KR101638604B1 - drying apparatus of indirect heating type using heat pump - Google Patents

drying apparatus of indirect heating type using heat pump Download PDF

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Publication number
KR101638604B1
KR101638604B1 KR1020150164309A KR20150164309A KR101638604B1 KR 101638604 B1 KR101638604 B1 KR 101638604B1 KR 1020150164309 A KR1020150164309 A KR 1020150164309A KR 20150164309 A KR20150164309 A KR 20150164309A KR 101638604 B1 KR101638604 B1 KR 101638604B1
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KR
South Korea
Prior art keywords
air
drying
main condenser
condenser
drying chamber
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KR1020150164309A
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Korean (ko)
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최광일
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(주)에네스이엔지
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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B7/00—Preservation or chemical ripening of fruit or vegetables
    • A23B7/02—Dehydrating; Subsequent reconstitution
    • A23B7/0205—Dehydrating; Subsequent reconstitution by contact of the material with fluids, e.g. drying gas or extracting liquids
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B4/00—General methods for preserving meat, sausages, fish or fish products
    • A23B4/03—Drying; Subsequent reconstitution
    • A23B4/031—Apparatus for drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/001—Heating arrangements using waste heat
    • F26B23/002—Heating arrangements using waste heat recovered from dryer exhaust gases
    • F26B23/004—Heating arrangements using waste heat recovered from dryer exhaust gases by compressing and condensing vapour in exhaust gases, i.e. using an open cycle heat pump system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/14—Chambers, containers, receptacles of simple construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06—Chambers, containers, or receptacles
    • F26B25/14—Chambers, containers, receptacles of simple construction
    • F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2300/00—Processes
    • A23V2300/10—Drying, dehydrating

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sustainable Development (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The present invention relates to an indirect heating-type drying apparatus using heat pumps, and more specifically, to a drying apparatus which heats a drying chamber indirectly through a heat-exchange between the air inside the drying chamber and a high temperature heating medium, and induces drying air streams to pass through each of a plurality of drying racks disposed inside the drying chamber so that the object being dried can be dried uniformly and thoroughly. The indirect heating-type drying apparatus using heat pumps of the present invention comprises: a plurality of drying racks in which sieve members are vertically spaced apart and stacked on each another; a drying chamber which includes an air inlet and an air outlet; a circulation duct which connects the air inlet and the air outlet; a fan which is installed inside the circulation duct and transports air from the air outlet toward the air outlet; a heat pump which reduces the moisture in air passing through the circulation duct and then heats the air; and an air diffusing means which is installed inside the drying chamber and diffuses the air being introduced from the air inlet into a plurality of air streams flowing towards each of the drying racks.

Description

[0001] The present invention relates to an indirect heating type drying apparatus using a heat pump,

The present invention relates to an indirect heating type drying apparatus using a heat pump, and more particularly, to an apparatus and a method for indirectly heating a drying apparatus using a heat pump, To a drying device capable of uniformly drying a drying object placed on a drying stand.

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 method of heating a drying chamber by indirectly heating a drying chamber by exchanging the air with a hot heating medium, And to provide a drying apparatus in which the laundry can be uniformly dried by passing the flow through each of the drying bases.

In order to accomplish the above object, an indirect heating type drying apparatus using a heat pump according to the present invention comprises: a drying chamber in which a plurality of drying cords stacked vertically and spaced apart from each other are arranged in an interior, and an air inlet and an air outlet are 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; 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 heat pump includes an evaporator installed inside the circulation duct to remove moisture in the air flowing through the circulation duct, a compressor that compresses the evaporated refrigerant by absorbing the latent heat of evaporation from the evaporator, A main 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 main condenser, wherein the heat pump is connected to the compressor and the evaporator An auxiliary condenser connected to the first branch and installed on the outside of the circulation duct, an opening / closing valve installed on the first branch, a second condenser connected to the main condenser, A second branch branch branched from a pipeline connecting the expansion valve and connected to the auxiliary condenser; And a pressure regulating valve provided in a conduit connecting the main condenser and the expansion valve.

The main condenser includes a first main condenser connected to the compressor and through which the refrigerant passed through the compressor flows, a second main condenser connected to the first main condenser and through which the refrigerant passed through the first main condenser flows, And a third main condenser connected to the second main condenser and through which the refrigerant passed through the second main condenser flows, wherein air passing through the evaporator is supplied to the third main condenser, the second main condenser, The third main condenser, the second main condenser, and the first main condenser are sequentially spaced apart from each other along the direction in which air flows in the circulation duct so as to be heated step by step while passing through the main condenser.

And an outside air heat exchanging unit for exchanging the air flowing into the circulating duct through the air outlet with the outside air.

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, 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.

As described above, the present invention provides a drying apparatus for drying an object to be dried by an indirect heating method by exchanging the air in a drying chamber with a high-temperature heating medium operated by a heat pump.

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 heat of the humid air discharged from the drying chamber is exchanged with the outside air and then cooled by the evaporator of the heat pump, And the drying efficiency 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.

Further, in the present invention, by providing a plurality of condensers in a multi-stage in a circulating duct through which air flowing into the drying chamber flows, the temperature of the air can be gradually increased by heating the air by low temperature, middle temperature and high temperature.

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,
4 is a cross-sectional view of the wind direction adjusting portion applied to Fig. 3,
5 is a cross-sectional view of a wind direction adjuster applied to a drying apparatus according to another embodiment of the present invention.

Hereinafter, an indirect heating type drying apparatus using a heat pump according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 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, and an air dispersing means.

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.

An outside air heat exchanging unit 50 may be provided for exchanging the air introduced into the circulating duct 20 with the outside air to thereby primarily cool the air flowing into the circulating duct 20. [

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 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 refrigerant evaporated by absorbing the latent heat of evaporation from the evaporator 31, a main condenser 33 for condensing the gaseous refrigerant compressed by the compressor 33, An expansion valve 39 installed between the main condenser 35 and the evaporator 31 for expanding the refrigerant condensed by the main condenser 35 and an evaporator 35 for expanding the refrigerant condensed by the main condenser 35, A auxiliary condenser 43 connected to the first branch pipe 41 and provided outside the circulating duct 20 and a second auxiliary pipe 41 connected to the first branch pipe 41, A second branch pipe 44 branched from a pipe connecting the main condenser 35 and the expansion valve 39 and 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 for connecting the main condenser 35 and the expansion valve 39 to each other.

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 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.

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 .

In the present invention, a plurality of main condensers 35 are provided. The main condenser 35 is connected to the compressor 33 and is connected to the first main condenser 36 through which the refrigerant passed through the compressor 33 flows and the first main condenser 36 connected to the first main condenser 36, And a third main condenser 38 connected to the second main condenser 37 to receive the refrigerant passed through the second main condenser 37. The second main condenser 37 is connected to the second main condenser 37,

The third main condenser 38, the second main condenser 37 and the first main condenser 36 are sequentially disposed in the circulating duct 20 along the direction in which the air flows in the circulating duct 20. Thus, the air having passed through the evaporator 31 first passes through the third main condenser 38, and then passes through the second main condenser 37 and the first main condenser 36 in order.

The air having passed through the evaporator 31 passes through the third main condenser 38, the second main condenser 37 and the first main condenser 36 in this order and is gradually raised in temperature to low temperature, middle temperature and high temperature .

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 Figs. 3 and 4. Fig.

3 and 4, the drying apparatus of the present invention has a structure in which a wind direction adjusting 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. 4 has a structure in which the guide plate is fixed, but the guide plate of the wind direction adjustment unit shown in FIG. 5 is rotatable in the left and right direction.

5, the wind direction adjuster 80 includes a casing 81, guide plates 83 arranged in parallel within 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: main condenser 50: outdoor heat exchange unit
60: Dispersion plate 63: Wind direction induction swash plate
67: Air volume control plate

Claims (6)

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;
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 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, Wherein the heat pump is provided with a heater for heating the substrate. [2] The compressor according to claim 1, wherein the heat pump comprises: an evaporator installed in 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 main condenser installed inside the 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 main 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 main condenser and the expansion valve and is connected to the auxiliary condenser; a check valve installed in the second branch; Further comprising a pressure adjusting valve installed in a conduit connecting the heater and the heater. [3] The refrigeration system of claim 2, wherein the main condenser comprises: a first main condenser connected to the compressor and through which the refrigerant passes; a second main condenser connected to the first main condenser, And a third main condenser connected to the second main condenser and through which the refrigerant passed through the second main condenser flows,
The third main condenser, the first main condenser, and the first main condenser, the third main condenser, the second main condenser, and the first main condenser, Wherein the second main condenser and the first main condenser are sequentially spaced apart from each other. The apparatus of claim 1, further comprising an outside air heat exchanging unit for exchanging air with air flowing into the circulating duct through the air outlet. delete 2. The heat pump as claimed in claim 1, wherein the air-direction induction swash plate is formed to be inclined from the dispersion plate to the lower portion of the drying bases so as to guide the flow of air in any one of the adjacent drying hobs. Indirect heating type drying device using.
KR1020150164309A 2015-11-23 2015-11-23 drying apparatus of indirect heating type using heat pump KR101638604B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200488048Y1 (en) 2018-11-02 2018-12-07 심우정 Drying device for agricultural and marine products
KR20190112347A (en) 2018-03-26 2019-10-07 윤영주 Cold reserving high temperature dehumidifier
KR102251194B1 (en) * 2020-11-06 2021-05-13 주식회사 시스웍스 Heat pump air conditioning system for livestock use
KR102480681B1 (en) * 2022-06-16 2022-12-27 주식회사 그린에너텍 A multipurpose dryer enabling far-infrared rays radiation and waveform blowing of hot wind

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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KR101314156B1 (en) 2013-04-02 2013-10-04 (주)지엠아이 System for drying agriculture products and method thereof
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KR101460024B1 (en) * 2013-09-27 2014-11-11 에스더블유이엔지(주) Persimmon drying machine built-in dehumidifier which is changable the direction of the wind

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KR20190112347A (en) 2018-03-26 2019-10-07 윤영주 Cold reserving high temperature dehumidifier
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