Heat exchanger built-in heater

Abstract

To provide a heater having a simple structure and converting rotation energy into heat energy.SOLUTION: A heat exchanger built-in heater 1 includes: a sealed container 3 having a first stator 2 non-rotatably fixed to the inside; an oil 4 filled in the sealed container 3; a pump 5 rotatably arranged confronting the first stator 2 in the sealed container 3, and forming a spiral flow channel 6 of the oil 4 with the first stator 2; a power transmission shaft 7 non-rotatably supporting the pump 5 at one end 7a side, and connecting the other end 7b projecting from the sealed container 3 to a power source 8 of rotational power; bearing members 9a-9c supporting the power transmission shaft 7 rotatably relative to the sealed container 3; a heat exchanger 12 arranged inside the sealed container 3; and an external piping 13 connected to the heat exchanger 12 and extending to the outside of the sealed container 3.SELECTED DRAWING: Figure 1

Description

[Technical field]

[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 connects the other end protruding from the sealed container to a power source that generates rotational power; and a bearing member that rotatably supports the power transmission shaft on the sealed container, wherein the pump is rotated by the rotational power of the power source and the fluid in the sealed container is stirred, thereby converting rotational energy into thermal energy. [Background technology]

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

[0003] [Patent Document 1] Jpn. Jpn. Published No. 58-49005 Summary of the Invention [Problem to be solved by the invention]

[0004] The device disclosed in the above-mentioned Patent Document 1 is configured such that while rotating a power transmission shaft 3 supporting a pump 5 at one end side by the rotational power of a power source, water as a fluid is injected from an inlet 1c of a sealed container, so that the water accelerated by the blades of the pump 5 collides with the blades 2a of the stator 2 in a spiral flow path, and the rotational energy of the pump 5 is converted into thermal energy by this collision to heat the water. The heated water flows out to the back side of the pump 5 in the sealed container through the gap between the stator 2 and the pump 5 by centrifugal force, and is discharged from an outlet 8, so that the rotational energy can be taken out as thermal energy to the outside. However, the seal structure for preventing the pressurized water in the sealed container from flowing out from the power transmission shaft 3 to the bearing part is complicated, which increases the number of parts and leads to increased costs, and also has a problem in 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 an object to provide a compact heater having a simple sealing structure, a reduced number of parts, and excellent thermal efficiency. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the present invention has a first feature comprising: a sealed container having a first stator fixed therein so as not to rotate; oil filled in the sealed container; a pump rotatably arranged in 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 that non-rotatably supports the pump at one end and connects the other end protruding from the sealed container to a power source of rotational power; a bearing member that rotatably supports the power transmission shaft in the sealed container; a heat exchanger arranged in the sealed container; and an 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] Furthermore, 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 disposed at a position overlapping with 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 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 and 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. Effect of the Invention

[0013] According to a first aspect of the present invention, a heater including a sealed container with a first stator fixed therein so as not to rotate, oil filled in the sealed container, a pump rotatably arranged in the sealed container facing 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 connecting the 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, is provided with a heat exchanger arranged in the sealed container, and an external pipe connected to the heat exchanger and extending to the outside of the sealed container, so that the oil as a heating element and the heat medium such as antifreeze can be easily separated in the heater. As a result, the oil as a heating element can be always kept in the heater, so that the entire device can be made compact and deterioration of the oil can be prevented. Moreover, the heat generated by the oil is quickly released to the outside through the heat medium in the heat exchanger, so that heat exchange can be efficiently performed.

[0014] According to a second feature of the present invention, a second stator having a hub fixed to the sealed container is disposed in the spiral flow path downstream of the first stator between the pump and the first stator. Therefore, even when the power source is changed, the characteristics of the heater can be adapted to the characteristics of the changed power source by simply replacing the second stator, so that the heater 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 heat generated in the spiral flow path can be efficiently transferred to the heat exchanger, thereby improving heat exchange efficiency.

[0016] According to a fourth aspect of the present invention, 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, 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 with 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 includes 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 a 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.Therefore, the circulation pump can be driven only by the power of the drive source transmitted to the power transmission shaft without requiring external power, thereby reducing power and improving efficiency.

[0019] Furthermore, according to a 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. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a schematic configuration of a heat exchanger-equipped heater according to an embodiment when applied to a vertical axis wind turbine. [Diagram 2] FIG. 2 is an enlarged view of part A in FIG. [Diagram 3] FIG. 3 is a plan view of only the heat exchanger of the embodiment, as viewed from the direction of arrows 3-3 in FIG. [Figure 4] FIG. 4 is a plan view of the mechanical power transmission member of the embodiment as viewed from the direction of arrow 4-4 in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0022] As shown in FIG. 1 and FIG. 2 which is an enlarged view of part A in FIG. 1, the heat exchanger-equipped heater 1 of this embodiment includes: an annular first stator 2 having a plurality of blades 2a arranged in the circumferential direction; a sealed container 3 inside which the first stator 2 is fixed so as not to rotate; oil 4 filled in the sealed container 3; an annular pump 5 having a plurality of blades 5a opposing the blades 2a of the first stator 2 and disposed rotatably within the sealed container 3, forming a spiral flow path 6 for the oil 4 between the first stator 2 and the pump 5; 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 sealed container 3 connected to a wind turbine 8 as a power source for rotational power; and bearing members 9a-9c which rotatably support the power transmission shaft 7 in the sealed 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 the 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 a 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, but 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 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 in the hub 2b of the first stator 2 so as to surround the power transmission shaft 7 in a relatively rotatable manner, and an inwardly facing tubular portion 11c formed on the inner periphery upper portion of the hub 11b of the second stator 11 is removably fitted into a step portion 2d formed by reducing the diameter of the upper end of the cylindrical portion 2c radially inward. A plurality of outwardly directed teeth 2e projecting radially outward are formed on the outer peripheral surface of the cylindrical portion 2c continuing from 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 tubular portion 11c of the hub 11b are removably fitted into the outwardly directed teeth 2e. By replacing or removing the second stator 11, it is possible to change the pump capacity of the heater, as described later.

[0025] In addition, the hub 5b of the pump 5 is splined to the power transmission shaft 7 so as to be unable to 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 the 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 tube 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 part of the heat exchanger 12 overlaps with the spiral flow path 6 of the oil 4 in the radial direction. Also, on the upper surface of the sealed container 3, there are disposed an attachment portion of an external pipe 13 connected to the inlet 12a side and the 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 pipe 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 upper surface of the circulation pump 15, as shown in Fig. 4, so that the circulation pump 15 is driven by the rotation of the power transmission shaft 7, and the heat medium in the heat exchanger 12 is circulated between the external device 14. Note that in the embodiment, the first and second gear members 16a and 16b are used as the 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 for example, a chain, a belt, etc. can also be used.

[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. 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 does not need to worry about discharging, 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 type 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, for example a water turbine, may be used as long as it generates rotational power.

[0030] In the heater 1 of the present embodiment thus configured, the power transmission shaft 7 connected to the wind turbine 8 rotates by the power of the wind turbine 8, and a spiral flow of the oil 4 occurs 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 normal fluid coupling. However, unlike a normal fluid coupling, the blades 2a, 11a of the first and second stators 2, 11 are fixed to the sealed container 3 fixedly arranged in a building or the like so as not to be rotatable, so that the oil 4 is stirred between the blades 5a of the pump 5 and the blades 2a, 11a of the first and second stators 2, 11, and heat is generated by fluid friction, causing the temperature of the oil 4 to rise. The oil 4 with the increased temperature is cooled by the heat exchanger 12 arranged 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 the external device 14 by the circulation pump 15 driven by the power transmission shaft 7, and can effectively exchange heat with the external device 14.

[0031] When wind energy is converted into mechanical power by 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 circumferential 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 circumferential speed ratio λ at which the power coefficient Cp is maximized midway through the change. Therefore, when the heat generator 1 is connected to the wind turbine 8, the efficiency of the wind turbine can be maximized by adjusting the pump capacity of the heat generator 1 to obtain the circumferential speed ratio λ at which the power coefficient Cp of the wind turbine 8 is maximized.

[0032] Incidentally, in a conventional wind turbine in which the rotational energy of the wind turbine 8 is converted into electrical energy by 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 the tip speed ratio λ that maximizes the power coefficient Cp is obtained at a specific wind speed V, the tip speed ratio λ that maximizes the power coefficient Cp cannot be obtained when the wind speed V changes. For this reason, it was necessary to deal with changes in the 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 by the heater 1 using a fluid coupling, so that the tip speed ratio λ that always maximizes the power coefficient Cp can be obtained even if the wind speed V changes. The reason for this is explained below.

[0033] The output power E of a wind turbine is given by the following equation, 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. E=Cp×(1 / 2)×ρ×A×V 3 ...(1) It can be expressed as: Here, d is the diameter of the rotor blade, 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. V=Vr / λ Vr=πdN / 60 Since, V=πdN / 60λ Therefore, equation (1) can be expressed as follows: E=Cp×(1 / 2)×ρ×A×(πdN / 60λ) 3 ...(2) Furthermore, if the output torque of the wind turbine is T, the output torque T is 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×(1 / 2)×ρ×A×(πdN / 60λ) 3 / 2πN = {(Cp × ρ × A × π 2 d 3 ) / (4×60 2 ×λ 3 )}×N 2 ...(4) It can be expressed as:

[0034] Equation (4) is (Cp×ρ×A×π 2 d 3 ) / (4×60 2 ×λ 3 ) is constant, the output torque T of the wind turbine 8 is proportional to the square of the rotation speed N of the wind turbine 8. However, 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×π 2 d 3 ) / (4×60 2 ×λ 3 ) is a proportional constant and is fixed at a constant value, that is, T ∝ N 2 If so, it also shows that the correspondingly changing power coefficient Cp and circumferential speed ratio λ 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, so by using a fluid coupling as the heat generator 1, the output torque T of the wind turbine 8 connected to the power transmission shaft 7 of the heat generator 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 heat generator 1 and adjusting the pump capacity of the heat generator 1 to obtain the circumferential speed ratio λ at which the power coefficient Cp of the wind turbine 8 is maximized, it is possible to obtain the circumferential 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 possible that the pump capacity of the heat generator 1 will not match the characteristics of the wind turbine, making it impossible to obtain the circumferential speed ratio λ that maximizes the power coefficient Cp of the wind turbine. However, in this embodiment, the second stator 11 having the 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, by simply 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 in which a first stator 2 is fixed so as not to rotate, oil 4 filled in the sealed container 3, a pump 5 rotatably arranged in the sealed container 3 facing 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 supports the pump 5 non-rotatably at one end 7a and connects the other end 7b protruding from the sealed container 3 to a power source 8 for rotational power, and bearing members 9a to 9c that rotatably support the power transmission shaft 7 in the sealed container 3. The heater 1 includes a heat exchanger 12 arranged in 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 in the heater 1. As a result, the oil 4 as a heating element can be always kept in the heater 1, and deterioration of the oil 4 can be prevented while making the entire device 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, so that the heat generator 1 can always be operated at maximum efficiency according to the characteristics of the power source 8.

[0039] In addition, 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] In addition, since the power transmission shaft 7 is arranged parallel to the direction of gravity and the heat exchanger 12 is arranged between the rear surface of the pump 5 and the ceiling wall of the sealed container 3, heat convection can be effectively utilized, enabling efficient heat exchange.

[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 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 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. This means 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 the need for external power, thereby reducing power 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 embodiment of the present invention has been described above, various design modifications can be made to the present invention without departing from the gist of the present invention. For example, as described above, the second stator 11 may not be used, and the direction in which the power transmission shaft 7 extends may be horizontal. In addition, the power source is not limited to a windmill, and various shapes of heat exchangers can be selected. [Explanation of symbols]

[0045] 1. Heat exchanger with built-in heater 2. First stator 3. Sealed container 4. Oil 5. Pump 5c...Back 6...Spiral flow path 7 Power transmission shaft 7a...One end 7b...Other end 8. Windmills as a power source 9a-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: A first gear member as a first mechanical power transmission member 16b... A second gear member as a second mechanical power transmission member

Claims

1. a sealed container having a first stator fixed therein so as not to rotate; Oil filled in the sealed container; a pump that is rotatably disposed in the sealed container facing the first stator and that forms a spiral flow path for the oil between the pump and the first stator; a power transmission shaft that supports the pump non-rotatably at one end and connects the other end protruding from the sealed container to a power source for generating rotational power; a bearing member that rotatably supports the power transmission shaft in the sealed container; A heat exchanger disposed within the sealed container; an external pipe connected to the heat exchanger and extending to the outside of the sealed container; A heater with a built-in heat exchanger, comprising:

2. The heat exchanger-integrated heater according to claim 1, A heater with an integrated heat exchanger, characterized 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.

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

4. The heat exchanger-integrated heater according to claim 1 or 2, A heater with a built-in heat exchanger, characterized 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.

5. The heat exchanger-integrated heater according to claim 1 or 2, A heater with a built-in heat exchanger, wherein at least a portion of the heat exchanger is disposed at a position overlapping with the spiral flow path in a radial direction.

6. The heat exchanger-integrated heater according to claim 1 or 2, 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, wherein the circulation pump is driven by engaging the first mechanical power transmission member with the second mechanical power transmission member.

7. The heat exchanger-integrated heater according to claim 6, 2. A heater with a built-in heat exchanger, wherein the circulation pump is disposed between the sealed container and the second mechanical power transmission member.

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