Evaporator

Abstract

The invention discloses an evaporator, and relates to the technical field of evaporators, the evaporator comprises an evaporation bin for heat exchange and a separation bin for gas-liquid separation, an annular filter cartridge and a movable filter cover are arranged in the separation bin, and the interior of the annular filter cartridge is used for circulating a gas-liquid mixture; the movable filter casing is connected to the annular filter cylinder in a sliding manner so as to perform gas-liquid separation on the gas-liquid mixture, and the movable filter casing has a first gas-liquid separation state in which the movable filter casing is collected into the annular filter cylinder to form a large thickness and a small surface area, and a second gas-liquid separation state in which the movable filter casing extends out of the annular filter cylinder to form a small thickness and a large surface area. And an air inlet and a heat exchange pipeline are arranged on the evaporation bin. According to the evaporator provided by the invention, when the device normally operates, the movable filter cover is retracted into the annular filter cylinder to form a first gas-liquid separation state; and when the device operates at high power, the movable filter casing extends out of the annular filter cartridge to form a second gas-liquid separation state.

Description

Technical Field

[0001] The present invention relates to the technical field of evaporators, and in particular to an evaporator. Background Art

[0002] Evaporation is the physical process of converting liquid into gas. There are a large number of evaporators in industry, some of which are composed of a heating chamber and an evaporation chamber. The heating chamber is used to provide the evaporation medium with the heat required for evaporation, causing the evaporation medium to boil and vaporize; the evaporation chamber is used to completely separate the gas and liquid phases.

[0003] For example, the patent document with the authorization announcement number CN219045921U and the authorization announcement date May 19, 2023, and the name of the patent document is "A Water Vapor Separation Waste Heat Evaporator", which includes an evaporation bin, one side of which is fixedly connected to an air inlet pipe, and a water tank is arranged above the evaporation bin; the water vapor separation waste heat evaporator, by arranging an exhaust pipe, a water vapor separation bin, a water collecting box and a filter net, when the exhaust gas encounters the cold water in the water pipe for cooling, reaching the standard exhaust volume, the exhaust gas then becomes water vapor, and the water vapor enters the water vapor separation bin through the exhaust pipe, and the water vapor passes through the filter net to separate the water and gas in the water vapor, and the water flows into the water collecting box below through the filter net, and the filtered gas becomes saturated gas and is discharged. Such a setting separates water vapor and effectively improves work efficiency.

[0004] In the prior art, after the exhaust gas undergoes heat exchange and condenses into water vapor, it needs to pass through a filter for gas-liquid separation. Obviously, the thicker the filter, the better the gas-liquid separation effect. However, when the evaporator operates at high power, the water vapor flowing through the filter will increase, and the liquid separated from the filter will increase, thereby reducing the gas pass rate at the filter, and causing more water vapor to accumulate upstream of the filter, thus forming a vicious circle that not only increases the gas pressure upstream of the filter, but also reduces the gas-liquid separation effect of the filter. Summary of the invention

[0005] The object of the present invention is to provide an evaporator to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: An evaporator comprises an evaporation chamber for heat exchange and a separation chamber for gas-liquid separation, wherein the separation chamber is provided with: An annular filter cartridge, the interior of which is used to circulate the gas-liquid mixture; The movable filter cover is slidably connected to the annular filter cartridge to perform gas-liquid separation on the gas-liquid mixture. The movable filter cover has a first gas-liquid separation state in which the annular filter cartridge is retracted to form a larger thickness and a smaller surface area, and a second gas-liquid separation state in which the annular filter cartridge is extended to form a smaller thickness and a larger surface area.

[0007] In the above-mentioned evaporator, the evaporation chamber is provided with an air inlet and a heat exchange pipe.

[0008] In the above-mentioned evaporator, a U-shaped tube is arranged between the evaporation chamber and the separation chamber, one end of the U-shaped tube is connected to the bottom of the evaporation chamber, and the other end is connected to the bottom of the separation chamber.

[0009] In the above-mentioned evaporator, one end of the U-shaped tube extends into the separation chamber, and the annular filter cartridge is sleeved on the end of the U-shaped tube.

[0010] In the above-mentioned evaporator, a connecting frame is fixed on the annular filter cartridge, a connecting shaft is fixed on the connecting frame, a clamping portion is constructed on the connecting shaft, and a movable portion adapted to the clamping portion is fixed on the movable filter cover.

[0011] In the above-mentioned evaporator, the connecting frame is rotatably connected to the end of the U-shaped tube.

[0012] In the above-mentioned evaporator, fan blades are fixed on the connecting frame, and the fan blades are located in the U-shaped tube.

[0013] The above-mentioned evaporator also includes a driving assembly for driving the connecting shaft to rotate.

[0014] In the above-mentioned evaporator, the driving assembly includes a driving motor fixed on the separation chamber and a driving shaft fixed on the output end of the driving motor, and the driving shaft is limit-connected to the connecting shaft.

[0015] The above-mentioned evaporator further includes a counterweight block, a first connecting rod is hinged between the counterweight block and the connecting shaft, and a second connecting rod is hinged between the counterweight block and the movable part.

[0016] In the above technical scheme, the present invention provides an evaporator, when the exhaust gas in the boiler enters the evaporation chamber for heat exchange and cooling, liquid droplets will be condensed and water vapor will be formed. When the water vapor passes through the annular filter cartridge and the movable filter cover in the separation chamber, gas-liquid separation can be carried out; when the device is operating normally, the movable filter cover is retracted into the annular filter cartridge to form a first gas-liquid separation state. At this time, the thickness of the gas-liquid separation structure is large and the surface area is small, thereby improving the efficiency of gas-liquid separation; when the device is operating at high power, the movable filter cover extends out of the annular filter cartridge to form a second gas-liquid separation state. At this time, the thickness of the gas-liquid separation structure is small and the surface area is large, thereby reducing the gas-liquid separation efficiency per unit area of ​​the gas-liquid separation structure and increasing the surface area of ​​the gas-liquid separation structure, thereby avoiding gas accumulation in the evaporation chamber as much as possible, and avoiding water vapor in the gas discharged from the separation chamber as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 A front view provided for yet another embodiment of the present invention; Figure 3 A cross-sectional structural diagram is provided for yet another embodiment of the present invention; Figure 4 A schematic diagram of a connecting shaft structure provided by another embodiment of the present invention; Figure 5 A schematic diagram of a drive shaft structure provided by another embodiment of the present invention; Figure 6 A schematic diagram of the structure of a counterweight block provided in yet another embodiment of the present invention; Figure 7 Another structural schematic diagram of a counterweight block provided in yet another embodiment of the present invention; Figure 8 A schematic diagram of a ratchet structure provided in yet another embodiment of the present invention.

[0019] Description of reference numerals: 1. Evaporation chamber; 2. Separation chamber; 3. Annular filter cartridge; 4. Movable filter cover; 5. Air inlet; 6. Heat exchange pipe; 7. Air outlet; 8. U-shaped pipe; 9. Drain pipe; 10. Connecting frame; 101. Inner circle; 102. Outer ring; 103. Connecting rod; 11. Connecting shaft; 12. Clamping part; 13. Movable part; 14. Fan blade; 15. Driving motor; 16. Driving shaft; 17. Counterweight; 18. First connecting rod; 19. Second connecting rod; 20. Ratchet; 21. Paw. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Reference Figure 1-8The embodiment of the present invention provides an evaporator, including an evaporation chamber 1 for heat exchange and a separation chamber 2 for gas-liquid separation. The separation chamber 2 is provided with an annular filter cartridge 3 and a movable filter cover 4. The interior of the annular filter cartridge 3 is used to circulate a gas-liquid mixture. The movable filter cover 4 is slidably connected to the annular filter cartridge 3 to perform gas-liquid separation on the gas-liquid mixture. The movable filter cover 4 has a first gas-liquid separation state in which the annular filter cartridge 3 is retracted to form a larger thickness and a smaller surface area, and a second gas-liquid separation state in which the annular filter cartridge 3 is extended to form a smaller thickness and a larger surface area. The evaporation chamber 1 is provided with an air inlet 5 and a heat exchange pipe 6.

[0022] Specifically, an air inlet 5 is constructed at one end of the evaporation bin 1 to introduce boiler exhaust gas (waste high-temperature flue gas or high-temperature water vapor generated by the boiler) into the evaporation bin 1, and a heat exchange pipe 6 is arranged in the evaporation bin 1. An evaporation medium flows in the heat exchange pipe 6, and the vaporization temperature of the evaporation medium is relatively low; when the exhaust gas enters the evaporation bin 1, the heat exchange pipe 6 and the evaporation medium can be heated by the exhaust gas, and the evaporation medium can evaporate after absorbing heat, and the exhaust gas condenses droplets to form water vapor after heat exchange and cooling (for high-temperature flue gas, the water vapor generated after condensation will also contain tiny solid particles); then the water vapor generated after condensation is discharged into the separation bin 2, and an air outlet 7 is constructed at the top of the separation bin 2. A filter screen and other structures can be arranged in the separation bin 2 to separate the liquid in the water vapor, so that the separated gas is discharged from the air outlet 7, so that the boiler exhaust gas is discharged after heat exchange and gas-liquid separation; the above are all existing technologies and will not be repeated here. The innovation of the embodiment of the present invention is that an annular filter cartridge 3 and a movable filter cover 4 are arranged in the separation chamber 2, and both of them adopt a filter screen structure (such as a metal wire mesh structure). The annular filter cartridge 3 is constructed as an annular cylindrical structure, and both ends of the annular filter cartridge 3 are constructed as openings; the movable filter cover 4 is constructed as a cylindrical structure adapted to the annular filter cartridge 3, so that the two can be mutually sleeved and slide relative to each other axially, and only one end of the movable filter cover 4 that is sleeved with the annular filter cartridge 3 is constructed as an opening; the wall thickness of the annular part of the movable filter cartridge is the same as the wall thickness of the annular filter cartridge 3, and the wall thickness of the end part of the movable filter cartridge is twice the wall thickness of other positions.

[0023] The advantage of such a configuration is that, after the water vapor enters the separation chamber 2, it is discharged into the opening at one end of the annular filter cartridge 3 away from the movable filter cover 4, so that the water vapor can pass through the annular filter cartridge 3 and the movable filter cover 4 and perform gas-liquid separation (if there are tiny solid particles in the water vapor, the solid particles can also be separated through the filter screen structure, so that the solid particles and the liquid are discharged together). If the device is operated at normal power, the movable filter cover 4 is driven to approach the annular filter cartridge 3 to form a first gas-liquid separation state (a linear drive structure, such as a cylinder structure, can be set between the two to drive the two to be relatively close or away), so that the two overlap to form a filter screen structure with a larger thickness (when the two overlap, the wall thickness of each part of the filter screen structure is the same as the wall thickness at the end of the movable filter cover 4) and a smaller surface area (the surface area available for water vapor to pass through), thereby improving the efficiency of gas-liquid separation through the thicker filter screen structure, and at the same time, the smaller surface area can adapt to the flow rate of water vapor discharged into the separation chamber 2; if the device is operated at a larger power overload, the liquid discharged into the evaporation chamber 1 The increase in exhaust gas increases the flow of water vapor entering the separation chamber 2, which in turn drives the movable filter cover 4 away from the annular filter cartridge 3 to form a second gas-liquid separation state, so that the two are separated from each other to form a filter structure with a smaller thickness (compared to the first gas-liquid separation state, the wall thickness at most positions in the filter structure is half of the wall thickness at the end of the movable filter cover 4) and a larger surface area, thereby performing gas-liquid separation on the water vapor with a larger flow rate through the filter structure with a smaller thickness and a larger surface area, and avoiding the accumulation of water vapor in the evaporation chamber 1 as much as possible (if the water vapor in the evaporation chamber 1 accumulates, its pressure will increase, and the flow rate of water vapor at the filter structure will increase, which will reduce the contact time between the water vapor and the filter structure, and further reduce the efficiency of gas-liquid separation); since the surface area of ​​the filter structure in the second gas-liquid separation state is larger, the water vapor can maintain a lower speed when passing through the filter structure (compared to the filter structure in the first gas-liquid separation state with a smaller surface area), so that the efficiency of gas-liquid separation of the filter structure can be maintained as much as possible.

[0024] An evaporator provided by an embodiment of the present invention condenses liquid droplets and forms water vapor when the exhaust gas in the boiler enters the evaporation bin 1 for heat exchange and cooling. Gas-liquid separation can be performed when the water vapor passes through the annular filter cartridge 3 and the movable filter cover 4 in the separation bin 2. When the device is operating normally, the movable filter cover 4 is retracted into the annular filter cartridge 3 to form a first gas-liquid separation state. At this time, the thickness of the gas-liquid separation structure is relatively large and the surface area is relatively small, thereby improving the efficiency of gas-liquid separation. When the device is operating at high power, the movable filter cover 4 extends out of the annular filter cartridge 3 to form a second gas-liquid separation state. At this time, the thickness of the gas-liquid separation structure is relatively small and the surface area is relatively large, thereby reducing the gas-liquid separation efficiency per unit area of ​​the gas-liquid separation structure and increasing the surface area of ​​the gas-liquid separation structure, thereby avoiding gas accumulation in the evaporation bin 1 as much as possible and avoiding water vapor in the gas discharged from the separation bin 2 as much as possible.

[0025] In another embodiment provided by the present invention, further, a U-shaped tube 8 is provided between the evaporation bin 1 and the separation bin 2, one end of the U-shaped tube 8 is connected to the bottom of the evaporation bin 1, and the other end is connected to the bottom of the separation bin 2. One end of the U-shaped tube 8 extends into the separation bin 2, and the annular filter cartridge 3 is sleeved on the end of the U-shaped tube 8. Specifically, the U-shaped tube 8 is located between the evaporation bin 1 and the separation bin 2 and has a relatively low height. When the boiler exhaust gas is discharged into the evaporation bin 1 through the air inlet 5, the exhaust gas with a higher temperature will be at the top of the evaporation bin 1. As the exhaust gas in the evaporation bin 1 increases, the exhaust gas with a lower temperature after heat exchange will be discharged into the separation bin 2 through the U-shaped tube 8 at the bottom of the evaporation bin 1. Since the annular filter cartridge 3 is sleeved on the end of the U-shaped tube 8, the water vapor discharged into the separation bin 2 can directly pass through the annular filter cartridge 3 and the movable filter cover 4 for gas-liquid separation. The separated liquid flows along the annular filter cartridge 3 to the bottom of the separation bin 2, and the separated gas is discharged through the air outlet 7 at the top of the separation bin 2; a drain pipe 9 is provided at the bottom of the separation bin 2 to discharge the liquid in the separation bin 2. Correspondingly, a drain structure (not shown) can also be provided at the bottom of the U-shaped tube 8 to discharge the condensed liquid in the evaporation bin 1 and the U-shaped tube 8.

[0026] Preferably, a connecting frame 10 is fixed on the annular filter cartridge 3 , a connecting shaft 11 is fixed on the connecting frame 10 , a clamping portion 12 is constructed on the connecting shaft 11 , and a movable portion 13 adapted to the clamping portion 12 is fixed on the movable filter cover 4 . Specifically, the connecting frame 10 is fixed to the end of the annular filter cartridge 3 away from the movable filter cover 4, and the connecting frame 10 will not block the end of the annular filter cartridge 3, the connecting shaft 11, the annular filter cartridge 3 and the movable filter cover 4 have the same central axis, the movable part 13 is located at the end of the movable filter cover 4 away from the U-shaped tube 8 and on the central axis of the movable filter cover 4, the clamping part 12 is constructed as a non-rotating body structure arranged axially along the connecting shaft 11, and the movable part 13 is constructed with a clamping groove adapted to the clamping part 12, so that the movable part 13 and the clamping part 12 can move axially relative to each other but cannot rotate relative to each other (correspondingly, the above-mentioned linear drive structure drives the movable part 13 to slide along the clamping part 12 to drive the movable filter cover 4 to slide on the annular filter cartridge 3). In this way, the annular filter cartridge 3 and the movable filter cover 4 can slide relative to each other without affecting the gas-liquid separation efficiency as much as possible, so that the movable filter cover 4 can switch between the first gas-liquid separation state and the second gas-liquid separation state along the clamping part 12.

[0027] In another embodiment provided by the present invention, further, the connecting frame 10 is rotatably connected to the end of the U-shaped tube 8. Specifically, the connecting frame 10 is divided into an inner circle 101 fixed to the connecting shaft 11 and an outer ring 102 fixed to the annular filter cartridge 3, the inner circle 101 and the outer ring 102 are fixed by a connecting rod 103, and the U-shaped tube 8 is located at one end of the separation chamber 2 and is rotatably connected to the outer ring 102, so that the annular filter cartridge 3 and the U-shaped tube 8 are rotatably connected without affecting the flow of water vapor. The advantage of such an arrangement is that the liquid separated from the water vapor when passing through the annular filter cartridge 3 and the movable filter cover 4 will generally flow downward along the annular filter cartridge 3, and part of the liquid will flow from the inner wall of the U-shaped tube 8 into the U-shaped tube 8. For this reason, the connecting frame 10 is rotatably arranged on the U-shaped tube 8, so that the connecting frame 10 can drive the annular filter cartridge 3 and the movable filter cover 4 to rotate together (a motor structure can be arranged in the separation chamber 2 to drive the connecting shaft 11 and the connecting frame 10 to rotate, which will not be repeated here), so as to generate a certain centrifugal force, and then the liquid separated from the annular filter cartridge 3 and the movable filter cover 4 is thrown onto the inner wall of the separation chamber 2, so that not only the separated liquid can be prevented from flowing into the U-shaped tube 8 as much as possible, but also the separated liquid can be discharged in time to avoid affecting the subsequent flow of water vapor as much as possible (the more liquid on the filter structure, the lower the water vapor passing rate); when the flow rate of water vapor at the annular filter cartridge 3 and the movable filter cover 4 is constant, the rotation of the annular filter cartridge 3 and the movable filter cover 4 can increase the contact area between the two and the water vapor, thereby further improving the efficiency of gas-liquid separation.

[0028] As an alternative to the above motor structure driving the connecting shaft 11 and the connecting frame 10 to rotate, further, a fan blade 14 is fixed on the connecting frame 10, and the fan blade 14 is located in the U-shaped tube 8. Specifically, the fan blade 14 is fixed on the side of the inner circle 101 away from the connecting shaft 11. When water vapor enters the separation chamber 2 through the U-shaped tube 8, the flow of water vapor can drive the fan blade 14, the connecting frame 10 and the connecting shaft 11 to rotate ( Figure 4 In the figure, looking from the bottom up, the water vapor drives the connecting shaft 11 to rotate clockwise), thereby driving the annular filter cartridge 3 and the movable filter cover 4 to rotate. The advantage of such a setting is that the fan blades 14 can passively drive the annular filter cartridge 3 and the movable filter cover 4 to rotate by utilizing the flow of water vapor, so that the annular filter cartridge 3 and the movable filter cover 4 can separate the water vapor from the gas and liquid while rotating, so that the liquid can be removed from the annular filter cartridge 3 and the movable filter cover 4 in time, and the efficiency of gas-liquid separation of the annular filter cartridge 3 and the movable filter cover 4 is improved.

[0029] Furthermore, it also includes a driving assembly for driving the connection shaft 11 to rotate. Specifically, the driving assembly can select a motor structure in the prior art to drive the connection shaft 11 to rotate through the motor structure, so that the motor structure can be stopped according to the situation to drive the connection frame 10 to rotate through the fan blades 14 (corresponding to the normal operation of the device), or the motor structure can be started to drive the connection frame 10 and the fan blades 14 to rotate through the motor (corresponding to the high-power operation of the device), so that the connection frame 10 is driven to rotate to improve the gas-liquid separation efficiency of the annular filter cartridge 3 and the movable filter cover 4, and the flow of water vapor is improved through the rotation of the fan blades 14, so as to avoid gas accumulation in the evaporation chamber 1 as much as possible.

[0030] Preferably, the driving assembly includes a driving motor 15 fixed on the separation bin 2 and a driving shaft 16 fixed on the output end of the driving motor 15, and the driving shaft 16 is limitedly connected to the connecting shaft 11. Specifically, the driving motor 15 is fixed on the top of the separation bin 2, and the driving shaft 16 is fixed on the output end of the bottom of the driving motor 15. The driving shaft 16 extends into the separation bin 2 and is rotatably connected to the separation bin 2; the driving shaft 16 and the connecting shaft 11 can be fixedly connected, so that when the driving motor 15 drives the driving shaft 16 to rotate, the driving shaft 16 can drive the connecting shaft 11 and the connecting frame 10 to rotate (the direction in which the driving shaft 16 drives the connecting shaft 11 to rotate is the same as the direction in which the fan blades 14 drive the connecting shaft 11 to rotate).

[0031] In another embodiment provided by the present invention, as an alternative solution for the above-mentioned linear drive structure to drive the movable filter cover 4 to slide on the annular filter cartridge 3, a counterweight block 17 is further included, a first connecting rod 18 is hinged between the counterweight block 17 and the connecting shaft 11, and a second connecting rod 19 is hinged between the counterweight block 17 and the movable part 13. Specifically, in the above-mentioned embodiment, the annular filter cartridge 3 and the movable filter cover 4 can be passively rotated under the flow of water vapor, and can also be driven by the drive motor 15 to rotate at high speed to improve the efficiency of gas-liquid separation between the two. At the same time, the movable filter cover 4 can also switch the state on the annular filter cartridge 3 to adapt to the high-power operation of the device. Obviously, the two functions can be adaptively combined to switch the movable filter cover 4 and the annular filter cartridge 3 to the second gas-liquid separation state when the device is running at high power and increase the rotation speed of the annular filter cartridge 3 and the movable filter cover 4 by the drive motor 15. The first connecting rod 18 and the second connecting rod 19 are respectively hinged at both ends of the counterweight 17 . The end of the first connecting rod 18 away from the counterweight 17 is hinged on the outer wall of the connecting shaft 11 . The end of the second connecting rod 19 away from the counterweight 17 is hinged on the outer wall of the movable part 13 .

[0032] With such arrangement, when the connecting shaft 11 rotates at a low speed or does not rotate (not rotating means that the flow rate of water vapor is low and cannot drive the fan blades 14 to rotate), the movable part 13 and the counterweight block 17 both fall down under the action of gravity. At this time, the first connecting rod 18 and the second connecting rod 19 are both arranged parallel to the connecting shaft 11, and the movable filter cover 4 and the annular filter cartridge 3 overlap to form a first gas-liquid separation state (such as Figure 6 As shown), this can adapt to the normal operation of the device; as the power of the device increases, the flow rate of water vapor in the U-shaped tube 8 increases, and the rotation speed of the fan blade 14 increases (the increase in the flow rate of water vapor will drive the fan blade 14 to rotate faster). At this time, the liquid separated from the annular filter cartridge 3 and the movable filter cover 4 can be thrown out under the action of centrifugal force to improve the gas-liquid separation efficiency of the annular filter cartridge 3 and the movable filter cover 4. At the same time, when the counterweight block 17 rotates with the connecting shaft 11, it can be moved away from the connecting shaft 11 under the action of centrifugal force (the greater the centrifugal force, the farther the distance between the counterweight block 17 and the connecting shaft 11). In this way, the movable filter cover 4 can be driven by the counterweight block 17 and the second connecting rod 19 to move away from the annular filter cartridge 3 along the connecting shaft 11 (that is, from the first gas-liquid separation state to the second gas-liquid separation state). Separation state switching), in this way, it can adapt to the increase in device power, maximize the efficiency of gas-liquid separation between the annular filter cartridge 3 and the movable filter cover 4, and try to avoid water vapor accumulation in the evaporation bin 1; when the device maintains maximum power operation, the drive motor 15 runs to drive the connecting shaft 11 to rotate at a higher speed (compared with the passive rotation of the fan blades 14 driven by water vapor, the speed of the drive shaft 16 is larger and the drive motor 15 can be adjusted according to the situation), at this time, the counterweight block 17 is further away from the connecting shaft 11 under the action of centrifugal force, so that the first connecting rod 18 and the second connecting rod 19 are basically parallel, so that the movable filter cover 4 can be driven by the counterweight block 17 along the connecting shaft 11 away from the annular filter cartridge 3 to form a second gas-liquid separation state (such as Figure 7 As shown), at this time, the annular filter cartridge 3 and the movable filter cover 4 rotating at high speed and in the second gas-liquid separation state can effectively separate the water vapor into gas and liquid.

[0033] The advantage is that, as the power of the device increases, the water vapor discharged into the separation chamber 2 gradually increases, the rotation speed of the fan blade 14 gradually increases (the increase in the water vapor flow rate and the start-up of the drive motor 15 can both increase the rotation speed of the fan blade 14), the rotation speed of the annular filter cartridge 3 and the movable filter cover 4 gradually increases, and the state gradually changes (that is, the movable filter cover 4 gradually moves away from the annular filter cartridge 3 along the connecting shaft 11), thereby adaptively improving the gas-liquid separation efficiency of the annular filter cartridge 3 and the movable filter cover 4, and avoiding as much as possible the accumulation of water vapor in the evaporation chamber 1 due to a large number of droplets on the annular filter cartridge 3 and the movable filter cover 4 (the increase in the rotation speed of the fan blade 14 can also speed up the flow of water vapor, and avoid as much as possible the accumulation of water vapor in the evaporation chamber 1), and at the same time, the increase in the gas-liquid separation efficiency of the annular filter cartridge 3 and the movable filter cover 4 can also avoid as much as possible the presence of water vapor in the gas discharged from the top of the separation chamber 2.

[0034] As an alternative to the fixed connection between the driving shaft 16 and the connecting shaft 11 , further, a one-way transmission mechanism is provided between the driving shaft 16 and the connecting shaft 11 . Specifically, in the above embodiment, the connecting shaft 11 and the driving shaft 16 are fixedly connected, so that when the fan blades 14 rotate, the driving shaft 16 can be driven to rotate synchronously. Obviously, for some models of the driving motor 15, when the driving motor 15 stops running, there will be a certain resistance to continue to drive the driving shaft 16 to rotate, and it may even affect the driving motor 15. For this reason, a one-way transmission mechanism is set between the driving shaft 16 and the connecting shaft 11, such as the overrunning clutch structure in the prior art. When the water vapor drives the fan blades 14 to rotate forward (clockwise rotation from the side of the U-shaped tube 8 to the separation chamber 2 is forward rotation), the one-way transmission mechanism does not operate, that is, the connecting shaft 11 cannot drive the driving shaft 16 to rotate when it rotates forward relative to the driving shaft 16. When the rotation speed of the connecting shaft 11 needs to be increased, the driving motor 15 drives the driving shaft 16 to rotate forward. At this time, the rotation speed of the driving shaft 16 is greater than the rotation speed of the fan blades 14, so that the driving shaft 16 rotates forward relative to the connecting shaft 11. At this time, the one-way transmission mechanism operates to drive the connecting shaft 11 and the fan blades 14 to rotate synchronously through the driving shaft 16. Such an arrangement can make the connecting shaft 11 and the driving shaft 16 rotate relative to each other when the driving motor 15 is not running, and try to avoid the driving shaft 16 affecting the rotation of the connecting shaft 11 or the connecting shaft 11 affecting the operation of the driving motor 15. Conversely, when the driving motor 15 drives the driving shaft 16 to rotate, it can drive the connecting shaft 11 to rotate, so as to increase the rotation speed of the connecting frame 10, the fan blades 14 and other structures while increasing the flow rate of water vapor.

[0035] Preferably, the one-way transmission mechanism comprises a ratchet 20 fixed on the driving shaft 16 and a pawl 21 hinged to the end of the connecting shaft 11, and a torsion spring is arranged between the pawl 21 and the connecting shaft 11 (this is the prior art, not shown in the figure). Figure 8As shown in the figure (the perspective in the figure is from the U-shaped tube 8 to the separation chamber 2), the pawl 21 is hinged at one end of the connecting shaft 11 close to the driving shaft 16. The pawl 21 is away from the connecting shaft 11 and fits on the inner wall of the ratchet 20 under the action of the torsion spring. The ratchet 20 is fixed on the side of the driving shaft 16 close to the connecting shaft 11, and the pawl 21 is located inside the ratchet 20. If the connecting shaft 11 rotates clockwise relative to the driving shaft 16, the inner wall of the ratchet 20 can force the pawl 21 to overcome the elastic force of the torsion spring and approach the connecting shaft 11, so that the connecting shaft 11 cannot drive the driving shaft 16 to rotate when rotating clockwise. On the contrary, when the driving shaft 16 rotates clockwise relative to the connecting shaft 11, the pawl 21 can be clamped by two adjacent teeth on the inner wall of the ratchet 20, so that the driving shaft 16 can drive the connecting shaft 11 to rotate when rotating clockwise, thereby adapting to the operation of the above-mentioned connecting shaft 11 and the driving shaft 16. The advantage of such a configuration is that when the water vapor drives the fan blades 14 and the connecting shaft 11 to rotate forward, the pawl 21 rotates relative to the inner wall of the ratchet 20. When the pawl 21 passes over a tooth on the inner wall of the ratchet 20, the pawl 21 will hit the inner wall of the ratchet 20 under the action of the torsion spring. At this time, the connecting shaft 11, the annular filter cartridge 3 and the movable filter cover 4 will be subjected to a certain vibration feedback, so that the annular filter cartridge 3 and the movable filter cover 4 can cooperate with intermittent vibration to discharge the separated liquid when rotating at a low speed, thereby further improving the efficiency of gas-liquid separation; when the drive motor 15 runs to drive the connecting shaft 11 to rotate through the drive shaft 16, the ratchet 20 and the pawl 21 are engaged with each other to rotate synchronously, and no vibration will occur between the two. At this time, the high-speed rotating annular filter cartridge 3 and the movable filter cover 4 are sufficient to discharge the separated liquid, thereby adapting to the operation of the evaporator.

[0036] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An evaporator, comprising an evaporation chamber for heat exchange and a separation chamber for gas-liquid separation, characterized in that: The separation chamber is provided with: An annular filter cartridge, the interior of which is used to circulate the gas-liquid mixture; The movable filter cover is slidably connected to the annular filter cartridge to perform gas-liquid separation on the gas-liquid mixture. The movable filter cover has a first gas-liquid separation state in which the annular filter cartridge is retracted to form a larger thickness and a smaller surface area, and a second gas-liquid separation state in which the annular filter cartridge is extended to form a smaller thickness and a larger surface area.

2. An evaporator according to claim 1, characterized in that: The evaporation bin is provided with an air inlet and a heat exchange pipeline.

3. An evaporator according to claim 1, characterized in that: A U-shaped tube is arranged between the evaporation bin and the separation bin, one end of the U-shaped tube is communicated with the bottom of the evaporation bin, and the other end of the U-shaped tube is communicated with the bottom of the separation bin.

4. An evaporator according to claim 3, characterized in that: One end of the U-shaped tube extends into the separation chamber, and the annular filter cartridge is sleeved on the end of the U-shaped tube.

5. An evaporator according to claim 4, characterized in that: A connecting frame is fixed on the annular filter cartridge, a connecting shaft is fixed on the connecting frame, a clamping portion is configured on the connecting shaft, and a movable portion adapted to the clamping portion is fixed on the movable filter cover.

6. An evaporator according to claim 5, characterized in that: The connecting frame is rotatably connected to the end of the U-shaped tube.

7. An evaporator according to claim 6, characterized in that: The connecting frame is fixed with fan blades, and the fan blades are located in the U-shaped tube.

8. An evaporator according to claim 7, characterized in that: Also included is a driving assembly for driving the connecting shaft to rotate.

9. An evaporator according to claim 8, characterized in that: The driving assembly comprises a driving motor fixed on the separation bin and a driving shaft fixed on the output end of the driving motor, and the driving shaft is limit-connected to the connecting shaft.

10. An evaporator according to claim 9, characterized in that: It also includes a counterweight block, a first connecting rod is hinged between the counterweight block and the connecting shaft, and a second connecting rod is hinged between the counterweight block and the movable part.

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