KR101581457B1 - drying apparatus for uniform drying - Google Patents

Abstract

The present invention relates to a drying apparatus capable of uniformly drying objects. The drying apparatus can uniformly dry objects placed on drying racks by making drying air pass through each of a plurality of drying racks arranged in a drying chamber. The drying apparatus capable of uniformly drying objects includes: a drying chamber which includes a plurality of drying racks on which trays are stacked to be vertically separated from each other and also includes an air inlet and an air outlet; a circulation duct which connects the air inlet to the air outlet; a fan which is installed in the circulation duct and moves in the direction from the air inlet to the air outlet; a heat pump which reduces moisture in air passing through the circulation duct and then heats the air; an external-air and heat exchange unit which exchanges heat of the air, introduced in the circulation duct through the air outlet, with heat of external air; and an air distribution means which is installed in the drying chamber and distributes the air, introduced in the drying chamber through the air inlet, into a plurality of flows toward each drying rack.

Description

A drying apparatus capable of uniform drying (drying apparatus for uniform drying)

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying apparatus capable of drying uniformly, and more particularly, to a drying apparatus capable of uniformly drying an object to be dried placed on a drying basin by passing dry air through each of a plurality of drying bases arranged in the drying chamber.

Generally, agricultural products such as rice, barley harvested in mountain areas, and fish products such as fish caught in fishing villages have a large moisture content, so drying is essential for storage and transportation until reaching consumers.

In other words, various agricultural and marine products are easy to multiply microorganisms and easily corroded. Therefore, in order to improve the preservability of such agricultural and marine products, agricultural and marine products must be dried at a predetermined temperature and for a certain period of time.

As a method of drying a small amount of agricultural and marine products, there is a method in which a drying band formed as a mesh is installed in a certain area, and then various agricultural and marine products are displayed on the installed drying bed and naturally dried with sunlight and wind.

However, the natural drying method not only occupies a large occupied area but also has a very low drying speed, and it is inconvenient to quickly collect agricultural and marine products in case of snow or rain.

As a result, the natural drying method is disadvantageous in that the drying speed, the drying amount, and the dryness of the agricultural and marine products can not be kept constant due to the restriction on the climate conditions, which leads to a decrease in productivity and a decrease in commerciality.

In view of this, in recent years, there has been a tendency to use a dryer capable of rapidly drying a large amount of foodstuffs as a means for drying and transporting or drying foodstuffs for a long period of time.

The dryer is an electric heater or a gas burner type drier, which uses electricity or oil to raise the temperature inside and raise the temperature of the dried material to evaporate moisture to dry. In addition, a method of heating the air by removing the moisture in the air is also applied so as to increase the drying efficiency.

Korean Patent No. 10-1314156 discloses a system for drying agricultural products and a method thereof.

In the agricultural product drying system, dried agricultural products such as cereals, vegetables, fruits, and the like are put into a drying chamber and dry air dehumidified by a dehumidifier for a predetermined time is supplied into the drying chamber to dry agricultural products.

However, as shown in FIG. 1, when a large number of dewatering batches are placed in the drying chamber, high temperature air introduced into the drying chamber sequentially passes through a number of dewatering units, resulting in uneven drying. That is, in the dewatering unit located near the inlet port where the high-temperature air flows, the drying is good, but the temperature of the air gradually decreases while passing through the dewatering unit, and at the same time, the humidity becomes high. It does not dry well. Therefore, conventionally, there is an inconvenience that the position of the dewatering unit must be changed in the middle of the drying process for uniform drying.

Korean Patent No. 10-1314156: Agricultural Product Drying System and Method Thereof

The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a drying method and a drying method in which dried air introduced into a drying chamber is dispersed by a plurality of flows, The present invention has been made in view of the above problems.

In order to accomplish the above object, the present invention provides a drying apparatus capable of drying uniformly, comprising: a drying chamber in which a plurality of drying cords stacked vertically and spaced apart from each other are arranged in the interior, the air inlet and the air outlet being formed; A circulation duct connecting the air inlet and the air outlet; A fan installed inside the circulation duct to move air from the air outlet toward the air inlet; A heat pump for reducing moisture in the air passing through the circulating duct and heating the circulating duct; An outside air heat exchanging unit for exchanging air with air flowing into the circulating duct through the air outlet; And air dispersing means installed in the drying chamber to disperse the air introduced into the drying chamber through the air inlet into a plurality of streams directed toward the drying bases.

The air distribution means includes a dispersion plate formed on the top of each of the drying bases, a wind direction induction plate connected to one side of the dispersion plate and disposed between the drying bases, Respectively.

The airfoil guiding swash plate extends from the distributor plate to the lower portion of the drying bases so as to guide the flow of air in one of the neighboring drying bands.

The heat pump includes an evaporator installed in the circulation duct to remove moisture in the air flowing through the circulation duct, a compressor installed outside the circulation duct to compress the evaporated refrigerant by absorbing the latent heat of evaporation from the evaporator, A condenser installed inside the circulation duct for condensing gaseous refrigerant compressed by the compressor and heating the air passing through the evaporator; and an expansion valve for expanding the refrigerant condensed by the condenser.

The heat pump includes a first branch branch branched from a duct connecting the compressor and the evaporator, a subsidiary condenser connected to the first branch and installed outside the circulation duct, A second branch which branches off from a conduit connecting the condenser and the expansion valve and is connected to the auxiliary condenser; a backflow prevention valve installed in the second branch; and a condenser connected to the expansion valve And a pressure regulating valve that is installed in a conduit for introducing the gas.

And a wind direction adjusting unit installed inside the circulation duct to change a direction of air flow generated by the fan.

The wind direction adjusting unit includes a casing, guide plates disposed in parallel with the casing, a rotation shaft installed on the casing and coupled with the guide plates, an operation bar hinged to one side of the guide plates, And an actuator coupled to the operation bar to move the operation bar to the left and right.

As described above, according to the present invention, the dry air introduced into the drying chamber is dispersed in a plurality of flows, and the flow of each dispersed air is passed through each of the drying bases, so that all the laundry placed on the various drying bases can be uniformly dried.

In addition, the present invention can maintain the temperature of the drying chamber at a constant level by heating the air using the heat generated from the condenser after the high humidity air discharged from the drying chamber is heat-exchanged with the outside air, Can be improved. Especially, in case of the summer when the outdoor temperature is high, the performance of the heat pump can be increased by using the auxiliary condenser.

1 is a schematic view showing the inside of a drying chamber according to a conventional technique,
FIG. 2 is a schematic view showing the construction of a drying apparatus according to an embodiment of the present invention,
FIG. 3 is a schematic view showing the construction of a drying apparatus according to another embodiment of the present invention,
FIG. 4 is a schematic view showing the construction of a drying apparatus according to another embodiment of the present invention,
5 is a cross-sectional view of the wind direction adjuster applied to Fig. 4,
6 is a cross-sectional view of a wind direction adjuster applied to a drying apparatus according to another embodiment of the present invention.

Hereinafter, a drying apparatus capable of drying uniformly according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2, the drying apparatus of the present invention mainly includes a drying chamber 5, a circulating duct 20, a fan 25, a heat pump 30, an outside air heat exchanging unit 50, Respectively.

In the drying chamber 5, a plurality of drying bases 10 are arranged at regular intervals. Each drying cradle 10 has a structure in which the cradles 15 are stacked up and down. The respective laundry 15 is loaded with the laundry to be dried. Agricultural products, aquatic products, and other foods may be applied to the building.

The drying chamber 5 is provided with an air inlet 7 through which dry air flows and an air outlet 9 through which humid air containing moisture evaporated from the drying object flows out.

One end of the circulating duct 20 is connected to the air inlet 7 and the other end of the circulating duct 20 is connected to the air outlet 9. The air for drying the object to be dried is introduced into the air inlet 7 of the drying chamber 5 through the circulating duct 20 and then flows out through the air outlet 9 to be introduced into the circulating duct 20 . The circulating duct 20 may be installed inside the drying chamber 5 or may be installed outside the drying chamber 5.

The fan 25 is installed inside the circulation duct 20 to move air from the air outlet 9 toward the air inlet 7. The fan 25 is located at the front end of the condenser 25 of the heat pump 30 to be described later.

The outdoor heat exchanging unit 50 exchanges heat with the air flowing into the circulating duct 20 through the air outlet 9 with the outside air. The outdoor heat exchanging unit 50 exchanges heat with the air flowing into the circulating duct 20 to cool the air flowing into the circulating duct 20 by a first degree. The air that has been first cooled by heat exchange with the outside air is secondarily cooled through the heat pump 30 and then heated. When the outdoor heat exchanging unit 50 is provided as described above, the dehumidifying effect can be enhanced as compared with the case where the outdoor heat exchanging unit is not provided.

The outside air heat exchanging unit 50 includes a heat exchanger 51 installed inside the circulating duct 20 to be in contact with air passing through the circulating duct 20 and a heat exchanger An outside air inflow pipe 53 connected to one side of the recirculating duct 20, an outside air outflow pipe 55 connected to the other side of the circulating duct 20 and through which the outside air flows through the heat exchanger 51, And an air blower (57) for introducing outside air into the inflow pipe (53).

Although not shown, the heat exchanger 51 is composed of a plurality of heat exchange pipes. The heat exchange pipe is installed to cross the inner flow path of the circulation duct (20). One end of the heat exchange pipe is connected to the outside air inlet pipe 53 and the other end is connected to the outside air outlet pipe 55.

The humid air discharged through the air outlet 9 of the drying chamber 5 comes into contact with the heat exchanger 51 through which the ambient air flows. The humid air in contact with the heat exchanger (51) is heat-exchanged with the cold outside air to be primarily cooled and moved toward the evaporator (31).

The outside air flowing into the outside air inflow pipe 53 is heat-exchanged with the air discharged from the drying room 5 while passing through the heat exchanger 51. The heat-exchanged outside air is discharged to the outside through the outside air outflow pipe (55).

A heat pump (30) is provided to introduce dry air into the drying chamber (5). The heat pump 30 serves to reduce moisture in the air passing through the circulating duct 20 and then to heat it.

The heat pump 30 includes an evaporator 31, a compressor 33 for compressing the evaporated refrigerant by absorbing the latent heat of evaporation from the evaporator 31, a condenser 33 for condensing the gaseous refrigerant compressed by the compressor 33 And an expansion valve 37 installed between the condenser 55 and the evaporator 31 for expanding the refrigerant condensed by the condenser 35. The refrigerant forms a closed circuit refrigeration cycle that is circulated to the evaporator 31, the compressor 33, the condenser 35, the expansion valve 37, and the evaporator 21.

In the present invention, the evaporator (31) and the condenser (35) of the heat pump are installed inside the circulating duct (20). The evaporator 31 is disposed closer to the air outlet 9 of the drying chamber than the condenser 35. Therefore, the air discharged through the air outlet 9 of the drying chamber 5 passes through the evaporator 31 and then through the condenser 35.

The evaporator 31 cools the humid air discharged through the air outlet 9 of the drying chamber to remove moisture in the air. The humid air is cooled and dehumidified while passing through the evaporator 31 to become a saturated air state at a low temperature (5 to 10 ° C).

The condenser (35) passes through the evaporator (31) to heat the dehumidified air. In the present invention, all the heat emitted from the condenser 35 is used to heat the air. The drying air is heated to room temperature or warm temperature (25-35 DEG C) when passing through the condenser (35).

The dry air having passed through the condenser 35 flows into the drying chamber 5 through the air inlet 7 of the drying chamber 5. The dry air introduced into the drying chamber (5) dries the laundry. In this process, moisture is evaporated from the object to be dried, and the evaporated moisture is contained in the air and flows into the circulating duct 20 through the air outlet 9.

The air dispersing means serves to disperse the dry air, which is installed inside the drying chamber (5) and flows into the drying chamber (5) through the air inlet (7), in a plurality of flows. Each of the air flows dispersed by the air distributing means moves toward each of the drying bobbins 10.

The illustrated air distributing means includes a dispersion plate 60 formed on the top of each of the drying bases 10, a wind direction induction plate 63 connected to one side of the dispersion plate 60 and disposed between the drying bases 10, And an air volume regulating plate 67 protruded upward from the other side of the dispersion plate 60.

The dispersing plate 60 is formed on the top of the drying table 10 in a flat plate shape. Since one dispersion plate 60 is provided for each drying stand 10, air moves between the adjacent dispersion plates 60.

The dry air introduced into the drying chamber 5 through the air inlet 7 flows along the upper part of the drying chamber 5 and flows into the space between the dispersion plates 60. The drying air is dispersed in a plurality of flows by the dispersing plate 60 formed on the upper part of the drying racks 10 and flows into the empty space between the drying racks 10.

The airflow guiding swash plate 63 guides the air flow so that the air introduced into the empty space between the drying bases 10 by the dispersion plate 60 can pass through the specific drying base 10.

The wind direction induction swash plate 63 is installed between the two drying hobs 10 arranged in the forward, rearward, left and right directions. The airflow guiding swash plate (63) extends obliquely downward from one side of the dispersion plate (60). The lower portion of the airflow guiding swash plate 63 is connected to the lower portion of the adjacent drying rack. Accordingly, the airflow guiding swash plate 63 can induce a flow of air in the direction of the drying band of any one of two adjacent drying hoods.

Air is passed from one side of the drying rack 10 to the other side direction by the airflow guiding swash plate 63 to remove moisture from the laundry placed on the tray 15. The flow of each dispersed air that has passed through the drying rack 10 merges at the bottom of the drying chamber 5 and moves to the circulating duct 20 through the air outlet 9.

The air volume regulating plate 67 is formed so as to protrude upward from the other side of the dispersion plate 60. The air volume control plate 67 is formed to have a different height depending on the position of the dispersion plate 60. For example, the air amount regulating plate 67 is formed to be gradually higher as it moves in a direction far from the direction near the air inlet 7. The amount of air flowing into the empty space of the drying rack 10 can be uniformly controlled by the air volume regulating plate 67.

The present invention can minimize the uneven drying of the objects placed on various drying bases because the dry air introduced into the drying chamber 5 is dispersed in a plurality of flows and the flow of each dispersed air is passed through each of the drying bases .

A drying apparatus according to another embodiment of the present invention is shown in Fig.

Referring to FIG. 3, the drying apparatus of the present invention shown in FIG. 3 differs from that of FIG. 2 only in the structure of the heat pump. Therefore, the description of the same technical constitution will be omitted.

The heat pump 40 applied to FIG. 3 includes an evaporator 31, a compressor 33 that compresses the evaporated refrigerant by absorbing the latent heat of evaporation from the evaporator 31, and a refrigerant of the vapor phase compressed by the compressor 33 An expansion valve 37 installed between the condenser 55 and the evaporator 31 for expanding the refrigerant condensed by the condenser 35 and an expansion valve 37 disposed between the compressor 33 and the evaporator 35. [ An auxiliary condenser 43 connected to the first branch pipe 41 and installed outside the circulating duct 20 and a second branch pipe 41 connected to the first branch pipe 41, A second branch pipe 44 branched from a pipe connecting the condenser 35 and the expansion valve 37 to be connected to the auxiliary condenser 43 and a second branch pipe 44 connected to the auxiliary condenser 43, And a pressure regulating valve 47 provided in a conduit connecting the condenser 35 and the expansion valve 37. [

The outside air heat exchanging unit 50 serves to heat the air introduced into the circulating duct 20 by exchanging heat with the outside air to primarily cool the air flowing into the circulating duct 20, The heat exchange through the outside air heat exchanging unit 50 is difficult. Therefore, when the temperature of the outside air is higher than the temperature of the drying chamber 5, the present invention stops the operation of the outside air heat exchange unit 50 and performs efficient dehumidification with the heat pump 40 shown in the drawing. However, even in the summer season, when the temperature of the outside air is lower than the temperature of the drying chamber 5, the outside air heat exchange unit 50 can be operated. In winter, since the outside air temperature is lower than the drying room temperature, the outside air heat exchanging unit is mainly operated.

When the temperature of the outside air is higher than the temperature of the drying chamber 5, the opening / closing valve 42 is opened to allow a part of the refrigerant to flow to the evaporator 31 via the auxiliary condenser 43. For convenience of explanation, the condenser 35 installed in the circulating duct 20 is referred to as a main condenser.

On the other hand, even if the auxiliary condenser 43 is not operated during the winter season, since the outside air temperature is very low, the supercooling phenomenon of the refrigerant may occur. In order to prevent such overcooling, a check valve 45 and a pressure regulating valve 47 are used.

The backflow prevention valve 45 prevents the condensation pressure in the main condenser 35 from being lowered and the pressure adjustment valve 47 keeps the condensation pressure in the main condenser 35 constant so that the drying device can be operated stably .

A drying apparatus according to another embodiment of the present invention is shown in Figs. 4 and 5. Fig.

Referring to FIGS. 4 and 5, the drying apparatus of the present invention has a configuration in which a wind direction control unit 70 is provided inside a circulation duct 20. The remaining components other than the wind direction adjuster 70 are the same as those in the embodiment of FIG. 1, so that a detailed description thereof will be omitted.

The wind direction adjuster 70 is for changing the direction of air flow generated by the fan 25. [ 2, the fan 25 may be installed two in the front and rear directions with the wind direction control unit 70 therebetween.

The wind direction adjuster 70 includes a casing 71, guide plates 73 that are disposed in the casing 71 in a large number, fixed shafts (not shown) attached to the casing 71 and coupled to the guide plates 73, 75).

The casing (71) is installed inside the circulating duct (20). The casing (71) is formed in a cylindrical shape with its front and rear opened. A plurality of guide plates (73) are installed inside the casing (71). The guide plates 73 are installed inside the casing 71 by being engaged with the fixed shaft 75, respectively. The guide plates 73 are inclined in different directions with respect to the guide plate 73 located at the center so that air can be diffused.

Another example of the wind direction adjusting portion is shown in Fig. 5 has a structure in which the guide plate is fixed, but the guide plate of the wind direction adjusting unit shown in FIG. 6 is rotatable in the left and right direction.

6, the wind direction adjuster 80 includes a casing 81, guide plates 83 arranged in parallel in the casing 81, guide plates 83 installed on the casing 81, An operation bar 87 hinged to one side of the guide plates 83 and an actuator 89 coupled to the operation bar 87 to move the operation bar to the left and right, Respectively.

Guide plates 83 provided inside the casing 81 are coupled by a rotation shaft 85 and are rotatable. The actuator 89 is installed on one side of the casing 81. As the actuator 89, a swing motor and a solenoid valve may be used. When the actuator 89 is operated, the operation bar 87 connected to the actuator 89 moves left and right. As a result, the guide plate 83 rotates in the left-right direction.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention. . Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

5: drying chamber 7: air inlet
9: air outlet 10:
20: Circular duct 25: Fan
30: Heat pump 31: Evaporator
35: condenser 50: outdoor heat exchange unit
60: Dispersion plate 63: Wind direction induction swash plate
67: Air volume control plate

Claims (7)

delete A drying chamber in which a plurality of drying cords stacked vertically and spaced apart from each other are arranged in the interior, the air inlet and the air outlet being formed;
A circulation duct connecting the air inlet and the air outlet;
A fan installed inside the circulation duct to move air from the air outlet toward the air inlet;
A heat pump for reducing moisture in the air passing through the circulating duct and heating the circulating duct;
An outside air heat exchanging unit for exchanging air with air flowing into the circulating duct through the air outlet;
And air distributing means installed in the drying chamber for dispersing the air flowing into the drying chamber through the air inlet into a plurality of flows toward each of the drying bases,
The heat pump includes an evaporator installed inside the circulation duct to remove moisture in the air flowing through the circulation duct, a compressor for compressing the evaporated refrigerant by absorbing the latent heat of evaporation from the evaporator, A condenser for condensing the gaseous refrigerant compressed by the compressor and heating the air passing through the evaporator; and an expansion valve for expanding the refrigerant condensed by the condenser,
The air distribution means includes a dispersion plate formed on the top of each of the drying bases, a wind direction induction swash plate connected to one side of the dispersion plate and disposed between the drying bases, And a drying unit for drying the substrate. 3. The air conditioner according to claim 2, wherein the air-direction-inducing swash plate is formed so as to extend from the distributor plate to the lower portion of the drying bases so as to induce a flow of air in the direction of one of the adjacent air- Lt; / RTI > delete A drying chamber in which a plurality of drying cords stacked vertically and spaced apart from each other are arranged in the interior, the air inlet and the air outlet being formed;
A circulation duct connecting the air inlet and the air outlet;
A fan installed inside the circulation duct to move air from the air outlet toward the air inlet;
A heat pump for reducing moisture in the air passing through the circulating duct and heating the circulating duct;
An outside air heat exchanging unit for exchanging air with air flowing into the circulating duct through the air outlet;
And air distributing means installed in the drying chamber for dispersing the air flowing into the drying chamber through the air inlet into a plurality of flows toward each of the drying bases,
The heat pump includes an evaporator installed inside the circulation duct to remove moisture in the air flowing through the circulation duct, a compressor for compressing the evaporated refrigerant by absorbing the latent heat of evaporation from the evaporator, A condenser for condensing the gaseous refrigerant compressed by the compressor and heating the air passing through the evaporator; and an expansion valve for expanding the refrigerant condensed by the condenser,
The heat pump includes a first branch branch branched from a duct connecting the compressor and the evaporator, a subsidiary condenser connected to the first branch and installed outside the circulation duct, A second branch which branches off from a conduit connecting the condenser and the expansion valve and is connected to the auxiliary condenser; a backflow prevention valve installed in the second branch; and a condenser connected to the expansion valve Further comprising a pressure regulating valve installed in a conduit which is connected to the drying device. delete A drying chamber in which a plurality of drying cords stacked vertically and spaced apart from each other are arranged in the interior, the air inlet and the air outlet being formed;
A circulation duct connecting the air inlet and the air outlet;
A fan installed inside the circulation duct to move air from the air outlet toward the air inlet;
A heat pump for reducing moisture in the air passing through the circulating duct and heating the circulating duct;
An outside air heat exchanging unit for exchanging air with air flowing into the circulating duct through the air outlet;
And air distributing means installed in the drying chamber for dispersing the air flowing into the drying chamber through the air inlet into a plurality of flows toward each of the drying bases,
The heat pump includes an evaporator installed inside the circulation duct to remove moisture in the air flowing through the circulation duct, a compressor for compressing the evaporated refrigerant by absorbing the latent heat of evaporation from the evaporator, A condenser for condensing the gaseous refrigerant compressed by the compressor and heating the air passing through the evaporator; and an expansion valve for expanding the refrigerant condensed by the condenser,
Further comprising a wind direction adjusting unit installed inside the circulation duct to change a direction of air flow generated by the fan,
The wind direction adjusting unit includes a casing, guide plates disposed in parallel with the casing, a rotation shaft installed on the casing and coupled with the guide plates, an operation bar hinged to one side of the guide plates, And an actuator connected to the operating bar to move the operating bar in the left and right direction.

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