Fluid heating device and fluid heating system

Abstract

To provide a fluid heating device and a fluid heating system capable of being miniaturized.SOLUTION: A fluid heating device according to an embodiment includes a tubular portion having a tubular shape, a plurality of coils provided on an inner wall side of the tubular portion, a pair of support plates provided inside the tubular portion, having an annular shape, and provided to face each other in a direction along a central axis of the tubular portion, and at least one heating flow portion provided between the pair of support plates. The heating flow portion includes a base portion having a plate shape and extending between the pair of support plates, and a heat generation portion provided on at least one surface of the base portion, having conductivity, and extending in a direction in which the base portion extends.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] FIELD OF THE INVENTION Embodiments of the present invention relate to fluid heating devices and fluid heating systems. [Background technology]

[0002] 2. Description of the Related Art There are heaters that heat fluids such as air and water. Heaters that heat fluids are provided, for example, in hot air devices that heat air and in hot water devices that heat water.

[0003] One such heater proposed is a PTC (Positive Temperature Coefficient) heater. When a current flows through a PTC heater, the temperature of the PTC heater rises in accordance with the magnitude of the current. When the temperature of the PTC heater exceeds the Curie temperature, the resistance of the PTC heater increases, making it difficult for current to flow through the PTC heater, and the temperature rise of the PTC heater is suppressed. When the temperature of the PTC heater drops due to the suppression of the temperature rise of the PTC heater, current flows more easily through the PTC heater, and the temperature of the PTC heater rises again. Therefore, the use of a PTC heater allows for self-control of the heating temperature.

[0004] However, when using a PTC heater, heat exchange fins are required to transfer the heat generated in the PTC heater to the fluid, and a fan (e.g., a blower) or a liquid transport device (e.g., a pump) is required to supply fluid to the heat exchange fins.

[0005] Therefore, when a PTC heater is used, there is a problem in that it becomes difficult to reduce the size of the fluid heating device, and in turn, to reduce the size of the fluid heating system equipped with the fluid heating device.

[0006] Therefore, there has been a demand for the development of a fluid heating device and a fluid heating system that can be made smaller. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-054934 Summary of the Invention [Problem to be solved by the invention]

[0008] An object of the present invention is to provide a fluid heating device and a fluid heating system that can be made smaller. [Means for solving the problem]

[0009] A fluid heating device according to an embodiment includes a cylindrical portion, a plurality of coils provided on the inner wall side of the cylindrical portion, a pair of annular support plates provided inside the cylindrical portion and facing each other in a direction along the central axis of the cylindrical portion, and at least one heating flow portion provided between the pair of support plates. The heating flow portion includes a plate-shaped base portion extending between the pair of support plates, and a heat generating portion provided on at least one surface of the base, which is electrically conductive and extends in the direction of extension of the base. [Effects of the Invention]

[0010] According to the embodiments of the present invention, it is possible to provide a fluid heating device and a fluid heating system that can be made smaller in size. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic diagram illustrating a fluid heating system including a fluid heating device according to an embodiment of the present invention. [Figure 2] FIG. 1 is a schematic perspective view illustrating a fluid heating device. [Figure 3] FIG. 2 is a schematic plan view illustrating a heating and fluidizing section. [Figure 4] 10(a) and 10(b) are schematic plan views illustrating a heating fluidization section according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments will be illustrated with reference to the drawings. In the drawings, like components are designated by like reference numerals and detailed descriptions thereof will be omitted where appropriate.

[0013] The fluid heating device 1 according to this embodiment causes the fluid 200 to flow and heats the fluid 200. The fluid 200 may be, for example, a gas (e.g., air) contained in the environment in which the fluid heating device 1 is installed, or a liquid such as water or a solution (e.g., coolant liquid, etc.). However, the type of the fluid 200 is not limited to those exemplified.

[0014] FIG. 1 is a schematic diagram illustrating a fluid heating system 100 including a fluid heating device 1 according to this embodiment. As shown in FIG. 1, a fluid heating system 100 includes, for example, a fluid heating device 1, a supply unit 101, a discharge unit 102, and a controller 103.

[0015] FIG. 2 is a schematic perspective view illustrating the fluid heating device 1. As shown in FIG. As shown in FIG. 2, the fluid heating device 1 includes, for example, a rotating part 2 and a fixed part 3.

[0016] The rotating part 2 is provided inside the cylindrical part 31 of the fixed part 3, and rotates, for example, around a central axis 2a. The rotating part 2 includes, for example, a support part 21 and a heating fluid part 22. There may be a pair of support parts 21. The support part 21 has, for example, a support plate 21a and a rotation shaft 21b.

[0017] The support plate 21a has, for example, an annular shape, and is disposed opposite to each other in the direction along the central axis 2a.

[0018] The rotating shaft 21b has, for example, a cylindrical shape and is provided inside the annular support plate 21a. In the direction along the central axis 2a, the rotating shaft 21b extends outside the rotating part 2. The central axis of the pair of rotating shafts 21b is approximately coaxial with the central axis 2a.

[0019] 1, one rotating shaft 21b is rotatably supported via a bearing or other bearing on a bracket 101b1 provided on a supply pipe 101b of the supply unit 101. The other rotating shaft 21b is rotatably supported via a bearing or other bearing on a bracket 102a1 provided on a discharge pipe 102a.

[0020] The support plate 21a and the rotating shaft 21b may be made of a metal such as iron.

[0021] At least one heating fluidization section 22 can be provided between a pair of support plates 21a. The rotating section 2 illustrated in Fig. 2 is provided with eight heating fluidization sections 22. When providing multiple heating fluidization sections 22, the multiple heating fluidization sections 22 can be provided, for example, at positions that are rotationally symmetrical with respect to each other about the central axis 2a.

[0022] FIG. 3 is a schematic plan view illustrating the heating and fluidizing section 22. As shown in FIG. As shown in FIG. 3, the heating fluidization section 22 has, for example, a base section 22a, a heat generating section 22b, and a protective section 22c.

[0023] 2 and 3, the base 22a is plate-shaped and extends between the pair of support plates 21a. An end of the base 22a is provided on each of the pair of support plates 21a. The base 22a serves as a base for supporting the heat generating portion 22b and the protective portion 22c, and also serves as a fin for circulating the fluid 200 when the rotating portion 2 rotates.

[0024] Therefore, when viewed from the direction along the central axis 2a, the surface of the base 22a on which the heat generating portion 22b and the protective portion 22c are provided can be inclined with respect to the tangent line of the support plate 21a, which makes it easier for the base 22a to cause the fluid 200 to flow when the rotating portion 2 rotates.

[0025] The base 22a can be made of, for example, a metal such as iron, or ceramics. As will be described later, a current caused by electromagnetic electromotive force flows through the heat flow portion 22. Therefore, when the base 22a is made of ceramics, the heat generating portion 22b, which has electrical conductivity, can be electrically connected to the pair of support plates 21a. In this way, even if the base 22a has insulating properties, a current caused by electromagnetic electromotive force can be passed through the heat flow portion 22.

[0026] Furthermore, a current caused by electromagnetic electromotive force flows at least through the heat generating portion 22b. When a current flows through the heat generating portion 22b, heat (Joule heat) is generated. Therefore, if the heat generating portion 22b is provided, the fluid 200 can be heated.

[0027] Heat generating portion 22b is, for example, electrically conductive and can be provided on at least one surface of base portion 22a. Heat generating portion 22b is linear and extends in the same direction as base portion 22a.

[0028] The electrical resistance value per unit length of the heat generating portion 22b can be approximately uniform in the direction in which the heat generating portion 22b extends, or can vary. For example, the electrical resistance value per unit length of the heat generating portion 22b illustrated in FIG. 3 is approximately uniform in the direction in which the heat generating portion 22b extends. For example, the width and thickness of the heat generating portion 22b are approximately constant. To change the electrical resistance value per unit length of the heat generating portion 22b, it is sufficient to change at least one of the width and thickness. The length, width, and thickness of the heat generating portion 22b can be changed as appropriate depending on the amount of heat generated by the fluid heating device 1.

[0029] Heat generating portion 22b can be formed using, for example, ruthenium oxide (RuO), a silver-palladium (Ag-Pd) alloy, a silver-platinum (Ag-Pt) alloy, etc. Heat generating portion 22b can be formed, for example, by applying a paste-like material to the surface of base portion 22a using a screen printing method or the like, and then hardening it using a baking method or the like.

[0030] Protective portion 22c is provided, for example, on the surface of base portion 22a on which heat generating portion 22b is provided. Protective portion 22c covers heat generating portion 22b. Protective portion 22c has, for example, a function of transferring heat generated in heat generating portion 22b to the outside and a function of protecting heat generating portion 22b from external forces, fluid 200 to be heated, and the like.

[0031] The protective portion 22c is formed from a material that is heat-resistant and insulating, and has high chemical stability and thermal conductivity. The protective portion 22c is formed from, for example, a glass material. In this case, the protective portion 22c can also be formed from a glass material to which a filler containing a material with high thermal conductivity, such as aluminum oxide, has been added. The thermal conductivity of the glass material to which the filler has been added can be, for example, 2 [W / (m·K)] or more. The thickness of the protective portion 22c can be, for example, approximately 20 μm to 80 μm.

[0032] The protective portion 22c can be formed, for example, by applying a paste material onto the surface of the base portion 22a and the heat generating portion 22b using a screen printing method or the like, and then hardening it using a baking method or the like.

[0033] 2, the fixed part 3 surrounds the rotating part 2. The fixed part 3 has, for example, a cylindrical part 31 and a coil 32.

[0034] The cylindrical portion 31 has a cylindrical shape and has a plurality of protrusions on its inner wall surface. The central axis of the cylindrical portion 31 can be approximately coaxial with the central axis 2a of the rotating portion 2. The coil 32 is provided on the inner wall side of the cylindrical portion 31. For example, the coil 32 is wound around the protrusions of the cylindrical portion 31. The cylindrical portion 31 is made of a magnetic material such as an electromagnetic steel plate.

[0035] For example, three coils 32 are provided. The three coils 32 are provided at positions that are rotationally symmetrical with respect to one another about the central axis 2a. When viewed from the direction along the central axis 2a, a portion of one coil 32 is provided on one side of the cylindrical portion 31, and the remaining portion of one coil 32 is provided on the opposite side of the cylindrical portion 31.

[0036] Next, the operation of the fluid heating device 1 will be described. When a three-phase alternating current is applied to the three coils 32 by the controller 103 (described later), a rotating magnetic field is generated inside the cylindrical portion 31. The generation of the rotating magnetic field generates an electromagnetic electromotive force at least in the heat generating portion 22b of the heating fluidization portion 22. Because the heat generating portion 22b is connected to the support plate 21a, when an electromagnetic electromotive force is generated in the heat generating portion 22b, a current flows from one end of the heat generating portion 22b to the other end. The current flowing through the heat generating portion 22b and the aforementioned magnetic flux generate an electromagnetic force in the heat generating portion 22b. In this case, according to Fleming's left-hand rule, the electromagnetic force acts in a direction that rotates the base portion 22a on which the heat generating portion 22b is provided, around the central axis 2a. Rotating the plate-shaped base portion 22a around the central axis 2a causes the fluid 200 to flow in a direction along the central axis 2a.

[0037] Furthermore, when a current flows through the heat generating portion 22b, heat (Joule heat) is generated, and therefore the fluid 200 in contact with the heating fluid portion 22 can be heated.

[0038] The fluid heating device 1 according to this embodiment can both circulate and heat the fluid 200. Therefore, the fluid heating device 1 can be made smaller than when a heating device such as a heater and a blower, liquid feeder, or the like are provided separately. Furthermore, if the fluid heating device 1 can be made smaller, the fluid heating system 100 in which the fluid heating device 1 is provided can also be made smaller. Furthermore, since the configuration can be simplified, the manufacturing costs can be reduced.

[0039] Next, returning to FIG. 1, the supply unit 101, the discharge unit 102, and the controller 103 provided in the fluid heating system 100 will be described. The supply unit 101 includes, for example, a container 101a and a supply pipe 101b.

[0040] The container 101a is box-shaped and contains a fluid 200 to be heated. When the fluid 200 to be heated is a liquid, the container 101a may be, for example, a tank for storing the liquid. When the fluid 200 to be heated is a gas, the container 101a may be, for example, a cylinder for storing the gas. Furthermore, when the fluid 200 to be heated is air in the atmosphere in which the fluid heating device 1 is installed, the container 101a may be omitted. In this case, a filter or the like may be provided instead of the container 101a.

[0041] The supply pipe 101b has a tubular shape. For example, one end of the supply pipe 101b is connected to the container 101a, and the other end is connected to the cylindrical portion 31 of the fixed part 3. The supply pipe 101b can also be connected to the container 101a via a pipe or the like. Furthermore, a bracket 101b1 that rotatably supports the rotation shaft 21b of the rotating part 2 via a bearing or the like can be provided inside the supply pipe 101b.

[0042] The discharge section 102 includes, for example, a discharge pipe 102a and a container 102b. The discharge pipe 102a has a tubular shape. For example, one end of the discharge pipe 102a is connected to the cylindrical portion 31 of the fixed portion 3. The discharge pipe 102a is provided on the side of the cylindrical portion 31 opposite to the side on which the supply pipe 101b is provided. In this case, the central axis of the supply pipe 101b and the central axis of the discharge pipe 102a can be made approximately coaxial.

[0043] In this way, the cylindrical portion 31 can be provided between the supply pipe 101b and the discharge pipe 102a. Therefore, the cylindrical portion 31 can be exposed to the outside, which makes it easy to electrically connect the coil 32 and the controller 103.

[0044] Furthermore, a bracket 102a1 that rotatably supports the rotation shaft 21b of the rotating part 2 via a bearing or the like can be provided inside the discharge pipe 102a.

[0045] For example, supply pipe 101b can be the same as discharge pipe 102a. Alternatively, supply pipe 101b and discharge pipe 102a can be integrated, and fluid heating device 1 can be provided inside the integrated supply pipe 101b and discharge pipe 102a. In this case, if fluid 200 is conductive, coil 32 and the like can be insulated using silicone resin or the like.

[0046] The container 102b is box-shaped and stores the heated fluid 200. In addition, when the fluid 200 heated by the fluid heating device 1 is consumed, such as in a hot water device or a hot air device, a nozzle for discharging the heated fluid 200 can be provided instead of or together with the container 102b.

[0047] Furthermore, when the fluid 200 is used as a heat medium, the heated fluid 200 can be supplied to the member 104 to be heated, instead of or via the container 102b. For example, if the temperature of a battery mounted on an EV (Electric Vehicle) becomes too low, the rate of chemical reactions occurring within the battery slows down, and the amount of electricity that can be generated decreases. In such a case, the heated fluid 200 (e.g., coolant liquid) can be supplied to the outer wall of the battery, etc., to keep the temperature of the battery within an appropriate range.

[0048] Furthermore, when the fluid 200 is used as a heat transfer medium, the fluid 200 discharged from the member 104 to be heated (the fluid used to heat the member 104) can be collected and reused. For example, as shown in FIG. 1, the fluid 200 discharged from the member 104 can be returned to the supply unit 101 side. In this way, the fluid 200 circulates between the member 104 and the supply unit 101 side, which can reduce the consumption of the fluid 200 and reduce the power consumption of the heat generating unit 22b of the fluid heating device 1 by reheating the high-temperature fluid 200.

[0049] The controller 103 controls the operation of each element provided in the fluid heating system 100. The controller 103 may include, for example, a computer and a three-phase AC power supply.

[0050] For example, the controller 103 applies a three-phase alternating current to three coils 32 provided on the fixed part 3 of the fluid heating device 1. Then, as described above, an electromagnetic force is generated in the heat generating part 22b provided in the heating fluid part 22, causing the rotating part 2 provided with the heating fluid part 22 to rotate. Because the heating fluid part 22 is provided with the plate-shaped base part 22a, the movement of the base part 22a in the rotational direction forms a flow of the fluid 200 flowing from the supply pipe 101b side toward the discharge pipe 102a side.

[0051] As described above, a current flows through the heat generating portion 22b due to an electromagnetic electromotive force, and the heat generating portion 22b generates heat. Therefore, the fluid 200 flowing from the supply pipe 101b side toward the discharge pipe 102a side is heated when passing through the rotating portion 2.

[0052] In this case, since heat generating portion 22b is immersed in fluid 200, the heat generated in heat generating portion 22b can be directly transferred to fluid 200, and base portion 22a moving in the rotation direction can agitate fluid 200. Therefore, the heating efficiency of fluid 200 can be improved, and temperature unevenness in fluid 200 can be suppressed.

[0053] Furthermore, the controller 103 can be equipped with a current control circuit. If the controller 103 is equipped with a current control circuit, it can increase the amount of heat generated in the heat generating portion 22b by increasing the current applied to the three coils 32, or decrease the amount of heat generated in the heat generating portion 22b by decreasing the current applied to the three coils 32. In other words, if the controller 103 is equipped with a current control circuit, it can control the temperature of the fluid 200.

[0054] Furthermore, the controller 103 may include an inverter circuit. If the controller 103 includes an inverter circuit, it is possible to increase the rotation speed of the rotating part 2 to increase the flow rate of the fluid 200, or decrease the rotation speed of the rotating part 2 to decrease the flow rate of the fluid 200, by controlling the frequency of the current applied to the three coils 32. In other words, if the controller 103 includes an inverter circuit, it is possible to control the flow rate of the fluid 200.

[0055] 4(a) and (b) are schematic plan views illustrating the heating fluidization units 23 and 24 according to other embodiments. As shown in FIG. 4(a), the heating fluidization section 23 has, for example, a base section 22a, a plurality of heat generating sections 22b, and a protective section 22c.

[0056] While the heating flow section 22 described above is provided with one heat generating section 22b, the heating flow section 23 is provided with multiple heat generating sections 22b. In the case of the heating flow section 23 illustrated in FIG. 4(a), two heat generating sections 22b are provided. When multiple heat generating sections 22b are provided, the multiple heat generating sections 22b can be arranged at predetermined intervals in a direction intersecting the direction in which the heat generating sections 22b extend. Note that the number of heat generating sections 22b is not limited to that illustrated in FIG. 4(a). The number of heat generating sections 22b can be changed as appropriate depending on the amount of heat generated by the fluid heating device 1.

[0057] When a plurality of heat generating portions 22b are provided, the protective portion 22c can cover the plurality of heat generating portions 22b.

[0058] As shown in FIG. 4(b), the heating fluidization section 24 has, for example, a base section 24a, a plurality of heat generating sections 22b, and a plurality of protective sections 22c.

[0059] The heating fluidization unit 22 described above has a flat base 22a, but the heating fluidization unit 24 illustrated in Fig. 4(b) has a curved base 24a. In this case, as shown in Fig. 4(b), one heating unit 22b and one protective unit 22c covering it can be provided on each side of the base 24a, or one heating unit 22b and one protective unit 22c covering it can be provided on either side of the base 24a. As described above, it is also possible to provide multiple heating units 22b and one protective unit 22c covering them.

[0060] When the base 24a has a curved shape, one surface of the base 24a can be inclined with respect to a tangent line of the support plate 21a. The material of the base 24a can be the same as the material of the base 22a. The base can also have a curved shape.

[0061] Although the fluid heating system 100 including the supply unit 101 and the discharge unit 102 has been exemplified above, the fluid heating device 1 may be provided in a container such as a tank, for example, to flow (agitate) and heat the liquid stored in the container. Alternatively, the fluid heating device 1 may be provided in an atmosphere, and a gas (e.g., air) in the atmosphere may be flowed (agitated) and heated.

[0062] Although several embodiments of the present invention have been described above, these embodiments are presented by way of example only and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, modifications, etc. can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention and its equivalents as set forth in the claims. Furthermore, the above-described embodiments can be implemented in combination with each other.

[0063] The following are additional notes regarding the above-described embodiment.

[0064] (Appendix 1) A cylindrical portion having a cylindrical shape; a plurality of coils provided on the inner wall side of the cylindrical portion; a pair of support plates provided inside the cylindrical portion, having an annular shape, and facing each other in a direction along the central axis of the cylindrical portion; At least one heating flow section provided between the pair of support plates; Equipped with The heating and flowing section includes: a base portion having a plate shape and extending between the pair of support plates; a heat generating portion provided on at least one surface of the base, having electrical conductivity, and extending in the extending direction of the base; A fluid heating device comprising:

[0065] (Appendix 2) 2. A fluid heating device according to claim 1, wherein the surface of the base is inclined with respect to a tangent to the support plate when viewed from a direction along the central axis.

[0066] (Appendix 3) 3. The fluid heating device according to claim 1, wherein the plurality of heating and fluidizing sections are provided at positions that are rotationally symmetrical with respect to each other about the central axis.

[0067] (Appendix 4) the three coils are provided at positions that are rotationally symmetrical with respect to each other about the central axis, A fluid heating device as described in any one of appendix 1 to 3, wherein when a three-phase alternating current flows through the three coils, a current due to electromagnetic electromotive force flows through at least the heat generating portion, the heat generating portion heats up due to the current, and the base rotates around the central axis due to the electromagnetic force generated by the current.

[0068] (Appendix 5) A fluid heating device according to any one of appendices 1 to 4; a controller for applying an alternating current to a plurality of coils of the fluid heating device; A fluid heating system comprising: [Explanation of symbols]

[0069] 1 fluid heating device, 2 rotating part, 2a central shaft, 3 fixed part, 21 support part, 21a support plate, 21b rotating shaft, 22 heating flow part, 22a base part, 22b heat generating part, 22c protective part, 31 cylindrical part, 32 coil, 100 fluid heating system, 101 supply part, 102 discharge part, 103 controller, 200 fluid

Claims

1. a cylindrical portion having a cylindrical shape; a plurality of coils provided on the inner wall side of the cylindrical portion; a pair of support plates provided inside the cylindrical portion, having an annular shape, and facing each other in a direction along the central axis of the cylindrical portion; At least one heating flow section provided between the pair of support plates; Equipped with The heating and flowing section includes: a base portion having a plate shape and extending between the pair of support plates; a heat generating portion that is provided on at least one surface of the base, has electrical conductivity, and extends in the extending direction of the base; A fluid heating device having:

2. 2. The fluid heating device according to claim 1, wherein the surface of the base is inclined with respect to a tangent to the support plate when viewed in a direction along the central axis.

3. 3. The fluid heating device according to claim 1, wherein the plurality of heating and fluidizing sections are provided at positions that are rotationally symmetrical with respect to each other about the central axis.

4. the three coils are provided at positions that are rotationally symmetrical with respect to one another about the central axis, A fluid heating device as described in claim 1 or 2, wherein when three-phase alternating current flows through the three coils, a current due to electromagnetic electromotive force flows through at least the heat generating portion, the heat generating portion heats up due to the current, and the base rotates around the central axis due to the electromagnetic force generated by the current.

5. The fluid heating device according to claim 1 or 2; a controller for applying an alternating current to a plurality of coils of the fluid heating device; A fluid heating system comprising:

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