JPH0755372A - Heat exchange type fan - Google Patents

Abstract

PURPOSE:To enhance the heat exchanging performance by increasing heat exchanging area and eliminating the mixing of drying air with cooling air. CONSTITUTION:A drying air flow passage and a cooling air flow passage are formed by an annular partitioning member 8 on both sides of a heat exchanging fan 2 having corrugated blades 3 while a cylindrical wall surface 11 is provided on the inner peripheral rim of the partitioning member 8 and a cylindrical outer peripheral member 7 is provided on the outer peripheral rim of the blade 3. The cylindrical wall surface 11 is opposed to the outer peripheral member 7 through a gap while a cooling air casing 10, constituting a cooling air flow passage, is provided with an air pressure regulating port 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchange type blower provided with a heat exchange fan having a corrugated blade.

[0002]

2. Description of the Related Art A heat exchange type blower provided with a heat exchange fan having a corrugated blade has already been proposed and used in a clothes dryer (for example, Japanese Patent Laid-Open No. 61-989).
95). Such a conventional heat exchange type blower will be described with reference to FIG. 9 showing a side sectional view of a clothes dryer incorporating the same.

In FIG. 9, reference numeral 201 denotes a heat exchange type blower, which is provided with a heat exchange fan 202. The heat exchange fan 202 is composed of a thin plate bent in a wave shape, and a valley portion and a mountain portion are located from the center of rotation. It is a so-called double-blade fan having blades 203 formed so as to be positioned radially, and has a blower function and a heat exchange function.

Reference numeral 204 denotes an inner member for supporting the blade 203 at the center of rotation, and a boss 20 for fixing the blade to the rotating shaft 205.
Have six. A cylindrical outer peripheral member 207 supports the blade 203 together with the inner member 204 from the outer peripheral direction and has three concentric ribs 208. A partition member 209 separates the drying air casing 210 and the cooling air casing 211 from each other, and a concentric rib 213 is formed on the inner peripheral end portion 212.
Has three. Reference numeral 214 denotes a labyrinth portion provided with three sets of interlocking portions by fitting the ribs 208 and 213 in a non-contact manner so as to keep the labyrinth path longer and thereby provide a space between the drying air casing 210 and the cooling air casing 211. It is airtightly separated. 215 is a dryer outer frame, 216 is a drum 217 rotatably disposed in the dryer outer frame 215.
Is a front door for introducing an object to be dried into the drum 216, and 218 is a duct for introducing hot and humid air for drying, and a heater 219 is provided on the way. 220 is a duct for discarding the sucked cooling air, 221 is a flow of drying air, 222 is a flow of cooling air, 223 is a drain port for discharging dehumidified water to the outside of the machine, and 224 is a motor. Note that D1 indicates the outer diameter of the heat exchange fan 202, and D2 indicates the diameter of the blade 203.

The operation of the above configuration will be described. When the power is turned on to rotate the motor 224 and the heat exchange fan 202 is rotated by this rotational force, two different air flows are generated on both sides of the blade 203 of the heat exchange fan 202. That is, a flow 221 of drying air and a flow 222 of cooling air are generated. The flow 221 of the drying air enters the drum 216 after being heated by the heater 219, heats the clothes in the drum 216 to become hot and humid, and then the heat exchange fan 202.
Moving along one side of the blade 203 of the duct 2
After passing through 18, the flow again flows toward the heater 219.
On the other hand, the flow 222 of the cooling air is sucked from the outside of the machine, moves along the other surface of the blade 203 of the heat exchange fan 202, and is exhausted to the outside of the machine again through the duct 220. In this case, both the drying air and the cooling air flow next to each other with one thin plate sandwiched between the valleys on both sides of the blade 203 and the partitioning member 209. Blade 20 for low cooling air
3 and the partition member 209 transfer heat. For this reason, the drying air is cooled, and the moisture contained therein is condensed into water droplets and drained from the drain port 223.
The drying air is dehumidified. The dehumidified drying air passes through the ventilation passage formed by the heat exchange fan 202, the drying air casing 210, and the partition member 209, and then the duct 21.
8 through the heater section 219, where it is heated and returns to the drum 216 in a circulating flow. On the other hand, the cooling air is sucked from the outside of the machine and enters the heat exchange fan 202, where the drying air is cooled and then the exhaust duct 220.
Form a flow that is exhausted more outboard.

[0006]

In the heat exchange type blower, since air having different temperatures flows in contact with both surfaces of the blade of the heat exchange fan, it is necessary to separate these airflows in an airtight manner. In the past, a labyrinth portion 214 formed by engaging a plurality of concentric ribs 208 and 213 was provided.

However, since the labyrinth portion 214 occupies a part of the outer diameter D1 of the heat exchange fan 202, the diameter D2 of the blade 203 cannot be increased, and the heat exchange type blower can be increased in size. From the point of avoidance, the size of the outer diameter D1 of the heat exchange fan 202 is limited, and there is a problem in improving the heat exchange performance.

In the labyrinth portion 214, the drying air casing 210 and the cooling air casing 21 are also provided.
There is also a problem that it is difficult to airtightly separate 1 and 1, and the cooling air enters the drying air casing 210, which affects the high temperature state of the drying air and reduces the heat exchange capacity. .

According to the present invention, without increasing the size of the main body, the diameter of the blade in the heat exchange fan is increased to increase the heat exchange area, the heat exchange performance is high, and the drying air and the cooling air are combined. It is an object of the present invention to provide a heat exchange-type blower in which the drying air is maintained at a high temperature without the inclusion of air, and the heat exchange capacity does not decrease.

[0010]

In order to solve the above-mentioned problems, the present invention provides a drying air flow path and a cooling air flow by means of ring-shaped partition members on both sides of a heat exchange fan having a corrugated blade. The flow passages are formed separately, and the outer peripheral edge of the blade is provided with a cylindrical outer peripheral member, and the inner peripheral edge of the partition member is provided with a cylindrical wall surface facing the outer peripheral member with a gap, respectively, and the cooling is performed. An air pressure adjusting port is formed in the use air flow path.

It is effective that the air pressure adjusting port is provided at the position of the outer peripheral side wall or the rear side wall of the cooling air casing forming the cooling air flow passage, particularly the spiral chamber formed in the peripheral portion thereof.

Further, a ring-shaped groove is formed on either one of the cylindrical outer peripheral member provided on the outer peripheral edge of the blade or the inner peripheral edge of the partition member, and a cylinder inserted into the other groove in a non-contact state. It is more preferable to form a protrusion. Also in this case, the air pressure adjusting port can be provided on the outer peripheral side wall or the rear side wall of the spiral chamber of the cooling air casing as described above.

[0013]

In the heat exchange type blower constructed as described above, the pressures of the drying air flow passage and the cooling air flow passage are balanced by the air pressure adjusting port provided in the cooling air flow passage. The pressure difference does not occur between both flow paths, and both flow paths can be airtightly separated.

Further, between the heat exchange fan and the partition member, sufficient airtightness can be maintained only by holding the cylindrical wall surface of the cylindrical outer peripheral member so as to face the cylindrical outer peripheral member with a gap, so that the radius of the blade is increased. The heat exchange efficiency can be improved.

Further, between the heat exchange fan and the partition member, it is preferable that a cylindrical projection is loosely fitted and held in a ring-shaped groove so that both air passages are more airtightly separated.

Further, if the air pressure adjusting port is provided on the cooling air casing, especially on the outer peripheral side wall or the rear side wall of the swirling chamber, the air pressure can be adjusted accurately and the adjusting port can be easily formed.

[0017]

【Example】

(Embodiment 1) An embodiment of the technical means of the invention described in claims 1 and 2 will be described with reference to FIGS. 1, 2 and 3.

FIG. 1 is a side sectional view of a clothes dryer incorporating a heat exchange type blower, FIG. 2 is a rear view of the clothes dryer as seen from the direction A in FIG. FIG. 3 is a cross-sectional view of the heat exchange blower incorporated in the clothes dryer taken along the line XX shown in FIG. 2.

Reference numeral 1 denotes a heat exchange type blower, which is provided with a heat exchange fan 2. The heat exchange fan 2 is composed of a thin plate bent in a corrugated shape, and the troughs and peaks of the corrugations are from the center of rotation. A so-called double-blade fan having blades 3 formed so as to be radially positioned toward the outer periphery is configured. 4 is an inner member that supports the blade 3 at the center of rotation,
It has a boss 6 fixed to the rotating shaft 5. 7 is the blade 3
Is a cylindrical outer peripheral member that supports the inner member 4 from the outer peripheral direction.
Is fixed to the tip of the. Reference numeral 8 denotes a ring-shaped partitioning member that separates the drying air casing 9 and the cooling air casing 10. A cylindrical wall surface 11 faces the outer peripheral member 7 and rotates with the heat exchange fan 2 at the inner peripheral edge portion. It is fixed by forming voids so that friction does not occur. Reference numeral 12 denotes a cooling air casing 10 formed by the cylindrical wall surface 11 and the partition member 8.
The air pressure adjusting port 13 is provided in the swirl chamber formed in 1. The drying air discharge passage of the drying air casing 9 communicates with a duct 15 for guiding the drying air. 1
Reference numeral 6 is a cooling air intake port, and 17 is a cooling air discharge port, both of which are formed on a back plate 18 of the dryer body. Reference numeral 19 denotes a cooling air discharge passage of the cooling air casing 10, which is a duct 2 for discarding the cooling air passing through the cooling air discharge port 17.
It is connected to 0. Reference numeral 21 is an outer frame of the dryer, 22 is a drum rotatably arranged in the outer frame 21 of the dryer, 23 is a front door for putting an object to be dried in the drum 22, and 24 is a hot and humid drying air. Heater provided in the duct 15,
Reference numeral 25 is a motor, 26 is a flow of drying air, 27 is a flow of cooling air, and 28 is a drain port for discharging dehumidified water to the outside of the dryer. D3 is the outer diameter of the heat exchange fan 2, and D4 is the diameter of the blade 3. Further, as shown in FIG. 2, the drying air discharge passage 14 of the drying air casing 9 is installed so as not to overlap with the cooling air discharge passage 19 of the cooling air casing 10 in plan view.

To explain the operation of the above structure, when the power is turned on to rotate the motor 25 and the heat exchange fan 2 is rotated by the rotation of the rotating shaft 3, two different air flows are generated on both sides of the heat exchange fan 2. That is, the flow of drying air 2
6 and a cooling air flow 27 are generated. The flow 26 of the drying air enters the drum 21 after being heated by the heater 24, heats the clothes in the drum 21 and then enters the drying air casing 9, and is directed to one surface of the blade 3 of the heat exchange fan 2. And flows from the drying air discharge passage 14 through the duct 15 toward the heater 24 again.

On the other hand, the flow 27 of the cooling air is drawn in from the cooling air intake port 16, enters the cooling air casing 10, flows along the other surface of the blade 3 of the heat exchange fan 2, and is cooled. The air is discharged to the outside from the cooling air discharge port 17 through the air discharge passage 19 and the duct 20. Both the drying air and the cooling air flow next to each other with one thin plate sandwiched between the valleys on both sides of the blade 3 and the partition member 8. Heat is transferred to the cooling air having a low temperature through the blade 3 and the partition member 8. As a result, the drying air is cooled, the moisture contained therein is condensed into water droplets, drained from the drain port 28, and the drying air is dehumidified. The dehumidified drying air passes through the ventilation path formed by the heat exchange fan 2, the drying air casing 9 and the partition member 8, passes through the duct 15 and the heater 24, and is heated here to return to the drum 21. It becomes a circulating flow. On the other hand, the cooling air is sucked into the cooling air casing 10 from the outside of the machine, enters the heat exchange fan 2, cools the drying air there, and is discharged from the duct 20 to the outside of the machine.

During the above-mentioned operation, the heat exchange fan 2 rotates to generate a pressure distribution inside the drying air casing 9 and the cooling air casing 10. That is, the air pressure in the area near the drying air discharge passage 14 in the drying air casing 9 decreases, and at the same time, the air pressure in the spiral chamber 12 in the cooling air casing 10 increases, causing a pressure difference. Due to this pressure difference, the cooling air of the cooling air casing 10 enters the drying air casing 9 to reduce the high temperature and high humidity state of the drying air, and as a result, the heat exchange capacity itself is reduced. . However, since the swirl chamber 12 is provided with the air pressure adjusting port 13, the air pressure in the swirl chamber 12 in the cooling air casing 10 does not rise, and a pressure difference is less likely to occur. Therefore, the cooling air of the cooling air casing 10 does not enter the drying air casing 9, so that the high temperature and high humidity state of the drying air is maintained, and the deterioration of the heat exchange capacity can be prevented. Moreover, since there is no pressure difference between the drying air casing 9 and the cooling air casing 10 and they are airtightly separated, a labyrinth portion unlike the conventional case is not required.
The diameter D4 of the blade 3 is increased to increase the heat exchange area, and the outer diameter D3 of the heat exchange fan 2 is the same as the conventional outer diameter D1, that is, the heat exchange performance is improved without increasing the size of the heat exchange type blower. You can

(Embodiment 2) An embodiment of the technical means of the invention described in claim 3 will be described with reference to FIG.

FIG. 4 is a sectional view of the heat exchange type blower,
Reference numeral 29 is a blade composed of a corrugated thin plate, and valley portions are provided radially from the center of rotation. 30 is blade 2
9 is an inner member that supports the rotating shaft 31, and has a boss 33 that fixes the heat exchange fan 32 to the rotating shaft 31. Reference numeral 34 is a cylindrical outer peripheral member that supports the blade 29 together with the inner member 30 from the outer peripheral direction. The inner peripheral end 36 of the partition member 35 is provided with a cylindrical wall surface 37 opposed to the outer peripheral wall of the cylindrical outer peripheral member 34 of the blade 29 with a gap therebetween. An air pressure adjusting port 41 is provided on the outer peripheral side wall 40. D5 is the outer diameter of the heat exchange fan 32, and D6 is the diameter of the blade 29. Further, the drying air discharge passage 43 of the drying air casing 42 is arranged so as not to overlap with the cooling air discharge passage 44 of the cooling air casing 38 in a plan view.

In this case, since the air pressure adjusting port 41 is provided especially on the outer peripheral side wall 40 of the spiral chamber 39 of the cooling air cylinder 38, the air pressure adjusting port 41 can be easily formed.
The structure is simple, and the air pressure can be adjusted accurately.
In the same manner as in the above case, the diameter D6 of the blade 29 can be increased without increasing the size of the heat exchange blower, and the child can be improved in heat exchange performance.

(Embodiment 3) An embodiment of the technical means of the invention described in claim 4 will be described with reference to FIG.

FIG. 5 shows a cross-sectional view of the heat exchange type blower,
Reference numeral 45 is a blade composed of a corrugated thin plate, and valley portions are provided radially from the center of rotation. 46 is blade 4
It is an inner member that supports 5 on the rotating shaft 47, and has a boss 49 that fixes the heat exchange fan 48 to the rotating shaft 47. Reference numeral 50 denotes a cylindrical outer peripheral member that supports the blade 45 together with the inner member 46 from the outer peripheral direction. The inner peripheral end portion 52 of the partition member 51 is provided with a cylindrical wall surface 53 opposed to the outer peripheral wall of the cylindrical outer peripheral member 50 of the blade 45 with a gap therebetween, and the cylindrical wall surface 53 of the cooling air casing 54 is provided. An air pressure adjusting port 57 is provided on the rear side wall 56. D7 is the outer diameter of the heat exchange fan 48, and D8 is the diameter of the blade 45. Also,
The drying air discharge passage 58a of the drying air casing 58 is arranged so as not to overlap with the cooling air discharge passage 59 of the cooling air casing 54 in plan view.

In this case, since the air pressure adjusting port 57 is provided especially on the rear side wall 56 of the swirl chamber 55, the air pressure can be adjusted accurately with a simple structure without increasing the size of the heat exchange blower. The diameter D8 of the blade 45 can be increased, and the heat exchange performance can be improved. Moreover, since the cooling air is discharged from the air pressure adjusting port 57 toward the back side of the heat exchange type blower, in the clothes dryer incorporating the heat exchange type blower, the discharging process of the cooling air becomes easy.

(Embodiment 4) An embodiment of the technical means of the invention described in claims 5 and 6 will be described with reference to FIG.

FIG. 6 shows a cross-sectional view of a heat exchange type blower,
Reference numeral 60 denotes a blade composed of a corrugated thin plate, and valley portions are provided radially from the center of rotation. 61 is a blade 6
It is an inner member that supports 0 on the rotating shaft 62, and has a boss 64 for fixing the heat exchange fan 63 to the rotating shaft 62. 65
Is a cylindrical outer peripheral member that supports the blade 60 together with the inner member 61 from the outer peripheral direction, and 66 is a ring-shaped groove provided in the outer peripheral member 65. The partition member 67 has an inner peripheral end portion 68 provided with a cylindrical projecting portion 69 which is inserted into the ring-shaped groove 66 of the cylindrical outer peripheral member 65 of the blade 60 in a non-contact state. The swirl chamber 71 is provided with an air pressure adjusting port 72. D9 is the outer diameter of the heat exchange fan 63, and D10 is the diameter of the blade 60. Also,
The drying air discharge passage 74 of the drying air casing 73 is arranged so as not to overlap with the cooling air discharge passage 75 of the cooling air casing 70 in plan view.

During the above-described operation, the heat exchange fan 63 rotates to cause a pressure distribution in the drying air casing 73 and the cooling air casing 70, but the air pressure adjusting port 72 is provided. As in the first embodiment, the pressure in the cooling air casing 70 does not rise, and the separation of the drying air and the cooling air in the drying air casing 73 and the cooling air casing 70 is kept airtight. It Further, the cylindrical outer peripheral member 65 of the blade 60 is provided with a ring-shaped groove 66, and the inner peripheral end portion 68 of the partition member 67 has a cylindrical shape which is inserted into the ring-shaped groove 66 in a non-contact state. Providing the protruding portion 69 increases the ventilation resistance due to the meandering of the ventilation path 76 formed therein, and the separated state of the drying air and the cooling air becomes more hermetic. Therefore, according to this embodiment, with a simple structure, the separation of the drying air and the cooling air can be further enhanced, and the diameter D10 of the blade 60 can be increased, so that the heat exchange area is increased and the heat exchange type The heat exchange performance can be improved without increasing the size of the blower.

(Embodiment 5) An embodiment of the technical means of the invention described in claim 7 will be described with reference to FIG.

FIG. 7 shows a cross-sectional view of a heat exchange type blower,
Reference numeral 77 is a blade composed of a corrugated thin plate, and valley portions are provided radially from the center of rotation. 78 is blade 7
It is an inner member that supports 7 on the rotating shaft 79, and has a boss 81 that fixes the heat exchange fan 80 to the rotating shaft 79. Reference numeral 82 is a cylindrical outer peripheral member that supports the blade 77 together with the inner member 78 from the outer peripheral direction, and 83 is a ring-shaped groove provided in the outer peripheral member 82. The inner peripheral end portion 85 of the partition member 84 is provided with a cylindrical protruding portion 86 that is inserted into the ring-shaped groove 83 provided in the cylindrical outer peripheral member 82 of the blade 77 in a non-contact state, and the cooling air casing. An air pressure adjusting port 90 is provided on the outer peripheral side wall 89 of the spiral chamber 88 of 87. D1
1 is the outer diameter of the heat exchange fan 80, and D 12 is the diameter of the blade 77. Further, the drying air discharge passage 92 of the drying air casing 91 is arranged so as not to overlap with the cooling air discharge passage 93 of the cooling air casing 87 in plan view.

In this case, since the air pressure adjusting port 90 is provided on the outer peripheral side wall 89 of the spiral chamber 88, the fourth embodiment will be described.
In comparison with the above case, the diameter D12 of the blade 77 can be made large without increasing the size of the heat exchange type blower, and the heat exchange performance can be improved.

(Embodiment 6) An embodiment of the technical means of the present invention will be described with reference to FIG.

FIG. 8 is a sectional view of the heat exchange type blower,
Reference numeral 94 is a blade composed of a corrugated thin plate, and valley portions are provided radially from the center of rotation. 95 is blade 9
4 is an inner member that supports the rotating shaft 96, and has a boss 98 that fixes the heat exchange fan 97 to the rotating shaft 96. Reference numeral 99 is a cylindrical outer peripheral member that supports the blade 94 together with the inner member 95 from the outer peripheral direction, and 100 is a ring-shaped groove provided in the outer peripheral member 99. The inner peripheral end portion 102 of the partition member 101 is provided with a cylindrical projecting portion 103 which is inserted into the ring-shaped groove 100 provided in the cylindrical outer peripheral member 99 of the blade 94 in a non-contact state, and the cooling air casing. An air pressure adjusting port 107 is provided on a rear side wall 106 of the spiral chamber 105 of 104. D13 is the outer diameter of the heat exchange fan 97, D1
4 is the diameter of the blade 94. Further, the drying air discharge passage 109 of the drying air casing 108 is arranged so as not to overlap with the cooling air discharge passage 110 of the cooling air casing 104 in plan view. In this case,
Since the air pressure adjusting port 107 is provided on the rear side wall 106 of the spiral chamber 105, the diameter D14 of the blade 94 can be increased with a simple configuration without increasing the size of the heat exchange type blower.
The heat exchange performance can be improved. Moreover, since the cooling air is discharged from the air pressure adjusting port 107 toward the back side of the heat exchange type blower, in the clothes dryer incorporating the heat exchange type blower, the discharging process of the cooling air becomes easy.

[0037]

Since the present invention is constituted as described above, it has the following effects.

A heat exchange fan having a blade having a wave-shaped cross section in which a valley portion is radially provided from the center of rotation toward a cylindrical outer peripheral portion, and two types which are located in the outer peripheral direction of the blade and flow in the valley portions on both sides of the blade. A ring-shaped partition member for separating the air flow, a drying air channel on one side partitioned by this partition member, and a cooling air channel on the other side, wherein the partition member is the outer periphery of the blade. Since it has a cylindrical wall surface facing the cylindrical outer peripheral member provided in the air gap and an air pressure adjusting port is provided in the cooling air flow path, even if the labyrinth portion in the heat exchange fan is eliminated. Since both the flow passages can be airtightly separated and the diameter of the blade can be increased, the heat exchange area can be increased, and a heat exchange type blower with high heat exchange performance can be realized without increasing the size of the heat exchange type blower. It is those that can be.

Further, a heat exchange fan having a blade having a wave-shaped cross section in which the valley portion is radially provided from the center of rotation toward the cylindrical outer peripheral portion, and the blade is located in the outer peripheral direction of the blade and flows in the valley portions on both sides of the blade. A ring-shaped partition member for separating two types of air streams, a drying air flow channel on one side partitioned by the partition member, and a cooling air flow channel on the other side are provided, and the outer peripheral edge of the blade is provided. A ring-shaped groove is provided on either one of the provided cylindrical outer peripheral member or the inner peripheral edge of the partitioning member, and a cylindrical protrusion that is inserted into the groove in a non-contact state is provided on the other, and the cooling is performed. Since the air pressure adjusting port is provided in the use air flow path, the drying air and the cooling air are airtightly separated between the drying air flow path and the cooling air flow path, Labyrinth in heat exchange fan Since parts of small to be able to increase the blade diameter, the heat-exchange fan without upsizing, those that can achieve heat exchange blower having a high heat exchange performance.

Further, since the air pressure adjusting port is formed on the outer peripheral side wall or the rear side wall of the spiral chamber of the cooling air casing, the air pressure can be adjusted accurately and the structure is easy and the cooling air is discharged. Processing is also easy.

[Brief description of drawings]

FIG. 1 is a sectional view of a clothes dryer incorporating a heat exchange type blower according to a first embodiment of the present invention.

[Figure 2] Rear view of the clothes dryer with the back plate removed

FIG. 3 is a sectional view of the main part of the heat exchange type blower taken along line XX in FIG.

FIG. 4 is a sectional view of a main part of a heat exchange type blower according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts of a heat exchange-type blower in Embodiment 3 of the present invention.

FIG. 6 is a sectional view of a main part of a heat exchange type blower according to a fourth embodiment of the present invention.

FIG. 7 is a cross-sectional view of essential parts of a heat exchange-type blower according to a fifth embodiment of the present invention.

FIG. 8 is a cross-sectional view of essential parts of a heat exchange-type blower according to a sixth embodiment of the present invention.

FIG. 9 is a cross-sectional view of a clothes dryer incorporating a conventional heat exchange type blower.

[Explanation of symbols]

1 heat exchange type blower 2,32,48,63,80,97 heat exchange fan 3,29,45,60,77,94 blade 7,34,50,65,82,99 outer peripheral member 8,35,51, 67,84,101 Partition member 9,42,58,73,91,108 Air casing for drying 10,38,54,70,87,104 Air casing for cooling 11,37,53 Cylindrical wall surface 13,41,57 , 72, 90, 107 Air pressure adjusting port 39, 55, 88, 105 Vortex chamber 40, 89 Outer peripheral side wall 56, 106 Rear side wall 66, 83, 100 Groove groove 69, 86, 103 Projection part

Claims (8)

[Claims] 1. An outer peripheral edge of the blade is provided on an inner peripheral edge of a ring-shaped partitioning member formed by separately forming a drying air flow channel and a cooling air flow channel on both sides of a heat exchange fan having a corrugated blade. A heat exchange type blower in which a cylindrical wall surface facing the cylindrical outer peripheral member provided in the above is provided with a gap, and an air pressure adjusting port is formed in the cooling air flow path. 2. The heat exchange type blower according to claim 1, wherein the air pressure adjusting port is formed in a cooling air casing forming a cooling air flow path. 3. The heat exchange type blower according to claim 2, wherein the air pressure adjusting port is formed on the outer peripheral wall of the spiral chamber of the cooling air casing. 4. The heat exchange type blower according to claim 2, wherein the air pressure adjusting port is formed on the side wall of the back side of the spiral chamber of the cooling air casing. 5. An inner peripheral edge of a ring-shaped partitioning member which separates and forms a drying air flow path and a cooling air flow path on both sides of a heat exchange fan having a corrugated blade, or an outer peripheral edge of the blade. A heat exchange type in which a ring-shaped groove is provided on one of the two, and a cylindrical protrusion which is inserted into this groove in a non-contact state is provided on the other, and an air pressure adjusting port is formed in the cooling air passage. Blower. 6. The heat exchange type blower according to claim 5, wherein the air pressure adjusting port is formed in a cooling air casing forming a cooling air flow path. 7. The heat exchange type blower according to claim 5, wherein the air pressure adjusting port is formed on the outer peripheral wall of the spiral chamber of the cooling air casing. 8. The heat exchange type blower according to claim 5, wherein the air pressure adjusting port is formed on the side wall of the back side of the spiral chamber of the cooling air casing.