JP3331039B2 - Gas drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas drying apparatus using a Peltier effect element.

[0002]

2. Description of the Related Art A conventional refrigeration dryer generally requires a refrigerator to obtain a low temperature by means of a refrigerant. A refrigerator including a compressor, a condenser, an evaporator, and the like has a complicated structure, and has problems such as generation of electric noise accompanying vibration and noise, and an increase in power consumption. Therefore, a drying apparatus using electronic refrigeration utilizing the characteristics of the Peltier effect element has been proposed. The electronic refrigerating dryer generally includes a heat absorber on the heat absorbing surface of the Peltier effect element, a heat dissipating member on the heat dissipating surface, and guides the air to be dehumidified to the heat absorber to cool the air. It is formed to condense the water vapor and remove it as water. By the way, in the above-mentioned electronic refrigeration dryer, the dehumidifying ability is determined by how effectively the heat absorbed on the heat absorbing surface side of the Peltier effect element is radiated on the heat dissipation surface side.

FIG. 3 is a sectional view schematically showing an example of a conventional electronic refrigerating dryer. A heat transfer plate d extending vertically is provided inside a housing c having an intake port a at a lower portion and an exhaust port b at an upper portion, and a heat radiating surface f of the Peltier effect element e is provided on a lower surface of the heat transfer plate d. And joining a heat absorbing fin h to a heat absorbing surface g of the Peltier effect element e.
Is covered with a heat insulating material i, a radiation fin j is joined to an upper surface of the heat transfer plate d, and an exhaust fan k is provided at an exhaust port b of the housing c. In addition, m is a drain port provided below the heat absorbing fin h in order to remove water dripping from the heat absorbing fin h.

When the exhaust fan k is driven, the air to be dehumidified flows into the housing c from the intake port a provided below the housing c, and passes through the heat absorbing fin h and the heat radiating fin j. The air is cooled by touching the heat absorbing fins h cooled by the low temperature conducted from the heat absorbing surface g of the Peltier effect element e, and the water vapor contained in the air is condensed on the surface of the heat absorbing fins h and from the air. As a result, it is dehumidified. Further, the air that has been cooled and dehumidified by the heat absorbing fins h contacts the heat radiating fins j heated by the heat conducted from the heat radiating surface f of the Peltier effect element e via the heat transfer plate d to be heated to become dry air. It is discharged from the exhaust port b.

[0005]

However, in the above-mentioned electronic refrigeration dryer, the heat transfer plate d connecting the heat radiating surface f of the Peltier effect element e and the heat radiating fin j is located at a position deviated from the air flow path. Therefore, even if an attempt is made to use the heat radiation from the heat transfer plate d to heat the air after cooling and dehumidification, the heat radiation is not used very effectively, and the heat is directly radiated from the heat transfer plate d before reaching the heat radiation fin j. Radiating fins j
The amount of heat conducted to the radiating fins j decreases the efficiency of the heating action of the air after cooling and dehumidifying, and the radiating effect of the Peltier effect element e is not improved. In addition, the electronic refrigeration dryer is designed for dehumidifying air in an open space, and has a problem that an exhaust fan k for promoting the flow of air is required in the housing c.

The present invention has been made in view of the above-mentioned circumstances, and is directed to a gas drying apparatus capable of flowing a pressurized gas (air or various gases) through a closed flow passage and cooling / heating the Peltier effect element through the closed flow passage wall surface. The purpose is to provide.

[0007]

According to the present invention, there is provided a Peltier effect element, a heat absorber provided on a lower surface of the Peltier effect element, wherein the gas is cooled by the Peltier effect element,
A radiator provided on the upper surface of the Peltier effect element and configured to heat gas by the Peltier effect element, an air supply pipe for releasing gas from the gas supply source into the heat absorber, and passing the gas from the heat absorber through the radiator. An air supply pipe for supplying gas to a gas demand destination, and a heat exchanger for performing heat exchange of gas between the air supply pipe and the air supply pipe, wherein the heat absorbing body is directly connected to a lower surface of the Peltier effect element. Plate, a heat-absorbing cylinder provided with a through-hole open to the outside at an upper position and directly fixed to the lower surface of the heat-absorbing plate, and having an outer diameter adapted to the inner diameter of the heat-absorbing cylinder and opening at the lower end of the outer peripheral surface A spiral groove-shaped gas flow passage provided with: an inner cylinder inserted and fixed in the heat absorbing cylinder so that an upper end portion of the gas flow passage coincides with the through hole; and a gas filled in the inner cylinder. A heat absorbing medium in the form of a layer. A heat radiating plate directly joined to the upper surface of the Peltier effect device and having a gas flow passage formed therein so as to radiate heat from the D effect device, and a fin is fixed to the upper surface of the radiating plate and formed on the upper surface. A radiating fin plate, wherein the heat exchanger comprises: an outer cylinder having a gas inlet and a gas outlet formed therein; and an inner pipe penetrating the inside of the outer cylinder and having fins formed on the outer periphery thereof, Is connected to the through hole of the heat absorbing cylinder so as to introduce gas from a gas supply source to the gas flow passage of the inner cylinder via the outer cylinder of the heat exchanger, and the air supply pipe is provided with a heat absorbing medium of the inner cylinder. The gas is heated by being vertically connected to the gas flow passage of the radiator plate through the heat absorbing medium through the upper end opening located in the upper space and penetrating through the heat absorbing cylinder to be supplied to the gas demand destination. As well as air from outside the heat absorbing cylinder. By connecting a bypass branched from an intermediate position to a flow passage to an inner pipe of the heat exchanger, heat is exchanged and gas is supplied to a gas demand destination. A drain valve for discharging water separated in the cylinder to the outside is connected, and a fan for cooling the radiator and the air supply pipe is provided above the radiator.

[0008]

According to the present invention, the gas flowing in the gas flow passage is cooled through the gas flow passage wall surface of the gas flow passage, further released into the heat absorber and cooled, and the water vapor contained in the gas is cooled by the heat absorber. As a result of condensation and removal from the gas, dehumidification occurs. The water vapor condensed in the heat absorber is discharged to the outside via a drain valve provided below the heat absorber. Further, after the gas cooled and dehumidified by the heat absorber flows into the air supply pipe, it is divided into a part flowing through the air supply pipe and a part flowing through the bypass, and the gas flowing through the air supply pipe is guided to the radiator and heated by the radiator. Also, the part flowing to the bypass exchanges heat with the gas in the air supply pipe in the heat exchange part which comes into contact with the air supply pipe, thereby cooling and raising the temperature of the gas, and both become dry gas and sent to the gas demand destination. Is done. Therefore, the gas flowing into the air supply pipe is primarily cooled in the heat exchange section, and then is secondarily cooled by passing through the heat absorber, so that sufficient dehumidification is performed.

Therefore, according to the gas drying apparatus of the present invention,
The heat sink is joined directly to the heat absorbing surface of the Peltier effect element, and the heat sink is joined directly to the heat dissipation surface, so that low-temperature conduction to the heat absorption body and heat conduction to the heat dissipation body are performed efficiently, and Since the gas cooled in the heat absorber is guided to the gas flow passage in the radiator plate of the heat radiator, the gas flowing in the gas flow passage efficiently deprives the heat of the radiator plate and raises the temperature. In addition, the heat effect of the heat radiator to the gas can be made high, and the gas drying action can be made excellent. Also, since the gas cooled in the heat absorber is diverted in two directions and guided to the gas flow passage of the radiator and the heat exchange part of the bypass, the primary cooling air precooled in the heat exchange part of the bypass is used. Efficient dehumidification is performed by the secondary cooling in the heat absorber, and the gas that has been cooled and dehumidified in the heat absorber is subjected to heat conduction and heat exchange in the radiator and the bypass heat exchange unit, thereby heating the heat very efficiently. As a result, the gas drying action is made extremely excellent, and the dehumidifying effect as a whole can be significantly improved. Further, a part of the gas cooled in the heat absorber is guided to the heat exchange part of the bypass and the temperature is raised in the heat exchange part, which is effective when supplying a high-temperature gas to a gas demand destination.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 schematically show an embodiment of a gas drying apparatus according to the present invention. A Peltier effect element 1 having a heat absorbing surface 1a on the front and a heat dissipating surface 1b on the back is placed below the heat absorbing surface 1a. A heat-absorbing plate 2 provided on the heat-absorbing surface 1a of the Peltier effect element 1 and joined to the heat-absorbing surface 1a so as to be fitted to a part of the outer periphery of the Peltier effect element 1;
A cylindrical heat-absorbing cylinder 4 having a lower portion formed in a funnel shape and fixed downwardly and having a through hole 3 at a predetermined upper position; and an outer diameter adapted to the inner diameter of the heat-absorbing cylinder 4. The heat-absorbing cylinder 4 has a spiral groove-shaped gas flow path 5 having an upper end closed and an open lower end on the outer peripheral surface, and the upper end of the gas flow path 5 matches the through hole 3. A heat absorbing body 8 is formed by a cylindrical inner cylinder 6 inserted and fixed in the inside, and a heat absorbing medium 7 provided in a layer inside the inner cylinder 6.

The radiating surface 1b of the Peltier effect element 1 is joined to the radiating surface 1b in close contact with the radiating surface 1b.
A heat radiating plate 12 having a gas flow passage 11 formed in a meandering shape and being open to the outside and a heat radiating fin plate 13 fixed to the upper surface of the heat radiating plate 12 and having fins extending upward on the upper surface. The radiator 14 is formed.

A heat exchanger 15 is arranged on the upper side of the radiator 14. As shown in FIG. 2, the heat exchanger 15 is an outer cylinder 18 having a gas inlet 16 near one end of the outer periphery and a gas outlet 17 near the other end of a cylindrical shape having both end faces closed. And an inner tube 19 that penetrates the center of both end surfaces of the outer cylinder 18 and extends along the axis of the outer cylinder 18 and has a large number of fins on its outer periphery.

A plurality of spirals are formed in a space above the radiating fin plate 13 and extend from a gas supply source (not shown), and are connected to a gas inlet 16 of an outer cylinder 18 of the heat exchanger 15. Gas outlet 1 of outer cylinder 18 of heat exchanger 15
An air supply pipe 20 is provided to connect from 7 to the through hole 3 provided in the upper part of the heat absorbing cylinder 4.

Further, the air supply pipe 2 formed in a spiral shape.
A fan 21 is provided above the radiating fin plate 13 in order to cool the heat sink 0 and promote heat radiation of the radiator 14.

The heat absorbing medium 7 provided in the heat absorbing cylinder 4
, And penetrates the center of the heat absorbing medium 7 in the vertical direction, is bent in the radial direction in the space below the heat absorbing medium 7, penetrates the outer wall of the heat absorbing cylinder 4, and projects outside the heat absorbing cylinder 4. The other end 1 of the gas flow passage 11 extends upward and is connected to one end 9 of the gas flow passage 11 of the heat sink 12.
An air supply pipe 22 extending from 0 to a gas demand (not shown) is provided, and the air supply pipe 22 branches from just before a connection portion to the one end 9 of the gas flow passage 11 and is divided into the heat exchanger 15. A bypass is connected to one end of the pipe and connected from the other end of the inner pipe of the heat exchanger to a predetermined portion of the air supply pipe.

Reference numeral 24 denotes a drain valve provided at the lower end of the heat absorbing cylinder 4.

Next, the operation will be described. The gas is supplied from a gas supply source (not shown), and the air supply pipe 20 and the heat exchanger 1 are provided.
The gas flowing in the gas flow passage 5 in the heat absorbing cylinder 4 through the through-hole 3 through the outer cylinder 18 of the Peltier effect element 5 is transmitted from the heat absorbing surface 1 a of the Peltier effect element 1 to the heat absorbing cylinder 4 via the heat absorbing plate 2. Cooled through the wall of the gas flow passage 5 by the low temperature,
The water vapor is discharged to the inside and further cooled, and the water vapor contained in the gas is condensed in the heat absorbing cylinder 4. At this time, the dew is further promoted by the gas coming into contact with the heat absorbing medium 7 and the water vapor is removed from the gas, resulting in dehumidification. The water vapor condensed in the heat absorbing cylinder 4 is discharged outside through a drain valve 24 provided at the lower end of the heat absorbing cylinder 4. Also,
The gas that has been cooled and dehumidified by the heat absorber 8 flows into the air supply pipe 22 that is open to the upper space of the heat absorption medium 7,
Is introduced into the gas flow passage 11 of the radiator plate 12 except for a part flowing through the bypass 23, and flows from the radiator surface 1 b of the Peltier effect element 1 while flowing through the gas flow passage 11. Heated by the heat conducted to 12. On the other hand, a part of the gas flowing through the bypass 23 is
5 passes through the inner pipe 19, exchanges heat with the gas on the outer circumference of the inner pipe 19, cools and raises the temperature of the gas. And is sent to a gas demand destination (not shown).

According to the above, the heat absorbing body 8 is directly joined to the heat absorbing surface 1a of the Peltier effect element 1 and the heat releasing surface 1b
Since the heat radiator 14 is directly joined to the heat sink 8, the low-temperature conduction to the heat absorber 8 and the heat conduction to the heat radiator 14 are efficiently performed, and the gas cooled in the heat absorber 8 is dissipated by the heat radiator 1.
4 is guided to the gas flow passage 11 in the heat radiating plate 12, so that the gas flowing in the gas flow passage 11 efficiently removes the heat of the heat radiating plate 12 and rises in temperature. Dissipate heat. Therefore, the heating effect of the heat radiator 14 on the gas cooled and dehumidified by the heat absorber 8 can be made highly efficient, and the gas drying effect can be made excellent.

Further, as shown in the figure, a part of the gas which has been cooled and dehumidified in the heat absorber 8 is led to the inner pipe 19 of the heat exchanger 15 provided at the local part of the air supply pipe 20 by the bypass 23 branched from the air supply pipe 22. So that the inner tube 19
The gas flowing inside effectively deprives the heat of the gas flowing into the outer cylinder 18 of the heat exchanger 15 from the air supply pipe 20 and rises in temperature,
The pre-cooling of the gas supplied to the heat absorbing cylinder 4 through the outer cylinder 18 and the air supply pipe 20 is performed, so that the gas cooling function of the heat absorbing body 8 can be made more efficient. In addition, a part of the gas heated by the heat exchange when passing through the inner pipe 19 of the heat exchanger 15 flows into the air supply pipe 22 through the bypass 23, and reaches the gas demand destination via the air supply pipe 22. Since it is included in the gas to be sent, it is effective when supplying a high-temperature gas to a gas demand destination.

Further, as shown in FIG.
If the fan 21 is provided above the fan 3, the fan 21 cools the spiral portion of the air supply pipe 20 and promotes the heat radiation of the radiator 14, so that the dehumidifying effect as a whole can be further improved.

The present invention is not limited only to the above-described embodiment. The gas flow passage 5 provided in the inner cylinder 6 is not formed in a spiral groove shape, but is meandered vertically and continuously along the outer peripheral surface of the inner cylinder 6. The heat absorbing medium 7 may not be provided depending on the degree of dehumidification required, and the air supply pipe 22 may be provided without providing the gas flow passage 11 in the heat sink 12.
May be arranged in contact with the heat radiating plate 12, the bypass 23 may be connected to the outer cylinder of the heat exchanger 15, and the air supply pipe 20 may be connected to the inner pipe 19. Of course, various changes can be made without departing from the scope.

[0023]

As described above, according to the gas drying apparatus of the present invention, various excellent effects can be obtained as described below.

I) Since the heat absorbing member is directly joined to the heat absorbing surface of the Peltier effect element and the heat dissipating member is directly joined to the heat dissipating surface, low-temperature conduction to the heat absorbing member and heat conduction to the heat dissipating member are improved. Since the gas cooled in the heat absorber is guided to the gas flow passage in the radiator plate, the gas flowing in the gas flow passage efficiently deprives the heat of the radiator plate and raises the temperature. As a result, it is possible to make the heating effect of the radiator to the gas high and to make the gas drying effect excellent.

II) Since the gas cooled in the heat absorber is diverted in two directions and led to the gas flow passage of the radiator and the heat exchange part of the bypass, the primary cooling precooled in the heat exchange part of the bypass is used. The supply air is subjected to secondary cooling in the heat absorber to perform efficient dehumidification, and the gas cooled and dehumidified in the heat absorber is subjected to heat conduction and heat exchange in the radiator and the bypass heat exchange unit, thereby achieving extremely high dehumidification. Heating is performed efficiently, and as a result, the gas drying action is made extremely excellent, and the dehumidifying effect as a whole can be significantly improved.

III) Part of the gas cooled in the heat absorber is guided to the heat exchange section of the bypass and rises in the heat exchange section, which is effective when supplying a high-temperature gas to a gas demand destination.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing an embodiment of a gas drying device of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a cross-sectional view schematically illustrating an example of a conventional electronic refrigeration dryer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Peltier effect element 1a Heat absorbing surface 1b Heat radiating surface 2 Heat absorbing plate 3 Through hole 4 Heat absorbing tube 5 Gas flow passage 6 Inner tube 7 Heat absorbing medium 8 Heat absorber 11 Gas flow passage 12 Heat sink 13 Heat sink fin plate 14 Heat sink 15 Heat exchanger (Heat exchange section) 16 Gas inlet 17 Gas outlet 18 Outer cylinder 19 Inner pipe 20 Air supply pipe 21 Fan 22 Air supply pipe 23 Bypass 24 Drain valve

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-302917 (JP, A) Japanese Utility Model No. 5-67320 (JP, U) Japanese Utility Model Application No. 1-95232 (JP, U) Japanese Utility Model No. 7- 17327 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B01D 53/26

Claims (1)

(57) [Claims] 1. A Peltier effect element, a heat absorber provided on a lower surface of the Peltier effect element to cool a gas by the Peltier effect element, and a gas absorber provided on an upper surface of the Peltier effect element by the Peltier effect element A gas radiator configured to heat the gas, a gas supply pipe for releasing gas from the gas supply source into the heat absorber, an air supply pipe for supplying gas from the heat absorber to the gas demand destination via the heat radiator, and the gas supply pipe. And a heat exchanger for exchanging gas between the air supply pipe and the heat absorbing body, wherein the heat absorbing body is provided at an upper position with a heat absorbing plate directly joined to a lower surface of the Peltier effect element and a through hole opened to the outside. A heat-absorbing cylinder directly fixed to the lower surface of the heat-absorbing plate, and a spiral groove-shaped gas flow passage having an outer diameter adapted to the inner diameter of the heat-absorbing cylinder and having an opening at the lower end of the outer peripheral surface. The upper end of the gas flow passage is forward An inner cylinder inserted and fixed in the heat absorption cylinder so as to match the through-hole; and a layered heat absorbing medium filled in the inner cylinder, wherein the radiator radiates heat from the Peltier effect element. A radiator plate directly joined to the upper surface of the Peltier effect element and having a gas flow passage formed therein, and a radiator fin plate fixed to the upper surface of the radiator plate and having fins formed on the upper surface, The heat exchanger includes an outer tube having a gas inlet and a gas outlet formed therein, and an inner tube penetrating through the outer tube and having fins formed on the outer periphery thereof. Connected to the through hole of the heat absorbing cylinder so as to introduce gas into the gas flow passage of the inner cylinder through the outer cylinder of the exchanger, and the air supply pipe extends from an upper end opening located in a space above the heat absorbing medium in the inner cylinder. Penetrates the heat absorbing medium in the vertical direction and penetrates the heat absorbing cylinder to Is connected to the gas flow passage of the radiator plate to heat the gas to be supplied to the gas demand destination, and has a bypass branching from an intermediate position from the outside of the heat absorbing cylinder to the gas flow passage. It is configured to perform heat exchange by connecting to the inner pipe of the heat exchanger and to supply gas to a gas demand destination, and at the lower part of the heat absorbing cylinder, discharge moisture separated in the heat absorbing cylinder to the outside. A gas drying device, wherein a fan for cooling the radiator and the air supply pipe is provided above the radiator.