JPS6280485A - Drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION ■)...Industrial Field of Application The present invention is mainly applicable to grains (rice, wheat, beans, etc.), seeds, and other agricultural products (dried potatoes, shiitake mushrooms, etc.) stored in a warehouse. , tobacco, medicinal herbs, etc.), seafood, wood, etc.
In particular, it relates to drying equipment that efficiently dries at relatively high temperatures (e.g., around 60 to 80 degrees Celsius), and also at relatively low temperatures (
Example: 5-15℃) to room temperature (Example: 15-40℃)
However, it relates to a drying device that can perform efficient drying.

■) ... The applicant of the underlying technology previously filed Japanese Patent Application No. 57-193072, ``Drying System Using Refrigerator and Heat Exchanger,'' Japanese Patent Application No. 59-4318.
No. 6, the "dehumidifying dryer" applies various types of refrigerators with excellent dehumidifying properties and specially arranges its component equipment,
This is combined with a heat exchanger to form a specific circulation path.In particular, unlike conventional drying equipment of this kind, it maintains the dry air inside the refrigerator at a high temperature, while also making it ideal for refrigerators. The inventor has invented a drying device whose main feature is that it can be operated continuously for a long time under the conditions, and has applied for a patent.
The second heat exchanger has a two-stage arrangement, and thereby the heat exchange action is not carried out all at once as in the case of only one unit in the previous application, but is carried out in stages, thereby increasing the efficiency of heat exchange. In particular, we have succeeded in significantly improving the dehumidifying and drying ability.

■)...Structure The structure of the drying apparatus of the present invention will be explained with reference to its embodiments.
A compression refrigerating machine consisting of a compressor 1, evaporator 2, condenser 3, receiver tank, annocuumulator, expansion valve, etc.
For example, a 200 V, 1.5 Kw, 2 HP), absorption type refrigerator, and other refrigerators with existing configurations are applied to dehumidify the air inside the refrigerator containing the items to be dried. , in the method of drying the material to be dried, inside or outside (on the ceiling board, etc.) a storage body 6 (e.g., volume approximately 4.3 m) with an insulated and sealed structure consisting of an insulating panel 5 equipped with a door 4, etc. , a housing 7 having a heat-insulating structure is appropriately installed, and an evaporator 2, which is a part of a refrigerator, is installed in the housing 7.
and a heater 3a (condenser 3 or electric heater, etc.), and a first heat exchanger 8a and a second heat exchanger 8b configured as appropriate between the two.
An air inlet 9 is provided at -il+ of the first heat exchanger 8a, and an air passage 10a is provided between the other side and the → side of the second heat exchanger 8b, and the second heat exchanger A ventilation path 10b is provided between the other side of the container 8b and the front surface of the evaporator 2, and an exhaust port 11 is provided at the rear of the heater 3a, so that a part of the air in the storage body 6 can be removed. , the first heat exchanger 8a- by an appropriate intake or air supply means such as the intake fan 12
Second heat exchanger 8b-evaporator 2-second heat exchanger 8b-first
It is made to pass through the heat exchanger 8a and the heater 3a in this order.

In the above apparatus, (i), 13 is a drain pan, which processes water droplets generated by the dehumidification effect due to cooling condensation of the evaporator 2 and the second heat exchanger 8b.

(ii) The condenser 3 as an example of the heater 3a is
In the case of a drying system that operates mainly at a low temperature or room temperature, there are cases where it is not installed, and there are cases where it is not installed inside the apparatus of the present invention but is installed outside the refrigerator.

Further, the condenser 3 and an appropriate heater such as an electric heater may be installed in combination, or only one of them may be installed.

(iii) Also, in the illustrated example, the housing 7 equipped with the device of the present invention is installed on the ceiling board of the storage body G.
For example, the intake port 9 and the exhaust port 11 may be installed inside or on the external side of the storage unit, or even if installed separately from the storage unit.
If it communicates with the inside of the storage body 6, the whole (same).

(iv) Other components of the refrigerator, such as a compressor 1, a receiver tank, an assemblator, and an auxiliary condenser 3b in a compression refrigerator, are connected closely to the storage body 6 of the present invention. Place it on the top plate, etc., as appropriate.

(■) As described above, the first and second heat exchangers 8a and 8b exchange heat between the high-temperature chamber air that passes from the intake port 9 to the front of the evaporator 2 and the cooling air that has passed through the evaporator 2. Therefore, it is possible to use a so-called heat exchanger with an existing configuration, and its specific configuration is completely arbitrary. A rectangular block-like structure is used in which aluminum corrugated plates are alternately stacked crosswise in the right angle direction with a partition plate in the middle.

(vi) The auxiliary condenser 3b is appropriately installed outside the storage body 6,
When the condenser 3 in the device mainly functions for heating air, it is mainly used to compensate for the lack of condensing function inherent in the refrigerator.

(vii) Inside the storage body 6, for example, the periphery of the drying chamber 14 is partitioned with a perforated plate 15 or the like in order to improve drying efficiency;
By forming a ventilation path 16 and installing a circulation fan 17, an auxiliary heater 18, etc., the air inside the refrigerator circulates evenly throughout the interior of the refrigerator, and high-temperature dry air reaches the items to be dried in the drying chamber 14. Provide even contact to ensure uniform drying.

■)...Function Next, the function of the device of the present invention having the above configuration will be explained.
(at no load) through the first heat exchanger 8a to lower the temperature (about 40 to 50 degrees Celsius), then through the second heat exchanger 8b to exchange heat to lower the temperature to the appropriate temperature for the refrigeration function. (20~25℃
After that, the air is cooled (to about 12-17°C) through the evaporator 2 and dehumidified at the same time, and the cooled and dehumidified air is passed through the second and first heat exchangers 78b and 8. Heat exchange [The temperature of the high-temperature warehouse air (about 60 to 80 degrees Celsius) is lowered (to about 20 to 25 degrees Celsius), and the cooled dehumidified air (about 12 to 17 degrees Celsius) that has passed through the evaporator 2 is added? IA (43~
Heat exchange effect (approximately 53°C). ], the heated air is raised to the target internal temperature (approximately 60 to 80°C) through the heater 3a, and returned to the storage body 6, and the air inside the refrigerator is heated by the above-mentioned air circulation. and extremely effective dehumidification,
As a result, the drying material stored in the refrigerator can be dried extremely effectively.

■) ...Various data (i) ...Fig. 4 shows the above-mentioned apparatus according to the present invention (Fig. 1, Fig. 3, refrigerator...-200V, 1.5 Kw,
This is a graph showing the temperature changes at the following positions centering on the first and second heat exchangers in 211P, the internal volume of which is approximately 4.3 M), and the applicant of Fig. 5 first proposed this graph. The device according to the earlier invention for which a patent application has been applied (see Figure 2, that is, there is only one heat exchanger),
When compared with a graph showing the temperature change at each location under exactly the same conditions as the present invention, it can be immediately understood that there is a difference in the temperature reduction ability of the heat exchanger between the two, and that the device of the present invention is clearly improved. .

(A>...Intake port 9, first heat exchanger 8a inlet (i.e., internal temperature).

(B)...The position exiting from (A) through the first heat exchanger 8a (heat exchange-cooling).

(C)...The position exiting from (B) through the second heat exchanger 8b (heat exchange-cooling).

(D)...The position exiting from (C) through the evaporator 2 (
cooling).

(E)...The position exiting from (D) through the second heat exchanger 8b (heat exchange - heating).

(F)...The position exiting from (E) through the first heat exchanger 8a (heat exchange-heating).

(G)...The part W that exited from (F) through the heater 3a
(Warming).

(, H)...The position exiting from (F) through the auxiliary heater 8 (adjusted and heated to the target internal temperature).

(Note) 1. Prior inventions (Fig. 2, Fig. 5) are (B), (E
) is missing.

(Note) 2. The above is when there is no load, that is, when there is no moisture-containing material to be dried in the refrigerator.

As described below, put the items to be dried in the refrigerator. When a load is applied, the function of the refrigerator Naturally, it depends on the force, the size of the storage body, etc. The numbers will change.

(ii)...The graphs in Figures 6, 7, and 8 are drawn in order to clearly understand the differences between the present invention (Figure 4) and the prior invention (Figure 5). Body temperature is 40"C16
This is a comparison of the cases of 0°C and 80°C, which clearly shows the difference in temperature drop during heat exchange between the two cases.

This temperature difference is the cause of the difference in internal humidity in Figure 10 and the difference in dehumidification amount in Figure 11, and the device of the present invention has a much higher dehumidification rate than the previous device. This proves that the product has drying ability.

(iii)...Figure 9 shows, as a load example,
In the apparatus according to the embodiment of the present invention, a piece of blanket (for example, 10×l
The temperature, humidity, and dehumidification inside the refrigerator when 100 kg of water absorbing needles (10 sheets of Q cm) are soaked with water and are arranged almost evenly on a shelf in the drying room 14. Amount of water (amount of water that drains condensed water droplets from the drain pan 13 to the outside of the refrigerator during the cooling action of the evaporator 2 and the second heat exchanger 8b)
It is a graph showing the change over time.

In this case as well, the temperature of the air returned to the refrigerator through the heater 3a and the auxiliary heater 1B is around 80°C, but the material to be dried (
The temperature of the refrigerator dropped when it touched the water-containing blanket, and at the time the graph was displayed, the temperature inside the refrigerator was around 40°C. However, when the material to be dried is completely dehumidified and dried (approximately 20 hours have elapsed), the temperature reaches 70 to 80°C.

(iv)...Figure 10 is a graph comparing the decrease in internal temperature over time between the present invention and the previous invention in the above load example, and Figure 11 is a graph showing the decrease in the amount of dehumidification over time. It is a graph showing a comparison of groups A and H over time.

This shows that, as described in item (11) above, the difference in heat exchange ability between the two heat exchangers directly manifests itself as a decrease in humidity, that is, an increase in the amount of dehumidification.

In the apparatus of the present invention, moisture in the air is condensed and removed as water droplets in the second heat exchanger 8b and condenser 2, and heat exchange is not performed in the first heat exchanger 8a. Although it is effective, the water removal action is not very effective. This is considered to be because the temperature of the air that immediately enters the first heat exchanger 3a from inside the refrigerator is too high.

From this, it can be seen that since the previous invention used only one heat exchanger, it was not possible to exhibit a sufficiently effective heat exchange action, especially a dehumidifying action. This clearly demonstrates the effectiveness of having a two-stage heat exchanger arrangement, the first and second stages.

(V)...Figure 12 numerically represents the difference in the amount of dehumidification between the present invention and the prior invention shown in Figure 10 of the section (G), and the average increase rate is approximately 7%. Become.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of the device of the present invention, FIG. 2 is an explanatory diagram of the configuration of the prior invention device, FIG. 3 is a vertical cross-sectional view of the embodiment of the device of the present invention, and FIG. 1 and 3), FIG. 5 is a graph showing temperature changes at each position in the device according to the embodiment of the prior invention (FIG. 2), and FIGS. 6, 7, and Figure 8 is a graph comparing the cases of internal temperature 40'C, 60 °C and 80 °C in Figures 4 and 5, and Figure 9 is a graph when a load is applied to the apparatus according to the present invention. Figure 10 is a graph comparing the changes over time in the refrigerator humidity of the present invention and the previous invention in the load example, and Figure 11 is the same ( Fig. 12 is a table that numerically represents the difference in the amount of dehumidification between the present invention and the previous invention.Symbols: 1...Refrigerating machine compressor, 2... ...Evaporator 3
... Condenser, 3a ... Heater, 3b ... Auxiliary condenser, 4 ... Door, 5 ... Heat insulation panel, 6
... Storage body, 7 ... Housing, 8a ... First heat exchanger, 8b ... Second heat exchanger, 9 ... Intake port, 10a, 10b ...・Vent passage, 11...Exhaust port, 12...Intake fan, 13...Drain pan, 14...Drying room, ]5...Perforated plate, 16...
...Ventilation duct, 17...Recirculation fan, 1B...
Assistance. Figure 6 Temperature inside the refrigerator 40' C C ■ ◎ @ 0 ■ 0 Invention -111111 earlier invention □ Figure 7 Temperature inside the refrigerator 60' C C ■ ◎ ■ ■ ■ 0 The present invention --- −−−− First invention□? 881882 and Asahi mail mysterious mail 0

Claims (1)

[Claims] (1) This is a drying method that uses various types of refrigerators with existing configurations to dehumidify the air inside the warehouse containing the items to be dried, thereby drying the items to be dried. With the air intake or air supply means,
The air passed through the heat exchanger → evaporator (cooler) → same heat exchanger → heater, and the air inside the high-temperature, high-humidity chamber was exchanged with heat through the heat exchanger, and the temperature was lowered to the appropriate temperature for the refrigeration function. Later evaporator (cooler)
The air that has been cooled and dehumidified through this evaporator (cooler) is passed through the heat exchanger for heat exchange (the temperature of the high-temperature, high-humidity chamber air is lowered with the cooled and dehumidified air, and the air is cooled and dehumidified through the evaporator (cooler). A heat exchange action is performed to heat the cooled dehumidified air that has passed through the cooler) with the high-temperature, high-humidity air inside the refrigerator.The heated air is then raised to the desired temperature inside the refrigerator through the heater, and then returned to the inside of the refrigerator. In the drying device, the drying material stored in the refrigerator is dried by the above-mentioned air circulation. A part of the air is sent to the first heat exchanger → second heat exchanger → evaporator (cooler) → second heat exchanger → first heat exchanger → heater using an appropriate intake or air supply means. A drying device configured to pass through and return to the inside of the refrigerator.