Efficient flooded evaporator for magnetic suspension variable-frequency water chilling unit

Abstract

The invention belongs to the field of evaporators, and provides an efficient flooded evaporator for a magnetic suspension variable-frequency water chilling unit, which comprises a barrel, a refrigerant inlet is arranged at the bottom of one end of the barrel, a refrigerant outlet is arranged at the top of the other end of the barrel, and a left sealing plate and a right sealing plate are fixedly mounted at two ends in the barrel respectively. A plurality of heat exchange pipes are installed between the left sealing plate and the right sealing plate, a water return box is fixedly connected to the side face, away from the right sealing plate, of the left sealing plate, a water inlet and outlet box is fixedly connected to the side face, away from the left sealing plate, of the right sealing plate, and the water return box and the water inlet and outlet box are communicated with the two ends of all the heat exchange pipes respectively. By arranging the side grooves and the purging mechanisms, in the refrigerant gasification process, the purging mechanisms can always blow lubricating oil floating on the surface of a refrigerant into the side grooves, the situation that the lubricating oil is left in the barrel for a long time is avoided, the situation that the lubricating oil is attached to the pipe wall of the heat exchange pipe is avoided, and therefore the heat exchange efficiency of the heat exchange pipe is prevented from being reduced.

Description

Technical Field

[0001] The present invention belongs to the field of evaporators, and in particular relates to a high-efficiency flooded evaporator for a magnetic suspension variable frequency chiller. Background Art

[0002] With the advancement of technology, the use of carbon dioxide (CO2) as a refrigerant has gradually become an emerging technology. Integrating carbon utilization with refrigeration, CO2 can be used directly as a natural refrigerant, or captured CO2 can be used to produce synthetic refrigerants. Among existing technologies, the direct use of captured CO2 as a refrigerant (R744) is currently the most mature, effective, and widely used. It successfully converts industrial CO2 emissions into an environmentally friendly and efficient refrigerant, directly reducing the refrigeration industry's carbon footprint (especially direct emissions), alleviating global warming concerns, and is a key force driving the refrigeration industry's low-carbon transition.

[0003] As an advanced refrigeration equipment, the magnetic levitation chiller mainly uses refrigerant as the medium to work. The magnetic levitation chiller is mainly composed of an evaporator, a condenser, an electric motor, a compressor and a control box. During its working process, the gaseous refrigerant is compressed by the compressor and discharged. It enters the condenser and condenses into liquid, and then is divided into two paths. One path of liquid refrigerant enters the evaporator after throttling by the dryer and the expansion valve, and then returns to the compressor after evaporating into gaseous refrigerant through the evaporator. The other path of liquid refrigerant directly returns to the cooling end of the compressor motor. In this process, the liquid refrigerant in the evaporator cools the cooling water in the cooling system.

[0004] However, during the refrigerant circulation process, the gaseous refrigerant (CO2) may take away some of the lubricating oil in the compressor and finally enter the evaporator together. Due to the low temperature and slow flow rate in the evaporator, the lubricating oil may be retained in it, and then cause the lubricating oil to adhere to the wall of the heat exchange tube, thereby reducing the heat transfer efficiency of the evaporator. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller, aiming to solve the technical problem in the prior art that the lubricating oil in the evaporator is easily adhered to the wall of the heat exchange tube, resulting in a decrease in the heat transfer efficiency of the evaporator.

[0006] The present invention is achieved in this way: a high-efficiency full-liquid evaporator for a magnetic levitation variable-frequency chiller comprises a cylinder, the cylinder being a cylinder with openings at both ends, both ends of the cylinder being provided with hemispherical end covers, namely a left end cover and a right end cover, a refrigerant inlet being provided at the bottom of one end of the cylinder, and a refrigerant outlet being provided at the top of the other end of the cylinder, a left sealing plate and a right sealing plate being fixedly installed at both ends of the interior of the cylinder, a sealed cavity being formed between the left sealing plate and the right sealing plate, a plurality of heat exchange tubes being installed between the left sealing plate and the right sealing plate, both ends of all the heat exchange tubes respectively passing through the left sealing plate and the right sealing plate, and the left sealing plate being away from the refrigerant outlet. A return water box is fixedly connected to the side of the right sealing plate, and an inlet and outlet water box is fixedly connected to the side of the right sealing plate facing away from the left sealing plate, the return water box and the inlet and outlet water boxes are respectively connected to the two ends of all the heat exchange tubes, and a partition plate is fixedly connected to the interior of the inlet and outlet water box, and the partition plate divides the interior of the inlet and outlet water box into a water inlet cavity and a water outlet cavity, and the water inlet cavity and the water outlet cavity are both connected to the heat exchange tubes, and a cooling water outlet pipe and a cooling water inlet pipe are fixedly connected to the side of the inlet and outlet water box, one end of the cooling water outlet pipe and the cooling water inlet pipe both extend out of the end cover, the cooling water outlet pipe is connected to the water outlet cavity, and the cooling water inlet pipe is connected to the water inlet cavity;

[0007] Both sides of the interior of the cylinder are fixedly connected to folded plates, each of which is an L-shaped plate. A side groove is formed between the folded plate and the inner wall of the cylinder. A second oil return pipe is fixedly connected to the side of the cylinder, and one end of the second oil return pipe is connected to the side groove.

[0008] A purge mechanism is also installed inside the cylinder, and the purge mechanism is located above all the heat exchange tubes. The purge mechanism is used to blow the lubricating oil floating on the refrigerant into the side groove so that the lubricating oil can be introduced back into the compressor again. At the same time, it prevents the lubricating oil from staying inside the cylinder for a long time, causing it to adhere to the tube wall of the heat exchange tube, thereby avoiding a reduction in the heat exchange efficiency of the heat exchange tube.

[0009] Further technical solution: the purge mechanism includes a transfer air box fixedly mounted on the side of the right sealing plate / left sealing plate, two purge pipes are rotatably mounted on the transfer air box, one end of the two purge pipes is rotatably mounted on the left sealing plate / right sealing plate, the two purge pipes are both connected to the transfer air box, a plurality of air holes are opened on the two purge pipes, an air supply mechanism is fixedly mounted on the side of the transfer air box, the air supply mechanism is used to supply air into the transfer air box, the gas in the transfer air box enters the two purge pipes and is blown out from the air holes;

[0010] The purge mechanism also includes a driving mechanism, which is installed on the side of the left sealing plate / right sealing plate. The driving mechanism is used to drive the two purge pipes to rotate synchronously in opposite directions, so that the gas blown out from the air holes can drive the lubricating oil on the refrigerant into the side groove.

[0011] Further technical solution: the air-filling mechanism includes an air-filling cylinder fixedly mounted on the side of the transit air box, a piston block is slidably mounted inside the air-filling cylinder, and the side of the piston block facing away from the transit air box is fixedly connected to a piston rod, and four one-way valve assemblies are provided on the air-filling cylinder, namely, two inlet one-way valves and two outlet one-way valves, the two inlet one-way valves and the two outlet one-way valves are respectively located on both sides of the piston block, and are respectively recorded as the first inlet one-way valve, the second inlet one-way valve, the first outlet one-way valve, and the second outlet one-way valve from left to right and from top to bottom, the air-filling mechanism also includes an inlet pipe and an outlet pipe, the inlet pipe is connected to the two inlet one-way valves, the outlet pipe is connected to the two outlet one-way valves, and one end of the outlet pipe is connected to the transit air box;

[0012] The air supply mechanism also includes a transmission mechanism, which is installed on the left sealing plate / right sealing plate. One end of the transmission mechanism is connected to a purge pipe, and the other end of the transmission mechanism is connected to the piston rod. When the purge pipe rotates, the transmission mechanism is used to drive the piston rod to reciprocate.

[0013] Further technical solution: The one-way valve assembly includes a valve body fixedly connected to the air supply cylinder, the valve body is provided with an air passage connected to the interior of the air supply cylinder, the interior of the valve body is also provided with an installation cavity connected to the air passage, a fixing ring connected to the air passage is fixedly connected to the side wall of the installation cavity, and a movable baffle is hinged on the side of the fixing ring. In the natural state, the movable baffle naturally droops and blocks the fixing ring.

[0014] Further technical solution: The transmission mechanism includes a reciprocating screw rotatably mounted on the left sealing plate / right sealing plate, one end of the reciprocating screw is threadedly connected to the piston rod, a first driving gear is fixedly mounted on the purge pipe, and a first driven gear is fixedly mounted on the reciprocating screw, and the first driven gear and the first driving gear are meshed and connected.

[0015] Further technical solution: The diameter of the first driving gear is 3 to 6 times the diameter of the first driven gear, so that the piston rod can move faster, the air supply volume per unit time is greatly increased, and the purging effect is improved.

[0016] Further technical solution: The driving mechanism includes an electric motor fixedly mounted on the left sealing plate / right sealing plate, the output shaft of the electric motor is fixedly connected to a second driving gear, one end of each of the two purge pipes is fixedly connected to a second driven gear, the second driving gear is meshed with a second driven gear, and two meshed intermediate gears are rotatably mounted on the side of the left sealing plate / right sealing plate, and the two intermediate gears are respectively meshed with the two second driven gears.

[0017] Further technical solution: an oil storage tank is fixedly installed on the side of the left sealing plate / right sealing plate, one end of the two purge pipes extends into the oil storage tank, the side of the oil storage tank is connected to a first oil return pipe, one end of the first oil return pipe extends out of the end cover, and an air cylinder is fixedly installed inside each of the purge pipes, the air cylinder is made of air-permeable membrane material, the shape of the air cylinder is a horizontal frustum, the large diameter end of the air cylinder faces the oil storage tank, and the small diameter end of the air cylinder is connected to the transfer air box.

[0018] Further technical solution: multiple heat exchange tubes pass through the side groove.

[0019] Further technical solution: A preheating assembly is also installed at the bottom of the cylinder, and the preheating assembly includes a transverse partition fixedly installed in the cylinder, and a plurality of vertical partitions are fixedly connected to the bottom of the transverse partition, and a plurality of heat exchange tubes pass through the plurality of vertical partitions. The tops of the plurality of vertical partitions are provided with upper flow channels, and the bottoms of the other vertical partitions are provided with lower flow channels. The plurality of upper flow channels and the plurality of lower flow channels are staggered to form a wavy water channel between the plurality of vertical partitions, and the refrigerant inlet is connected to one end of the water channel, and the end of the transverse partition away from the refrigerant inlet is provided with a water outlet connected to the water channel.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention provides a side trough and a purge mechanism. During the refrigerant gasification process, the purge mechanism will continuously blow the lubricating oil floating on the refrigerant surface into the side trough, thereby preventing the lubricating oil from remaining in the cylinder for a long time and adhering to the tube wall of the heat exchange tube, thereby avoiding a reduction in the heat exchange efficiency of the heat exchange tube;

[0022] 2. The present invention provides an air supply mechanism. When the piston rod reciprocates, the air supply mechanism supplies air to the transfer air box, thereby achieving continuous purging of the lubricating oil and greatly improving the recovery efficiency of the lubricating oil.

[0023] 3. The present invention provides an oil storage tank and a breather cylinder. After the gaseous refrigerant in the cylinder is extracted by the air inlet pipe, it is filtered by the breather cylinder, leaving liquid lubricating oil in the breather cylinder. Finally, it flows along the breather cylinder into the oil storage tank, thereby improving the effect of intercepting the lubricating oil and reducing the lubricating oil adhesion rate. This prevents some lubricating oil from being entrained into the compressor by the gaseous refrigerant, causing some lubricating oil to recirculate and subsequently increasing the adhesion rate of lubricating oil to the heat exchange tubes.

[0024] 4. The present invention allows multiple heat exchange tubes to pass through the side trough. After the refrigerant enters the side trough, the multiple heat exchange tubes will exchange heat with the refrigerant in the side trough, thereby re-gasifying the refrigerant and then escaping the side trough, thereby preventing the refrigerant from being drawn out, which will lead to a reduction in the refrigerant amount and a reduction in the cooling effect.

[0025] 5. The present invention sets a preheating component. When the refrigerant is introduced into the cylinder through the refrigerant inlet, the liquid refrigerant will flow along the wavy waterway. The heat exchange tube running through the waterway will exchange heat with the refrigerant, thereby preheating the liquid refrigerant. After the refrigerant flows out from the water outlet, the liquid refrigerant will form a liquid layer above the partition. The liquid layer can fully exchange heat with other heat exchange tubes and will no longer be neutralized by the subsequent low-temperature refrigerant, so that the liquid layer can fully boil, thereby greatly improving the gasification efficiency and improving the working efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the overall internal front view structure of the present invention.

[0028] Figure 3 It is a schematic diagram of the overall internal structure of the present invention when viewed from above.

[0029] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of point A in the middle.

[0030] Figure 5 It is a schematic diagram of the cross-sectional structure of the air replenishing mechanism in the present invention.

[0031] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of point B in the middle.

[0032] Figure 7 For the present invention Figure 5 Enlarged schematic diagram at point C in the middle.

[0033] Figure 8 Schematic diagram of the cross-sectional structure of the purge pipe in the present invention.

[0034] Figure 9 This is a schematic diagram of the structure of the preheating assembly in the present invention when viewed from above.

[0035] Figure 10 It is a schematic diagram of the overall internal structure of the present invention from a side view.

[0036] In the accompanying drawings: 1. Cylinder; 2. Refrigerant inlet; 3. Refrigerant outlet; 4. Purge mechanism; 41. Oil storage tank; 42. First oil return pipe; 43. First drive gear; 44. First driven gear; 45. Purge pipe; 46. Reciprocating screw; 47. Piston rod; 48. Air supply cylinder; 49. Air inlet pipe; 410. Air outlet pipe; 411. Transfer air box; 412. Electric motor; 413. Second drive gear; 414. Second driven gear; 415. Intermediate gear; 416. Breather cylinder; 417. Air hole; 418 , piston block; 419, one-way valve assembly; 4191, valve body; 4192, air duct; 4193, fixing ring; 4194, movable baffle; 4195, installation cavity; 5, left sealing plate; 6, preheating assembly; 61, horizontal partition; 62, upper flow channel; 63, lower flow channel; 64, vertical partition; 65, water outlet; 7, heat exchange tube; 8, right sealing plate; 9, partition plate; 10, water inlet and outlet box; 11, cooling water outlet pipe; 12, cooling water inlet pipe; 13, return water box; 14, second oil return pipe; 15, folding plate. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0039] like Figures 1-10As shown, a high-efficiency full-liquid evaporator for a magnetic levitation variable-frequency chiller provided by the present invention includes a cylinder 1, which is a cylinder with openings at both ends. Both ends of the cylinder 1 are provided with hemispherical end covers, which are left end cover and right end cover. A refrigerant inlet 2 is provided at the bottom of one end of the cylinder 1, and a refrigerant outlet 3 is provided at the top of the other end of the cylinder 1. A left sealing plate 5 and a right sealing plate 8 are fixedly installed at both ends of the interior of the cylinder 1, respectively. A sealed cavity is formed between the left sealing plate 5 and the right sealing plate 8. A number of heat exchange tubes 7 are installed between the left sealing plate 5 and the right sealing plate 8, and both ends of all the heat exchange tubes 7 pass through the left sealing plate 5 and the right sealing plate 8 respectively. The left sealing plate 5 faces away from the side of the right sealing plate 8. A return water box 13 is fixedly connected, and an inlet and outlet water box 10 is fixedly connected to the side of the right sealing plate 8 facing away from the left sealing plate 5. The return water box 13 and the inlet and outlet water boxes 10 are respectively connected to the two ends of all the heat exchange tubes 7. The interior of the inlet and outlet water box 10 is fixedly connected with a partition plate 9, and the partition plate 9 divides the interior of the inlet and outlet water box 10 into an inlet chamber and an outlet chamber. Both the inlet chamber and the outlet chamber are connected to the heat exchange tube 7. A cooling water outlet pipe 11 and a cooling water inlet pipe 12 are fixedly connected to the side of the inlet and outlet water box 10. One end of the cooling water outlet pipe 11 and the cooling water inlet pipe 12 extend out of the end cover, and the cooling water outlet pipe 11 is connected to the outlet chamber, and the cooling water inlet pipe 12 is connected to the inlet chamber.

[0040] Both sides of the interior of the cylinder 1 are fixedly connected to folded plates 15. The folded plates 15 are "L"-shaped plates. A side groove is formed between the folded plates 15 and the inner wall of the cylinder 1. A second oil return pipe 14 is fixedly connected to the side of the cylinder 1. One end of the second oil return pipe 14 is connected to the side groove.

[0041] A purge mechanism 4 is also installed inside the cylinder 1. The purge mechanism 4 is located above all the heat exchange tubes 7. The purge mechanism 4 is used to blow the lubricating oil floating on the refrigerant into the side groove so that the lubricating oil can be introduced back into the compressor again. At the same time, it prevents the lubricating oil from staying inside the cylinder 1 for a long time, causing it to adhere to the tube wall of the heat exchange tube 7, thereby avoiding a reduction in the heat exchange efficiency of the heat exchange tube 7.

[0042] The refrigerant inlet 2 is connected to the condenser, the refrigerant outlet 3 is connected to the compressor, and the cooling water outlet pipe 11 and the cooling water inlet pipe 12 are connected to the external cooling system. The cooling system transports hot cooling water to the heat exchange pipe 7 through the cooling water inlet pipe 12. After the hot cooling water flows into the return water box 13, it returns to the water outlet cavity from the heat exchange pipe 7 of other parts, and finally returns to the cooling system from the cooling water outlet pipe 11. During the process, the compressor sends the gaseous refrigerant to the condenser, and the condenser condenses the gaseous refrigerant into liquid and transports it to the cylinder 1 through the refrigerant inlet 2. The liquid refrigerant exchanges heat with the hot cooling water in the heat exchange pipe 7, so that the cooling water returned from the cooling water outlet pipe 11 becomes cooling water with a lower temperature. At the same time, the refrigerant after heat exchange will be vaporized again and then extracted from the refrigerant outlet 3 by the compressor, thereby forming a cycle to achieve cooling of the cooling water.

[0043] During this process, the purge mechanism 4 will continuously blow the lubricating oil floating on the surface of the refrigerant into the side groove, preventing the lubricating oil from remaining in the cylinder 1 for a long time, and preventing the lubricating oil from adhering to the tube wall of the heat exchange tube 7, thereby avoiding a reduction in the heat exchange efficiency of the heat exchange tube 7.

[0044] like Figure 2-Figure 8 As shown, a high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller provided by the present invention, in this embodiment, the purge mechanism 4 includes a transfer air box 411 fixedly mounted on the side of the right sealing plate 8 / left sealing plate 5, in this embodiment, the transfer air box 411 is mounted on the right sealing plate 8, and two purge pipes 45 are rotatably mounted on the transfer air box 411, one end of the two purge pipes 45 is rotatably mounted on the left sealing plate 5 / right sealing plate 8, and the two purge pipes 45 are both communicated with the transfer air box 411, and a plurality of air holes 417 are opened on the two purge pipes 45, and an air supply mechanism is fixedly mounted on the side of the transfer air box 411, and the air supply mechanism is used to supply air to the transfer air box 411, and the gas in the transfer air box 411 enters the two purge pipes 45 and is blown out from the air holes 417;

[0045] The purge mechanism 4 also includes a driving mechanism, which is installed on the side of the left sealing plate 5 / right sealing plate 8. The driving mechanism is used to drive the two purge pipes 45 to rotate synchronously in opposite directions, so that the gas blown out from the air hole 417 can drive the lubricating oil on the refrigerant into the side groove.

[0046] like Figure 2-Figure 8As shown in the figure, a high-efficiency full-liquid evaporator for a magnetic levitation variable frequency chiller provided by the present invention, in this embodiment, the air-supply mechanism includes an air-supply cylinder 48 fixedly mounted on the side of the transfer air box 411, a piston block 418 is slidably mounted inside the air-supply cylinder 48, and the piston block 418 is fixedly connected to the side of the transfer air box 411 with a piston rod 47, and four one-way valve assemblies 419 are provided on the air-supply cylinder 48, which are two inlet one-way valves and two outlet one-way valves. The two inlet check valves and the two outlet check valves are respectively located on both sides of the piston block 418, and are sequentially recorded as the first inlet check valve, the second inlet check valve, the first outlet check valve, and the second outlet check valve from left to right and from top to bottom. The air supply mechanism also includes an inlet pipe 49 and an outlet pipe 410. The inlet pipe 49 is connected to the two inlet check valves, and the outlet pipe 410 is connected to the two outlet check valves. One end of the outlet pipe 410 is connected to the transfer air box 411;

[0047] The air supply mechanism also includes a transmission mechanism, which is installed on the left sealing plate 5 / right sealing plate 8. One end of the transmission mechanism is connected to a purge pipe 45, and the other end of the transmission mechanism is connected to the piston rod 47. When the purge pipe 45 rotates, the transmission mechanism is used to drive the piston rod 47 to reciprocate.

[0048] When the piston rod 47 reciprocates, under negative pressure, one air inlet check valve opens and one air outlet check valve closes; under positive pressure, the other air inlet check valve closes and the other air outlet check valve opens. Therefore, the air inlet pipe 49 can extract the gaseous refrigerant in the cylinder 1 and transport it to the transfer air box 411 through the air outlet pipe 410, and finally blow it out from the air hole 417 on the purge pipe 45. Therefore, no matter whether the piston rod 47 moves to the right or to the left, the air replenishing mechanism will replenish air into the transfer air box 411, thereby realizing uninterrupted purging of the lubricating oil, greatly improving the recovery efficiency of the lubricating oil.

[0049] Specifically, such as Figure 5 As shown, when the piston rod 47 moves to the right, the first air inlet check valve opens, the second air inlet check valve closes, the first air outlet check valve closes, and the second air outlet check valve opens. External air enters the air supply cylinder 48 through the first air inlet check valve, and the air in the air supply cylinder 48 is discharged from the second air outlet check valve.

[0050] When the piston rod 47 moves to the left, the first air inlet one-way valve is closed, the second air inlet one-way valve is opened, the first air outlet one-way valve is opened, and the second air outlet one-way valve is closed. External gas enters the air supply cylinder 48 from the second air inlet one-way valve, and the gas in the air supply cylinder 48 is discharged from the first air outlet one-way valve.

[0051] like Figure 5-Figure 7As shown, a high-efficiency full-liquid evaporator for a magnetic levitation variable-frequency chiller provided by the present invention, in this embodiment, the one-way valve assembly 419 includes a valve body 4191 fixedly connected to the air supply cylinder 48, the valve body 4191 is provided with an air duct 4192 connected to the interior of the air supply cylinder 48, the interior of the valve body 4191 is also provided with an installation cavity 4195 connected to the air duct 4192, the side wall of the installation cavity 4195 is fixedly connected to a fixing ring 4193 connected to the air duct 4192, the side of the fixing ring 4193 is hinged with a movable baffle 4194, and in a natural state, the movable baffle 4194 naturally droops and blocks the fixing ring 4193.

[0052] The structures of the air inlet check valve and the air outlet check valve are similar, the difference is the direction of the movable baffle 4194. The movable baffle 4194 in the air inlet check valve faces the inside of the air supply cylinder 48, and the movable baffle 4194 in the air outlet check valve faces the air outlet pipe 410.

[0053] like Figure 2-Figure 3 As shown, a high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller provided by the present invention. In this embodiment, the transmission mechanism includes a reciprocating screw 46 rotatably mounted on the left sealing plate 5 / right sealing plate 8, one end of the reciprocating screw 46 is threadedly connected to the piston rod 47, a first driving gear 43 is fixedly mounted on the purge pipe 45, and a first driven gear 44 is fixedly mounted on the reciprocating screw 46, and the first driven gear 44 is meshedly connected to the first driving gear 43.

[0054] like Figure 2 As shown, a high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller provided by the present invention. In order to increase the air supply volume of the air supply mechanism and improve the blowing intensity, in this embodiment, the diameter of the first driving gear 43 is 3 to 6 times the diameter of the first driven gear 44, so that the piston rod 47 can move faster, the air supply volume per unit time is greatly increased, and the blowing effect is improved.

[0055] like Figure 2-Figure 3 As shown, a high-efficiency full-liquid evaporator for a magnetic levitation variable-frequency chiller provided by the present invention, in this embodiment, the driving mechanism includes a motor 412 fixedly mounted on the left sealing plate 5 / right sealing plate 8, the output shaft of the motor 412 is fixedly connected to a second driving gear 413, one end of the two purge pipes 45 are fixedly connected to a second driven gear 414, the second driving gear 413 is meshed with a second driven gear 414, and two meshed intermediate gears 415 are rotatably mounted on the side of the left sealing plate 5 / right sealing plate 8, and the two intermediate gears 415 are respectively meshed with the two second driven gears 414.

[0056] like Figure 2-Figure 4 and Figure 8 As shown, a high-efficiency full-liquid evaporator for a magnetic levitation variable-frequency chiller provided by the present invention, when the refrigerant boils, some of the lubricating oil may be entrained into the compressor by the gaseous refrigerant, causing some of the lubricating oil to participate in the circulation again, which in turn leads to an increase in the adhesion rate of the lubricating oil on the heat exchange tube 7. Therefore, in this embodiment, an oil storage tank 41 is fixedly installed on the side of the left sealing plate 5 / right sealing plate 8, and one end of the two purge pipes 45 extends into the oil storage tank 41. The side of the oil storage tank 41 is connected to a first return oil pipe 42, and one end of the first return oil pipe 42 extends out of the end cover. A breather tube 416 is fixedly installed inside each of the purge pipes 45. The breather tube 416 is made of a breathable membrane material, and the outer shape of the breather tube 416 is a horizontal frustum. The large diameter end of the breather tube 416 faces the oil storage tank 41, and the small diameter end of the breather tube 416 is connected to the transfer air box 411.

[0057] After the gaseous refrigerant in the cylinder 1 is extracted by the air inlet pipe 49, it will be transported to the air cylinder 416 through the air supply cylinder 48, the air outlet pipe 410 and the transfer air box 411. The gaseous refrigerant will enter the purge pipe 45 through the air cylinder 416 and be discharged from the air hole 417, while the liquid lubricating oil will remain in the air cylinder 416. Since the air cylinder 416 is a horizontally placed frustum, the bottom cross-section of the air cylinder 416 is inclined downward, so that the lubricating oil will flow along the air cylinder 416 into the oil storage tank 41, thereby improving the effect of intercepting the lubricating oil and reducing the lubricating oil adhesion rate.

[0058] When the oil storage tank 41 is full of lubricating oil, or during the working interval of the refrigeration unit, the lubricating oil in the oil storage tank 41 can be reintroduced into the compressor through the first oil return pipe 42.

[0059] like Figure 10 As shown, a high-efficiency full-liquid evaporator for a magnetic levitation variable-frequency chiller provided by the present invention is used. In order to prevent the boiling refrigerant from being blown into the side groove, so that the refrigerant may re-condense into liquid in the side groove, resulting in the refrigerant being drawn out while the lubricating oil is drawn out, thereby causing a reduction in the amount of refrigerant and a reduction in cooling efficiency. In this embodiment, multiple heat exchange tubes 7 are passed through the side groove.

[0060] After the refrigerant enters the side trough, the multiple heat exchange tubes 7 will also exchange heat with the refrigerant in the side trough, so that the refrigerant is re-gasified and then escapes from the side trough, preventing the refrigerant from being drawn out.

[0061] like Figure 2-Figure 3 and Figure 9As shown, the present invention provides a high-efficiency full-liquid evaporator for a magnetic levitation variable-frequency chiller. After the liquid refrigerant is introduced into the cylinder 1 from the refrigerant inlet 2, the liquid refrigerant forms a liquid layer at the bottom of the cylinder 1. The liquid layer exchanges heat with the cooling water in the heat exchange tube 7, and finally forms a boiling state on the top layer of the liquid layer, and then vaporizes. However, in the vicinity of the refrigerant inlet 2, since the liquid refrigerant with a lower temperature is continuously introduced from the refrigerant inlet 2, the liquid refrigerant with a lower temperature is mixed with the original high-temperature liquid refrigerant in the cylinder 1, resulting in a relatively low temperature of the liquid layer near the refrigerant inlet 2, thereby reducing the boiling effect of the liquid layer above the refrigerant inlet 2 and reducing the amount of refrigerant vaporization, which will cause the operation of the device to The efficiency is reduced. Therefore, in this embodiment, a preheating component 6 is also installed at the bottom of the cylinder 1. The preheating component 6 includes a transverse partition 61 fixedly installed in the cylinder 1. The bottom of the transverse partition 61 is fixedly connected to a plurality of vertical partitions 64. The plurality of heat exchange tubes 7 pass through the plurality of vertical partitions 64. The tops of the plurality of vertical partitions 64 are provided with upper flow channels 62, and the bottoms of the other vertical partitions 64 are provided with lower flow channels 63. The plurality of upper flow channels 62 and the plurality of lower flow channels 63 are staggered, so that a wavy water channel is formed between the plurality of vertical partitions 64. The refrigerant inlet 2 is connected to one end of the water channel, and the end of the transverse partition 61 away from the refrigerant inlet 2 is provided with a water outlet 65 connected to the water channel.

[0062] When the refrigerant is introduced into the cylinder 1 through the refrigerant inlet 2, the liquid refrigerant will flow along the water channel, and the heat exchange tube 7 running through the water channel will exchange heat with the refrigerant, thereby preheating the liquid refrigerant. When the refrigerant flows out from the water outlet 65, the liquid refrigerant will form a liquid layer above the partition 61. The liquid layer can fully exchange heat with other heat exchange tubes 7 and will no longer be neutralized by the subsequent low-temperature refrigerant, so that the liquid layer can fully boil, greatly improving the gasification efficiency and improving the working efficiency of the equipment.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0064] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-efficiency full-liquid evaporator for a magnetic levitation variable-frequency chiller, comprising a cylinder, wherein a refrigerant inlet is provided at a bottom end of the cylinder, and a refrigerant outlet is provided at the top of the other end of the cylinder, wherein the left and right sealing plates are fixedly installed at both ends of the interior of the cylinder, and a plurality of heat exchange tubes are installed between the left and right sealing plates. The side of the left sealing plate facing away from the right sealing plate is fixedly connected to a return water box, and the side of the right sealing plate facing away from the left sealing plate is fixedly connected to an inlet and outlet water box, and the return water box and the inlet and outlet water boxes are respectively connected to the two ends of all the heat exchange tubes. The interior of the water inlet and outlet box is fixedly connected to a partition plate, and the partition plate divides the interior of the water inlet and outlet box into a water inlet chamber and a water outlet chamber, and the water inlet chamber and the water outlet chamber are both connected to the heat exchange pipes, and corresponding cooling water outlet pipes and cooling water inlet pipes are provided on the sides of the water inlet and outlet boxes, which are characterized in that Both sides of the interior of the cylinder are fixedly connected with folded plates, a side groove is formed between the folded plates and the inner wall of the cylinder, and a second oil return pipe is fixedly connected to the side of the cylinder, one end of the second oil return pipe is connected to the side groove; A purge mechanism is also installed inside the cylinder. The purge mechanism is located above all the heat exchange tubes and is used to blow the lubricating oil floating on the refrigerant into the side trough.

2. The high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller according to claim 1, characterized in that: The purge mechanism includes a transfer air box fixedly mounted on the side of the right sealing plate / left sealing plate, two purge pipes are rotatably mounted on the transfer air box, one end of the two purge pipes is rotatably mounted on the left sealing plate / right sealing plate, the two purge pipes are both connected to the transfer air box, and a plurality of air holes are opened on the two purge pipes. An air supply mechanism is fixedly mounted on the side of the transfer air box, and the air supply mechanism is used to supply air into the transfer air box; The purge mechanism further includes a driving mechanism, which is installed on the side of the left sealing plate / right sealing plate, and is used to drive the two purge pipes to rotate synchronously in opposite directions.

3. The high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller according to claim 2, characterized in that: The air-filling mechanism includes an air-filling cylinder fixedly mounted on the side of the transit air box, a piston block being slidably mounted inside the air-filling cylinder, a piston rod being fixedly connected to the side of the piston block facing away from the transit air box, four one-way valve assemblies being provided on the air-filling cylinder, namely, two inlet one-way valves and two outlet one-way valves, one inlet one-way valve and one outlet one-way valve being located on the same side of the piston block, the air-filling mechanism also includes an air inlet pipe and an air outlet pipe, the air inlet pipe being connected to the two inlet one-way valves, the air outlet pipe being connected to the two outlet one-way valves, and one end of the outlet pipe being connected to the transit air box; The air supply mechanism further includes a transmission mechanism, which is installed on the left sealing plate / right sealing plate. When the purge pipe rotates, the transmission mechanism is used to drive the piston rod to reciprocate.

4. The high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller according to claim 3, characterized in that: The one-way valve assembly includes a valve body fixedly connected to the air supply cylinder, an air passage communicating with the interior of the air supply cylinder is provided on the valve body, an installation cavity communicating with the air passage is also provided inside the valve body, a fixing ring communicating with the air passage is fixedly connected to the side wall of the installation cavity, a movable baffle is hinged on the side of the fixing ring, and in a natural state, the movable baffle droops naturally and blocks the fixing ring.

5. The high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller according to claim 3, characterized in that: The transmission mechanism includes a reciprocating screw rotatably mounted on the left sealing plate / right sealing plate, one end of the reciprocating screw is threadedly connected to the piston rod, a first driving gear is fixedly mounted on the purge pipe, and a first driven gear is fixedly mounted on the reciprocating screw, and the first driven gear is meshed with the first driving gear.

6. The high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller according to claim 5, characterized in that: The diameter of the first driving gear is 3 to 6 times the diameter of the first driven gear.

7. The high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller according to claim 3, characterized in that: The driving mechanism includes an electric motor fixedly mounted on the left sealing plate / right sealing plate, the output shaft of the electric motor is fixedly connected to a second driving gear, one end of each of the two purge pipes is fixedly connected to a second driven gear, the second driving gear is meshed with a second driven gear, and two meshed intermediate gears are rotatably mounted on the side of the left sealing plate / right sealing plate, and the two intermediate gears are respectively meshed with the two second driven gears.

8. The high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller according to claim 3, characterized in that: An oil storage tank is fixedly installed on the side of the left sealing plate / right sealing plate, one end of the two purge pipes extends into the oil storage tank, the side of the oil storage tank is connected to the first oil return pipe, and an air cylinder is fixedly installed inside each of the purge pipes. The air cylinder is made of a breathable membrane material, and the shape of the air cylinder is a horizontal frustum. The large diameter end of the air cylinder faces the oil storage tank, and the small diameter end of the air cylinder is connected to the transfer air box.

9. The high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller according to claim 1, characterized in that: A plurality of heat exchange tubes pass through the side grooves.

10. The high-efficiency flooded evaporator for a magnetic levitation variable frequency chiller according to claim 1, characterized in that: A preheating assembly is also installed at the bottom of the cylinder, and the preheating assembly includes a transverse partition fixedly installed in the cylinder, and a plurality of vertical partitions are fixedly connected to the bottom of the transverse partition, and a plurality of heat exchange tubes pass through the plurality of vertical partitions. The tops of the plurality of vertical partitions are provided with upper flow channels, and the bottoms of the other vertical partitions are provided with lower flow channels. The plurality of upper flow channels and the plurality of lower flow channels are staggered to form a wavy water channel between the plurality of vertical partitions. The refrigerant inlet is connected to one end of the water channel, and the end of the transverse partition away from the refrigerant inlet is provided with a water outlet connected to the water channel.

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