JP6704486B1 - Hot air device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give a temperature gradient in a longitudinal direction of a blowout port to a warm air blown out from a slit-shaped blowout port, and to make the amount of the warm air blown out from the blowout port uniform in the longitudinal direction. Provide a warm air device. SOLUTION: A warm air device includes a nozzle having a slit-shaped outlet for blowing warm air, two air blowing units for respectively blowing gases having different temperatures, and gas blown from each of the air blowing units respectively flows in separately. It has a first inflow hole 23c and a second inflow hole 23d, and a mixing chamber 23 that mixes the gas flowing from the first and second inflow holes 23c and 23d and supplies the mixed gas to the nozzle. A plurality of first inflow holes 23c and second inflow holes 23d are formed along a direction substantially parallel to the longitudinal direction of the air outlet, and the opening area of the first inflow hole 23c is one end side in the direction. Is smaller than the other end side, and the sum of the opening area of the first inflow hole 23c and the opening area of the second inflow hole 23d at each location along the direction is substantially equal. [Selection diagram] Fig. 4

Description

TECHNICAL FIELD The present invention relates to a warm air device including a nozzle having a slit-shaped outlet for blowing warm air.

There is a drying device that is arranged on the downstream side of a coating device that applies a liquid to a strip and that dries the strip by blowing hot air to the strip (for example, Patent Documents 1 and 2). The drying device of Patent Document 1 includes a nozzle having a slit-shaped outlet that blows out hot air in a direction perpendicular to the strip.

When hot air is blown perpendicularly to the surface of the strip, the hot air wraps around to the back side at the end of the strip, so even if uniform hot air is blown out from the outlet, the end of the strip has a higher temperature. Tends to become.

In order to solve such a problem, the air outlet according to Patent Document 1 has a gentle arc shape from the central portion corresponding to the width direction of the strip to the end, and the opening width of the strip in the transport direction is the end portion. It is formed so that the central portion is longer than that of. According to the drying device of Patent Document 1, the amount of hot air in the central portion in the width direction of the strip can be increased as compared with the end portion, and the temperature difference generated in the width direction of the strip can be eliminated.

JP 2004-18409 A JP-A-5-124047

On the other hand, depending on the content of the treatment performed on the strip, a temperature gradient in the longitudinal direction of the air outlet is given to the hot air blown from the air outlet, and the amount of hot air blown from the air outlet is made uniform in the longitudinal direction. Is required.

The present invention has been made in view of such circumstances, and an object thereof is to impart a temperature gradient in the longitudinal direction of the blowout port to the warm air blown out from the slit-shaped blowout port, and blown out from the blowout port. It is an object of the present invention to provide a warm air device capable of making the amount of warm air to be uniform in the longitudinal direction.

A warm air device according to the present invention includes a nozzle having a slit-shaped outlet that blows out warm air, and in the warm air device that blows out warm air from the nozzle to an object, two air blowers for blowing gases of different temperatures, respectively. And a mixing chamber that mixes the gas flowing in from each inflow hole and supplies the mixed gas to the nozzles. The inflow hole into which the gas blown from the air flows in and the inflow hole into which the gas blown from the other air blower flows in are formed in a plurality respectively along a direction substantially parallel to the longitudinal direction of the air outlet. The opening area of one of the inflow holes is smaller on the one end side in the direction than on the other end side, and the opening area of the one inflow hole at each location along the direction and the other inflow hole The sum with the opening area is almost equal.

In the present invention, the gas blown from one of the air blowers flows into the mixing chamber through one inflow hole, and the gas blown from the other air blower flows into the mixing chamber through the other inflow hole. The temperature of the gas blown from each blower unit is different. Therefore, gases having different temperatures flow into the mixing chamber through the respective inflow holes.
A plurality of the one inflow hole and the other inflow hole are formed along a direction substantially parallel to the longitudinal direction of the outlet, and the opening area of the one inflow hole is one end side in the direction. Is smaller than the other end side, and the sum of the opening area of the one inflow hole and the opening area of the other inflow hole at each location along the direction is substantially equal. Therefore, the amount of gas mixed in the mixing chamber is uniform in the longitudinal direction of the air outlet. Further, since the opening area of the one inflow hole is smaller on the one end side in the direction than on the other end side, the temperature of the gas mixed in the mixing chamber has a temperature gradient in the longitudinal direction of the air outlet.
Therefore, the amount of gas supplied from the mixing chamber to the nozzle and blown out from the blowout port is uniform in the longitudinal direction of the blowout port. The warm air blown out from the air outlet has a temperature gradient in the longitudinal direction.
The mode of the temperature and the temperature gradient of the warm air blown out from the outlet is not particularly limited, and the hot air also includes hot hot air.

In the warm air device according to the present invention, the rate of change in the opening area of the plurality of inflow holes in the direction is constant.

In the present invention, since the rate of change of the opening area of the plurality of inflow holes in the longitudinal direction of the outlet is constant, the temperature of the gas mixed in the mixing chamber is a linear temperature in the longitudinal direction of the outlet. Has a gradient.

The warm air apparatus according to the present invention includes a regulation plate that partially closes the inflow hole.

In the present invention, the opening area of the inflow hole can be defined by partially blocking the inflow hole with the restriction plate. Therefore, it is easy to adjust the opening area of the inflow hole.

In the warm air device according to the present invention, the inflow hole is an elongated hole intersecting in the direction, the restriction plate has a linear ridge line extending over the plurality of elongated holes, and each elongated hole is partially closed. is doing.

In the present invention, the inflow hole is an elongated hole, and the regulating plate has a linear ridge line portion extending over each elongated hole and partially closing the elongated hole. Therefore, it is possible to make the rate of change of the opening area of the inflow hole in the longitudinal direction of the air outlet constant.

The warm air device according to the present invention includes a rectification unit that rectifies the gas blown from the blower unit and causes the gas to flow into the inflow hole.

In the present invention, the gas flowing into the inflow hole of the mixing chamber is rectified by the rectifying unit and flows in. Therefore, it is possible to improve the uniformity of the amount of warm air blown from the air outlet. Moreover, a desired temperature gradient can be accurately applied to the gas mixed in the mixing chamber.

In the warm air device according to the present invention, the rectification unit has a length in the direction longer than the outlet, a duct through which gas blown from the blower unit flows in the direction, and along the direction. A straightening hole formed in the duct, for delivering the gas flowing through the duct to the inflow hole, wherein the duct has a downstream side in the gas flowing direction in the direction, and an upstream side in the flowing direction. Narrow compared to the side.

In the present invention, the gas blown from the blower unit flows in the duct in the longitudinal direction of the air outlet. The gas flowing through the duct is straightened by the straightening holes formed along the longitudinal direction and flows into the inflow holes of the mixing chamber. The air volume of the gas flowing through the duct is smaller on the downstream side in the flow direction than on the upstream side, but the duct is formed narrower on the downstream side in the flow direction than on the upstream side. It is possible to suppress a decrease in the air volume of the gas flowing therethrough. Therefore, the amount of gas flowing into the mixing chamber from the inflow hole is approximately proportional to the opening area of the inflow hole.
Therefore, it is possible to improve the uniformity of the amount of warm air blown out from the air outlet. Moreover, a desired temperature gradient can be accurately applied to the gas mixed in the mixing chamber.

According to the present invention, a temperature gradient in the longitudinal direction of the blowout port is given to the warm air blown out from the slit-shaped blowout port, and the amount of the warm air blown out from the blowout port is made uniform in the longitudinal direction. be able to.

It is a front view of the warm air apparatus according to the first embodiment. It is a side view of a warm air apparatus. It is a perspective view of a warm air device. It is an exploded perspective view showing the important section of a temperature gradient providing part. FIG. 5 is a sectional view taken along line VV of FIG. 2. FIG. 6 is a sectional view taken along line VI-VI of FIG. 1. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. It is the IX-IX sectional view taken on the line of FIG. It is a front view of a mixing chamber front plate. It is a sectional side view of a nozzle. It is a conceptual diagram which shows the state of the gas which flowed into the 1st and 2nd duct from the 1st and 2nd ventilation part. It is a conceptual diagram which shows the air volume of the gas which flows into a mixing chamber from a 1st and 2nd guide chamber. It is a conceptual diagram which shows the air volume of the gas which flows into a mixing chamber from the 1st and 2nd ventilation part via a 1st and 2nd guide chamber, and the mixing state of the gas which flowed into the mixing chamber. It is a graph which shows the temperature measurement result of the gas blown out from a warm air apparatus. It is a graph which shows the temperature measurement result of the gas blown out from the warm air apparatus which set the temperature of the gas blown from the 1st ventilation part to the high temperature compared with the temperature of the gas blown from the 2nd ventilation part. FIG. 6 is an exploded perspective view of a warm air gradient imparting unit according to the second embodiment.

Hereinafter, the present invention will be described in detail with reference to the drawings showing an embodiment thereof.
(Embodiment 1)
1 is a front view of the warm air apparatus according to the first embodiment, FIG. 2 is a side view of the warm air apparatus, and FIG. 3 is a perspective view of the warm air apparatus. The warm air apparatus according to the first embodiment is an apparatus that blows warm air onto the sheet-shaped strip A to dry the strip A or heat-treat the strip A. The warm air device includes a nozzle 1 having a slit-shaped outlet 1a that blows out warm air, a temperature gradient applying unit 2 that supplies a gas having a temperature gradient in the longitudinal direction of the outlet 1a to the nozzle 1, and the temperature. A first air blower 3 and a second air blower 4 are provided to blow air of different temperatures to the gradient imparting unit 2.

The band-shaped body A is, for example, a band-shaped metal plate, film, paper, cloth, ceramic or the like. The belt-shaped body A is supported by rollers that form a conveyor mechanism (not shown), and is conveyed in the longitudinal direction of the belt-shaped body A, for example, in the direction of the leftward arrow shown in FIG. The warm air device is arranged so that the longitudinal direction of the outlet 1a substantially coincides with the width direction of the strip A and faces the strip A. The transport device rotates the roller to move the strip A relative to the outlet 1a. For example, when the liquid is applied along the longitudinal direction of the strip A, the liquid applied to the strip A can be removed by blowing warm air onto the strip A while moving the strip A in the longitudinal direction. It can be dried. The warm air apparatus according to the first embodiment may be applied to any application in which not only the drying process of the strip A but also the heat treatment of the strip A is required.

Hereinafter, the longitudinal direction of the outlet 1a (horizontal direction in FIG. 1) is the lateral direction, the direction in which warm air is blown from the warm air device is the upward direction, and the opposite direction is the downward direction. The direction orthogonal to the lateral direction and the vertical direction is the front-back direction. Particularly, the downstream side (left side in FIG. 2) of the strip A in the transport direction is the front direction, and the upstream side of the transport direction is the rear direction.

The first blower unit 3 includes a first fan 31. The first fan 31 is, for example, a turbo fan, a sirocco fan, or the like. One end of the first supply pipe 32 is connected to the air outlet of the first fan 31, and the other end is connected to one side of the temperature gradient imparting unit 2. A first heater 33 that heats the gas flowing through the first supply pipe 32 is provided in the middle of the first supply pipe 32. The first heater 33 is, for example, an electric heater, a heat medium heater, or the like. The gas blown from the first fan 31 is heated by the first heater 33, and the heated gas is supplied to the temperature gradient imparting unit 2 through the first supply pipe 32.

The second blower unit 4 has the same configuration as the first blower unit 3 and includes a second fan 41. One end of the second supply pipe 42 is connected to the air outlet of the second fan 41, and the other end is connected to the other side of the temperature gradient imparting unit 2. A second heater 43 for heating the gas flowing through the second supply pipe 42 is provided in the middle of the second supply pipe 42. The second heater 43 is, for example, an electric heater, a heat medium heater, or the like. The output of the second heater 43 is different from that of the first heater 33. For example, the second heater 43 has a higher output than the first heater 33, and the second blower unit 4 supplies the gas having a higher temperature than that of the first blower unit 3 to the temperature gradient imparting unit 2.

4 is an exploded perspective view showing a main part of the temperature gradient applying unit 2, FIG. 5 is a sectional view taken along line VV of FIG. 2, FIG. 6 is a sectional view taken along line VI-VI of FIG. 1, and FIG. -VII line sectional view, FIG. 8 is a VIII-VIII line sectional view of FIG. 1, and FIG. 9 is a IX-IX line sectional view of FIG. FIG. 10 is a front view of the mixing chamber front plate 23a.
The temperature gradient applying portion 2 has a hollow rectangular parallelepiped shape that is long in the lateral direction. The temperature gradient applying unit 2 is divided into a plurality of parts, and is rectified with a first rectifying unit 21 and a second rectifying unit 22 that rectify the gas blown from the first air blowing unit 3 and the second air blowing unit 4, respectively. A mixing chamber 23 that mixes the gas and supplies the mixed gas to the nozzle 1 is configured.

The temperature gradient applying section 2 includes a rectangular bottom plate 2a that is long in the lateral direction. The lateral width of the bottom plate 2a is longer than the longitudinal width of the outlet 1a formed in the nozzle 1. First and second side plates 2b and 2c, a front plate 2d and a rear plate 2e are provided at each edge of the bottom plate 2a, and a top plate 2g is provided at the upper end of each plate. The temperature gradient applying unit 2 also includes an intermediate plate 2f that vertically separates the internal space. Further, the temperature gradient applying unit 2 includes a partition wall 2h that separates a lower space separated by the middle plate 2f into front and rear. The partition wall 2h is provided obliquely with respect to the longitudinal direction of the bottom plate 2a in plan view. The inclination direction and inclination angle of the partition wall 2h with respect to the longitudinal direction are not particularly limited.

The front portion of the temperature gradient imparting portion 2 separated by the partition wall 2h constitutes a first duct 21a corresponding to a lower portion of the first rectifying portion 21. More specifically, the first duct 21a is composed of a bottom plate 2a, a front plate 2d, a partition wall 2h, first and second side plates 2b and 2c, and an intermediate plate 2f, and forms a hollow trapezoidal columnar space. In the first duct 21a, the first side plate 2b side is wider than the second side plate 2c side, and the first supply hole 2i is formed in the lower portion of the first side plate 2b. The end of the first supply pipe 32 is connected to the first supply hole 2i.
Further, the rear portion of the temperature gradient imparting portion 2 separated by the partition wall 2h constitutes a second duct 22a corresponding to the lower portion of the second rectifying portion 22. The second duct 22a is composed of a bottom plate 2a, a rear plate 2e, a partition wall 2h, first and second side plates 2b and 2c, and an intermediate plate 2f, and forms a hollow trapezoidal columnar space. The second duct 22a is wider on the second side plate 2c side than on the first side plate 2b side, and a second supply hole 2j is formed in the lower portion of the second side plate 2c. The end of the second supply pipe 42 is connected to the second supply hole 2j.

Further, the temperature gradient imparting unit 2 includes a mixing chamber front plate 23a and a mixing chamber rear plate 23b that divide the upper inside separated by the middle plate 2f into three in the front-rear direction. The mixing chamber front plate 23a and the mixing chamber rear plate 23b are substantially parallel to the longitudinal direction of the bottom plate 2a in a plan view, and the spacing between the mixing chamber front plate 23a, the mixing chamber rear plate 23b, the front plate 2d, and the rear plate 2e is approximately. It is evenly spaced. The front side portion of the temperature gradient imparting section 2 divided by the mixing chamber front plate 23a constitutes a first induction chamber corresponding to the upper portion of the first rectifying unit 21, and the temperature gradient imparting section divided by the mixing chamber rear plate 23b. The rear part of 2 constitutes a second induction chamber corresponding to the upper part of the second rectifying section 22. Further, the central portion in the front-rear direction of the temperature gradient applying section 2 divided by the mixing chamber front plate 23a and the mixing chamber rear plate 23b constitutes the mixing chamber 23.

Specifically, the first guide chamber 21b is composed of a middle plate 2f, a front plate 2d, a mixing chamber front plate 23a, first and second side plates 2b and 2c, and a top plate 2g, and has a horizontally long hollow rectangular parallelepiped space. Is forming. A first straightening hole 21c is formed in a portion of the middle plate 2f forming the bottom of the first guide chamber 21b. The first straightening holes 21c are, for example, a plurality of round holes, and are formed on the entire bottom surface of the first guide chamber 21b. The gas supplied to the first duct 21a is rectified by flowing through the first rectification hole 21c and flows into the first guide chamber 21b.

The second guide chamber 22b is composed of the middle plate 2f, the mixing chamber rear plate 23b, the rear plate 2e, the first and second side plates 2b and 2c, and the top plate 2g, and forms a horizontally elongated hollow rectangular parallelepiped space. ing. A second straightening hole 22c is formed in a portion of the middle plate 2f that constitutes the bottom of the second guide chamber 22b. The second straightening holes 22c are, for example, a plurality of round holes, and are formed on the entire bottom surface of the second guide chamber 22b. The gas supplied to the second duct 22a is rectified by flowing through the second rectification hole 22c and flows into the second guide chamber 22b.

The mixing chamber front plate 23a has a first inflow hole 23c through which the gas blown from the first blowing unit 3 flows into the mixing chamber 23 via the first duct 21a and the first guide chamber 21b. A plurality are formed along the line. The plurality of first inflow holes 23c are long holes that are long in the vertical direction, and are formed at equal intervals over both ends in the longitudinal direction of the mixing chamber front plate 23a. The first inflow holes 23c have substantially the same shape, and their upper and lower positions are also substantially the same.
Further, the mixing chamber rear plate 23b has a second inflow hole 23d through which the gas blown from the second blowing unit 4 flows into the mixing chamber 23 through the second duct 22a and the second guide chamber 22b. Are formed along the line. The configuration of the plurality of second inflow holes 23d is similar to that of the first inflow hole 23c, and thus detailed description thereof will be omitted.

A horizontally elongated trapezoidal first restriction plate 24 that partially closes the first inflow hole 23c is fixed to the front surface of the mixing chamber front plate 23a with a screw. The lateral width of the first restriction plate 24 is a length exceeding the range in which the first inflow hole 23c is formed. The upper side portion of the first regulation plate 24 is a straight line substantially parallel to the longitudinal direction of the bottom plate 2a, and is fixed to the mixing chamber front plate 23a so as to be located above the upper end of the first inflow hole 23c. The ridge line 24b of the lower side portion of the first regulation plate 24 has a linear shape extending over the plurality of first inflow holes 23c, and is inclined with respect to the upper side portion of the first regulation plate 24. The width of the first regulation plate 24 in the vertical direction is shorter from the first side plate 2b side to the second side plate 2c side. That is, the opening area of the first inflow hole 23c is smaller on the first side plate 2b side than on the second side plate 2c side, and the rate of change of the opening area of the first inflow hole 23c in the longitudinal direction is constant.
The first regulation plate 24 has screw holes 24a for fixing the first regulation plate 24 to the mixing chamber front plate 23a at appropriate positions at both ends in the longitudinal direction. The screw hole 24a is a long hole. Therefore, by loosening the screw fixing the first restriction plate 24, the first restriction plate 24 can move in the vertical direction. The opening area of the first inflow hole 23c can be adjusted by moving the first restriction plate 24 in the vertical direction.

On the rear surface of the mixing chamber rear plate 23b, a second oblong trapezoidal second regulation plate 25 that partially closes the second inflow hole 23d is fixed with a screw. The configuration of the second regulation plate 25 is similar to that of the first regulation plate 24. However, the vertical width of the second restriction plate 25 is shortened from the second side plate 2c side to the first side plate 2b side. That is, the opening area of the second inflow hole 23d is smaller on the second side plate 2c side than on the first side plate 2b side, and the rate of change of the opening area of the second inflow hole 23d in the longitudinal direction is constant. In addition, the second restriction plate 25 is attached to the mixing chamber rear plate 23b so that the sum of the opening area of the first inflow hole 23c and the opening area of the second inflow hole 23d at each location along the longitudinal direction becomes substantially equal. It is fixed. That is, the amount of the gas that flows into the mixing chamber 23 through the first inflow hole 23c and the second inflow hole 23d and is mixed is substantially uniform in the longitudinal direction of the mixing chamber 23.
The second regulation plate 25 has the same screw hole as the first regulation plate 24. By loosening the screw fixing the second regulation plate 25 and moving the second regulation plate 25 in the vertical direction, The opening area of the second inflow hole 23d can be adjusted.

The mixing chamber 23 is composed of a middle plate 2f, a mixing chamber front plate 23a, a mixing chamber rear plate 23b, first and second side plates 2b and 2c, and a top plate 2g, and forms a horizontally long hollow rectangular parallelepiped space. ing. A third straightening hole 23e is formed in a portion of the top plate 2g which constitutes the upper surface of the mixing chamber 23. The third rectifying holes 23e are, for example, a plurality of round holes, and are formed on the entire upper surface of the mixing chamber 23. The gas that has flowed into the mixing chamber 23 from the first inflow hole 23c and the second inflow hole 23d is mixed in the mixing chamber 23, and the mixed gas is rectified by flowing through the third rectification hole 23e to the nozzle 1. Supplied.

FIG. 11 is a side sectional view of the nozzle 1. The nozzle 1 includes a lower rectifying chamber 11, a middle rectifying chamber 12, and an upper rectifying chamber 13, which are provided above the mixing chamber 23 in order from the bottom. Each of the lower rectifying chamber 11, the middle rectifying chamber 12, and the upper rectifying chamber 13 has a hollow rectangular parallelepiped shape having substantially the same lateral width as the mixing chamber 23, and a rectifying hole is formed in a plate separating the respective rectifying chambers. A slit-shaped outlet 1a is formed in the upper surface of the upper rectifying chamber 13 along the longitudinal direction. The gas supplied from the temperature gradient imparting unit 2 is first supplied to the lower rectifying chamber 11. The gas supplied to the lower rectification chamber 11 is rectified in the process of flowing from the lower rectification chamber 11 to the middle rectification chamber 12 and from the middle rectification chamber 12 to the upper rectification chamber 13, and the rectified hot air is blown upward from the outlet 1a.

Next, the function and effect of the warm air apparatus according to the first embodiment will be described.
FIG. 12 is a conceptual diagram showing a state of gas flowing into the first and second ducts 21a and 22a from the first and second blowers 3 and 4. 12A is a plan view conceptually showing the gas that has flowed into the first and second ducts 21a and 22a, and FIG. 12B is the side of the hot air device that conceptually shows the gas that has flowed into the first and second ducts 21a and 22a. FIG. The gas blown from the first blower 3 is supplied to the first duct 21a, and the gas blown from the second blower 4 is supplied to the second duct 22a. The gas supplied to the second duct 22a has a higher temperature than the gas supplied to the first duct 21a.
The gas supplied to the first duct 21a flows in a direction parallel to the longitudinal direction of the outlet 1a, that is, in the longitudinal direction of the first duct 21a, and then flows into the first guide chamber 21b through the first flow straightening hole 21c. Since the downstream side of the first duct 21a is formed narrower than the upstream side in the longitudinal direction, it is possible to suppress a decrease in the gas flow rate on the downstream side. Therefore, the air volume of the gas flowing from the first duct 21a into the first guide chamber 21b can be made substantially uniform in the longitudinal direction.
Similarly, the gas supplied to the second duct 22a also flows into the second guide chamber 22b from the second duct 22a. The air volume of the gas flowing into the second guide chamber 22b from the second duct 22a is substantially uniform in the longitudinal direction.

FIG. 13 is a conceptual diagram showing the air volume of gas flowing into the mixing chamber 23 from the first and second guide chambers 21b and 22b. 13A is a plan view conceptually showing the gas flowing into the mixing chamber 23 from the second guide chamber 22b, and FIG. 13B is a plan view conceptually showing the gas flowing into the mixing chamber 23 from the first guide chamber 21b.
The opening areas of the plurality of second inflow holes 23d formed in the mixing chamber rear plate 23b are configured to increase in direct proportion from the second side plate 2c side to the first side plate 2b side. Therefore, as shown in FIG. 13A, the amount of gas flowing from the second guide chamber 22b into the mixing chamber 23 also increases in direct proportion from the second side plate 2c side to the first side plate 2b side.
The opening areas of the plurality of first inflow holes 23c formed in the mixing chamber front plate 23a are configured to increase in direct proportion from the first side plate 2b side to the second side plate 2c side. Therefore, as shown in FIG. 13B, the amount of gas flowing into the mixing chamber 23 from the first guide chamber 21b also increases in direct proportion from the first side plate 2b side to the second side plate 2c side.

FIG. 14 shows the air volume of the gas flowing into the mixing chamber 23 from the first and second blowers 3 and 4 via the first and second guide chambers 21b and 22b, and the mixed state of the gas flowing into the mixing chamber 23. It is a conceptual diagram shown. FIG. 14A is a plan view conceptually showing the air volume of the gas that flows into the mixing chamber 23 from the first and second guide chambers 21b and 22b and is mixed, and FIG. 14B flows into the mixing chamber 23 and the gas that flows in is mixed. FIG. 3 is a side sectional view conceptually showing the state of being open. The gases flowing into the mixing chamber 23 from the first and second guide chambers 21b and 22b are mixed in the mixing chamber 23 as shown in FIG. 14B. Since the sum of the opening areas of the first inflow hole 23c and the second inflow hole 23d at each location along the longitudinal direction of the mixing chamber 23 is equal, the amount of gas mixed in the mixing chamber 23 is as shown in FIG. 14A. It is substantially uniform in the longitudinal direction. Therefore, the air volumes of the gases mixed in the mixing chamber 23 and supplied to the nozzle 1 are substantially uniform in the longitudinal direction. Further, the gas supplied to the nozzle 1 has a linear temperature gradient in the longitudinal direction.

FIG. 15 is a graph showing the temperature measurement result of the gas blown out from the warm air device. The horizontal axis represents the position in the longitudinal direction of the outlet 1a, and the vertical axis represents the temperature of the warm air blown out from the outlet 1a. In FIG. 15, the thin line is the theoretical value of the temperature of the warm air blown out from the air outlet 1a. The broken line shows the allowable range of temperature variation from the theoretical value. The thick line shows the measured value of the temperature of the warm air blown from the air outlet 1a measured at each position in the longitudinal direction. As shown in FIG. 15, the temperature of the gas blown out from the air outlet 1a has a linear temperature gradient, and the temperature variation is in the range of -2.5°C to 2.5°C centering on the theoretical value. It fits inside.

According to the warm air apparatus of Embodiment 1 configured in this way, the temperature of the hot air blown from the air outlet 1a is given a temperature gradient in the longitudinal direction of the air outlet 1a, and the temperature of the air blown from the air outlet 1a is increased. The amount of wind can be made uniform in the longitudinal direction.

Further, in this embodiment, a linear temperature gradient in the longitudinal direction of the outlet 1a can be given to the warm air blown out from the outlet 1a.

Further, since the first and second regulation plates 24 and 25 are fixed to the mixing chamber front plate 23a and the mixing chamber rear plate 23b with screws, the first and second regulation plates are adjusted by adjusting the fixing position of the regulation plate. The opening areas of the inflow holes 23c and 23d can be easily adjusted. That is, it is possible to easily adjust the temperature gradient of the warm air blown out from the air outlet 1a.

Furthermore, since the first and second inflow holes 23c and 23d, which are long holes, are partially closed by the substantially trapezoidal regulation plate, the first and second inflow holes 23c in the longitudinal direction of the outlet 1a, The rate of change of the opening area of 23d can be made constant.

Furthermore, since the gas blown from the first and second blowers 3 and 4 is rectified by the first and second rectifiers 21 and 22 and flows into the mixing chamber 23, the gas is blown out from the outlet 1a. The uniformity of the amount of warm air generated can be improved. Further, a desired temperature gradient can be accurately applied to the gas mixed in the mixing chamber 23.

Furthermore, since the downstream side of the first and second ducts 21a and 22a in the gas flow direction is narrower than the upstream side, the gas in the downstream side of the first and second ducts 21a and 22a is It is possible to suppress a decrease in air volume. If the air volume of the gas flowing from the first and second ducts 21a and 22a into the first and second guide chambers 21b and 22b is substantially uniform, the gas flows into the mixing chamber 23 through the first and second inflow holes 23c and 23d. The amount of gas is substantially proportional to the opening areas of the first and second inflow holes 23c and 23d. Therefore, it is possible to improve the uniformity of the amount of warm air blown out from the air outlet 1a. Further, a desired temperature gradient can be accurately applied to the gas mixed in the mixing chamber 23.

In the first embodiment, a plurality of elongated holes have been described as the first and second inflow holes, but if the configuration is such that the opening area changes along a direction substantially parallel to the longitudinal direction of the air outlet. The shape and number of the first and second inflow holes are not particularly limited. For example, a plurality of round holes may be formed on the entire surface of the mixing chamber front plate and the mixing chamber rear plate, and the opening area may be regulated by the first and second regulation plates.

Further, in the first embodiment, the opening areas of the first and second inflow holes are restricted by partially closing the first and second inflow holes, which are a plurality of elongated holes, by the first and second restriction plates. However, a plurality of holes whose opening areas increase or decrease are formed in the mixing chamber front plate 23a and the mixing chamber rear plate 23b along a direction substantially parallel to the longitudinal direction of the outlet, The second regulation plate may not be provided.

Furthermore, in the first embodiment, an example in which the widths of the first and second ducts in the front-rear direction are made smaller from the upstream side to the downstream side in the gas flow direction has been described. The widths of the first and second ducts in the vertical direction may be reduced from the side to the downstream side.

Furthermore, the arrangement of the first and second ducts, the first and second guide chambers, and the mixing chamber in this embodiment is an example, and the positional relationship of each part is not particularly limited. For example, the first duct and the second duct may be arranged on both sides of the mixing chamber in the front-rear direction and the first and second guide chambers may not be provided.

Furthermore, although the example in which the first and second inflow holes are formed in the opposing mixing chamber front plate and in the mixing chamber rear plate has been described, the first and second inflow holes may be formed in the non-opposing plate or the same plate. Is also good.

In the first embodiment described above, the case where the temperature of the gas blown from the second blower unit 4 is higher than the temperature of the gas blown from the first blower unit 3 has been described. The temperature of the gas blown from the blower unit 3 can be set higher than the temperature of the gas blown from the second blower unit 4. In this case, the temperature gradient of the warm air blown from the outlet 1a is opposite to the temperature gradient of the first embodiment described above.

FIG. 16 shows the temperature measurement result of the gas blown from the warm air device in which the temperature of the gas blown from the first blower unit 3 is set higher than the temperature of the gas blown from the second blower unit 4. It is a graph. The horizontal axis represents the position in the longitudinal direction of the outlet 1a, and the vertical axis represents the temperature of the warm air blown out from the outlet 1a. Similar to FIG. 15, the straight line and the broken line indicate the theoretical value and the allowable range of the temperature gradient, respectively. Even when the temperature of the gas blown from the first blower unit 3 is set to be higher than the temperature of the gas blown from the second blower unit 4, as shown in FIG. 16, it is blown out from the blowout port 1a. The temperature of the gas has a linear temperature gradient, and the temperature variation is within the range of −2.5° C. to 2.5° C. around the theoretical value.

(Embodiment 2)
FIG. 17 is an exploded perspective view of the warm air gradient imparting unit 202 according to the second embodiment. In the warm air apparatus according to the second embodiment, the configurations of the first and second regulation plates 224, 225 and the top plate 2g are different from those of the first embodiment, and therefore, the main difference will be described below.

The top plate 2g according to the second embodiment has a slit 202k for protruding a part of the first and second regulation plates 224, 225 to the outside of the warm air device. The slit 202k is formed at a position corresponding to one end of the first and second regulation plates 224, 225 in a plan view. The slit 202k for projecting the first regulation plate 224 is formed on the first side plate 2b side, and the slit 202k for projecting the second regulation plate 225 is formed on the second side plate 2c side. The width of the slit 202k is substantially the same as the thickness of the first regulation plate 224. The gap between the first and second restriction plates 224 and 225 and the slit 202k is sealed so that gas does not leak from the first and second guide chambers 21b and 22b to the outside.

The first regulation plate 224 has a horizontally long trapezoidal shape, and is formed such that the vertical width on the first side plate 2b side in the vertical direction is longer than that of the first guide chamber 21b, and the corner portion 224c on the first side plate 2b side is slit. It projects from 202k to the outside.
Similarly, the second regulation plate 225 has a horizontally long trapezoidal shape, and is formed such that the vertical width on the second side plate 2c side in the vertical direction is longer than that of the second guide chamber 22b, and the corner portion 225c on the second side plate 2c side. Project from the slit 202k to the outside.

According to the warm air device according to the second embodiment, the first and second inflow holes 23c are adjusted by adjusting the positions of the corner portions 224c and 225c of the first restricting plate 224 and the second restricting plate 225 that protrude to the outside of the warm air device. , 23d can be adjusted to adjust the temperature gradient of the warm air blown out from the air outlet 1a.

The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above meaning but by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

DESCRIPTION OF SYMBOLS 1 Nozzle 1a Air outlet 2 Temperature gradient imparting part 2a Bottom plate 2b First side plate 2c Second side plate 2d Front plate 2e Rear plate 2f Middle plate 2g Top plate 2h Partition wall 2i First supply hole 2j Second supply hole 3 First blower part 4 2nd ventilation part 11 Lower rectification chamber 12 Middle rectification chamber 13 Upper rectification chamber 21 1st rectification part 21a 1st duct 21b 1st guide chamber 21c 1st rectification hole 22 2nd rectification part 22a 2nd duct 22b 2nd guidance chamber 22c Second straightening hole 23 Mixing chamber 23a Mixing chamber front plate 23b Mixing chamber rear plate 23c First inflow hole 23d Second inflow hole 23e Third straightening hole 24 First regulating plate 24a Screw hole 24b Ridge 25 Second regulating plate 31 First Fan 32 First supply pipe 33 First heater 41 Second fan 42 Second supply pipe 43 Second heater A Strip

Claims (6)

In a warm air device that has a nozzle having a slit-shaped outlet for blowing warm air, and blows warm air from the nozzle to an object,
Two blowers that blow gases with different temperatures,
And a mixing chamber that mixes the gas flowing in from each of the inflow holes and supplies the gas blown from each of the air inflow ports to the nozzle.
The inflow hole into which the gas blown from one of the blower sections flows and the inflow hole into which the gas blown from the other blower section flows in are arranged along a direction substantially parallel to the longitudinal direction of the blowout port. The opening area of one of the inflow holes is smaller on one end side in the direction than on the other end side, and the opening area of one of the inflow holes at each location along the direction, and The warm air device whose sum of the opening area of the inflow hole is substantially equal to that of the inflow hole. The warm air device according to claim 1, wherein the rate of change of the opening areas of the plurality of inflow holes in the direction is constant. The warm air device according to claim 1 or 2, further comprising: a restriction plate that partially closes the inflow hole. The inflow hole is a long hole intersecting the direction,
The warm air device according to claim 3, wherein the restriction plate has a linear ridge line extending over a plurality of the long holes, and each of the long holes is partially closed. The warm air apparatus according to any one of claims 1 to 4, further comprising: a rectifying unit configured to rectify the gas blown from the blower unit to flow into the inflow hole. The rectification unit,
A duct in which the length in the direction is longer than that of the air outlet, and the gas blown from the blower unit flows in the direction,
A rectifying hole which is formed in the duct along the direction and which sends out gas flowing through the duct to the inflow hole,
The duct is
The warm air device according to claim 5, wherein a gas flow direction downstream side in the direction is narrower than a gas flow direction upstream side.

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