Refrigerant filling equipment for horizontal rotational flow evaporator

Abstract

The invention discloses refrigerant filling equipment for a horizontal rotational flow evaporator, which belongs to the technical field of refrigerant filling and comprises an injection mechanism for injecting an external refrigerant into the evaporator. The injection mechanism is provided with a pumping mechanism used for pumping out original redundant refrigerants in the evaporator and a connecting mechanism used for connecting the injection mechanism with the refrigerant injection opening. The pumping and injecting functions of the refrigerant are integrated in single gun body equipment, and the whole process can be controlled by switching the gear of the knob, so that the operation steps are greatly simplified, and the repair and maintenance efficiency is remarkably improved; a mechanical connecting mechanism based on gear transmission and a worm and gear self-locking effect is adopted, after the four fixing pieces are inserted into an injection opening, the four fixing pieces are indirectly driven to execute synchronous and symmetrical radial movement through rotation of the rotary knob, and therefore the four fixing pieces are firmly clamped on the outer wall of an evaporator refrigerant injection pipe; and stable and reliable connection between the filling equipment and the evaporator is ensured.

Description

Technical Field

[0001] This invention relates to the field of refrigerant charging technology, and in particular to a refrigerant charging device for a horizontal vortex evaporator. Background Technology

[0002] As a key component in refrigeration systems, the performance of horizontal cyclone evaporators directly affects the efficiency and stability of the entire refrigeration cycle. Refrigerant charging and recovery are fundamental and crucial operations during the installation and maintenance of refrigeration equipment. Traditional refrigerant charging methods typically rely on separate charging and recovery equipment, resulting in cumbersome procedures and problems such as low charging accuracy, susceptibility to leaks, and low efficiency. Currently, most refrigerant charging equipment on the market adopts a split structure, where charging and recovery functions are performed by different devices. This not only occupies a large space but also requires multiple interface switching during operation, increasing the risk of refrigerant leaks and contamination. Furthermore, traditional equipment often uses manual fixing when connecting to the evaporator inlet, resulting in poor sealing and stability, especially prone to loosening under high pressure, affecting operational safety. While some highly automated equipment possesses certain functional integration capabilities, its complex structure, high cost, and stringent on-site operating environment requirements make it difficult to promote its use in general maintenance settings. Therefore, there is an urgent need to develop a refrigerant charging device with a reasonable structure, simple operation, and integrated functions, which can quickly and reliably connect to the evaporator inlet and complete the functions of old refrigerant recovery and new refrigerant charging in an integrated structure, thereby improving maintenance efficiency and ensuring the stability and environmental friendliness of system operation. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention adopts the following technical solution: a refrigerant charging device for a horizontal vortex evaporator, comprising an injection mechanism for injecting external refrigerant into the evaporator, the injection mechanism comprising a gun body, an extraction mechanism for extracting excess refrigerant from the evaporator and a connecting mechanism for connecting the injection mechanism to the refrigerant injection port, the extraction mechanism comprising a lower engagement gear rotatably mounted in the gun body, and a lower shell fixedly mounted below the gun body; The injection mechanism includes a connecting wheel rotatably mounted inside the gun body, a portion of gears fixedly mounted on the connecting wheel, two connecting ports on the connecting wheel, a slotted rod rotatably mounted inside the gun body, a switching rod fixedly mounted on the slotted rod, a switching gear rotatably mounted on the switching rod, and an output chamber inside the gun body.

[0004] Furthermore, the injection mechanism also includes a motor fixedly mounted on the gun body, an input gear rotatably mounted on the switching rod, the motor driving the input gear to rotate via gear transmission, the input gear driving the switching gear to rotate via a transmission belt, a crank rod rotatably mounted inside the gun body, a knob and an inner column fixedly mounted on the crank rod, a long groove provided on the groove rod, the inner column sliding within the long groove of the groove rod, the crank rod driving the connecting wheel to rotate via belt transmission, and a pressure gauge fixedly mounted on the gun body.

[0005] Furthermore, a feed housing is fixedly installed on the gun body, a feed impeller is rotatably installed inside the feed housing, and an upper docking gear is rotatably installed inside the gun body. The upper docking gear drives the feed impeller to rotate through a transmission belt.

[0006] Furthermore, the knob has three positions: injection, extraction, and off. When the knob is turned to the injection position, the switching gear meshes with the upper docking gear, and the connecting wheel connects the feed housing and the output cavity through the connecting port. When the knob is turned to the extraction position, the switching gear meshes with the lower docking gear, and the connecting wheel connects the lower housing and the output cavity through the connecting port. When the knob is turned to the off position, the switching gear does not mesh with either the lower or upper docking gear, and the connecting port of the connecting wheel is not connected to the output cavity, the lower housing, or the feed housing.

[0007] Initially, the knob is in the off position. First, the injection mechanism is connected to the evaporator injection port via the connecting mechanism, and the external refrigerant pipe is connected to the inlet shell. The existing refrigerant in the evaporator needs to be emptied before new refrigerant is injected. When switching from the extraction position to the injection position, continue to turn the knob clockwise. The knob drives the crank to rotate, which in turn drives the inner column to rotate eccentrically. Through the sliding of the inner column in the long slot of the slotted rod, the slotted rod and the switching rod rotate, causing the switching gear to disengage from the lower docking gear. Then, the switching gear engages with the upper docking gear. When the crank rotates, it also drives the connecting wheel to rotate via the transmission belt. The connecting wheel connects the output chamber and the inlet shell. Pressing the switch, the motor drives the input gear to rotate via gear transmission. The input gear drives the switching gear to rotate via the transmission belt. The switching gear drives the upper docking gear to rotate, and the upper docking gear drives the inlet impeller to rotate via the transmission belt. The refrigerant is sent from the inlet shell through the connecting wheel to the output chamber and then injected into the evaporator.

[0008] Furthermore, the extraction mechanism includes a lower rotating rod rotatably mounted on the lower shell, a lower wheel fixedly mounted on the lower rotating rod, a lower mating gear driving the lower wheel to rotate via a transmission belt, an extraction plug slidably mounted inside the lower shell, a lifting frame fixedly mounted on the extraction plug, a lifting rod fixedly mounted on the lifting frame, and the lifting rod rotatably mounted with the lower rotating rod.

[0009] Furthermore, an upper through frame is fixedly installed inside the lower shell, an opening is provided on the upper through frame, an upper one-way plug is slidably installed on the upper through frame, and an upper spring is provided between the upper one-way plug and the upper through frame. A side through frame is fixedly installed inside the lower shell, a side one-way plug is slidably installed on the side through frame, and a side spring is provided between the side one-way plug and the side through frame.

[0010] First, the existing refrigerant in the evaporator needs to be emptied. Turn the knob clockwise, which drives the crank to rotate. The crank drives the inner column to rotate eccentrically. Through the sliding of the inner column in the long slot of the slotted rod, the slotted rod and the switching rod rotate, so that the switching gear meshes with the lower docking gear. When the crank rotates, it also drives the connecting wheel to rotate through the transmission belt. The connecting wheel connects the output chamber and the lower shell. Press the switch, and 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 docking gear to rotate. The lower docking gear drives the lower wheel and the lower rotating rod to rotate through the transmission belt, thereby driving the lifting rod, lifting frame and extraction plug to rise and fall. When the extraction plug falls, it pulls the upper one-way plug downward, and the upper spring is compressed, drawing the existing refrigerant in the evaporator into the output chamber and then into the lower shell. At this time, the side one-way plug does not move. When the extraction plug rises, the upper one-way plug does not move, pushing the side one-way plug to slide outward, and the side spring is compressed, squeezing the refrigerant in the lower shell out through the discharge port.

[0011] Furthermore, the connecting mechanism includes an intermittent gear and a toothed gear rotatably mounted inside the gun body. The intermittent gear meshes with a partial gear, and the intermittent gear drives the toothed gear to rotate via a transmission belt. A reverse gear and a forward gear are rotatably mounted inside the gun body. A pinion is fixedly mounted on the forward gear, and the pinion meshes with the reverse gear. When the toothed gear meshes with the pinion, the toothed gear does not mesh with the reverse gear. When the toothed gear meshes with the reverse gear, the toothed gear does not mesh with the pinion. A worm is rotatably mounted inside the gun body, and a worm gear is fixedly mounted on the worm. The forward gear drives the worm gear to rotate via gear transmission and belt transmission.

[0012] Furthermore, an internal gear disk, a front gear disk, and a rear gear disk are rotatably mounted inside the gun body. A worm gear is fixedly mounted on the internal gear disk and meshes with a worm. A front gear is rotatably mounted inside the gun body, and the internal gear disk meshes with the front gear. A central gear and a clamping gear are fixedly mounted on the front gear and mesh with the front gear disk. The clamping gear meshes with the front gear disk. An internal and external gear and three planetary gears are rotatably mounted on the gun body. The central gear meshes with the planetary gears, the planetary gears mesh with the internal and external gears, and the internal and external gears mesh with the rear gear disk.

[0013] Furthermore, an insertion tube is fixedly installed on the gun body, and four fixing plates are slidably installed on the gun body. A front rotating rod and a rear rotating rod are rotatably installed on the fixing plates. The front rotating rod is rotatably installed with the front gear plate, and the rear rotating rod is rotatably installed with the rear gear plate.

[0014] First, the insertion tube is inserted into the refrigerant injection tube of the evaporator. When the connecting wheel rotates, it drives some gears to rotate as well. When some gears mesh with the intermittent gears, they drive the intermittent gears to rotate. The intermittent gears drive the missing-tooth gear to rotate via a transmission belt. The missing-tooth gear drives the pinion and the forward gear to rotate. The forward gear drives the worm gear and the worm to rotate via gear transmission and belt transmission. The worm drives the worm wheel and the internal gear disk to rotate. The internal gear disk drives the front gear, the clamping gear, and the inner and outer gears to rotate. The clamping gear drives the front gear disk to rotate. The center gear drives the planetary gear to rotate. The planetary gear drives the inner and outer gears to rotate. The inner and outer gears drive the rear gear disk to rotate. The rotation direction of the rear gear disk is opposite to that of the front gear disk. Thus, through the front and rear rotating rods, the four fixed plates move inward. The refrigerant injection pipe of the evaporator is clamped to the outer wall. When clamping is complete, some gears and intermittent gears are still engaged. After removal or injection, the knob is turned again, and the connecting wheel and some gears continue to rotate. The toothed gear disengages from the pinion and begins to engage with the reverse gear, driving the reverse gear to rotate. The reverse gear drives the pinion and the forward gear to rotate. At this time, the direction of the pinion changes, thereby driving the four fixed plates to move outward, so that the fixed plates no longer clamp the refrigerant injection pipe of the evaporator. Then, some gears disengage from the intermittent gear. That is, each time some gears engage with the intermittent gear, the fixed plates retract inward and expand outward once. When the injection and removal operations are performed, the fixed plates just clamp the refrigerant injection pipe of the evaporator. The fixed plates are only in the clamped state when removing and injecting.

[0015] The advantages of this invention compared with the prior art are: (1) This invention integrates the refrigerant extraction and injection functions into a single gun body device. The entire process can be controlled by a unique knob gear switching mechanism. Operators do not need to replace equipment or frequently disconnect pipelines. One person and one device can sequentially complete the entire work of old refrigerant recovery and new refrigerant charging, which greatly simplifies the operation steps, significantly improves the efficiency of maintenance and repair, and reduces the possibility of errors caused by complex operation; (2) This invention adopts a mechanical connection mechanism based on gear transmission and worm gear self-locking effect. After the injection port is inserted, the four fixed plates are indirectly driven to perform synchronous and symmetrical radial movement by rotating the knob, thereby firmly clamping them on the outer wall of the evaporator refrigerant injection pipe. This design ensures a stable and reliable connection between the charging device and the evaporator, which can effectively withstand charging and The internal pressure during the extraction process prevents refrigerant leakage under high pressure, greatly improving the safety and environmental friendliness of the operation process; (3) The upper one-way plug, side one-way plug and piston structure in the extraction mechanism of this invention can completely and efficiently discharge the original refrigerant in the evaporator and collect it in the lower shell before pushing it out through the outlet. This process avoids the mixing of new and old refrigerants and ensures the purity of the newly injected refrigerant, thereby ensuring the efficient and stable operation of the horizontal vortex evaporator and even the entire refrigeration system, and extending the service life of the equipment; (4) All actions of the entire equipment of this invention, including the clamping and loosening of the connecting mechanism, the switching of extraction and injection functions, and the opening and closing of the flow channel, are all achieved by rotating the same knob and linking it with the motor switch. The operator only needs to perform simple rotation and button operation to accurately control all functions. The body structure is compact and highly reliable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention (internal).

[0018] Figure 3 Schematic diagram of the injection mechanism structure of the present invention Figure 1 .

[0019] Figure 4 Schematic diagram of the injection mechanism structure of the present invention Figure 2 .

[0020] Figure 5 Schematic diagram of the injection mechanism structure of the present invention Figure 3 .

[0021] Figure 6 Schematic diagram of the injection mechanism structure of the present invention Figure 4 .

[0022] Figure 7This is a schematic diagram of the extraction mechanism of the present invention. Figure 1 .

[0023] Figure 8 This is a schematic diagram of the extraction mechanism of the present invention. Figure 2 .

[0024] Figure 9 This is a schematic diagram of the extraction mechanism of the present invention. Figure 3 .

[0025] Figure 10 This is a schematic diagram of the connection mechanism structure of the present invention. Figure 1 .

[0026] Figure 11 This is a schematic diagram of the connection mechanism structure of the present invention. Figure 2 .

[0027] Figure 12 This is a schematic diagram of the connection mechanism structure of the present invention. Figure 3 .

[0028] Figure 13 for Figure 12 A magnified view of a portion of point A in the middle.

[0029] Reference numerals: 101-Gun body; 102-Knob; 103-Motor; 104-Groove rod; 105-Switching lever; 106-Switching gear; 107-Connecting wheel; 108-Partial gear; 109-Feed impeller; 110-Feed housing; 111-Upper docking gear; 112-Crank rod; 113-Pressure gauge; 114-Input gear; 115-Output chamber; 116-Inner column; 201-Lower housing; 202-Lower docking gear; 203-Lower wheel; 204-Lower lever; 205-Lifting frame; 206-Extraction plug; 207-Upper one-way plug; 208-Upper spring; 209- 210-Side one-way plug; 211-Side spring; 212-Side frame; 213-Lifting rod; 301-Intermittent gear; 302-Gear with missing tooth; 303-Reverse gear; 304-Pinal gear; 305-Forward gear; 306-Worm; 307-Internal gear disc; 308-Worm wheel; 309-Front gear; 310-Center gear; 311-Internal and external gears; 312-Planetary gear; 313-Rear gear disc; 314-Front gear disc; 315-Front rotating rod; 316-Rear rotating rod; 317-Fixing plate; 318-Insert tube; 319-Worm gear; 320-Clamping gear. Detailed Implementation

[0030] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0031] Example: Reference 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. 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Initially, knob 102 is in the off position. First, the injection mechanism is connected to the evaporator injection port via the connecting mechanism, and the external refrigerant pipe is connected to the inlet shell 110. The existing refrigerant in the evaporator needs to be emptied before new refrigerant is injected. When switching from the extraction position to the injection position, knob 102 is turned clockwise. Knob 102 drives crank 112 to rotate, which in turn drives the inner column 116 to rotate eccentrically. Through the sliding of the inner column 116 in the long slot of the grooved rod 104, the grooved rod 104 and the switching rod 105 are rotated, causing the switching gear 106 to disengage from the lower mating gear 202. Subsequently, the switching gear 106 meshes with the upper docking gear 111. When the crank 112 rotates, it also drives the connecting wheel 107 to rotate via the transmission belt. The connecting wheel 107 connects the output chamber 115 and the inlet shell 110. When the switch is pressed, the motor 103 drives the input gear 114 to rotate via gear transmission. The input gear 114 drives the switching gear 106 to rotate via the transmission belt. The switching gear 106 drives the upper docking gear 111 to rotate. The upper docking gear 111 drives the inlet impeller 109 to rotate via the transmission belt, sending the refrigerant from the inlet shell 110 through the connecting wheel 107 to the output chamber 115, and then injecting it into the evaporator.

[0036] like Figures 7-9 As shown, the extraction mechanism includes a lower rotating rod 204 rotatably mounted on the lower housing 201, a lower wheel 203 fixedly mounted on the lower rotating rod 204, and a lower mating gear 202 driving the lower wheel 203 to rotate via a transmission belt. An extraction plug 206 is slidably mounted inside the lower housing 201, a lifting frame 205 is fixedly mounted on the extraction plug 206, and a lifting rod 213 is fixedly mounted on the lifting frame 205. The lifting rod 213 is rotatably mounted with the lower rotating rod 204.

[0037] like Figures 7-9 As shown, an upper through frame 209 is fixedly installed inside the lower shell 201. An opening is provided on the upper through frame 209. An upper one-way plug 207 is slidably installed on the upper through frame 209. An upper spring 208 is provided between the upper one-way plug 207 and the upper through frame 209. A side through frame 212 is fixedly installed inside the lower shell 201. A side one-way plug 210 is slidably installed on the side through frame 212. A side spring 211 is provided between the side one-way plug 210 and the side through frame 212.

[0038] First, the existing refrigerant in the evaporator needs to be purged. Turn knob 102 clockwise. Knob 102 drives crank 112 to rotate, which in turn drives inner column 116 to rotate eccentrically. Through the sliding of inner column 116 in the long slot of slotted rod 104, slotted rod 104 and switching rod 105 are driven to rotate, causing switching gear 106 to mesh with lower mating gear 202. When crank 112 rotates, it also drives connecting wheel 107 to rotate via transmission belt. Connecting wheel 107 connects output chamber 115 and lower shell 201. Press the switch, and motor 103 drives input gear 114 to rotate via gear transmission. Input gear 114 drives switching gear 106 to rotate via 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 via the transmission belt, thereby driving the lifting rod 213, the lifting frame 205 and the extraction plug 206 to rise and fall. When the extraction plug 206 descends, it pulls the upper one-way plug 207 downward, and the upper spring 208 is compressed, drawing the original refrigerant in the evaporator into the output chamber 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 rises, the upper one-way plug 207 does not move, pushing the side one-way plug 210 to slide outward, and the side spring 211 is compressed, squeezing the refrigerant in the lower shell 201 through the discharge port.

[0039] like Figures 10-13 As shown, the connecting mechanism includes an intermittent gear 301 and a toothed gear 302 rotatably mounted inside the gun body 101. The intermittent gear 301 meshes with a partial gear 108. The intermittent gear 301 drives the toothed gear 302 to rotate via a transmission belt. A reverse gear 303 and a forward gear 305 are rotatably mounted inside the gun body 101. A pinion 304 is fixedly mounted on the forward gear 305. The pinion 304 meshes with the reverse gear 303. When the toothed gear 302 meshes with the pinion 304, the toothed gear 302 does not mesh with the reverse gear 303. When the toothed gear 302 meshes with the reverse gear 303, the toothed gear 302 does not mesh with the pinion 304. A worm gear 306 is rotatably mounted inside the gun body 101. A worm gear 319 is fixedly mounted on the worm gear 306. The forward gear 305 drives the worm gear 319 to rotate via gear transmission and belt transmission.

[0040] like 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.

[0041] 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.

[0042] First, the insertion tube 318 is inserted into the refrigerant injection tube of the evaporator. When the connecting wheel 107 rotates, it drives part of the gear 108 to rotate as well. After part of the gear 108 meshes with the intermittent gear 301, part of the gear 108 drives the intermittent gear 301 to rotate. The intermittent gear 301 drives the toothed gear 302 to rotate via a transmission belt. The toothed 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 via gear transmission and belt transmission. The worm gear 306 drives the worm wheel 308 and the internal gear disk 307 to rotate. The internal gear disk 307 drives the front gear 309, the clamping gear 320, and the internal and external gears 311 to rotate. The clamping gear 320 drives the front gear disk 314 to rotate. The center gear 310 drives the planetary gear 312 to rotate. The planetary gear 312 drives the internal and external gears 311 to rotate. The internal and external gears 311 drive the rear gear disk 313 to rotate. The rotation direction of the rear gear disk 313 is opposite to that of the front gear disk 314. Thus, through the front rotating rod 315 and the rear rotating rod 316, four fixed... The plate 317 moves inward, clamping the outer wall of the evaporator's refrigerant injection pipe through the four fixed plates 317. When clamping is complete, part of the gear 108 is still engaged with the intermittent gear 301. After removal or injection is completed, the knob 102 is rotated again, and the connecting wheel 107 and part of the gear 108 continue to rotate. The toothed gear 302 disengages from the pinion 304, and the toothed gear 302 begins to mesh with the reverse gear 303, driving the reverse gear 303 to rotate. The reverse gear 303 drives the pinion 304 and the forward gear 304. When wheel 305 rotates, the direction of rotation of pinion 304 changes, thereby driving the four fixed plates 317 to move outward, so that the fixed plates 317 no longer clamp the evaporator refrigerant injection pipe. Subsequently, part of gear 108 disengages from intermittent gear 301. That is, each time part of gear 108 engages with intermittent gear 301, the fixed plates 317 retract inward and expand outward once. When the injection and removal operations are performed, the fixed plates 317 just clamp the evaporator refrigerant injection pipe. The fixed plates 317 are in the clamped state only when the injection and removal operations are performed.

[0043] The working principle of the refrigerant charging device for a horizontal vortex evaporator disclosed in this invention is as follows: First, the insertion tube 318 is inserted into the refrigerant injection tube of the evaporator. In the initial state, the knob 102 is in the off position. First, the original refrigerant in the evaporator needs to be emptied. Rotate the knob 102 clockwise. The knob 102 drives the crank 112 to rotate. The crank 112 drives the inner column 116 to rotate eccentrically. Through the sliding of the inner column 116 in the long groove of the slot rod 104, the slot rod 104 and the switching rod 105 are driven to rotate, so that the switching gear 106 meshes with the lower connecting gear 202. When the crank 112 rotates, it also drives the connecting wheel 107 to rotate through the transmission belt. The through wheel 107 connects the output cavity 115 and the lower housing 201. When the through wheel 107 rotates, it drives a portion of the gears 108 to rotate as well. When the portion of the gears 108 meshes with the intermittent gear 301, the portion of the gears 108 drives the intermittent gear 301 to rotate. The intermittent gear 301 drives the toothed gear 302 to rotate via a transmission belt. The toothed 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 via gear transmission and belt transmission. The worm 306 drives the worm wheel 308 and the internal gear disk 307 to rotate. The internal gear disk 307 drives the front gear 309, the clamping gear 320, and the internal and external gears 311. The rotation of the clamping gear 320 drives the front gear 314 to rotate, the central gear 310 drives the planetary gear 312 to rotate, the planetary gear 312 drives the inner and outer gears 311 to rotate, and the inner and outer gears 311 drive the rear gear 313 to rotate. The rotation direction of the rear gear 313 is opposite to that of the front gear 314. This, through the front rotating rod 315 and the rear rotating rod 316, drives the four fixed plates 317 to move inward. The four fixed plates 317 clamp the outer wall of the refrigerant injection pipe of the evaporator. When clamping is complete, some gears 108 are still meshed with the intermittent gear 301. After removal or injection is completed, the knob 102 is rotated again, and the connecting wheel 107 and some gears 108 continue to rotate. When the toothed gear 302 disengages from the pinion 304, it begins to mesh with the reverse gear 303, causing the reverse gear 303 to rotate. The reverse gear 303 then drives the pinion 304 and the forward gear 305 to rotate. At this time, the direction of the pinion 304 changes, thereby causing the four fixed plates 317 to move outward, so that the fixed plates 317 no longer clamp the evaporator refrigerant injection pipe. Subsequently, some gears 108 disengage from the intermittent gear 301. That is, each time some gears 108 meshes with the intermittent gear 301, the fixed plates 317 retract inward and expand outward once. During the injection and removal operations, the fixed plates 317 just clamp the evaporator refrigerant injection pipe.When the switch is pressed, the motor 103 drives the input gear 114 to rotate via gear transmission. The input gear 114 drives the switching gear 106 to rotate via a 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 via a transmission belt, thereby driving the lifting rod 213, the lifting frame 205, and the extraction plug 206 to rise and fall. When the extraction plug 206 descends, it pulls the upper one-way plug 207 downward, compressing the upper spring 208 and drawing the original refrigerant in the evaporator into the output chamber 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 rises, the upper one-way plug 207 does not move, pushing the side one-way plug 210 to slide outward, compressing the side spring 211 and squeezing the refrigerant in the lower shell 201 out through the discharge port. When switching from the extraction position to the injection position, continue turning the knob 102 clockwise. The knob 102 drives the crank 112 to rotate, which in turn drives the inner column 116 to rotate eccentrically. Through the sliding of the inner column 116 within the long groove of the grooved rod 104, the grooved rod 104 and the switching lever 105 are driven to rotate, causing the switching gear 106 to disengage from the lower engaging gear 202. Subsequently, the switching gear 106 engages with the upper engaging gear 111. When the crank 112 rotates, it also drives the connecting pulley via the transmission belt. When 107 rotates, the output chamber 115 and the inlet shell 110 are connected through the connecting 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 the transmission belt. The switching gear 106 drives the upper docking gear 111 to rotate. The upper docking gear 111 drives the inlet impeller 109 to rotate through the transmission belt, so that the refrigerant is sent from the inlet shell 110 through the connecting wheel 107 to the output chamber 115, and then injected into the evaporator.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope of the present invention based on the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A refrigerant charging device for a horizontal vortex evaporator, comprising an injection mechanism for injecting external refrigerant into the evaporator, characterized in that: The injection mechanism includes a gun body (101), and the injection mechanism is provided with 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 mating gear (202) rotatably installed in the gun body (101), and a lower shell (201) is fixedly installed below the gun body (101). 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 provided 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) provided inside the gun body (101).

2. The refrigerant charging device for a horizontal cyclone evaporator according to claim 1, characterized in that: The injection mechanism also includes a motor (103) fixedly mounted on the gun body (101), an input gear (114) rotatably mounted on the switching rod (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 the 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 is provided on the groove rod (104), the inner column (116) slides in the long groove of the groove rod (104), the crank (112) drives the connecting wheel (107) to rotate through belt transmission, and a pressure gauge (113) is fixedly mounted on the gun body (101).

3. The refrigerant charging device for a horizontal cyclone evaporator according to claim 2, characterized in that: A feed housing (110) is fixedly installed on the gun body (101). A feed impeller (109) is rotatably installed inside the feed housing (110). 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.

4. The refrigerant charging device for a horizontal cyclone evaporator according to claim 3, characterized in that: The knob (102) has three positions: injection, extraction, and off. When the knob (102) is turned to the injection position, the switching gear (106) meshes with the upper docking gear (111), and the connecting wheel (107) connects the feed housing (110) and the output chamber (115) through the connecting port. When the knob (102) is turned to the extraction position, the switching gear (106) meshes with the lower docking gear (202), and the connecting wheel (107) connects the lower housing (201) and the output chamber (115) through the connecting port. When the knob (102) is turned to the off position, the switching gear (106) does not mesh with either the lower docking gear (202) or the upper docking gear (111), and the connecting port of the connecting wheel (107) is not connected to the output chamber (115), the lower housing (201), or the feed housing (110).

5. The refrigerant charging device for a horizontal cyclone evaporator according to claim 1, characterized in that: The extraction mechanism includes a lower rotating rod (204) rotatably mounted on the lower shell (201), a lower wheel (203) fixedly mounted on the lower rotating rod (204), a lower mating gear (202) driving the lower wheel (203) to rotate via a transmission belt, an extraction plug (206) slidably mounted inside the lower shell (201), a lifting frame (205) fixedly mounted on the extraction plug (206), a lifting rod (213) fixedly mounted on the lifting frame (205), and the lifting rod (213) rotatably mounted with the lower rotating rod (204).

6. The refrigerant charging device for a horizontal cyclone evaporator according to claim 5, characterized in that: An upper through frame (209) is fixedly installed inside the lower shell (201). An opening is provided on the upper through frame (209). An upper one-way plug (207) is slidably installed on the upper through frame (209). An upper spring (208) is provided between the upper one-way plug (207) and the upper through frame (209). A side through frame (212) is fixedly installed inside the lower shell (201). A side one-way plug (210) is slidably installed on the side through frame (212). A side spring (211) is provided between the side one-way plug (210) and the side through frame (212).

7. The refrigerant charging device for a horizontal cyclone evaporator according to claim 1, characterized in that: The connecting mechanism includes an intermittent gear (301) and a toothed gear (302) rotatably mounted inside the gun body (101). The intermittent gear (301) meshes with a partial gear (108). The intermittent gear (301) drives the toothed gear (302) to rotate via a transmission belt. A reverse gear (303) and a forward gear (305) are rotatably mounted inside the gun body (101). A pinion (304) is fixedly mounted on the forward gear (305). The pinion (304) meshes with the reverse gear (303). When the toothed gear (302) meshes with the pinion (304), the toothed gear (302) does not mesh with the reverse gear (303). When the toothed gear (302) meshes with the reverse gear (303), the toothed gear (302) does not mesh with the pinion (304). A worm gear (306) is rotatably installed inside the gun body (101). A worm gear (319) is fixedly installed on the worm gear (306). The forward gear (305) drives the worm gear (319) to rotate through gear transmission and belt transmission.

8. The refrigerant charging device for a horizontal cyclone evaporator according to claim 7, characterized in that: The gun body (101) is rotatably mounted with an internal gear disk (307), a front gear disk (314), and a rear gear disk (313). A worm gear (308) is fixedly mounted on the internal gear disk (307), and the worm gear (308) meshes with the 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).

9. A refrigerant charging device for a horizontal cyclone evaporator according to claim 8, characterized in that: An insertion tube (318) is fixedly installed on the gun body (101). 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).

Images