Heat generator having built-in heat exchanger

Abstract

[Problem] To provide a heat generator which has a simple structure and converts rotational energy into thermal energy. [Solution] A heat generator 1 having a built-in heat exchanger comprises: a sealed container 3 in which a first stator 2 is non-rotatably fixed; an oil 4 loaded in the sealed container 3; a pump 5 which is rotatably disposed in the sealed container 3 opposite to the first stator 2 and which forms a spiral flow passage 6 of the oil 4 between the first stator 2 and the pump 5; a motive power transmission shaft 7 that non-rotatably supports the pump 5 on the side of one end 7a and connects the other end 7b protruding from the sealed container 3 to a motive power source 8 of rotational motive power; bearing members 9a-9 c that rotatably support the motive power transmission shaft 7 to the sealed container 3; a heat exchanger 12 disposed in the sealed container 3; and an external pipe 13 that is connected to the heat exchanger 12 and that extends outside the sealed container 3.

Description

Heat exchanger built-in heater

[0001] The present invention relates to a heater comprising: a sealed container having a stator fixed therein so as not to rotate; a fluid filled in the sealed container; a pump rotatably disposed within the sealed container opposite the stator and forming a spiral flow path for the fluid between the stator and the pump; a power transmission shaft that non-rotatably supports one end of the pump and has the other end protruding from the sealed container connected to a power source for rotational power; and a bearing member that rotatably supports the power transmission shaft on the sealed container; the pump is rotated by the rotational power of the power source and agitates the fluid in the sealed container, thereby converting rotational energy into thermal energy.

[0002] It is well known, as disclosed in Patent Document 1, to connect such a heater to a power source such as a windmill or an axial flow water turbine to agitate a fluid filled in a sealed container, and extract the fluid heated by the agitation to the outside as thermal energy.

[0003] Japanese Utility Model Publication No. 58-49005

[0004] The device disclosed in Patent Document 1 is configured such that a power transmission shaft 3 supporting a pump 5 at one end thereof is rotated by the rotational power of a power source, while water as a fluid is injected into an inlet 1c of a sealed container. The water accelerated by the blades of the pump 5 collides with the blades 2a of the stator 2 within a spiral flow path, and the rotational energy of the pump 5 is converted into thermal energy to heat the water through this collision. The heated water flows through the gap between the stator 2 and the pump 5 by centrifugal force and flows out to the back side of the pump 5 within the sealed container, and is then discharged from an outlet 8, allowing the rotational energy to be extracted to the outside as thermal energy. However, the sealing structure to prevent the pressurized water in the sealed container from leaking from the power transmission shaft 3 to the bearing section is complex, which increases the number of parts and increases costs, and also has a problem with thermal efficiency because the heated water is directly discharged to the outside.

[0005] The present invention has been proposed in view of the above, and has as its object to provide a compact heater having a simple sealing structure, a reduced number of parts, and excellent thermal efficiency.

[0006] In order to achieve the above object, the present invention is characterized in that it comprises a sealed container having a first stator fixed therein so as not to rotate, oil filled in the sealed container, a pump rotatably arranged within the sealed container opposite the first stator and forming a spiral flow path for the oil between the first stator and the pump, a power transmission shaft supporting the pump non-rotatably at one end and having the other end protruding from the sealed container connected to a power source for rotational power, a bearing member rotatably supporting the power transmission shaft on the sealed container, a heat exchanger arranged within the sealed container, and external piping connected to the heat exchanger and extending to the outside of the sealed container.

[0007] In addition to the first feature, the present invention has a second feature in that a second stator having a hub fixed to the sealed container is disposed between the pump and the first stator in a portion of the spiral flow path downstream of the first stator.

[0008] In addition to the first or second feature, the present invention has a third feature in that the heat exchanger is disposed between the pump and a wall surface of the sealed container.

[0009] Furthermore, in addition to the first or second feature, the present invention has a fourth feature in that the power transmission shaft is arranged parallel to the direction of gravity, and the heat exchanger is arranged between a rear surface of the pump and a ceiling wall of the sealed container.

[0010] Furthermore, in addition to the first or second feature, the present invention has a fifth feature in that at least a portion of the heat exchanger is arranged at a position overlapping the spiral flow path in the radial direction.

[0011] In addition to the first or second feature, the present invention has a sixth feature in that it further comprises a circulation pump for circulating the heat medium in the heat exchanger between the heat exchanger and an external device arranged outside the sealed container, a first mechanical power transmission member fixed to the power transmission shaft outside the sealed container, and a second mechanical power transmission member fixed to the input shaft of the circulation pump outside the sealed container, and the circulation pump is driven by engaging the first mechanical power transmission member with the second mechanical power transmission member.

[0012] In addition to the sixth feature, the present invention has a seventh feature in that the circulation pump is disposed between the sealed container and the second mechanical power transmission member.

[0013] According to a first aspect of the present invention, a heater includes a sealed container having a first stator fixed therein so as not to rotate, oil filled in the sealed container, a pump rotatably disposed within the sealed container opposite the first stator and forming a spiral oil flow path between the pump and the first stator, a power transmission shaft supporting the pump non-rotatably at one end and connecting its other end protruding from the sealed container to a power source for rotational power, and a bearing member rotatably supporting the power transmission shaft on the sealed container. The heater also includes a heat exchanger disposed within the sealed container and external piping connected to the heat exchanger and extending to the outside of the sealed container, thereby easily separating the oil as a heating element from a heat transfer medium such as antifreeze within the heater. This allows the oil as a heating element to always remain within the heater, thereby preventing deterioration of the oil while minimizing the overall size of the device. Furthermore, heat generated by the oil is quickly released to the outside via the heat transfer medium in the heat exchanger, thereby enabling efficient heat exchange.

[0014] According to a second feature of the present invention, a second stator having a hub fixed to the sealed container is disposed between the pump and the first stator, in a portion of the spiral flow path downstream of the first stator. Therefore, even when changing the power source, the characteristics of the heat generator can be adapted to the characteristics of the changed power source simply by replacing the second stator, and the heat generator can always be operated at maximum efficiency according to the characteristics of the power source.

[0015] According to a third feature of the present invention, the heat exchanger is disposed between the pump and the wall surface of the sealed container, so that the heat generated in the spiral flow path can be efficiently transferred to the heat exchanger, thereby improving the heat exchange efficiency.

[0016] According to a fourth feature of the present invention, the power transmission shaft is arranged parallel to the direction of gravity, and the heat exchanger is arranged between the back surface of the pump and the ceiling wall of the sealed container, so that heat convection can be effectively utilized and efficient heat exchange can be achieved.

[0017] According to a fifth feature of the present invention, at least a portion of the heat exchanger is positioned so as to overlap the spiral flow path in the radial direction, so that heat generated in the spiral flow path can be efficiently transferred to the heat exchanger, thereby improving heat exchange efficiency.

[0018] According to a sixth feature of the present invention, the heat exchanger further comprises a circulation pump for circulating the heat medium in the heat exchanger between the sealed container and an external device arranged outside the sealed container, a first mechanical power transmission member fixed to the power transmission shaft outside the sealed container, and a second mechanical power transmission member fixed to the circulation pump input shaft outside the sealed container, and the circulation pump is driven by engaging the first mechanical power transmission member and the second mechanical power transmission member, so that the circulation pump can be driven using only the power of the drive source transmitted to the power transmission shaft without requiring external power, thereby reducing power consumption and improving efficiency.

[0019] Furthermore, according to the seventh feature of the present invention, the circulation pump is disposed between the sealed container and the second mechanical power transmission member, so that the entire device can be made compact even though it is equipped with a circulation pump, and the piping from the heat exchanger to the circulation pump can be shortened, thereby reducing the effects of heat dissipation.

[0020] Fig. 1 is a longitudinal cross-sectional view showing a schematic configuration when a heat exchanger-integrated heater according to an embodiment is applied to a vertical axis wind turbine. Fig. 2 is an enlarged view of part A in Fig. 1. Fig. 3 is a plan view of only the heat exchanger according to the embodiment, as seen from the direction of arrow 3-3 in Fig. 2. Fig. 4 is a plan view of a mechanical power transmission member according to the embodiment, as seen from the direction of arrow 4-4 in Fig. 2.

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

[0022] As shown in FIG. 1 and FIG. 2 which is an enlarged view of portion A of FIG. 1, the heat exchanger-integrated heater 1 of this embodiment includes: an annular first stator 2 having a plurality of blades 2a arranged in the circumferential direction; an airtight container 3 inside which the first stator 2 is fixed so as not to be rotatable; oil 4 filled into the airtight container 3; an annular pump 5 having a plurality of blades 5a opposing the blades 2a of the first stator 2 and rotatably disposed within the airtight container 3, which forms a spiral flow path 6 for the oil 4 between itself and the first stator 2; a power transmission shaft 7 which supports the pump 5 non-rotatably at one end 7a and has the other end 7b protruding from the airtight container 3 connected to a wind turbine 8 as a power source for rotational power; and bearing members 9a to 9c which rotatably support the power transmission shaft 7 in the airtight container 3.

[0023] The sealed container 3 is fixedly disposed in a building or the like (not shown) with the power transmission shaft 7 facing the direction of gravity, and is sealed by joining the upper half 3a and lower half 3b. A rolling bearing 9a and a seal member 10 are disposed in the center of the upper half 3a of the sealed container 3. In this embodiment, the first stator 2 is formed in the lower half 3b of the sealed container 3 as part of the sealed container 3, and a receiving surface 3c for receiving the power transmission shaft 7 is formed in the center of the lower half 3b by cutting out the hub 2b of the first stator 2, and a rolling bearing 9b is disposed between the lower end of the power transmission shaft 7 and the receiving surface 3c. However, the first stator 2 may be formed as a separate member from the sealed container 3 and fixed to the sealed container 3 later.

[0024] An annular second stator 11 having a hub 11b that is removably fixed to the hub 2b is disposed on the hub 2b of the first stator 2. The second stator 11 has a plurality of blades 11a extending radially outward from the outer periphery of the hub 11b, and the blades 11a are disposed between the blades 2a of the first stator 2 and the blades 5a of the pump 5. Meanwhile, a cylindrical portion 2c is formed on the hub 2b of the first stator 2 so as to rotatably surround the power transmission shaft 7. A step 2d is formed by reducing the diameter of the upper end of the cylindrical portion 2c radially inward, and an inward-facing cylindrical portion 11c formed on the upper inner periphery of the hub 11b of the second stator 11 is removably fitted into the stepped portion 2d. A plurality of outwardly directed teeth 2e projecting radially outward are formed on the outer peripheral surface of the cylindrical portion 2c that is continuous with the stepped portion 2d of the first stator 2, and a plurality of inwardly directed teeth 11d projecting radially inward from the lower surface of the cylindrical portion 11c of the hub 11b are removably fitted into these outwardly directed teeth 2e. By replacing or removing this second stator 11, it is possible to change the pump capacity of the heater, as will be described later.

[0025] In addition, the hub 5b of the pump 5 is spline-fitted to the power transmission shaft 7 so that it cannot rotate, and a rolling bearing 9c is arranged between the lower surface of the hub 5b of the pump 5 and the upper surface of the hub 11b of the second stator 11 to prevent the power transmission shaft 7 from descending.

[0026] Between the inner wall surface of the sealed container 3 and the pump 5, or in this embodiment, between the ceiling wall of the upper half 3a of the sealed container 3 and the back surface 5c of the pump 5, a heat exchanger 12 formed of a metal pipe and circulating a heat medium therein is disposed so as to spirally surround the power transmission shaft 7 in a plane perpendicular to the power transmission shaft 7, as shown in Fig. 3, and at least a portion of the heat exchanger 12 overlaps in the radial direction with the spiral flow path 6 of the oil 4. Also disposed on the top surface of the sealed container 3 are attachment portions for external piping 13 connected to an inlet 12a side and an outlet 12b side of the heat exchanger 12 and extending to the outside of the sealed container 3, and a circulation pump 15 interposed in the middle of the external piping 13 and circulating the heat medium in the heat exchanger 12 between the heat exchanger 12 and an external device 14.

[0027] A first gear member 16a that rotates integrally with the power transmission shaft 7 is fixed to a portion of the power transmission shaft 7 that protrudes from the sealed container 3, and a second gear member 16b that meshes with the first gear member 16a is fixed to an input shaft 15a of the circulation pump 15 that protrudes from the top surface of the circulation pump 15, as shown in Fig. 4, so that the circulation pump 15 is driven by rotation of the power transmission shaft 7 and the heat medium in the heat exchanger 12 is circulated between the heat exchanger 12 and the external device 14. Note that in this embodiment, the first and second gear members 16a, 16b are used as first and second mechanical power transmission members that transmit the rotation from the power transmission shaft 7 to the input shaft 15a of the circulation pump 15, but the first and second mechanical power transmission members are not limited to these and may also be, for example, a chain, a belt, or the like.

[0028] The external device 14 that circulates the heat medium may be a radiator or a heat engine that converts the thermal energy of the heat medium into mechanical energy such as rotational energy, or may be a heat accumulator that stores the thermal energy of the heat medium. Note that, for example, in a device that converts the rotational energy of the wind turbine 8 into electrical energy and stores the generated electrical energy, it is necessary to use an expensive storage battery, but a heat accumulator is cheaper than a storage battery and there is no need to worry about discharge, so storing the rotational energy in a heat accumulator as thermal energy can be said to be an effective energy storage means.

[0029] In this embodiment, the power transmission shaft 7 extending upward in the direction of gravity from the sealed container 3 is directly connected to the vertical shaft 8a of the vertical-axis wind turbine 8, but the direction in which the power transmission shaft 7 extends may be horizontal, and the shape of the wind turbine 8 is not particularly limited to the vertical axis type. Furthermore, a power source other than a wind turbine, such as a water turbine, may be used as long as it generates rotational power.

[0030] In the heater 1 of this embodiment configured as described above, the power transmission shaft 7 connected to the wind turbine 8 rotates by the power of the wind turbine 8, causing a spiral flow of oil 4 between the blades 5a of the pump 5 and the blades 2a, 11a of the first and second stators 2, 11, similar to that of a conventional fluid coupling. However, unlike conventional fluid couplings, the blades 2a, 11a of the first and second stators 2, 11 are fixed so as not to rotate in the sealed container 3 that is fixedly disposed in a building or the like. Therefore, the oil 4 is agitated between the blades 5a of the pump 5 and the blades 2a, 11a of the first and second stators 2, 11, generating heat due to fluid friction and causing the temperature of the oil 4 to rise. The heated oil 4 is cooled in a heat exchanger 12 disposed between the back surface 5c of the pump 5 and the ceiling wall of the upper half 3a of the sealed container 3, while the heat medium in the heat exchanger 12 is sent to an external device 14 by a circulation pump 15 driven by the power transmission shaft 7, enabling effective heat exchange with the external device 14.

[0031] When converting wind energy into mechanical power using a wind turbine, it is desirable to maximize the power coefficient Cp, which is the conversion efficiency. The power coefficient Cp of the wind turbine 8 changes parabolically in response to the tip speed ratio λ, which is the ratio (Vr / V) of the tip speed Vr of the wind turbine blades 8b to the wind speed V, and so there is a tip speed ratio λ somewhere along the change that maximizes the power coefficient Cp. Therefore, when connecting the heat generator 1 to the wind turbine 8, the pump capacity of the heat generator 1 can be adjusted to obtain the tip speed ratio λ that maximizes the power coefficient Cp of the wind turbine 8, thereby maximizing the wind turbine efficiency.

[0032] In conventional wind turbines that convert the rotational energy of the wind turbine 8 into electrical energy using a generator, when the wind speed V changes, the wind turbine rotation speed N changes, which in turn changes the tip speed ratio λ. Therefore, even if a tip speed ratio λ that maximizes the power coefficient Cp is obtained at a specific wind speed V, when the wind speed V changes, the tip speed ratio λ that maximizes the power coefficient Cp cannot be obtained. For this reason, it was necessary to deal with changes in wind speed V by using pitch control, adding a gearbox, or controlling the load on the generator. However, in the present invention, the rotational energy of the wind turbine 8 is converted into thermal energy using a heater 1 that uses a fluid coupling, so it is possible to obtain a tip speed ratio λ that always maximizes the power coefficient Cp, even when the wind speed V changes. The reason for this is explained below.

[0033] The output power E of a wind turbine can be expressed as follows, where Cp is the power coefficient, ρ is the air density, A is the pressure-receiving area of ​​the blade, and V is the wind speed. Here, if d is the diameter of the rotor, λ is the tip speed ratio, Vr is the tip speed of the wind turbine blade, and N is the rotation speed of the wind turbine, then V = Vr / λ and Vr = πdN / 60, so V can be expressed as V = πdN / 60λ, and therefore equation (1) can be transformed into E = Cp x (1 / 2) x ρ x A x (πdN / 60λ)3 (2). Furthermore, if the output torque of the wind turbine is T, the output torque T can be expressed as follows: T = 60E / 2πN (3) Therefore, from equations (2) and (3), the relationship between T and N can be expressed as follows: T = 60 × (Cp × (½) × ρ × A × (πdN / 60λ)⁻³ / 2πN = {(Cp × ρ × A × π2d³) / (4 × 602 × λ³)} × N² (4)

[0034] Equation (4) shows that if (Cp×ρ×A×π2d3) / (4×602×λ3) is constant, then the output torque T of the wind turbine 8 is proportional to the square of the rotation speed N of the wind turbine 8. Conversely, if the output torque T of the wind turbine 8 is made proportional to the square of the rotation speed N of the wind turbine, then (Cp×ρ×A×π2d3) / (4×602×λ3) becomes a proportionality constant and is fixed to a constant value. In other words, if T ∝ N2, then the power coefficient Cp and peripheral speed ratio λ, which change correspondingly, can be fixed to constant values ​​regardless of the wind speed V. However, as is well known, the input torque of a fluid coupling is proportional to the square of the rotation speed N. Therefore, by using a fluid coupling as the heater 1, the output torque T of the wind turbine 8 connected to the power transmission shaft 7 of the heater 1 can be made proportional to the square of the rotation speed N of the wind turbine 8. Therefore, by using a fluid coupling as the heater 1 and adjusting the pump capacity of the heater 1 to obtain a tip speed ratio λ at which the power coefficient Cp of the wind turbine 8 is maximized, it is possible to obtain a tip speed ratio λ at which the power coefficient Cp is always maximized even if the wind speed V changes.

[0035] When the heat generator 1 of this embodiment is applied to a wind turbine 8 with different characteristics, it is conceivable that the pump capacity of the heat generator 1 will not match the characteristics of that wind turbine, making it impossible to obtain the peripheral speed ratio λ that maximizes the power coefficient Cp of the wind turbine. However, in this embodiment, the second stator 11 having a hub 11b fixed to the sealed container 3 is removably disposed in the portion of the spiral flow path 6 downstream of the first stator 2, between the pump 5 and the first stator 2. Therefore, simply by replacing or removing the second stator 11, it is possible to easily change the pump capacity of the heat generator 1, making it possible to provide a heat generator 1 that is optimal for a variety of wind turbines.

[0036] Next, the operation of the embodiment of the present invention having the above configuration will be described.

[0037] In this embodiment, the heater 1 includes a sealed container 3 having a first stator 2 fixed therein so as not to rotate, oil 4 filled in the sealed container 3, a pump 5 rotatably disposed within the sealed container 3 opposite the first stator 2 and forming a spiral flow path 6 for the oil 4 between the pump 5 and the first stator 2, a power transmission shaft 7 that non-rotatably supports the pump 5 at one end 7a and connects its other end 7b, which protrudes from the sealed container 3, to a power source 8 for rotational power, and bearing members 9a-9c that rotatably support the power transmission shaft 7 on the sealed container 3. The heater 1 also includes a heat exchanger 12 disposed within the sealed container 3 and an external pipe 13 connected to the heat exchanger 12 and extending to the outside of the sealed container 3, so that the oil 4 as a heating element and a heat medium such as antifreeze can be easily separated within the heater 1. This allows the oil 4 as a heating element to always remain within the heater 1, making it possible to prevent deterioration of the oil 4 while making the entire device more compact. Moreover, the heat generated by the oil 4 is quickly released to the outside via the heat medium in the heat exchanger 12, so that efficient heat exchange can be achieved.

[0038] Furthermore, a second stator 11 having a hub 11b fixed to the sealed container 3 is disposed between the pump 5 and the first stator 2, in the portion of the spiral flow path 6 downstream of the first stator 2. Therefore, even when the power source 8 is changed, the characteristics of the heat generator 1 can be adapted to the characteristics of the changed power source 8 simply by replacing the second stator 11, and the heat generator 1 can always be operated at maximum efficiency according to the characteristics of the power source 8.

[0039] Furthermore, since the heat exchanger 12 is disposed between the pump 5 and the wall surface of the sealed container 3, the heat generated in the spiral flow path 6 can be efficiently transferred to the heat exchanger 12, thereby improving the heat exchange efficiency.

[0040] Furthermore, since the power transmission shaft 7 is arranged parallel to the direction of gravity and the heat exchanger 12 is arranged between the back surface of the pump 5 and the ceiling wall of the sealed container 3, heat convection can be effectively utilized and efficient heat exchange can be achieved.

[0041] Furthermore, at least a portion of the heat exchanger 12 is positioned so as to overlap with the spiral flow path 6 in the radial direction, so that the heat generated within the spiral flow path 6 can be efficiently transferred to the heat exchanger 12, thereby improving the heat exchange efficiency.

[0042] The system further includes a circulation pump 15 for circulating the heat medium in the heat exchanger 12 between the heat exchanger 12 and an external device 14 arranged outside the sealed container 3, a first mechanical power transmission member 16a fixed to the power transmission shaft 7 outside the sealed container 3, and a second mechanical power transmission member 16b fixed to the input shaft 15a of the circulation pump 15 outside the sealed container 3. The circulation pump 15 is driven by engaging the first mechanical power transmission member 16a and the second mechanical power transmission member 16b, so that the circulation pump 15 can be driven only by the power of the drive source 8 transmitted to the power transmission shaft 7 without requiring external power, thereby reducing power consumption and improving efficiency.

[0043] Furthermore, since the circulation pump 15 is disposed between the sealed container 3 and the second mechanical power transmission member 16b, the entire device can be made compact even though it is equipped with the circulation pump 15, and the external piping 13 from the heat exchanger 12 to the circulation pump 15 can also be shortened, thereby reducing the effects of heat dissipation.

[0044] Although the embodiments of the present invention have been described above, various design modifications can be made to the present invention without departing from the spirit and scope of the invention. For example, as mentioned above, the second stator 11 may not be used, and the direction in which the power transmission shaft 7 extends may be horizontal. Furthermore, the power source is not limited to a wind turbine, and various shapes of heat exchangers can be selected.

[0045] DESCRIPTION OF SYMBOLS 1... Heat exchanger built-in heater 2... First stator 3... Sealed container 4... Oil 5... Pump 5c... Back surface 6... Spiral flow path 7... Power transmission shaft 7a... One end 7b... Other end 8... Wind turbine as power source 9a to 9c... Rolling bearings as bearing members 11... Second stator 11b... Hub 12... Heat exchanger 13... External piping 14... External equipment 15... Circulation pump 15a... Input shaft 16a... First gear member as first mechanical power transmission member 16b... Second gear member as second mechanical power transmission member

Claims

1. A heater with built-in heat exchanger comprising: a sealed container having a first stator fixed therein so as not to rotate; oil filled in the sealed container; a pump rotatably disposed within the sealed container opposite the first stator and forming a spiral flow path for the oil between the first stator and a power transmission shaft which non-rotatably supports one end of the pump and has the other end protruding from the sealed container connected to a power source for rotational power; a bearing member which rotatably supports the power transmission shaft in the sealed container; a heat exchanger disposed within the sealed container; and an external piping connected to the heat exchanger and extending to the outside of the sealed container.

2. A heater with a built-in heat exchanger as described in claim 1, characterized in that a second stator having a hub fixed to the sealed container is disposed between the pump and the first stator, in the portion of the spiral flow path downstream of the first stator.

3. A heater with a built-in heat exchanger according to claim 1 or 2, characterized in that the heat exchanger is disposed between the pump and the wall surface of the sealed container.

4. A heater with a built-in heat exchanger as described in claim 1 or 2, characterized in that the power transmission shaft is arranged parallel to the direction of gravity, and the heat exchanger is arranged between the rear surface of the pump and the ceiling wall of the sealed container.

5. A heater with a built-in heat exchanger as described in claim 1 or 2, characterized in that at least a portion of the heat exchanger is positioned so as to overlap with the spiral flow path in the radial direction.

6. A heat exchanger-integrated heat generator as described in claim 1 or claim 2, further comprising a circulation pump for circulating the heat medium in the heat exchanger between an external device arranged outside the sealed container, a first mechanical power transmission member fixed to the power transmission shaft outside the sealed container, and a second mechanical power transmission member fixed to the input shaft of the circulation pump outside the sealed container, wherein the circulation pump is driven by engaging the first mechanical power transmission member with the second mechanical power transmission member.

7. A heat exchanger-integrated heater according to claim 6, characterized in that the circulation pump is disposed between the sealed container and the second mechanical power transmission member.

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