KR102397995B1 - Wood drying device - Google Patents

Abstract

The present invention discloses a wood drying device capable of drying a wood by evenly transferring heat to throughout the wood with a simple structure; effectively discharging moisture discharged from the wood when drying the wood; and accelerating release of the moisture from the dried wood. The wood drying device using an uneven metal plate comprises: the uneven metal plate; and a heating cable. The uneven metal plate is interposed between woods which are vertically laminated to form a space unit between the adjacent woods which are vertically laminated, alternately forms a plurality of mountain units and valley units to discharge the moisture discharged from the wood through the mountain units or the valley units, and transfers heat generated from the heating cable to air and the wood. The heating cable is touched to the uneven metal plate, and is heated with applied power. When applying the power to the heating cable, the present invention dries the wood by radiant heat from the heating cable, conduction heat from the uneven metal plate, and convection heat through the air heated by the heating cable and the uneven metal plate.

Description

Wood drying device {WOOD DRYING DEVICE}

The present invention relates to a wood drying apparatus, and more particularly, to a wood drying apparatus capable of drying wood by evaporating moisture from the wood by using a concave-convex metal plate and a heating cable composite as a plate-shaped heating element.

In general, wood has a relatively high moisture content during logging, so if you use the felled wood as it is without drying it to make a product, the product will be deformed as the wood dries over time. A drying process is required to evaporate moisture before using it to make it.

Drying methods for such wood include natural drying and heat drying. The natural drying method is a method of stacking wood in a drying field and drying it using the air temperature, humidity and wind. It costs less and the operation is relatively simple. However, the drying time is long and a large drying area is required. There are unavoidable drawbacks. On the other hand, the heat drying method is a method of drying by artificially controlling drying conditions such as temperature, humidity and wind speed of the drying chamber, and has the advantage of relatively short drying time and drying below the air-dry moisture content.

Here, the apparatus used in the heating and drying method includes an apparatus for heating internal air by directly installing an electric heater in a drying chamber, an apparatus for injecting heated air into the drying chamber through a hot air blower that obtains heat from the combustion apparatus, and a combustion apparatus. There are a device for indirectly heating the air in the drying chamber by injecting it into the drying chamber after heating the heating medium, a device for injecting superheated steam into the drying chamber, and a high-frequency vacuum drying device for drying wood in the vacuum chamber with a high-temperature metal plate.

However, the heating and drying method as described above requires excessive equipment purchase and installation costs, and high-power high-frequency must be generated while the drying chamber is maintained in a vacuum. There is a problem that excessive operating costs must be input because of the low efficiency of converting electrical energy into thermal energy through a high-frequency generator.

Therefore, recently, as disclosed in Republic of Korea Patent Publication No. 10-20622351 (registration date December 27, 2019), "a movable wood drying apparatus and drying method having a planar heating element" has been developed.

The wood drying device using such a conventional general planar heating element as a heating means can minimize the surface splitting phenomenon in which the surface is cracked because the wood is dried from the inside, and high energy efficiency can be obtained as well as inexpensive equipment purchase and installation costs. In addition, it has the advantage that it can be manufactured with inexpensive materials and can be manufactured at a light weight.

However, in the wood drying apparatus using a conventional general planar heating element as a heating means, the temperature is not uniform throughout the planar heating element, and when the temperature rises locally in a part of the planar heating element, there is a risk of fire. , there was a problem that the moisture discharged from the wood could not be effectively discharged because the planar heating element and the wood were in continuous contact.

Republic of Korea Patent Publication No. 10-2062351 (2019.12.27.) Republic of Korea Patent Publication No. 10-1342973 (2013.12.12.) Republic of Korea Patent Publication No. 10-1430031 (2014.08.07.) Republic of Korea Patent Publication No. 10-1434472 (2014.08.20.)

Accordingly, it is an object of the present invention to provide a wood drying apparatus capable of drying wood by evenly transferring heat to the entire wood with a very simple structure.

Another object of the present invention is to provide a wood drying apparatus that prevents distortion even in the drying process of wood by uniformly applying a load to the wood surface during wood drying.

Another object of the present invention is to provide a wood drying apparatus capable of effectively discharging moisture discharged from wood during drying of wood.

Another object of the present invention is to provide a wood drying apparatus capable of accelerating the discharge of moisture from the wood to be dried.

In order to achieve the above object, the wood drying apparatus according to the present invention is interposed between the wood stacked up and down so that a space portion is formed between the wood adjacent to each other stacked up and down, and the moisture discharged from the wood is discharged through the mountains or valleys. A concave-convex metal plate that transfers the heat generated from the heating cable to air and wood while a plurality of mountains and valleys are alternately formed to be able to do so; and a heating cable installed in contact with the concave-convex metal plate to generate heat as power is applied. The concave-convex metal plate may have an upper portion of a ridge and a lower portion of a trough so as to secure a wide contact area with neighboring wood stacked up and down.

Wood drying apparatus according to the present invention includes a temperature sensor for detecting the heating temperature of the heating cable as power is applied to the heating cable; and a control unit capable of adjusting the temperature of the heating cable by comparing the heating temperature of the heating cable sensed by the temperature sensor with a preset reference temperature.

The wood drying apparatus according to the present invention may include a housing for forming a drying chamber for accommodating the vertically stacked wood therein. The housing includes: a bottom plate installed on the base frame and on which wood stacked up and down is placed; a pair of walls installed on both sides of the base frame; A support member positioned between the pair of walls and provided with a plurality of support members at predetermined intervals on the base frame: It may include a sealing member that allows the generated water vapor to condense into water and flow down to the lower part. In addition, the housing according to the present invention may further include a drip tray for discharging water that is condensed on the inner surface of the sealing member and flows downward along the inside of the sealing member to the outside of the drying chamber.

In the wood drying apparatus according to the present invention, in order to reduce heat loss, it is preferable that the bottom plate and the pair of walls are formed of a material having excellent thermal insulation performance.

And in the wood drying apparatus according to the present invention, the humid air inside the drying chamber is discharged to the outside of the drying chamber, and the relatively dry air outside the drying chamber exchanges heat with the humid air discharged from the inside of the drying chamber to the outside. It may further include a heat recovery ventilation means to be introduced into the drying chamber while being.

As described above, in the wood drying apparatus according to an embodiment of the present invention, the adjacent wood is spaced apart from each other by a predetermined distance so that a concave-convex metal plate is interposed between the adjacent wood stacked up and down to form a space between the wood adjacent to each other. to be able to support it.

In addition, while the adjacent wood is supported by the concave-convex metal plate in a state spaced apart from each other by a predetermined distance, the heating cable installed in contact with the concave-convex metal plate generates heat through the space between the adjacent wood formed by the ridges and valleys of the concave-convex metal plate. This allows the heated air to be delivered to the wood.

In addition, the wood portion in close contact with the peaks and valleys of the concave-convex metal plate to which the air heated to the high temperature is not delivered is heated by the heat conducted from the heating cable to the concave-convex metal plate.

In addition, since radiant heat is generated from the heating cable and the concave-convex metal plate that has received heat from the heating cable, drying of the wood is promoted.

Therefore, the wood drying apparatus according to an embodiment of the present invention not only allows heat to be uniformly transmitted to the entire wood stacked up and down, but also raises the temperature of the air in the drying chamber to significantly improve wood drying efficiency. can have an effect.

In addition, the wood drying apparatus according to an embodiment of the present invention is used as a discharge passage for moisture discharged from the wood as the wood is heated as the peaks and valleys of the uneven metal plate interposed between the adjacent wood stacked up and down. It has the effect of effectively discharging the moisture discharged from the wood during drying of the wood.

On the other hand, the wood drying apparatus according to an embodiment of the present invention detects the heating temperature of each heating cable by a temperature sensor, and the temperature of each heating cable according to the heating temperature of the heating cable detected by the temperature detection sensor It has the effect of drying the whole wood to be dried at a uniform temperature by allowing it to be controlled.

In addition, when it is determined by the humidity sensor that the humidity of the air in the drying chamber is higher than the reference humidity, the wood drying apparatus according to an embodiment of the present invention operates the heat recovery ventilation means through the control unit to change the temperature of the air in the drying chamber Since the humidity in the drying chamber can be lowered without the need for drying, there is an effect of accelerating the discharge of moisture from the wood being dried, thereby greatly improving the wood drying efficiency and energy efficiency.

Ultimately, the wood drying apparatus according to an embodiment of the present invention can provide a wood drying apparatus with a very simple structure, which is easy to manufacture and inexpensive, and can provide good quality wood, and the wood drying efficiency is Of course, energy efficiency can also be significantly improved, so it has the effect of improving customer satisfaction and product reliability by minimizing the burden of equipment and operating costs.

Other effects of the present invention will be clearly understood and understood by an expert or researcher in the art through the specific details described below or during the course of carrying out the present invention.

1 is a view for explaining a heating means applied to a wood drying apparatus according to an embodiment of the present invention;
2 is a view showing a state in which a heating means is interposed between adjacent wood stacked up and down;
3 is an exploded perspective view illustrating a housing of a wood drying apparatus according to an embodiment of the present invention;
4 is a block diagram illustrating an apparatus for drying wood according to an embodiment of the present invention;

Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification is present, and includes one or more other features or It should be understood that the existence or addition of numbers, steps, operations, components, parts, or combinations thereof does not preclude the possibility of addition.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

With reference to the drawings below, preferred embodiments of the present invention will be described in more detail.

1 is a view for explaining a plate-shaped heating means applied to a wood drying apparatus according to an embodiment of the present invention, FIG. 2 is a view showing a state in which the heating means is interposed between adjacent wood stacked up and down 3 is an exploded perspective view illustrating a housing of a wood drying apparatus according to an embodiment of the present invention, and FIG. 4 is a block diagram illustrating a wood drying apparatus according to an embodiment of the present invention.

1 to 4 , the wood drying apparatus according to an embodiment of the present invention may include at least one plate-shaped heating means 110 .

The heating means 110 generates heat while supporting the adjacent wood W at a predetermined distance so that a space S is formed between the adjacent wood W stacked up and down to generate heat. Between the adjacent wood (W) stacked up and down to dry the wood (W) by transferring equal heat through heat transfer through the high-temperature air heated to the wood (W) and direct heat transfer through conduction may be interposed.

For example, the heating means 110 may include a concave-convex metal plate 111 and a heating cable 112 .

The concave-convex metal plate 111 may be bent such that a plurality of peaks 111a and valleys 111b are alternately formed.

Here, the concave-convex metal plate 111 is preferably made of a metal such as steel, copper, stainless steel, or aluminum having high rigidity and good thermal conductivity.

Such an uneven metal plate 111 may be interposed between the vertically stacked wood W to support the vertically stacked wood W in a state spaced apart by a predetermined distance, and the uneven metal plate 111 is A space portion S may be formed between the wood W stacked up and down as interposed between the wood W stacked with .

On the other hand, as power is applied to the heating cable 112 and the wood W is heated, the moisture that escapes from the wood W is discharged through the mountain portion 111a or the valley portion 111b of the concave-convex metal plate 111. can

Here, the upper and lower portions of the peaks 111a and the valleys 111b of the concave-convex metal plate 111 in contact with the adjacent wood W stacked up and down to secure a wide contact area with the wood W It is preferable to be flat as well as to be in close contact with the wood (W) to improve thermal conductivity.

For example, it is preferable that the cross-section of the peaks 111a and the valleys 111b of the concave-convex metal plate 111 is formed in a trapezoidal shape.

The heating cable 112 is installed in the valley portion 111b of the concave-convex metal plate 111 to generate heat as power is applied to transfer heat to the concave-convex metal plate, and also to heat the air by the heating cable and the uneven metal plate to heat wood. dry the

Here, since the heating cable 112 has to conduct heat to the uneven metal plate 111 , it is preferable to be installed in a state in contact with the uneven metal plate 111 . The heating cable 112 may be fixed by a fixing bracket 113 so as to sequentially and continuously pass through the valleys 111b formed in the concave-convex metal plate 111 and contact them, and both ends of the heating cable 112 have power and A waterproof connector 112a may be provided to exclude the influence of moisture generated during drying of wood while connecting.

In addition, the heating means 110 may further include a temperature sensor 114 and a control unit 115 as shown in FIG. 3 or 4 .

The temperature sensor 114 may detect the heating temperature of the heating cable 112 as power is applied to the heating cable 112 .

The control unit 115 compares the heating temperature of the heating cable 112 sensed by the temperature sensor 114 with a preset reference temperature to adjust the temperature of the heating cable 112 .

For example, if the control unit 115 determines that the heating temperature of the heating cable 112 sensed by the temperature sensor 114 is higher than a preset reference temperature, the heating temperature of the heating cable 112 is low. The heating temperature of the heating cable 112 is controlled so that the It is possible to control the heating temperature of the heating cable 112 to increase the heating temperature.

In addition, the wood drying apparatus 100 according to an embodiment of the present invention further includes a housing 120 .

A drying chamber is formed in the housing 120 to accommodate the heating means 110 interposed between the vertically stacked wood W and the adjacent wood.

For example, the housing 120 may include a bottom plate 121 , a wall 122 , a sealing member 123 , and a support member 124 .

The bottom plate 121 may be installed on the base frame (F). On the other hand, on the upper portion of the bottom plate 121, the wood (W) to be dried stacked up and down with the heat generating means 110 interposed therebetween may be placed.

The wall 122 may be installed on both sides of the base frame F so as to be positioned on both sides of the insulated bottom plate 121 .

It is preferable that the bottom plate and the pair of walls are formed of a material having excellent thermal insulation performance.

The sealing member 123 may be connected to the bottom plate 121 and a pair of walls 122 to enclose and seal the wood (W) to be dried stacked with the heating means 110 interposed therebetween. there is.

Such a sealing member 123 allows the heat generating means 110 to be operated to condense water vapor generated from the wood into water as the temperature in the drying chamber formed by the housing 120 rises.

For example, the sealing member 123 may be a vinyl or tent.

A plurality of the support members 124 are detachably installed at predetermined intervals on the base frame F so as to be positioned between the pair of walls 122 to support the sealing member 123 .

On the other hand, the support member 124 is manufactured as a unit module, so that it can be used by connecting the length according to the required length.

For example, the support member 124 is preferably made of a zinc pipe that has been externally insulated.

In addition, the housing 120 may further include a drip tray 125 .

The drip tray 125 is disposed at both lower ends of the sealing member 123 so that moisture discharged as the wood W is heated by the heat generating means 110 is condensed on the inner surface of the sealing member 123 . to receive the water flowing down along the sealing member 123 and discharge it to the outside of the drying chamber.

In addition, the wood drying apparatus 100 according to an embodiment of the present invention may further include a humidity sensor 130 and a heat recovery ventilation means 140 .

The humidity sensor 130 measures the humidity inside the drying chamber and transmits it to the control unit 114 of the heating means 110 .

When the heat recovery ventilation means 140 determines that the humidity inside the drying chamber measured from the humidity sensor through the control unit 114 is higher than the preset reference humidity, the humid air inside the drying chamber is discharged to the outside of the drying chamber. to be discharged, and the dry air outside the drying chamber may be operated by the control unit 114 to be introduced into the drying chamber while heat exchanged with the humid air discharged from the inside of the drying chamber to the outside.

Again, a process of drying wood using a wood drying apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4 .

1 to 4, in order to dry the wood (W) using the wood drying apparatus 100 using the concave-convex metal plate according to an embodiment of the present invention, the adjacent wood (W) stacked up and down A plurality of wood (W) is stacked up and down while interposing the heating means (110) to form a space (S) therebetween.

As described above, a plurality of wood (W) to be dried is stacked up and down while the heating means (110) is interposed so that a space (S) is formed between the adjacent wood (W) stacked up and down, and then a heating cable ( 112) is applied to operate the heating cable 112.

As power is applied to the heating cable 112 and operated, the heating cable 112 generates heat, and as the heating cable 112 generates heat, the concave-convex metal plate 111 interposed between the adjacent wood W stacked up and down. ) through the space (S) between the wood (W) formed by the plurality of peaks (111a) and the valleys (111b) of the wood (W) is evenly transmitted to the upper and lower surfaces of the adjacent to each other (W).

In addition, adjacent wood ( The upper and lower surfaces of W) are heated by the concave-convex metal plate 111 as heat is conducted to the concave-convex metal plate 111 in contact with the heating cable 112 as the heating cable 112 generates heat. Heat can be evenly and evenly transmitted to the entire upper and lower surfaces of the wood (W) adjacent to each other that is transferred and stacked in the upper and lower portions, and the temperature of the air in the drying chamber 120 can be uniformly raised.

In addition, the drying of the wood can be accelerated even by the radiant heat generated by the heating cable 112 and the concave-convex metal plate 111 .

On the other hand, the moisture discharged as the heating cable 112 is operated and the wood W is heated is the mountain portion 111a of the concave-convex metal plate 111 interposed between the adjacent wood W stacked up and down and To be effectively discharged to the outside of the wood (W) along the valley (111b).

That is, the peaks 111a and valleys 111b of the concave-convex metal plate 111 interposed between the adjacent woods W stacked in the upper and lower portions are the moisture discharged from the wood W when the wood W is dried. Make it easy to secure an exhaust passage.

In addition, when power is applied to the heating cable 112 and heat is applied to the wood W and moisture is discharged from the wood W, the moisture contained in the air in the drying chamber is condensed on the inner surface of the sealing member 123 . do.

Moisture condensed on the inner surface of the sealing member 123 flows down along the sealing member 123 , is collected in the drip tray 125 , and then is discharged to the outside of the drying chamber along the drip tray 125 .

At this time, the temperature sensor 114 detects the heating temperature of the heating cable 112 of each heating means 110 interposed between the adjacent wood W stacked up and down and transmits it to the control unit 115 . The control unit 115 compares the heating temperature of the heating cable 112 with a preset reference temperature, and when it is determined that the heating temperature of the heating cable 112 is higher than the reference temperature, the heating temperature of the heating cable 112 to control the temperature of the heating cable 112 to increase the heating temperature of the heating cable 112 to the reference temperature when it is determined that the heating temperature of the heating cable 112 is lower than the reference temperature. do.

In addition, the humidity sensor 130 detects the air humidity in the drying chamber and transmits it to the control unit 115 . The humidity of the air in the drying chamber sensed by the humidity sensor 130 transmitted to the control unit 115 is When it is determined that the humidity is higher than the preset reference humidity, the control unit 115 operates the heat recovery ventilation means 140 so that the humid air inside the drying chamber is discharged to the outside of the drying chamber, and the dry air outside the drying chamber is removed from the drying chamber. let it flow inside.

At this time, the dry air outside the drying chamber is allowed to flow into the drying chamber while exchanging heat with the humid air discharged from the inside of the drying chamber to the outside through the heat recovery ventilation means 140 to minimize heat loss. .

That is, since the wood drying apparatus 100 according to an embodiment of the present invention can lower the humidity in the drying chamber without changing the air temperature in the drying chamber, the moisture discharge from the wood W to be dried is accelerated and the wood (W) It can greatly improve the drying efficiency.

In more detail, when heat is generated through the heating cable 112 and the inside of the drying chamber becomes in a high temperature state, moisture escapes from the wood W and the humidity of the air inside the drying chamber increases.

When the humidity of the air inside the drying chamber increases, moisture condenses on the inner surface of the sealing member of the drying chamber to form water droplets, and the water drops fall along the sealing member 123 and the water is discharged to the outside of the drying chamber through the drip tray. When moisture is discharged only by condensation, it takes a lot of time to lower the humidity, and as the humidity of the air inside the drying chamber becomes saturated, the moisture discharge from the wood W is reduced, so it takes a lot of time to dry the wood W.

Therefore, in the wood drying apparatus 100 according to an embodiment of the present invention, the heat recovery ventilation means 140 is operated by the control unit 115 according to the humidity of the air inside the drying chamber detected by the humidity sensor 130 . As a result, the humid air in the drying chamber is discharged to the outside of the drying chamber and the dry air outside the drying chamber is introduced into the drying chamber to lower the humidity in the drying chamber to accelerate the moisture discharge from the wood (W) being dried. W) It can improve drying efficiency.

In addition, since the dry air outside the drying chamber flows into the drying chamber while exchanging heat with the high-humidity air discharged to the outside through the heat recovery ventilation means 140 , the air temperature in the drying chamber does not change. Energy efficiency can be improved because the humidity inside can be lowered.

And in the wood drying apparatus according to the present invention, since the plate-shaped concave-convex metal plate is interposed between the wood stacked up and down, the load is uniformly transmitted to the wood, thereby effectively suppressing distortion that may occur during the drying process of the wood. .

In the foregoing detailed description of the present invention, although it has been described with reference to preferred embodiments of the present invention, those skilled in the art or those having ordinary knowledge in the art will have the spirit of the present invention described in the claims to be described later. And it will be understood that various modifications and variations of the present invention can be made without departing from the technical scope.

(110): heating means (111): concave-convex metal plate
(112): heating cable (114): temperature sensor
(115): control unit (120): housing
(121): bottom plate (122): wall
(123): sealing member (124): support member
(125): drip tray (130): humidity sensor
(140): heat recovery ventilation means

Claims (8)

It is interposed between the wood stacked up and down so that a space is formed between the adjacent wood stacked up and down so that moisture discharged from the wood can be discharged through the mountains or valleys. Concave-convex metal plate that transfers heat generated from the cable to air and wood;
a heating cable installed in contact with the concave-convex metal plate to generate heat as power is applied; and
A wood drying device including a waterproof connector provided at both ends of the heating cable to exclude the influence of moisture while connecting to a power source. According to claim 1,
The concave-convex metal plate,
Wood drying apparatus, characterized in that the upper part of the ridge and the lower part of the valley part are formed flat to secure a wide contact area with neighboring wood stacked up and down. According to claim 1,
a temperature sensor for detecting a heating temperature of the heating cable as power is applied to the heating cable; and
The wood drying apparatus further comprising a controller capable of adjusting the temperature of the heating cable by comparing the heating temperature of the heating cable sensed by the temperature sensor with a preset reference temperature. According to claim 1,
and a housing for forming a drying chamber accommodating the vertically stacked wood therein. 5. The method of claim 4,
The housing is
a bottom plate installed on the base frame and on which wood stacked up and down is placed;
a pair of walls installed on both sides of the base frame;
A support member positioned between the pair of walls and installed in a plurality of the base frame at predetermined intervals; And
A wood drying apparatus comprising a sealing member for enclosing and sealing the bottom plate, a pair of walls, and a plurality of support members, and allowing water vapor generated from wood to condense into water as the temperature rises in the drying chamber and to flow downward. 6. The method of claim 5,
The housing is
Wood drying apparatus further comprising a drip tray for discharging water that is condensed on the inner surface of the sealing member and flows downward along the inside of the sealing member to the outside of the drying chamber. 6. The method of claim 5,
Wood drying apparatus, characterized in that the bottom plate and the pair of walls are formed of a material having excellent thermal insulation performance. 6. The method of claim 5,
The humid air inside the drying chamber is discharged to the outside of the drying chamber, and the relatively dry air outside the drying chamber is heat exchanged with the humid air discharged from the inside of the drying chamber to the outside. Heat to flow into the drying chamber Wood drying device further comprising a recovery ventilation means.

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