A wax water paste making machine

Abstract

The present invention discloses a wax water paste-making machine, which includes a frame; a paste-making cylinder rotatably arranged on the frame and cooling the wax liquid into a paste state and adhering it to its surface after contacting the wax liquid; and a wax liquid pool with wax liquid therein; a part of the surface of the paste-making cylinder contacts the wax liquid in the wax liquid pool; the paste-making cylinder includes an outer cylinder and an inner cylinder, and a cooling cavity for fluid circulation is formed between the outer cylinder and the inner cylinder. The present invention provides a wax water paste-making machine. By providing a paste-making cylinder with an inner and outer layer structure and arranging a cooling cavity between the inner and outer layers, the volume of the coolant storage is greatly reduced, the circulation speed of the liquid in the cooling cavity is accelerated, thereby improving the circulation efficiency and greatly improving the paste-making efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of paste-making machines, and in particular to a wax-water paste-making machine. Background Art

[0002] A wax-water paste-making machine is a device for making paste-like wax blocks, wax sheets or wax grains from wax water, and it usually consists of components such as a paste-making cylinder, a wax liquid pool and a scraper.

[0003] The principle of the above-mentioned paste-making machine is to cool the surface of the paste-making cylinder by circulating cooling liquid in the paste-making cylinder, and then contact with the wax liquid in the wax liquid pool, so that the wax liquid solidifies on the surface of the paste-making cylinder and then the solidified wax liquid is scraped off by the scraper to form wax paste; however, this cooling method of the paste-making machine has the following disadvantages and deficiencies:

[0004] The paste-making cylinder generally has a large diameter, and it requires a large amount of coolant when its interior is filled with cooling liquid, and the cooling liquid needs to be circulated in time to dissipate the heat absorbed when the surface of the paste-making cylinder contacts the wax liquid. After filling the interior of the paste-making cylinder with cooling liquid, its circulation speed drops significantly, resulting in poor solidification effect during paste-making;

[0005] In addition, the existing paste-making cylinder is not provided with a condensate protection device on both sides, resulting in condensate dripping into the wax liquid pool and affecting the quality of the wax mold. Summary of the Invention

[0006] The present invention provides a wax-water paste-making machine in view of the deficiencies in the prior art.

[0007] To solve the above technical problems, the present invention is solved by the following technical solutions: A wax-water paste-making machine includes

[0008] a frame;

[0009] a paste-making cylinder, rotatably arranged on the frame and contacting with the wax liquid to cool the wax liquid into a paste and adhere to its surface; and

[0010] a wax liquid pool, with wax liquid therein;

[0011] Part of the surface of the paste-making cylinder contacts with the wax liquid in the wax liquid pool;

[0012] The paste-making cylinder includes an outer cylinder and an inner cylinder, and a cooling cavity for fluid circulation is formed between the outer cylinder and the inner cylinder.

[0013] In the above solution, preferably, the outer cylinder includes an outer cylinder body and first end plates symmetrically arranged at both ends of the outer cylinder body, and a rotating shaft cooperating with the frame is provided on the first end plate.

[0014] In the above solution, preferably, the inner cylinder includes an inner cylinder body and second end plates symmetrically arranged at both ends of the inner cylinder body, and the inner cylinder body is connected to the inner wall of the outer cylinder through a plurality of support plates.

[0015] In the above solution, preferably, the cooling cavity includes a first cavity formed between the inner cylinder and the outer cylinder and a second cavity formed between the first end plate and the second end plate;

[0016] The first cavity communicates with the second cavity.

[0017] In the above solution, preferably, a liquid injection pipe and a return pipe connected to the cooling cavity are provided on the frame, and the liquid injection pipe is connected to a pump body.

[0018] In the above solution, preferably, a first hole body cooperating with the liquid injection pipe and the return pipe is provided on the rotating shaft on any one side of the outer cylinder, a second hole body is provided at the center of the inner cylinder, and the liquid injection pipe is sequentially arranged through the first hole body and the second hole body.

[0019] In the above solution, preferably, a return cavity is formed between the outer wall of the liquid injection pipe and the inner wall of the first hole body, and the return pipe is connected to the return cavity.

[0020] In the above solution, preferably, a rotary joint is connected to the rotating shaft on the side where the first hole body is provided, and the rotary joint includes a liquid injection hole connected to the liquid injection pipe and a return hole connected to the return pipe.

[0021] In the above solution, preferably, the end of the rotary joint is rotatably connected to the rotating shaft, and a connection cavity communicating with the return cavity is provided inside it.

[0022] In the above solution, preferably, guard plates for preventing the formation of condensed water are provided on both sides of the outer cylinder.

[0023] The beneficial effect of the present invention is that the present invention provides a wax water paste making machine. By providing a paste making cylinder with an inner and outer layer structure and arranging a cooling cavity between the inner and outer layers, the volume of the coolant storage is greatly reduced, the liquid circulation speed in the cooling cavity is accelerated, thereby improving the circulation efficiency and greatly enhancing the paste making efficiency. Description of the Drawings

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0025] Figure 2 It is a sectional structural schematic diagram of the present invention.

[0026] Figure 3 It is an exploded view of the paste making cylinder of the present invention.

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the inner cylinder of the present invention.

[0028] Figure 5 It is a three-dimensional connection and cooperation diagram of the scraping mechanism and the melting assembly of the present invention.

[0029] Figure 6 This is a schematic cross-sectional view of the melting component of the present invention.

[0030] Figure 7 This is an exploded view of the first funnel and the second funnel of the present invention. Detailed implementation manners

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners: Refer to Figures 1 - 7 , a wax water paste making machine, including a frame; a paste making cylinder 1 is rotatably arranged on the frame, and the paste making cylinder 1 is driven by a motor to rotate. This is the prior art of the paste making machine and will not be elaborated here.

[0032] A scraper 11 matched with the paste making cylinder 1 is arranged on the frame. The end of the scraper 11 contacts or is close to the surface of the wall of the paste making cylinder 1 to scrape off the wax paste on the cylinder wall, thereby realizing the production of paste sheets.

[0033] A blanking component 12 connected with the scraper 11 is arranged on the frame. The blanking component 12 includes a blanking groove 13. A fluid passes through the blanking groove 13, and the fluid continuously passes through the inner cavity of the blanking groove 13, so that the surface of the blanking groove 13 is always at a constant temperature; an injection port 14 and a discharge port 15 for fluid circulation are arranged on the blanking groove 13. The fluid is injected into the blanking groove 13 through the injection port 14 and discharged through the discharge port 15 to realize the circulation of the fluid in the blanking groove 13. Thus, the blanking groove 13 realizes constant temperature through the circulation of the internal fluid. After the wax flakes scraped off by the scraper 11 fall into the blanking groove 13, since the surface of the blanking groove 13 is always at a constant temperature, the wax flakes will not melt and adhere after contacting the blanking groove 13; preferably, the fluid adopts constant temperature ice water, and its temperature is the same as or close to the temperature of the scraped wax flakes.

[0034] A wax liquid pool 2 is arranged on the frame. The wax liquid pool 2 is arranged below the paste making cylinder 1 and contains wax liquid. Specifically, a heating pipe is arranged in the wax liquid pool 2, and the wax liquid is heated by the heating pipe and is always in a liquid state in the wax liquid pool 2; the lower part of the surface of the paste making cylinder 1 contacts the wax liquid in the wax liquid pool 2. When the outer surface of the paste making cylinder 1 is continuously cooled and rotates driven by the motor, the liquid wax in the wax liquid pool 2 can be quickly solidified and adhered to the outer surface of the paste making cylinder 1, and then the wax paste on the surface is scraped off by the scraper equipped with the paste making machine to obtain paste-like wax blocks, wax flakes or wax grains.

[0035] The paste-making cylinder 1 includes an outer cylinder 101 and an inner cylinder 102. The outer cylinder 101 includes an outer cylinder body 1011 and first end plates 1012 symmetrically provided at both ends of the outer cylinder body 1011. Rotating shafts 1013 that cooperate with the frame are fixedly provided on the two first end plates 1012 at both ends. The outer cylinder 101 is rotatably arranged on the frame through the rotating shafts 1013, and one of the rotating shafts 1013 is connected to a motor. Bearings that cooperate with the rotating shafts 1013 are provided on the frame. After the outer cylinder 101 is welded to the first end plates 1012 at both ends, an integral cylinder body is formed.

[0036] The inner cylinder 102 is disposed inside the outer cylinder 101. Specifically, the inner cylinder 102 includes an inner cylinder body 1021 and second end plates 1022 symmetrically provided at both ends of the inner cylinder body 1021. The second end plates 1022 at both ends of the inner cylinder body 1021 are connected to the inner wall of the outer cylinder body 1011 through a plurality of support plates 1023. As Figures 3 - 4 shown, preferably 4 support plates 1023 are evenly arranged around the circumference. The specific number can also be adaptively adjusted according to the size of the cylinder body, so as to realize the stable fixed connection between the inner cylinder 102 and the outer cylinder 101. After the inner cylinder 102 is placed inside the outer cylinder 101, through the support of the support plates 1023, a cooling cavity 103 for fluid circulation is formed between the outer cylinder 101 and the inner cylinder 102. When cooling liquid passes through the cooling cavity 103, the outer surface of the outer cylinder body 1011 of the outer cylinder 101 is cooled. When the outer surface of the paste-making cylinder 1 rotates and contacts the wax liquid in the wax liquid pool 2, the wax liquid is quickly solidified on the outer surface of the outer cylinder 101 to form wax paste.

[0037] The cooling cavity 103 includes a first cavity 1031 formed between the inner cylinder body 1021 and the outer cylinder body 1011 and a second cavity 1032 formed between the first end plate 1012 and the second end plate 1022; the first cavity 1031 and the second cavity 1032 are communicated to form an integral cooling cavity 103, and the cooling liquid can fill the entire cooling cavity 103.

[0038] A second hole body 7 is provided at the center of the inner cylinder 102. The second hole body 7 includes a hole wall that penetrates through the inner cylinder 102, so that the inner cylinder 102 forms a hollow cylinder; that is, a hollow cylinder is formed by the hole wall of the second hole body 7, the second end plates 1022 on both sides and the inner cylinder body 1021, reducing the overall mass of the inner cylinder 102. The second hole body 7 is communicated with the cooling cavity 103; a liquid injection pipe 3 and a return pipe 4 that are connected to the cooling cavity 103 are provided on the frame. The liquid injection pipe 3 is connected to a pump body 5, and cooling liquid is injected into the cooling cavity 103 through the liquid injection pipe 3, and the liquid after the cooling liquid absorbs the heat of the outer surface of the paste-making cylinder 1 is returned through the return pipe 4. At the same time, new cooling liquid is supplemented, and a reciprocating cycle is carried out to continuously supplement a constant-temperature cooling liquid in the cooling cavity and improve the quality of paste-making.

[0039] AsFigure 2 As shown, a first hole body 6 cooperating with the liquid injection pipe 3 and the return pipe 4 is provided on the rotating shaft 1013 on either side of the outer cylinder body 1011. Specifically, in this embodiment, the liquid injection pipe 3 is arranged on the left side of the paste making cylinder 1. The liquid injection pipe 3 sequentially penetrates through the first hole body 6 and the second hole body 7 from left to right and is placed at the right end outlet of the second hole body 7, so as to discharge the coolant discharged from the liquid injection pipe 3 into the second cavity 1032 on the right side.

[0040] A return cavity 601 is formed between the outer wall of the liquid injection pipe 3 and the inner wall of the first hole body 6. The return pipe 4 is connected to the return cavity 601. Specifically, the rotating shaft 1013 on the side where the first hole body 6 is provided is connected with a rotary joint 8. The rotary joint 8 includes a liquid injection hole 801 connected to the liquid injection pipe 3 and a return hole 802 connected to the return pipe 4; the end of the rotary joint 8 is rotatably connected to the rotating shaft 1013, and the main body of the rotary joint 8 can be fixed on the machine frame. When the rotating shaft 1013 is driven by a motor to rotate, it also rotates relative to the rotary joint 8; a connecting cavity 803 communicating with the return cavity 601 is provided therein, the return hole 802 communicates with the connecting cavity 803, and the return cavity 601 communicates with the cooling cavity 103, so that the liquid in the cooling cavity 103 can flow back into the return pipe 4 through the return hole 802.

[0041] The port of the liquid injection pipe 3 at the right end injects the coolant into the second cavity 1032 on the right side. When the coolant flows under pressure, it flows back to the left through the first cavity 1031, and flows back through the return cavity 601 and the connecting cavity 803 and then through the return pipe 4, realizing the circulation of the coolant.

[0042] In this embodiment, the coolant preferably adopts ice water. Heat insulation plates 9 for preventing the formation of condensed water are provided on the end faces of the first end plates 1012 on both sides of the outer cylinder 101 away from the cylinder body of the outer cylinder 101. The heat insulation plates 9 are made of non-metallic plates and have functions such as heat preservation and heat insulation, so as to prevent condensed water from forming on both sides of the outer cylinder 101 and flowing into the wax liquid pool 2, realizing the protection of the wax liquid pool 2.

[0043] In this embodiment, a pneumatic three-way valve 10 is provided between the pump body 5 and the liquid injection pipe 3. The pneumatic three-way valve 10 controls the time for injecting ice water into the liquid injection pipe 3, thereby reducing the frequent start of the ice water machine and realizing the precise control of the ice water injection time.

[0044] In the present embodiment, wax paste adheres to the side wall of the paste making tube 1 after rotation. In order to scrape off the wax paste in real time and better integrate it into the wax liquid pool 2, the present embodiment has scraping mechanisms symmetrically arranged on both sides of the paste making tube 1 for scraping off the wax paste and melting the wax paste in a centralized manner. The scraping mechanism includes a side scraper 21. The side wall on one side of the side scraper 21 is arranged to fit the side wall of the paste making tube 1, and the side scraper 21 is inclined downward relative to the horizontal plane of the wax liquid pool 2. The side scraper 21 is provided with a material guide port 22 inclined downward.

[0045] The side scraper 21 is arranged on the upper part of the scraper 11. Figure 5 As shown, when the paste tube 1 is along Figure 5 As shown, when the paste tube 1 rotates clockwise, that is, rotates toward the scraper 11 , the side wall of the paste tube 1 contacts the side scraper 21 , and the wax paste adhering to the side wall of the paste tube 1 is scraped off and poured out through the material guide port 22 .

[0046] The wax liquid pool 2 is provided with a melting component connected to the material guide port 22. Specifically, the melting component includes a receiving hopper 31 connected to the side scraper 21. The receiving hopper 31 is connected to a first funnel 33 through a material guide pipe 32. Figure 7 As shown, the lower end of the guide tube 32 is placed in the first funnel 33 and is provided with a plurality of discharge ports 34. The side wall of the first funnel 33 is provided with a plurality of first discharge slots 35. The side scraper 21 stores the wax paste scraped off the paste tube 1 through the receiving hopper 31, and then transports it to the discharge port 34 through the guide tube 32. Then, the wax paste enters the first funnel 33 through the discharge port 34.

[0047] The first funnel 33 is placed below the wax surface of the wax pool 2, that is, at the bottom of the wax pool 2; in order to achieve better and effective transmission of the wax paste to the first funnel 33 at the bottom and achieve efficient melting, an auger blade 36 is arranged on the inner wall of the guide tube 32 in this embodiment, and a second funnel 41 matched with the first funnel 33 is fixed at the bottom of the wax pool 2, and an auger shaft 42 extending vertically upward is arranged at the center of the second funnel 41, and the auger shaft 42 is passed through the center of the auger blade 36, and the first funnel 33, the guide tube 32 and the receiving hopper 31 are rotatably arranged on the auger shaft 42, that is, the inner wall of the auger blade 36 is in contact with and fits with the auger shaft 42 and is rotatably arranged.

[0048] The second funnel 41 is sleeved at the bottom of the first funnel 33, and its inner wall fits against the outer wall of the first funnel 33. The first funnel 33 and the second funnel 41 are in a "cup"-shaped stacked state; a plurality of second discharge grooves 43 are formed on the outer wall of the second funnel 41. The second discharge grooves 43 are evenly arranged in the circumferential direction and have the same number as the first discharge grooves 35 on the first funnel 33. When the first funnel 33 rotates relative to the second funnel 41, the auger blade 36 can gradually convey the wax paste in the receiving hopper 31 downward to the bottom of the first funnel 33 and discharge it from the discharge port 34. Subsequently, the discharged wax paste melts at the bottom of the wax liquid pool and is incorporated into the wax liquid in the wax liquid pool through the gap when the first funnel 33 and the second funnel 41 rotate relative to each other, realizing the uniform melting and incorporation of the wax paste.

[0049] A driving motor 51 for driving the first funnel 33 to rotate is provided on the frame. The driving motor 51 is a hollow rotary motor and rotates through a servo motor. Specifically, the guide pipe 32 above the first funnel 33 passes through the hollow part of the driving motor 51 and is fixed to the hollow platform. After the servo motor is started, it drives the guide pipe 32 to rotate, thereby realizing the rotation of the first funnel 33 relative to the second funnel 41.

[0050] A detection component for detecting the wax liquid damping at the discharge port 34 of the first funnel 33 is provided in the first funnel 33. The detection component includes a fixing plate 52 fixed to the frame and a detection rod 53 slidably arranged on the fixing plate 52. The lower end of the detection rod 53 is placed in the first funnel 33, and a damping block 54 is arranged at its end. The upper end slidably passes through the fixing plate 52 and is provided with an induction block 55. A driving block 56 is fixedly arranged above the induction block 55; the lower end surface of the damping block 54 is a spherical surface or an arc surface. When the driving block 56 is pressed down, the damping block 54 slides downward in the wax liquid in the wax liquid pool, and the greater the resistance between it and the wax liquid, the greater the pressure sensed by the induction block 55; the induction block 55 is a piezoresistor or a pressure sensor.

[0051] A return spring 57 is arranged between the upper end of the detection rod 53 and the fixing plate 52, and it can reset the detection rod 53 after the driving block 56 presses down to complete the detection.

[0052] A motor plate 58 for installing the driving motor 51 is provided on the guide pipe 32. A contact block 59 for pressing down the driving block 56 is provided on the motor plate 58. When the motor plate 58 is driven by the driving motor 51 to rotate, the contact block 59 rotates to contact and press against the driving block 56 after turning, so as to make the driving block 56 slide downward. Preferably, the upper end surface of the driving block 56 is a spherical surface, and the lower end surface of the contact block 59 can be a spherical surface or an arc surface that makes a transitional contact with the upper end surface of the driving block 56.

[0053] The induction block 55 is connected to the drive motor 51 through a PLC controller. The induction block 55 can reduce the rotation speed of the drive motor 51 by sensing an increase in pressure, so that the feeding speed of the auger blade 36 decreases. That is, when there is more wax paste in the first funnel 33, the resistance of the wax liquid at its discharge port 34 will increase, which is sensed by the induction block 55 as an increase in pressure. At this time, the melting speed of the wax paste in the first funnel 33 is slower, and the feeding of the wax paste needs to be slowed down. Thus, the pressure signal is transmitted to the drive motor 51 through the PLC, and the rotation speed of the drive motor 51 is correspondingly reduced, that is, the rotation speed of the auger blade 36 is reduced.

[0054] A method of using a wax water paste making machine as described above: When in use, ice water or other replaceable cooling liquid is injected into the right second cavity 1032 through the pump body 5 and the liquid injection pipe 3. Subsequently, the liquid flows to the first cavity 1031 through pressure, cools the outer surface wall of the paste making cylinder 1, realizes the cooling of its outer surface, and returns through the return cavity 601 and the connection cavity 803 and then through the return pipe 4 to realize the circulation of the cooling liquid;

[0055] After the paste making cylinder 1 is cooled by the cooling liquid, when its rotating cylinder surface passes through the wax liquid pool 2, the wax liquid in contact with its surface is quickly cooled and solidified, and wax paste adheres to the surface. When the wax paste in this part rotates to the position of the scraper, the wax paste is scraped off by the scraper, thereby making paste-like wax sheets, wax blocks or wax grains.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wax water paste making machine, characterized in that: include frame; The paste making cylinder (1) is rotatably mounted on a frame and, after contacting the wax liquid, cools the wax liquid into a paste-like state and adheres to its surface; as well as A wax liquid pool (2) containing wax liquid; Part of the surface of the paste-making cylinder (1) is in contact with the wax liquid in the wax liquid pool (2); The paste-making cylinder (1) comprises an outer cylinder (101) and an inner cylinder (102), wherein a cooling cavity (103) for fluid circulation is formed between the outer cylinder (101) and the inner cylinder (102); The paste-making cylinder (1) is symmetrically provided with scraping mechanisms for scraping off the wax paste and centrally melting the wax paste, the scraping mechanisms comprising side scrapers (21); a melting component is provided in the wax liquid pool (2), the melting component comprising a receiving hopper (31) docked with the side scrapers (21); The receiving hopper (31) is connected to a first funnel (33) via a material guide pipe (32); a plurality of discharge ports (34) are provided at the lower end of the material guide pipe (32); and a plurality of first discharge slots (35) are provided on the side wall of the first funnel (33); An auger blade (36) is provided on the inner tube wall of the material guide tube (32), and a second funnel (41) matching with the first funnel (33) is fixedly provided at the bottom of the wax liquid pool (2); The frame is provided with a driving motor (51) for driving the first funnel (33) to rotate; the servo motor is started to realize the rotation of the first funnel (33) relative to the second funnel (41); A detection assembly is provided in the first funnel (33), the detection assembly comprising a detection rod (53), a damping block (54) being provided at the lower end thereof, a sensing block (55) being provided at the upper end thereof, and a driving block (56) being fixedly provided above the sensing block (55); The material guide tube (32) is provided with a motor plate (58), and the motor plate (58) is provided with a contact block (59) for pressing the driving block (56) downward; The induction block (55) is connected to the drive motor (51) via a PLC controller.

2. A wax water paste making machine according to claim 1, characterized in that: The outer cylinder (101) comprises an outer cylinder body (1011) and first end plates (1012) symmetrically arranged at two ends of the outer cylinder body (1011); a rotating shaft (1013) matching with the frame is arranged on the first end plate (1012).

3. A wax water ointment making machine according to claim 2, characterized in that: The inner cylinder (102) comprises an inner cylinder body (1021) and second end plates (1022) symmetrically arranged at two ends of the inner cylinder body (1021); the inner cylinder body (1021) is connected to the inner wall of the outer cylinder body (1011) via a plurality of support plates (1023).

4. A wax water paste making machine according to claim 3, characterized in that: The cooling cavity (103) comprises a first cavity (1031) formed between the inner cylinder (1021) and the outer cylinder (1011), and a second cavity (1032) formed between the first end plate (1012) and the second end plate (1022); The first cavity (1031) is connected to the second cavity (1032).

5. A wax water paste making machine according to any one of claims 1 to 4, characterized in that: The frame is provided with a liquid injection pipe (3) and a return pipe (4) connected to the cooling chamber (103); the liquid injection pipe (3) is connected to the pump body (5).

6. A wax water paste making machine according to claim 1, characterized in that: A first hole (6) matching with the injection pipe (3) and the return pipe (4) is provided on the rotating shaft (1013) on any side of the outer cylinder (1011), a second hole (7) is provided at the center of the inner cylinder (1021), and the injection pipe (3) passes through the first hole (6) and the second hole (7) in sequence.

7. A wax water paste making machine according to claim 6, characterized in that: A reflux chamber (601) is formed between the outer wall of the injection tube (3) and the inner wall of the first hole body (6), and the reflux tube (4) is connected to the reflux chamber (601).

8. A wax water paste making machine according to claim 7, characterized in that: The rotating shaft (1013) provided on one side of the first hole body (6) is connected to a rotating joint (8), and the rotating joint (8) comprises an injection hole (801) connected to the injection pipe (3) and a reflux hole (802) connected to the reflux pipe (4).

9. A wax water paste making machine according to claim 8, characterized in that: The end of the rotary joint (8) is rotatably connected to the rotating shaft (1013), and a connecting cavity (803) which is in communication with the reflux cavity (601) is provided therein.

10. A wax water paste making machine according to claim 1, characterized in that: Protective plates (9) for preventing the formation of condensed water are provided on both sides of the outer cylinder (101).

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