KR101844865B1 - Dryer Using Heat Pump and Plastic Heat Exchanger - Google Patents

Dryer Using Heat Pump and Plastic Heat Exchanger Download PDF

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Publication number
KR101844865B1
KR101844865B1 KR1020150087119A KR20150087119A KR101844865B1 KR 101844865 B1 KR101844865 B1 KR 101844865B1 KR 1020150087119 A KR1020150087119 A KR 1020150087119A KR 20150087119 A KR20150087119 A KR 20150087119A KR 101844865 B1 KR101844865 B1 KR 101844865B1
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South Korea
Prior art keywords
air
heat exchanger
dryer
condenser
evaporator
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KR1020150087119A
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Korean (ko)
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KR20160149659A (en
Inventor
유성연
김태호
김명호
고재곤
Original Assignee
충남대학교산학협력단
주식회사 엑트
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Priority to KR1020150087119A priority Critical patent/KR101844865B1/en
Publication of KR20160149659A publication Critical patent/KR20160149659A/en
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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/40—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by drying or kilning; Subsequent reconstitution
    • 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
    • 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
    • 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
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air

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

Abstract

The present invention relates to a dryer using a heat pump and a plastic heat exchanger, and includes a dryer main body 10 having an outside air inlet 11 and an air outlet 12 formed on both sides thereof and having a housing space therein; An evaporator (20) installed below the accommodation space; A condenser 30 installed on the evaporator 20; A heat exchanger (40) installed between the evaporator (20) and the condenser (30); And a drying table 50 having a multi-layer structure installed on the upper portion of the condenser 30. The air having passed through the drying table 50 passes through the evaporator 20 through the heat exchanger 40, An air flow path is formed so as to pass through the heat exchanger 40 and the condenser 30. With this configuration, the energy utilization efficiency of the present invention is significantly improved.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dryer using a heat pump and a plastic heat exchanger,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dryer for agricultural and marine products, and more particularly, to a dryer using a heat pump and a heat exchanger that achieve a dual energy saving effect by using a heat pump and a heat exchanger as heat sources.

Agricultural products such as rice, barley and pepper and aquatic products such as fish and seaweed (hereinafter collectively referred to as "agricultural and marine products") contain a lot of water. In order to store or store such agricultural and marine products for a long period of time, For this purpose, conventionally, a natural drying method is used to dry agricultural and marine products.

However, when drying the agricultural and marine products using the natural drying method, the drying cost is low and the quality of the agricultural and marine products after drying is excellent, so it is generally adopted in the farm etc. However, And it also takes a lot of time for labor and construction.

In order to solve the disadvantages of the natural drying method as described above, an artificial drying method using a dryer has been adopted. As a result, various types of agricultural and marine products driers have been developed and used. It is possible to dry large amounts of agricultural and marine products at a time in a much shorter time than the natural drying method.

Generally, in agricultural and marine products dryer, fossil fuel or electric heater is used to heat the air, and then the heated air is supplied to the agricultural and marine products in the dryer by using the air supply fan, thereby drying agricultural and marine products. When the agricultural and marine products are dried, a large amount of water evaporated from the agricultural and marine products in the drying process is present inside the dryer. In this case, since the drying efficiency of the dryer is decreased, the air containing moisture is periodically removed At this time, since much heat energy is discharged to the outside of the dryer together with air, there is a large loss of heat energy, and it is not efficient because it is required to supply heat as much as the amount of lost heat energy.

In order to compensate for the disadvantages of the above-described heater type drier, a dryer using a refrigeration cycle such as a heat pump has been developed and used. As an example of such a dryer, there is a dehumidifying dryer '.

The dryer disclosed in the above patent document is an air circulation type dehumidifying dryer using a refrigeration cycle, in which air is heated by a condenser and then supplied to the inside of the drying chamber to dry agricultural and marine products, and the air discharged from the drying chamber is cooled by an evaporator, In the circulation process of heating (drying) → cooling (dehumidification) → reheat (dehumidification) → heating (drying), the air cooled by the evaporator is installed again by installing reheater near the evaporator, So that the energy utilization efficiency can be increased.

However, when the reheating system is added to the drying system as described above, the system becomes complicated. In addition, since the reheating in this patent document has the function of the secondary evaporator, there is no substantial benefit in energy utilization efficiency.

In most dryers using a refrigeration cycle, as shown in FIG. 1, when the dryer is constructed, the drying chamber and the refrigeration cycle (refrigeration unit) are arranged in separate spaces, There is a problem that a large installation space is required.

Therefore, it is required to develop a dryer capable of efficiently utilizing space and having high energy utilization efficiency and drying efficiency.

KR 10-2015-0051353 A KR 10-1409854 B1 KR 10-1260418 B1 KR 10-1409855 B1 KR 10-1095897 B1

It is an object of the present invention to provide a dryer having high efficiency of energy utilization, efficient use of installation space, and improved drying efficiency.

It is an object of the present invention to provide a drying apparatus and a method of manufacturing the same, An evaporator installed on a lower side of the accommodation space; A condenser installed at an upper portion of the evaporator; A heat exchanger installed between the evaporator and the condenser; And the air passage is formed so as to pass through the evaporator through the heat exchanger and then through the heat exchanger and the condenser again.

The present invention is characterized in that the heat exchanger comprises: a first heat transfer plate having a "C " And a plate heat exchanger in which a plurality of second heat transfer plates having a "?" -Shaped flow passage are alternately arranged is used.

Further, the present invention is characterized in that the distance between the projections formed on the first and second heat transfer plates is formed in proportion to the length of the flow path formed by the projections.

Further, the present invention is characterized in that an electric damper for controlling the opening and closing of the oil passage is provided in the outside air introduction port and the air discharge port, respectively.

In addition, the present invention is characterized in that the electric damper is controlled such that outside air is introduced when the quality of the air inside the dryer body deviates from a certain standard.

In the present invention, air is heated using a condenser and supplied to the inside of the dryer, and the efficiency of energy utilization is high since both the condensation heat and the evaporation heat are used while removing the moisture contained in the air inside the dryer by using the evaporator.

In addition, the present invention utilizes a heat exchanger to recover heat energy contained in the air discharged from the agricultural and marine products drying hob and to heat the supplied air to the condenser, so that cooling and heating are performed by self heat exchange without external energy input, The efficiency is greatly improved.

Since the flow resistance of each channel is substantially the same when the air flows along the flow path formed in the first and second heat transfer plates of the heat exchanger, the drying of the agricultural and marine products is uniformly performed and the heat exchange efficiency of the heat exchanger is further improved .

1 is a schematic view showing an example of a conventional dryer,
FIG. 2 is a schematic view showing an example of a dryer according to the present invention,
3 is a plan view showing a structure of a heat transfer plate of a heat exchanger according to the present invention,
FIG. 4 is a diagram showing the air flow during drying operation in the dryer according to the present invention,
5 is a configuration diagram showing the air flow at the time of introduction of outside air in the dryer according to the present invention.

Hereinafter, the structure and operation of the present invention will be described in more detail with reference to the accompanying drawings, which show preferred embodiments.

The present invention provides an energy-saving dryer having high energy utilization efficiency and improved drying efficiency. To this end, the dryer of the present invention includes a dryer body 10, an evaporator 20, a condenser 30, , A heat exchanger (40), and a drying table (50).

The dryer main body 10 is made of a metal or a synthetic resin and has a housing space for accommodating the agricultural and marine products to be dried and the equipment for drying the agricultural and marine products to be placed therein. On its surface, a heat insulating material is attached so that high-temperature thermal energy existing in the dryer is not released to the outside, and on the outer surface thereof, the operation of the electric dampers 11A, 12A, the blowing fan 13 and the compressor 14 A controller (not shown) is provided.

As shown in FIG. 2, the accommodation space provided in the dryer main body 10 is divided into two spaces by a pair of inner vertical walls provided at regular intervals above and below, A blowing fan 13 is installed at an upper portion of the drying table 50 to circulate the air inside the dryer and circulate the air inside the dryer 50. The drying table 50 is provided with a condenser 30 A heat exchanger 40 and an evaporator 20 are sequentially disposed in the evaporator 20 and an air passage B through which the air having passed through the evaporator 20 is moved is formed below the evaporator 20.

Further, another space separated by the vertical wall functions as an air passage (A) through which the air moves.

The outside air introduction port 11 and the air discharge port 12 are located on both sides of the lower end of the dryer body 10 and the inside of the outside air introduction port 11 and the air discharge port 12 are respectively driven by motors Dampers D1 and D2 and a filter F are installed.

The drying apparatus main body 10 is provided with a door (not shown) through which the drying base 50 containing the agricultural and marine products to be dried is slid in the horizontal direction and is guided into the dryer main body 10, And is withdrawn from the inside.

In addition, a controller (not shown) is provided on the outer surface of the dryer main body 10 to allow the user to control the operation of the electric dampers D1, D2, the compressor 14 and the blowing fan 13. [

An evaporator 20 is installed on the lower side of the inside of the dryer main body 10. A refrigerant in a low temperature and low pressure state flows through the evaporator 20 in the process of passing through the expansion valve 15 and is discharged from the heat exchanger 40 The moisture contained in the air is removed while being condensed, and then the moisture contained in the air is removed through the air passage B formed on the lower side by the blowing fan and then returned to the inside of the heat exchanger 40 ≪ / RTI >

A condensed water discharge pipe (not shown) penetrates the wall of the dryer main body 10 so as to discharge the condensed water generated by the contact with the evaporator 20 to the outside of the dryer main body 10, Respectively.

A condenser 30 is installed in the upper part of the evaporator 20. A refrigerant in a high temperature and high pressure state compressed by the compressor 14 flows into the condenser 30 and is circulated through the heat exchanger 40, , And the heated air is supplied to a plurality of drying bases (50) provided on the upper part by a blowing fan (13).

In addition, the air heated by the condenser 30 is cooled while passing through the drying table 50, but is still in a high temperature state. Accordingly, in the present invention, the heat energy contained in the air discharged from the drying table 50 is used to heat the condenser 30 A heat exchanger 40 is installed between the evaporator 20 and the condenser 30 so as to heat the incoming air. In the present invention, the heat exchanger 40 is made of plastic A laminated plastic plate heat exchanger having a structure in which the first and second heat transfer plates 41 and 42 are alternately stacked is used.

When the heat exchanger 40 is installed between the evaporator 20 and the condenser 30 arranged in parallel to each other, the heat exchanger 40 is discharged from the drying table 50 as indicated by an arrow in FIG. The air flowing into the heat exchanger 60 through the heat exchanger 60 flows from the left side of the heat exchanger to the lower side while the air is discharged from the evaporator 20 through the air passage B to the heat exchanger 40 flows in from the right side of the heat exchanger 40 to have a flow of "B" shape flowing upward. In such a case, a dead zone is formed in a wide region to have a heat exchange efficiency .

In order to prevent this, in the present invention, the first and second heat transfer plates 41 and 42 constituting the heat exchanger 40 are respectively provided with the letter "a" and the letter "b" as shown in FIGS. 3 (a) A plurality of protrusions are formed so as to form a plurality of protrusions so as to form a flow path having a rectangular shape. By the structure of the first and second heat transfer plates 41 and 42, air flows countercurrently in the heat exchanger, and the heat exchange efficiency is greatly increased.

When the plurality of projections are formed on the first and second heat transfer plates 41 and 42, if the interval between the projections is made constant, the air flow inside the heat exchanger becomes uneven and the heat exchange efficiency is lowered. When the protrusions are formed on the first and second heat conductive plates 41 and 42 so as to prevent the flow resistance of each flow channel from flowing along the flow channel, So that the heat exchanging efficiency of the heat exchanger is further improved and the drying of the agricultural and marine products is uniformly performed.

Hereinafter, a method of operating the agricultural and marine product dryer of the present invention having the above structure will be briefly described.

First, the door installed on the front surface of the dryer body 10 is opened, the drying stand 50 is taken out from the dryer body 10, and the dried agricultural and fishery products are placed on the drying stand 50, The air in the dryer main body 10 is blown by the blowing fan 13 into the air passage (as shown in FIG. 4) by operating the air blowing fan 13 and the compressor 14 by operating the controller, A and passes through the inside of the heat exchanger 40 and is cooled and dehumidified while passing through the evaporator 20 and then flows into the heat exchanger 40 through the air passage B. In this process, Exchanged with the air introduced into the heat exchanger 40 through the passage A to be heated by the heat exchanger 40 and then flows into the condenser 30 and is heated again and supplied to the drying stand 50. As a result, Is supplied to the drying table 50, and then the air supplied to the drying table 50 And then flows into the heat exchanger (40) again through the air passage (A), and continuously drying the agricultural and marine products placed on the drying table (50).

On the other hand, if the drying process is repeated, the quality of the air circulating inside the dryer body 10 may be deteriorated due to foreign matter, dust, etc. of the agricultural and marine product. In this case, 10) outside of the dryer main body 10 while introducing fresh air.

To this end, a contamination sensor (not shown) is installed inside the dryer body 10 and connected to the controller. With this configuration, the air quality inside the dryer body 10 detected by the contamination sensor is input to the controller The openings of the electric dampers D1 and D2 provided in the outside air inlet 11 and the air outlet 12 of the dryer main body 10 are controlled by the controller to control the opening of the dryer inside Fresh air is introduced into the air.

As described above, according to the present invention, air is heated and supplied by using a refrigeration cycle, and moisture contained in the air is removed. Therefore, it is not necessary to periodically discharge the air inside the dryer to improve drying efficiency, The air to be supplied to the condenser is preheated and supplied to the condenser, so that the energy utilization efficiency is greatly improved.

10: dryer main body 11: outside air inlet
12: air outlet 13: blowing fan
14: compressor 15: expansion valve
20: evaporator 30: condenser
40: heat exchanger 41: first heat transfer plate
42: second heat transfer plate 50:
A, B: air passage D1, D2: electric damper
F: Filter

Claims (5)

A dryer main body 10 having an outside air inlet 11 and an air outlet 12 on both sides thereof and having a receiving space therein;
An evaporator (20) installed below the accommodation space;
A condenser 30 installed on the evaporator 20;
A heat exchanger (40) installed between the evaporator (20) and the condenser (30);
A multi-layered drying rack (50) installed on the top of the condenser (30);
And a blowing fan (13) installed at an upper portion of the drying stand (50)
An air passage A is formed between the drying table 50 and the inner wall of the dryer body 10 by a vertical wall so as to be separated from the drying table 50,
The air that has passed through the condenser 30 and passed through the drying table 50 passes through the air passage A and the heat exchanger 40 and the evaporator 20 are moved to the "Quot; C "shape, and then again passes through the heat exchanger (40) and the condenser (30) in a"
The heat exchanger (40) includes a first heat transfer plate (41) formed with a plurality of projections spaced from each other so as to form a "? &Quot; Shaped heat exchanger (42) having a plurality of projections spaced from each other so as to form a "
The outside air inlet (11) and the air outlet (12) are provided with electric dampers (D1, D2)
The air quality of the inside of the dryer body 10 detected by the contamination sensor is input to the controller, and the quality of the air is adjusted to a predetermined level And controls the opening degree of the electric dampers (D1, D2) so as to introduce outside air when the temperature is outside the reference range. delete delete The method according to claim 1,
Wherein a distance between the protrusions formed on the first and second heat transfer plates (41, 42) is formed in proportion to the length of the flow path formed by the protrusions. delete
KR1020150087119A 2015-06-19 2015-06-19 Dryer Using Heat Pump and Plastic Heat Exchanger KR101844865B1 (en)

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KR101844865B1 true KR101844865B1 (en) 2018-05-18

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200400911Y1 (en) 2005-08-11 2005-11-09 주식회사공간코리아 The low-temperature drying machine of use heat pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101095897B1 (en) 2010-12-10 2011-12-21 (주)덕산코트랜 Humidity eliminate drier for agricultural and marine products with a function of cold storage
KR101260418B1 (en) 2012-07-30 2013-05-07 정종인 Dryer and cold storage system using heat pump and method for operating the system
KR101536819B1 (en) 2013-11-04 2015-07-16 신남섭 Heat pump dryer
KR101409854B1 (en) 2013-12-26 2014-06-19 주식회사 에이티이엔지 Heat pump type cool and hot-air drying machine
KR101409855B1 (en) 2013-12-26 2014-06-19 주식회사 에이티이엔지 Heat pump type hot-air drying machine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200400911Y1 (en) 2005-08-11 2005-11-09 주식회사공간코리아 The low-temperature drying machine of use heat pump

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