JP2013217589A - Parallel-flow dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a parallel-flow dryer capable of drying foods early and homogeneously although having a simple configuration.SOLUTION: There is provided a parallel-flow dryer that includes a warming portion and a drying chamber, and blow warm air to foods placed in the drying chamber parallel. The warming portion is a box body having an air intake for taking outside air in, an electric heater warming outside air into warm air, a fan blowing the warm air, an air supply port for blowing the warm air into the drying chamber, and a suction port for circulation sucking the warm air in the warming portion from the drying chamber. The drying chamber includes an upstream-side chamber, a downstream-side chamber and a center drying chamber having a plurality of horizontal shelves, wherein the upstream-side chamber has a blowout port communicating with the air supply port, an upstream-side straightening portion which straightens the warm air parallel to the foods, and an upstream-side shelf receivers supporting the horizontal shelves, and the downstream-side chamber has an air supply port for circulation communicating with the warming portion, an exhaust port for exhausting the hot air, a downstream-side straightening portion which straitens the hot air parallel to the foods, and a downstream-side shelf receiver supporting the horizontal shelves.

Description

  The present invention relates to a parallel flow dryer that feeds warm air in parallel to food stored in a drying chamber and dries the food, and in particular, a heating unit that warms air to make warm air. And a drying chamber provided with an upstream rectification unit and a downstream rectification unit that rectifies the warm air in parallel with the food.

Conventionally, in a food dryer, air is circulated by rotating a propeller-like blade disposed in the drying chamber, and the food is dried in the drying chamber having a dehumidifier and a dryer. Technology has been implemented in which it is housed and dried and dehumidified by alternately applying hot air or cold air.
However, there is a decrease in the problem and yield that the drying efficiency becomes low due to the unevenness of the wind direction by relying on one blade for air circulation and the unevenness of drying due to the wind direction and the air volume not being regulated in particular. There was a problem to do.
Therefore, in order to solve such problems, in recent years, a technology relating to a food dryer for drying food uniformly and efficiently has been developed, and several inventions have already been disclosed.

Patent Document 1 discloses a device related to a dried radish drying device having a name “cut dried radish drying device” in which the pressure in the drying chamber is increased.
Hereinafter, the device disclosed in Patent Document 1 will be described. The device disclosed in Patent Document 1 includes a drying chamber and a hot air generator for supplying hot air to the drying chamber, and the drying chamber is provided with hot air blowing holes uniformly distributed over the entire surface. A hot air introduction part that communicates with the hot air generator is formed under the floor, and exhaust holes are evenly distributed and opened throughout the ceiling. The rate is made smaller than the opening rate of the hot air blowing through hole of the snowboard floor.
In the dried radish drying device with such features, warm air blown uniformly from the entire surface of the slatted floor is uniformly exhausted from the entire ceiling surface, and the hot air is uniformly dispersed in the drying chamber. Rise. Further, the opening ratio of the hot air blown through the exhaust air outlet is smaller than that of the hot air blowing hole, so that the rise of the hot air is moderated and the pressure in the drying chamber is increased to promote the drying. Therefore, uneven distribution of warm air does not occur, so that uneven drying does not occur. Furthermore, warm air spreads over the entire drying chamber in a well-balanced manner, so that not only the drying efficiency is improved, but also the dry state becomes homogeneous and the quality can be improved.

Next, Patent Document 2 discloses an invention relating to a dried straw manufacturing apparatus that dries the straw stored in a sealed storage chamber under the name of “dried straw manufacturing apparatus”.
The invention disclosed in Patent Document 2 includes a temperature controller that adjusts the interior of the accommodation chamber to a constant temperature, an air circulation portion that sucks air from the accommodation chamber from the top and exhausts it from the side of the accommodation chamber, and an air circulation portion. The blower is provided in the vicinity of the upper portion of the storage chamber and allows air adjusted to a constant temperature to flow into the storage chamber from the side surface of the storage chamber. And a rectifying unit that blows out in a fixed direction, an exhaust port having an exhaust fan that exhausts the air in the storage chamber to the outside, an intake port having an intake fan that sucks outside air into the storage chamber, a temperature controller, and a blower And a control unit that controls the operation of the exhaust fan and the intake fan so as to switch the temperature in the accommodation chamber between the first temperature and the second temperature, and two air circulation units are provided. And Each is provided on a pair of opposing side surfaces of the storage chamber, and two rectifying parts are provided corresponding to the air circulation parts, and air is jetted out in a direction in which they face each other. .
In the apparatus for producing dried straw having such characteristics, air from the air circulation unit is exhausted into the accommodation chamber through the rectification unit, so that uniform air circulates in the accommodation chamber. Therefore, there is no unevenness in drying of the dried straw stored in the storage chamber, and it is possible to produce dried straw of a certain quality.

Next, Patent Document 3 discloses an invention relating to a dried persimmon drying apparatus having an air surface inflow / outflow apparatus in a drying chamber under the name of “dried persimmon drying apparatus and a method for producing an anchovy using the same”. .
The invention disclosed in Patent Document 3 includes an air circulation unit having an air circulation path for allowing air discharged from the downstream of the drying chamber to flow in from the upstream side of the drying chamber, and part of the circulating air discharged from the drying chamber. Or cooling dehumidification device having exhaust heat means for returning the cooling air with reduced humidity by taking it all into the circulating air and taking out the generated heat as hot air by heat exchange and exhaust heat Exhaust heat hot air switching device that is connected to the means and switches the hot air discharged from the exhaust heat means to either the drying chamber or the air circulation unit or to discharge it to the outside, and the drying chamber or the air circulation unit An electric heater that is disposed inside and heats the air, a detection device that detects the temperature and humidity of the drying chamber, and a cooling and dehumidification device based on temperature information and humidity information detected by the detection device Characterized by comprising control means for controlling the temperature and humidity control to a drying chamber the operation of the electric heater and the exhaust heat hot air switching device.
In the dried rice cake drying apparatus having the above characteristics and the method for producing an anchovy cake using the same, the drying chamber is also dried by the dried rice cake drying device having a frame tent structure that can be easily assembled and disassembled. It has the effect of being adjusted to a temperature and humidity range suitable for. Therefore, it is possible to produce an anchovy of good quality. Furthermore, this dried cocoon drying device is less expensive than a general dehumidifying device, and uses the exhaust heat generated by the cooling dehumidifying device by exchanging fresh fresh air with hot air. Therefore, drying can be promoted and energy saving effect can be expected.

Japanese Utility Model Publication No. 6-38590 Japanese Patent No. 4394556 JP 2007-105003 A

  However, in the invention disclosed in Patent Document 1, warm air is blown uniformly from the entire surface of the slatted floor and directly hits the dried radish. Therefore, there is a possibility that the stored dried radish is blown away by the hot air and overlaps and cannot be dried uniformly.

  Next, in the invention disclosed in Patent Document 2, since the control unit for controlling the temperature in the accommodation chamber is provided, the structure becomes slightly complicated. Therefore, there seems to be a limit and difficulty in downsizing.

  In the invention disclosed in Patent Document 3, uniform mesh sheets are provided on the upstream side and the downstream side of the drying chamber, respectively. Since the warm air is supplied from above the mesh sheet, there is a possibility that the amount and speed are not equal in the height direction. In this case, since warm air does not flow in an orderly manner from the upstream side to the downstream side of the drying chamber, it is considered that pressure unevenness occurs in the drying chamber. Therefore, it may be difficult to dry the food uniformly.

  The present invention has been made in response to such a conventional situation, and provides a parallel flow dryer capable of drying food quickly and homogeneously while having a simpler configuration as compared with the prior art. With the goal.

In order to achieve the above object, a parallel flow dryer according to the first aspect of the present invention includes a heating unit that warms air to warm air, and a drying chamber that is disposed below the heating unit. The parallel flow dryer is configured to feed warm air in parallel to the food contained in the drying chamber and to dry the food, and the heating unit is opened on one side and is externally provided. An air intake port for taking in air, an electric heater for heating the air taken in from the air supply port to warm air, a fan for sending warm air, and a drying chamber communicating with the hot air into the drying chamber An air supply port for supplying air and a circulation intake port that communicates with the drying chamber and sucks warm air from the drying chamber into the heating unit. The drying chamber includes an upstream side air chamber and a downstream side. It consists of a side air chamber and a central drying chamber that is sandwiched between them. The upstream air chamber is connected to the air outlet and the hot air parallel to the food. An upstream side rectification unit that rectifies and an upstream shelf holder that supports a plurality of horizontal shelves on which food is placed are provided, and the downstream air chamber communicates with the heating unit and circulates hot air to the heating unit. A circulation air supply port, an exhaust port for exhausting hot air to the outside, a downstream rectification unit that rectifies the hot air in parallel to the food, and a downstream shelf support that supports the horizontal shelf, The drying chamber includes a horizontal shelf.
In the parallel flow dryer having such a configuration, the warm air sent from the heating unit to the drying chamber through the air supply port is located upstream of the central drying chamber that stores the food that is the object to be dried. Since it is also stored in the air chamber and the downstream air chamber, the upstream air chamber and the downstream air chamber act as a buffer, and the hot air is filled around the food stored in the drying chamber. . Therefore, since the temperature drop of the warm air around the food is small and uniform, the food is dried evenly at an early stage regardless of the storage position.
Moreover, since both an upstream rectification | straightening part and a downstream rectification | straightening part rectify | warm warm air in parallel with respect to a foodstuff respectively, warm air becomes a laminar flow between these. Furthermore, since the plurality of horizontal shelves are supported by the upstream shelf receiver and the downstream shelf receiver respectively provided in the upstream air chamber and the downstream air chamber, the food placed on the horizontal shelf becomes a laminar flow It receives wind pressure from the side by warm air. As described above, since the food does not receive wind pressure from below, the food is prevented from flying up and scattered by the hot air.
Furthermore, the downstream air chamber is provided with a circulation air supply port for circulating hot air to the heating section and an exhaust port for exhausting the hot air to the outside. The part is again sent to the drying chamber via the heating part, and the remaining warm air is exhausted to the outside. Therefore, the temperature in the drying chamber is prevented from excessively rising or falling, and an appropriate drying temperature is maintained. Note that the pressure drop in the drying chamber due to the exhaust of some warm air to the outside is caused by a new fan that is taken in from the air supply port when the fan that sends out the warm air provided in the warming section operates. After the outside air is heated, it is compensated by being sent into the drying chamber.

Next, the parallel flow dryer according to the invention described in claim 2 is the parallel flow dryer according to claim 1, wherein the flow resistance to the warm air of the downstream rectification unit is the flow resistance to the warm air of the upstream rectification unit. It is characterized by being larger than.
In the parallel flow dryer having such a configuration, the “flow resistance” reflects a reaction from the rectifying unit that is received when hot air passes through the rectifying unit. In the downstream rectification unit, this reaction occurs in the direction of the upstream rectification unit, and in the upstream rectification unit, the reaction occurs in the direction opposite to the downstream rectification unit. Accordingly, the fact that the downstream side rectifying unit is larger than the flow resistance of the upstream side rectifying unit is that the pressure loss is greater when the downstream side rectifying unit is passed than when the downstream side rectifying unit is passed. Therefore, in the parallel flow dryer having the above-described configuration, in addition to the operation of the first aspect of the present invention, the parallel flow dryer has an operation of keeping pressure in the space between the upstream rectification unit and the downstream rectification unit. Therefore, in this space, the pressure of the warm air rises and the heat storage is promoted.

Next, a parallel flow dryer according to a third aspect of the present invention is the parallel flow dryer according to the first or second aspect, wherein the upstream rectification unit and the downstream rectification unit are the upstream air chamber and the downstream, respectively. A plurality of ventilation holes are formed at the boundary between the side air chamber and the central drying chamber (hereinafter referred to as upstream and downstream ventilation holes), and the diameters of the upstream and downstream ventilation holes are as follows: Both are characterized by expanding as they descend from the ceiling to the bottom of the drying chamber.
In the parallel flow dryer having such a configuration, the upstream rectification unit is installed at the boundary between the upstream air chamber and the central drying chamber, and the upstream air chamber has an air outlet that communicates with the air supply port of the heating unit. Since it comprises, the quantity of the warm air which blows off from a blower outlet becomes a structure which decreases as it falls from the ceiling part of a drying chamber to a bottom face part. On the other hand, since the diameter of the upstream side vent hole increases as it descends from the ceiling part to the bottom part of the drying chamber, the flow resistance decreases, and more hot air can be introduced into the drying chamber along this direction. That is, in the parallel flow dryer having the above-described configuration, in addition to the action of the invention according to claim 1 or claim 2, as the warm air passing through the upstream vent hole is lowered from the ceiling portion to the bottom portion of the drying chamber. It acts to increase, and further acts to make it approximately equivalent. Moreover, it has the same effect | action also in a downstream vent hole. Therefore, in quoting the invention of claim 1, a more uniform parallel flow is formed between the upstream side vent hole and the downstream side vent hole. Moreover, when quoting the invention of Claim 2, in addition to the parallel flow being formed, the pressure of the hot air in the drying chamber rises and the heat is stored.

Furthermore, the parallel flow dryer according to the invention described in claim 4 is the parallel flow dryer according to any one of claims 1 to 3, wherein the plurality of horizontal shelves are provided with a plurality of protrusions on the upper surface. It is characterized by that.
In the parallel flow dryer having such a configuration, in addition to the operation of the invention according to any one of claims 1 to 3, the food is lifted from the upper surface of the horizontal shelf by the height of the protrusion, and the ventilation space is formed. Since it occurs, the bottom surface of the food is also dried.

According to the parallel flow dryer of the first aspect of the present invention, the food is dried at an early stage regardless of the storage position, so that a high quality dried food can be efficiently completed. Further, since the food is prevented from being scattered by the hot air, the food can be dried uniformly and the food can be prevented from being damaged.
Moreover, since an appropriate drying temperature is maintained, it has the effect that the dried food of a moderate dry state can always be manufactured. And this effect is exhibited by providing an air supply port and an exhaust port, and a complicated control part is not required. Therefore, it can be said that it is an excellent feature not found in the prior art that such advantageous effects can be exhibited while having a simple structure. Furthermore, since the simple structure can be easily and inexpensively manufactured and can be reduced in size, it can be easily introduced not only in business establishments but also in general households.

  According to the parallel flow dryer according to claim 2 of the present invention, in addition to the effect of the invention according to claim 1, heat is stored by air existing in the space between the upstream rectification unit and the downstream rectification unit. Therefore, the food can be dried at an early stage, and the air can be heated to a high temperature with little heating. Thus, energy can be saved. Furthermore, since the pressure of the warm air existing in the space between the upstream rectification unit and the downstream rectification unit is increased, the hot air reaches the details of the food, and the food can be brought into a homogeneous dry state.

  According to the parallel flow dryer of claim 3 of the present invention, in addition to the effect of the invention of claim 1 or claim 2, the amount of hot air passing through the upstream vent hole and the downstream vent hole is Since it becomes substantially the same as it descends from the ceiling portion of the drying chamber to the bottom surface portion, a constant (uniform) drying state can be realized regardless of the height position of the drying chamber.

  According to the parallel flow dryer according to claim 4 of the present invention, in addition to the effect of the invention according to any one of claims 1 to 3, the lower surface of the food is also dried. Dry food can be manufactured. Moreover, since it is not necessary to make the horizontal shelf into a mesh structure, foods that are small enough to spill from the mesh can be accommodated. Furthermore, in this case, even when food containing a large amount of moisture is placed, moisture does not drip on the bottom surface of the drying cabinet, so the inside of the drying cabinet can be kept clean. However, when a plurality of horizontal shelves are provided, small holes may be provided in the horizontal shelves to improve the air permeability between the horizontal shelves.

(A) is a front view of the parallel flow dryer which concerns on an Example, (b) is a perspective view. It is a prototype photograph of the parallel flow dryer concerning an example. (A) And (b) is the front view and oblique perspective drawing about the air circulation in FIG. 1 (a) and FIG.1 (b), respectively. It is a top view of a pair of rectification parts in a parallel flow dryer concerning an example. It is a perspective view of the horizontal shelf of the parallel flow dryer which concerns on an Example.

The parallel flow dryer according to the embodiment of the present invention will be described in detail with reference to FIGS. Note that the components shown in FIG. 1 are denoted by the same reference numerals in FIGS. 2 to 4 and description thereof is omitted.
FIG. 1A is a front view of the parallel flow dryer according to the embodiment, and FIG. 1B is a perspective view. In FIG. 1A, the front door is omitted.

As shown to Fig.1 (a), the parallel flow dryer 1 of a present Example is comprised from the box-shaped heating part 2 and the box-shaped drying chamber 7 installed in the downward direction. The heating unit 2 communicates with an air supply port 3 that takes air into the back surface thereof, an electric heater 4 that warms the air to make warm air, a delivery fan 5 that sends out the warm air, and a drying chamber 7. An air supply port 6 for supplying warm air into the drying chamber 7 and a circulation intake port 17 for communicating with the drying chamber and sucking warm air from the drying chamber 7 into the heating unit 2 are provided. In addition, the bottom face of the heating unit 2 is simultaneously a drying chamber ceiling 7a, and the air supply port 3 is always open.
The drying chamber 7 has a blowout port 8 for blowing warm air from the air supply port 6 to the drying chamber 7, an upstream air chamber 9 provided immediately below the blowout port 8, and a position facing the upstream air chamber 9. The downstream air chamber 10 provided in the interior, the circulation air inlet 16 that opens directly above the downstream air chamber 10, and the back surface of the drying chamber 7 located in the downstream air chamber 10 are provided with hot air outside. And an exhaust port 15 for exhausting the air. The pair of the upstream air chamber 9 and the downstream air chamber 10 are arranged directly on the upper surface of the drying chamber bottom surface 7b, and are each a frame assembly assembled in a rectangular parallelepiped shape. It is. Among these surfaces, current plates 11 and 12 are provided on the vertical surfaces forming the boundary surfaces of the upstream air chamber 9 and the downstream air chamber 10 with a central drying chamber 7c described later. The exhaust port 15 is always open.
Furthermore, a region surrounded by the current plates 11 and 12, the drying chamber ceiling 7a, and the drying chamber bottom surface 7b is a central drying chamber 7c. In the central drying chamber 7c, a plurality of horizontal shelves 13 on which food is placed are provided in parallel, and both ends thereof are locked to the rectifying plates 11 and 12 by the upstream shelf receiver 14a and the downstream shelf receiver 14b, respectively. ing. That is, the current plates 11 and 12 and the plurality of horizontal shelves 13 are perpendicular to each other. The pair of upstream air chambers 9, the downstream air chambers 10, and the plurality of horizontal shelves 13 are configured to slide independently in the front-rear direction and to be taken in and out of the drying chamber 7. Moreover, the shape and material of the foodstuff which can be accommodated are not specifically limited.

Next, as shown in FIG.1 (b), in the parallel flow dryer 1 of a present Example, the several baffle holes 11a-11e which have five types of diameters in the rectifying plate 11 of an upstream are diameter. They are sorted by size and arranged from the upper air chamber top surface 9a to the drying chamber bottom surface 7b. Also in the downstream rectifying plate 12, a plurality of vent holes 12a to 12e having five types of diameters are similarly separated and arranged from the downstream air chamber top surface 10a to the drying chamber bottom surface 7b. Therefore, the vent holes 11a to 11e and the vent holes 12a to 12e are arranged at the same height. Of the plurality of horizontal shelves 13, the uppermost horizontal shelf 13 has one end locked between the vent hole 11a and the vent hole 11b, and the other end locked between the vent hole 12a and the vent hole 12b. The Similarly, the remaining horizontal shelves 13 are also locked.
When the parallel flow dryer 1 is operated, the front door 18 connected to the front end of the drying chamber bottom surface 7b is closed by the hinge 18a, and the measured temperature and drying time inside the drying chamber 7 are displayed on the display panel. 19 is displayed as a numerical value. The temperature of the hot air can be freely set by operating a dial (not shown), and the actually measured temperature is constantly measured by a thermometer (not shown) installed in the vicinity of the circulation air inlet 16. .

Next, the parallel flow dryer according to the example will be described in more detail with reference to FIG.
FIG. 2 is a prototype photograph of the parallel flow dryer according to the example. In the following, although reference numerals are not attached to FIG. 2, the same constituent elements will be described with the same reference numerals while referring to FIGS. 1 (a) and 1 (b).
As shown in FIG. 2, in the parallel flow dryer 1 of this embodiment, food (shiitake) is placed on one surface on a plurality of horizontal shelves 13, and one of the horizontal shelves 13 is pulled out to the front. It is. In addition, the upstream side air chamber 9 does not include the rectifying plate 11, and the plurality of horizontal shelves 13 are respectively locked to the upstream side air chamber 9 by the upstream side shelf receiver 14a. The side shelf receiver 14a also serves as a rectifying unit. The plurality of horizontal shelves 13 have a mesh structure (see the lowermost level), and a protective sheet is laid on the horizontal shelves 13 on which food is placed.

Next, air circulation in the parallel flow dryer 1 will be described with reference to FIG. 3 (a) and 3 (b) are a front view and an oblique perspective view of the air circulation in FIGS. 1 (a) and 1 (b), respectively.
As shown in FIG. 3A, the air (filled arrow in the figure) taken in from the air supply port 3 is heated and becomes warm air while passing over the electric heater 4 in parallel. The temperature of the warm air is specifically normal temperature (room temperature) to 60 ° C. The warm air passes through the delivery fan 5, the air supply port 6, and the air outlet 8 and is blown out into the upstream side air chamber 9. The warm air blown into the upstream air chamber 9 passes through the air holes 11a to 11e (see FIG. 1B) of the rectifying plate 11 and is sent to the central drying chamber 7c. The supplied warm air further passes through the vent holes 12a to 12e (see FIG. 1B) of the rectifying plate 12 and is introduced into the downstream side air chamber 10, and a part thereof is the exhaust port 15. The remaining air passes through the circulation air supply port 16 and the circulation suction port 17 and is returned to the heating unit 2. In the heating unit 2, the warm air that has returned and the air that has been newly taken in from the air supply port 3 are mixed and supplied to the air supply port 6 while being heated again. The reason why such air circulation is possible is that the air inside the heating unit 2 is mainly sucked into the air supply port 6 and the exhaust port 15 by the operation of the delivery fan 5.

Subsequently, FIG. 3B shows three-dimensionally the circulation of air inside the parallel flow dryer 1. When the air (transparent arrow in the figure) taken in from the air supply port 3 is supplied in the direction of the air supply port 6 through the inside of the heating unit 2 by the operation of the delivery fan 5 (see FIG. 1A). Then, it collides with the side wall 2a of the heating part 2 and its direction is bent downward, and the upstream air chamber 9 is lowered. The descending warm air passes through the ventilation holes 11a to 11e (see FIG. 1B) of the rectifying plate 11, and then bends substantially at a right angle and enters the central drying chamber 7c. When the invading hot air reaches the rectifying plate 12, it passes through the vent holes 12 a to 12 e (see FIG. 1B), bends at a substantially right angle, and rises along the downstream air chamber 10. A part of the rising warm air flows into the exhaust port 15 and the rest passes through the circulation suction port 17. The warm air that has passed through the circulation suction port 17 is bent at a substantially right angle by colliding with the side wall 2b and the heating unit ceiling 2c of the heating unit 2, and then merges with the air taken in from the air supply port 3. . Thereafter, the combined air is supplied to the air supply port 6 as described above, and air is circulated.
The warm air rising up the downstream side air chamber 10 is hotter than the air outside the parallel flow dryer 1 and has a pressure equal to or higher than the atmospheric pressure, so that air flows from the exhaust port 15 to the downstream side air chamber 10. There is no backflow inside. Further, since the warm air that has passed through the circulation suction port 17 is pulled toward the air supply port 6 by the operation of the supply fan 5, it is not exhausted from the air supply port 3.

Next, the rectifying unit of the parallel flow dryer according to the example will be described in more detail with reference to FIG.
FIG. 4 is a plan view of a pair of rectifying units in the parallel flow dryer according to the example.
As shown in FIG. 4, in the parallel flow dryer 1 of this example, the diameters of the air holes 11 a to 11 e drilled in the upstream rectifying plate 11 increase from the upper end toward the lower end. The upper end is in contact with the upstream air chamber upper surface 9a (see FIG. 1B), and the lower end is in contact with the drying chamber bottom surface 7b (see FIG. 1B).
Further, the diameters of the air holes 12a to 12e formed in the downstream rectifying plate 12 increase from the upper end in contact with the downstream air chamber upper surface 10a (see FIG. 1B) toward the lower end in contact with the drying chamber bottom surface 7b. It is getting bigger as well.
Among these vent holes 11a to 11e and 12a to 12e, the ones located at the same height are larger in the diameter of the vent holes 11a to 11e than the vent holes 12a to 12e in any of the five types of diameters. .

Furthermore, it demonstrates in detail about the horizontal shelf of the parallel flow dryer which concerns on an Example using FIG.
FIG. 5 is a perspective view of a horizontal shelf of the parallel flow dryer according to the example.
As shown in FIG. 5, a plurality of protrusions 13 a protruding upward are evenly distributed on the shelf surface 13 b of the horizontal shelf 13. A minute hole 13c is formed between the protrusion 13a and the shelf surface 13b. That is, the protrusion 13a is raised on an arc and can be said to be substantially tunnel-shaped. Specifically, the height of the protrusion 13a is about 5 mm. This is a structure common to all of the plurality of horizontal shelves 13.

  In the parallel flow dryer 1 of the present embodiment, the upstream side air chamber 9 having an open structure on the upstream side air chamber upper surface 9a is provided immediately below the outlet 8 and forms a vertical surface of the upstream side air chamber 9. Since the current plate 11 and the plurality of horizontal shelves 13 are perpendicular to each other, the warm air flows in parallel to the horizontal shelf 13 by passing through the plurality of vent holes 11a to 11e. Therefore, the food placed on the horizontal shelf 13 receives wind pressure from the direction of the current plate 11. Moreover, since the warm air from the direction of the baffle plate 11 is obtained by bending the warm air from the outlet 8 at a substantially right angle, the speed is sufficiently reduced. Therefore, since hot air is not strongly blown from the vertical direction to the food placed on the horizontal shelf 13, the food is prevented from flying up and scattering.

  Next, the warm air introduced from the upstream air chamber upper surface 9 a tends to decrease in speed and air volume as it moves away from the outlet 8. On the other hand, the air flow holes 11a to 11e are formed in the rectifying plate 11, and all of the diameters increase from the upstream air chamber upper surface 9a toward the drying chamber bottom surface 7b. Of warm air is introduced into the drying chamber 7. That is, the amount of warm air passing through the vent holes 11a to 11e has an effect that it is substantially equal while descending from the drying chamber ceiling 7a to the drying chamber bottom surface 7b.

Moreover, since the baffle plate 12 and the plurality of horizontal shelves 13 that form the vertical surface of the downstream side air chamber 10 are at right angles to each other, the hot air passes through the plurality of vent holes 12a to 12e so that the horizontal shelf 13 It flows out in parallel to.
Furthermore, since the vent holes 11a to 11e and 12a to 12e located at the same height are larger in diameter than the vent holes 12a to 12e in any of the five types of diameters, The amount of air passing through the air holes 12a to 12e is smaller than the amount of air passing through the air holes 11a to 11e. Accordingly, the hot air is stagnated particularly on the upstream side of the rectifying plate 12, and the hot air is stored in the space between the rectifying plates 11 and 12. Therefore, it has the effect | action that a heat storage is accelerated | stimulated while the pressure of warm air rises in this space.
On the other hand, since the downstream air chamber 10 downstream of the rectifying plate 12 is provided with the exhaust port 15 and the circulation air supply port 16, the hot air is circulated to the exhaust and heating unit 2. The pressure loss occurs due to the presence of the rectifying plate 12, and the pressure in the downstream side air chamber 10 becomes negative compared to the central drying chamber 7c. In other words, the pressure in the central drying chamber 7c is higher than that in the downstream air chamber 10 by the amount of pressure loss caused by the passage of warm air through the rectifying plate 12, and the central drying chamber 7c It is possible to exhibit a function like a warm air reservoir until it passes through and to more effectively exhibit the function of drying in the central drying chamber 7c. Moreover, by providing the downstream side air chamber 10 on the downstream side of the central drying chamber 7c with the exhaust port 15, the heat of the central drying chamber 7c is not directly released to the outside, and also in this respect, the drying function is effectively exhibited. It is possible. In other words, the downstream air chamber 10 functions as a buffer region for pressure and heat loss by installing the current plate 12.

  Next, since the plurality of protrusions 13a are evenly distributed on the shelf surface 13b of the horizontal shelf 13, the food is lifted from the shelf surface 13b and a ventilation space is generated, so the lower surface of the food is also dried. In addition, since the minute holes 13c are formed on the back surface of the protrusion 13a, the hot air flows between the plurality of horizontal shelves 13, and the pressure in the central drying chamber 7c becomes equal.

  Further, part of the warm air that has passed through the plurality of vent holes 12 a to 12 e and has flowed into the downstream side air chamber 10 is mixed with the air newly taken in from the air supply port 3, and returns to the drying chamber 7 again. It is aired. Therefore, the temperature in the drying chamber 7 is prevented from excessively rising or falling, and an appropriate drying temperature is maintained.

As described above, according to the parallel flow dryer 1 of the present embodiment, the hot air pressure rises in the space between the rectifying plates 11 and 12 and the heat storage is promoted, so that the food can be efficiently used. Can be dried. In addition, since a part of the warm air is supplied to the air supply port 6 and reused, energy efficiency is improved by suppressing exhaust heat while performing dehumidification drying.
When this point is described in detail, since the downstream air chamber 10 becomes a buffer region for pressure and heat loss when the rectifying plate 12 is installed, the pressure and temperature of the warm air in the drying chamber 7 by the rectifying plate 12. Can be kept high. Further, the stored high-pressure and high-temperature hot air is sent to the exhaust port 15 and the circulation air-supply port 16 through the buffer region called the downstream side air chamber 10, so the stored hot air and the exhaust means Compared with the prior art (refer patent document 1) which adjoins, it is possible to maintain the pressure and calorie | heat amount of the drying chamber 7 higher. In addition, since the pressure and heat loss due to the exhaust port 15 and the circulation air supply port 16 are small, it is not necessary to increase the discharge pressure of the delivery fan 5 to compensate for this loss. Efficiency has improved.

In addition, since the amount of warm air passing through the vent holes 11a to 11e does not depend on the height of the drying chamber 7, the amount of air can be made substantially equal in any of the vicinity of the plurality of horizontal shelves 13. In addition, since the micro holes 13c are formed in the horizontal shelf 13 and the warm air circulates between the plurality of horizontal shelves 13, the food can be evenly dried regardless of the storage position, and a high-quality dried food can be completed. it can.
In addition, since the food is lifted by providing the plurality of protrusions 13a and the lower surface thereof is also dried, the trouble of turning the food over can be saved, and at the same time, a homogeneous dry food can be produced. However, there is a possibility that the food is lifted by the hot air, but only the parallel flow of hot air hits the food, and since the hot air is sufficiently slowed down, the food is not scattered. It can be avoided. Therefore, the food can be uniformly dried and can be prevented from being damaged without moving on the shelf surface 13b of the horizontal shelf 13 and being stacked with other foods or falling from the horizontal shelf 13.

  Furthermore, since the inside of the drying chamber 7 is maintained at an appropriate temperature, there is no excessive drying due to a temperature rise or insufficient drying due to a low temperature, and it is possible to always produce a dried food in an appropriate dry state. The effect is that the air supply port 3 and the exhaust port 15 are provided, and the air inside the heating unit 2 is sucked into the air supply port 6 and the exhaust port 15 mainly by the operation of the delivery fan 5. Brought about by Thus, for example, the above-described maintenance effect is exhibited even though a complicated configuration such as a control unit (see Patent Document 2) and a waste heat hot air switching device (see Patent Document 3) found in the prior art is not required. What can be done is an excellent effect over the prior art.

In addition, since the parallel flow dryer 1 is composed of the heating unit 2 and the drying chamber 7 installed below the heating unit 2, it can be manufactured easily and inexpensively. Further, since the plurality of horizontal shelves 13 are arranged in parallel inside the drying chamber 7, the size can be easily reduced and a large installation area is not required.
Further, since the plurality of horizontal shelves 13 and the upstream air chamber 9 and the downstream air chamber 10 can be taken in and out independently from the drying chamber 7, a horizontal shelf 13 that does not have the micro holes 13c should be prepared. For example, it is possible to replace the horizontal shelf 13 as appropriate according to the moisture content of the food. Thus, since the parallel flow dryer 1 has versatility, it can be easily introduced not only in business establishments but also in general households.

In addition, the structure of the parallel flow dryer of this invention is not limited to what is shown in a present Example. For example, the ratio of the diameters of the vent holes 11a to 11e is not limited to the illustrated ratio. Further, the shape may be other than a circle. The same applies to the vent holes 12a to 12e. Further, the number of horizontal shelves 13 may be other than four.
Further, the upstream side air chamber 9 may not include the baffle plate 11, and the plurality of horizontal shelves 13 may be locked to the upstream side air chamber 9 by the upstream side shelf receivers 14 a. At this time, compared with the case where the rectifying plate 11 is provided, a parallel flow action by the vent holes 11a to 11e is not achieved, but an action close to this is exhibited by the upstream side shelf receiver 14a. Further, it goes without saying that the rectifying action is also exerted by the horizontal shelf 13. In addition, the intake port 3 and the exhaust port 15 may be provided with an intake fan and an exhaust fan, respectively. Further, the protrusion 13a may have a shape other than a substantially tunnel shape.

  The invention described in claims 1 to 4 can be used as a parallel flow dryer for drying food.

  DESCRIPTION OF SYMBOLS 1 ... Parallel flow dryer 2 ... Heating part 2a, 2b ... Side wall 2c ... Heating part ceiling 3 ... Air supply port 4 ... Electric heater 5 ... Delivery fan 6 ... Air supply port 7 ... Drying room 7a ... Drying room ceiling 7b ... bottom of drying chamber 7c ... central drying chamber 8 ... outlet 9 ... upstream air chamber 10 ... downstream air chamber 9a ... upper air chamber upper surface 10a ... downstream air chamber upper surface 11, 12 ... rectifying plates 11a-11e, 12a -12e ... vent 13 ... horizontal shelf 13a ... projection 13b ... shelf surface 13c ... minute hole 14a ... upstream shelf receiver 14b ... downstream shelf receiver 15 ... exhaust port 16 ... air supply port for circulation 17 ... suction port for circulation 18 ... Front door 18a ... Hinges 19 ... Display panel

Claims (4)

A heating section that warms the air to warm air and a drying chamber disposed below the heating section, and sends the warm air in parallel to the food stored in the drying chamber. A parallel flow dryer that dries and dries this food,
The heating unit is opened on one surface and takes in air from the outside, an electric heater that warms the air taken in from the air supply port to warm air, and sends out the warm air A fan, an air supply port that communicates with the drying chamber and sends the warm air into the drying chamber, and a circulation port that communicates with the drying chamber and sucks the warm air from the drying chamber into the heating unit. A box including an inlet,
The drying chamber includes an upstream air chamber, a downstream air chamber, and a central drying chamber provided between the air chamber, the upstream air chamber, the air outlet that communicates with the air supply port, and the temperature chamber. An upstream side rectifying unit that rectifies the wind in parallel with the food; and an upstream shelf support that supports a plurality of horizontal shelves on which the food is placed, wherein the downstream air chamber is the heating unit A circulation air supply port for circulating the warm air to the heating unit, an exhaust port for exhausting the warm air to the outside, and a downstream rectification unit for rectifying the warm air in parallel with the food And a downstream shelf support that supports the horizontal shelf, wherein the central drying chamber includes the horizontal shelf.   2. The parallel flow dryer according to claim 1, wherein a flow resistance of the downstream rectification unit with respect to the warm air is larger than a flow resistance of the upstream rectification unit with respect to the warm air. The upstream rectification unit and the downstream rectification unit are installed at the boundary between the upstream air chamber and the downstream air chamber and the central drying chamber, respectively, and have a plurality of vent holes (hereinafter referred to as the upstream vent hole and Called downstream vents),
3. The parallel flow dryer according to claim 1, wherein the diameters of the upstream side air hole and the downstream side air hole both increase as they descend from the ceiling portion to the bottom surface portion of the drying chamber. .   The parallel flow dryer according to any one of claims 1 to 3, wherein the plurality of horizontal shelves are provided with a plurality of protrusions on an upper surface thereof.