JPH05245331A - Dehumidifier - Google Patents

Abstract

PURPOSE:To uniformly dehumidify a space to be dehumidified by blowing the air sucked from an air suction port by the rotation of a turbulence blade through an evaporator from the periphery of a condenser. CONSTITUTION:When a turbulence blade 15 on a disk 16 is turned by the rotation of a motor 17, air is driven by centrifugal force and flows in from an air inflow opening 16a, flowing on a heat transfer surface 11a from the inside to the outside. Since the distance (s) from the end surface 15a of the turbulence blade 15 and the heat transfer surface 11 a is smaller than the thickness of a temp. boundary layer, the thickness of a part where air changes in temp. when heat is transferred from the heat transfer surface 15a to the air, the turbulence blade 15 crosses the temp. boundary layer by the rotation of the turbulence blade 15 to disturb the air flow near the heat transfer surface 15a, causing a heat transfer rate to be increased. When first air flowing in from the air inflow opening 16a is passed through the heat transfer surface 11a of an evaporator 4 of a heat transfer body 11, it is deprived of heat to be lowered in temp. and moisture included in it is condensed to lower its absolute humidity. Next when the air is passed through the heat transfer surface 11a of a condenser 2 part, contrary to the above, it takes heat to be heated, lowering its relating humidity and it is blown from the periphery of a condenser 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a dehumidifier equipped with a refrigeration cycle.

[0002]

2. Description of the Related Art FIG.
It is a conventional dehumidifying device shown in Japanese Patent Publication No.
Reference numeral 1 is a compressor, 2 is a plate fin tube type condenser, 3 is a throttle device, 4 is a plate fin tube type evaporator, etc., and a refrigerating cycle 6 is constituted by sequentially connecting these by a refrigerant pipe 5. ing. Reference numeral 7 is a dew tray arranged below the evaporator 4, and 8 is a blower for blowing air from the evaporator 4 to the condenser 2 as indicated by a solid arrow.
The dehumidifying device 9 is composed of these 6 to 8.

Next, the operation will be described. The high-temperature and high-pressure gas refrigerant discharged from the compressor 1 is introduced into the condenser 2,
Here, heat is exchanged with the air blown by the blower 8 to radiate heat and condense to become a high-temperature and high-pressure liquid refrigerant, which reaches the expansion device 3. Here, the pressure is reduced to become a low-temperature low-pressure liquid refrigerant, and the evaporator 4
At this time, heat is exchanged with the air blown by the blower 8 to evaporate and become a low-temperature low-pressure gas refrigerant, which returns to the compressor 1 and the cycle is repeated. On the other hand, the air blown by the blower 8 in the direction of the solid arrow is cooled by exchanging heat with the liquid refrigerant when passing through the evaporator 4. By this cooling, the moisture contained in the air is condensed and the absolute humidity is lowered. When the air whose absolute humidity has decreased is exchanged with the high temperature high pressure gas refrigerant when passing through the condenser 2, it is heated and the relative humidity decreases. The air whose relative humidity has decreased is returned to the dehumidifying space by the blower 8, and the air in the dehumidifying space is gradually dehumidified by the circulation of this air.

[0004]

FIG. 6 is a schematic diagram showing the heat transfer form of the heat transfer body 10 such as the condenser 2 and the evaporator 4 in the conventional dehumidifying apparatus configured as described above. , The air driven by the fan 8 flows on the surface of the heat transfer surface 10a as shown by the dotted arrow in the figure, and the heat transfer surface 1a
The heat of the heat transfer surface 10a is transferred to the air by the convective heat transfer between the air and the air, so that the convective heat transfer coefficient is small and thus a large heat transfer area is required, and the fan and the heat transfer body are separated from each other. Therefore, there has been a problem that the volume of the device is increased. Further, there is a problem that it is difficult to uniformly dehumidify the dehumidifying space because the air is blown out in one direction.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a dehumidifying device which is small and lightweight, and which can dehumidify the dehumidifying space uniformly.

[0006]

In the dehumidifying apparatus according to the present invention, a condenser is arranged on the outer peripheral portion of the evaporator, and the disturbance blades that rotate in the vicinity of the evaporator and the condenser, and the disturbance. An air inlet is provided at the center of rotation of the blade or at the center of the evaporator, and the air sucked from the air inlet by the rotation of the disturbing blade is blown out from the outer periphery of the condenser through the evaporator. Is.

[0007]

In the dehumidifier of the present invention, the disturbing blades rotating in proximity to the heat transfer surface cross the temperature boundary layer on the heat transfer surface, so that the air flow near the heat transfer surface is disturbed and the heat transfer coefficient is increased. Is improved. Further, since the dehumidified air is blown out from around the condenser, the dehumidifying space is uniformly dehumidified.

[0008]

【Example】

Example 1. The block diagram of the dehumidifier according to the embodiment of the present invention shown in FIG. 1 will be described below. As shown in FIG. 3 which is a plan view shown in FIG. 2 and a sectional view taken along the line III-III in FIG. 2, 11 is an evaporator 4 which is formed by spirally forming a refrigerant flow passage 13 inside a disk 12. , A heat transfer body composed of a condenser 2 formed by spirally forming a refrigerant flow passage 14 so as to surround the evaporator 4 inside the disk 12, and 15 is a plan view of FIG. As shown in the side view of FIG. 4 (b), a plurality of plate-shaped disturbing blades are radially arranged on a disk 16 having an air inlet 16a in the center thereof and vertically planted on the disk 12. Reference numeral 17 is a motor for rotating the disk 16, 17 is an air outlet, and s is the disturbing blade 1.
The distance between the tip surface 15a of No. 5 and the heat transfer surface 11a of the heat transfer body 11 is set to be smaller than the rising point at which the slope of the increase in the convective heat transfer coefficient due to the decrease in the distance rises. In this case, it is about 0.1 mm and is formed by the method described below. As shown in FIG. 5, the tip portion 15b of the disturbing blade 15 is made of a fluororesin which is easily worn, in this case KYNA.
It is made of R (trade name of Penwalt, USA) (PVDF = vinylidene difluoride resin). The solid line arrow in FIG. 1 indicates the heat transfer direction, the broken line arrow indicates the air flow, and the double line arrow in FIG. 5 indicates the rotation direction of the disc 16, that is, the disturbing blade 15. 6
Is a refrigeration cycle constituted by sequentially connecting the above 1 to 4 with a refrigerant pipe 5.

Next, the tip portion 15a of the disturbing blade 15 and the heat transfer surface 1
A method of forming the gap s between the 1a will be described. As shown in the schematic explanatory view of FIG. 5, the disc 16 is attached to the heat transfer surface 11a with the disturbing blade 15 in contact with the heat transfer surface 11a, and the disc 16 is rotated to connect the disturbing blade 15 and the heat transfer surface 11a. When the abutting portions of the disturbing blades 15 are rubbed with each other, the tip portions 15b of the disturbing blades 15 are made of a material that easily wears, so that they wear, and as a result, a gap s is formed between the heat transfer body 11 side end of the disturbing blades 15 and the heat transfer surface 11a. Is formed.

Next, the operation will be described. Since the operation on the refrigeration cycle is the same as the conventional one,
The description thereof is omitted, and the operation of the heat transfer body 11 will be described here. When the disturbance blade 15 on the disk 16 is rotated by the rotation of the motor 17 in FIG. 1, the air is driven by the centrifugal force, and the air inlet 16 as shown by the dotted arrow in the figure.
It flows in from a and flows on the heat transfer surface 11a from the inside to the outside. The distance s between the tip surface 15a of the disturbing blade 15 and the heat transfer surface 11a is smaller than the temperature boundary layer, which is the thickness of the portion where the temperature of the air is changing when heat is transferred from the heat transfer surface 15a to the air. Due to the rotation of the blades 15, the disturbing blades 15 cross the temperature boundary layer, and the air flow near the heat transfer surface 15a is disturbed to improve the heat transfer coefficient. Further, the air that has flowed in from the air inlet 16a is deprived of heat when it first passes through the heat transfer surface 11a of the evaporator 4 of the heat transfer body 11 and its temperature drops, and the moisture contained in the air condenses and the absolute humidity increases. Decreases, and when it next passes through the heat transfer surface 11a of the condenser 2, the heat is absorbed by the heat and the relative humidity decreases. The air whose relative humidity has decreased is the condenser 2
Is blown into the dehumidifying space from the outer circumference. The air in the dehumidifying space is gradually dehumidified by this circulation of air.

Embodiment 2. In the above embodiment, the air inlet 16a provided at the center of the disk 16 is described.
Not limited to this, for example, the air inlet may not be provided in the disc 16 and the air inlet may be provided in the central portion of the heat transfer body 11, and the air inlet may be provided in both the disc 16 and the heat transfer body 11. The air may be introduced from both of the air inlets, and the same effect can be obtained.

Embodiment 3. In the above embodiments, the refrigerant flow passages 13 and 14 are spirally formed in one disk 12, and the condenser 2 is formed so as to surround the evaporator 4 and its periphery. Not only
For example, the refrigerant flow pipes are spirally arranged on the same plane to form the evaporator 4, and the refrigerant flow pipes are spirally arranged so as to surround the periphery of the evaporator 4 to form the condenser 2. The heat transfer body 11 may be configured by these, and the same effect can be obtained.

[0013]

As described above, according to the present invention, the condenser is arranged on the outer peripheral portion of the evaporator, and the disturbing blades rotating near the evaporator and the condenser are provided, and the central portion is provided. Since the air flowing in from the surroundings of the condenser is blown out through the evaporator, the turbulence of the air in the vicinity of the heat transfer surfaces of the evaporator and the condenser is increased by the disturbing blades, and the convective heat transfer coefficient is increased. And the heat transfer area is small, and the device can be made compact and lightweight. Further, since the dehumidified air is blown out in the radial direction, there is an effect that the dehumidifying space can be uniformly dehumidified.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a dehumidifying device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a heat transfer body shown in FIG.

3 is a sectional view taken along line III-III in FIG.

4 shows a state in which the disturbing blade shown in FIG. 1 is attached to a disc, FIG. 4 (a) is a plan view thereof, and FIG. 4 (b) is a side view thereof.

FIG. 5 is a schematic explanatory view illustrating a method of forming a gap between the tip surface of the disturbing blade shown in FIG. 1 and the heat transfer surface of the heat transfer body.

FIG. 6 is a configuration diagram showing a conventional dehumidifier.

7 is a configuration diagram schematically showing a heat transfer form of the condenser and the evaporator shown in FIG.

[Explanation of symbols]

 1 Compressor 2 Condenser 3 Throttling device 4 Evaporator 5 Refrigerant piping 6 Refrigeration cycle 11 Heat transfer body 11a Heat transfer surface 15 Disturbing blade 16a Air inlet

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Yoshida 6-566 Tehira, Wakayama City Wakayama Works, Mitsubishi Electric Corporation (72) Inventor Yasufumi Hatamura 6-566 Tehira, Wakayama Mitsubishi (72) Inventor Tetsuro Ogushi 8-1-1 Tsukaguchihonmachi, Amagasaki City Central Research Laboratory, Mitsubishi Electric Corporation

Claims (1)

[Claims] 1. A refrigeration cycle comprising a compressor, a condenser, a throttling device, and an evaporator, which are sequentially connected by a refrigerant pipe, wherein the condenser is arranged on an outer peripheral portion of the evaporator. In addition, a disturbing blade that rotates near the evaporator and the condenser, and an air inlet at the center of rotation of the disturbing blade or at the center of the evaporator are provided. A dehumidifying device characterized in that air flowing in from an inlet is blown out from the outer periphery of the condenser via the evaporator.