JP2005344992A - Cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the efficiency of a device by efficiently transferring the heat of a Peltier effect element 44 to fins of both heat sinks. <P>SOLUTION: In this cooling device 40 wherein the plurality of Peltier effect elements 44 are arranged between a heat absorption-side heat exchanger (heat absorption heat sink 42) and a heat radiation-side heat exchanger (heat radiation heat sink 43), the heat absorption heat sink 42 and the heat radiation heat sink 43 are respectively divided into several pieces. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cooling device using a Peltier effect element, and more particularly to a cooling device having a configuration in which a plurality of Peltier effect elements are arranged between a heat absorption side heat exchanger and a heat radiation side heat exchanger.

  Conventionally, as this type of cooling device, Patent Document 1 describes a device in which two Peltier effect elements are arranged side by side between an endothermic heat sink (heat absorption side heat exchanger) and a heat radiation heat sink (heat radiation side heat exchanger). Has been. In this cooling device, by applying a voltage to the Peltier effect element, heat is absorbed from the first fluid flowing on the endothermic heat sink side, and the heat is released to the second fluid flowing on the side of the heat sink heat sink, thereby cooling the first fluid. can do.

In this type of cooling device, when a relatively large cooling capacity is required, the number of Peltier effect elements to be used increases. For example, FIG. 7 shows a cooling device (Peltier module) (100) using nine Peltier effect elements (101). In this example, nine Peltier effect elements (101) are arranged in three columns and three rows between a heat sink (102) and a heat sink (103).
JP 2002-76934 A

  However, when the number of Peltier effect elements (101) is increased in this way, the heat sink (102) and the heat sink (103) increase in size, and the heat sink (102, 103) plate (contact surface with the Peltier effect element (101)) ) Flatness decreases and warping increases. As a result, the contact state between the Peltier effect element (101) and the heat sink (102, 103) deteriorates, and the heat of the Peltier effect element (101) cannot be efficiently transferred to the fins of the heat sink (102, 103). Efficiency is reduced.

  The present invention has been made in view of such problems, and the object thereof is to provide a plurality of Peltier effect elements between an endothermic heat sink (heat absorption side heat exchanger) and a heat radiation heat sink (heat radiation side heat exchanger). In the cooling device in which the Peltier effect elements are arranged, the heat of the Peltier effect element can be efficiently transferred to the fins of both heat sinks, thereby improving the efficiency of the device.

  In the present invention, the heat absorption side heat exchanger (42) and the heat absorption side heat exchanger (42) are each divided into a plurality of pieces.

  Specifically, the first invention includes a plurality of Peltier effect elements (44), a heat absorption side heat exchanger (42) disposed on a heat absorption surface of the Peltier effect element (44), and the Peltier effect element (44 ) On the heat radiating surface of the heat-dissipating side, and the heat-absorbing side heat exchanger (42) is disposed in the first fluid passage (27) through which the first fluid flows, and the second fluid flows. It is premised on a cooling device in which a heat radiation side heat exchanger (43) is arranged in the second fluid passage (28).

  The cooling device is characterized in that the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are divided into a plurality of parts.

  In the first aspect of the invention, by applying a voltage to each Peltier effect element (44), each Peltier effect element (44) absorbs heat from the first fluid flowing through the first fluid passage (27) on its heat absorption surface. While absorbing heat through the side heat exchanger (42), the heat dissipation surface dissipates heat to the second fluid flowing through the second fluid passage (28) via the heat dissipation side heat exchanger (43). As a result, the first fluid is cooled and the second fluid is heated.

  In this invention, the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are divided into a plurality of parts. Therefore, even if the number of Peltier effect elements (44) used in the cooling device is large, one of the heat exchangers (42, 43) on both the heat absorption side and the heat radiation side is enlarged. Can be prevented. Therefore, the warpage of the contact surface with the Peltier effect element (44) in these heat exchangers does not increase, and the contact state between the Peltier effect element (44) and each heat exchanger (42, 43) is kept good. It becomes possible.

  In addition, if a large heat sink (42) and a heat radiating heat exchanger (43) are used without being divided, the fins of the heat exchanger (42, 43) generally fall from the upstream side to the downstream side. And the downstream fluid flow becomes laminar. Therefore, heat exchange between the Peltier effect element (44) and the fluid is performed by inefficient laminar flow transmission, and the heat transfer efficiency is lowered. However, in the present invention, the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are each divided and arranged at an interval, thereby making the downstream fluid flow turbulent and heat The exchange can be performed with efficient turbulent transmission.

  The second invention is the cooling device of the first invention, wherein a plurality of Peltier effect elements (44) are arranged vertically and horizontally, and the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are at least fluids. It is characterized by being divided for each row crossing the flow direction.

  Here, when a plurality of Peltier effect elements (44) are arranged vertically and horizontally, and each heat exchanger (42, 43) is not divided, the warpage is in the direction intersecting the fluid flow direction and the fluid flow direction. It becomes a two-dimensional warp in the direction along. On the other hand, in the second invention, even if the contact surface of each heat exchanger (42, 43) with the Peltier effect element (44) is warped, the warp is 1 in the direction intersecting the fluid flow direction. It becomes a dimensional warp. Therefore, since the warpage of the contact surface in each heat exchanger (42, 43) can be suppressed, the contact state between the Peltier effect element (44) and each heat exchanger (42, 43) can be kept good.

  A third invention is characterized in that, in the cooling device of the first invention, the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are divided for each Peltier effect element (44). Yes.

  In the third aspect of the invention, since each heat exchanger (42, 43) is divided for each Peltier effect element (44), the warpage of the contact surface in each heat exchanger (42, 43) is made extremely small. Thus, the contact state between the Peltier effect element (44) and the heat exchangers (42, 43) can be kept extremely good.

  According to the first aspect of the present invention, in the cooling device having a plurality of Peltier effect elements (44), the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are divided into a plurality of parts, thereby providing the Peltier effect. Even if the number of elements (44) is large, it is possible to prevent the heat exchangers (42, 43) on the heat absorption side and the heat dissipation side from becoming large, so that in each heat exchanger (42, 43) It is possible to prevent the warpage of the contact surface with the Peltier effect element (44) from increasing. Therefore, the contact state between the Peltier effect element (44) and each heat exchanger (42, 43) can be kept good, and the efficiency of the apparatus can be increased.

  Also, by dividing the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) and arranging them at intervals, the downstream fluid flow is turbulent and efficient heat exchange is achieved. Since it can be performed with good turbulent flow transmission, the efficiency of the apparatus can be increased in that respect as well.

  According to the second invention, in the configuration in which a plurality of Peltier effect elements (44) are arranged vertically and horizontally, the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are arranged at least in the fluid flow direction. Even if the contact surface with the Peltier effect element (44) in each heat exchanger (42, 43) is warped due to the division for each intersecting row, the warpage is in the direction intersecting the fluid flow direction. It becomes a one-dimensional warp, and the contact state between the Peltier effect element (44) and each heat exchanger (42, 43) can be kept good. Therefore, the efficiency of the apparatus can be increased.

  According to the third aspect of the invention, the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are divided for each Peltier effect element (44), so that each heat exchanger (42, 43) Since the warpage of the contact surface can be made extremely small, the contact state between the Peltier effect element (44) and each heat exchanger (42, 43) can be kept very good, and the efficiency of the device can be further increased. It becomes.

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

  In this embodiment, the cooling device of the present invention is applied to a sleep capsule.

  As shown in FIG. 1, the sleeping capsule (10) includes a capsule body (11) and a covering member (12) that covers the capsule body (11). A space (sleeping room (13)) where the user can take a nap is defined between the capsule body (11) and the covering member (12).

  The covering member (12) is formed in a hood shape and is formed so as to be folded toward the head side of the capsule body (11). The sleep capsule (10) includes a head air conditioning unit (20) and a foot air conditioning unit (30) as air conditioning means for air conditioning the sleep room (13), and the head air conditioning unit (20) Is provided with a cooling device (40) of the present invention (see FIG. 2).

  The capsule body (11) includes a floor pedestal (14), an air inflow / outflow box (15) provided at the upper front end of the floor pedestal (14), and both sides of the front portion of the upper surface of the floor pedestal (14). And an auxiliary side plate (16) provided. And the upper part of the said floor base (14) is formed as a bed (17) for a sleeper's sleep. In the present embodiment, the sleeping person's head side is the front side, and the sleeping person's foot side is the rear side.

  The head air conditioning unit (20) is connected to an air inflow / outflow box (15). As shown in FIG. 2, the head air conditioning unit (20) includes one sirocco fan (22A) and two Peltier modules (45) (cooling device (40)) in a rectangular parallelepiped casing (21). And two axial fans (22B). The casing (21) includes two cooling side suction ports (23), one cooling side air outlet (24), two heat radiation side suction ports (25), and two heat radiation side air outlets (26). And are formed.

  The cooling side suction port (23) communicates with the head side suction port (18) of the air inflow / outflow box (15), and the cooling side air outlet (24) is connected to the head side side blowing of the air outflow / inflow box (15). It communicates with the outlet (19). The head side air outlet (19) and the head side air inlet (18) are located close to each other, and the head side air inlet (18) is located directly below the head side air outlet (19). doing. As a result, an air flow that creates a short circuit is formed between the head-side outlet (19) and the head-side inlet (18), and air conditioning is mainly performed on the sleeping person's head.

  On the other hand, the heat radiation side suction port (25) and the heat radiation side air outlet (26) are not shown, but are configured to be opened to the indoor space where the sleep capsule (10) is installed and the indoor air flows. .

  The sirocco fan (22A) is disposed at the center of the casing (21), and each Peltier module (45) is disposed on both sides thereof. As shown in FIG. 3, the Peltier module (45) includes an endothermic heat sink (endothermic heat exchanger) (42) arranged on one side with a partition plate (41) in between, and a radiant heat sink arranged on the opposite side. (Radiation side heat exchanger) (43). The endothermic heat sink (42) is disposed in the first air passage (first fluid passage) (27) through which the endothermic air as the first fluid (air in the sleeping capsule (10)) flows, and the heat sink (43) ) Is disposed in the second air passage (second fluid passage) (28) through which the heat radiation side air (the indoor air in which the sleeping capsule (10) is installed) flows as the second fluid. Both air passages (27, 28) are partitioned in the casing (21) by the partition plate (41) of the Peltier module (45) and the partition plate (29) in the casing (21), and the air is separated from the heat sink (42). , 43) is passed from above to below.

  As shown in FIG. 4, which is a perspective view showing the Peltier module (45) with the partition plate removed, a Peltier effect element (44) is disposed between the heat sinks (42, 43). The heat absorbing heat sink (42) is disposed on the heat absorbing surface side of the Peltier effect element (44), and the heat radiating heat sink (43) is disposed on the heat radiating surface side of the Peltier effect element (44). The Peltier effect elements (44) are arranged in three columns and three rows vertically and horizontally with respect to the air flow direction. The endothermic heat sink (42) and the heat dissipation heat sink (43) are each divided into nine for each Peltier effect element (44). In the above configuration, the Peltier effect elements (44) are not necessarily arranged in a square shape with respect to the air flow direction, and may be arranged in a plurality of rows and a plurality of columns.

  Although a detailed description of the foot air conditioning unit (30) is omitted, the foot air outlet (31) and the foot air inlet (32) of the foot air conditioning unit (30) are provided on the bed (17). It is located on both sides of the rear end and opens upward. The foot portion side air outlet (31) and the foot portion side suction port (32) are located side by side in the vicinity. An air flow that creates a short circuit is formed between the foot side air outlet (31) and the foot side air inlet (32), and air conditioning is mainly performed on the foot side of the sleeping person.

  The head air conditioning unit (20) and the foot air conditioning unit (30) are based on the set values of the air temperature on the head side and the foot side, and the detected temperatures on the head side and the foot side by a temperature sensor (not shown). Operation control. Specifically, the set values of the air temperature on the head side and the foot side are set in advance so that the head side is set to an initial predetermined temperature, while the foot side is set to an initial predetermined temperature on the head side. A high initial predetermined temperature is set. That is, the initial predetermined temperature on the head side and the foot side is the temperature distribution of `` head cold foot heat '' in which the temperature is lowest in the sleeping room (13) in the sleeping person's head and gradually increases toward the foot. It is set to be.

  As shown in FIG. 5, the cooling device (40) includes Peltier effect elements (44) in three groups (G1 to G3) for each row intersecting the air flow direction in the air passages (27, 28). A controller (50) which is a control means is provided so as to control the applied voltage by grouping. Further, the cooling device (40) includes a thermocouple (51) as temperature difference detecting means for detecting a temperature difference between both surfaces of the Peltier effect element (44) for each row intersecting the fluid flow direction, and a Peltier effect element. (44) includes a power supply (52) for applying a voltage to each column. The controller (50) is configured to control the voltage applied to each Peltier effect element (44) based on the temperature difference for each column.

-Driving action-
Next, operation | movement of the sleep capsule (10) mentioned above is demonstrated.

  First, in the bed (17), a user who takes a nap or the like enters the sleeping room (13), and the covering member (12) folded on the head side is rotated to the foot side and unfolded to sleep. To do.

  Next, in the head air conditioning unit (20), the air in the sleep capsule (10) that has flowed into the air inflow / outflow box (15) from the head side suction port (18) by driving the sirocco fan (22A). Flows into the casing (21) from the cooling side suction port (23) in the casing (21) of the head air conditioning unit (20). After this air passes through the endothermic heat sink (42) of the Peltier module (45) and is cooled, it is cooled by the sirocco fan (22A) from the cooling outlet (24) of the casing (21) and the air inflow / outflow box. It passes through the head side outlet (19) of (15) and is blown out into the sleep capsule (10). Cold air blown out from the head side outlet (19) is immediately sucked into the air inflow / outlet box (15) from the head side inlet (18), and the head side outlet (19) and head side A short circuit region is formed between the suction port (18). Thereby, the air conditioning of the sleeping person's head side is performed.

  Further, in this head air conditioning unit (20), by driving the axial fan (22B), the air in the room in which the sleep capsule (10) is installed is transferred from the heat radiation side suction port (25) to the casing (21 ) And is passed through the heat sink (43). At that time, the heat deprived by the Peltier effect element (44) from the air in the sleep capsule (10) is released to the room air. And this indoor air is discharge | released indoors from the thermal radiation side blower outlet (26).

  On the other hand, on the foot side, warm air blown from the foot side air outlet (31) of the foot air conditioning unit (30) is immediately sucked into the foot side air inlet (32), and the foot side air outlet A short circuit region is formed between (31) and the foot side suction port (32). Thereby, the air conditioning of the sleeping person's foot side is performed.

  As described above, in this embodiment, by applying a voltage to each Peltier effect element (44) of the cooling device (40), each Peltier effect element (44) is made of the first fluid on its heat absorption surface. While absorbing heat from the air in a certain sleep capsule (10) through the heat absorption heat sink (42), it radiates heat to the room air as the second fluid through the heat dissipation heat sink (43) on the heat dissipation surface. As a result, the first fluid is cooled.

  By the way, the temperature difference between both surfaces of the Peltier effect element (44) changes along the flow direction of the fluid. On the other hand, the applied voltage value for operating the Peltier effect element (44) most efficiently depends on the temperature difference between the two surfaces. However, in this type of conventional cooling device, since the same voltage is applied to all Peltier effect elements (44), there is a Peltier effect element (44) with relatively low efficiency, and the efficiency of the entire apparatus is related. There was a problem.

  On the other hand, in this embodiment, the Peltier effect elements (44) arranged vertically and horizontally are grouped for each row intersecting the fluid flow direction, and the voltage is controlled for each of these groups (G1 to G3). The Specifically, as shown in step ST1 and step ST2 of the control flow of FIG. 6, the temperatures of both surfaces of the Peltier effect element (44) are provided by thermocouples (51) provided for each row intersecting the fluid flow direction. The difference is detected for each column based on the temperature (T1 to T6), and the applied voltage (V1 to V3) to each Peltier effect element (44) is controlled based on the temperature difference for each column. Therefore, while the temperature difference between both surfaces of each Peltier effect element (44) changes along the fluid flow direction, an optimum voltage can be applied to each Peltier effect element (44).

-Effect of the embodiment-
According to the present embodiment, in the cooling device (40) having a plurality of Peltier effect elements (44), the heat absorption heat sink (42) and the heat radiation heat sink (43) are divided into a plurality for each Peltier effect element (44). Even when the number of the Peltier effect elements (44) is large, it is possible to prevent one of the heat sinks (42, 43) on the heat absorption side and the heat dissipation side from increasing in size. When each heat sink (42, 43) is enlarged, the flatness of the contact surface with the Peltier effect element (44) in each heat sink (42, 43) decreases and warpage increases. Therefore, it is possible to prevent the warpage from becoming large. Therefore, the contact state between the Peltier effect element (44) and the heat sinks (42, 43) can be kept good, and the efficiency of the apparatus can be increased.

  If a large heat sink (42) and a heat sink (43) are used without dividing them, the fins of the heat sink (42, 43) are integrated from the upstream side to the downstream side, and the fluid on the downstream side The flow becomes laminar. Therefore, heat exchange between the Peltier effect element (44) and the fluid is performed by inefficient laminar flow transmission, and the heat transfer efficiency is lowered. However, in this embodiment, each of the heat sink heat sink (42) and the heat sink heat sink (43) is divided and spaced apart, so the downstream fluid flow becomes turbulent and heat exchange is efficient. In this respect, the efficiency of the apparatus can be increased.

  Furthermore, the Peltier effect elements (44) arranged vertically and horizontally are grouped for each row intersecting the fluid flow direction, and the voltage is controlled for each group (G1 to G3), thereby along the fluid flow direction. An optimum voltage can be applied to each Peltier effect element (44) according to the temperature difference between the two sides of the changing Peltier effect element (44), thereby increasing the efficiency of all Peltier effect elements (44). As a result, the efficiency of the entire apparatus can be increased.

  In addition, by dividing the heat sink heat sink (42) and the heat sink heat sink (43) for each Peltier effect element (44), the temperature on both sides of the Peltier effect element (44) for each row that intersects the fluid flow direction. Is stable (no heat transfer between different rows). Therefore, it is possible to accurately control the voltage applied to each Peltier effect element (44) based on the temperature difference for each column, and reliably prevent the presence of a Peltier effect element (44) with low efficiency. Thus, the efficiency of the entire apparatus can be more reliably increased.

<< Other Embodiments >>
The present invention may be configured as follows with respect to the above embodiment.

  For example, in the above embodiment, the heat sink heat sink (42) and the heat sink heat sink (43) are divided for each Peltier effect element (44), but for each row orthogonal to the air flow direction, You may form so that it may divide | segment into several irrespective of the flow direction of air.

  As described above, the present invention is useful for a cooling device having a configuration in which a plurality of Peltier effect elements are arranged between an endothermic heat sink (an endothermic heat exchanger) and a heat dissipating heat sink (a heat dissipating side heat exchanger).

It is a perspective view of the sleep capsule which concerns on embodiment. It is an internal structure figure of a head air-conditioning unit. It is a perspective view of a Peltier module. It is a perspective view of a Peltier module in the state where a partition plate was removed. It is a block diagram which shows the connection state of a Peltier module, a power supply, and a controller. It is a flowchart which shows control of a Peltier module. It is a disassembled perspective view of the conventional Peltier module.

Explanation of symbols

(10) Sleep capsule
(20) Head air conditioning unit
(27) First air passage (first fluid passage)
(28) Second air passage (second fluid passage)
(30) Foot air conditioning unit
(40) Cooling device
(42) Endothermic heat sink (endothermic heat exchanger)
(43) Heat radiation heat sink (heat radiation side heat exchanger)
(44) Peltier effect element
(45) Peltier module

Claims (3)

A plurality of Peltier effect elements (44), a heat absorption side heat exchanger (42) disposed on the heat absorption surface of the Peltier effect element (44), and a heat dissipation side disposed on the heat dissipation surface of the Peltier effect element (44) A heat exchanger (43),
The heat absorption side heat exchanger (42) is arranged in the first fluid passage (27) through which the first fluid flows, and the heat radiation side heat exchanger (43) is arranged in the second fluid passage (28) through which the second fluid flows. A cooling device,
The cooling device, wherein the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are divided into a plurality of parts. The cooling device according to claim 1, wherein
A plurality of Peltier effect elements (44) are arranged vertically and horizontally,
The cooling device, wherein the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are divided at least in rows intersecting the fluid flow direction in the fluid passage. The cooling device according to claim 1, wherein
The cooling device, wherein the heat absorption side heat exchanger (42) and the heat radiation side heat exchanger (43) are divided for each Peltier effect element (44).

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