JPH0722637B2 - Bathroom Dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a bathroom dryer used when a bathroom is used as a clothes drying room.

(Prior Art) Generally, this kind of bathroom dryer can be divided as follows according to a heat source.

(1) Utilizing the dehumidifying action of the refrigeration cycle.

(2) Utilizing heat generated by the heater.

(3) Those that utilize hot water heat.

As for utilizing the dehumidifying action, there are No. 59-84323 (Fig. 7) and No. 58-142623 (Figs. 8 and 9).
There is a figure).

In FIG. 7, 1 is a bathroom and 2 is a wall. Then,
A main body 3 of the bathroom dryer is provided on the inner surface of the wall 2. The main body 3 extends through the wall 2 to the outside of the room, has a suction port 4 and a blow-out port 5 on the front surface on the bathroom side, and has an exhaust port 6 on the back surface on the outdoor side. Then, in the main body 3, an evaporator 7 and a condenser 8 are sequentially arranged near the suction port 4. Further, a fan 9 and a compressor 10 are provided in the main body 3, and the condenser 10, the pressure reducing device (not shown), and the evaporator 7 are sequentially connected to the compressor 10 to form a refrigeration cycle.

That is, the operation of the fan 9 causes the bathroom 1 to move from the suction port 4.
The inside air is sucked, the evaporator 7 dehumidifies it, the condenser 8 reheats it, and blows it out into the bathroom 1 as dehumidified air of normal temperature. The exhaust port 6 is openable and closable so that the air (moisture) in the bathroom can be discharged to the outside by opening it.

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

(Problems to be Solved by the Invention) However, in the case of utilizing the dehumidifying action, although the energy efficiency is good, there is a drawback that the drying time becomes extremely long at low temperature.

In addition, the one using the heat generated by the heater has a disadvantage that the electricity charge is 1.5 to 2 times as high as the one using the dehumidifying action.

Further, in the case of utilizing hot water heat, there are disadvantages that the device becomes large in size and thus the installation place is restricted and the installation cost is high.

The present invention has been made in view of the circumstances as described above, and the purpose thereof is not to be restricted in the installation location, and to avoid costly installation costs and operating costs, and to achieve high efficiency in a short time. It is to provide a bathroom dryer capable of performing good drying.

[Structure of the Invention] (Means for Solving the Problems) In the present invention, the inside is partitioned by a partition plate, and the first space communicates with the inside of the bathtub by the suction air passage and the blow air passage,
Inside the bathroom through a main body having a second space communicating with the outside of the bathroom, a first evaporator and a condenser provided in the first space of the main body, the suction ventilation passage, the first evaporator, and the condenser The air blown through the condenser and the air that has passed through the condenser to the blowout air passage, the openable and closable damper provided in the blowout air passage, and the partition plate of the main body, and the closing of the damper. Occasionally, a ventilation path for guiding the air blow of the indoor blower from the first space to the second space, a compressor provided in the second space of the main body, a second evaporator, and air outside the bathroom are used for the second evaporation. An outdoor blower which circulates through the condenser, a discharge refrigerant of the compressor is passed through the condenser, a refrigerant passing through the condenser is returned to the compressor through the first evaporator, and means for forming a dehumidification cycle, With the formation of the dehumidification cycle, Operating on the indoor blower open, and means for executing the dehumidifying operation, the refrigerant discharged from the said compressor through the condenser, the condenser of the refrigerant the second passing through
A means for forming a heating cycle through the evaporator and returning to the compressor, and with the formation of this heating cycle, the damper is opened to turn on the indoor blower and turn on the outdoor blower. , Means for performing a heating operation, the damper is closed, the indoor blower is turned on, and the air in the bathroom is passed through the suction ventilation passage, the first space, the ventilation passage, and the second space. A means for performing ventilation operation for discharging outside the bathroom, a bathroom temperature sensor for detecting the temperature in the bathroom, and the execution of the dehumidifying operation when the detected temperature of the bathroom temperature sensor is a set value or more, and A means for selecting execution of the heating operation when the temperature detected by the temperature sensor in the bathroom is below a set value, a first temperature sensor for detecting the temperature of the first evaporator, and a temperature for the second evaporator. Second
If a temperature sensor, a dehumidification timer that integrates the execution time of the dehumidification operation, and the integrated temperature of the dehumidification timer reaches a predetermined value and the detected temperature of the first temperature sensor is equal to or less than a set value, Means for supplying a part of the refrigerant discharged from the compressor to the first evaporator to defrost the first evaporator at the same time as the dehumidifying operation; and a heating timer for integrating the execution time of the heating operation, When the integrated time of the warming timer reaches a predetermined value, and if the temperature detected by the second temperature sensor is equal to or lower than the set value, a part of the refrigerant discharged from the compressor is supplied to the second evaporator. Means for defrosting the second evaporator at the same time as the heating operation.

(Operation) Since the main body is configured to communicate with the inside of the bathroom through the suction air passage and the blowout air passage, the main body does not project into the bathroom, and the area occupied by the inner peripheral surface of the wall of the bathroom becomes small.
Not only the dehumidifying operation, but also the heating operation and the ventilation operation have the functions to improve the ventilation efficiency and the drying efficiency in the bathroom. Especially, when the temperature in the bathroom is higher than the set value, the dehumidifying operation is selected to remove the moisture in the bathroom, but when the temperature in the bathroom is lower than the set value, the heating operation is selected and the bathroom is selected. Increase the internal temperature. Then, when the execution time of the dehumidification operation reaches a predetermined value and the temperature of the first evaporator is equal to or lower than the set value, a part of the refrigerant discharged from the compressor is supplied to the first evaporator, and at the same time as the dehumidification operation. Defrost the first evaporator. Also, when the execution time of the heating operation reaches a predetermined value,
If the temperature of the second evaporator is equal to or lower than the set value, a part of the refrigerant discharged from the compressor is supplied to the second evaporator, and the second evaporator is defrosted simultaneously with the heating operation.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 21 denotes a compressor, and the compressor 21 has a condenser.
22, the four-way valve 23, the first decompression device, the capillary tube 24, and the first evaporator 25 are sequentially connected. Further, to the compressor 21, the condenser 22, and the four-way valve 23, the capillary tube 26, which is a second pressure reducing device, and the second evaporator 27 are sequentially connected. That is, by switching the flow path of the four-way valve 23, the compressor 21, the condenser 22, the four-way valve 2 as shown by the white arrow in the figure.
3, the dehumidification cycle in which the refrigerant circulates through the capillary tube 24, the first evaporator 25, and the compressor 2 as shown by the black arrow in the figure.
The heating cycle in which the refrigerant circulates through the condenser 1, the four-way valve 23, the capillary tube 26, and the second evaporator 27 can be selectively formed.

A hot gas bypass cycle is provided between the refrigerant discharge side of the compressor 21 and the refrigerant inflow side of the first evaporator 25 via the two-way valve 28. Further, a hot gas bypass cycle is provided between the refrigerant discharge side of the compressor 21 and the refrigerant inflow side of the second evaporator 27 via a two-way valve 29.

The heat exchanger temperature sensor 30a serving as the first temperature sensor is attached to the first evaporator 25, and the heat exchanger temperature sensor 30b serving as the second temperature sensor 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.

Then, as shown in FIG. 2, a wall 32 forming a bathroom 31.
Attach the bathroom dryer body 33 to the outer peripheral surface of the. The main body 35 is internally divided by a partition plate 34 into a first space 35 and a second space.
36, and the first space 35 communicates with the inside of the bathroom 31 by a duct 37 penetrating the wall 32. In addition, the bathroom 31
A partition plate 38 is provided from the communication part to the inside, that is, from 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 ventilation passage 39 and a blowout ventilation passage 40.

Further, in the first space 35, the first evaporator 25 and the condenser 22 are sequentially arranged at positions facing the suction ventilation passage 39. Then, an indoor blower 41 is provided on the side of the first evaporator 25 and the condenser 22 at a position facing the blowout air passage 40. further,
A damper 42 is provided between the indoor fan 41 and the blowout air passage 40,
The damper 42 enables opening and blocking of the blowout air passage 40. In addition, a ventilation path 34a is formed in the partition plate 34 located between the damper 42 and the indoor blower 41 to connect the first space 35 and the second space 36. The air passage 34a is provided in the damper 4
When the 2 is closed, the air blower 41 blows the air from the first space 35 to the second
It works to lead to space 36.

On the other hand, a vent 43 is provided in the second space 36 on the side of the first space 35, and the vent 43 connects the second space 36 to the outside. Then, in the vicinity of the vent hole 43 in the second space 36, the second
The evaporator 27 and the outdoor blower 44 are sequentially arranged. further,
A compressor 21 and a fan motor 41M are arranged.

A bathroom temperature sensor 50 is provided in the bathroom 20.

FIG. 3 shows a control circuit.

60 is a microcomputer which is the main control unit,
A compressor drive circuit 61, a fan drive circuit 62, a valve drive circuit 63, a damper drive unit 64, a drive operation unit 65, the heat exchange temperature sensors 30a and 30b, and a bathroom temperature sensor 50 are connected to the microcomputer 60. Then, the compressor motor 21M is connected to the compressor drive circuit 61, and the fan motor 41 is connected to the fan drive circuit 62.
Connect M and 44M. Further, the four-way valve 23 and the two-way valves 28, 29 are connected to the valve drive circuit 63.

Next, the operation of the above structure will be described with reference to the flowchart of FIG.

A desired operating time ts is set by the operation operating unit 65, and an operation for starting operation is performed. Then, the microcomputer 60
After securing a waiting time of a certain time, for example, 3 minutes, the temperature detected by the bathroom temperature sensor 50 (hereinafter referred to as the bathroom temperature)
Compare Ta with the set temperature, for example 20 ° C.

If the bathroom temperature Ta is 20 ° C. or higher, the microcomputer 60 activates the compressor 21 and the indoor fan 41. Compressor
When 21 is activated, the refrigerant flows in the direction indicated by the white arrow in FIG. 1 to form the dehumidification cycle. That is, the refrigerant discharged from the compressor 1 flows into the condenser 22, and the refrigerant passing through the condenser 22 returns to the compressor 21 through the first evaporator 25. When the indoor fan 41 is activated, the air in the bathroom circulates through the suction air passage 39, the first evaporator 25, the condenser 22, and the air outlet passage 40, as shown by the white arrow in FIG. Therefore, the air in the bathroom is dehumidified when passing through the first evaporator 25, is reheated when passing through the condenser 22, and is blown into the bathroom 31 as dehumidified air of normal temperature.

During this dehumidifying operation, the microcomputer 60 activates an internal dehumidifying timer to integrate the execution time of the dehumidifying operation. Then, when the accumulated time reaches one hour and the dehumidification timer is turned on, the temperature Te ₁ detected by the heat exchange temperature sensor 30a (the first evaporator 25
Temperature) is 0 ° C. or lower.

If the heat exchange temperature Te ₁ is 0 ° C. or lower, the two-way valve 28 is opened and a part of the refrigerant (high temperature refrigerant) discharged from the compressor 21 is removed from the first evaporator 25.
To defrost the first evaporator 25 at the same time as the dehumidifying operation. Thereafter, when the heat exchange temperature Te ₁ becomes a set temperature, for example, 7 ° C or higher, or when the elapsed time t ₂ from the start of defrosting becomes a defrosting time safe time, for example, 20 minutes or longer, the two-way valve 28 is closed there. And finish defrosting.

On the other hand, when the bathroom temperature Ta is 20 ° C. or lower at the start of operation, or when the bathroom temperature Ta drops to 20 ° C. or lower during dehumidification operation, the microcomputer 60 causes the outdoor fan in addition to the compressor 21 and the indoor fan 41. 44 is started, and the four-way valve 23 is switched and operated. When the four-way valve 23 is switched, the refrigerant flows in the direction indicated by the black arrow in FIG. 1 to form a heating cycle. That is, the refrigerant discharged from the compressor 1 becomes the condenser 22.
The refrigerant having passed through the condenser 22 returns to the compressor 21 through the second evaporator 27. Further, since the fans 41 and 44 operate together, as shown by the black arrow in FIG. 2, the air in the bathroom circulates through the suction air passage 39, the first evaporator 25, the condenser 22, and the air outlet passage 40, Further, outdoor air circulates through the second evaporator 27. Therefore, heat is drawn from the outdoor air passing through the second evaporator 27, and is released to the bathroom air passing through the condenser 22, so that the temperature of the bathroom air rises.

When the temperature Ta in the bathroom becomes 20 ° C. or higher due to this heating operation, the microcomputer 60 resets (stops operation) the four-way valve 23, stops the operation of the outdoor fan 44, and executes the dehumidification operation described above.

In addition, the microcomputer 60 activates an internal heating timer each time the heating operation is performed, and integrates the execution time of the heating operation. Then, when the accumulated time reaches 1 hour and the heating timer is turned on, if the bathroom temperature Ta is still 20 ° C. or lower, the temperature Te detected by the heat exchange temperature sensor 30b is detected there.
₂ It is determined whether (the temperature of the second evaporator 27) is 0 ° C. or higher.

If the heat exchange temperature Te ₂ is 0 ° C. or higher, the dehumidifying operation described above is continuously executed for a predetermined time, for example, 20 minutes. After that, the process proceeds to the heat exchange temperature Te ₁ determination step.

However, if the heat exchange temperature Te ₂ is 0 ° C. or lower, the two-way valve 29 is opened and a part of the refrigerant discharged from the compressor 21 (high temperature refrigerant) is discharged to the second side.
It is supplied to the evaporator 27 and the second evaporator 27 is defrosted simultaneously with the heating operation. After that, the heat exchange temperature Te ₂ becomes a set temperature, for example, 7 ° C or higher, or the time elapsed from the start of defrosting.
When t ₃ becomes the defrost time safe time, for example 20 minutes or more,
Therefore, the two-way valve 29 is closed and the defrosting is completed. Then, the dehumidifying operation that continues for 20 minutes is executed.

Then, the microcomputer 60 measures the elapsed time t ₁ from the start of operation, and the elapsed time t ₁ is the set time ts.
When it reaches, all operations are stopped.

In addition, when the operation operation section 65 is used to start the ventilation operation,
The microcomputer 60 activates the fans 41 and 44 and operates the damper drive unit 64. When the tamper drive unit 64 operates, the damper 42 rotates to the position shown by the chain double-dashed line in FIG. 2 to shut off the blowout air passage 40. Therefore, as shown by the dotted arrows in FIG. 2, the air in the bathroom enters the suction ventilation passage 39, the first space 35, and the second space 36 through the ventilation port 34a. Then, it is discharged to the outside from the ventilation hole 43.

In this way, when the bathroom temperature Ta is 20 ° C or lower, the heating operation is performed, and the dehumidification operation is performed with the bathroom temperature Ta raised to 20 ° C or higher, so that the drying efficiency is about 20% to 30%. Therefore, the inside of the bathroom 31 can be quickly dried in a short time. In particular, the electricity charges are much cheaper than conventional bathroom dryers that use heat from the heater, and there are restrictions on installation locations such as bathroom dryers that use hot water heat, and installation costs are high. There is no invitation. Further, since the defrosting control for the first evaporator 25 and the second evaporator 27 is performed by integrating the operation execution time, the dehumidifying ability and the heating ability are improved and the stable operation can be always performed. . Furthermore, the heating function can be used not only for drying but also for heating the bathroom in winter,
Practicality is great.

Here, the reason why the drying efficiency is improved will be described.

It is known that the amount of water evaporated from clothes is proportional to the difference between the ambient dry-bulb temperature and the wet-bulb temperature, provided that the surface area of the clothes and the wind speed are constant. From this, there is a relationship between the bathroom temperature and the water evaporation amount, for example, as shown in FIG. 5 with the bathroom humidity as a parameter.

That is, in FIG. 5, when the bathroom temperature Ta is 10 ° C. and the bathroom temperature (relative humidity) RH is 60%, when the dehumidifying operation is performed, the water evaporation amount increases as indicated by the thick arrow. Since the amount of water evaporation in this case varies depending on the surface area of the clothes and the wind speed as described above, the absolute value “1” is shown as the ratio of the amount of water evaporation. Further, there is an upward change in the bathroom temperature Ta, which is due to the reheating effect of the dehumidifying operation.

Under the same condition that the bathroom temperature Ta is 10 ° C and the bathroom humidity RH is 60%, if the bathroom temperature Ta is heated to 20 ° C,
Along with that, the bathroom temperature RH drops to 30%. In this case, since the wet clothes in the bathroom influence, the actual bathroom humidity RH is 40% as shown by the thick arrow, but the water evaporation ratio is high at "1.9".

On the other hand, 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 by the inner surface of the wall 32 is small. Moreover, the duct
The 37 can be inserted into an existing ventilation fan mounting hole or the like, which eliminates the need for construction on the wall 32. Also,
In the outdoor main body 33, the indoor fan 41 includes the first evaporator.
Since it exists on the side of 25 and the side of the condenser 22, that is, along the wall 32, the depth dimension is small (thin type), and the projection to the outside is also small. This will improve the aesthetics of the house and make effective use of the outdoor space.

Only the first evaporator 25, the condenser 22, and the indoor blower 41 are present in the first space 35 that serves as a ventilation path during dehumidification and heating, so that there is an obstacle in the ventilation path in the first space 35. However, there is an advantage that the blowing efficiency is improved and the dehumidified air and the warmed air are efficiently sent into the bathroom 31. The improvement of the blowing efficiency further promotes the effect of improving the drying efficiency based on the combined use of the dehumidifying operation and the heating operation.

In the above embodiment, the bathroom temperature Ta for switching between the dehumidifying operation and the heating operation is set to 20 ° C., and the heating timer time is set to one hour. It is necessary to set the optimum value in consideration of the heating capacity and the heat leak amount characteristic of the bathroom (width of 34 tsubo) as shown in FIG.

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

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a refrigeration cycle in one embodiment of the present invention, FIG. 2 is a diagram showing a configuration of an internal mechanism of the same embodiment, and FIG. 3 is a diagram showing a configuration of a control circuit in the same embodiment. FIG. 4 is a flow chart for explaining the operation of the same embodiment, FIG. 5 is a view for explaining the amount of water evaporation according to the same embodiment, and FIG. 6 is a heat leak amount characteristic of the bathroom according to the same embodiment. FIG. 7, FIG. 7 and FIG. 8 are views showing the structure of a conventional bathroom dryer, and FIG. 9 is a view of the cross section taken along the line AA ′ of FIG. 21 ... Compressor, 22 ... Condenser, 23 ... Four-way valve, 24 ... Capillary tube (first pressure reducing device), 25 ... First evaporator, 26 ... Capillary tube (second pressure reducing device), 27 ...
… Second evaporator, 31 …… Bathroom, 41 …… Indoor fan, 50 ……
Bathroom temperature sensor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Michio Kubo 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba Corp. Fuji Factory (56) References JP 61-5897 (JP, A)

Claims (1)

[Claims] 1. A first space, the interior of which is partitioned by a partition plate, and which communicates with the inside of the bath by a suction air passage and a blow air passage.
A main body having a second space communicating with the outside of the bathroom, a first evaporator and a condenser provided in the first space of the main body, and the inside of the bathroom through the suction ventilation passage, the first evaporator, and the condenser A blower that sucks in the air and sends the air that has passed through the condenser to the blowout air passage, an openable damper provided in the blowout air passage, a partition plate of the main body, and a closing of the damper. A ventilation passage for guiding the air blown by the indoor blower from the first space to the second space, a compressor provided in the second space of the main body, a second evaporator,
And an outdoor blower that circulates air outside the bathroom through the second evaporator; a refrigerant discharged from the compressor is passed through the condenser; and a refrigerant passing through the condenser is passed through the first evaporator and returned to the compressor. A means for forming a dehumidification cycle, a means for performing the dehumidification operation by opening the damper and operating the indoor blower with the formation of the dehumidification cycle, and a refrigerant discharged from the compressor to the condenser. A means for forming a heating cycle by passing the refrigerant that has passed through the condenser through the second evaporator and returning it to the compressor; and with the formation of the heating cycle, the damper is opened to open the indoor blower. Operation is turned on, and the outdoor blower is turned on, a means for performing a heating operation, the damper is closed to turn on the indoor blower, the air in the bathroom is the suction ventilation passage, the first space, The air passage And means for performing a ventilation operation of discharging the air through the second space to the outside of the bathroom, a bathroom temperature sensor for detecting the temperature in the bathroom, and the dehumidification when the temperature detected by the bathroom temperature sensor is equal to or higher than a set value. Means for selecting execution of operation, selecting execution of the heating operation when the temperature detected by the temperature sensor in the bathroom falls below a set value, a first temperature sensor for detecting the temperature of the first evaporator, and A second temperature sensor that detects the temperature of the second evaporator, a dehumidification timer that integrates the execution time of the dehumidification operation, and a first temperature sensor of the first temperature sensor when the integration time of the dehumidification timer reaches a predetermined value. If the detected temperature is equal to or lower than the set value, a part of the refrigerant discharged from the compressor is supplied to the first evaporator,
Means for defrosting the first evaporator at the same time as the dehumidifying operation, a warming timer for integrating the execution time of the warming operation, and when the cumulative time of the warming timer reaches a predetermined value, the first If the temperature detected by the 2 temperature sensor is equal to or lower than the set value, a part of the refrigerant discharged from the compressor is supplied to the second evaporator,
A bathroom dryer, comprising: means for defrosting the second evaporator at the same time as the heating operation.