Anti-condensation shield pump

Abstract

The utility model relates to an anti-condensation shield pump, which solves the problems of high cost of anti-condensation technical means or ununderstanding of anti-condensation effect and the like in the prior art, and adopts the technical scheme that a shielding sleeve is arranged in a motor, an inner cavity of the shielding sleeve is provided with a medium circulation channel, and a second end of the motor is provided with an anti-condensation structure; the medium circulation channel is in medium contact fit with the inner wall of the anti-condensation structure, and the outer wall of the anti-condensation structure is matched with a heating component in the controller. The controller has the advantages that the added condensation prevention structure is used for receiving heat transmitted by electronic components on the controller and transmitting the heat to flowing media, the heat is taken away by the flowing media, the temperature difference between the internal temperature of the controller and the fluid media is reduced, the possibility of generating condensate water is reduced, and the service life of the controller is prolonged. And condensate water generated accidentally can be guided to flow out from the interior of the controller, and accumulation of the condensate water is prevented, so that the working stability of the controller is improved, and the condition that components in the controller are burnt down is prevented.

Description

Technical Field

[0001] The utility model relates to the field of liquid pumping devices, in particular to an anti-condensation shielded pump. Background Art

[0002] When the medium is running at a relatively low temperature or normal temperature (the medium is not limited to water, but can also be other chemical fluid media, "lower temperature or normal temperature" is a relative concept. Since the controller often generates heat when working, the temperature rises. When the temperature difference between the medium and the controller is greater than or equal to 10 degrees, condensation water is easily generated), the medium flowing inside the electronic shielding pump is often used to dissipate the heat of the controller. This heat dissipation method is energy-saving and has a good heat dissipation effect. However, the medium temperature is low, and the controller generates heat when it is running, which provides good conditions for condensation water. If this problem needs to be solved, there are generally two methods. One method is to avoid the generation of condensation water. Usually, the controller is wrapped with a shell, the protection level is improved, and the internal air humidity is reduced, so as to achieve the purpose of avoiding the generation of condensation water. However, this method often has the problem of high cost; the other method is to guide the condensation water out. This method is not perfect in practical applications. It is difficult to guide the condensation water out smoothly. It is easy to accumulate inside the controller and affect the working stability of the controller, and even the internal components of the controller are burned. Summary of the invention

[0003] The purpose of the utility model is to solve the above-mentioned problems existing in the prior art and to provide an anti-condensation shielded pump. An anti-condensation structure is added between the motor and the controller. The anti-condensation structure is used to receive the heat transferred from the electronic components on the controller and transfer it to the flowing medium, and the flowing medium takes away the heat, thereby reducing the temperature difference between the internal temperature of the controller and the fluid medium, reducing the possibility of condensation water generation, and can guide the accidentally generated condensation water to flow out from the inside of the controller to prevent the accumulation of condensation water, thereby improving the working stability of the controller and preventing the burning of the internal components of the controller.

[0004] The above technical purpose of the utility model is mainly solved by the following technical solutions: an anti-condensation shielded pump, comprising a motor, a pump body arranged at the first end of the motor, and a controller arranged at the second end of the motor, a shielding sleeve is provided in the motor, and the inner cavity of the shielding sleeve has a medium circulation channel, characterized in that an anti-condensation structure is provided at the second end of the motor, the medium circulation channel is matched with the inner wall of the anti-condensation structure in a medium contact manner, and the outer wall of the anti-condensation structure is matched with the heating components in the controller, so as to enable the medium in the shielding sleeve to take away the heat transferred from the heating components to the anti-condensation structure. This technical solution adds an anti-condensation structure between the motor and the controller. The outer surface of the anti-condensation structure contacts and receives the electronic components on the controller, so that the heat generated by the electronic components (especially the driver board, which generates more heat) is carried away by the flowing medium through the anti-condensation structure, which is beneficial to reducing the temperature difference between the internal temperature of the controller and the fluid medium, and can effectively control the temperature difference within 10°C, reducing the possibility of condensation water generation. At the same time, the anti-condensation structure can guide the accidentally generated condensation water to flow out from the inside of the controller to prevent the accumulation of condensation water, thereby improving the working stability of the controller and preventing the burning of internal components of the controller.

[0005] As a further improvement and supplement to the above technical solution, the utility model adopts the following technical measures: the material of the anti-condensation structure is a good thermal conductor material, and a first boss is arranged on the outer surface of the anti-condensation structure, and the first boss is used to fit with the surface of the heat-generating component in the controller to improve the heat transfer rate. The material of the anti-condensation structure can be metal, ceramic or other non-metallic material with good thermal conductivity. The metal material is preferably aluminum or copper. In order to improve the corrosion resistance of the anti-condensation structure, copper is preferred. Providing a first boss on the outer surface of the anti-condensation structure is conducive to smoothly fitting the heat-generating components and improving the thermal conductivity, and can also reduce the overall thickness of the anti-condensation structure, which is conducive to reducing the weight and consumption of materials.

[0006] Preferably, the first boss is rectangular, and is tilted from bottom to top on a vertical plane when the shielded pump is in use. The angle between the length direction of the first boss and the vertical direction is a, and 30°≤a≤60°. The tilted arrangement of the first boss is conducive to guiding condensed water to flow downward along the first boss, thereby helping to avoid the accumulation of condensed water inside the controller.

[0007] Preferably, there is an arc transition between the first boss and the outer surface of the anti-condensation structure, the bending direction of the arc transition portion is away from the first boss, the thickness of the main part of the anti-condensation structure is h, the distance from the edge of the first boss to the far edge of the corresponding arc transition portion is c, and h>c. The provision of the arc transition portion is conducive to the condensed water on the first boss sliding down along the first boss under its own gravity and guiding the condensed water to the outer surface of the anti-condensation structure through the arc transition portion, thereby smoothly guiding the condensed water out, avoiding the condensed water from rebounding and splashing when dripping and getting on the components of the controller, which is further conducive to keeping the working environment of the components suitable for the work of the components.

[0008] Preferably, the inner surface of the anti-condensation structure is provided with a second groove recessed outward, the second groove is provided corresponding to the first boss, and the second groove is matched with the inlet of the central axial flow channel of the motor shaft. The provision of the second groove is conducive to reducing the thickness of the anti-condensation structure corresponding to the first boss, so that the first boss has a suitable thickness, and the provision of the second groove is conducive to filling more medium, thereby facilitating the cooling of the medium to the part corresponding to the first boss, and facilitating the cooling effect on the heat-generating components, thereby achieving the purpose of preventing or significantly reducing the generation of condensed water.

[0009] Preferably, a flow expansion port is provided at the end of the motor shaft, and the flow expansion port is provided at the outer end of the inlet of the central axial flow channel, and the flow expansion port is provided corresponding to the second groove, and the shape of the flow expansion port is adapted to the shape of the second groove. The provision of the flow expansion port is, on the one hand, conducive to guiding the medium to flow from the medium flow channel into the central axial flow channel, and then flow from the central axial flow channel to the water outlet of the pump body to pump out the medium; on the other hand, it is conducive to making the corresponding part of the second groove have a larger volume to accommodate the medium, which is conducive to improving the cooling of the heat-generating components through the first boss.

[0010] Preferably, a first specific scheme of the anti-condensation structure is: the anti-condensation structure is an integrated end cover structure, the outer edge of the anti-condensation structure is pressed and fitted with the outer casing of the motor, the middle area of ​​the inner surface of the anti-condensation structure seals the opening on the shielding sleeve, and the medium flow channel is matched with the middle area of ​​the inner surface of the anti-condensation structure.

[0011] As a preferred embodiment, the second specific scheme of the anti-condensation structure is as follows: the anti-condensation structure includes a first anti-condensation cover and a second anti-condensation cover, the outer surface of the first anti-condensation cover is provided with a first boss, the inner surface of the first anti-condensation cover is provided with a first groove corresponding to the first boss, the outer surface of the second anti-condensation cover is provided with a second boss, the inner surface of the second anti-condensation cover is provided with a second groove corresponding to the second boss, the size of the second boss is adapted to the size of the first groove, the second boss is inserted into the first groove, and the outer surface of the second boss is fitted with the inner wall of the first groove. The matching relationship between the second boss and the first groove is conducive to maintaining the limiting relationship between the first anti-condensation cover and the second anti-condensation cover, and is also conducive to ensuring the heat conduction performance of the anti-condensation structure and the formation of anti-condensation water. The anti-condensation structure adopts the form of matching the first anti-condensation cover and the second anti-condensation cover, which is conducive to the first anti-condensation cover and the second anti-condensation cover being made of suitable materials, such as the first anti-condensation cover is made of aluminum and the second anti-condensation cover is made of copper, so that the anti-condensation structure has both corrosion resistance and good heat conductivity, and is also conducive to cost control.

[0012] Preferably, in order to ensure that the anti-condensation structure has good thermal conductivity, the thickness of the main part of the first anti-condensation cover is b, the thickness of the main part of the second anti-condensation cover is a, a / x+b / y>c / y, wherein y is the thermal conductivity of the first anti-condensation cover, and x is the thermal conductivity of the second anti-condensation cover.

[0013] Preferably, the second anti-condensation cover is made of copper. Since the second anti-condensation cover is in direct contact with the medium, the use of copper material is conducive to making the anti-condensation structure have good thermal conductivity and corrosion resistance, which is conducive to controlling costs and improving the service life of the anti-condensation structure, thereby improving the service life of the anti-condensation shielded pump and reducing the probability of downtime for maintenance.

[0014] The utility model has the following beneficial effects: 1. An anti-condensation structure is added between the motor and the controller. The anti-condensation structure is used to receive the heat transferred from the electronic components on the controller and transfer it to the flowing medium, and the flowing medium takes away the heat, thereby reducing the temperature difference between the internal temperature of the controller and the fluid medium, reducing the possibility of condensation water generation, and guiding the accidentally generated condensation water to flow out from the inside of the controller to prevent the accumulation of condensation water, thereby improving the working stability of the controller and preventing the internal components of the controller from burning. 2. The anti-condensation structure can be an integrated structure, which is conducive to production, processing and assembly; it can also include a split structure of a stacked first anti-condensation cover and a second anti-condensation cover, and corresponding suitable materials can be selected, which have good thermal conductivity and corrosion resistance, which is conducive to controlling costs, and is also conducive to increasing the service life of the anti-condensation structure, thereby increasing the service life of the anti-condensation shielded pump, and reducing the probability of downtime for maintenance. 3. Setting a first boss and limiting the first boss to be inclined or the edge of the first boss to be an arc-shaped transition portion or other structures is beneficial to improving the heat dissipation efficiency of the heat-generating components, while also being able to smoothly guide the accidentally generated condensed water out of the control box, which is beneficial to keeping the internal environment of the control box suitable for the operation of various electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0016] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0017] Figure 3 The utility model is a schematic diagram of a structure of a controller, an anti-condensation structure and a motor explosion.

[0018] Figure 4 yes Figure 3 Schematic diagram of the structure from another perspective.

[0019] Figure 5 The utility model is a structural schematic diagram of the anti-condensation structure and the motor.

[0020] In the figure: 1. motor; 2. pump body; 3. impeller; 4. controller housing; 5. shielding sleeve; 6. medium flow channel; 7. anti-condensation structure; 8. heating components; 9. first boss; 10. arc-shaped transition part; 11. second groove; 12. central axial flow channel; 13. expansion port; 14. opening; 15. first anti-condensation cover; 16. second anti-condensation cover; 17. first groove; 18. second boss. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0022] Example 1: Figure 1 and Figure 5 As shown, an anti-condensation shielded pump comprises a motor 1, a pump body 2 arranged at a first end of the motor 1, a controller arranged at a second end of the motor 1 (including a controller housing 4 and a control board arranged in the controller housing 4, a drive board and various electronic components arranged on the control board, the heat generating component 8 involved in this article comprises a drive board and a heat generating electronic component, and the first boss 9 involved in this article is mainly used to cooperate with the drive board and dissipate heat from the drive board), an impeller 3 is arranged in the pump body 2, a shielding sleeve 5 is arranged in the motor 1, the inner cavity of the shielding sleeve 5 has a medium flow channel 6, and the shielding sleeve 5 is provided with a medium inlet toward the first end of the pump body 2, so that the medium in the inner cavity of the pump body 2 flows to the medium inlet through the action of the impeller 3 and enters the medium flow channel 6, and then enters the central axial flow channel 12 in the rotating shaft of the motor 1, and the outlet of the central axial flow channel 12 is connected with the outlet of the pump body 2, so that the medium is pumped out through the outlet of the pump body 2.

[0023] The main improvements of the present technical solution are: an anti-condensation structure 7 is provided at the second end of the motor 1, the medium flow channel 6 cooperates with the inner wall of the anti-condensation structure 7 in a medium contact manner, and the outer wall of the anti-condensation structure 7 cooperates with the heating component 8 in the controller, so as to enable the medium in the shielding sleeve 5 to take away the heat transferred to the anti-condensation structure 7 by the heating component 8.

[0024] Specifically, the technical solution adds an anti-condensation structure 7 between the motor 1 and the controller. The outer surface of the anti-condensation structure 7 contacts and receives the electronic components on the controller, so that the heat generated by the electronic components (especially the driving board, which generates more heat) is carried away by the flowing medium through the anti-condensation structure 7, which is beneficial to reduce the temperature difference between the internal temperature of the controller and the fluid medium, and can effectively control the temperature difference within 10°C, reducing the possibility of condensation water generation. At the same time, the anti-condensation structure 7 can guide the accidentally generated condensation water to flow out from the inside of the controller to prevent the accumulation of condensation water, thereby improving the working stability of the controller and preventing the burning of internal components of the controller.

[0025] In practical applications, in order to increase the heat conduction efficiency, a layered structure such as a thermal conductive adhesive may be coated on the contact portion between the anti-condensation structure 7 and the electronic components.

[0026] In practical applications, the material of the anti-condensation structure 7 is a good thermal conductor material, and a first boss 9 is provided on the outer surface of the anti-condensation structure 7. The first boss 9 is used to fit with the surface of the heat-generating component 8 in the controller to improve the heat transfer rate. The material of the anti-condensation structure 7 can be metal, ceramic or other non-metallic material with good thermal conductivity. The metal material is preferably aluminum or copper. In order to improve the corrosion resistance of the anti-condensation structure 7, copper is preferred. Providing the first boss 9 on the outer surface of the anti-condensation structure 7 is conducive to smoothly fitting the heat-generating components and improving the thermal conductivity, and can also reduce the overall thickness of the anti-condensation structure 7, which is conducive to reducing the weight and consumption of materials.

[0027] In practical applications, the first boss 9 is rectangular, and is tilted from bottom to top on a vertical plane when the shielded pump is in use. The angle between the length direction of the first boss 9 and the vertical direction is a, 30°≤a≤60°, and a can be any angle between 30° and 60°. The tilted setting of the first boss 9 is conducive to guiding the condensed water to flow downward along the first boss 9, thereby helping to avoid the accumulation of condensed water inside the controller.

[0028] In practical applications, the first boss 9 and the outer surface of the anti-condensation structure 7 have an arc transition, the bending direction of the arc transition portion 10 is away from the first boss 9, and the thickness of the main part of the anti-condensation structure 7 is h (h is equivalent to Figure 2 a+b in the figure), the distance from the edge of the first boss 9 to the far edge of the corresponding arc transition portion 10 is c (the surface distance (non-linear distance) between the high temperature area on the anti-condensation structure 7 and its farthest point is similar to the creepage distance. Heat is conducted along the heat-conducting object. If the heat-conducting object is a curved surface, the surface distance is a curve, or even a spatial curve, that is, this distance is the shortest distance on the object), h>c. The setting of the arc transition is conducive to the condensed water on the first boss 9 sliding down along the first boss 9 under its own gravity and guiding the condensed water to the outer surface of the anti-condensation structure 7 through the arc transition portion 10, so that the condensed water is smoothly discharged, and the condensed water is prevented from rebounding and splashing when dripping and getting on the components of the controller, which is further conducive to keeping the working environment of the components suitable for the work of the components.

[0029] In practical applications, the inner surface of the anti-condensation structure 7 is provided with a second groove 11 that is recessed outward, and the second groove 11 is provided corresponding to the first boss 9, and the second groove 11 is provided corresponding to the inlet of the central axial flow channel 12 of the rotating shaft of the motor 1. The provision of the second groove 11 is conducive to reducing the thickness of the portion of the anti-condensation structure 7 corresponding to the first boss 9, so that the portion of the first boss 9 has a suitable thickness, and the provision of the second groove 11 is conducive to filling more medium, thereby facilitating the cooling and temperature reduction of the portion corresponding to the first boss 9 by the medium, and facilitating the cooling effect on the heat-generating component 8, thereby achieving the purpose of preventing or significantly reducing the generation of condensed water.

[0030] In practical applications, controlling the diameter d of the central axial flow channel 12 can limit the flow rate in the shielding sleeve 5. If the medium temperature is high, the size of d can be appropriately increased to increase the flow rate in the shielding sleeve 5 and accelerate the cooling of the anti-condensation structure 7.

[0031] In practical applications, a flow expansion port 13 is provided at the end of the rotating shaft of the motor 1, and the flow expansion port 13 is provided at the outer end of the inlet of the central axial flow channel 12. The flow expansion port 13 is provided corresponding to the second groove 11, and the shape of the flow expansion port 13 is adapted to the shape of the second groove 11. The provision of the flow expansion port 13 is, on the one hand, conducive to guiding the medium to flow from the medium flow channel 6 into the central axial flow channel 12, and then flow from the central axial flow channel 12 to the water outlet of the pump body 2 to pump out the medium; on the other hand, it is conducive to making the corresponding part of the second groove 11 have a larger volume to accommodate the medium, which is conducive to improving the cooling of the heat-generating component 8 through the first boss 9.

[0032] In actual applications, the anti-condensation structure 7 is an integrated end cover structure, the outer edge of the anti-condensation structure 7 is pressed and fitted with the outer casing of the motor 1, the middle area of ​​the inner surface of the anti-condensation structure 7 seals the opening 14 on the shielding sleeve 5, and the medium flow channel 6 is matched with the middle area of ​​the inner surface of the anti-condensation structure 7.

[0033] Example 2: Figure 1-Figure 5As shown, the difference from Example 1 is that the anti-condensation structure 7 includes a first anti-condensation cover 15 and a second anti-condensation cover 16, the outer surface of the first anti-condensation cover 15 is provided with a first boss 9, the inner surface of the first anti-condensation cover 15 is provided with a first groove 17 corresponding to the first boss 9, the outer surface of the second anti-condensation cover 16 is provided with a second boss 18, the inner surface of the second anti-condensation cover 16 is provided with a second groove 11 corresponding to the second boss 18, the size of the second boss 18 is adapted to the size of the first groove 17, the second boss 18 is inserted into the first groove 17, and the outer surface of the second boss 18 is in contact with the inner wall of the first groove 17. The matching relationship between the second boss 18 and the first groove 17 is conducive to maintaining the limiting relationship between the first anti-condensation cover 15 and the second anti-condensation cover 16, and is conducive to ensuring the thermal conductivity of the anti-condensation structure 7 and preventing the formation of condensation water. The anti-condensation structure 7 adopts the form of a first anti-condensation cover 15 and a second anti-condensation cover 16 that cooperate with each other, which is beneficial for the first anti-condensation cover 15 and the second anti-condensation cover 16 to be made of suitable materials respectively. For example, the first anti-condensation cover 15 is made of aluminum and the second anti-condensation cover 16 is made of copper, so that the anti-condensation structure 7 has both corrosion resistance and good thermal conductivity, and is also beneficial for cost control.

[0034] In practical applications, in order to ensure that the anti-condensation structure 7 has good thermal conductivity, the thickness of the main part of the first anti-condensation cover 15 is b, and the thickness of the main part of the second anti-condensation cover 16 is a, a / x+b / y>c / y, wherein y is the thermal conductivity of the first anti-condensation cover 15, and x is the thermal conductivity of the second anti-condensation cover 16.

[0035] In practical applications, the material of the second anti-condensation cover 16 is copper. Since the second anti-condensation cover 16 is in direct contact with the medium, the use of copper material is conducive to making the anti-condensation structure 7 have good thermal conductivity and corrosion resistance, which is conducive to controlling costs and improving the service life of the anti-condensation structure 7, thereby improving the service life of the anti-condensation shielded pump and reducing the probability of downtime for maintenance.

[0036] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. In the above embodiments, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An anti-condensation shielded pump, comprising a motor (1), a pump body (2) arranged at a first end of the motor (1), and a controller arranged at a second end of the motor (1), wherein a shielding sleeve (5) is arranged inside the motor (1), and an inner cavity of the shielding sleeve (5) has a medium flow channel (6), characterized in that An anti-condensation structure (7) is provided at the second end of the motor (1); the medium flow channel (6) cooperates with the inner wall of the anti-condensation structure (7) in a medium contact manner; the outer wall of the anti-condensation structure (7) cooperates with the heating component (8) in the controller, so as to enable the medium in the shielding sleeve (5) to take away the heat transferred from the heating component (8) to the anti-condensation structure (7).

2. The anti-condensation shielded pump according to claim 1, characterized in that The material of the anti-condensation structure (7) is a material with good thermal conductivity. A first boss (9) is provided on the outer surface of the anti-condensation structure (7). The first boss (9) is used to fit with the surface of the heat-generating component (8) in the controller to improve the heat transfer rate.

3. The anti-condensation shielded pump according to claim 2, characterized in that The first boss (9) is rectangular and is arranged obliquely from bottom to top on a vertical plane when the canned pump is in use. The angle between the length direction of the first boss (9) and the vertical direction is a, and 30°≤a≤60°.

4. The anti-condensation shielded pump according to claim 3, characterized in that An arc-shaped transition is formed between the first boss (9) and the outer surface of the anti-condensation structure (7), the bending direction of the arc-shaped transition portion (10) is away from the first boss (9), the thickness of the main part of the anti-condensation structure (7) is h, and the distance from the edge of the first boss (9) to the far edge of the corresponding arc-shaped transition portion (10) is c, and h>c.

5. The anti-condensation shielded pump according to claim 4, characterized in that The inner surface of the anti-condensation structure (7) is provided with a second groove (11) recessed outward, the second groove (11) is provided corresponding to the first boss (9), and the second groove (11) is matched correspondingly with the inlet of the central axial flow channel (12) of the rotating shaft of the motor (1).

6. The anti-condensation shielded pump according to claim 5, characterized in that A flow expansion port (13) is provided at the end of the rotating shaft of the motor (1), and the flow expansion port (13) is provided at the outer end of the inlet of the central axial flow channel (12). The flow expansion port (13) is provided corresponding to the second groove (11), and the shape of the flow expansion port (13) is adapted to the shape of the second groove (11).

7. The anti-condensation shielded pump according to any one of claims 4 to 6, characterized in that The anti-condensation structure (7) is an integrated end cover structure, the outer edge of the anti-condensation structure (7) is pressed against the outer shell of the motor (1), the middle area of ​​the inner surface of the anti-condensation structure (7) seals the opening (14) on the shielding sleeve (5), and the medium flow channel (6) is matched with the middle area of ​​the inner surface of the anti-condensation structure (7).

8. The anti-condensation shielded pump according to any one of claims 4 to 6, characterized in that The anti-condensation structure (7) comprises a first anti-condensation cover (15) and a second anti-condensation cover (16); a first boss (9) is arranged on the outer surface of the first anti-condensation cover (15); a first groove (17) corresponding to the first boss (9) is arranged on the inner surface of the first anti-condensation cover (15); a second boss (18) is arranged on the outer surface of the second anti-condensation cover (16); a second groove (11) corresponding to the second boss (18) is arranged on the inner surface of the second anti-condensation cover (16); the size of the second boss (18) matches the size of the first groove (17); the second boss (18) is inserted into the first groove (17); and the outer surface of the second boss (18) is in contact with the inner wall of the first groove (17).

9. The anti-condensation shielded pump according to claim 8, characterized in that The thickness of the main part of the first anti-condensation cover (15) is b, and the thickness of the main part of the second anti-condensation cover (16) is a, a / x+b / y>c / y, wherein y is the thermal conductivity of the first anti-condensation cover (15), and x is the thermal conductivity of the second anti-condensation cover (16).

10. The anti-condensation shielded pump according to claim 8, characterized in that The second anti-condensation cover (16) is made of copper.

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