JPH0718943Y2 - Dehumidifying cooling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a dehumidifying cooling device for dehumidifying and cooling a box body such as a dry storage by an electronic cooling element utilizing the Peltier effect.

[Prior Art] General, precision parts such as electronic parts, precision equipment such as cameras, optical instruments, measuring instruments, etc., storage rooms for storing foods, chemicals, medical products, etc. Must be kept at humidity.

Conventionally, an adsorbent such as silica gel and a desiccant are often used to maintain the low humidity, but it is difficult to maintain the low humidity for a long time.

On the other hand, Japanese Patent Application No. 59-151672 (Japanese Utility Model Publication No. 61-66777) discloses a microfilm (hereinafter referred to as publication a) which describes an apparatus for dehumidifying and cooling the inside of a refrigerator using an electronic cooling element.

This device uses the Peltier effect of the electronic cooling element to absorb the heat of the heat absorbing part (heat absorbing fin) inside the refrigerator which is in contact with the heat absorbing surface of the electronic cooling element and the heat radiating portion outside the refrigerator which is in contact with the heat releasing surface of the electronic cooling element. Since the inside of the refrigerator is dehumidified and cooled by an electronic method due to the heat radiation effect of the (radiation fin), low humidity can be maintained for a long period of time, which is suitable for dehumidifying the above-mentioned storage cabinet and the like.

However, since the dew condensation water on the surface of the heat absorbing part due to the dehumidification cooling is discharged to the outside of the storage and accumulated in the evaporation tray, it is necessary to discharge this water before it overflows.

Therefore, in the microfilm, the lower part of the heat dissipation part is immersed in the dew condensation water of the evaporating dish, and the heat of the heat dissipating part is used to automatically evaporate the water of the evaporating dish, thus eliminating the need to dispose of this water. At the same time, it is described that the heat dissipation of the heat dissipation part is effectively performed to enhance the cooling efficiency of the inside of the refrigerator.

In addition, the microfilm of Japanese Utility Model Application No. 47-90006 (Japanese Utility Model Publication No. 49-48267) (hereinafter referred to as Publication b) is used in a defrosting water evaporation device such as a refrigerator that utilizes the heat radiation of the condenser. While immersing the lower part of the heat conducting plate such as an aluminum plate mounted on the back side in the defrosting water receiver (equivalent to the evaporating dish), attach the water absorbing member such as a water absorbing cloth or sponge that is in close contact with the back side of the heat conducting plate. It is described that the lower end portion is immersed in the receiver, and the defrosting water of the receiver is sucked up by the capillarity (capillary phenomenon) of the water absorbing member to promote its evaporation.

And, the water absorbing member, by the sandwiching plate and the fixing means of the screw,
The upper part is screwed and fixed to the upper part of the heat conducting plate in a sandwiched state.

[Problems to be Solved by the Invention] In the case of the device described in Publication a, since the heat absorbing effect inside the refrigerator and the heat radiating effect outside the refrigerator occur due to natural convection (heat convection), the heat exchange efficiency is low and the inside of the refrigerator is low. The dehumidifying and cooling cannot be performed efficiently and promptly, and the amount of dew condensation water accumulated in the evaporation dish is small accordingly, and the heat radiation efficiency of the heat radiating portion is reduced, and the dehumidifying and cooling capacity cannot be improved.

Also, since the lower part of the heat dissipation part is only immersed to evaporate the condensed water of the evaporation dish, the evaporation surface of the condensed water of the heat dissipation part is limited to a part (lower part) thereof, and the evaporation of the condensed water is promoted. The evaporation capacity cannot be increased.

Therefore, there is a problem that the evaporation capacity of dew condensation water and the dehumidification cooling capacity cannot be dramatically improved.

By the way, in order to improve the evaporation capacity of the dew condensation water, it is conceivable to attach the water absorbing member of the publication b to the heat radiating portion of the publication a. In this case, the water absorbing member is fixed to the heat radiating portion by screwing with the fixing means. Therefore, it is not easy to mount and remove the water absorbing member, and the water absorbing member cannot be easily replaced or washed when it is contaminated.

An object of the present invention is to dramatically improve the evaporation capacity of dew condensation water and the dehumidification cooling capacity, and to facilitate the handling in maintenance work and the like.

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the dehumidifying and cooling device of the present invention, the heat absorbing surface and the heat radiating surface are provided in the through holes of the outer wall of the box body, and inside and outside of the box body. The thermoelectric cooling element facing the heat sink, the heat absorbing fin in which a plurality of vertical fins with comb-shaped teeth are planted in the base located inside the box and in contact with the heat absorbing surface, and the heat radiation surface located outside the box. Radiating fins in which a plurality of vertical fins with comb-like cross-sections are planted on the base in contact with the heat sink, the heat absorbing surface and the inner cover that covers the heat absorbing fins, and the inner air intake holes formed on the upper surface of the inner cover. An inner auxiliary fan for intake provided near the inner intake hole in the inner cover, an inner exhaust hole formed in a lower portion of a side surface of the inner cover, an outer cover covering the heat radiating surface and the heat radiating fins, The outer suction formed on the bottom of the side of the outer cover Holes, outer exhaust holes formed on the upper surface of the outer cover, outer auxiliary fans for exhaust provided near the outer exhaust holes in the outer cover, and water that has condensed on the heat-absorbing fins and has fallen to the bottom of the inner cover. A drainage pipe for draining the water into the outer cover, a water tank formed at the bottom of the outer cover in which the water from the drainage pipe is stored and the lower part of the radiation fin is immersed, and detachably attached to each fin piece of the radiation fin. The lower part is dipped and a suction member such as a felt or fiber sheet having a ring-shaped belt shape that sucks the water in the water storage tank upward by capillarity is provided.

[Operation] In the case of the dehumidifying and cooling device of the present invention configured as described above,
Due to the intake action of the inner auxiliary fan, the inside air in the box is introduced into the inner cover through the inner intake holes on the upper surface of the inner cover, and the heat absorbing fins in the cover absorb and dehumidify and cool.

The dry, low-temperature air after the dehumidifying and cooling is discharged into the box body through the inner exhaust hole at the lower side surface of the inner cover.

Also, the outside air is sucked into the outer cover from the outer intake holes at the lower side surface of the outer cover due to the exhaust action of the outer auxiliary fan.
The radiating fins inside this cover come into contact with the outside air and radiate heat.

The air whose temperature has risen after heat dissipation is discharged to the outside from the outside air exhaust hole on the upper surface of the outer cover by the exhaust action.

Therefore, by the organic coupling between the inner and outer covers and the inner and outer auxiliary fans, the heat absorbing action inside the box (inside the cabinet) and the heat radiating action outside the box (outside the cabinet) are efficiently performed by forced convection. The heat exchange efficiency is improved, and the dehumidifying and cooling of the inside of the box is efficiently and quickly performed.

Further, since the lower part of the radiation fin is immersed in the water storage tank, the evaporation of condensed water accumulated in the water storage tank is promoted by the improvement of the heat exchange efficiency, the heat radiation efficiency of the radiation fin is further improved, and the dehumidifying cooling capacity is improved. Remarkably improved.

Furthermore, the lower part of the suction body detachably attached to each fin piece of the radiation fin is immersed in the condensed water of the water storage tank, and the condensed water is efficiently sucked up by the capillarity of the suction body. Since the fin pieces come into contact with each other and evaporate from the surface thereof, the evaporation capacity of the condensed water is significantly improved.

With the improvement of the evaporation capacity, the heat dissipation efficiency of the heat dissipation fins is further improved, and the evaporation capacity of the condensed water and the dehumidification cooling capacity are dramatically improved.

At this time, since the suction body is formed into a ring-shaped belt shape and is easily attached to each fin piece of the heat radiation fin,
The suction body can be easily attached to the radiating fins without being fixed by screwing or the like by the fixing means, and can be easily removed, so that the suction body can be easily replaced or cleaned when it is dirty.

In addition, the inside cover tends to have a positive pressure due to the inflow of air due to the intake action of the inside auxiliary fan, and the outside cover tends to have a negative pressure due to the discharge of air due to the exhaust action of the outside auxiliary fan. The water in the water tank formed at the bottom of the inside does not flow back into the inside cover.

[Embodiment] An embodiment will be described with reference to FIGS. 1 to 4.

In these drawings, 1 is a box such as a storage box, 2 is a through hole formed in the outer wall of the box 1, and 3 is a box 1 outside the through hole 2.
Mounted on the mounting plate 4, a through hole formed on the mounting plate 3,
An outer heat transfer plate 5 is mounted on the outer side of the mounting plate 3.

Reference numeral 6 denotes a plurality of electronic cooling elements including Peltier elements. The heat radiation surface of each element 6 faces the outside of the box body 1 and contacts the outer heat transfer plate 5, and each element 6 is a through hole of the box body 1. 2 are arranged. Reference numeral 7 denotes an inner heat transfer plate which is in contact with a heat absorption surface of each element 6 facing the inside of the box body 1.

Reference numeral 8 denotes an endothermic fin located inside the box body 1 and attached to the inner heat transfer plate 7, and a plurality of vertically extending fin pieces 10 are planted in the base 9 in the shape of teeth of a heat-insulating comb to widen the endothermic area. Is formed. Reference numeral 11 denotes a heat radiating fin located outside the box body 1 and mounted on the outer heat transfer plate 5, and a plurality of vertical fin pieces 13 are planted in a comb-like cross-section on the base 12 to widen the heat radiating area. Is formed.

An inner cover 14 is attached to the inner surface of the mounting plate 20 and covers the heat absorbing surface of each electronic cooling element 6 and the heat absorbing fin 8. Reference numerals 15 and 16 denote inner intake holes and inner exhaust holes formed in the upper surface and lower side surface of the inner cover 14, and 17 denotes an inner auxiliary fan for intake provided near the inner intake hole 15 in the inner cover 14. , The air inside the box 1 from the inside air intake hole 15 (air in the refrigerator)
Is sucked into the inside cover 14 so that the inside pressure of the inside cover 14 tends to be positive, and the air passing through the heat absorbing fins 8 is discharged from the inside exhaust hole 16.

Reference numeral 18 denotes an outer cover mounted on the outer surface of the mounting plate 3, and covers the heat radiation surface of each electronic cooling element 6 and the heat radiation fin 11. Numerals 19 and 20 are outer intake holes and outer exhaust holes formed on the lower surface of the side surface of the outer cover 18, upper exhaust holes, and 21 is an outer auxiliary fan for exhaust provided near the outer exhaust hole 20 in the outer cover 18. Yes, the inside of the outer cover 18 tends to have a negative pressure, and the outer intake hole
The outside air is taken in from 19 and the air passing through the heat radiation fin 11 is exhausted from the outside exhaust hole 20.

Reference numeral 22 denotes a power supply device having a DC power supply configuration for energizing and driving each electronic cooling element 6.

A drain pipe 23 has one end communicating with the bottom surface of the inner cover 14, penetrates through the mounting plate 3, and has the other end opening at the bottom of the outer cover 18. Reference numeral 24 denotes an inclined surface formed on the bottom surface of the inner cover 14, which drains water that has condensed on the heat absorbing fins 8 and has fallen.
Pour into one end of 23.

Reference numeral 25 denotes a water storage tank formed at the bottom of the outer cover 18, in which the drainage water from the drainage pipe 23 is stored and the lower portion of the radiating fin 11 is immersed.

Reference numeral 26 denotes a suction member, which has a porous material such as felt and fiber sheet, has a slit, has an action of sucking water upward by a capillary phenomenon, and has a ring-shaped belt shape. It is removably attached to 13 along its peripheral surface, and the lower part is immersed in a water tank 25.

Then, the temperature of the heat absorbing surface of each element 6 is lowered by the energization drive of each electronic cooling element 6 by the power supply device 22, and the temperature of the heat absorbing fins 8 is lowered via the inner heat transfer plate 7.

Further, the temperature of the heat radiation surface of each electronic cooling element 6 rises, and the temperature of the radiation fin 11 rises via the outer heat transfer plate 5.

At this time, due to the intake action of the inner auxiliary fan 17, the box body 1
The moisture-containing air in the inside is sucked from the inner suction hole 15, cooled by the heat absorbing action of the heat absorbing fins 8 to be dehumidified, and converted into dry low temperature air.

Then, the dried low temperature air is exhausted from the inner exhaust hole 16 into the box 1 outside the inner cover 14, and the inside of the box 1 is dehumidified and cooled.

Further, the water condensed on the heat absorbing fins 8 by the dehumidifying cooling drops to the inclined surface 24 of the inner cover 14, passes through the drain pipe 23, and collects in the water tank 25 of the outer cover 18.

On the other hand, due to the exhaust action of the outer auxiliary fan 21, the outer cover 18
The inside shows a negative pressure tendency, and the outside air is sucked into the outside cover 18 from the outside intake hole 19 to cool the heat radiation fin 11 in a high temperature state.

The air whose temperature has risen due to this cooling is exhausted to the outside from the outer exhaust holes 20.

The inner and outer auxiliary fans 17 and 21 are provided to increase the amount of air flowing through the inner and outer covers 14 and 18 to improve heat exchange efficiency. Due to the organic coupling between the covers 14 and 18 on which the 16, 20 are formed and the auxiliary fans 17 and 21, the heat absorbing action inside the box 1 and the heat radiating outside the box 1 are efficiently performed by forced convection. The exchange efficiency is improved, and the dehumidifying and cooling inside the box 1 is efficiently and quickly performed.

Further, since the lower part of the radiation fin 11 is immersed in the water tank 25, the heat energy of the radiation fin 11 promotes the evaporation of the water in the water tank 25.

At this time, the lower part of the siphoning body 26 mounted on the fin piece 13 of the radiation fin 11 is also immersed in the water storage tank 25, and the capillary phenomenon causes the water in the water storage tank 25 to be efficiently sucked up.

Since the suction body 26 is in contact with the fin piece 13, the suctioned water is in contact with the heat radiation fins 11 to increase the amount of heat radiation, further promoting evaporation of water in the water storage tank 25, and the heat radiation fins 11 The evaporation capacity is dramatically improved as compared with the case where only the lower part of the is immersed.

Therefore, the dew condensation water accumulated in the water storage tank 25 evaporates very efficiently and is automatically discharged.

Moreover, since the evaporation heat is taken from the radiation fins 11 by the evaporation of the condensed water, at the same time, the cooling of the radiation fins 11 is significantly promoted, and the radiation efficiency thereof is further improved and the heat exchange efficiency is further improved.

And by improving the heat exchange efficiency by forced convection, the water tank
As the amount of water in 25 increases, the heat dissipation efficiency of the heat dissipation fins 11 improves, and suitable circulation is provided, so that the dehumidifying and cooling capacity is dramatically improved.

Further, the ring-shaped suction body 26 is detachably attached to each fin piece 13 of the radiation fin 11 without being fixed by screws or the like, and since the attachment and detachment thereof are easy, the suction body 26 is covered with dust or dust. When it is contaminated due to adherence of bacterium, generation of microorganisms, moss, etc., and its sucking ability decreases,
Cleaning or replacement after removing the suction body 26 from the radiation fin 11 is extremely easy, and handling such as maintenance work is very easy.

By the way, in order to exhaust the air in the outer cover 18 by providing the inner auxiliary fan 17 in the vicinity of the inner intake hole 15 to inhale the air in the box body 1 and the outer auxiliary fan 21 in the vicinity of the outer exhaust hole 20. As a tendency, the inner cover 14 on the heat absorbing fin 8 side has a positive pressure and the outer cover 18 on the radiating fin 11 side has a negative pressure, so that the water in the water storage tank 25 does not flow back into the inner cover 14.

The present invention can be applied not only to the storage cabinet but also to a closed switchboard, a control device, and the like.

[Advantages of the Invention] Since the present invention is configured as described above, it has the effects described below.

By the organic coupling of the inner and outer covers 14 and 18 and the inner and outer auxiliary fans 17 and 21 in which the intake holes 15 and 19 and the exhaust holes 16 and 20 are formed, the inside of the box body 1 (inside the compartment) The heat absorption function and the heat dissipation function outside the box body 1 (outside the storage) can be efficiently performed by forced convection,
The heat exchange efficiency can be improved and the dehumidifying and cooling inside the box 1 can be efficiently and promptly performed.

Further, since the lower part of the radiation fin 11 is immersed in the water tank 25,
By improving the heat exchange efficiency, the evaporation of the dew condensation water accumulated in the water storage tank 25 can be promoted, the heat dissipation efficiency of the heat dissipation fins 11 can be further improved, and the dehumidifying and cooling capacity can be remarkably improved.

Further, the lower part of the suction body 26 detachably attached to each fin piece 13 of the heat radiation fin 11 is immersed in the dew condensation water of the water storage tank 25,
Due to the capillarity of the sucking body 26, the condensed water is efficiently sucked up and evaporated in the upper part thereof, so that the evaporation capacity of the condensed water can be remarkably improved.

The heat dissipation efficiency of the heat dissipation fins 11 is further improved with the improvement of the evaporation capacity, so that the evaporation capacity of dew condensation water and the dehumidification cooling capacity can be dramatically improved.

Furthermore, since the suction member 26 is formed in a ring-shaped belt shape and is detachably attached to each fin piece 13 of the heat radiation fin 11, without fixing by screwing or the like by fixing means,
The siphoning body 26 can be easily attached to the heat dissipation fins 11, and can be easily removed, so that the siphoning body 26 can be easily replaced or washed when it is dirty, and is extremely easy to handle for maintenance work or the like. Is.

Further, due to the intake of air from the inner auxiliary fan 17, the inside of the inner cover 14 tends to have a positive pressure, and the discharge of air from the outer auxiliary fan 21 causes the inside of the outer cover 18 to have a negative pressure. Therefore, the water in the water storage tank 25 formed at the bottom of the outer cover 18 does not flow back into the inner cover 14.

Therefore, it is possible to provide a dehumidifying / cooling device in which the evaporation capacity of dew condensation water and the dehumidifying / cooling capacity are remarkably improved, and further, the dehumidifying / cooling apparatus is extremely easy to handle in maintenance work and the like.

[Brief description of drawings]

1 to 4 show one embodiment of the present invention. FIG. 1 is a cut front view, FIG. 2 is a cut plan view, FIG. 3 is a cut right side view, and FIG. 4 is a perspective view of a sucking body. It is a figure. 1 ... Box, 2 ... Through hole, 6 ... Electronic cooling element, 8 ...
Endothermic fins, 9,12 …… Base, 10,13 …… Fin pieces, 11
…… Radiation fins, 14 …… Inner cover, 15 …… Inner intake hole, 16 …… Inner exhaust hole, 17 …… Inner auxiliary fan, 18 ……
Outer cover, 19 ... Outer air intake hole, 20 ... Outer air exhaust hole, 21
…… Outside auxiliary fan, 23 …… Drainage pipe, 25 …… Water tank, 26
…… Sucking body.

Claims (1)

[Scope of utility model registration request] 1. A thermoelectric cooler disposed in a through hole in an outer wall of a box body and having heat absorbing and radiating surfaces facing the inside and outside of the box, and a base located inside the box and in contact with the heat absorbing surface. A heat-absorbing fin having a plurality of vertical fins planted in a comb-like cross section, and a plurality of vertical fins having a comb-like cross section in the base located outside the box and in contact with the heat dissipation surface. A radiating fin in which a piece is planted, an inner cover that covers the heat absorbing surface and the heat absorbing fin, an inner air intake hole formed on an upper surface of the inner cover, and a portion of the inner cover near the inner air intake hole. An inner auxiliary fan for intake provided, an inner exhaust hole formed in a lower portion of a side surface of the inner cover, an outer cover that covers the heat radiation surface and the heat radiation fins, and a lower portion of a side surface of the outer cover. And the outer cover, Outer exhaust hole formed on the upper surface of the outer cover, an outer auxiliary fan for exhaust provided in the outer cover in the vicinity of the outer exhaust hole, and water that has condensed on the heat absorbing fins and has fallen to the bottom of the inner cover. A drain pipe for draining into the outer cover, a water tank formed in the bottom portion of the outer cover in which water from the drain pipe is stored and the lower portion of the heat radiation fin is immersed, and the water radiation fin is attached to and detached from each of the fin pieces. A dehumidifying and cooling device having a suction member such as a felt and a fiber sheet, which is freely attached and whose lower part is immersed and which sucks water in the water storage tank upward by capillarity.