JP2018185117A - Cooling device and radiation observation unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device that can preferably cool an object to be cooled, and to provide a radiation observation unit including the cooling device.SOLUTION: In a cooling device, first and second cooling parts 51, 52 are constituted of Peltier elements that have similar internal resistances and similar cooling properties. A power supply 60 respectively applies a first voltage and a second voltage to the first cooling part 51 and the second cooling part 52. The second voltage is configured so as to become larger than the first voltage.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a cooling device and a radiation observation unit including the cooling device.

  Conventionally, an electronic cooling element (cooling device) in which two Peltier elements having different cooling capacities are cascade-connected (series connection) is known (for example, Patent Document 1).

Japanese Patent No. 4537332

Here, the cooling capacity of the cooling device in which two Peltier elements are overlapped is determined according to the current flowing through each Peltier element and the heat generation of each Peltier element itself. That is, this cooling capacity is
(1) Based on the current flowing through each Peltier element, the amount of heat transferred from the heat absorption surface side to the heat generation surface side;
(2) A calorific value based on the internal resistance of each Peltier element;
Is an important factor.

  For example, when the cooling device is configured by connecting two Peltier elements having different cooling capacities in series with the power source and superimposing the two Peltier elements, each Peltier element has a similar current. Flowing. On the other hand, the amount of heat generated in each Peltier element is proportional to the resistance value of the internal resistance of the corresponding Peltier element.

  Thus, when two Peltier elements are connected in series to the power supply, the ratio of the heat generation amount of the other Peltier element to the heat generation amount of one Peltier element depends on the internal resistance of each Peltier element and depends on the power supply. It does not depend on the applied voltage. That is, in the technique of Patent Document 1, the amount of heat generated in each Peltier element and the current flowing through each Peltier element cannot be determined independently (without being subordinated). As a result, in some cases, there is a problem that the object to be cooled cannot be quickly cooled.

  Therefore, an object of the present invention is to provide a cooling device that can cool an object to be cooled well, and a radiation observation unit including the cooling device.

  In order to solve the above problems, the invention of claim 1 is a cooling device for cooling an object to be cooled, wherein each of the cooling devices includes a Peltier element having a similar internal resistance and a similar cooling characteristic. 1 and a second cooling unit, and a power source capable of applying the first and second voltages to the first and second cooling units, respectively, the first cooling unit being a first parallel to each other The second cooling unit has a second heat absorbing surface and a second heat radiating surface parallel to each other, and the first and second cooling units have the first heat absorbing surface and the first heat radiating surface. The second heat absorbing surface is disposed so as to face the one heat radiating surface, and the first heat absorbing surface of the first cooling unit is disposed so as to face the object to be cooled, and the second voltage. Is set to be greater than the first voltage. The features.

  The invention according to claim 2 is the cooling device according to claim 1, wherein the first and second cooling sections are respectively the first and second heat absorbing surfaces, and the first and second heat radiating surfaces. It is formed so that an area may become the same.

  Moreover, invention of Claim 3 is a cooling device of Claim 1 or Claim 2, It is further provided with the thermal radiation part provided so as to oppose the said 2nd thermal radiation surface of a said 2nd cooling part. Features.

  According to a fourth aspect of the present invention, in the cooling device according to the third aspect, the heat radiating portion includes a first heat transfer portion facing the second heat radiating surface, and the first heat transfer portion interposed therebetween. (2) A heat dissipating plate provided on the opposite side of the cooling unit, one end side is attached to the first heat transfer unit, and the other end side is attached to the heat dissipating plate, and heat is generated between the first heat transfer unit and the heat dissipating plate. And a cooling fan that is provided between the first heat transfer unit and the heat radiating plate, and is set so that the direction from the first heat transfer unit toward the heat radiating plate is a wind direction. It is characterized by that.

  The invention according to claim 5 is the cooling device according to any one of claims 1 to 4, and is arranged between the object to be cooled and the first cooling unit, and the object to be cooled and the first It further has the 2nd heat transfer part which contacts each of a cooling part, It is characterized by the above-mentioned.

  The invention according to claim 6 is provided in the observation chamber, a cooling device that cools the object to be cooled in the observation chamber as a cooling target, a supply unit that supplies liquid to the inner space of the observation chamber, and the observation chamber. And disposed on the opposite side of the cooling device across the cooling surface, the heating device for vaporizing the liquid supplied from the supply unit in the inner space, and the cooling by the cooling device An irradiation device for irradiating light to at least an area of the inner space in which the liquid vapor is supersaturated, and each of the cooling devices has the same internal resistance and has the same cooling characteristics First and second cooling units each including a Peltier element having a power source capable of applying first and second voltages to the first and second cooling units, respectively. 1 cooling section The first heat absorbing surface and the first heat radiating surface are parallel to each other, and the second cooling part has the second heat absorbing surface and the second heat radiating surface parallel to each other. The cooling unit is disposed so that the two heat absorbing surfaces face the first heat radiating surface, and the first heat absorbing surface of the first cooling unit is disposed so as to face the object to be cooled. In addition, the second voltage is set to be larger than the first voltage.

  The invention according to claim 7 is the radiation observation unit according to claim 6, wherein the first and second cooling units are the first and second heat absorbing surfaces, and the first and second heat radiating surfaces, respectively. Are formed so as to have the same area.

  The invention according to claim 8 is the radiation observation unit according to claim 6 or 7, further comprising a heat dissipating part provided so as to face the second heat dissipating surface of the second cooling part. It is characterized by.

  The invention according to claim 9 is the radiation observation unit according to claim 8, wherein the heat radiating portion includes the first heat transfer portion facing the second heat radiating surface and the first heat transfer portion. A heat radiating plate provided on the opposite side of the second cooling unit, one end side is attached to the first heat transfer unit, and the other end side is attached to the heat radiating plate, and between the first heat transfer unit and the heat radiating plate. A heat pipe that moves heat, and a cooling fan that is provided between the first heat transfer unit and the heat radiating plate, and is set so that the direction from the first heat transfer unit toward the heat radiating plate is a wind direction. It is characterized by having.

  The invention according to claim 10 is the radiation observation unit according to any one of claims 6 to 9, wherein the radiation observation unit is disposed between the cooling target and the first cooling unit, and the cooling target and the first cooling unit. It further has the 2nd heat transfer part which contacts each of 1 cooling part, It is characterized by the above-mentioned.

  In the first to tenth aspects of the present invention, the first and second cooling sections having the same internal resistance and the same cooling characteristics are respectively provided with the first and second voltages (the second voltage). Is greater than the first voltage).

  Thereby, the electric current which flows into a 2nd cooling part becomes larger than the electric current which flows through a 1st cooling part, and the heat transport capacity of a 2nd cooling part is superior to the heat transport capacity of a 1st cooling part. Further, the heat generation amounts of the first and second cooling units due to the internal resistance are proportional to the squares of the first and second voltages, respectively, and the heat generation amount of the first cooling unit with respect to the second cooling unit is suppressed. can do.

  Therefore, by setting the optimal first and second voltages, the heat transferred from the object to be cooled via the first heat absorption surface and the heat caused by the internal resistance of the first cooling unit are first cooled. It can be efficiently transported from the part to the second cooling part. As a result, the object to be cooled can be quickly cooled.

  In particular, according to the second and seventh aspects of the present invention, Peltier elements having the same characteristics and the same shape can be used as the first and second cooling sections. That is, the same Peltier element can be adopted as the first and second cooling units. Therefore, the number of types of parts included in the cooling device can be reduced, and the manufacturing cost of the cooling device can be reduced.

  Particularly, according to the third and eighth aspects of the invention, heat can be favorably transferred from the second heat radiation surface of the second cooling unit to the outside of the second cooling unit. As a result, the object to be cooled can be further rapidly cooled.

  In particular, according to the invention described in claims 4 and 9, the heat transported to each of the first heat transfer section and the heat radiating plate can be favorably moved to the outside of the cooling device by the cooling fan. .

  In particular, according to the invention described in claim 5 and claim 10, the first cooling unit is spaced apart from the cooling target by providing the second heat transfer unit between the cooling target and the first cooling unit. be able to. Therefore, the freedom degree of arrangement | positioning of the cooling device with respect to cooling object can be improved.

It is a perspective view which shows an example of the whole structure of the radiation observation unit in embodiment of this invention. It is a front view which shows an example of the whole structure of the radiation observation unit in embodiment of this invention. It is a left view which shows an example of the whole structure of the radiation observation unit in embodiment of this invention. It is a block diagram which shows an example of a structure of a cooling device vicinity. It is a perspective view which shows an example of a structure of a cooling device vicinity. It is a right view which shows an example of a structure of a cooling device vicinity. It is a perspective view which shows an example of a structure of a cooling device vicinity. It is a right view which shows an example of a structure of a cooling device vicinity.

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

<1. Configuration of radiation observation unit>
FIGS. 1 to 3 are a perspective view, a front view, and a left side view, respectively, showing an example of the configuration of the radiation observation unit 1 according to the embodiment of the present invention. Here, the radiation observation unit 1 is a so-called diffusion cloud chamber, and is used for observing the trajectory of charged particles (for example, radiation). As shown in FIG. 1, the radiation observation unit 1 mainly includes an observation chamber 10, a supply unit 20, a heating device 30, an irradiation device 40, and a cooling device 50.

  For convenience of illustration, the supply unit 20 is omitted from FIG. In addition, in FIG. 1 and subsequent drawings, in order to facilitate understanding of each component described in the drawings, an XYZ orthogonal coordinate system in which the Z-axis direction is a vertical direction and the XY plane is a horizontal plane, as necessary. Is attached.

  As shown in FIG. 1, the observation chamber 10 mainly has a box part 11 and a bottom part 15. A passing trajectory of charged particles is formed in a space (hereinafter referred to as “inside space”) 10 a surrounded by the box portion 11 and the bottom portion 15.

  As shown in FIGS. 2 and 3, the box portion 11 includes a top plate 12 and a plurality of (four in this embodiment) side plates 13. Each top plate 12 and side plate 13 are formed of, for example, a transparent acrylic plate. Thereby, the inner space 10a of the observation room 10 can be observed from the outside.

  The bottom portion 15 is an element that supports the box portion 11 and is disposed below the box portion 11. As shown in FIG. 1, the bottom portion 15 mainly includes a base body 16 and a lid body 17. The base body 16 is formed of a flat plate, and a through hole 16 a is formed at the center of the base body 16. Moreover, the heat transfer part 18 (2nd heat transfer part) is arrange | positioned at the through-hole 16a. Further, the lid body 17 closes the upper portion of the through hole 16 a while being in contact with the heat transfer section 18. Here, as the lid body 17 and the heat transfer section 18, a material having high thermal conductivity is employed.

  The supply unit 20 supplies a liquid (for example, water or ethanol) to the inner space 10 a of the observation chamber 10. As shown in FIGS. 2 and 3, the supply unit 20 is attached to each side plate 13 so as to be near the top plate 12.

  Here, in the present embodiment, as the supply unit 20, a material having high water absorption and liquid absorption properties such as urethane sponge is employed. Then, after the liquid is sucked into the supply unit 20, the supply unit 20 exhibits the liquid supply function by being arranged in the inner space 10a.

  Note that the replenishment of the liquid to the supply unit 20 may be performed in a state where the top plate 12 is opened. Further, the supply unit 20 may be replenished with liquid via a through hole (not shown). In this case, it is not necessary to open the top 12.

  Each of the heating devices 30 (30a, 30b) is constituted by, for example, an electric heater. As shown in FIG. 1, each heating device 30 is provided in the observation chamber 10 and is disposed on the opposite side of the cooling device 50 with the lid 17 (the surface of the lid 17) of the observation chamber 10 interposed therebetween. . Thereby, when the heating apparatus 30 is operated, the liquid supplied from the supply unit 20 is vaporized in the inner space 10a.

  The irradiation device 40 is configured by, for example, LED (Light Emitting Diode) illumination. As shown in FIG. 1, the irradiation device 40 is provided outside the observation room 10 so as to face one of the side plates 13 (more specifically, the side plate 13 on the back side). It has been.

  Here, after the liquid supplied from the supply unit 20 is vaporized by the heating device 30, when the inner space 10 a of the observation chamber 10 is supercooled by the cooling device 50, the liquid vapor becomes supersaturated. The irradiation device 40 according to the present embodiment includes at least a part of the area 10b (see FIGS. 2 and 3) in which the liquid vapor is supersaturated in the inner space 10a cooled by the cooling device 50. All are irradiated with light. Thereby, the trajectory of the charged particles passing through the area 10b can be observed.

  The cooling device 50 rapidly cools the observation chamber 10 to be cooled. As shown in FIGS. 1 to 3, the cooling device 50 is disposed below the observation chamber 10. The detailed configuration of the cooling device 50 will be described later.

<2. Configuration of cooling device>
4 to 6 are a block diagram, a perspective view, and a right side view showing an example of the configuration in the vicinity of the cooling device 50, respectively. 7 and 8 are a perspective view and a right side view showing an example of the configuration in the vicinity of the cooling device 50 in a state where the cooling fan 75 is removed from the heat radiating section 70, respectively. As shown in FIGS. 4 to 8, the cooling device 50 mainly includes first and second cooling units 51 and 52, a power source 60, and a heat radiating unit 70.

  Each of the 1st and 2nd cooling parts 51 and 52 is an electrical cooling element, and is comprised by the Peltier element of the same characteristic and the same shape.

  That is, each cooling unit 51, 52 has the same internal resistance and the same cooling characteristics. Moreover, as shown in FIG. 4, the 1st cooling part 51 has the 1st heat absorption surface 51a and the 1st heat dissipation surface 51b which are mutually parallel. The second cooling unit 52 has a second heat absorption surface 52a and a second heat radiation surface 52b that are parallel to each other. Furthermore, each cooling part 51 and 52 is formed so that each area | region of 1st and 2nd heat absorption surface 51a, 52a and 1st and 2nd heat radiation surface 51b, 52b may become the same.

  The cooling units 51 and 52 are stacked so that the second heat absorbing surface 52a faces the first heat radiating surface 51b. More specifically, the cooling units 51 and 52 are stacked so that the first heat radiating surface 51b and the second heat absorbing surface 52a are parallel to each other and both surfaces are in contact with each other.

  Further, between the observation chamber 10 to be cooled (more specifically, the lid 17 included in the observation chamber 10) and the first cooling unit 51, the lid 17 and the first cooling unit 51 are respectively connected. The heat transfer part 18 which contacts is arrange | positioned. Thus, the lid 17 in the observation room 10 is cooled by the cooling device 50. Therefore, the lid 17 becomes a cooled object cooled by the cooling device 50, and the surface of the lid 17 functions as a cooling surface in the observation chamber 10.

  As shown in FIG. 4, the power source 60 is electrically connected to the first cooling unit 51 via the electric wires 61a and 61b and to the second cooling unit 52 via the electric wires 62a and 62b. Thereby, the power supply 60 can apply the first voltage to the first cooling unit 51 and the second voltage to the second cooling unit 52, respectively. Here, in the present embodiment, the second voltage is set to be larger than the first voltage.

Here, the cooling capacity of a device using a plurality of Peltier elements such as the cooling device 50 is determined according to the current flowing through each Peltier element and the heat generated by each Peltier element itself. That is, this cooling capacity is
(1) Based on the current flowing through each Peltier element, the amount of heat transferred from the heat absorption surface side to the heat generation surface side;
(2) A calorific value based on the internal resistance of each Peltier element;
Is an important factor.

  And in the cooling device 50 of this Embodiment, each of the 1st and 2nd cooling parts 51 and 52 has the same internal resistance and the same cooling characteristic. The first cooling unit 51 is applied with a first voltage, and the second cooling unit 52 is applied with a second voltage.

  Thereby, in the cooling device 50 of the present embodiment, the value of the current flowing through each of the first and second cooling parts 51 and 52 can be made different, and the heat transport of the first and second cooling parts 51 and 52 is made. Can make a difference in ability. At the same time, the amount of heat generated by the first cooling unit 51 relative to the second cooling unit 52 can be suppressed.

  Therefore, by setting the optimal first and second voltages, the heat moved from the observation chamber 10 via the first heat absorbing surface 51a and the heat caused by the internal resistance of the first cooling unit 51 are obtained. It can be efficiently transported from the first cooling part 51 to the second cooling part 52.

  As shown in FIG. 4, the heat radiating unit 70 is provided so as to face the second heat radiating surface 52 b of the second cooling unit 52. As shown in FIGS. 5 to 8, the heat radiating portion 70 mainly includes a heat transfer portion 71 (first heat transfer portion), a heat radiating plate 72, a plurality of heat pipes 74, and a cooling fan 75. ing.

  The heat transfer unit 71 is disposed so as to face (more specifically, contact) the second heat radiating surface 52 b of the second cooling unit 52. The heat transfer unit 71 moves the heat released from the second heat radiating surface 52 b of the second cooling unit 52 to each heat pipe 74. Here, a material having high thermal conductivity is adopted as the heat transfer section 71.

  The heat radiating plate 72 is constituted by a so-called heat sink, and dissipates heat from a plurality of plate materials. As shown in FIGS. 5 to 8, the heat radiating plate 72 is provided on the opposite side of the second cooling unit 52 with the heat transfer unit 71 interposed therebetween.

  The plurality of (two in the present embodiment) heat pipes 74 are heat transport elements, and move heat between the heat transfer section 71 and the heat radiating plate 72. As shown in FIGS. 6 and 8, one end 74 a side of each heat pipe 74 is attached to the heat transfer portion 71, and the other end 74 b side is attached to the heat radiating plate 72.

  As shown in FIGS. 5 and 7, the cooling fan 75 is provided between the heat transfer section 71 and the heat radiating plate 72. Further, the rotation direction of the cooling fan 75 is set so that the direction from the heat transfer section 71 toward the heat radiating plate 72 is the wind direction. Thereby, the heat transported to each of the heat transfer unit 71 and the heat radiating plate 72 is favorably moved to the outside of the cooling device 50 by the cooling fan 75.

<3. Advantages of cooling device in the present embodiment>
As described above, in the cooling device 50 according to the embodiment of the present invention, each of the first and second cooling units 51 and 52 is configured by a Peltier element having the same internal resistance and the same cooling characteristics. ing. In addition, the first voltage is applied to the first cooling unit 51 and the second voltage is applied to the second cooling unit 52 by the power source 60. Further, the second voltage is set to be larger than the first voltage.

  Thereby, the current flowing through the second cooling unit 52 is larger than the current flowing through the first cooling unit 51, and the heat transport capability of the second cooling unit 52 is superior to the heat transport capability of the first cooling unit 51. . Further, the heat generation amounts of the first and second cooling units 51 and 52 caused by the internal resistance are proportional to the squares of the first and second voltages, respectively, when fluctuations in the resistance value of the internal resistance are not considered. Thus, the amount of heat generated by the first cooling unit 51 relative to the second cooling unit 52 can be suppressed.

  Therefore, by setting the optimal first and second voltages, the heat transferred from the observation chamber 10 via the first heat absorption surface 51a of the first cooling unit 51 and the internal resistance of the first cooling unit 51 are set. The resulting heat can be efficiently transferred from the first cooling unit 51 to the second cooling unit 52. As a result, the object to be cooled can be quickly cooled (rapidly cooled).

  In the cooling device 50 according to the embodiment of the present invention, Peltier elements having the same characteristics and the same shape can be used as the first and second cooling units 51 and 52. That is, the same Peltier element can be employed as the first and second cooling parts 51 and 52. Therefore, the number of types of components included in the cooling device 50 can be reduced, and the manufacturing cost of the cooling device 50 can be reduced.

  Further, in the cooling device 50 according to the embodiment of the present invention, by using the heat radiating unit 70, heat is favorably transferred from the second heat radiating surface 52 b of the second cooling unit 52 to the outside of the second cooling unit 52. Can do. Therefore, it is possible to further quickly cool the observation room 10 to be cooled.

  Furthermore, in the cooling device 50 according to the embodiment of the present invention, the heat transfer unit 18 is provided between the lid 17 of the observation chamber 10 and the first cooling unit 51. Thereby, the 1st cooling part 51 can be spaced apart from the observation room 10 used as cooling object, and can be arrange | positioned. Therefore, the freedom degree of arrangement | positioning of the cooling device 50 with respect to cooling object can be improved.

<4. Modification>
Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made.

  (1) Although the heat transfer unit 18 is described as being in contact with each of the first cooling unit 51 and the lid body 17 in the present embodiment, the present invention is not limited to this. For example, the heat transfer unit 18 may be omitted from the cooling device 50. In other words, when the first cooling part 51 and the lid body 17 are thermally connected, the first heat absorbing surface 51a of the first cooling part 51 is disposed so as to face the lid body 17 to be cooled. It is enough.

  (2) In the present embodiment, each of the first and second cooling units 51 and 52 has been described as being composed of Peltier elements having the same characteristics and the same shape, but is not limited thereto. Not a thing.

For example, for the convenience of the Peltier device manufacturer, the internal resistance and cooling characteristics remain the same, and when the external shape of the Peltier device is slightly changed, the Peltier device before and after the change is mixed. Cooling device
(A) a cooling device formed only by the Peltier element before this change, and
(B) a cooling device formed only by the Peltier element after this change,
Each has the same function and performance.

  That is, if the internal resistance and the cooling characteristics of the cooling units 51 and 52 are the same, a part of the area of the first and second heat absorbing surfaces 51a and 52a and the first and second heat radiating surfaces 51b and 52b or All may be different.

  (3) Moreover, in this Embodiment, although the supply part 20 demonstrated as what was affixed on each side plate 13, it is not limited to this. It is sufficient that it is affixed to at least one of the side plates 13.

  (4) Furthermore, in the present embodiment, the description has been made assuming that a single power supply 60 is used, but the present invention is not limited to this. For example, a voltage may be applied to the corresponding first and second cooling units 51 and 52 from each of the plurality of power supplies.

DESCRIPTION OF SYMBOLS 1 Radiation observation unit 10 Observation room 10a Inner space 10b Area 17 Cover body (cooled body)
18, 71 Heat transfer section (second and first heat transfer section)
DESCRIPTION OF SYMBOLS 20 Supply part 30 Heating apparatus 40 Irradiation apparatus 50 Cooling apparatus 51,52 1st and 2nd cooling part 51a, 52a 1st and 2nd heat absorption surface 51b, 52b 1st and 2nd heat radiation surface 60 Power supply 70 Heat radiation part 72 Heat sink 74 Heat pipe 74a One end 74b The other end 75 Cooling fan

In order to solve the above problems, the invention of claim 1 is a cooling device for cooling an object to be cooled, wherein each of the cooling devices includes a Peltier element having a similar internal resistance and a similar cooling characteristic. 1 and a second cooling unit, and a power source capable of applying the first and second voltages to the first and second cooling units, respectively, the first cooling unit being a first parallel to each other The second cooling unit has a second heat absorbing surface and a second heat radiating surface parallel to each other, and the first and second cooling units have the first heat absorbing surface and the first heat radiating surface. The second heat absorbing surface is disposed so as to face the one heat radiating surface, and the first heat absorbing surface of the first cooling unit is disposed so as to face the object to be cooled, and the second voltage. but the Rukoto is set to be larger than the first voltage It, while providing a difference in the first and the heat transport capacity of the second cooling unit, characterized that you suppress the heat generation amount of the first cooling portion to said second cooling unit.

The invention according to claim 6 is provided in the observation chamber, a cooling device that cools the object to be cooled in the observation chamber as a cooling target, a supply unit that supplies liquid to the inner space of the observation chamber, and the observation chamber. And disposed on the opposite side of the cooling device across the cooling surface, the heating device for vaporizing the liquid supplied from the supply unit in the inner space, and the cooling by the cooling device An irradiation device for irradiating light to at least an area of the inner space in which the liquid vapor is supersaturated, and each of the cooling devices has the same internal resistance and has the same cooling characteristics First and second cooling units each including a Peltier element having a power source capable of applying first and second voltages to the first and second cooling units, respectively. 1 cooling section The first heat absorbing surface and the first heat radiating surface are parallel to each other, and the second cooling part has the second heat absorbing surface and the second heat radiating surface parallel to each other. The cooling unit is disposed so that the two heat absorbing surfaces face the first heat radiating surface, and the first heat absorbing surface of the first cooling unit is disposed so as to face the object to be cooled. together with the second voltage, wherein the set Rukoto to be greater than the first voltage, while providing a difference in the first and the heat transport capacity of the second cooling unit, the first to the second cooling section 1 It characterized that you suppress the heat generation amount of the cooling unit.

Claims (10)

A cooling device for cooling a cooling target,
(a) first and second cooling parts each having a similar internal resistance and composed of Peltier elements having similar cooling characteristics;
(b) a power source capable of applying first and second voltages to the first and second cooling units, respectively;
With
The first cooling unit has a first heat absorbing surface and a first heat radiating surface parallel to each other,
The second cooling part has a second heat absorption surface and a second heat dissipation surface parallel to each other,
The first and second cooling units are arranged such that the two heat absorption surfaces face the first heat dissipation surface,
The first heat absorption surface of the first cooling unit is disposed so as to face the object to be cooled,
The cooling device, wherein the second voltage is set to be larger than the first voltage. The cooling device according to claim 1, wherein
The cooling device according to claim 1, wherein the first and second cooling sections are formed so that the areas of the first and second heat absorbing surfaces and the first and second heat radiating surfaces are the same. The cooling device according to claim 1 or 2,
(c) a heat dissipating part provided to face the second heat dissipating surface of the second cooling part;
The cooling device further comprising: The cooling device according to claim 3, wherein
The heat dissipation part is
(c-1) a first heat transfer portion facing the second heat radiation surface;
(c-2) a heat radiating plate provided on the opposite side of the second cooling unit across the first heat transfer unit;
(c-3) One end side is attached to the first heat transfer unit, the other end side is attached to the heat radiating plate, and a heat pipe that moves heat between the first heat transfer unit and the heat radiating plate;
(c-4) a cooling fan that is provided between the first heat transfer section and the heat radiating plate, and is set so that a direction from the first heat transfer section toward the heat radiating plate is a wind direction;
A cooling device comprising: The cooling device according to any one of claims 1 to 4,
(d) a second heat transfer unit disposed between the cooling target and the first cooling unit and in contact with each of the cooling target and the first cooling unit;
The cooling device further comprising: (a) the observation room;
(b) a cooling device that cools the object to be cooled in the observation chamber as a cooling target;
(c) a supply unit for supplying liquid to the inner space of the observation chamber;
(d) a heating device that is provided in the observation chamber, is disposed on the opposite side of the cooling device with the cooling target interposed therebetween, and vaporizes the liquid supplied from the supply unit in the inner space;
(e) an irradiation device that irradiates light to at least an area where the vapor of the liquid is supersaturated in the inner space cooled by the cooling device;
With
The cooling device is
(a-1) first and second cooling units each configured by Peltier elements having similar internal resistance and similar cooling characteristics;
(a-2) a power source capable of applying first and second voltages to the first and second cooling units, respectively;
Have
The first cooling unit has a first heat absorbing surface and a first heat radiating surface parallel to each other,
The second cooling part has a second heat absorption surface and a second heat dissipation surface parallel to each other,
The first and second cooling units are arranged such that the two heat absorption surfaces face the first heat dissipation surface,
The first heat absorption surface of the first cooling unit is disposed so as to face the object to be cooled,
The radiation observation unit, wherein the second voltage is set to be larger than the first voltage. The radiation observation unit according to claim 6,
The first and second cooling sections are formed so that the areas of the first and second heat absorbing surfaces and the first and second heat radiating surfaces are the same. . The radiation observation unit according to claim 6 or 7,
(a-3) a heat dissipating part provided to face the second heat dissipating surface of the second cooling part;
A radiation observation unit further comprising: The radiation observation unit according to claim 8,
The heat dissipation part is
A first heat transfer section facing the second heat radiation surface;
A heat sink provided on the opposite side of the second cooling unit across the first heat transfer unit;
One end side is attached to the first heat transfer section, the other end side is attached to the heat radiating plate, and a heat pipe that moves heat between the first heat transfer section and the heat radiating plate,
A cooling fan that is provided between the first heat transfer section and the heat radiating plate, and is set so that a direction from the first heat transfer section toward the heat radiating plate is a wind direction;
A radiation observation unit comprising: The radiation observation unit according to any one of claims 6 to 9,
(a-4) a second heat transfer unit disposed between the cooling target and the first cooling unit and in contact with each of the cooling target and the first cooling unit;
A radiation observation unit further comprising:

Images