CN113028638A

CN113028638A - Friction head and boiler comprising same

Info

Publication number: CN113028638A
Application number: CN201911409163.4A
Authority: CN
Inventors: 崔成国
Original assignee: CHOI SUNG KOOK
Current assignee: CHOI SUNG KOOK
Priority date: 2019-12-24
Filing date: 2019-12-31
Publication date: 2021-06-25
Also published as: KR20210081818A; KR102339399B1

Abstract

The present invention relates to a friction head capable of improving the temperature raising efficiency of fluid and a boiler including the same. The friction head includes: a body member including a bottom having a through hole through which a rotating shaft of the motor passes and a peripheral side wall formed to protrude outside the bottom; a cover member covering the body member; a rotating member rotatably coupled to a rotating shaft of the motor between the body member and the cover member; a collision friction region formed in a space between an edge side wall of the body member and the outer profile of the rotary member, thereby warming the fluid; and a surface friction region formed in at least one of a space between the bottom portion of the body member and one surface of the rotating member and a space between the bottom portion of the cover member and the other surface of the rotating member, thereby heating the fluid.

Description

Friction head and boiler comprising same

Technical Field

The present invention relates to a friction head that rotates a fluid at a high speed to heat the fluid by frictional heat, and a boiler including the same.

Background

A boiler device that heats a fluid such as water, steam, or a heat medium oil for supplying warm water or heating can heat the fluid using chemical fuel or electricity, and heat a room at a constant temperature using the heated fluid.

The boiler apparatus using chemical fuel has the following problems: during the combustion of the chemical fuel, a large amount of pollutants is discharged, and the thermal efficiency is reduced compared to the consumed chemical fuel.

On the other hand, the boiler device using electric energy may be an electric heater using electric resistance or a friction heater generating heat by the flow of fluid. In this case, the electric heater using the resistor has the following problems: not only is there a risk of electric leakage or fire depending on the properties of the fluid, but also it takes much time to heat a large amount of fluid since the fluid can be heated only in the vicinity of the electric heating wire that generates heat using electric resistance.

In order to solve such a problem, recently, a friction boiler in which a fluid is flowed by electric energy and the fluid is directly heated by the flow of the fluid is used.

The applicant of the present invention developed a friction boiler which flows a fluid by electric energy and directly heats the fluid using the flow of the fluid. As such a friction boiler, one disclosed in Korean laid-open patent No. 10-2019-0066374 (hereinafter referred to as "patent document 1") is known.

Patent document 1 may include a configuration in which a fluid is caused to flow and heated as follows: a heating unit including an intake unit 1001 that takes in a fluid and an ejection unit 1002 that ejects the fluid; and a motor connected to the heating part.

Such patent document 1 discloses the following structure: an intake portion 1001 for allowing a fluid to flow into the heating portion and a discharge portion 1002 for discharging a fluid flowing at a high speed through a centrifugal force are formed on a side wall of the head portion 1000.

Fig. 1 is a diagram schematically illustrating a head 1000 constituting a friction boiler. The head 1000 may include a suction portion 1001 and a discharge portion 1002 on a side wall thereof. As shown in fig. 1, the suction portion 1001 and the discharge portion 1002 may be provided so as to communicate with the inside of the head 1000, and may be formed so as to protrude from the body portion 1003 forming a space so that the fluid can be rotated inside the head 1000.

The fluid flowing into the head 1000 through the suction part 1001 and rotating at a high speed while being heated by frictional resistance collides and rubs only at the outer periphery thereof, thereby increasing the temperature. In other words, the region where the fluid collides to raise the temperature can be formed only in the outer contour region. Therefore, the following problems occur: most of the fluid inside the head 1000 is concentrated in the outer region, causing an excessive load to the rotating member, and the efficiency of heating the fluid using the region other than the outer region is low.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Korean laid-open patent No. 10-2019-0066374

Disclosure of Invention

[ problems to be solved by the invention ]

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a friction head capable of improving a heating efficiency of a fluid, and a boiler including the same.

The present invention also aims to improve the structure of a conventional friction head and a boiler including the same.

[ means for solving problems ]

A friction head according to a feature of the present invention is characterized by comprising: a body member including a bottom portion having a through hole through which a rotating shaft of a motor passes and a peripheral side wall formed to protrude outside the bottom portion; a cover member covering the body member; a rotating member rotatably coupled to a rotating shaft of the motor between the body member and the cover member; a collision friction region formed in a space between an edge side wall of the body member and a profile of the rotary member, thereby warming a fluid; and a surface friction region formed in at least one of a space between the bottom of the body member and one surface of the rotating member and a space between the bottom of the cover member and the other surface of the rotating member, thereby heating the fluid.

Further, it is characterized in that the collision friction region includes a collision friction portion formed at the edge side wall, the collision friction portion includes an inclined protrusion portion formed continuously with the semicircular section portion between the semicircular section portion and the adjoining semicircular section portion, the inclined protrusion portion protrudes toward an inner side direction of the body member, and an end portion of the inclined protrusion portion is formed obliquely facing one side.

Further characterized in that said surface friction area comprises: at least one first circumferential groove formed in a bottom portion of the body member and at least one first urging rib included in a face of the rotating member.

Further characterized in that said surface friction area comprises: at least one second circumferential groove formed in the bottom of the cover member and at least one second pushing rib included in the other surface of the rotating member.

The fluid injection device is characterized by comprising a fluid inlet and a fluid outlet formed in the covering member.

The fluid supply device is characterized by comprising a fluid inlet port for allowing the fluid to flow into the body member in a direction parallel to the rotation axis of the motor, and a fluid outlet port for discharging the fluid to the outside of the body member in a direction parallel to the rotation axis of the motor.

Further, it is characterized in that in the body member, a fluid inflow portion is formed at a position corresponding to the fluid inflow port, and a fluid discharge portion is formed at a position corresponding to the fluid discharge port, a bottom surface of the fluid inflow portion is formed to be inclined downward in a rotation direction of the rotation member, and a bottom surface of the fluid discharge portion is formed to be inclined upward in the rotation direction of the rotation member.

Further, the fluid discharge portion is characterized in that a collision friction portion formed on the edge side wall is formed in a circumferential direction from the fluid inflow portion to the fluid discharge portion, and the collision friction portion is not formed on the edge side wall in the circumferential direction from the fluid discharge portion to the fluid inflow portion.

Further, at least a part of the outer contour of the rotary member is exposed through the fluid inlet and the fluid outlet.

Further, it is characterized in that the body member includes a fastening flange bolted to a flange portion of the motor.

A friction head according to another feature of the present invention is characterized by comprising: a body member including a bottom portion having a through hole through which a rotating shaft of a motor passes and a peripheral side wall formed to protrude outside the bottom portion; a cover member fastened to the body member and including a fluid inflow port and a fluid discharge port; a rotating member rotatably coupled to a rotating shaft of the motor between the body member and the cover member; a collision friction region formed between a collision friction portion formed on the edge side wall and an outer contour portion of the rotating member, and configured to move the fluid in a rotation direction of the rotating member along the collision friction portion formed on the edge side wall and to increase a temperature of the fluid; and a surface friction region formed at least either between a bottom portion of the body member and one surface of the rotation member facing the bottom portion or between the cover member and the other surface of the rotation member facing the cover member, the surface friction region guiding a flow of the fluid in a surface direction perpendicular to a direction of a centrifugal force generated when the rotation member rotates and heating the fluid.

Further, it is characterized in that the edge side wall includes a circular section having the collision friction portion and two arc-shaped sections which do not have the collision friction portion and are convex outward, at least one of the arc-shaped sections is a fluid inflow portion formed in the body member so as to correspond to the fluid inflow port, and the other is a fluid discharge portion formed in the body member so as to correspond to the fluid discharge port.

A boiler according to another feature of the present invention is characterized by comprising: a motor; a friction head; and a case, wherein the friction head includes: a body member including a bottom portion having a through hole through which a rotating shaft of the motor passes and a peripheral side wall formed outside the bottom portion; a cover member covering the body member; and a rotating member rotatably provided between the body member and the cover member in such a manner as to be coupled to a rotating shaft of the motor; a collision friction region formed in a space between an edge side wall of the body member and a profile of the rotary member, thereby warming a fluid; and a surface friction region formed in at least one of a space between a bottom portion of the body member and one surface of the rotating member and a space between a bottom portion of the cover member and the other surface of the rotating member, the surface friction region increasing a temperature of the fluid, and the tank storing the fluid increased in temperature by the friction head.

Further, it is characterized in that the fastening flange of the body member is joined to a mounting portion formed at a flange portion of the motor by a bolt.

[ Effect of the invention ]

As described above, the friction head and the boiler including the same according to the present invention include the impact friction region and the surface friction region inside the friction head, and the temperature of the fluid can be simultaneously increased in the impact friction region and the surface friction region, thereby having an effect of high temperature heating efficiency.

Drawings

Fig. 1 is a diagram schematically illustrating a head of a friction boiler as a background of the concept of the present invention.

Fig. 2 is a view of the friction head of the present invention incorporating a motor, viewed from above and illustrated.

Fig. 3 is a view illustrating a plane cut along a-a' of fig. 2.

Fig. 4 is an exploded perspective view of the friction head and motor fastening structure of the present invention.

Fig. 5 is a view showing one surface of the covering member as viewed from above.

Fig. 6 is a view showing the main body member accommodating the rotary member as viewed from above.

Fig. 7 conceptually illustrates a diagram of the flow of fluid in the surface friction region.

Fig. 8 is a view illustrating a plane cut along a-a' of fig. 6.

Fig. 9 is a rear view of fig. 6.

FIG. 10 is a view illustrating a plane cut along B-B' of FIG. 6

Fig. 11 is a view illustrating the other surface of the rotating member.

Fig. 12 is a view illustrating one surface of the rotating member.

Fig. 13 is an enlarged view of a part of fig. 12.

Fig. 14 is a view of the body member viewed from above.

Fig. 15(a) and 15(b) are enlarged views of a part of fig. 14.

Fig. 16 is a view showing the body member as viewed from below.

Detailed Description

The following merely illustrates the principles of the invention. Therefore, those skilled in the art can embody the principles of the invention and invent various devices included in the concept and scope of the invention even if they are not explicitly described or illustrated in the present specification. In addition, it is to be understood that all terms and examples of the conditional parts listed in the present specification are principally intended to be interpreted only for the purpose of understanding the concept of the present invention, and are not to be construed as being limited to the examples and states specifically listed above.

The objects, features and advantages described above will be further apparent from the accompanying drawings and the following detailed description thereof, and thus, the technical ideas of the present invention can be easily implemented by those having ordinary knowledge in the technical fields to which the present invention pertains.

The embodiments described in the present specification are described with reference to a cross-sectional view and/or a perspective view, which are ideal illustrative views of the present invention. The form of the illustrations may be altered using manufacturing techniques and/or tolerances, etc. Therefore, the embodiments of the present invention are not limited to the specific forms illustrated in the drawings, and include changes in form according to the manufacturing process.

In describing the various embodiments, for convenience, the same names and the same reference numerals are given to the components that perform the same functions even though the embodiments are different. In addition, the configuration and operation that have been described in the other embodiments may be omitted for convenience.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 2 and 3, a fastening structure of the friction head 100 and the motor 200 will be described. Fig. 2 is a view illustrating the friction head 100 of the present invention as viewed from above, fig. 3 is a view illustrating a cross section of the friction head 100 of fig. 2 as fastened to the motor 200 and cut along a-a ', fig. 4 is a separated perspective view of the friction head 100 and the motor 200 fastening structure, fig. 5 is a view illustrating one surface of the cover member 29 as viewed from above, fig. 6 is a view illustrating the body member 10 housing the rotation member 22 as viewed from above, fig. 7 conceptually illustrates a flow of a fluid in the surface friction region SF, fig. 8 is a view illustrating a surface cut along a-a ' of fig. 6, fig. 9 is a view illustrating fig. 6 as viewed from behind, fig. 10 is a view illustrating a surface cut along B-B ' of fig. 6, fig. 11 is a view illustrating the other surface 22B of the rotation member, fig. 12 is a view illustrating one surface 22a of the rotation member, fig. 13 is an enlarged view of a part of fig. 12, fig. 14 is an enlarged view of the body member 10 as viewed from above, fig. 15(a) and 15(b) are enlarged views of a part of fig. 14, and fig. 16 is an enlarged view of the body member 10 as viewed from below.

As shown in fig. 2 and 3, the friction head 100 of the present invention includes: a body member 10 including a bottom portion 11 having a through hole 12 through which a rotating shaft 200a of the motor 200 passes, and a peripheral side wall 14 formed outside the bottom portion 11; a cover member 29 covering the body member 10; the rotating member 22 is rotatably provided by coupling the rotating shaft 200a of the motor 200 between the body member 10 and the cover member 29, and may include: a collision friction region CF formed in a space between the edge side wall 14 of the body member 10 and the outer profile 28 of the rotary member 22, thereby warming the fluid; and a surface friction region SF formed in at least one of a space between the bottom portion 11 of the body member 10 and one surface of the rotation member 22 and a space between the bottom portion 30 of the cover member 29 and the other surface of the rotation member 22, thereby heating the fluid.

As shown in fig. 3, the friction head 100 may be fastened with the motor 200.

The motor 200 may include a flange portion 201, and the flange portion 201 is formed with a mounting portion 201a to mount the rotation shaft 200a, the fastening flange 18 of the body member 10.

As shown in fig. 3, the motor 200 may include a rotation shaft 200a at the center. The rotation shaft 200a of the motor 200 may penetrate through a through hole 12 formed in the center of the bottom 11 of the body member 10 and be fastened to the fastening portion 23 of the rotation member 22. The rotation shaft 200a of the motor 200 may be fastened to the rotation member 22 and the bolt B by disposing the bolt B in a first bolt fastening hole BH1 formed in the fastening portion 23. Therefore, the rotating member 22 is coupled to the rotating shaft 200a of the motor 200 and accommodated in the friction head 100 in the body member 10.

The motor 200 may include a flange portion 201 at a front end portion where the rotation shaft 200a protrudes. The flange portion 201 may be formed with a mounting portion 201a to which the fastening flange 18 of the body member 10 is mounted and fastened with a bolt B.

A second bolt fastening hole BH2 may be formed at the mounting portion 201 a. The second bolt-fastening holes BH2 may be formed at positions corresponding to the third bolt-fastening holes BH3 included in the fastening flange 18 of the body member 10. As shown in fig. 3, the fastening flange 18 of the body member 10 is mounted to the mounting portion 201a, and the bolts B are installed in the second bolt-fastening holes BH2 and the third bolt-fastening holes BH3, so that the motor 200 can be directly mounted to the body member 10 of the friction head 100.

The body member 10 is coupled to the motor 200, and houses the rotary member 22 coupled to the rotary shaft 200a of the motor 200 therein, thereby functioning as a housing of the rotary member 22.

The body member 10 may be constituted by: an edge portion 13 in which a fifth bolt fastening hole BH5 for fastening the cover member 29 with a bolt B is formed; and a fastening flange 18 formed with a third bolt fastening hole BH3 that is attached to the attachment portion 201a of the motor 200 and can be fastened to the motor 200 with a bolt B.

The body member 10 can function as a structure for actually forming a structure for directly connecting the friction head 100 and the motor 200. As shown in fig. 3, the fastening flange 18 of the body member 10 may be mounted to the mounting portion 201a of the motor 200. In the structure as described above, the third bolt-fastening hole BH3 of the fastening flange 18 may correspond to the second bolt-fastening hole BH2 of the mounting portion 201 a. Bolts B may be included in such second and third bolt-fastening holes BH2, BH 3. Accordingly, the body member 10 may be combined with the motor 200.

The body member 10 can be sealed by fastening the cover member 29 to the body member 10 with bolts B.

As shown in fig. 3, a fourth bolt fastening hole BH4 may be formed at the edge portion 34 of the cover member 29. The fourth bolt-fastening holes BH4 may be formed at positions corresponding to the fifth bolt-fastening holes BH5 formed in the edge portion 13 of the body member 10. By providing the bolts B in the fourth and fifth bolt-fastening holes BH4 and BH5, the cover member 29 can be fastened to the body member 10.

The cover member 29 may include a fluid inflow port 32 and a fluid exhaust port 33. The cover member 29 may include a fluid inflow port 32 to allow fluid to flow into the inside of the body member 10 in a direction parallel to the rotation axis 200a of the motor 200, and may include a fluid discharge port 33 to allow fluid to be discharged to the outside of the body member 10 in a direction parallel to the rotation axis 200a of the motor 200.

As shown in fig. 2, the friction head 100 may expose at least a portion of the profile 28 of the rotational member 22 through the fluid inlet 32 and the fluid outlet 33.

Conventionally, the head 1000 includes the suction portion 1001 and the discharge portion 1002 on the vertical side wall thereof, so that most of the fluid is present in the collision friction region CF, and the temperature is increased by the collision friction.

However, in the present invention, the covering member 29 includes the fluid inlet 32 and the fluid outlet 33, so that the fluid exists in the collision friction region CF and the surface friction region SF.

The fluid flowing in through the fluid inlet 32 can flow into the rotating member 22 side along at least a part of the exposed contour portion 28. In addition, the fluid may flow into the fluid inflow portion 20 exposed through the fluid inflow port 32 at least partially. Therefore, the fluid can be made to flow into the collision friction region CF while also being made to flow sufficiently into the surface friction region SF. The fluid exists in the surface friction region SF and can continuously perform a temperature rising process by the first and second circumferential grooves CH1 and CH2 and the first and second push ribs RB1 and RB2 corresponding thereto, respectively.

The fluid flowing in through the fluid inflow port 32 may be subjected to a centrifugal force and flow to the side of the rim sidewall 14. And thus can flow into the collision friction area CF and can perform a temperature-rising process.

As described above, in the present invention, the fluid can be present in the surface friction region SF by the configuration of the fluid inlet 32 provided to allow the fluid to flow into the body member 10 in the direction parallel to the rotation axis 200a of the motor 200. In addition, the fluid can be more remained in the surface friction region SF by the position of the fluid discharge port 33.

The present invention includes the fluid inlet 32 and the fluid outlet 33, so that the fluid is present in the collision friction region CF and the surface friction region SF, and the fluid can be repeatedly introduced and discharged.

As shown in fig. 3, the present invention may be configured such that the friction head 100 and the motor 200 are directly connected, and the body member 10 and the cover member 29 for housing the rotation member 22 are fastened to each other by bolts in the friction head 100.

In the case of a structure in which the rotary shaft 200a of the motor 200 includes a separate coupling unit (e.g., a motor coupling) and the friction head 100 is fastened to the motor 200 by the coupling unit, the rotary shaft 200a rotating the rotary member 22 may be lengthened, and thus it is difficult to maintain concentricity. The friction head 100 requiring the high-speed rotation of the rotary member 22 may cause a trouble in the rotation function when the concentricity between the center axis of the friction head 100 and the rotary shaft 200a of the motor 200 is not maintained.

However, as shown in fig. 3, the present invention may directly fasten the rotation shaft 200a of the motor 200 to the rotation member 22 and directly fasten the motor 200 to the body member 10 without a separate connection unit. In this manner, the friction head 100 of the present invention can shorten the length of the rotation shaft 200a used to rotate the rotation member 22 by the structure in which the motor 200 is directly connected to the friction head 100. The concentricity between the friction head 100 and the rotation shaft 200a of the motor 200 can be maintained. As a result, high-speed rotation of the rotary member 22 can be performed more efficiently.

Fig. 4 is an exploded perspective view of a structure for fastening the motor 200 to the friction head 100.

As shown in fig. 4, 14, 15(a), 15(b) and 16, the main body member 10 may include the following members: a bottom portion 11 including a through hole 12 through which a rotating shaft 200a of the motor 200 passes; a rim portion 13 including a rim sidewall 14 protrudingly formed at an outer side of the bottom portion 11; and a fastening flange 18 provided along the lower side of the edge portion 13.

The body member 10 can form a space for accommodating the rotation member 22 therein by the bottom portion 11 and the edge portion 13. By housing the rotary member 22 inside the body member 10, the friction head 100 can form the impact friction area CF along the contour portion.

The bottom 11 of the body member 10 may include a through hole 12 and a bottom surface 11 a. A through hole 12 through which the rotation shaft 200a passes may be formed at the center of the bottom 11 of the body member 10 and a bottom surface 11a may be formed around the same.

For example, a plurality of first circumferential grooves CH1 chiseled in a circular band shape having different inner diameters may be formed on the bottom surface 11a of the bottom 11. The number of the first circumferential grooves CH1 is not limited, and at least one first circumferential groove CH1 may be formed.

The first circumferential groove CH1 may allow the fluid flowing into the skin friction region SF through the fluid inflow port 32 to flow along the first circumferential groove CH1 so as to be present in the skin friction region SF. The fluid may be continuously forced in the direction of centrifugal force by the rotation of the rotating member 22. The first circumferential groove CH1 may function as follows: the fluid flowing into the first circumferential groove CH1 is caused to flow along the first circumferential groove CH1, and is stored so that the fluid other than the fluid subjected to the centrifugal force by the rotating member 22 remains in the surface friction region SF. Therefore, the frictional resistance between the fluid flowing in the centrifugal force direction in the surface friction region SF and the fluid flowing along the first circumferential groove CH1 can be increased.

The surface friction region SF may be a space between the bottom 11 of the body member 10 and one surface 22a of the rotation member 22. Therefore, there may be a space including a region of the first circumferential groove CH1 formed with the bottom portion 11 of the body member 10 and a region having the first push rib RB1 on the one face 22a of the rotary member 22. In the surface friction region SF, the first circumferential groove CH1 and the first thrust rib RB1 are provided at positions corresponding to each other, and a temperature rise due to friction of the fluid may be generated in the surface friction region SF.

The fluid flows into the first circumferential groove CH1 while being subjected to a centrifugal force, and therefore frictional resistance increases. In this case, collision between the fluids is generated by the rotation of the first advance rib RB1 of the rotary member 22 positioned in a rotating manner at the upper side of the first circumferential groove CH1, resulting in further increase in frictional resistance. Therefore, the heating efficiency of the fluid of the friction head 100 can be further improved.

Referring to fig. 4 and 14, a collision friction portion 15 may be formed on the edge side wall 14 of the body member 10. The collision friction part 15 is configured to include an end face 15 b' inclined between the semicircular section face 15a and the semicircular section face 15a, and may include an inclined protrusion 15b protruding therefrom.

The collision friction portion 15 generates collision friction heat when the fluid flowing inside the body member 10 collides with the edge side wall 14, so that the fluid can be heated more efficiently.

AS shown in fig. 14, the edge side wall 14 includes a circular section CS having the collision friction portion 15 and two arc-shaped sections AS which do not have the collision friction portion 15 and are convex outward, but at least one of the arc-shaped sections AS is the fluid inflow portion 20 formed in the body member 10 so AS to correspond to the fluid inflow port 32, and the other one may be the fluid discharge portion 21 formed in the body member 10 so AS to correspond to the fluid discharge port 33.

AS shown in fig. 14, the peripheral sidewall 14 of the body member 10 may be formed of a circular section CS except for the arc-shaped section AS including the fluid inflow portion 20 and the arc-shaped section AS including the fluid discharge portion 21. The circular section CS includes the collision friction portion 15, and the arc-shaped section AS may include the fluid inflow portion 20 and the fluid discharge portion 21 without the collision friction portion 15.

Referring to fig. 14, the body member 10 may have the following structure: the collision friction portion 15 formed on the edge side wall 14 is formed in the circumferential direction from the fluid inflow portion 20 to the fluid discharge portion 21, and the collision friction portion 15 is not formed on the edge side wall 14 in the circumferential direction from the fluid discharge portion 21 to the fluid inflow portion 20. Specifically, the edge side wall 14 may include the collision friction portion 15 between the fluid inflow portion 20 and the fluid discharge portion 21 in the circumferential direction from the fluid inflow portion 20 to the fluid discharge portion 21.

On the other hand, the edge sidewall 14 existing between the fluid discharge portion 21 and the fluid inflow portion 20 existing in the circumferential direction from the fluid discharge portion 21 to the fluid inflow portion 20 may include a step SP generated by a coupling structure with the cover member 29. According to the structure as described above, most area of the edge side wall 14 of the body member 10 is constituted by the collision friction part 15, and the remaining area may be constituted by the step SP area including the step SP for easy coupling with the cover member 29.

The body member 10 may be formed with an impact friction portion 15 at the rim side wall 14 located in the circumferential direction from the fluid inflow portion 20 to the fluid discharge portion 21 among the rim side walls 14, and a step SP for bonding may be formed at the rim side wall 14 located in the circumferential direction from the fluid discharge portion 21 to the fluid inflow portion 20. Therefore, a large area of the rim side wall 14 on which the fluid subjected to the centrifugal force by the rotation of the rotating member 22 collides is made up of the collision friction portion 15, and therefore the heating of the fluid by friction can be more effectively achieved inside the body member 10.

In addition, a partial region excluding the collision friction portion 15 (specifically, a partial region located between the fluid inflow portion 20 and the fluid outflow portion 21 in the circumferential direction from the fluid discharge portion 21 to the fluid inflow portion 20) may be formed with a step SP for easy coupling with another member (for example, the covering member 29). Therefore, before the members different from each other (e.g., the body member 10 and the cover member 29) are fastened with the bolts B, it is first of all possible to efficiently perform the alignment (align) between the members.

Referring to fig. 15(a), the semicircular cross-sectional portions 15a and the inclined protrusions 15b constituting the collision friction portion 15 may be alternately repeatedly formed and continuously connected.

With this configuration of the collision friction portion 15, the fluid can collide against the inclined protrusion portion 15b of the collision friction portion 15 by the centrifugal force of the rotating member 22 and flow into the semicircular cross-sectional portion 15 a. As shown in fig. 15(a), the end surface 15b 'of the inclined protrusion 15b is formed to be inclined in the direction of the semicircular cross-section 15a, so that the fluid colliding against the inclined protrusion 15b can easily flow into the semicircular cross-section 15a along the end surface 15 b'.

The semi-circular cross-sectional portion 15a allows the fluid to move rapidly along the semi-circular cross-section without great loss. In the process as described above, the fluid flowing into the semicircular cross-sectional portion 15a by the centrifugal force of the rotary member 22 may collide with the fluid rapidly moving along the semicircular cross-section.

The fluid may be rubbed by the end surface 15 b' of the inclined protrusion 15b and flow into the semicircular section surface 15a, and collide with the fluid detached from the rotating member 22 by centrifugal force. The collided fluid can be easily separated from the semicircular section part 15a by inclining the end face 15 b' of the protrusion part 15 b.

The fluid can flow continuously and smoothly in the semicircular cross-section 15a and the inclined protrusion 15b, and can flow after flowing into the semicircular cross-section 15a and rapidly separate from the semicircular cross-section 15a along the end surface 15 b'. Therefore, the fluid is heated efficiently by the frictional resistance inside the body member 10, and the temperature can be raised quickly.

The collision friction region CF includes a collision friction portion 15 formed at the edge side wall 14, the collision friction portion 15 includes an inclined protrusion portion 15b continuously formed with the semicircular section portion 15a between the semicircular section portion 15a and the adjoining semicircular section portion 15a, and the inclined protrusion portion 15b protrudes toward the inner side of the body member 10 and an end surface 15 b' thereof may be formed obliquely to one side. The end surface 15 b' inclined to one side is preferably tiltable along the semicircular section surface portion 15a side. This is because the fluid that has been separated by the centrifugal force applied to the rotating member 22 can easily flow into the semicircular cross-section 15a along the end surface 15 b' by colliding with the inclined protrusion 15 b. Also to prevent overloading of the rotary member 22.

The collision friction region CF can more effectively improve the heating efficiency of the fluid heated by the frictional resistance in the collision friction region CF by the collision friction portion 15.

A third friction part 19 formed in a plurality of ribs may be included between the bottom surface 11a of the body member 10 and the inclined protrusion 15b of the collision friction part 15.

Referring to fig. 15(a), the third friction part 19 may be formed between the inclined protrusion 15b and the first circumferential groove CH1 such that the inclination in the direction of the inclined protrusion 15b is reduced, and may be connected to the end surface 15 b' of the inclined protrusion 15 b.

The third friction portion 19 allows the fluid, which is subjected to the centrifugal force along the first circumferential groove CH1, to easily flow into the semicircular cross-sectional portion 15a along the inclined flow-through end surface 15 b' of the third friction portion 19. The third friction portion 19 may provide a region where the fluid flowing in the collision friction region CF may be subjected to frictional resistance again.

The body member 10 is formed with a fluid inflow portion 20 at a position corresponding to the fluid inflow port 32, a fluid discharge portion 21 at a position corresponding to the fluid discharge port 33, a bottom surface 20G of the fluid inflow portion 20 is formed to be inclined downward in the rotation direction of the rotation member 22, and a bottom surface 21G of the fluid discharge portion 21 may be formed to be inclined upward in the rotation direction of the rotation member 22. In the present invention, the fluid inlet 32 and the fluid outlet 33 may be both included in the covering member 29, as an example. In this case, the body member 10 may be implemented as shown in fig. 14, in which the fluid inlet portion 20 is formed at a position corresponding to the fluid inlet 32 of the cover member 29, and the fluid outlet portion 21 is formed at a position corresponding to the fluid outlet 33.

In this case, the fluid inflow portion 20 and the fluid discharge portion 21 may include inclined bottom surfaces 20G and 21G, and may perform a function of guiding the fluid of the fluid inflow portion 20 and the fluid discharge portion 21 in one direction. In this case, the upward and downward directions in which the bottom surfaces 20G and 21G of the fluid inflow portion 20 and the fluid discharge portion 21 are inclined may be different from each other.

Fig. 15(b) is an enlarged view of the fluid inflow portion 20 of the body member 10. The fluid inflow portion 20 and the fluid discharge portion 21 may have the same structure and function except for the difference in the direction in which the bottom surfaces 20G and 21G are inclined. Therefore, the structure and function of the fluid inflow portion 20 and the fluid discharge portion 21 will be specifically described with reference to the fluid inflow portion 20 in fig. 15 (b).

As shown in fig. 15(b), as an example, the bottom surface 20G of the fluid inflow portion 20 may be formed to be inclined downward in a rotation direction (e.g., clockwise direction) of the rotation member 22.

The fluid inflow portion 20 is provided at a position corresponding to the fluid inflow port 32 of the cover member 29 into which the fluid flows, and may be a portion into which the fluid flowing into the interior of the friction head 100 collides. Accordingly, the bottom surface 20G of the fluid inflow portion 20 is formed to be inclined downward in the rotation direction of the rotation member 22, thereby guiding the fluid flowing into the interior of the friction head 100 through the fluid inflow port 32 in one direction (e.g., clockwise).

The fluid discharge portion 21 may be a region where the fluid flowing through the rotation member 22 is subjected to a centrifugal force and discharged through the fluid discharge port 33 formed in a direction perpendicular to the direction of the centrifugal force and collides. Such a fluid discharge portion 21 may be formed to be inclined upward in the rotation direction of the rotation member 22. The bottom surface 21G of the fluid discharge portion 21 is formed to be inclined upward in the rotation direction of the rotation member 22, and the fluid colliding against the bottom surface 21G of the fluid discharge portion 21 can be guided in the direction opposite to the rotation direction of the rotation member 22.

Therefore, the fluid flowing in the rotating direction of the rotating member 22 can collide with the fluid flowing as follows: the fluid that is rotated in the rotation direction of the rotation member 22 to collide against the bottom surface 21G of the fluid discharge portion 21 and flow in the opposite direction of the rotation member 22 through the bottom surface 21G. The heating efficiency of the fluid can be further improved by friction as described above.

Fig. 16 is a view illustrating the body member 10 as viewed from below. The body member 10 is constituted to include a fastening flange 18 bolted to the flange portion 201 of the motor 200. In the fastening flange 18, a third bolt fastening hole BH3 may be formed at a position corresponding to the second bolt fastening hole BH2 formed in the mounting portion 201a of the flange portion 201 of the motor 200.

As shown in fig. 4, 6, 11 and 12, the rotating member 22 may include the following components: a fastening portion 23 including a first bolt fastening hole BH 1; a middle portion 27 having a pushing rib RB including a first pushing rib RB1 and a second pushing rib RB 2; and a contoured portion 28 formed along the contour of the intermediate portion 27.

By the rotation of the rotary member 22, the fluid collides against the collision friction portion 15 of the rim side wall 14 of the body member 10. For example, the rotating member 22 may be an impeller.

The first and second pushing ribs RB1 and RB2 may be formed on the first and

second surfaces

22a and 22b of the rotary member 22, respectively. In the present invention, as an example, the first push rib RB1 may be formed on the one surface 22a of the rotary member 22, and the second push rib RB2 may be formed on the other surface 22 b. In the present invention, for example, the one surface 22a of the rotary member 22 may be a surface facing the first circumferential groove CH1 of the body member 10, and the other surface 22b of the rotary member 22 may be a surface facing a second circumferential groove of the cover member 29 described later.

In the present invention, the pushing rib RB1 and the pushing rib RB2 are provided on both surfaces of the rotary member 22, respectively, as an example, but the pushing rib RB may be provided on at least one of the one surface 22a and the other surface 22b of the rotary member 22. In this case, it is preferable that the circumferential groove may be included in a direction opposite to any one surface of the rotary member 22 including the push rib RB (specifically, the first circumferential groove CH1 in the case where the one surface 22a of the rotary member 22 includes the first push rib RB1, and the second circumferential groove CH2 in the case where the other surface 22b of the rotary member 22 includes the second push rib RB 2).

More preferably, the rotary member 22 includes first and second pushing ribs RB1 and RB2 on both sides thereof, respectively, and the body member 10 and the cover member 29 include first and second circumferential grooves CH1 and CH2, respectively. Therefore, the first and second thrust ribs RB1, RB2 rotate above the first and second circumferential grooves CH1, CH2 corresponding thereto in the surface friction region SF, and the frictional resistance of the fluid can be increased by the friction between the fluid flowing into the first and second circumferential grooves CH1, CH2 and the fluid flowing by the first and second thrust ribs RB1, RB 2.

As shown in fig. 4, 6, 11, 12, and 13, a first push rib RB1 may be formed on one surface 22a of the rotary member 22. In the present invention, the one surface 22a of the rotary member 22 may be, for example, a lower surface of the rotary member 22 provided in a direction facing the first circumferential groove CH1 of the body member 10.

The first push rib RB1 may be formed at the middle portion 27 between the fastening portion 23 and the profile portion 28.

As shown in fig. 13, the first push rib RB1 may be formed such that the front surface is formed as the inclined surface 24 and the rear surface is formed as the vertical surface 25. The inclined surface 24 may be inclined upward and protrudingly formed. In this case, the inclined surface 24 may be formed as follows: the fluid flowing in the rotating direction of the rotary member 22 is made to have an inclination angle that flows upward along the inclined surface 24 from the flat surface intermediate surface 27a and can rotate by passing the first impelling rib RB 1.

The first push rib RB1 may be provided so that the front surface formed as the inclined surface 24 is in the rotation direction of the rotary member 22. For example, in the case where the rotation direction of the rotary member 22 is the clockwise direction, the inclined surface 24 of the first push rib RB1 provided on the lower surface of the rotary member 22 may be provided so as to be located on the clockwise direction side. Therefore, the fluid flowing in the clockwise direction through the rotating member 22 rotates in the clockwise direction along the inclined surface 24 positioned while generating frictional resistance, but does not cause noise and overload when the rotating member 22 rotates.

In the case where the first urging rib RB1 is provided such that the vertical surface 25 is located on the counterclockwise direction side, noise and overload may be caused during rotation of the rotary member 22. Accordingly, in the present invention, since the inclined surface 24 of the first thrust rib RB1 is positioned in the same direction as the rotation direction of the rotary member 22 and the fluid flows along the inclined surface 24 of the first thrust rib RB1, it is possible to prevent the generation of load and/or noise when the rotary member 22 rotates.

The first push rib RB1 is an upper side of the first circumferential groove CH1, and is rotatable in a direction opposite to the first circumferential groove CH 1. The frictional resistance between the fluid flowing in the direction perpendicular to the centrifugal force direction toward the first circumferential groove CH1 side by the first impelling rib RB1 and the fluid flowing along the first impelling rib RB1 can be further increased.

The surface friction region SF may include at least one first circumferential groove CH1 formed on the bottom 11 of the body member 10 and at least one first push rib RB1 provided on one face 22a of the rotary member 22.

The fluid that is subjected to the rotational force in the circumferential direction by the first circumferential groove CH1 and the first thrust rib RB1 is also simultaneously subjected to the centrifugal force generated by the rotation of the rotary member 22, and at the same time, greater frictional resistance can be generated. Therefore, the surface friction region SF can be effectively formed inside the friction head 100.

On the other face 22b of the rotary member 22, the intermediate portion 27 between the fastening portion 23 and the profile portion 28 may include a second urging rib RB 2. In the present invention, the other surface 22b of the rotary member 22 may be an upper surface of the rotary member 22, for example.

The upper surface of the rotary member 22, which rotates in the direction opposite to the second circumferential groove CH2 of the cover member 29, may include a second push rib RB 2. The second push rib RB2 may be configured such that the first push rib RB1 is turned upside down. Therefore, the front surface of the second pushing rib RB2 is formed as the inclined surface 24, and the rear surface thereof is formed as the vertical surface 25, and the inclined surface 24 may be provided so as to be positioned in the same direction as the rotation direction of the rotation member 22.

With the structure as described above, the fluid may flow in the rotation direction through the inclined surface 24 of the second push rib RB2 according to the direction of rotation in the clockwise direction of the rotation member 22. Therefore, the rotating member 22 can rotate by generating frictional resistance to the fluid using the inclined surface 24 without causing noise and overload.

In the present invention, the first and second push ribs RB1, RB2 may be included on the one surface 22a and the other surface 22b of the rotation member 22 to position the inclined surface 24 in consideration of the rotation direction of the rotation member 22. With the above-described structure, the friction head 100 generates frictional resistance to fluid by the inclined surfaces 24 of the first and second thrust ribs RB1 and RB2 when rotating at high speed, and at the same time, can prevent the problem of causing excessive load. As a result, the problem of noise caused by the load can be prevented.

A through inflow hole 26 through which a portion of the flowing fluid passes and flows may be included between the pushing ribs RB of the rotary member 22. A push rib RB may be included at the periphery of the through-inflow hole 26. In the friction head 100, the fluid flowing from the other surface 22b side of the rotating member 22 and the fluid flowing from the one surface 22a side of the rotating member 22 pass through the through-inflow holes 26, and a vortex is generated. Therefore, the temperature of the fluid can be rapidly increased.

The through-flow hole 26 allows the fluid flowing along the inclined surfaces 24 of the first and second impelling ribs RB1, RB2 to pass therethrough, and the flow direction thereof intersects vertically. Therefore, the fluid is continuously present in the surface friction region SF and a process of raising the temperature of the fluid may be performed.

A second friction portion 28a formed of a plurality of ribs may be formed at the outer contour portion 28 of the rotary member 22. The second friction portion 28a may transmit a greater rotational force to the fluid. Specifically, centrifugal forces are imparted to the fluid moving between the ribs so that the fluid can impinge very quickly and strongly against the rim sidewall 14. The spacing distance between the second friction portion 28a and the collision friction portion 15 is formed very narrow, and therefore the fluid collides with the collision friction portion 15 strongly and flows in the rotation direction of the rotary member 22. At this time, the fluid can receive friction and compression force, thereby greatly increasing the temperature.

The rotation member 22 may be set to a size such that at least a part of the outline portion 28 is exposed through the fluid inlet 32 and the fluid outlet 33 included in the cover member 29. Therefore, the friction head 100 can be configured to expose at least a part of the outer peripheral portion 28 of the rotary member 22 through the fluid inlet port 32 and the fluid outlet port 33. The structure described above can be implemented as shown in fig. 2.

The cover member 29 may be provided on one surface of the side of the edge portion 13 of the body member 10 by inserting bolts into the fourth bolt-fastening holes BH4 formed in the edge portion 34 of the cover member 29 and the fifth bolt-fastening holes BH5 formed in the edge portion 13 of the body member 10 so as to be coupled with the body member 10.

The cover member 29 may have a face 29a positioned in a direction opposite to the rotary member 22 housed inside the body member 29. One face 29a of the cover member may be a face including the bottom 30 of the cover member 29. A receiving groove 30a may be formed at the center of the bottom 30 of the cover member 29, and the receiving groove 30a receives one end of the bolt B inserted into the first bolt-fastening hole BH1 of the rotary member 22.

The cover member 29 may include an intermediate portion 27 formed around the accommodation groove 30 a. For example, a second circumferential groove CH2 may be formed in the intermediate portion 27 formed in the bottom portion 30 of the cover member 29.

As an example, the second circumferential groove CH2 may include a plurality of structures chiseled in the shape of circular bands having inner diameters different from each other. The number of the second circumferential grooves CH2 is not limited, and at least one second circumferential groove CH2 may be formed.

The fluid subjected to the rotational force in the circumferential direction by the second circumferential groove CH2 and the second thrust rib RB2 is also subjected to the rotational force generated by the rotation of the rotary member 22, and the frictional resistance can be made further large.

The second circumferential groove CH2 may perform the same function as the first circumferential groove CH1 formed in the body member 10. Therefore, the second circumferential groove CH2 allows the fluid flowing into the surface friction region SF through the fluid inlet 32 to flow along the second circumferential groove CH2, and to be present in the surface friction region SF by receiving the rotational force and the centrifugal force. The second circumferential groove CH2 may function as follows: the fluid flowing into the second circumferential groove CH2 is stored so as to remain in the surface friction region SF by flowing along the second circumferential groove CH 2. Therefore, the frictional resistance between the fluids in the surface friction region SF can be increased.

The friction head 100 may form the surface friction region SF by the second circumferential groove CH2 and the second push rib RB2 of the rotary member 22 rotating in the opposite direction to the second circumferential groove CH 2. Thus, the surface friction region SF may include at least one second circumferential groove CH2 formed in the bottom 30 of the cover member 29 and at least one second thrust rib RB2 included in the other face 22b of the rotary member 22.

The surface friction region SF is formed in at least one or more of a space between the bottom portion 11 of the body member 10 and the one surface 22a of the rotation member 22 and a space between the bottom portion 30 of the cover member 29 and the other surface 22b of the rotation member 22, and thus the fluid can be warmed. Here, the space between the bottom 11 of the body member 10 and the one face 22a of the rotary member 22 may be a space including the first circumferential groove CH1 of the bottom 11 of the body member 10 and the first push rib RB1 of the one face 22a of the rotary member 22 rotating in the direction opposite to the first circumferential groove CH 1. On the other hand, the space between the bottom portion 30 of the cover member 29 and the other face 22b of the rotary member 22 may be a space including the second circumferential groove CH2 of the bottom portion 30 of the cover member 29 and the second push rib RB2 of the other face 22b of the rotary member 22 that rotates in the opposite direction to the second circumferential groove CH 2.

The surface friction region SF includes a pushing rib RB on at least one of the one surface and the other surface of the rotary member 22, and the circumferential groove CH is formed in the bottom 11 or 30 of at least one of the bottom 11 or 30 of the body member 10 or the cover member 29, so that the surface friction region SF can be formed.

Alternatively, the surface friction region SF may be a region including both: a space including the first circumferential groove CH1 of the bottom portion 11 of the body member 10, and the first push rib RB1 of the one face 22a of the rotary member 22 rotating in the direction opposite to the first circumferential groove CH 1; and a space including the second circumferential groove CH2 covering the bottom portion 30 of the member 29, and the second push rib RB2 of the other face 22b of the rotary member 22 rotating in the direction opposite to the second circumferential groove CH 2. This is achieved by forming the first and second circumferential grooves CH1 and CH2 in the bottom 11 of the body member 10 and the bottom 30 of the cover member 29, respectively, and forming the first and second thrust ribs RB1 and RB2 on the

opposite surfaces

22a and 22b of the rotary member 22.

As such, the friction head 100 of the present invention includes the following configuration, so that the fluid can be more effectively subjected to frictional resistance inside the friction head 100: a collision friction region CF for increasing the temperature of the fluid while moving the fluid in the rotation direction of the rotary member 22 along the collision friction portion 15; and a surface friction region SF which is formed at least either between the bottom portion 11 of the body member 10 and one surface of the rotation member 22 opposed thereto or between the cover member 29 and the other surface of the rotation member 22 opposed thereto, and which guides a flow of the fluid in a surface direction perpendicular to a centrifugal force direction generated when the rotation member 22 rotates while heating the fluid. As a result, the friction head 100 can efficiently and rapidly heat up the fluid.

Fig. 5 is a view illustrating the bottom 30 of the cover member 29 of the friction head 100 as viewed from above. As shown in fig. 5, the cover member 29 may include a housing groove 30a, a second circumferential groove CH2, a first friction portion 31, a fluid inlet 32, and a fluid outlet 33.

The receiving groove 30a receives one end of the bolt B inserted into the first bolt-fastening hole BH1, and thus can be formed at a position corresponding to the fastening portion 23 of the rotary member 22 where the first bolt-fastening hole BH1 is formed.

The second circumferential groove CH2 formed on the periphery of the receiving groove 30a may be formed in plurality in such a manner as to have different inner diameters. The second circumferential groove CH2 allows the fluid flowing in the centrifugal force direction inside the friction head 100 to flow in a direction perpendicular to the centrifugal force direction, thereby generating frictional resistance of the fluid.

The portion around the second circumferential groove CH2 and forming the outside of the bottom portion 30 of the cover member 29 may form the first friction portion 31. The first friction portion 31 may be configured in a plurality of rib forms. The frictional resistance may be formed while the fluid flowing inside the friction head 100 collides with the first friction part 31. The first friction part 31 may provide a region capable of forming frictional resistance again to the flowing fluid.

As shown in fig. 4 and 5, in the present invention, as an example, the fluid inlet 32 and the fluid outlet 33 may be formed in a direction perpendicular to the centrifugal force direction of the fluid so that the covering member 29 penetrates the covering member 29 in the vertical direction. The structure as described above may be a structure capable of increasing resistance to fluid flow in the centrifugal force direction. Therefore, the following structure can be realized: the problem that the centrifugal force of the portion of the fluid sucked into the friction head 100 and discharged is rapidly decreased is prevented, and the frictional resistance against the fluid is further increased. As a result, the heating efficiency of the fluid is improved, and the fluid can be heated more quickly.

In the present invention, as an example, the fluid inlet 32 and the fluid outlet 33 are illustrated and described as being formed in the cover member 29 in the direction perpendicular to the centrifugal force direction, but the fluid inlet 32 and the fluid outlet 33 may be provided in at least one of the structures (for example, the cover member 29 and the body member 10) constituting the friction head 100 instead of being formed in the same structure (for example, the cover member 29).

A fourth bolt fastening hole BH4 that can be fastened with a bolt to the body member 10 may be formed in the edge portion 34 of the cover member 29. Therefore, the cover member 29 can be coupled to the body member 10 to seal the internal space of the friction head 100.

Referring to fig. 6 to 10, a space between the bottom 11 of the body member 10 and the one face 22a of the rotation member 22, which is one of the collision friction region CF and the surface friction region SF, will be specifically described.

The surface friction region SF may be formed in at least one of a space between the bottom portion 11 of the body member 10 and the one surface 22a of the rotating member 22 and a space between the bottom portion 30 of the cover member 29 and the other surface 22b of the rotating member 22. In the description with reference to fig. 6 to 10, the surface friction region SF formed in the space between the bottom portion 11 of the body member 10 and the one surface 22a of the rotary member 22 will be described as an example.

As shown in fig. 6, the body member 10 may form a space for accommodating the rotation member 22 by the bottom portion 11 and the edge portion 13 formed at the outer side of the bottom portion 11 to protrude from the bottom portion 11.

In the drawing of fig. 6, the rotation member 22 may be a structure provided on the upper side of the bottom portion 11 of the body member 10.

The friction head 100 may form the collision friction area CF through a space between the edge sidewall 14 of the body member 10 and the profile 28 of the rotational member 22. In the collision friction region CF, the fluid may be collided with the rim side wall 14 by the rotating member 22 and heated by friction.

The collision friction portion 15 is formed in a concave-convex shape by the semicircular cross-section portion 15a and the inclined protrusion portion 15b, and the second friction portion 28a may be formed in a plurality of rib shapes. By the above shape, a greater frictional resistance can be generated in the fluid. Therefore, the fluid heating efficiency in the collision friction region CF can be improved.

The through inflow hole 26 of the rotating member 22 allows the fluid flowing inside the friction head 100 to pass therethrough. In this case, the fluid may pass through the through inflow hole 26 in a direction perpendicular to the centrifugal force direction while being subjected to frictional resistance. The structure including the through inflow hole 26 between the pushing ribs RB of the rotary member 22 may be the following structure: the frictional resistance of the fluid in the collision friction region CF and the surface friction region SF inside the friction head 100 is further increased. Therefore, the heating of the fluid by the frictional heat can be more effectively achieved.

Fig. 7 conceptually illustrates a diagram of the flow of the fluid in the surface friction region SF in the rotation direction S of the rotary member 22 according to the present invention.

As shown in fig. 7, the rotary member 22 can rotate in a clockwise direction, for example. In fig. 7, arrows illustrated adjacent to the peripheries of the first and second impelling ribs RB1, RB2 indicate the flow direction of the fluid according to the rotation direction of the rotary member 22.

As shown in fig. 7, the fluid can flow along the inclined surfaces 24 of the first and second impelling ribs RB1, RB2 included in the one surface 22a and the other surface 22b by the rotation of the rotary member 22.

The inclined surfaces 24 of the first and second pushing ribs RB1 and RB2 may allow the fluid to receive frictional resistance according to the rotation direction of the rotary member 22 while flowing in the surface friction region SF.

As shown in fig. 7, the fluid flows along the inclined surfaces 24 of the first and second pushing ribs RB1 and RB2, and may flow through the inflow hole 26 or in the direction of the next adjacent pushing rib (the next adjacent first pushing rib RB1 in the case of the first pushing rib RB1, and the next adjacent second pushing rib RB2 in the case of the second pushing rib RB 2).

In the process as described above, the first and second circumferential grooves CH1 and CH2 included at positions corresponding to the first and second pushing ribs RB1 and RB2, respectively, may receive a rotational force along the first and second circumferential grooves CH1 and CH2 while allowing the fluid to exist in the surface friction region SF.

The fluid flowing along the inclined surface 24 of the second spouting rib RB2 can have a flow flowing along the inclined surface 24 of the first spouting rib RB1 by passing through the inflow hole 26. In addition, there may be a flow flowing along the inclined surface 24 of the next second spouting rib RB2 adjacent to the second spouting rib RB2 without passing through the inflow hole 26.

In addition, the fluid may also flow in the rotational direction along the inclined surface 24 of the first impelling rib RB1 at the surface friction region SF of the space between the first circumferential groove CH1 and the first impelling rib RB 1. At this time, the fluid may be continuously present in the surface friction region SF of the space between the first circumferential groove CH1 and the first push rib RB1 by the fluid flowing along the first circumferential groove CH 1.

The fluid flowing in the rotation direction along the inclined surface 24 of the first spouting rib RB1 can flow along the inclined surface 24 of the second spouting rib RB2 by passing through the inflow hole 26 and also flow along the inclined surface of the next first spouting rib RB1 adjacent to the first spouting rib RB 1.

In the surface friction region SF, the fluid may form a flow flowing from the inclined surface 24 of the first impelling rib RB1 along the inclined surface 24 of the second impelling rib RB2 or from the inclined surface 24 of the second impelling rib RB2 along the inclined surface 24 of the first impelling rib RB1 by penetrating the inflow hole 26. In this case, a vortex is generated by the fluid whose flow direction crosses in the up-down direction in the through inflow hole 26, and the temperature of the fluid can be raised more rapidly.

In the surface friction region SF, the first and second pushing ribs RB1 and RB2 and the first and second circumferential grooves CH1 and CH2 allow the fluid, which is subjected to the rotational force and the centrifugal force by the rotational force of the rotational member 22, to flow along the inclined surfaces 24 of the first and second pushing ribs RB1 and RB2, to pass through the inflow hole 26, and have a structure in which the flow direction crosses in the up-down direction, so that the process of rubbing the fluid and increasing the temperature in the surface friction region SF can be continuously performed. Accordingly, the friction head 100 of the present invention may have the following structure: the temperature rise region due to the friction of the fluid is present not only in the outer region of the friction head 100 but also in the direction of the inner region. As a result, the function of warming up the fluid in the friction head 100 can be achieved more quickly and efficiently.

As shown in fig. 8 to 10, a space between the edge side wall 14 of the body member 10 and the outer profile 28 of the rotary member 22 is formed, so that the collision friction area CF may be formed.

The distance between the collision friction portion 15 of the edge side wall 14 and the second friction portion 28a of the rotary member 22 included in the collision friction region CF is very narrow. Therefore, the fluid can strongly collide with the collision friction portion 15 by the rotation of the rotary member 22 and flow in the rotation direction of the rotary member 22. In the process as described above, the rise in the fluid temperature due to friction can be achieved in the collision friction region CF.

The surface friction region SF may be formed by a first circumferential groove CH1 formed in the bottom surface 11a of the bottom portion 11 of the body member 10, and a first push rib RB1 of one face 22a of the rotary member 22 in the direction opposite to the first circumferential groove CH 1.

The fluid may flow into the first circumferential groove CH1 formed in the direction perpendicular to the centrifugal force direction. In the process as described above, frictional resistance may be generated. In addition, the fluid flowing by the rotation of the first push rib RB1 rotating in the direction opposite to the first circumferential groove CH1 may collide with the fluid flowing into the first circumferential groove CH 1. Therefore, in the surface friction region SF, a process of heating the fluid by the frictional heat may be performed.

The friction head 100 may form the collision friction region CF and the surface friction region SF by a structure including the body member 10, the rotation member 22, and the cover member 29. In the above-described structure, the respective configurations included in the configurations (for example, the collision friction portion 15 and the first circumferential groove CH1) formed in the body member 10, the configurations (for example, the first thrust rib RB1 and the second thrust rib RB2) formed in the rotary member 22, and the configuration (for example, the second circumferential groove CH2) formed in the cover member 29 may interact with each other, thereby increasing the frictional resistance of the fluid. As a result, the present invention can heat the fluid more effectively in the impact friction region CF and the surface friction region SF of the friction head 100, thereby rapidly and effectively heating the fluid.

The friction head 100 of the present invention as described above constitutes a boiler, and can rapidly raise the temperature of a fluid. In this case, the boiler may include a motor 200, a friction head 100, and a tank, wherein the friction head 100 includes: a body member 10 including a bottom 11 having a through hole 12 through which a rotating shaft 200a of the motor 200 passes and a peripheral side wall formed outside the bottom 11; a cover member 29 covering the body member 10; a rotating member 22 rotatably provided by coupling the rotating shaft 200a of the motor 200 between the body member 10 and the cover member 29; a collision friction region CF formed in a space between the edge side wall 14 of the body member 10 and the outer profile 28 of the rotary member 22, thereby warming the fluid; and a surface friction region SF formed in at least one or more of a space between the bottom portion 11 of the body member 10 and the one surface 22a of the rotation member 22 and a space between the bottom portion 30 of the cover member 29 and the other surface 22b of the rotation member 22 to heat the fluid, wherein the tank stores the fluid heated by the friction head.

The boiler of the present invention can rapidly and effectively heat fluid by the friction head 100 including the collision friction area CF and the surface friction area SF inside. Accordingly, the function of heating the room can be performed using the fluid which is rapidly heated in a relatively short time.

As described above, although the present invention has been described with reference to the preferred embodiments, a person skilled in the relevant art can make modifications and variations to the present invention without departing from the spirit and scope of the present invention as set forth in the following claims.

Claims

1. A friction head, comprising:

a body member including a bottom portion having a through hole through which a rotating shaft of a motor passes and a peripheral side wall formed to protrude outside the bottom portion;

a cover member covering the body member;

a rotating member rotatably coupled to the rotating shaft of the motor between the body member and the cover member;

a collision friction region formed in a space between the edge side wall of the body member and a profile of the rotating member, thereby warming a fluid; and

and a surface friction region formed in at least one of a space between the bottom portion of the body member and one surface of the rotating member and a space between the bottom portion of the cover member and the other surface of the rotating member, to heat the fluid.

2. The friction head as recited in claim 1 wherein

The collision friction area includes:

a collision friction part formed on the side wall of the edge,

the collision friction portion includes semi-circular section portions and inclined protruding portions formed continuously with the semi-circular section portions between the semi-circular section portions,

the inclined protrusion protrudes in an inner direction of the body member, and an end of the inclined protrusion is formed to be inclined toward one side.

3. The friction head as recited in claim 1 wherein

The surface friction region includes:

at least one first circumferential groove formed on the bottom of the body member, and at least one first urging rib provided on the one face of the rotating member.

4. The friction head as recited in claim 1 wherein

The surface friction region includes:

at least one second circumferential groove formed on the bottom of the cover member, and at least one second urging rib provided on the other face of the rotary member.

5. The friction head of claim 1, comprising:

a fluid inlet and a fluid outlet formed in the covering member.

6. The friction head of claim 1, comprising:

a fluid inflow port provided to allow the fluid to flow into the interior of the body member in a direction parallel to the rotation axis of the motor,

a fluid discharge port provided to discharge the fluid to an outside of the body member in a direction parallel to the rotation axis of the motor.

7. The friction head as recited in claim 5 wherein

A fluid inlet portion is formed at a position corresponding to the fluid inlet port of the body member, and a fluid outlet portion is formed at a position corresponding to the fluid outlet port of the body member,

a bottom surface of the fluid inflow portion is formed to be inclined downward in a rotation direction of the rotation member, and a bottom surface of the fluid discharge portion is formed to be inclined upward in the rotation direction of the rotation member.

8. The friction head as recited in claim 7 wherein

An impact friction portion formed on the edge side wall is formed in a circumferential direction from the fluid inflow portion to the fluid discharge portion,

the collision friction portion is not formed on the edge side wall in a circumferential direction from the fluid discharge portion to the fluid inflow portion.

9. The friction head as recited in claim 5 wherein

At least a part of the outer contour of the rotating member is exposed through the fluid inlet and the fluid outlet.

10. The friction head as recited in claim 1 wherein

The body member includes a fastening flange bolted to a flange portion of the motor.

11. A friction head, comprising:

a cover member fastened to the body member and including a fluid inflow port and a fluid discharge port;

a collision friction region formed between a collision friction portion formed on the edge side wall and an outer contour portion of the rotating member, and configured to move a fluid in a rotating direction of the rotating member along the collision friction portion formed on the edge side wall and to increase a temperature of the fluid; and

and a surface friction region formed at least either between the bottom portion of the body member and one surface of the rotating member facing the bottom portion or between the cover member and the other surface of the rotating member facing the cover member, the surface friction region guiding a flow of the fluid in a surface direction perpendicular to a direction of a centrifugal force generated when the rotating member rotates and heating the fluid.

12. The friction head as recited in claim 11 wherein

The edge sidewall includes: a circular section including the collision friction portion and two arc-shaped sections which do not include the collision friction portion and are convex outward,

at least one of the arc-shaped sections is a fluid inflow portion formed in the body member so as to correspond to the fluid inflow port, and the remaining one is a fluid discharge portion formed in the body member so as to correspond to the fluid discharge port.

13. A boiler, comprising:

a motor;

a friction head comprising:

a body member including a bottom portion having a through hole through which a rotating shaft of the motor passes and a peripheral side wall formed outside the bottom portion;

a cover member covering the body member;

a rotating member rotatably provided between the body member and the cover member in such a manner as to be coupled to the rotating shaft of the motor;

a surface friction region formed in at least one or more of a space between the bottom portion of the body member and one surface of the rotating member and a space between the bottom portion of the cover member and the other surface of the rotating member, to heat the fluid; and

a tank storing the fluid heated by the friction head.

14. The boiler according to claim 13, wherein

The fastening flange of the body member is joined to a mounting portion formed in a flange portion of the motor by bolts.