KR101171850B1 - Dryer - Google Patents

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Publication number
KR101171850B1
KR101171850B1 KR1020090125659A KR20090125659A KR101171850B1 KR 101171850 B1 KR101171850 B1 KR 101171850B1 KR 1020090125659 A KR1020090125659 A KR 1020090125659A KR 20090125659 A KR20090125659 A KR 20090125659A KR 101171850 B1 KR101171850 B1 KR 101171850B1
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KR
South Korea
Prior art keywords
air
drying
evaporator
temperature
chamber
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Application number
KR1020090125659A
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Korean (ko)
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KR20110068615A (en
Inventor
김종률
김욱중
이공훈
Original Assignee
(주)에프티이앤이
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Priority to KR1020090125659A priority Critical patent/KR101171850B1/en
Publication of KR20110068615A publication Critical patent/KR20110068615A/en
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Publication of KR101171850B1 publication Critical patent/KR101171850B1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F26B9/066Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers the products to be dried being disposed on one or more containers, which may have at least partly gas-previous walls, e.g. trays or shelves in a stack
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08Humidity
    • F26B21/086Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle

Abstract

The present invention provides a low temperature and humid air introduced into the air conditioning chamber from the drying chamber through an air inlet formed at a lower side of the partition and a case in which an internal space is divided into a drying chamber and an air conditioning chamber in which a drying object is dried by the partition wall. Heat exchange with a first evaporator to dehumidify, heat the dehumidified air or outside air with a first indoor condenser to raise the temperature, and then supply a first heat pump to the upper part of the drying chamber, and the air in the air conditioning chamber. It provides a drying apparatus comprising a blower for directing the flow.
Therefore, since the air introduced from the drying chamber is dehumidified by using the first heat pump, and the temperature of the air supplied to the drying chamber is increased, the drying apparatus can effectively dry the drying object with a simple structure. In addition, since the coefficient of performance of the first heat pump is significantly higher than that of a general electric heater, energy utilization efficiency is improved.

Description

Drying Device {Dryer}
The present invention relates to a drying apparatus, and more particularly to a drying apparatus with improved energy use efficiency.
The drying process is an essential process required in most industries, such as aquatic products, paper, textiles, wood and food. In the drying step, a large amount of energy is consumed because the object to be dried is dried for drying. In particular, the dryer using the hot air as a heat source in the industrial dryer is more than 90%, since most of the efficiency of the dryer is very low 30 ~ 50%, there is a problem that the enormous heat energy is lost to the exhaust heat.
An object of the present invention is to provide a drying apparatus with improved energy use efficiency.
The present invention is a low-temperature and humid air introduced into the air-conditioning chamber from the drying chamber through the case in which the interior space is divided into a drying chamber and an air conditioning chamber in which the object to be dried is dried by the partition wall, and an air inlet formed at the lower side of the partition wall. Heat exchange with the first evaporator to dehumidify, heat exchange the dehumidified air or outside air with the first indoor condenser to raise the temperature, and then supply the first heat pump to the upper part of the drying chamber and the air conditioning chamber. It provides a drying apparatus including a blower for inducing the flow of air.
In the present invention, the drying apparatus, the air introduced from the first evaporator is further dehumidified by heat exchange with the second evaporator, and the air or outdoor air dehumidified by the second evaporator is exchanged with the second indoor condenser to increase the temperature. After raising, the pump may further include a second heat pump introduced into the first indoor condenser. At this time, the first evaporator, the second evaporator, the second indoor condenser and the first indoor condenser are arranged in an upward direction from a lower part of the air conditioning chamber, and the blower controls the flow of air from a lower direction to an upper direction. Induce. The first heat pump may further include a first outdoor condenser for supercooling the refrigerant condensed in the first indoor condenser by exchanging heat with the outside air, and the second heat pump may be configured in the second indoor condenser. It may further include a second outdoor condenser for supercooling the heat condensed refrigerant to the outside air. At this time, the drying apparatus, when the outside air temperature is less than the set temperature, the air from the second evaporator to the second indoor condenser flows, and if the outside temperature is above the set temperature, the air flowing from the second evaporator to the outside It may further include a damper for discharging and supplying the outside air to supply to the second indoor condenser.
Further, in the present invention, the drying apparatus is disposed in the drying chamber, the drying cabinet is formed in the drying cabinet, the guide vane of the perforated plate shape is formed on the sides to equalize the inflow and outflow of air, and the drying object It may further include a trolley having trays arranged along the top and bottom to be stacked, and a drying chamber blower for circulating air in the drying chamber.
Since the drying apparatus of this invention dehumidifies the air which flows in from a drying chamber using a 1st heat pump, and heats up the air supplied to the said drying chamber, it can dry a drying object with a simple structure. In addition, since the coefficient of performance of the first heat pump is significantly higher than that of a general electric heater, energy utilization efficiency is improved.
1 shows a schematic configuration diagram of a drying apparatus 100 according to an embodiment of the present invention. The drying apparatus 100 includes a case 130, a first heat pump 110, a blower 140, a drying chamber blower 150, and a damper 160. The case 130 is divided into a drying chamber 132 and an air conditioning chamber 131 in which an interior space is dried by the partition wall 135. An air inlet 135a is formed below the partition 135, and an air outlet 135b is formed above the partition 135.
A drying cabinet 170 is disposed in the drying chamber 132. The trolley 180 is located in the drying cabinet 170. A roller 181 is installed at the lower portion of the trolley 180 to move to a desired position. The trolley 180 includes trays 182 spaced apart from each other along the top and bottom so that the drying object (M) is stacked. The drying object (M) may be selected in various ways, for example, agricultural and marine products, paper, fiber, wood, food and the like.
Sides of the drying cabinet 170 are formed with guide vanes 175 having a perforated plate shape to guide the air inflow and outflow uniformly. Therefore, air in the drying chamber 132 uniformly flows into the trays 182 to dry the drying object M, and then flows to the outside of the drying cabinet 170 again. The drying chamber blower 150 circulates the air in the drying chamber 132, thereby preventing stagnation of air in the drying chamber 132 and reducing the drying time of the drying object M. FIG.
The first heat pump 110 includes a first compressor 111, a first indoor condenser 112, a first outdoor condenser 113, a first expansion valve 114, and a first evaporator 115. The first indoor condenser 112 and the first evaporator 115 are disposed in the air conditioning chamber 1312, and the first indoor condenser 112 is positioned above the first evaporator 115.
The first outdoor condenser 113, the first compressor 111, and the first expansion valve 114 are located outside the case 130. The first outdoor condenser 113 is disposed in the first outdoor auxiliary case 139 to facilitate heat transfer by the first outdoor blowers 145. The blower 140 is disposed in the air conditioning chamber 131 to generate a flow of air in the air conditioning chamber 131. That is, the blower 140 is mounted to the air discharge port 135b to raise the air flowing from the supply suction port 135a and then recycle the air to the drying chamber 132 again through the air discharge port 135b.
A first control valve 116 is installed on the pipe 118 between the first indoor condenser 112 and the first expansion valve 114, the second control valve 117 is the first indoor condenser ( 112 is installed on the pipe 119 between the first outdoor condenser 113. The first control valve 116 and the second control valve 117 control the flow of fluid on the pipes 118 and 119 to determine whether to use the first outdoor condenser 113.
A drainage hole 138 is formed in the lower portion of the air conditioning chamber 132 for external drainage of dehumidified water. A drain pipe 137 is connected to the drain hole 138, and a drain valve 136 is installed at the drain pipe 137 to control the drainage of the air conditioning chamber 131.
The damper 160 controls the flow of air between the first evaporator 115 and the first indoor condenser 112. That is, when the outside air temperature is lower than the set temperature, the closing plate 165 of the damper 160 is rotated in the vertical direction, so that air from the first evaporator 115 to the first indoor condenser 112 flows ( Closed driving mode). If the outside temperature is greater than or equal to the set temperature, the closing plate 165 of the damper 160 rotates in the horizontal direction to close between the first evaporator 115 and the first indoor condenser 112 (open type). Driving mode). Therefore, the air passing through the first evaporator 115 is discharged to the outside, the outside air flows into the first indoor condenser 112.
Hereinafter, the operation of the drying apparatus 100 will be described in detail. The drying apparatus 100 is operated in the open and closed operating mode by the operation of the damper 160, Figure 1 shows the flow of refrigerant and air in the closed operating mode.
First, the operation of the first heat pump 110 will be briefly described. The refrigerant discharged in the gas state of high temperature and high pressure from the first compressor 111 is condensed primarily in the first indoor condenser 112. Thereafter, the refrigerant is condensed and subcooled secondly in the first outdoor heat exchanger 113 to become a high-pressure liquid state, and then throttled by the first expansion valve 114 to obtain a low-temperature low-pressure wet steam state. The refrigerant flows into the first compressor 111 again after the low-pressure gas phase state is generated by the first evaporator 115.
The air flowing into the air conditioning chamber 131 from the air inlet 135a is in a humid (about 80% relative humidity) state of low temperature (40-50 ° C.). The introduced air is dehumidified by heat exchange with the first evaporator 115. Water dehumidified from the air is drained to the outside through the drain hole 138 of the air conditioning chamber 131. The dehumidified air is changed to a high temperature state by the first outdoor condenser 113 and then discharged to the drying chamber 132 through the air discharge port 135b. The temperature of the air discharged to the drying chamber 132 is 60 ~ 80 ℃, relative humidity is about 30%.
The air discharged into the drying chamber 132 is circulated by the drying chamber blower 150 to perform heat and mass exchange with the drying object M, thereby drying the drying object M. By the heat and mass exchange, the temperature of the air is lowered and the humidity is increased. The air of the low temperature and high humidity is introduced into the air conditioner through the air inlet 135a again by the blower 140.
As described above, in the closed driving mode, air in the case 130 is circulated without being discharged to the outside. If the outside air temperature is lower than the set temperature, when the outside air is introduced to raise the temperature to the first indoor condenser 112, the final temperature is inevitably low. Therefore, it is advantageous in terms of energy efficiency to use air that has passed through the first evaporator 115. The set temperature may be selected in various ways. In the present embodiment, the set temperature corresponds to the temperature of the air passing through the first evaporator 115 in the normal operating state and design conditions of the drying apparatus 100.
In addition, the control condition of the damper 160 may be not only the outside temperature but also the relative humidity of the outside air, and both the outside temperature and the relative humidity may be considered. If the relative humidity is used, if the relative humidity of the outside air is low, it is an open type operation mode, and if the relative humidity of the outside air is high, it is a closed type operation mode. This is because the drying performance is improved only when the relative humidity of the air discharged to the drying chamber 132 is low.
2 shows a state in which the first outdoor condenser 113 is not used in the closed operation mode. In general, the first heat pump 110 has a larger heat exchange amount required in the first indoor condenser 112 than the first evaporator 115, and the refrigerant flowing into the first expansion valve 114 is subcooled. The state should remain stable. However, the heat exchange area of the first indoor condenser 112 is limited. In FIG. 1, a second heat exchanger is used as the second outdoor condenser 113. However, when the drying capacity required in the drying chamber 132 is not large, the heat exchange amount required in the first indoor condenser 113 also decreases. Therefore, in order to reduce energy consumption, the first control valve 116 is opened and the second control valve 116 is closed to block the inflow of the refrigerant into the first outdoor condenser 113, and the first The operation of the outdoor blowers 145 is stopped.
3 shows the flow of refrigerant and air in the drying apparatus 100 in operation in the open mode of operation. The air flowing into the air conditioning chamber 131 from the air inlet 135a is in a low temperature and humid state. The introduced air is dehumidified by heat exchange with the first evaporator 115 and then discharged to the outside. Air is introduced from the outside through the damper 160, and the introduced air is changed to a high temperature state by the first indoor condenser 112, and then through the air outlet 135b to the drying chamber 132. Discharged. The air discharged into the drying chamber 132 is circulated by the drying chamber blower 150 to perform heat and mass exchange with the drying object M, thereby drying the drying object M. By the heat and mass exchange, the temperature of the air is lowered and the humidity is increased. The air of the low temperature and high humidity is introduced into the air conditioner 131 through the air inlet 135a again by the blower 140.
As described above, in the open operation mode, external air is used as an air source supplied to the drying chamber 132. If the outside air temperature is higher than the set temperature, when raising the outside air to the first indoor condenser 112, the final temperature is higher than the closed operating mode. Therefore, the temperature of the air supplied to the drying chamber 132 can be increased, so that the drying efficiency of the drying apparatus 100 is improved.
As described above, the first heat pump 110 is used to dehumidify and raise the temperature of the air supplied to the drying chamber 132. Since the first heat pump 110 generally has a coefficient of performance (COP) of 3 to 5, the first heat pump 110 may improve energy use efficiency more than twice as compared to a conventional hot air dryer (electric heater use method).
4 is a schematic partial schematic diagram of a drying apparatus 200 according to another embodiment of the present invention. The drying apparatus 200 includes a case 230 in which an inner space is divided into a drying chamber 231 and an air conditioning chamber 232 by the partition wall 235. An air inlet 235a is formed below the partition 235, and an air outlet 235b is formed above. The construction and effect of the interior of the drying chamber 230 is similar to the above-described embodiment, detailed description thereof will be omitted. In the following, description will be made mainly on points different from the above-described embodiment.
The present embodiment differs from the above-described embodiment in that the second heat pump 220 as well as the first heat pump 210 is provided to form a two cycle structure. A P-h diagram of a two cycle structure is shown in FIG. 5. In FIG. 5, a first curve f1 is a P-h diagram of the first heat pump 210, and a second curve f2 is a P-h diagram of the second heat pump 220. R124 is used as the refrigerant of the first heat pump 210 and R134a is used as the refrigerant of the second heat pump 220.
4 and 5, the first heat pump 210 includes a first compressor 211, a first indoor condenser 212, a first outdoor condenser 213, a first expansion valve 214, and a first expansion pump 214. One evaporator 215 is included. In addition, a first control valve 216 and a second control valve 217 are installed on the pipes 218 and 219 of the first heat pump 210 to control whether the first outdoor condenser 213 is used. It is.
The second heat pump 220 also includes a second compressor 221, a second indoor condenser 222, a second outdoor condenser 223, a second expansion valve 224, and a second evaporator 225. The second evaporator 225 and the second internal condenser 223 are disposed in the air conditioning chamber 231 to dehumidify and heat the air supplied into the drying chamber 232. On the pipes 228 and 229 of the second heat pump 220, a third control valve 226 and a fourth control valve 227 are installed to control whether the second outdoor condenser 223 is used. have.
A damper 260 is installed in the air conditioning chamber 231 to control the flow of air in the air conditioning chamber 231. The structure and operation of the damper 260 may refer to the damper 260 of the above-described embodiment.
The first evaporator 215, the second evaporator 225, the second indoor condenser 222, and the first indoor condenser 212 are arranged in the air conditioning chamber 231 from the bottom to the upper direction. . That is, based on the high temperature of the refrigerant, the first indoor condenser 212, the second indoor condenser 222, the first evaporator 215, and the second evaporator 225 are in order. In order to improve the dehumidification performance of the air flowing from the drying chamber 232, first by the first evaporator 215 is dehumidified while the temperature is lowered, and then by the second evaporator 225 with a lower temperature of the refrigerant In addition, the temperature is lowered and dehumidified. In addition, after the temperature of the dehumidified air is increased by the second indoor condenser 222, the temperature is further increased by the first indoor condenser 212 having a higher temperature of the refrigerant. By this arrangement structure, the temperature structure in the air conditioning chamber 231 is in an optimum state.
In the case of the drying apparatus of the two cycle structure of this embodiment, the system is relatively simple. In addition, since the first heat pump 210 and the second heat pump 220 may be independently controlled or interlocked with each other, the control is very easy. In addition, the temperature of the air discharged to the drying chamber 232 is very high. Therefore, the drying device 200 has a larger initial investment cost than the drying device having a single cycle structure, but the COP is very large, thereby reducing the maintenance cost.
The operation structure of the closed mode and the open mode of the drying apparatus 200 is similar to the operating mode of the drying apparatus 100 of the above-described embodiment, a detailed description thereof will be omitted. In addition, the details of the use structure of the first outdoor condenser 213 and the second outdoor condenser 223 of the drying apparatus 200 is similar to the first outdoor condenser 113 of the above-described embodiment, the detailed description Omit.
Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.
1 is a schematic configuration diagram of a drying apparatus according to an embodiment of the present invention, showing a flow of a refrigerant and air.
FIG. 2 is a block diagram showing the flow of refrigerant and air in a state where the first outdoor condenser is not used in the drying apparatus shown in FIG. 1.
FIG. 3 is a block diagram showing when the drying apparatus shown in FIG. 1 operates in an open operation mode.
4 is a schematic partial configuration diagram of a drying apparatus according to another embodiment of the present invention.
FIG. 5 is a schematic P-h diagram of the first heat pump and the second heat pump of the drying apparatus shown in FIG. 4.
<Brief description of the main parts of the drawing>
100, 200: drying apparatus 110, 210: first heat pump
111, 211: first compressor 112, 212: first indoor condenser
113, 213: first outdoor condenser 114, 214: first expansion valve
115, 215: first evaporator 116: first control valve
117: second control valve 130, 230: case
140: blower 150: drying chamber blower
160: damper 170: drying cabinet
175: guide vane 220: second heat pump

Claims (5)

  1. A case in which the internal space is partitioned into a drying chamber and an air conditioning chamber in which the object to be dried is dried by the partition wall;
    The low temperature and humid air introduced into the air conditioning chamber from the drying chamber through an air inlet formed below the partition wall is dehumidified by heat exchange with a first evaporator installed under the air conditioning chamber, and the dehumidified air or outside air is A first heat pump configured to heat the first condenser installed at an upper portion of the air conditioning chamber to increase the temperature, and then supply the upper portion of the drying chamber through an air discharge port formed at an upper side of the partition wall;
    A blower for inducing a flow of air from a bottom to a top in the air conditioning chamber; And
    Is rotatably coupled to the side wall of the case, when rotated in the horizontal direction to block the flow of air from the lower side to the upper direction of the air conditioning chamber, closed in the vertical direction to block the air inlet formed in the side wall of the case A damper having a plate,
    The closing plate,
    When the outside air temperature is lower than the set temperature, the air flows from the first evaporator to the first indoor condenser in the air conditioning chamber in a state in which the outside air inlet is blocked by rotating in the vertical direction, and the outside temperature is the set temperature. If it is above, it rotates in the horizontal direction to block the flow of air from the lower side to the upper direction of the air conditioning chamber to discharge the air flowing from the first evaporator to the outside and to supply the outside air to the first indoor condenser Drying equipment.
  2. The method according to claim 1,
    The air introduced from the first evaporator is further dehumidified by exchanging heat with the second evaporator, and the temperature is increased by exchanging air or outside air dehumidified by the second evaporator with the second indoor condenser, and then, into the first indoor condenser. Further comprising a second heat pump for inflow,
    The first evaporator, the second evaporator, the second indoor condenser and the first indoor condenser are arranged in an upward direction from the bottom of the air conditioning chamber, wherein the first evaporator and the second evaporator are arranged in the lower portion of the closing plate. And the first indoor condenser and the second indoor condenser are located above the closing plate.
  3. The method according to claim 2,
    The first heat pump further includes a first outdoor condenser for supercooling the refrigerant condensed in the first indoor condenser by exchanging heat with outside air,
    The second heat pump further comprises a second outdoor condenser for supercooling the refrigerant condensed in the second indoor condenser by exchanging heat with outside air.
  4. The method according to any one of claims 1 to 3,
    A drying cabinet disposed in the drying chamber, the guide vanes having a perforated plate shape formed on the side surfaces thereof to equalize the inflow and outflow of air;
    A trolley disposed in the drying cabinet and having trays arranged up and down so that drying objects are stacked; And
    Drying apparatus further comprises a drying chamber blower for circulating the air in the drying chamber.
  5. delete
KR1020090125659A 2009-12-16 2009-12-16 Dryer KR101171850B1 (en)

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KR1020090125659A KR101171850B1 (en) 2009-12-16 2009-12-16 Dryer
PCT/KR2010/001866 WO2011074746A1 (en) 2009-12-16 2010-03-26 Drying device

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KR101171850B1 true KR101171850B1 (en) 2012-08-07

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CN104534858A (en) * 2014-08-06 2015-04-22 秦振光 Device and method for drying coal
KR20160142906A (en) 2015-06-03 2016-12-14 한국에너지기술연구원 Thermal Alternating Heat Pump Drying System Having Changeable Guide Vane
KR101760331B1 (en) 2015-02-04 2017-07-21 오제욱 Dehumidification Dryer
CN108534477A (en) * 2018-04-19 2018-09-14 南华大学 A kind of drying system
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CN104534858A (en) * 2014-08-06 2015-04-22 秦振光 Device and method for drying coal
CN104534858B (en) * 2014-08-06 2017-09-01 秦振光 A kind of apparatus and method for drying coal
KR101760331B1 (en) 2015-02-04 2017-07-21 오제욱 Dehumidification Dryer
KR20160142906A (en) 2015-06-03 2016-12-14 한국에너지기술연구원 Thermal Alternating Heat Pump Drying System Having Changeable Guide Vane
CN108534477A (en) * 2018-04-19 2018-09-14 南华大学 A kind of drying system
CN108534477B (en) * 2018-04-19 2020-10-30 南华大学 Drying system
CN109631514A (en) * 2018-12-20 2019-04-16 安徽顾德森家居有限公司 A kind of Furniture manufacture High-efficiency dryer

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