrigerant in the evaporator needs to be emptied, and then new refrigerant is injected, when it is needed to switch from the extraction position to the injection position, the knob is continuously rotated clockwise, the curved rod is rotated, the inner column is eccentrically rotated, the slot rod and the switching rod are rotated through the sliding of the inner column in the long slot of the slot rod, the switching gear is disengaged from the lower butt gear, then the switching gear is engaged with the upper butt gear, the communication wheel is also rotated through the transmission belt when the curved rod is rotated, the output cavity and the sending shell are communicated through the communication wheel, the switch is pressed, the motor drives the input gear to rotate through gear transmission, the input gear drives the switching gear to rotate through the transmission belt, the switching gear drives the upper butt gear to rotate, the upper butt gear drives the sending impeller to rotate through the transmission belt, the refrigerant is sent from the sending shell to the output cavity through the communication wheel, and then injected into the evaporator.

[0009] Further, the extraction mechanism comprises a lower rotating rod rotatably installed on the lower shell, a lower wheel is fixedly installed on the lower rotating rod, the lower butt gear drives the lower wheel to rotate through the transmission belt, an extraction plug is slidably installed in the lower shell, a lifting frame is fixedly installed on the extraction plug, a lifting rod is fixedly installed on the lifting frame, and the lifting rod is rotatably installed with the lower rotating rod.

[0010] Further, the lower shell is fixedly installed with an upper through frame, the upper through frame is provided with an opening, the upper through frame is slidably installed with an upper one-way plug, the upper one-way plug and the upper through frame are provided with an upper spring, the lower shell is fixedly installed with a side through frame, the side through frame is slidably installed with a side one-way plug, and the side one-way plug and the side through frame are provided with a side spring.

[0011] First, the original refrigerant in the evaporator needs to be emptied, the knob is rotated clockwise, the knob drives the curved rod to rotate, the curved rod drives the inner column to rotate eccentrically, the inner column slides in the long groove of the groove rod, the groove rod and the switching rod are driven to rotate, the switching gear is engaged with the lower butt joint gear, when the curved rod rotates, the communication wheel is also driven to rotate through the transmission belt, the output cavity and the lower shell are communicated through the communication wheel, the switch is pressed, the motor drives the input gear to rotate through the gear transmission, the input gear drives the switching gear to rotate through the transmission belt, the switching gear drives the lower butt joint gear to rotate, the lower butt joint gear drives the lower wheel and the lower rotating rod to rotate through the transmission belt, so as to drive the lifting rod, the lifting frame and the extraction plug to lift, when the extraction plug is lowered, the upper one-way plug is pulled downward, the upper spring is compressed, the original refrigerant in the evaporator is extracted into the output cavity and then into the lower shell, at this time the side one-way plug does not move, when the extraction plug rises, at this time the upper one-way plug does not move, the side one-way plug is pushed to slide outward, the side spring is compressed, and the refrigerant in the lower shell is squeezed out through the discharge port.

[0012] Further, the connecting mechanism comprises an intermittent gear and a toothless gear rotatably installed in the gun body, the intermittent gear is engaged with a part of the gear, the intermittent gear drives the toothless gear to rotate through the transmission belt, the gun body is rotatably installed with a reverse gear and a forward gear, the forward gear is fixedly installed with a pinion, the pinion is engaged with the reverse gear, when the toothless gear is engaged with the pinion, the toothless gear is not engaged with the reverse gear, when the toothless gear is engaged with the reverse gear, the toothless gear is not engaged with the pinion, the gun body is rotatably installed with a worm, the worm is fixedly installed with a worm gear, and the forward gear drives the worm gear to rotate through gear transmission and belt transmission.

[0013] Further, the gun body is rotatably installed with an inner tooth disc, a front tooth disc and a rear tooth disc, the inner tooth disc is fixedly installed with a worm wheel, the worm wheel is engaged with the worm, the gun body is rotatably installed with a front gear, the inner tooth disc is engaged with the front gear, the front gear is fixedly installed with a center gear and a clamping gear, the clamping gear is engaged with the front tooth disc, the gun body is rotatably installed with an inner and outer gear and three planetary gears, the center gear is engaged with the planetary gears, the planetary gears are engaged with the inner and outer gear, and the inner and outer gear is engaged with the rear tooth disc.

[0014] Further, the gun body is fixedly installed with an insertion tube, the gun body is slidably installed with four fixed pieces, the fixed pieces are rotatably installed with a front rotating rod and a rear rotating rod, the front rotating rod is rotatably installed with the front tooth disc, and the rear rotating rod is rotatably installed with the rear tooth disc.

[0015] Firstly, the insertion tube is inserted into the evaporator refrigerant injection pipe, when the communication wheel rotates, the partial gear rotates, when the partial gear meshes with the intermittent gear, the intermittent gear drives the notched gear to rotate through the transmission belt, the notched gear drives the pinion and the forward gear to rotate, the forward gear drives the worm gear and the worm to rotate through the gear transmission and belt drive, the worm drives the worm wheel and the inner tooth disc to rotate, the inner tooth disc drives the front gear, the clamping gear and the inner and outer gear to rotate, the clamping gear drives the front tooth disc to rotate, the center gear drives the planetary gear to rotate, the planetary gear drives the inner and outer gear to rotate, the inner and outer gear drives the rear tooth disc to rotate, the rotation direction of the rear tooth disc is opposite to that of the front tooth disc, so that the four fixed pieces move inward through the front and rear rotating rods, and the refrigerant injection pipe of the evaporator is clamped by the four fixed pieces, when the clamping is completed, the partial gear and the intermittent gear are still in meshing, when the extraction or injection is completed, the knob is continuously rotated, the communication wheel and the partial gear continue to rotate, the notched gear and the pinion are disengaged, the notched gear and the reverse gear begin to mesh, the reverse gear rotates, the reverse gear drives the pinion and the forward gear to rotate, at this time, the direction of the pinion changes, so that the four fixed pieces move outward, so that the fixed pieces no longer clamp the evaporator refrigerant injection pipe, then the partial gear and the intermittent gear are disengaged, that is, the partial gear meshes with the intermittent gear once each time, the fixed pieces are retracted and expanded once, when the injection and extraction operation is performed, the fixed pieces clamp the evaporator refrigerant injection pipe, only when the extraction and injection are performed, the fixed pieces are in the clamping state.

[0016] Compared with the prior art, the present application has the following beneficial effects: (1) The present application integrates the functions of refrigerant extraction and injection into a single gun body device, and all processes can be controlled through a unique knob gear switching mechanism, so that the operator does not need to replace the device or frequently disassemble and connect the pipeline, and a single device can sequentially complete all the work of old refrigerant recovery and new refrigerant injection by a single person, greatly simplifying the operation steps, significantly improving the efficiency of maintenance and repair, and reducing the possibility of errors caused by complex operation; (2) The present application adopts a mechanical connection mechanism based on gear transmission and worm and worm self-locking effect, which can indirectly drive four fixed plates to perform synchronous and symmetrical radial motion by rotating the knob after inserting the injection port, so as to firmly clamp on the outer wall of the evaporator refrigerant injection pipe. This design ensures that a stable and reliable connection is formed between the injection device and the evaporator, which can effectively withstand the internal pressure during injection and extraction, preventing the refrigerant from leaking under high pressure, and greatly improving the safety and environmental protection of the operation process; (3) The upper one-way plug, side one-way plug and piston structure in the extraction mechanism of the present application can completely and efficiently discharge the original refrigerant in the evaporator and collect it to the lower shell and then push it out through the discharge port. This process avoids mixing of new and old refrigerants, ensures the purity of the newly injected refrigerant, and thus guarantees the efficient and stable operation of the horizontal cyclone evaporator and even the entire refrigeration system, prolonging the service life of the equipment; (4) All actions of the entire device, including clamping and loosening of the connection mechanism, switching of extraction and injection functions, and opening and closing of the flow channel, are realized by rotating the same knob and linking with the motor switch. The operator only needs to perform simple rotation and button operation to accurately control all functions, and the body structure is compact and has high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0018] Figure 2 It is a schematic diagram of the overall structure of the present application (internal).

[0019] Figure 3 It is a schematic diagram of the injection mechanism structure of the present application Figure 1 .

[0020] Figure 4 It is a schematic diagram of the injection mechanism structure of the present application Figure 2 .

[0021] Figure 5 It is a schematic diagram of the injection mechanism structure of the present application Figure 3 .

[0022] Figure 6 It is a schematic diagram of the injection mechanism structure of the present application Figure 4 .

[0023] Figure 7Extraction mechanism structure of the present application Figure 1 .

[0024] Figure 8 Extraction mechanism structure of the present application Figure 2 .

[0025] Figure 9 Extraction mechanism structure of the present application Figure 3 .

[0026] Figure 10 Connection mechanism structure of the present application Figure 1 .

[0027] Figure 11 Connection mechanism structure of the present application Figure 2 .

[0028] Figure 12 Connection mechanism structure of the present application Figure 3 .

[0029] Figure 13 For Figure 12 A local enlarged view of the part in the present application.

[0030] Reference signs: 101 - gun body; 102 - knob; 103 - motor; 104 - slot rod; 105 - switching rotating rod; 106 - switching gear; 107 - communication wheel; 108 - part gear; 109 - feeding impeller; 110 - feeding shell; 111 - upper butt joint gear; 112 - curved rod; 113 - pressure gauge; 114 - input gear; 115 - output cavity; 116 - inner column; 201 - lower shell; 202 - lower butt joint gear; 203 - lower wheel; 204 - lower rotating rod; 205 - lifting frame; 206 - extraction plug; 207 - upper one-way plug; 208 - upper spring; 209 - upper through frame; 210 - side one-way plug; 211 - side spring; 212 - side through frame; 213 - lifting rod; 301 - intermittent gear; 302 - missing tooth gear; 303 - reverse gear; 304 - pinion; 305 - forward gear; 306 - worm; 307 - inner tooth disc; 308 - worm wheel; 309 - front gear; 310 - center gear; 311 - inner and outer gear; 312 - planetary gear; 313 - rear tooth disc; 314 - front tooth disc; 315 - front rotating rod; 316 - rear rotating rod; 317 - fixed sheet; 318 - insertion tube; 319 - worm gear; 320 - clamping gear. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0032] Embodiment: refer to Figures 1-13A refrigerant charging device for a horizontal swirl evaporator includes an injection mechanism for injecting external refrigerant into the evaporator. The injection mechanism includes a gun body 101, an extraction mechanism for extracting excess refrigerant from the evaporator, and a connection mechanism for connecting the injection mechanism to the refrigerant injection port. The extraction mechanism includes a lower engagement gear 202 rotatably installed in the gun body 101, and a lower shell 201 is fixedly installed below the gun body 101.

[0033] The injection mechanism includes a connecting wheel 107 rotatably mounted inside the gun body 101, a portion of gears 108 fixedly mounted on the connecting wheel 107, two connecting ports on the connecting wheel 107, a slotted rod 104 rotatably mounted inside the gun body 101, a switching rod 105 fixedly mounted on the slotted rod 104, a switching gear 106 rotatably mounted on the switching rod 105, and an output chamber 115 inside the gun body 101.

[0034] like Figures 3-6 As shown, the injection mechanism also includes a motor 103 fixedly mounted on the gun body 101, an input gear 114 rotatably mounted on the switching lever 105, the motor 103 drives the input gear 114 to rotate through gear transmission, the input gear 114 drives the switching gear 106 to rotate through a transmission belt, a crank 112 rotatably mounted inside the gun body 101, a knob 102 and an inner column 116 fixedly mounted on the crank 112, a long groove provided on the grooved rod 104, the inner column 116 sliding in the long groove of the grooved rod 104, the crank 112 drives the connecting wheel 107 to rotate through belt transmission, and a pressure gauge 113 fixedly mounted on the gun body 101.

[0035] like Figures 3-6 As shown, a feed housing 110 is fixedly installed on the gun body 101, a feed impeller 109 is rotatably installed inside the feed housing 110, and an upper docking gear 111 is rotatably installed inside the gun body 101. The upper docking gear 111 drives the feed impeller 109 to rotate through a transmission belt.

[0036] like Figures 3-6 As shown, knob 102 has three positions: injection, extraction, and off. When knob 102 is turned to the injection position, switching gear 106 meshes with upper docking gear 111, and connecting wheel 107 connects the feed housing 110 and the output cavity 115 through the connecting port. When knob 102 is turned to the extraction position, switching gear 106 meshes with lower docking gear 202, and connecting wheel 107 connects the lower housing 201 and the output cavity 115 through the connecting port. When knob 102 is turned to the off position, switching gear 106 does not mesh with either lower docking gear 202 or upper docking gear 111, and the connecting port of connecting wheel 107 is not connected to the output cavity 115, the lower housing 201, or the feed housing 110.

[0037] In the initial state, the knob 102 is in the closed gear, first through the connecting mechanism with the injection mechanism and evaporator injection port connection, the external refrigerant pipeline and into the shell 110 connection, need to empty the original refrigerant in the evaporator, and then inject new refrigerant, when need to switch from the extraction gear to the injection gear, continue to rotate the knob 102 clockwise, the knob 102 drives the curved rod 112 to rotate, the curved rod 112 drives the inner column 116 to rotate eccentrically, through the sliding of the inner column 116 in the long groove of the groove rod 104, drives the groove rod 104 and the switching rod 105 to rotate, so that the switching gear 106 is disengaged from the lower butt joint gear 202, and then the switching gear 106 is engaged with the upper butt joint gear 111. When the curved rod 112 rotates, it will also drive the communication wheel 107 to rotate through the transmission belt, and the output cavity 115 and the feeding shell 110 are communicated through the communication wheel 107. Press the switch, the motor 103 drives the input gear 114 to rotate through the gear transmission, the input gear 114 drives the switching gear 106 to rotate through the transmission belt, the switching gear 106 drives the upper butt joint gear 111 to rotate, the upper butt joint gear 111 drives the feeding impeller 109 to rotate through the transmission belt, the refrigerant is sent from the feeding shell 110 to the output cavity 115 through the communication wheel 107, and then injected into the evaporator.

[0038] As shown in Figures 7-9 The extraction mechanism includes a lower rotating rod 204 rotatably installed on the lower shell 201, and a lower wheel 203 fixedly installed on the lower rotating rod 204. The lower butt joint gear 202 drives the lower wheel 203 to rotate through the transmission belt. The extraction plug 206 is slidably installed in the lower shell 201, the lifting frame 205 is fixedly installed on the extraction plug 206, the lifting rod 213 is fixedly installed on the lifting frame 205, and the lifting rod 213 is rotatably installed with the lower rotating rod 204.

[0039] As shown in Figures 7-9 The upper through frame 209 is fixedly installed in the lower shell 201, and the upper through frame 209 is provided with an opening. The upper one-way plug 207 is slidably installed on the upper through frame 209, and the upper spring 208 is arranged between the upper one-way plug 207 and the upper through frame 209. The side through frame 212 is fixedly installed in the lower shell 201, and the side one-way plug 210 is slidably installed on the side through frame 212. The side spring 211 is arranged between the side one-way plug 210 and the side through frame 212.

[0040] First need to evaporator original refrigerant is emptied, clockwise rotate knob 102, knob 102 drive crank 112 rotation, crank 112 drive inner column 116 eccentric rotation, through the inner column 116 in the slot bar 104 long slot sliding, drive slot bar 104 and switching rod 105 rotation, so that the switching gear 106 and the lower interface gear 202 meshing, crank 112 rotation will also simultaneously through the transmission belt drive communication wheel 107 rotation, through the communication wheel 107 will output cavity 115 and lower shell 201 communication, press the switch, motor 103 through the gear transmission drive input gear 114 rotation, input gear 114 through the transmission belt drive switching gear 106 rotation, switching gear 106 drive lower interface gear 202 rotation, lower interface gear 202 through the transmission belt drive lower wheel 203 and lower rod 204 rotation, thus drive lifting rod 213, lifting frame 205 and pull out plug 206 lifting, when pull out plug 206 down, the upper one-way plug 207 down, the upper spring 208 is compressed, the original refrigerant in the evaporator is extracted into the output cavity 115 and then into the lower shell 201, when the side one-way plug 210 does not move, when pull out plug 206 up, the upper one-way plug 207 does not move, push the side one-way plug 210 slide outwards, the side spring 211 is compressed, the refrigerant in the lower shell 201 is extruded through the outlet.

[0041] As Figures 10-13 shown, the connecting mechanism includes intermittent gear 301 and missing tooth gear 302 rotationally installed in the gun body 101, intermittent gear 301 with part gear 108 meshing, intermittent gear 301 through the transmission belt drive missing tooth gear 302 rotation, gun body 101 rotationally installed with reverse gear 303 and positive gear 305, positive gear 305 fixedly installed with pinion 304, pinion 304 with reverse gear 303 meshing, missing tooth gear 302 and pinion 304 meshing, missing tooth gear 302 and reverse gear 303 not meshing, missing tooth gear 302 and reverse gear 303 meshing, gun body 101 rotationally installed with worm 306, worm 306 fixedly installed with worm gear 319, positive gear 305 through gear transmission and belt drive drive worm gear 319 rotation.

[0042] As Figures 10-13As shown, an internal gear disk 307, a front gear disk 314, and a rear gear disk 313 are rotatably mounted inside the gun body 101. A worm gear 308 is fixedly mounted on the internal gear disk 307, and the worm gear 308 meshes with a worm 306. A front gear 309 is rotatably mounted inside the gun body 101, and the internal gear disk 307 meshes with the front gear 309. A center gear 310 and a clamping gear 320 are fixedly mounted on the front gear 309, and the clamping gear 320 meshes with the front gear disk 314. An internal and external gear 311 and three planetary gears 312 are rotatably mounted on the gun body 101. The center gear 310 meshes with the planetary gears 312, the planetary gears 312 mesh with the internal and external gears 311, and the internal and external gears 311 mesh with the rear gear disk 313.

[0043] like Figures 10-13 As shown, an insertion tube 318 is fixedly installed on the gun body 101, and four fixing plates 317 are slidably installed on the gun body 101. A front rotating rod 315 and a rear rotating rod 316 are rotatably installed on the fixing plates 317. The front rotating rod 315 is rotatably installed with the front gear plate 314, and the rear rotating rod 316 is rotatably installed with the rear gear plate 313.

[0044] Firstly, the insertion tube 318 is inserted into the evaporator refrigerant injection tube. When the communication wheel 107 rotates, the partial gear 108 rotates together. When the partial gear 108 meshes with the intermittent gear 301, the partial gear 108 drives the intermittent gear 301 to rotate. The intermittent gear 301 drives the notched gear 302 to rotate through the transmission belt. The notched gear 302 drives the pinion 304 and the forward gear 305 to rotate. The forward gear 305 drives the worm gear 319 and the worm 306 to rotate through the gear transmission and belt transmission. The worm 306 drives the worm wheel 308 and the inner tooth disc 307 to rotate. The inner tooth disc 307 drives the front gear 309, the clamping gear 320 and the inner-outer gear 311 to rotate. The clamping gear 320 drives the front tooth disc 314 to rotate. The central gear 310 drives the planetary gear 312 to rotate. The planetary gear 312 drives the inner-outer gear 311 to rotate. The inner-outer gear 311 drives the rear tooth disc 313 to rotate. The rotation direction of the rear tooth disc 313 is opposite to that of the front tooth disc 314. Thus, the four fixed pieces 317 are driven to move inward through the front and rear rotating rods 315 and 316. The refrigerant injection tube wall of the evaporator is clamped by the four fixed pieces 317. When the clamping is completed, the partial gear 108 still meshes with the intermittent gear 301. When the operation of taking out or injecting is completed, the knob 102 is continuously rotated. The communication wheel 107 and the partial gear 108 continue to rotate. The notched gear 302 disengages from the pinion 304. The notched gear 302 starts to mesh with the reverse gear 303, which drives the reverse gear 303 to rotate. The reverse gear 303 drives the pinion 304 and the forward gear 305 to rotate. At this time, the rotation direction of the pinion 304 is changed, thereby driving the four fixed pieces 317 to move outward. The fixed pieces 317 no longer clamp the evaporator refrigerant injection tube. Subsequently, the partial gear 108 disengages from the intermittent gear 301. That is, the partial gear 108 meshes with the intermittent gear 301 once each time. The fixed pieces 317 move inward and outward once. When the operation of injecting and taking out is performed, the fixed pieces 317 clamp the evaporator refrigerant injection tube. Only when the operation of taking out and injecting is performed, the fixed pieces 317 are in the clamping state.

[0045] The working principle of the refrigerant filling equipment for the horizontal cyclone evaporator is as follows: firstly, the insertion pipe 318 is inserted into the evaporator refrigerant filling pipe; in the initial state, the knob 102 is in the closed gear position; firstly, the original refrigerant in the evaporator needs to be emptied; the knob 102 is rotated clockwise, the curved rod 112 is rotated, the inner column 116 is eccentrically rotated, the inner column 116 slides in the long groove of the groove rod 104, the groove rod 104 and the switching rod 105 are rotated, the switching gear 106 is meshed with the lower butt joint gear 202, the curved rod 112 is rotated, the communication wheel 107 is rotated through the transmission belt, the output cavity 115 and the lower shell 201 are communicated through the communication wheel 107, when the communication wheel 107 is rotated, the part gear 108 is rotated together, when the part gear 108 is meshed with the intermittent gear 301, the part gear 108 drives the intermittent gear 301 to rotate, the intermittent gear 301 drives the gear tooth wheel 302 to rotate through the transmission belt, the gear tooth wheel 302 drives the pinion 304 and the forward gear 305 to rotate, the forward gear 305 drives the worm gear 319 and the worm 306 to rotate through gear transmission and belt transmission, the worm 306 drives the worm wheel 308 and the inner tooth disc 307 to rotate, the inner tooth disc 307 drives the front gear 309, the clamping gear 320 and the inner and outer gear 311 to rotate, the clamping gear 320 drives the front tooth disc 314 to rotate, the center gear 310 drives the planetary gear 312 to rotate, the planetary gear 312 drives the inner and outer gear 311 to rotate, the inner and outer gear 311 drives the rear tooth disc 313 to rotate, the rotation direction of the rear tooth disc 313 is opposite to that of the front tooth disc 314, so that the four fixed sheets 317 are driven to move inward through the front rotating rod 315 and the rear rotating rod 316, the refrigerant filling pipe of the evaporator is clamped through the four fixed sheets 317, when the clamping is completed, the part gear 108 is still meshed with the intermittent gear 301, when the taking or filling is completed, the knob 102 is continuously rotated, the communication wheel 107 and the part gear 108 are continuously rotated, the gear tooth wheel 302 is disengaged from the pinion 304, the gear tooth wheel 302 starts to mesh with the reverse gear 303, drives the reverse gear 303 to rotate, the reverse gear 303 drives the pinion 304 and the forward gear 305 to rotate, at this time, the rotation direction of the pinion 304 is changed, so that the four fixed sheets 317 move outward, so that the fixed sheets 317 no longer clamp the evaporator refrigerant filling pipe, then the part gear 108 is disengaged from the intermittent gear 301, that is, the part gear 108 is meshed with the intermittent gear 301 once each time, the fixed sheets 317 are retracted and expanded once, when the filling and taking operation is performed, the fixed sheets 317 clamp the evaporator refrigerant filling pipe.When the switch is pressed, the motor 103 drives the input gear 114 to rotate through gear transmission, the input gear 114 drives the switching gear 106 to rotate through transmission belt, the switching gear 106 drives the lower docking gear 202 to rotate, the lower docking gear 202 drives the lower wheel 203 and the lower rotating rod 204 to rotate through transmission belt, thereby driving the lifting rod 213, the lifting frame 205 and the extraction plug 206 to lift, when the extraction plug 206 is lowered, the upper one-way plug 207 is extracted downward, the upper spring 208 is compressed, the original refrigerant in the evaporator is extracted into the output cavity 115 and then into the lower shell 201, at this time the side one-way plug 210 does not move, when the extraction plug 206 is lifted, the upper one-way plug 207 does not move at this time, the side one-way plug 210 is pushed to slide outward, the side spring 211 is compressed, the refrigerant in the lower shell 201 is extruded through the discharge port. When it is needed to switch from the extraction gear to the injection gear, the knob 102 is continuously rotated clockwise, the knob 102 drives the curved rod 112 to rotate, the curved rod 112 drives the inner column 116 to rotate eccentrically, through the sliding of the inner column 116 in the long groove of the groove rod 104, the groove rod 104 and the switching rotating rod 105 are driven to rotate, so that the switching gear 106 is disengaged from the lower docking gear 202, then the switching gear 106 is engaged with the upper docking gear 111, when the curved rod 112 rotates, the communication wheel 107 is also driven to rotate through transmission belt, the output cavity 115 and the feeding shell 110 are communicated through the communication wheel 107, when the switch is pressed, the motor 103 drives the input gear 114 to rotate through gear transmission, the input gear 114 drives the switching gear 106 to rotate through transmission belt, the switching gear 106 drives the upper docking gear 111 to rotate, the upper docking gear 111 drives the feeding impeller 109 to rotate through transmission belt, the refrigerant is sent from the feeding shell 110 to the output cavity 115 through the communication wheel 107, and then injected into the evaporator.

[0046] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent substitutions or changes according to the technical scheme and the inventive concept of the present application within the technical scope of the present application, which should be covered in the protection scope of the present application.

Claims

1. A refrigerant filling device for a horizontal spin-flow evaporator comprising an injection mechanism for injecting external refrigerant into the evaporator, characterized by: The injection mechanism comprises a gun body (101), and an extraction mechanism for extracting original excess refrigerant in the evaporator and a connecting mechanism for connecting the injection mechanism with a refrigerant injection inlet are arranged on the injection mechanism, the extraction mechanism comprises a lower butt gear (202) rotatably arranged in the gun body (101), and a lower shell (201) is fixedly arranged below the gun body (101); The injection mechanism comprises a communication wheel (107) rotatably arranged in the gun body (101), and a part gear (108) is fixedly arranged on the communication wheel (107), two communication ports are arranged on the communication wheel (107), a slot lever (104) is rotatably arranged in the gun body (101), a switching lever (105) is fixedly arranged on the slot lever (104), a switching gear (106) is rotatably arranged on the switching lever (105), and an output cavity (115) is arranged in the gun body (101); The injection mechanism further comprises a motor (103) fixedly arranged on the gun body (101), an input gear (114) is rotatably arranged on the switching lever (105), the motor (103) drives the input gear (114) to rotate through gear transmission, the input gear (114) drives the switching gear (106) to rotate through a transmission belt, a crank lever (112) is rotatably arranged in the gun body (101), a knob (102) and an inner column (116) are fixedly arranged on the crank lever (112), a long slot is arranged on the slot lever (104), the inner column (116) slides in the long slot of the slot lever (104), the crank lever (112) drives the communication wheel (107) to rotate through belt transmission, and a pressure gauge (113) is fixedly arranged on the gun body (101); The gun body (101) is fixedly provided with a feeding shell (110), and a feeding impeller (109) is rotatably arranged in the feeding shell (110), and an upper butt gear (111) is rotatably arranged in the gun body (101) and drives the feeding impeller (109) to rotate through a transmission belt; The knob (102) is provided with three positions of injection, extraction and closing, when the knob (102) is rotated to the injection position, the switching gear (106) is engaged with the upper butt gear (111), the communication wheel (107) communicates the feeding shell (110) with the output cavity (115) through the communication port, when the knob (102) is rotated to the extraction position, the switching gear (106) is engaged with the lower butt gear (202), the communication wheel (107) communicates the lower shell (201) with the output cavity (115) through the communication port, and when the knob (102) is rotated to the closing position, the switching gear (106) is not engaged with the lower butt gear (202) and the upper butt gear (111), and the communication port of the communication wheel (107) is not communicated with the output cavity (115), the lower shell (201) and the feeding shell (110).

2. A horizontal spinning flow evaporator refrigerant charging apparatus according to claim 1, characterized by: The extraction mechanism comprises a lower rotating rod (204) rotatably installed on the lower shell (201), a lower wheel (203) fixedly installed on the lower rotating rod (204), and a lower butt joint gear (202) driving the lower wheel (203) to rotate through a transmission belt.

3. A horizontal spinning flow evaporator refrigerant charging apparatus according to claim 2, characterized by: The lower shell (201) is fixedly installed with an upper through frame (209) provided with an opening, the upper through frame (209) is slidably installed with an upper one-way plug (207), and the upper one-way plug (207) and the upper through frame (209) are provided with an upper spring (208) therebetween.

4. A horizontal spinning flow evaporator refrigerant charging apparatus according to claim 1, characterized by: The connecting mechanism comprises an intermittent gear (301) and a tooth-lacking gear (302) rotatably installed in the gun body (101), the intermittent gear (301) is engaged with the partial gear (108), the intermittent gear (301) drives the tooth-lacking gear (302) to rotate through a transmission belt, the gun body (101) is rotatably installed with a reverse gear (303) and a forward gear (305), the forward gear (305) is fixedly installed with a pinion (304), the pinion (304) is engaged with the reverse gear (303), when the tooth-lacking gear (302) is engaged with the pinion (304), the tooth-lacking gear (302) is not engaged with the reverse gear (303), when the tooth-lacking gear (302) is engaged with the reverse gear (303), the tooth-lacking gear (302) is not engaged with the pinion (304), and the gun body (101) is rotatably installed with a worm (306) fixedly installed with a worm gear (319), the forward gear (305) drives the worm gear (319) to rotate through gear transmission and belt transmission.

5. A horizontal spinning flow evaporator refrigerant charging apparatus according to claim 4, characterized by: The gun body (101) is rotatably installed with an inner tooth disc (307), a front tooth disc (314) and a rear tooth disc (313), the inner tooth disc (307) is fixedly installed with a worm wheel (308) engaged with the worm (306), the gun body (101) is rotatably installed with a front gear (309) engaged with the inner tooth disc (307), the front gear (309) is fixedly installed with a center gear (310) and a clamping gear (320), the clamping gear (320) is engaged with the front tooth disc (314), the gun body (101) is rotatably installed with an inner and outer gear (311) and three planetary gears (312), the center gear (310) is engaged with the planetary gears (312), the planetary gears (312) are engaged with the inner and outer gear (311), and the inner and outer gear (311) is engaged with the rear tooth disc (313).

6. A horizontal spinning flow evaporator refrigerant filling apparatus according to claim 5, characterized in that: The gun body (101) is fixedly provided with an insertion pipe (318), and four fixed sheets (317) are slidably arranged on the gun body (101); the front fixed sheet (317) is rotatably provided with a front rotating rod (315) and a rear rotating rod (316); the front rotating rod (315) is rotatably provided with a front toothed disc (314); and the rear rotating rod (316) is rotatably provided with a rear toothed disc (313).

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