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JP-7856251-B2 - Heating device

JP7856251B2JP 7856251 B2JP7856251 B2JP 7856251B2JP-7856251-B2

Inventors

  • 木谷 悟
  • 渡辺 健太郎
  • 村上 雄紀
  • 松村 昌典

Assignees

  • 株式会社ユタカ技研
  • 国立大学法人北海道国立大学機構

Dates

Publication Date
20260511
Application Date
20230719

Claims (9)

  1. A sealed container with an annular first stator fixed inside in a non-rotatable manner, The fluid filled in the sealed container, An annular pump is rotatably positioned inside the sealed container opposite the first stator, forming a helical fluid flow path between it and the first stator, A power transmission shaft is provided, which supports the pump at one end in a non-rotatable manner and connects the other end, which protrudes from the sealed container, to a power source for rotational power. A bearing member that rotatably supports the power transmission shaft in the sealed container, Between the pump and the first stator, a second stator is fixed to the sealed container in a way that prevents rotation and allows for removal. The sealed container comprises a heat dissipation section provided on the outer wall of the sealed container, A heating device characterized by stirring the fluid in the helical channel using the power of the aforementioned power source, and releasing the heat generated by fluid friction from the fluid through the heat dissipation section to perform heat exchange with an external heat transfer medium.
  2. A heating device according to claim 1, The heating device is characterized in that the first and second stators each have a stator hub on their inner circumference, and the first stator hub of the first stator has an anti-rotation portion that can detachably fix the second stator hub of the second stator.
  3. A heating device according to claim 1 or claim 2, The heating device is characterized in that the first and second stators each have the same number of stator blades, and the second stator is removably fixed to the sealed container such that the second stator blades of the second stator can be mounted relative to the first stator blades of the first stator at any phase.
  4. A heating device according to claim 1 or claim 2, The heating device is characterized in that the second stator has a different number of second stator blades than the number of first stator blades of the first stator, and is detachably fixed to the sealed container.
  5. A heating device according to claim 2, The heating device is characterized in that the first stator is formed integrally with the sealed container, and the first stator hub has a sealing portion for sealing the fluid inside the sealed container between itself and the power transmission shaft, and a bearing member for rotating the power transmission shaft inside the sealed container.
  6. A heating device according to claim 1, The aforementioned sealed container is characterized in that the power transmission shaft, which extends parallel to the direction of gravity, protrudes from its upper surface.
  7. A heating device according to claim 1 or claim 6, The heat dissipation section is characterized in that at least a portion of it overlaps with the helical flow path in the radial direction.
  8. A heating device according to claim 1 or claim 6, The heat generating device is characterized in that the sealed container is housed in a hot water storage tank filled with a heat transfer medium and sealed, the other end of the power transmission shaft protrudes from the hot water storage tank, a circulation pipe is connected between the hot water storage tank and a heat exchanger located outside the hot water storage tank for circulating the heat transfer medium between the hot water storage tank and the heat exchanger, and a plurality of stirring blades extending radially from the outer circumference of the power transmission shaft are attached to the power transmission shaft outside the sealed container inside the hot water storage tank so as to cover at least a portion of the heat dissipation part of the sealed container.
  9. A heating device according to claim 8, A heating device characterized in that the extension of the circulation piping that extends from the inlet of the circulation piping to the hot water storage tank into the hot water storage tank opens on the inner circumference side of the stirring blade.

Description

The present invention relates to a heat generating device comprising: a sealed container with a stator fixed immovably inside; a fluid filled in the sealed container; a pump rotatably positioned inside the sealed container opposite the stator and forming a helical flow path for the fluid between itself and the stator; a power transmission shaft that immovably supports the pump at one end and connects the other end, which protrudes from the sealed container, to a power source for rotational power; and a bearing member that rotatably supports the power transmission shaft in the sealed container. The device converts rotational energy into thermal energy by rotating the pump with the rotational power of the power source and agitating the fluid inside the sealed container. It is known, as disclosed in Patent Document 1, that such a heating device can be connected to a power source such as a wind turbine or an axial flow turbine to agitate a fluid filled in a sealed container, and the fluid heated by the agitation can be extracted to the outside as thermal energy. Japanese Public Gazette No. 58-49005 Figure 1 is a schematic longitudinal cross-sectional view showing the configuration when the heating device of the first embodiment is installed in a water tank and connected to a vertical-axis wind turbine and a heat exchange device.Figure 2 is an enlarged view of section A in Figure 1.Figure 3(A) is a schematic plan view showing the overlap of the first and second stator blades when the phases of the first and second stators are aligned and superimposed in the heating device of the first embodiment, and Figure 3(B) is a schematic plan view when the phases of the two are different and superimposed. Figure 3(C) is a graph showing the change in pump capacity τ in response to the change in the phase of both stators.Figure 4(A) is a schematic plan view showing the degree of overlap of the first and second stator blades when the first and second stators are stacked in the heating device of the second embodiment, and Figure 4(B) is a graph showing the change in pump capacity τ with respect to the change in phase of both stators.Figure 5 is a schematic longitudinal cross-sectional view showing the configuration of the heating device of the third embodiment when installed in a water tank.Figure 6 is a schematic plan view showing the stirring blade of the third embodiment. The first to third embodiments of the present invention will be described below with reference to the attached drawings. The heating device 1 of the first embodiment, as shown in Figure 1 and Figure 2 (an enlarged view of section A in Figure 1), comprises an annular first stator 2 having a plurality of first stator blades 2a arranged at equal intervals in the circumferential direction; a sealed container 3 in which the first stator 2 is fixed immovably inside; fin-shaped heat dissipation sections 4 provided on the outer wall of the sealed container 3; oil 5 as a liquid filled inside the sealed container 3; an annular pump 6 having a plurality of blades 6a facing the first stator blades 2a of the first stator 2, rotatably arranged inside the sealed container 3, and forming a spiral flow path 7 for the oil 5 between itself and the first stator 2; a power transmission shaft 8 that immovably supports the hub 6b of the pump 6 on one end 8a side, and connects the other end 8b protruding from the sealed container 3 to a wind turbine 9 as a power source for rotational power; and a second stator 10 fixed immovably and removablely to the sealed container 3 between the pump 6 and the first stator 2. The sealed container 3 is housed within a sealed hot water storage tank 12 filled with a heat transfer medium 11 such as water. It is fixedly positioned on the floor 13 of a building or the like, with the power transmission shaft 8 facing the direction of gravity, and is sealed by the joint between its upper half 3a and lower half 3b. A circulation pipe 15 is connected between the hot water storage tank 12 and the external heat exchanger 14, circulating the heat transfer medium 11 between the tank and the heat exchanger 14. A circulation pump (not shown) is interposed in the middle of the circulation pipe 15. A base 12b for securing the sealed container 3 is fixed to the floor surface 12a of the hot water storage tank 12. Heat transfer fluid 11 flows between the upper surface of the base 12b and the lower surface of the lower half 3b of the sealed container 3, performing heat exchange with the oil 5 inside the sealed container 3. The circulation piping 15 is attached to the side wall of the hot water storage tank 12, with its inlet 15a facing downwards and its outlet 15b facing upwards. A sealing member 12c is positioned where the power transmission shaft 8 protrudes from the hot water storage tank 12. As shown in Figure 2, in this embodiment, the first stator 2 is formed in the upper half 3a of the sealed container 3 so as to constitute a part of the sealed container 3.