JPS60215398A - Dryer - 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 [Technical Field of the Invention] This invention relates to a dryer that circulates hot air through a drying chamber and pressurizes it to dry clothes and the like.

[Conventional technology]

Figure 1 is a sectional view showing a conventional dryer shown in, for example, JP-A-57-58064. In the figure, (1) is an outer box, and (2) is a rotatable machine inside the outer box (1). It is a rotating drum with a drying chamber inside, and the rear plate (2b) is pivoted at the approximate center to the support plate (4) via a pivot (3), and the front plate (2a) is used for loading and unloading of dried materials. An opening (5) is formed. (6) (7) are hot air inflow and outflow holes opened in the front plate (2a) and rear plate (2b) of the rotating drum (2), respectively;
The support plate (4) covers the group of inflow holes (6) from the rear.
), (9) is the fan casing connected to this Namikaze case via the air supply duct aQ, (
(b) is a circulation fan installed inside the fan casing, (2) is a heater installed inside the air supply duct aQ,
A4 is an annular exhaust case installed to cover the outflow holes (7) on the front surface of the rotating drum (2) from the front, and a4 is a dehumidifier installed below this exhaust case. Inside the flat plastic outer casing (which is partially opened for ventilation), there are air passages for cold air connected to the openings on both left and right walls, and a large number of cooling fins a. A plurality of ventilation pipes (protruding from the windshield) are inserted vertically into the air passage (6), and the inside of the ventilation pipe αη is used as an air passage (b) for hot air. (to) is a circulation duct whose one end is connected to the lower opening of the outer casing (2) and the other end is connected to the air intake port (9a) of the fan casing (9).

(to) is a drain hole formed at the bottom of one end of the circulation duct (to), g is an electric motor that rotates the rotating drum (2) via a belt Department (
5) The door that opens and closes is a time switch.

A conventional dryer is constructed as described above, and has two rotating drums (2
) When the material to be dried is stored in the chamber and the time switch is set, the heater (2) and the electric SW are energized, the heater (6) generates heat, and the electric motor rotates, which drives the rotating drum (2) and the circulation drum. A fan (b) and a cooling fan (not shown) are rotationally driven. As a result, an air stream is formed by the circulation fan (b), and while it flows through the air supply duct (2), it is heated by the heater (2) and turned into hot air, and then passed through the Namikaze case (8). The air is blown into the rotating drum (2), removes moisture from the material to be dried, lowers the temperature slightly, and turns into humid warm air, which is then passed through the exhaust case (2) to the ventilation pipe (ro) of the dehumidifier (b). ). This dehumidifier (B) is cooled by outside air, so the humid hot air is cooled and condensed, moisture is removed, and it becomes dry warm air.
He is now busy returning to Fangying (9). However, as mentioned above, the power consumption increases because the heater (2) heats the circulating air, and also because the dehumidifier (α) is cooled by the outside air (generally indoor air). It is difficult to remove temperature differences, and therefore the dehumidification effect is poor and the drying time is long.

[Summary of the invention]

The present invention has been made with the aim of improving these drawbacks, and includes providing a heater for heating the air flowing through the hot air circulation air passage, and an evaporator and a condenser for the refrigeration cycle. By providing this, we propose a dryer with high dehumidification efficiency of circulating humid warm air and high heat utilization efficiency.

[Embodiments of the invention]

FIG. 2 is a cross-sectional view showing one embodiment of the present invention, CI
p is the outer casing, and the front side has an opening (2) to open and close the material to be dried;
A discharge port (2) for discharging indoor air is provided at the bottom. The shaft is a rotary drum that is rotatably installed inside the outer casing and has a drying chamber (86a) inside.The back side has a hot air inlet (b), and the front side has a hot air inlet and outlet for drying materials. Each outlet is provided with an outflow port. Zeng is a hot air circulation duct with one end connected to the inlet (B) and the other end connected to the outlet side wall opening, and ... is a hot air circulation for blowing air installed inside this hot air circulation duct. The θ force is an electric motor that rotates this hot air circulation fan, and a pulley is provided on its shaft to rotate the rotating drum (2) via the shaft. ing. The ring is a compressor, 2) is a plate-fin type condenser, 2) is a capillary, and 2) is a plate-fin type evaporator, and these are compressed! A refrigeration cycle is formed by a), a condenser), a cabin refrigerator), and an evaporator. The inside of the wind circulation ventilation passage is formed to function as a drain recovery section, and the warm air circulation ventilation passage (to) button at the bottom thereof is provided with a drain drainage row. The ring is a heat exchanger installed on the downstream side of the hot air circulation duct (to the condenser), and is heated by a combustor (2) of gas, etc. installed outside the hot air circulation duct. Ru. Note that the arrow in the figure indicates the direction of air blowing.

The dryer configured as described above stores the material to be dried in the rotating drum and sets the time switch (not shown) to the electric motor (S), compression Ill) and combustor.
is operated, the condenser is heated by the refrigeration cycle, the heat exchanger (2) is heated by the combustor, and hot air is supplied into the drying room (86&) by the hot air circulation fan. . This hot air and the rotation of the rotating drum remove moisture from the dried material.

The warm air is slightly lowered in temperature and becomes humid warm air), flows through the hot air circulation ventilation duct) to the evaporator, and touches the surface of the evaporator cooled by the refrigeration system. The water condensed and removed from the dried material is removed, and the water is drained from the drain row and dried with low-temperature air, heated again with a condenser θΦ and a heat exchanger, and supplied to the drying chamber (86B). By heating the circulating air in this manner, the warm air reaches a predetermined value and the combustor υ is turned off.

When the temperature of the circulating air becomes low, it is turned on again, and the time it takes to reach a predetermined temperature is short, and the heat is absorbed by the condenser (in the condenser), increasing thermal efficiency. Such a cycle is repeated to gradually dry the material to be dried, and after a predetermined period of time, the time switch is turned off and the operation is completed.

In addition, in the above embodiment, the hot air circulation air path (2) K heat exchanger -
Although the heat is heated by a combustor installed externally, the same effect can be obtained by installing a combustor inside the hot air circulation passage as shown in Figure 8. However, in this case, it is necessary for K to provide an exhaust gas discharge row and a combustion air supply row. Also, the heat exchanger...
A similar effect can be obtained even if the upper level is lower.

〔Effect of the invention〕

As described above, the present invention includes a drying room, a hot air circulation air passage provided through the drying room, a warm air circulation fan provided on the hot air circulation air passage, and a hot air circulation fan provided in the hot air circulation air passage. A refrigerated psychedelic device is provided with an evaporator and a condenser provided in a ventilation path, the evaporator is provided upstream of the condenser, and the warm air circulation ventilation path is provided downstream of the condenser. By installing a heater that heats the air that is being dried, the evaporator can reliably condense the moisture taken away by the material to be dried and drain it as a drain, making it possible to constantly supply dry warm air. Drying time becomes shorter.

In addition, since heating and dehumidification are performed by the refrigeration cycle, heat utilization efficiency is high, and the heater can raise the temperature in a short time.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional example, FIG. 2 is a sectional view showing one embodiment of the present invention, and FIG. 8 is a sectional view showing another embodiment of the invention. In addition, the same reference numerals in each figure indicate the same or equivalent parts.
86a) is a drying room, (to) is a hot air circulation air passage, a ring is a fan for hot air circulation, 2) is a condenser, 86a is an evaporator, 1 is a heat exchanger, and 86a is a combustor. Agent Masuo Oiwa Figure 1

Claims (1)

[Claims] (1) A drying chamber, a hot air circulation duct provided through the drying room, a hot air circulation fan provided in the hot air circulation duct, and a hot air circulation fan provided in the hot air circulation duct; A refrigeration cycle includes an evaporator and a condenser provided in a ventilation passage, the evaporator being provided upstream of the condenser, and air flowing through the hot air circulation ventilation passage downstream of the condenser. A dryer characterized by being equipped with a heater for heating. (2) The dryer according to claim 1, wherein the heater is a combustor and is provided in a hot air circulation path. (8) The dryer according to claim 1, wherein the heater is a combustor and is configured to heat a heat exchanger provided in the hot air circulation passage. (4) Heater! The dryer according to claim 1, wherein the dryer is an air heater.