A water vapor condensation device

Abstract

The present invention is applicable to the field of water vapor condensation, and provides a water vapor condensation device, including a lower condensation water tank and an upper condensation water tank, wherein the lower condensation water tank is connected to the upper condensation water tank through a secondary condensation component; a connecting shaft is rotatably provided in the lower condensation water tank, and two splash impellers are arranged at intervals on the connecting shaft; a three-way pipe connected to the water vapor air inlet is provided on the inner side of the lower condensation water tank; a water pump is also included, wherein the inlet of the water pump is connected to the inner bottom of the lower condensation water tank, the outlet of the water pump is connected to the inlet of the heat dissipation component at the top of the lower condensation water tank, and the outlet of the heat dissipation component is connected to the atomizer at the top of the lower condensation water tank; a driving component is also included, and the driving component is used to drive the rotation and drive the water pump to work. The present invention realizes multi-stage condensation of water vapor by reasonably designing the condensation path of water vapor, and applying air cooling, liquid cooling, and atomization of the coolant, thereby enhancing the condensation effect of water vapor.

Description

Technical Field

[0001] The invention belongs to the field of water vapor condensation, and in particular relates to a water vapor condensation device. Background Art

[0002] Water vapor condensation devices play an important role in industrial production, air conditioning systems and thermal power generation. In this process, heat transfer, as the core link, drives the energy exchange between high-temperature water vapor and the cooling medium, and enables the water vapor to smoothly transform from gas to liquid. This transformation not only needs to overcome the challenges of the inherent thermodynamic properties and surface tension of water vapor, but also deeply reflects the release and absorption of latent heat during the phase change of matter. At the same time, fluid mechanics considerations are also important, including the flow characteristics, resistance loss and velocity distribution of the fluid in the pipeline. Through optimized design, it is ensured that water vapor can be fully condensed into liquid water.

[0003] The existing water vapor condensing device is not convenient to adjust and does not have a multi-stage cooling function, resulting in insufficient cooling effect and limitations. Therefore, in view of the above situation, it is urgent to develop a water vapor condensing device to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The purpose of the present invention is to provide a water vapor condensing device, which realizes multi-stage cooling and solves the problem of insufficient cooling effect of the water vapor condensing device.

[0005] The present invention is implemented as follows: a water vapor condensation device comprises a lower condensation water tank and an upper condensation water tank installed on the top thereof, wherein the lower condensation water tank and the upper condensation water tank are both filled with coolant, a water vapor air inlet is provided on the front side of the lower condensation water tank, and a water vapor exhaust port is provided on the top box cover of the upper condensation water tank; the lower condensation water tank is connected to the upper condensation water tank through a secondary condensation assembly;

[0006] A connecting shaft is rotatably arranged in the lower condensing water tank, and two splash impellers are arranged on the connecting shaft at intervals;

[0007] A three-way pipe connected to the water vapor inlet and used to transport water vapor to the working area of ​​the splash impeller is provided on the inner side of the lower condensation water tank;

[0008] It also includes a water pump, the inlet of the water pump is connected to the inner bottom of the lower condensation water tank, the outlet of the water pump is connected to the inlet of the heat dissipation component at the top of the lower condensation water tank, and the outlet of the heat dissipation component is connected to the atomizer at the inner top of the lower condensation water tank;

[0009] It also includes a driving assembly, which is used to drive the connecting shaft to rotate and drive the water pump to work;

[0010] The secondary condensation component includes a water vapor conduit and a polytetrafluoroethylene film. An opening for connecting the water vapor conduit is provided on the top cover plate of the lower condensation water tank. The other end of the water vapor conduit is connected to the polytetrafluoroethylene film arranged in the upper condensation water tank. The water vapor conduit is used to introduce the water vapor remaining on the top of the lower condensation water tank into the coolant in the upper condensation water tank. The water vapor enters the coolant through the polytetrafluoroethylene film for secondary condensation. The water vapor conduit and the polytetrafluoroethylene film in the upper condensation water tank are both immersed in the coolant.

[0011] According to a further technical solution, the driving assembly includes a dual-axis motor and an elastic coupling, wherein one output end of the dual-axis motor is transmission-connected to the connecting shaft via the elastic coupling, and the other output end of the dual-axis motor is connected to the input shaft of the water pump.

[0012] According to a further technical solution, the two branches of the three-way pipe are respectively arranged corresponding to the two splash impellers; the splash impeller is nested and fixed on the connecting shaft, and the blades of the splash impeller are partially hollowed out.

[0013] A further technical solution is that the heat dissipation assembly includes a heat dissipation shell, a heat dissipation fan, heat dissipation fins, a heat dissipation pipe and a drive motor. The heat dissipation shell is fixed to the top of a lower condensation water tank, a heat dissipation pipe is fixed to the inner top of the heat dissipation shell, and heat dissipation fins are installed on the heat dissipation pipe. One end of the heat dissipation pipe is connected to the outlet of the water pump through pipe one, and the other end of the heat dissipation pipe is connected to the inner top of the lower condensation water tank through pipe two; a drive motor is also fixed to the inner bottom of the heat dissipation shell, and a heat dissipation fan is fixed to the output end of the drive motor.

[0014] A further technical solution is that the atomizer is connected to the end of pipeline two, and a square partition is installed between the atomizer and the three-way pipe inside the lower condensation water tank. The partition is provided with a water trough for the coolant accumulated thereon to form a water curtain from top to bottom to flow to the three-way pipe area, and a gap is also set between the outer circle of the partition and the inner wall of the lower condensation water tank.

[0015] A further technical solution is that an automatic water filling and drainage component is provided on the inner side of the lower condensate water tank, and the automatic water filling and drainage component includes a slide groove, a slider, a float and a baffle. The side wall of the lower condensate water tank is provided with a water inlet and a drain. The baffle is fixedly connected to the float, and a slider is provided on the rear side of the baffle. The inner side of the lower condensate water tank is provided with a slide groove slidably connected to the slider. The baffle moves with the float and switches between the water inlet and the drain to control the water level in the lower condensate water tank.

[0016] According to a further technical solution, the automatic water filling and drainage assembly also includes a spoiler and an upper cover. The outer side of the float is also provided with a spoiler fixedly connected to the inner wall of the lower condensation water tank. The bottom of the spoiler is an open structure, and a mesh upper cover is fixed on the top of the spoiler.

[0017] According to a further technical solution, a water inlet valve is provided on the top of the upper condensation water tank, and a drain outlet and a drainage outlet are also provided on the side of the upper condensation water tank, and the drainage outlet is connected to the water inlet of the lower condensation water tank through a drainage pipe; a visual water level gauge is also provided on the outside of the upper condensation water tank.

[0018] The water vapor condensation device provided by the present invention has the following beneficial effects:

[0019] The present invention realizes multi-stage condensation of water vapor by reasonably designing the condensation path of water vapor, applying air cooling, liquid cooling and atomization of coolant, and enhances the condensation effect of water vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of a water vapor condensation device provided in an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of a cooling liquid circuit of a water vapor condensing device provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of a partial cross-sectional structure of a water vapor condensation device provided by an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the main structure of a water vapor condensation device provided in an embodiment of the present invention;

[0024] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the AA direction;

[0025] Figure 6 A left-side structural schematic diagram of a water vapor condensing device provided in an embodiment of the present invention;

[0026] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure along the BB direction;

[0027] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of the middle C part;

[0028] Fig. 9 for Figure 7 A schematic diagram of the enlarged structure of the D part;

[0029] Fig.10 for Figure 6 Schematic diagram of the cross-sectional structure along the EE direction;

[0030] Fig.11 A schematic diagram of the fan structure in a water vapor condensation device provided in an embodiment of the present invention;

[0031] Fig.12 A schematic diagram of the structure of an automatic water injection and drainage component in a water vapor condensation device provided in an embodiment of the present invention;

[0032] Fig.13 A schematic diagram of the baffle structure in a water vapor condensation device provided in an embodiment of the present invention.

[0033] In the figure: 1. lower condensate water tank; 2. upper condensate water tank; 3. double-axis motor; 4. water pump; 7. atomizer; 8. tetrafluoroethylene (PTFE) film; 9. visual water level gauge; 10. water inlet valve; 11. water vapor inlet; 12. water vapor exhaust; 13. three-way pipe; 14. drainage port; 15. drainage pipe; 16. elastic coupling; 17. connecting shaft; 18. splash impeller; 19. upper condensate water tank drain; 20. partition; 21. water tank; 22. water vapor duct; 5. cooling fan; 50. cooling fins; 51. cooling duct; 52. driving motor; 60. slide; 62. float; 63. water inlet; 64. drainage port; 65. spoiler; 66. upper cover; 67. baffle. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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.

[0035] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0036] like Figure 1-3 6-8, a water vapor condensation device provided by an embodiment of the present invention comprises a lower condensation water tank 1 and an upper condensation water tank 2 installed on the top thereof, the lower condensation water tank 1 and the upper condensation water tank 2 are both filled with coolant, the lower condensation water tank 1 is connected to the upper condensation water tank 2 through a secondary condensation component, a water vapor air inlet 11 is provided on the front side of the lower condensation water tank 1, and a water vapor exhaust port 12 is provided on the top box cover of the upper condensation water tank 2;

[0037] A connecting shaft 17 is rotatably disposed in the lower condensing water tank 1, and two splash impellers 18 are arranged on the connecting shaft 17 at intervals;

[0038] The inner side of the lower condensation water tank 1 is provided with a three-way pipe 13 connected to the water vapor inlet 11 and used to transport the water vapor to the working area of ​​the splash impeller 18;

[0039] It also includes a water pump 4, the inlet of the water pump 4 is connected to the inner bottom of the lower condensation water tank 1, the outlet of the water pump 4 is connected to the inlet of the heat dissipation component at the top of the lower condensation water tank 1, and the outlet of the heat dissipation component is connected to the atomizer 7 at the inner top of the lower condensation water tank 1;

[0040] It also includes a driving assembly, which is used to drive the connecting shaft 17 to rotate and drive the water pump 4 to work.

[0041] like Figure 1 and 3 As shown, as a preferred embodiment of the present invention, the driving assembly includes a dual-shaft motor 3 and an elastic coupling 16, one output end of the dual-shaft motor 3 is transmission-connected to a connecting shaft 17 through the elastic coupling 16, and the other output end of the dual-shaft motor 3 is connected to an input shaft of a water pump 4. In addition, the two branches of the three-way pipe 13 are arranged corresponding to two splash impellers 18, respectively, to achieve the best working effect; the splash impeller 18 can be nested and fixed on the connecting shaft 17, and the blades of the splash impeller 18 are partially hollowed out, which greatly reduces air resistance and reduces motor energy consumption.

[0042] Preferably, a bracket is fixed to the inner bottom of the lower condensation water tank 1 , and the bracket is rotatably connected to the connecting shaft 17 to improve the stability of the connecting shaft 17 .

[0043] like Figure 3 and 11 As shown, as a preferred embodiment of the present invention, the heat dissipation component includes a heat dissipation shell, a heat dissipation fan 5, heat dissipation fins 50, a heat dissipation pipe 51 and a drive motor 52. The heat dissipation shell is fixed to the top of the lower condensation water tank 1, and a heat dissipation pipe 51 is fixed to the inner top of the heat dissipation shell. Heat dissipation fins 50 are installed on the heat dissipation pipe 51. One end of the heat dissipation pipe 51 is connected to the outlet of the water pump 4 through pipe 1, and the other end of the heat dissipation pipe 51 is connected to the inner top of the lower condensation water tank 1 through pipe 2; a drive motor 52 is also fixed to the inner bottom of the heat dissipation shell, and a heat dissipation fan 5 is fixed to the output end of the drive motor 52. The heat dissipation fan 5 is driven by the drive motor 52, and the circulating coolant is cooled by the joint action of the heat dissipation fins 50. The cooled coolant enters the lower condensation water tank 1 again through pipe 2.

[0044] Preferably, a ventilation hole is provided at the lower portion of the heat dissipation housing to improve the ventilation effect of the heat dissipation fan 5 and prevent debris from being drawn in.

[0045] like Figure 6-8As shown in FIG. 13 , as a preferred embodiment of the present invention, the atomizer 7 is connected to the end of the second pipeline, and a square partition 20 is installed between the atomizer 7 and the three-way pipe 13 inside the lower condensation water tank 1. A water tank 21 is provided on the partition 20. The coolant accumulated on the partition 20 can flow from top to bottom through the water tank 21 to form a water curtain to the three-way pipe 13 area to cool the water vapor at the entrance. Among them, the outer ring of the partition 20 and the inner wall of the lower condensation water tank 1 are provided with a gap to facilitate the upward spread of water vapor. The partition 20 divides the interior of the lower condensation water tank 1 into two parts, the lower part is driven by the splash impeller 18 of the dual-axis motor 3 to splash the coolant in the lower condensation water tank 1 to form a cooling water mist to cool the water vapor, and the upper part is cooled by the atomizer 7 to diffuse the water vapor to the upper part.

[0046] like Figure 1 and 10 As shown, as a preferred embodiment of the present invention, the secondary condensation component includes a water vapor conduit 22 and a tetrafluoroethylene (PTFE) film 8. An opening for connecting the water vapor conduit 22 is provided on the top cover plate of the lower condensation water tank 1. The other end of the water vapor conduit 22 is connected to the tetrafluoroethylene (PTFE) film 8 arranged in the upper condensation water tank 2. The water vapor conduit 22 is used to introduce the water vapor remaining on the top of the lower condensation water tank 1 into the coolant in the upper condensation water tank 2, and the water vapor is condensed again by utilizing the characteristic of the polytetrafluoroethylene (PTFE) film 8 that allows water vapor to pass through but water droplets cannot pass through.

[0047] Preferably, the water vapor conduit 22 and the tetrafluoroethylene (PTFE) film 8 in the upper condensing water tank 2 are immersed in the cooling liquid, and the water vapor penetrates the film into the cooling liquid to be condensed.

[0048] like Figure 5-7 , 9-10 and 12, as a preferred embodiment of the present invention, in order to control the water level of the coolant in the lower condensation water tank 1, the inner side of the lower condensation water tank 1 is provided with an automatic water filling and drainage component, and the automatic water filling and drainage component includes a slide 60, a slider, a float 62, a spoiler 65, an upper cover 66 and a baffle 67. The side wall of the lower condensation water tank 1 is provided with a water inlet 63 and a drain 64. The baffle 67 is fixedly connected to the float 62, and a slider is provided on the rear side of the baffle 67. The inner side of the lower condensation water tank 1 is provided with a slide 60 slidably connected to the slider, so that the baffle 67 can move up and down with the water level. The water level in the lower condensation water tank 1 is controlled by switching the baffle 67 between the water inlet 63 and the drain 64, thereby maintaining a good splash cooling effect.

[0049] It is understood that the baffle 67 refers to Fig.12The arrangement method is sufficient, and the two long plates are arranged corresponding to the water inlet 63 and the drain outlet 64 respectively; when the water level is low, the baffle 67 moves downward to expose the water inlet 63 for water replenishment, and the baffle 67 blocks the drain outlet 64 at this time; when the water level is high, the baffle 67 moves upward to expose the drain outlet 64 for drainage, and the baffle 67 blocks the water inlet 63 at this time.

[0050] like Figure 6 and 9 As shown, the outer side of the float 62 is also provided with a spoiler 65 fixedly connected to the inner wall of the lower condensate water tank 1, the lower side is a through-hole design, and the upper side is a mesh upper cover 66, which can effectively prevent the fluctuation of the coolant in the lower condensate water tank 1 from affecting the automatic water filling and drainage components.

[0051] like Figure 1 and 10 As shown, as a preferred embodiment of the present invention, the top of the upper condensation water tank 2 is provided with a water inlet valve 10 to facilitate water supply to the device. The side of the upper condensation water tank 2 is also provided with an upper condensation water tank drain port 19 and a drainage port 14. The drainage port 14 is connected to the water inlet 63 of the lower condensation water tank 1 through a drainage pipe 15. When the water level is too high, the upper condensation water tank drain port 19 can be used to maintain a normal water level. The drainage port 14 is connected to the water inlet 63 of the lower condensation water tank 1 through the drainage pipe 15, so that water can be supplied to the lower condensation water tank 1 and the water level of the lower condensation water tank 1 can be adjusted. A visual water level gauge 9 is also provided on the outside of the upper condensation water tank 2 to observe the water level inside the water tank so as to adjust the water level.

[0052] The above embodiment of the present invention provides a water vapor condensation device. When in use, a water pump 4 is driven by one end of the dual-axis motor 3 to transport the coolant in the lower condensation water tank 1 to the upper heat dissipation component. After the coolant is cooled by air cooling, the coolant is transported from the top of the lower condensation water tank 1 to the lower condensation water tank 1 through the second pipeline, and the end of the second pipeline is connected to an atomizer 7. The atomized coolant condenses the water vapor in the upper layer of the lower condensation water tank 1. A partition 20 is provided below the atomizer 7. Below the partition 20 is a splash condensation area, which is driven by the other end of the dual-axis motor 3. A pair of splash impellers 18 are driven to splash the coolant in the lower condensation water tank 1, forming a cooling water curtain below the partition 20 to condense the water vapor. The remaining water vapor after condensation in the lower condensation water tank 1 can be transported to the upper condensation water tank 2 through the water vapor conduit 22 on the upper part of the lower condensation water tank 1. The water vapor conduit 22 extending into the upper condensation water tank 2 is immersed in the coolant, and a tetrafluoroethylene (PTFE) film 8 is connected to the end of the water vapor conduit 22. The film allows water vapor to pass through, but water droplets cannot pass through, so as to condense the remaining water vapor again. In the process of condensing water vapor, the automatic water filling and drainage components in the lower condensation water tank 1 can autonomously adjust the water level of the coolant in the lower condensation water tank 1.

[0053] In summary, the present invention realizes multi-stage condensation of water vapor by reasonably designing the condensation path of water vapor, applying air cooling, liquid cooling and atomization of coolant, thereby enhancing the condensation effect of water vapor.

[0054] There is no specific limitation on the control, model and circuit connection of each component, and they can be flexibly set in actual application.

[0055] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A water vapor condensation device, comprising a lower condensation water tank (1) and an upper condensation water tank (2) installed on the top of the lower condensation water tank; The lower condensing water tank (1) and the upper condensing water tank (2) are both filled with cooling liquid; The front side of the lower condensation water tank (1) is provided with a water vapor inlet (11), and the top box cover of the upper condensation water tank (2) is provided with a water vapor exhaust port (12), characterized in that: The lower condensation water tank (1) is connected to the upper condensation water tank (2) via a secondary condensation component; A connecting shaft (17) is rotatably disposed in the lower condensing water tank (1), and two splash impellers (18) are arranged on the connecting shaft (17) at intervals; A three-way pipe (13) is provided on the inner side of the lower condensation water tank (1), which is connected to the water vapor inlet (11) and is used to transport the water vapor to the working area of ​​the splash impeller (18); It also comprises a water pump (4), wherein the inlet of the water pump (4) is connected to the inner bottom of the lower condensing water tank (1), the outlet of the water pump (4) is connected to the inlet of the heat dissipation component at the top of the lower condensing water tank (1), and the outlet of the heat dissipation component is connected to the atomizer (7) at the inner top of the lower condensing water tank (1); It also includes a driving assembly, the driving assembly being used to drive the connecting shaft (17) to rotate and drive the water pump (4) to work; The secondary condensation component comprises a water vapor conduit (22) and a tetrafluoroethylene film (8); An opening for connecting a water vapor conduit (22) is provided on the top cover plate of the lower condensing water tank (1), and the other end of the water vapor conduit (22) is connected to a tetrafluoroethylene film (8) arranged in the upper condensing water tank (2); The water vapor conduit (22) is used to introduce the water vapor remaining on the top of the lower condensing water tank (1) into the coolant in the upper condensing water tank (2), and the water vapor passes through the polytetrafluoroethylene film (8) into the coolant for secondary condensation; The water vapor conduit (22) and the tetrafluoroethylene film (8) in the upper condensing water tank (2) are both immersed in the cooling liquid.

2. The water vapor condensation device according to claim 1, characterized in that: The driving assembly comprises a dual-axis motor (3) and an elastic coupling (16); One output end of the dual-shaft motor (3) is transmission-connected to a connecting shaft (17) via an elastic coupling (16), and the other output end of the dual-shaft motor (3) is connected to an input shaft of a water pump (4).

3. The water vapor condensation device according to claim 1, characterized in that: The two branches of the three-way pipe (13) are arranged corresponding to the two splash impellers (18) respectively; The splash impeller (18) is nested and fixed on the connecting shaft (17), and the blades of the splash impeller (18) are partially hollowed out.

4. The water vapor condensation device according to any one of claims 1 to 3, characterized in that: The heat dissipation assembly comprises a heat dissipation housing, a heat dissipation fan (5), heat dissipation fins (50), a heat dissipation pipe (51) and a drive motor (52); The heat dissipation shell is fixed to the top of the lower condensation water tank (1), a heat dissipation pipe (51) is fixed to the inner top of the heat dissipation shell, and heat dissipation fins (50) are installed on the heat dissipation pipe (51); One end of the heat dissipation pipeline (51) is connected to the outlet of the water pump (4) via pipeline 1, and the other end of the heat dissipation pipeline (51) is connected to the inner top of the lower condensation water tank (1) via pipeline 2; A driving motor (52) is also fixed to the inner bottom of the heat dissipation housing, and a heat dissipation fan (5) is fixed to the output end of the driving motor (52).

5. The water vapor condensation device according to claim 4, characterized in that: The atomizer (7) is connected to the end of the second pipeline, and a square partition (20) is installed inside the lower condensation water tank (1) between the atomizer (7) and the three-way pipe (13). The partition (20) is provided with a water tank (21) for the coolant accumulated thereon to form a water curtain and flow from top to bottom to the three-way pipe (13) area; The outer ring of the partition (20) is also provided with a gap with the inner wall of the lower condensation water tank (1).

6. The water vapor condensation device according to any one of claims 1 to 3, characterized in that: An automatic water filling and drainage assembly is provided on the inner side of the lower condensate water tank (1), and the automatic water filling and drainage assembly comprises a chute (60), a slider, a float (62) and a baffle (67); The side wall of the lower condensation water tank (1) is provided with a water inlet (63) and a water outlet (64); The baffle (67) is fixedly connected to the float (62), a slider is provided on the rear side of the baffle (67), and a slide groove (60) slidably connected to the slider is provided on the inner side of the lower condensation water tank (1); The baffle (67) moves with the float (62) to switch between the water inlet (63) and the water outlet (64) to control the water level in the lower condensation water tank (1).

7. The water vapor condensation device according to claim 6, characterized in that: The automatic water filling and drainage assembly further comprises a spoiler (65) and an upper cover plate (66); The outer side of the float (62) is also provided with a spoiler (65) fixedly connected to the inner wall of the lower condensation water tank (1), and the bottom of the spoiler (65) is an open structure; A mesh upper cover plate (66) is fixed on the top of the spoiler plate (65).

8. The water vapor condensing device according to claim 6, characterized in that: The top of the upper condensation water tank (2) is provided with a water inlet valve (10), and the side of the upper condensation water tank (2) is also provided with an upper condensation water tank drain port (19) and a drainage port (14), and the drainage port (14) is connected to the water inlet (63) of the lower condensation water tank (1) via a drainage pipe (15); A visual water level gauge (9) is also provided on the outer side of the upper condensation water tank (2).

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