JPH11197395A - Dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten drying time, reduce energy consumption and prevent the environment of a room where a dryer is installed, from deteriorating, by introducing dry air that is dehumidified by an evaporator of a refrigeration cycle and heated by a condenser, into a drying drum where things to be dried are stored. SOLUTION: An evaporator 40 that cools and dehumidifies air sequentially from the upstream side of an air course 30 in a casing 20, a condenser 50 that heats air, a drying drum 60 that stores a thing W to be dried, a blower 70 that blows air toward the downstream side of the air course 30, are arranged. In the casing 20, an air circulating air course that connects continuously the downstream side of the blower 70 with the upstream side of the evaporator 40 is provided, and the flow of air flowing down in the drying drum 60 is circulated through the air course 30. A openable door 110 is provided downstream the blower 70 of the casing 20 and opens when a temperature sensor 120 senses a temperature higher than a prescribed value and discharges air in the air course 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dryer using a high-temperature air blown from a condenser of a refrigeration cycle as a heat source.

[0002]

2. Description of the Related Art Generally, a drier uses an electric heater or a gas heater as a heat source, sends high-temperature air blown from such a heat source to a drying drum containing a material to be dried, and dries the material to be dried. I have.

The high-temperature air supplied for drying is discharged to the outside of the dryer or discharged outside through a duct.

[0004]

However, in this dryer, since the air sent into the drying drum is not dehumidified, a high-humidity air is used.

[0005] For this reason, it takes a long time for the material to be dried to dry. As a result, there is a problem that the energy consumption is large and the electricity bill increases.

[0006] In addition, since the exhaust air after drying the material to be dried is often blown out indoors, the temperature and humidity in the room where the dryer is installed may rise, and the indoor environment may be deteriorated. If the point is improved and the exhaust is discharged to the outside through the duct, the duct is required, and there is a problem that the equipment cost increases.

[0007] In particular, in ordinary households, a dryer is often installed adjacent to a bathroom. In such a case, when the dryer is operated, the dryer is installed together with the heat and humidity of the bathroom. There is a possibility that the environment of the room that has become degraded.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides a drier capable of shortening the drying time, reducing energy consumption, and preventing the environment of a room in which the drier is installed from being deteriorated. The purpose is to provide.

[0009]

The object of the present invention is achieved by the following means.

(1) A refrigerating cycle includes a compressor, a condenser, an expansion valve, and an evaporator, and the dry air dehumidified by the evaporator and heated by the condenser is introduced into a drying drum in which a material to be dried is stored. A dryer characterized in that:

(2) The dryer is characterized in that the drying drum is disposed in an air passage of a casing provided with a blower fan, and the evaporator and the condenser are provided upstream of the drying drum.

(3) The dryer is characterized in that the drying drum is constituted by a perforated plate and is rotatably installed in an air passage.

(4) The dryer is characterized in that the casing is provided with an air circulating air passage for returning an air flow flowing down the drying drum to an upstream side of the evaporator.

(5) The refrigeration cycle has a first evaporator and a second evaporator, and the second evaporator further cools the refrigerant flowing down the first evaporator. Drying machine.

(6) The dryer is characterized in that the first evaporator and the second evaporator are arranged outside the casing.

(7) The dryer is characterized in that the casing has a door which is opened when a temperature sensing member provided in the air passage senses a predetermined temperature or higher.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. << 1st Embodiment >> FIG. 1: is a schematic block diagram of the dryer which concerns on 1st Embodiment, FIG. 2: shows the psychrometric chart in the said dryer.

The dryer 10 according to the present embodiment is used for drying an object to be dried W such as laundry, for example, as shown in FIG. In order from the side, an evaporator 40 for cooling and dehumidifying air, a condenser 50 for heating air,
A drying drum 60 for storing the article to be dried W and a blower fan 70 for blowing air toward the downstream side of the air passage 30 are provided.

In the casing 20, a blower fan 7 is provided.
An air circulating air passage 30a for connecting the downstream side of the drying drum 60 to the upstream side of the evaporator 40 is provided.
The air flow (open arrow) flowing down the air circulation air passage 3
Oa is configured to circulate in the air passage 30.

A drain 90 for discharging drain water dropped from the evaporator 40 is provided below the casing 20, and a drain hose 100 is connected thereto.

An openable / closable door 110 is provided in the casing 20 downstream of the blower fan 70. The door 110 is opened when the temperature sensor 120 senses a predetermined temperature or higher, and discharges the air in the air passage 30 to the outside to ensure safety.

However, the door 110 is closed during normal operation, so that the air in the air passage 30 is recirculated through the air circulation air passage 30a.

It is preferable that the drying drum 60 is constituted by a perforated plate or a plate having a large number of slits, and is rotatable by a driving means such as a motor. By doing so, the drying of the object to be dried W stored in the drying drum 60 can be further promoted.

The evaporator 40 and the condenser 5
0 is connected via a pipe P to form a normal refrigeration cycle, as shown in FIG. In this refrigeration cycle, the refrigerant compressed by the compressor 140 is condensed by the condenser 50, flows into the expansion valve 160 via the liquid tank 160, is expanded there, is further evaporated by the evaporator 40, and then is charged by the accumulator 15.
The signal is returned to the compressor 140 through 0.

Next, the operation will be described. First, the material to be dried W
When the operation of the dryer 10 is started in a state in which is stored in the drying drum 60, the blower fan 70 rotates, the compressor 140 is activated, and the refrigerant circulates during the refrigeration cycle.

The rotation of the blower fan 70
An air flow is created in the air passage 30 of the first embodiment, and this air flow circulates through the air circulation air passage 30a.

On the other hand, in the refrigeration cycle, the compressor 1
The high-temperature and high-pressure refrigerant discharged from 40 is guided to the condenser 50 through the pipe P, where the high-temperature refrigerant and the air flow exchange heat, the refrigerant is condensed, and the air is heated.

This refrigerant is expanded by the expansion valve 160 through the liquid tank 160, becomes a low-temperature low-pressure refrigerant, and is guided to the evaporator 40. In this evaporator 40,
The low-temperature refrigerant and the air flow exchange heat, the refrigerant evaporates, and the air is cooled and dehumidified to lower the relative humidity.

Therefore, the low-humidity air flow cooled and dehumidified by the evaporator 40 is heated by the condenser 50 through the air passage 30. The air flows into the drying drum 60, and the object to be dried W in the drying drum 60 is dried very efficiently.

That is, in the psychrometric chart shown in FIG. 2, the air in the state A at the temperature (a ° C.) and the absolute humidity (b%) after being dehumidified by the evaporator 40 is heated by the condenser 50 to be in the state B. It becomes air and is sent into the drying drum 60.

This air removes the moisture of the material W to be dried, and becomes air in the humid C state.
It is blown out from zero.

The air in the humid state C is guided to the evaporator 40 through the air circulating air passage 30a. If the temperature drop when circulating through the air circulating air passage 30a is ignored, FIG. Is cooled and dehumidified along the arc-shaped line shown in FIG.
0, and flows into the drying drum 60 to be dried W
For drying.

Here, the water evaporated from the material to be dried W is:
The drain hose 10 is turned into drain water by the evaporator 40.
Exhausted through 0.

Therefore, since the drying air is always circulated and introduced into the drying drum 60, the material to be dried W is dried very efficiently, and the humidity in the room where the dryer 10 is installed does not increase. .

<< Second Embodiment >> FIG. 3 is a schematic configuration diagram of a dryer according to a second embodiment of the present invention, and FIG. 4 is a psychrometric chart of the dryer.

As shown in FIG. 3, the dryer 10A according to the second embodiment includes the dryer 1 according to the first embodiment described above.
0, the evaporator 40 in the refrigeration cycle
A different point is that a second evaporator 40a is provided on the downstream side of the dryer, and other configurations are the same as those of the dryer 10 according to the above-described first embodiment. Therefore, the same members as those of the dryer 10 according to the above-described first embodiment are denoted by the same reference numerals, and detailed description is omitted.

In the dryer 10A according to the second embodiment, a second evaporator 40a is provided downstream of a first evaporator 40 provided outside the casing 20.
The second evaporator 40a is provided with an air blower fan 200 for blowing air, and the second evaporator 40a absorbs more heat than the outside air. It will be able to release more.

According to the dryer 10A, as shown in the psychrometric chart of FIG. 4, the air in the initial A state is heated in the condenser 50 as in the dryer 10 according to the first embodiment. This air is in a state B ′ where the temperature is higher than the state B, and higher-temperature air is sent to the drying drum 60. This air removes the moisture of the object to be dried W,
Although it is in a humid state, it is blown out from the drying drum 60 as C 'state air having a higher temperature than the C state air.

In this case as well, if the temperature drop during the circulation in the air circulation air passage 30a is ignored, both evaporators 4
The air is dehumidified while being cooled by 0, 40a, and becomes air in the A state from the C 'state along the dashed-dotted circular arc line shown in FIG. 4, is heated again by the condenser 50, flows into the drying drum 60, and has a further efficiency. It is often used for drying the object to be dried W.

When the temperature sensor 120 senses a predetermined temperature or higher, the door 110 is opened, air flows in from the outside, and the temperature of the air flow in the air circulation air passage 30a rapidly decreases. .

The present invention is not limited to the above-described embodiment, but can be variously modified and used within the scope of the claims. For example, in the above embodiment, the object to be dried W is laundry such as clothes, but the present invention
The present invention is not limited to this, and can be used for drying cereals or other items. Also,
In the above-described embodiment, a dryer using only a refrigeration cycle is used, but an electric heater or a gas heater may be used as an auxiliary heat source.

[0042]

As described above, according to the first aspect of the present invention, since the object to be dried is dried by the dry air dehumidified by the evaporator and heated by the condenser, the drying time is shortened. In addition, efficient drying with less energy consumption is possible, and the environment of the room where the dryer is installed does not deteriorate.

According to the second aspect of the present invention, since the blower fan is provided in the air passage of the casing, the drying can be performed more efficiently.

According to the third aspect of the present invention, since the drying drum of the perforated plate is rotatably provided in the air passage, the heated air flows through the drying drum and the dried material inside the drying drum is dried. And more efficient drying becomes possible.

According to the fourth aspect of the present invention, since the air circulating air passage is provided in the air passage of the casing, the heated air can be circulated and used, so that the drying time is further reduced, and the energy consumption is reduced. Efficient drying with a small amount is possible.

According to the fifth aspect of the present invention, since heat is absorbed using the first and second evaporators, it is possible to heat and dry with higher temperature air.

According to the sixth aspect of the present invention, since both evaporators are provided outside the casing, drying can be performed more efficiently by absorbing heat from outside air.

According to the seventh aspect of the present invention, since the temperature sensing member is provided in the air passage to open the door, the object to be dried can be dried safely.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a dryer according to a first embodiment of the present invention.

FIG. 2 is an air line diagram in the dryer according to the embodiment.

FIG. 3 is a schematic configuration diagram of a dryer according to a second embodiment of the present invention.

FIG. 4 is an air line diagram in the dryer according to the embodiment.

[Explanation of symbols]

 10, 10A: dryer, 20: casing, 30: air path, 30a: air circulation air path, 40: first evaporator, 40a: second evaporator, 50: condenser, 60: drying drum, 70: blowing fan Reference numerals 110, door, 120, temperature sensor, 140, compressor, 170, expansion valve.

Claims (7)

[Claims] A compressor (1) constituting a refrigeration cycle
40), condenser (50), expansion valve (170) and evaporator
(40), dry air dehumidified by the evaporator (40) and heated by the condenser (50) is dried.
A dryer characterized in that the dryer (W) is introduced into a drying drum (60) in which it is stored. 2. The drying drum (60) includes a blowing fan (70).
Is disposed in the air path (30) of the casing (20) provided with
The said evaporator (40) and the condenser (50) were installed in the upstream of the said drying drum (60).
The dryer according to item 1. 3. The dryer according to claim 1, wherein the drying drum (60) is formed of a perforated plate, and is rotatably installed in the air passage (30). 4. The casing (20) is provided with the drying drum.
The dryer according to claim 2 or 3, further comprising an air circulation path (30a) for returning an air flow flowing down the (60) to an upstream side of the evaporator (40). 5. The refrigeration cycle has a first evaporator (40) and a second evaporator (40a).
The dryer according to any one of claims 1 to 4, wherein the evaporator (40a) further cools the refrigerant flowing down the first evaporator (40). 6. The dryer according to claim 5, wherein the first evaporator (40) and the second evaporator (40a) are arranged outside the casing (20). 7. The casing (20) has a door (110) that is opened when a temperature sensing member (120) provided in the air passage (30) senses a predetermined temperature or more. The dryer according to any one of claims 2 to 6.