JPH012696A - dehumidifying 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] [Object of the Invention] (Industrial Application Field) The present invention is a dehumidifying and drying device that is equipped with a refrigeration cycle device and is capable of dehumidifying and drying a bathroom, etc., and also makes it possible to dry clothes hung in a bathroom, etc. In particular, the present invention relates to improvements in defrosting structures for evaporators constituting refrigeration cycle equipment.

(Prior Art) For example, in a bathroom, the windows are formed relatively small to prevent a drop in internal temperature, which makes it easy for air to leak.

Particularly during bathing, steam adheres to the bathroom walls and condenses, and remains there for a long time even after bathing. People tend to take a bath with the bathroom window completely closed or almost closed all year round, not just in the winter months when the temperature gets colder, and even if they open the window when they are not bathing. However, it takes a very long time to completely dry the inside of the bathroom. Therefore, mold easily grows in the joints of the tiles that make up the walls of the bathroom. This mold multiplies in a short period of time, turning into stains that not only spoil the appearance, but also corrode the wood that makes up the base material and foundation of the walls.

BACKGROUND ART Conventionally, a bathroom ventilation fan has been provided on the upper part of a bathroom wall. This type of ventilation fan is convenient for preventing the so-called steam exposure when you want to release the steam that fills the bathroom, although cold air enters when you open the window in low temperatures such as in winter. In other words, the ventilation fan is limited to only having a ventilation function, and since the fan diameter is small and the amount of air is small,
It does not reach the point where it completely dries the bathroom.

On the other hand, even during the so-called rainy season, if it is a rainy day or a low-temperature, cloudy day, laundry such as clothes will not dry.

During the winter, heating equipment is sometimes used to force dry the food, but this poses risks such as overheating accidents. Recently, dryers that can be integrated into washing machines have become more and more convenient, but they are not economically efficient because they use a large amount of electricity, and the dryers themselves are expensive.

Given these circumstances, we have made it possible to ventilate the bathroom as needed, such as while taking a bath, and to quickly dehumidify and completely dry the interior, while also making it possible to use this space to dry laundry, etc. A bathroom is desired.

What is considered here is the dehumidification and drying process as described below. That is, as shown in FIG. 1, reference numeral 1 denotes a bathroom, which is a so-called unit bath, located in a house LIS. When not taking a bath in the bathroom 1, or on a rainy day or a low-temperature, cloudy day, it is advisable to hang laundry items such as clothes a as shown in the figure. A dehumidifying dryer K is arranged on the ceiling 2 of the bathroom 1. The dehumidifying dryer is comprised of a main body 3 that protrudes to the back side of the ceiling 2, and a decorative frame 4 that is integrally provided on the lower surface of the main body 3 and protrudes to the inner surface of the ceiling 2. That is, the main body 3 is located behind the ceiling, and the decorative frame 4 is exposed on the ceiling surface of the bathroom 1. A ventilation duct 5 is connected to the side wall of the main body 3, and this fl! ! The end portion opens outward from the wall surface of the house S. Further, although not shown in the figure, an intake duct that opens toward the outside from the wall surface of the house S is connected to the side wall of the main body 3.

As shown in FIG. 2, the decorative frame 4 is provided with a suction lower into which the suction grille 6 is fitted, and an air outlet 9 into which the air outlet grille 8 is fitted. The suction grill 6 and the outlet grill 8 face each other in the bathroom 1. Furthermore, a ventilation duct connection port 10 to which the ventilation duct 5 is connected and an intake duct connection port 11 to which the unillustrated intake duct is connected are protrudingly provided on the side wall of the main body 3. Reference numeral 12 in the figure represents an electrical component storage box provided on the side wall of the main body 3.

The interior of the dehumidifying and drying IK is shown in FIGS. 7 and 8. That is, the inside of the main body 3 is partitioned by a partition plate 13, and also has a refrigeration cycle device 14 and a blower 15.
and are placed. The refrigeration cycle equipment 14 includes a compressor 16 disposed in one chamber 3a partitioned by a partition plate 13.
and an evaporator 17 arranged in the other chamber 3b. Tight! ? i
18 and a reduced-pressure VIR stomach (not shown here), all of which communicate via refrigerant pipes to constitute a refrigeration cycle circuit as described below. The evaporator 17
The condenser 18 and the condenser 18 are arranged facing each other with a narrow gap between them. Further, a heater 1 is installed near the condenser 18.
9 and 19 are arranged, and the above-mentioned blower 15 called a so-called sirocco fan is also arranged. The evaporator 17, condenser 18, and heater 19 are located on the suction side of the retraction [5]. Although the suction lower and the intake duct connection port 11 are provided near the evaporator 17,
It becomes the suction side of the feeder 111jl15. In addition, the air outlet 9
The ventilation duct connection port body 10 is located on the blowing side of the blower 15.

However, with laundry a... hanging in bathroom 1,
When a drying switch (not shown) is turned on, the air blower 15 is driven and the refrigeration cycle is operated. The air in the bathroom 1 is introduced into the main body 3 from the suction lower, and is then passed through the evaporator 1.
7 is conducted, the latent heat of vaporization is removed, and the air becomes dry and cool. Next, the condenser 18 is made conductive, and the heat of condensation is absorbed therefrom, thereby increasing the temperature. Eventually, the dry air returns to its original temperature and is blown out from the air outlet 9 into the bathroom 1. In the bathroom 1, moisture is removed and the bathroom 1 is dried, so that the wall surface dries quickly and the laundry items a... dry quickly as well.

When the outside air temperature is low, if the heater 19° 19 generates heat as appropriate, the heated dry air will be blown into the bathroom 1, and the wall surface and washing items a...
・Dries.

Such dehumidifying and drying IIK is very convenient because it can achieve the desired effect by 1q. However, since a refrigeration cycle is used, frost is likely to adhere to the evaporator 17, especially when the temperature is low, such as in winter. - When frost builds up, its thickness increases rapidly, impeding this heat exchange efficiency. Therefore, it is necessary to melt the frost periodically or by detecting the presence of frost. That is, a defrosting action is performed on the evaporator 17, which is generally carried out by directing high-temperature, high-pressure hot gas discharged from the compressor 16 to the condenser 17.

The refrigeration cycle circuit for this purpose is shown in FIG. That is, compression d16. Condenser 18° Pressure reducing device, Ki 17 Biraritube 20. The main refrigeration cycle circuit R sequentially communicates with the evaporator 17, and the three-way switching valve 21 installed on the discharge side of the compressor 16 branches off, has an electromagnetic on-off valve 22 in the middle, and has a capillary duplex 20. The defrosting circuit Ra communicates with the evaporator 17.

The dehumidifying and drying action for the bathroom 1 is carried out by the main refrigeration cycle circuit R.
This is possible by guiding the refrigerant along the direction indicated by the solid line arrow in the figure. Further, in order to defrost the evaporator 17, the three-way switching valve 21 is switched and the electromagnetic on-off valve 22 is opened. The operation of the i2i wind fan 15 is stopped. The refrigerant is guided along the defrosting circuit Ra, that is, as shown by the broken line arrow in the figure. The high-temperature, high-pressure hot gas discharged from the compressor 16 is directly led to the evaporator 17, where it emits heat against the frost that adheres there.

Therefore, the frost melts. When the frost in the evaporator 17 completely melts and returns to its original state, the three-way switching valve 21 is switched again and the electromagnetic on-off valve 22 is closed to return to the original refrigeration cycle operation.

Although defrosting the evaporator 17 is possible in this way, problems remain. That is, although defrosting is performed using the heat of hot gas, it takes a considerable amount of time to completely melt the frost. During this time, the dehumidifying and drying operation of the bathroom 1 cannot be performed, so the drying efficiency is poor when averaged. Moreover, as shown in FIG. 6(A), the room temperature of the bathroom 1 decreases every time the defrosting operation is performed. That is, defrosting operation is frequently performed at low temperatures such as in winter, and when dehumidifying and drying is not performed, it is easily affected by the outside temperature and the room temperature drops significantly. In order to return to the original temperature, it is necessary to switch to refrigeration cycle operation for a while after defrosting is complete. For this reason, the drying condition of the laundry a... etc. is disappointing.

(Problems to be Solved by the Invention) The present invention eliminates the problems associated with the defrosting operation of the evaporator as described above, and suppresses the decrease in room temperature during defrosting.
An object of the present invention is to provide a dehumidifying dryer 1 that can improve the drying QJ rate.

[Structure of the invention]

(Means for Solving the Problems) That is, the present invention arranges a main body that accommodates a refrigeration cycle device and a conveyor in the ceiling of a bathroom or the like, and places the evaporator and condenser constituting the refrigeration cycle device relative to each other. A suction inlet and an outlet are opened in the main body, and as the blower operates, air from a bathroom, etc. is introduced into the main body and is conducted to the evaporator and condenser in order for heat exchange. In devices that blow air back into the bathroom, etc., the evaporator can be defrosted by passing hot gas through the evaporator, and the suction air guided from the suction port into the main body is passed through the evaporator and condenser. This dehumidifying dryer is characterized in that it is equipped with a damper device and a bypass passage that leads directly to the air outlet without being guided to the air outlet, and a heating source is disposed in the middle of the bypass air passage.

(Function) By configuring in this way, the damper tjl+g
The suction air from the suction port into the main body is guided along the bypass passage. That is, the air is not introduced into the evaporator or the condenser, but directly into the air outlet, and the heating source is made to generate heat to heat the air flowing through the bypass ventilation path. Therefore, even at low temperatures, there is no drop in room wetness, and the evaporator can be quickly defrosted and returned to its original dehumidifying and drying operation.

(Example of Actual Flow) Hereinafter, an example of the present invention will be explained based on Fig. 54 and Fig. 5.The general mounting position and appearance of the dehumidifying dryer nK will be explained in Fig. 1 and Fig. 2. That's exactly what I did. Since the refrigeration cycle circuit configuration of the refrigeration cycle equipment 14 is as explained in FIG. 3, the same figure will be applied to all cases and new explanation will be omitted. Further, since the planar arrangement of the main components may be the same as that explained in FIG. 7, the same numbers will be given and new explanation will be omitted. however,
Since the lateral arrangement is partially different from that described in FIG. 8, only the different vehicles will be shown and explained. That is, as shown in FIG. 4, the evaporator 17 and the condenser 18 are disposed on the upper side of the main body 3 with their positions id shifted, and there is a certain gap between their lower surfaces and the lower surface of the main body 3. Steam J
A suction side guide plate 30 is provided at the lower part of the exhaust device 17, and a damper device 31 is provided between one end of the guide plate 30 and the suction lower.

In the state shown in FIG. 4, this damper [4R31] guides the air led from the suction lower to the evaporator 17, and the gap under the suction side guide plate 30 is closed. Further, when the damper device 31 is operated to bring the state shown in FIG. 5, the air introduced from the suction lower is guided to the lower part of the suction side guide plate 30, and the direction toward the evaporator 17 is closed. The blower 15 is also arranged on the upper side, and a blower side guide plate 32 is disposed between this and the blower outlet 9.
will be established. For this reason, the air guided from the suction lower into the main body 3 is fed to the evaporator 17. Air blower 11 via condenser 18
A ventilation passage 33 that communicates with the air blower 15 and a bypass ventilation passage 34 that communicates with the blower 15 from the suction lower through a gap below the suction side guide plate 30 are formed. These changes are made by the damper device 31. The heater 19, which is a heat source, is preferably disposed across the ventilation passage 33 and the bypass ventilation passage 34.

Therefore, when dehumidifying and drying the bathroom 1 or drying the laundry a hanging in the bathroom 1, that is, when circulating the refrigerant along the main refrigeration cycle circuit R, as shown in FIG. Air introduced into the main body 3 from the suction lower
The damper device 31 is actuated to guide along the path 33. Therefore, it does not have the same effects as before.

Further, when defrosting the evaporator 17, that is, when circulating the refrigerant along the defrosting circuit Ra, the damper device 31 is operated as shown in FIG.
The air sucked in from the suction lower is guided to 4. The heater 19 generates heat even when the temperature is not low. Hot gas is guided to the evaporator 17 to melt adhering frost, and air in the bathroom 1 guided through the bypass ventilation passage 11 is heated by the heater 19.
The water is heated by the air outlet 9 and guided to the bathroom 1 again through the air outlet 9.

Therefore, as shown in Figure 6 (B), even if defrosting is performed above the hot water, the room temperature in bathroom 1 will only decrease slightly;
Or wash it? This drying can be done quickly by blowing the heated wind onto the material.

(Effects of the Invention) As explained above, according to the present invention, there is almost no drop in room temperature during defrosting of the evaporator, and dehumidification and drying of bathrooms, etc. can be achieved in an extremely short time and reliably, and the drying efficiency can be improved. get the effect of getting.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a part of a bathroom and a house, Fig. 2 is a perspective view of a dehumidifying dryer, Fig. 3 is a configuration diagram of its refrigeration cycle, and Figs. 4 and 5 are examples of each other's inventions. 4 and 5 are schematic longitudinal cross-sectional views of the main body in different ventilation conditions, FIG. 6 (A> and (B) are room temperature characteristic diagrams during different defrosting conditions, and FIG. 8 shows a conventional example of the present invention, FIG. 7 is a schematic cross-sectional plan view of a dehumidifying dryer, and FIG.
The figure is a longitudinal cross-sectional view. 1...Bathroom, 2...Ceiling, 14...1 refrigeration cycle rim, 15...Blower, 3...Main unit, 17...
Evaporator, 18... Condenser, 7... Suction port, 9...
Air outlet, 34... Bypass ventilation path, 31... Damper opening groove, 19... Heat source (heater). Applicant's agent Patent attorney Suzue Takehato Figure 3, Figure 4

Claims (1)

[Claims] A main body housing a refrigeration cycle device and a blower is arranged in the ceiling of a bathroom, etc., an evaporator and a condenser making up the refrigeration cycle device are arranged facing each other, and an inlet and an outlet are provided in the main body. The evaporator opens and guides air from a bathroom, etc. into the main body as the blower operates, and sequentially conducts the air to an evaporator and a condenser to exchange heat, and then blows and guides the air to the bathroom, etc. defrosting is possible by passing hot gas through the evaporator, and at this time, a bypass ventilation passage and its A dehumidifying dryer comprising a damper device for guiding switching, and a heating source disposed in the middle of the bypass ventilation path.