JPS62194899A - Bathroom 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 [Purpose of the Invention (Field of Industrial Application) The present invention relates to a bathroom dryer used when a bathroom is used as a drying room for clothes.

(Prior Art) Generally, this type of bathroom dryer can be divided into the following types depending on the heat source.

(1) Those that utilize the dehumidifying effect of the refrigeration cycle.

(2) Something that uses heat generated by a heater.

(3) Items that use hot water heat.

As a device that utilizes the dehumidification effect, Utility Model Application No. 59-843
No. 23 (Fig. 7) and Utility Model Publication No. 58-142623 (No. 8)
and Fig. 9).

In FIG. 7, 1 is a bathroom and 2 is a wall. However,
A main body 3 of a bathroom dryer is provided on the inner surface of a wall 2. This main body 3 penetrates the wall 2 and extends to the outdoors, and has an inlet 4 and an outlet 5 on the front surface facing the bathroom, and an exhaust port 6 on the back surface facing the outdoor side. In the main body 3, an evaporator 7 and a condenser 8 are sequentially arranged near the suction port 4.

Furthermore, a fan 9 and a compression 1io are provided in the main body 3,
For the compressor 10, the condenser 8. A pressure reducing device (not shown) and an evaporator 7 are successively connected to form a refrigeration cycle.

That is, by operating the fan 9, air is drawn from the suction port 4 to the bathroom 1.
Air is sucked in, dehumidified by an evaporator 7, reheated by a condenser 8, and blown out into the bathroom 1 as dehumidified air at normal temperature. Note that the exhaust port 6 can be opened and closed, and when opened, the air (humidity) in the bathroom can be exhausted to the outside.

On the other hand, FIGS. 8 and 9 are substantially the same as FIG. 7, but differ greatly in that the operation unit 11 is led out from the main body 1 and the ventilation to the exhaust port 6 is controlled by a damper 12. ing.

(Problems to be Solved by the Invention) However, although the dehumidifying effect is good in energy efficiency, it has the disadvantage that the drying time is extremely long at low temperatures.

Furthermore, those that utilize heater heat generation have the disadvantage that the electricity bill is 1.5 to 2 times higher than those that utilize dehumidification.

Furthermore, devices that utilize hot water heat have drawbacks such as being large-scale devices, resulting in restrictions on installation locations and high installation costs.

This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a system that is efficient in a short period of time, without being subject to restrictions on installation location, and without incurring high installation costs or operating costs. The purpose of the present invention is to provide a bathroom dryer that can perform good drying.

[Structure of the invention] (Means for solving the problem) A first evaporator, a condenser, and an indoor fan are arranged in a first space of the main body communicating with the bathroom side, and a second space of the main body communicating with the outdoor side. In a bathroom dryer that has a second evaporator and compressor installed in the space and enables dehumidification and heating operations in the bathroom by switching the flow path of the refrigeration cycle, a temperature sensor is installed to detect the temperature in the bathroom. Additionally, during the dehumidifying operation, if the temperature detected by the temperature sensor is below a set value, a control means is provided which executes the heating operation and then shifts to the dehumidifying operation.

(effect) Executing the dehumidifying operation dries the bathroom.

However, when the temperature in the bathroom is below the set value, heating operation is performed to raise the temperature in the bathroom.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 21 is a compressor, and this compressor 21 is connected to a condenser 22. Four-way valve 23. Capillary tube 24, which is the first pressure reducing device. and the first evaporator 25 are sequentially connected. Furthermore, the compressor 21. Condenser 22゜four-way valve 23
On the other hand, the capillary tube 26. which is the second pressure reducing device. and the second evaporator 27 are sequentially connected. That is, by switching the flow paths of the four-way valve 23, compression 1121. Condenser 22. Four-way valve 23, capillary tube 24. A dehumidification cycle in which refrigerant circulates through the first evaporator 25 and a compressor 21 as shown by the black arrow in the figure. Condensation B
22. Four-way valve 23. Capillary tube26. A heating cycle in which refrigerant circulates through the second evaporator 27 can be selectively formed.

A gas bypass cycle is provided between the refrigerant discharge side of the compressor 4121 and the cold ml inlet side of the first evaporator 25 via the two-way valve 28. Furthermore, a two-way valve 29 is provided between the refrigerant discharge side of the compressor 21 and the refrigerant inflow side of the second evaporator 21.
A hot gas bypass cycle is provided via.

Note that a heat exchanger temperature sensor 30a is attached to the first evaporator 25, and a heat exchanger temperature sensor 30b is attached to the second evaporator 27.

Further, one opening of the four-way valve 23 is communicated with the suction side of the compressor 21, which is necessary for the operation of the four-way valve 23.

As shown in FIG. 2, the main body 33 of the bathroom dryer is attached to the outer peripheral surface of the wall 32 forming the bathroom 31. This main body 33 has a first space 3 inside with a partition plate 34.
5 and a second space 71036, and the first space 35 communicates with the inside of the bathroom 31 by a duct 37 penetrating the wall 32. Roughly speaking, a partition plate 38 is provided from the communication part to the inside of the bathroom 31, that is, the duct 37, to the first space 35, and the space from the duct 37 to the first space 35 is partitioned into a suction air passage 39 and an outlet air passage 40.

Further, in the first space 35, the first evaporator 25 and the condenser 22 are sequentially arranged at positions facing the suction air passage 39. An indoor fan 41 is provided on the side of the first evaporator 25 and the condenser 22 at a position facing the air outlet passage 40. Further, a damper 42 is provided between the indoor fan 41 and the air outlet passage 40, and the damper 42 enables the air outlet passage 40 to be opened and closed. Further, a ventilation hole 34a is formed in the partition plate 34 located between the damper 42 and the indoor fan 41, and the first space 35 and the second space 36 are communicated with each other.

On the other hand, a ventilation hole 4 is provided in the second space 36 on the side of the first space 35.
3 is provided, and the second space 36 is communicated with the outside through the vent hole 43. Then, the second evaporator 27 and the outdoor fan 44 are sequentially arranged near the vent 43 in the second space 36. Furthermore, the compressor 21 and the fan motor 41M
to be placed.

Note that a bathroom temperature sensor 50 is provided in the bathroom 20.

FIG. 3 shows the control circuit.

60 is a microcomputer which is a main control section, and this microcomputer 60 is connected to a compressor drive circuit 61.
, a fan drive circuit 62, a valve drive circuit 63, a damper drive section 64, an operation operation section 65, the heat exchanger temperature sensor 30a,
30b, the bathroom temperature sensor 50 is connected.

The compressor motor 21M is connected to the compressor drive circuit 61, and the fan motor 41M is connected to the fan drive circuit 62.

Connect 44M. Furthermore, the four-way valve 2 is connected to the valve drive circuit 63.
3 and two-way valves 28, 29 are connected.

Next, the operation of the above configuration will be explained with reference to the flowchart of FIG. 4.

A desired driving time ts is set using the driving operation section 65, and a driving start operation is performed. Then, microcomputer 6
0 means that after waiting for a certain period of time, for example 3 minutes,
A comparison is made between the temperature Ta detected by the bathroom temperature sensor 50 (hereinafter referred to as bathroom temperature) and a set temperature, for example, 20°C.

If the bathroom temperature Ta is 20° C. or higher, the microcomputer 60 starts the compression 8121 and the indoor fan 41. When the compressor 21 is started, the refrigerant flows in the direction shown by the white arrow in FIG. 1, forming a dehumidification cycle. Also,
When the indoor fan 41 starts, the air in the bathroom flows through the suction ventilation path 39. as shown by the white arrow in FIG. First evaporator 25.
Condenser 22. It circulates through the blowout air passage 40. Therefore, the bathroom air is dehumidified when passing through the first evaporator 25 and reheated when passing through the condenser 22, and is blown into the bathroom 31 as dehumidified air at normal temperature.

During this dehumidification operation, the microcomputer 60 operates an internal dehumidification timer to accumulate the execution time of the dehumidification operation.

Then, when the execution time reaches one hour and the dehumidification timer is turned on, the detected humidity Tel of the heat exchanger temperature sensor 30a (
It is determined whether the temperature (temperature of the first evaporator 25) is 0° C. or lower.

If the heat exchanger temperature Tet is 0°C or lower, the three-way valve 28 is opened and a part of the refrigerant (high temperature refrigerant) discharged from the compressor 21 is transferred to the first
is supplied to the evaporator 25, and the first evaporator 25 is simultaneously dehumidified.
Defrost. Thereafter, when the heat exchanger temperature Tet reaches the set temperature, for example, 7° C. or higher, or the elapsed time t2 from the start of defrosting reaches the defrosting time safe time, for example, 20 minutes or more, the two-way valve 28 is closed, Finish defrosting.

On the other hand, when the bathroom temperature Ta is 20'C or less at the start of operation, or when the bathroom temperature Ta is 20'C or less during dehumidification operation.
When the temperature drops below, the microcomputer 60 controls the compression 1fi 21 and the outdoor fan 4 in addition to the indoor fan 41.
4, and further switches the four-way valve 23. When the four-way valve 23 switches, the refrigerant flows in the direction shown by the black arrow in FIG. 1, forming a heating cycle. Also, fan 4
1.44 operate together, the air in the bathroom flows through the suction air passage 39.44, as shown by the black arrow in FIG. First evaporator 25.
Condenser 22. The outdoor air is circulated through the outlet air passage 40 and further circulated through the second evaporator 27 . Therefore, heat is pumped up from the outdoor air passing through the second evaporator 27,
It is discharged into the bathroom air through the condenser 22, increasing the temperature of the bathroom air.

When the bathroom temperature Ta becomes 20°C or higher due to this heating operation, the microcomputer 60 returns the four-way valve 23 (
operation), and the operation of the outdoor fan 44 is also stopped, and the above-described dehumidification operation is carried out once.

Furthermore, the microcomputer 60 operates an internal warming timer every time the heating operation is performed, and adds up the execution time of the heating operation. When the execution time reaches 1 hour and the heating timer turns on, the bath water temperature Ta still remains at 2.
If it is below 0°C, then it is determined whether the temperature Te2 detected by the heat exchanger temperature sensor 30b (temperature of the second evaporator 27) is above 0°C.

If the heat exchanger temperature Te2 is 0° C. or higher, the dehumidifying operation described above is continued for a predetermined period of time, for example, 20 minutes. After that, the process moves to a step of determining the heat exchanger temperature Tet.

However, if the heat exchanger temperature Te2 is 0°C or less, the two-way valve 2
9 is opened to supply a part of the refrigerant (high temperature refrigerant) discharged from the compressor 21 to the second evaporator 27, and the second evaporator 27 is defrosted at the same time as the heating operation. Then, either the heat exchanger temperature Te2 becomes higher than the set temperature, e.g. 7°C, or the elapsed time t3 from the start of defrosting exceeds the defrosting time safe time, e.g. 20°C.
When the defrosting time is reached, the two-way valve 29 is opened and defrosting is completed. Then, the above-described dehumidification operation continues for 20 minutes.

Thus, the microcomputer 60 measures the elapsed time t1 from the start of operation, and when the elapsed time t1 reaches the set time ts, all operations are stopped.

Further, when the operation operation unit 65 performs an operation to start the ventilation operation, the microcomputer 60 starts the fans 41 and 44 and operates the damper drive unit 64. When the damper drive unit 64 operates, the damper 42 rotates to the position shown by the two-dot chain line in FIG. 2, thereby blocking the blowout air passage 40. Therefore, as shown by the dotted arrows in FIG.
It enters the second space 36 through a. Then, it is discharged to the outside from the vent 43.

In this way, by performing heating operation when the bathroom temperature Ta is 20°C or lower, and performing dehumidification operation when the bathroom temperature Ta is raised to 20°C or higher, the drying efficiency can be increased by 20% or more.
This can be improved by about 30%, and the inside of the bathroom 31 can be quickly dried in a short period of time. In particular, compared to conventional bathroom dryers that use heat generated by a heater, the electricity bill is very low, and unlike bath seedling dryers that use hot water heat, there are restrictions on the installation location and the installation costs are high. There is no invitation. Moreover, since the defrosting opening and opening of the first evaporator 25 and the second evaporator 27 are performed based on the integration of the operation execution time, stable operation can always be performed. Furthermore, the heating function can be used not only for drying but also for heating the bathroom in winter, making it very practical.

Here, the reason why the drying efficiency improves will be explained.

It is known that the amount of moisture evaporated from clothing is proportional to the difference between the surrounding dry bulb temperature and wet bulb temperature, assuming that the surface area of the clothing and the wind speed are constant.

From this, there exists a relationship between the bathroom temperature and the amount of water evaporation as shown in FIG. 5, for example, using the bathroom temperature as a parameter.

That is, in FIG. 5, the bathroom temperature Ta is 10°C,
When the bathroom interior temperature (relative humidity) RH is 60%, when dehumidifying operation is performed, the amount of water evaporation increases as indicated by the thick arrow. In addition, since the amount of moisture evaporation in this case varies depending on the surface area of the clothing and the wind speed as described above, the amount of moisture evaporation is expressed as an absolute value of "1" as the ratio of the amount of moisture evaporation. Furthermore, there is an upward change in the bathroom temperature Ta, but this is due to the reheating effect of the dehumidifying operation.

Therefore, if the bathroom temperature Ta is heated to 20° C. under the same conditions where the bathroom humidity Ta is 10° C. and the bathroom humidity RH is 60%, the bathroom temperature RH decreases to 30%. In this case, the actual humidity RH in the bathroom is 40% as indicated by the thick arrow because of the influence of wet clothes in the bathroom, but the water evaporation ratio is as high as "1.9".

On the other hand, g! Since only the duct 37 from the main body 33 is exposed on the inner surface of the wall 32, there is almost no protrusion into the bathroom 31, and the area occupied on the inner surface of the wall 32 is small. In addition, the duct 37 can be inserted into an existing ventilation fan mounting hole, thereby eliminating the need for construction work on the wall 32. In addition, in the main body 33 on the outdoor side, the internal fan 41 is located on the side of the first evaporator 25 and the condenser 22, that is, along the wall 32, so the depth dimension is small (thin) and the fan 41 protrudes outdoors. It's also small. This leads to improved aesthetics of the residence and effective use of outdoor space.

In the above embodiment, the bathroom temperature Ta for switching between the dehumidifying operation and the heating operation was set to 20° C., and the heating timer time was set to 1 hour, but these values depend on the size of the bathroom 31 and the heating time. It is necessary to set the heating capacity to an optimum value, taking into account the heating capacity of the bathroom (34 tsubo area) as shown in FIG.

[Effects of the Invention] As described above, according to the present invention, it is possible to perform efficient drying in a short time without being restricted by the installation location and without incurring high installation costs or operating costs. We can provide a bathroom dryer.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of a refrigeration cycle in one embodiment of the present invention, FIG. 2 is a diagram showing the configuration of the internal bund structure in the same embodiment, and FIG. 3 is a diagram showing the configuration of the control circuit in the same embodiment. FIG. 4 is a flowchart for explaining the operation of the same embodiment, FIG. 5 is a diagram for explaining the water evaporation type according to the same embodiment, and FIG. 6 is a diagram showing heat leakage in a bathroom according to the same embodiment. 7 and 8 are diagrams showing the construction of a conventional bathroom dryer, respectively, and FIG. 9 is a cross-sectional view taken along the line A-A' in FIG. 8 when viewed in the direction of the arrow. 21... Compressor, 22... Condenser, 23... Four-way valve, 24... Capillary tube (first pressure reduction! ifi
25... first evaporator, 26... capillary tube (second pressure reducing device), 27... second evaporator, 31...
... Bathroom, 41... School fan, 5°... Bathroom temperature sensor. Applicant's agent Patent attorney Takehiko Suzue ← Figure 1 Kanakura ↓ Figure 2 Figure 3 Figure number i in 5u ("C") - Tsuta 5 Figure 2) Matter 71 Shiden kJta "JliuJ (deg) - No. 6
′! M Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] A first evaporator, condenser, and indoor fan are arranged in the first space of the main body communicating with the bathroom side, and a second evaporator and compressor are arranged in the second space of the main body communicating with the outdoor side. In a bathroom dryer that enables dehumidifying operation and heating operation in the bathroom by switching the flow path of the cycle, there is a temperature sensor that detects the temperature in the bathroom, and when the dehumidifying operation is performed, the detected temperature of the temperature sensor is lower than the set value. A bathroom dryer characterized by comprising: a control means for performing a heating operation and then shifting to a dehumidifying operation in the case of the above.