JP4077251B2 - Dehumidifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dehumidifier having a moisture absorption rotor and a refrigeration cycle.
[0002]
[Prior art]
As shown in Japanese Patent No. 2819497 as a conventional example, a dehumidifier is provided with a hygroscopic rotor, a heater, and a sensible heat exchanger. After moisture in the intake air is absorbed by the hygroscopic rotor, the hygroscopic rotor is heated by the heater. The dehumidifier with a method of condensing the released moisture in the sensible heat exchanger and collecting it in the tank seems to be adopted in small dehumidifiers for home use due to low noise and less fluctuation in dehumidification capacity due to room temperature. Became.
[0003]
A dehumidifier that has a refrigeration cycle in the dehumidifier, condenses the sucked air with an evaporator, then heats it with a condenser, and then exhausts the dry air into the room has a dehumidifying capacity compared to a dehumidifying rotor type dehumidifier. Large dehumidification efficiency.
[0004]
[Problems to be solved by the invention]
By the way, the former dehumidifier has a problem that the power consumption of the heater is large and the efficiency is poor.
In addition, since a large space is required for the hygroscopic rotor, increasing the dehumidifying capacity increases the size of the housing, and it can be used in a dehumidifier with a large dehumidifying capacity in terms of space saving and compactness, which is the flow of the entire home appliance. There wasn't.
[0005]
Further, the latter dehumidifier has a problem that the noise and vibration of the compressor provided in the refrigeration cycle are large, and as the capacity of the compressor is increased, the noise and vibration are further increased.
In addition, this type of dehumidifier generates frost in the evaporator when the room temperature is low, and requires defrosting operation to remove the generated frost regularly. Therefore, the dehumidifying capacity varies greatly depending on the room temperature, and it is extremely dehumidified at low temperatures. There was a problem that capacity decreased.
For this reason, since the two-way valve and the bypass circuit for the defrosting operation are provided in the refrigeration cycle, the refrigeration cycle becomes complicated, and the switching sound of the refrigeration cycle such as the two-way valve causes noise.
[0006]
[Means for solving problems]
This invention pays attention to this point and solves the above-mentioned drawbacks. In order to solve the above-mentioned drawbacks, the second air blower, the heater, the moisture absorption rotor, and the sensible heat exchanger are connected in an annular manner, and the indoor air is sucked in by absorbing the indoor air. A second air passage that dehumidifies and discharges dry air by the first air blower, and a first air passage that sucks indoor air and cools the sensible heat exchanger and then exhausts the air by the first air blower, and are compressed. A refrigeration cycle in which a compressor, a condenser, a decompression device, and an evaporator communicate with each other, the evaporator on the windward side of the sensible heat exchanger in the first air passage, and the condenser on the leeward side of the sensible heat exchanger A room temperature sensor is provided in the first air passage or the second air passage, the first dehumidification mode in which the dehumidifier is dehumidified by the operation of the compressor and the first air blower, the operation of the hygroscopic rotor , and the first 1 blower and the second blower and moisture row by the operation of the heater There a second dehumidifying mode in which dehumidification by absorbing moisture in the air, when the value of the room temperature sensor is below a first predetermined value, performs the operation in the second dehumidification mode, the value of the room temperature sensor Is equal to or higher than a second predetermined value higher than the first predetermined value, the operation in the first dehumidifying mode is performed, and the value of the room temperature sensor is between the first predetermined value and the second predetermined value. When there is, a control device that performs the combined operation of the first dehumidifying mode and the second dehumidifying mode is provided.
[0009]
As a result, while having the same dehumidifying capacity as a large-scale dehumidifier, it is relatively compact and has low vibration and noise of the compressor. Also, there is no concern about vibration and noise caused by defrosting during low-temperature operation, and stable during low-temperature operation. It is possible to provide a dehumidifier having a dehumidifying capacity.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a frame of a dehumidifier, which is formed of synthetic resin such as ABS, and a drain tank 3 that collects condensed water on a base 2 on the bottom surface is detachable. The compressor 4 is provided next to the drain tank 3.
A suction port 5 formed by a vertically long and slit-like long hole is provided on the front surface of the frame body 1, and a blower outlet 6 is provided above the suction port 5.
[0011]
A first partition plate 8 is provided on the upper surface of the lower storage chamber 7 in which the compressor 4 and the drain tank 3 are stored. An evaporator 10 is provided on the first partition plate 8 via a drain pan 9 from the front side. The sensible heat exchanger 11 is positioned in parallel, and a condenser 12 is provided in parallel behind the sensible heat exchanger 11.
[0012]
A second partition plate 13 is provided above the evaporator 10, the sensible heat exchanger 11 and the condenser 12, and a first air passage 14 is formed between the first partition plate 9 and the second partition plate 13. ing.
A moisture absorption rotor 15 is disposed above the second partition plate 13, and a third partition plate 16 is provided above the moisture absorption rotor 15, and a second partition plate 16 is interposed between the second partition plate 13 and the third partition plate 16. Two air passages 17 are formed, and the first air blower 18 and the air outlet 6 are provided in front of the first air blower 18 above the third partition plate 16.
[0013]
The first blower 18 has a horizontally long cross-flow fan 18a and a blower motor 18b provided on the side of the fan 18a mounted on the inner surface of the frame 1.
The condenser 12 and the evaporator 10 are connected by a refrigerant pipe 20 via a decompression device 19 such as a capillary tube, and the compressor 4, the condenser 12, the decompression device 19, and the evaporator 10 are connected in an annular shape by the refrigerant pipe 20. Thus, a refrigeration circuit is formed.
[0014]
The air sucked from the upper part of the suction port 5 facing the second blower passage 17 is blown into the room from the blower outlet 6 after passing through the first blower 18 after passing through the moisture absorption rotor 15.
On the other hand, the air sucked from the lower part of the suction port 5 facing the first air passage 14 was sucked from the second air passage 17 after passing through the evaporator 10, the sensible heat exchanger 11, and the condenser 12. Together with the air, it passes through the first blower 18 and is blown out into the room from the outlet 6.
[0015]
Reference numeral 21 denotes a third air passage, which includes a second air blower 22 and a heater 23 on the back surface of the moisture absorption rotor 15, and communicates the second air blower 22, the heater 23, and the sensible heat exchanger 11 in a ring shape with a duct 24. is there.
The heater 23 heats the air in the third air passage 21 with a heater of about 500 W composed of a nichrome wire or a sheathed heater.
[0016]
The sensible heat exchanger 11 distributes the air led from the duct 24 to the air passage in the sensible heat exchanger 11 and cools it with the air blown from the first air passage 14, and the generated condensed water is supplied to the drain tray 9. It is a guide.
[0017]
The hygroscopic rotor 15 has a disk shape and is rotatably accommodated in a cylindrical casing 15a. A fan-shaped chamber 15b is provided in front and rear of the hygroscopic rotor 15 at positions facing each other.
[0018]
The moisture absorption rotor 15 is provided with a number of passages 15c impregnated or coated with a substance that absorbs or adsorbs moisture such as calcium chloride, lithium chloride, silica gel, etc., through the front and rear surfaces, and the shaft 15d provided at the center absorbs moisture. While being rotatably supported by the casing 15a of the rotor 15, the front chamber 15b is connected to one connection port 11a of the sensible heat exchanger 11 by a duct 24, and the heater 23 is connected to the rear chamber 15b. A second blower 22 including a turbo fan 22a and a blower motor 22b is provided on the further rear side of the heater 23, and the second blower 22 is connected to the other connection port 11b of the sensible heat exchanger 11 via a duct 24. Connected.
[0019]
A room temperature sensor 25 is provided between the suction port 5 of the second air passage 17 and the moisture absorption rotor 15, and detects the temperature of the suction air with a thermistor sensor or the like.
A humidity sensor 26 is provided between the suction port 5 of the second air passage 17 and the moisture absorption rotor 15 and detects the relative humidity of the intake air.
[0020]
A control device 27 is provided in the lower storage chamber 7 and controls the operation of the compressor 4, the blowers 18 and 22, and the heater 23 based on signals from the operation unit 28 and signals from the room temperature sensor 25 and the humidity sensor 26. It is.
[0021]
If the 1st dehumidification mode by the action | operation of a refrigerating cycle is demonstrated, if the compressor 4 and the 1st air blower 18 start operation, the evaporator 10 will become low temperature, the condenser 12 will become high temperature, and the force of the 1st air blower 18 will be demonstrated. Then, the indoor air sucked into the first air passage 14 from the suction port 5 touches the cold evaporator 10 to condense, and after passing through the sensible heat exchanger 11, the air heated by the condenser 12 and dried is the front air outlet 6. More blown out.
The condensed water generated in the evaporator 10 is received by the drain pan 9 and collected in the drain tank 3.
[0022]
Next, the second dehumidifying mode by the operation of the hygroscopic rotor 15 will be described. When the heater 23 and the first and second blowers 18 and 22 start operation, the first blower 18 causes the second blower path 17 to be drawn from the suction port 5. The air sucked into the air is dehumidified by the moisture in the air absorbed by the wall of the passage 15c by the moisture absorption rotor 15, passes through the first blower 18, and is dried indoors from the front outlet 6 Air is blown out.
[0023]
The hygroscopic rotor 15 starts to rotate slowly around the shaft 15d by the action of the balance of moisture contained in the passage 15c, a small rotating motor (not shown), and the like.
On the other hand, the air is circulated in the third air passage 21 by the rotation of the second air blower 22, but high-temperature air having a low relative humidity passes through the passage 15 c facing the chamber 15 b by the heating of the heater 23, and the second air passage. The moisture absorbed in 17 is discharged to the third air passage 21. Next, the moisture released here is condensed by the sensible heat exchanger 11 being cooled by the air sent from the first air passage 14 to form moisture. After draining into the drain tank 3, it returns to the 2nd air blower 22, and repeats circulation.
[0024]
Next, when the first dehumidification mode and the second dehumidification mode are simultaneously operated, moisture absorption is achieved by efficiently cooling the sensible heat exchanger 11 with the air cooled by the evaporator 10 of the first air passage 14. The amount of dehumidification by the rotor 15 is increased and the efficiency is improved.
[0025]
The dehumidification mode with respect to room temperature will be described with reference to FIG. 5. a is a curve showing the dehumidification capacity of this embodiment, b is a curve showing the dehumidification capacity of a conventional small-sized dehumidifier of the refrigeration cycle type, and c is a conventional curve It is a curve which shows the dehumidification capability of this moisture absorption rotor type dehumidifier.
Since the dehumidifying capacity is extremely reduced in the first dehumidifying mode at low temperatures, the first dehumidifying mode is stopped at low temperatures and the operation is performed only in the second dehumidifying mode that exhibits stable dehumidifying capacity even at low temperatures. There is no noise or vibration due to frost operation, and the conventional refrigeration cycle type dehumidifier requires a defrost operation for operation at room temperature of about 15 ° C or lower, so a two-way valve and bypass circuit for defrost operation are required. However, these are completely unnecessary.
In this embodiment, the first predetermined value A is set to room temperature of about 17 ° C., and the single operation of the second dehumidifying mode is performed below the first predetermined value.
[0026]
Next, when the room temperature is higher than about 17 ° C., the combined use of the first dehumidifying mode and the second dehumidifying mode can exhibit a large dehumidifying capacity similar to that of a large dehumidifier, and the compressor 4 is small for a small dehumidifier. Therefore, noise and vibration can be suppressed to be relatively small.
[0027]
In addition, when the second predetermined value B is set to room temperature 25 ° C. and the temperature is relatively high above the second predetermined value, if the dehumidifying capacity is sufficient even only in the first dehumidifying mode, an automatic or manual dehumidifying capacity changeover switch or the like Thus, the energy saving mode for suppressing the power consumption can be obtained by performing the single operation only in the first dehumidifying mode.
[0028]
Combining the moisture absorption rotor type and the refrigeration cycle type dehumidifier in this way has the same dehumidifying capacity as a large dehumidifier, but is relatively compact and has low compressor vibration and noise, and defrosting operation at low temperature operation. Therefore, it is possible to provide a dehumidifier having a stable dehumidifying ability even at low temperature operation without worrying about vibration and noise.
[0029]
In this embodiment, the condenser 12 is provided in the first air passage 14, but the same effect can be obtained even if it is provided in the second air passage 17.
[0030]
【The invention's effect】
As described above, according to the present invention, by combining a moisture absorption rotor type and a refrigeration cycle type dehumidifier, while having a dehumidifying capacity similar to that of a large dehumidifier, the compressor is relatively compact and vibration and noise of the compressor are small. It is possible to provide a dehumidifier having a stable dehumidifying ability even during low temperature operation without worrying about vibration and noise due to defrost operation even at low temperature operation at room temperature of 15 ° C. or lower.
In addition, during a high temperature operation at room temperature of 25 ° C. or higher, an energy saving mode operation that suppresses power consumption can be performed by performing an independent operation only in the first dehumidification mode.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the same front surface.
FIG. 3 is a schematic system diagram showing the air blowing path and the refrigeration cycle.
FIG. 4 is a block diagram of the control circuit.
FIG. 5 is a graph showing the dehumidifying ability of the conventional example and the example.
[Explanation of symbols]
4 Compressor 10 Evaporator 11 Sensible Heat Exchanger 12 Condenser 14 First Blower 15 Moisture Rotor 17 Second Blower 18 First Blower 21 Third Blower 22 Second Blower

Claims (1)

A third air passage that annularly communicates the second blower, the heater, the moisture absorption rotor, and the sensible heat exchanger, and the second air that sucks indoor air, dehumidifies the moisture by the moisture absorption rotor, and discharges dry air by the first blower. A refrigeration cycle in which a compressor, a condenser, a decompression device, and an evaporator are communicated with each other, and a first air passage that sucks indoor air and cools the sensible heat exchanger and then discharges it with the first air blower The evaporator is located on the leeward side of the sensible heat exchanger in the first air passage, and the condenser is located on the leeward side of the sensible heat exchanger, and the first air passage or the second air passage is provided. provided room temperature sensor, a first dehumidifying mode dehumidification is performed in the evaporator by the operation of the compressor and the first blower, the moisture absorption rotor by the operation of the moisture absorption rotor operation and the first blower and the second blower heater air 2nd dehumidification module that absorbs moisture and dehumidifies And when the value of the room temperature sensor is equal to or lower than the first predetermined value, the operation in the second dehumidifying mode is performed, and the value of the room temperature sensor is higher than the second predetermined value higher than the first predetermined value. In this case, the operation is performed in the first dehumidifying mode, and when the value of the room temperature sensor is between the first predetermined value and the second predetermined value, the first dehumidifying mode and the second dehumidifying mode are A dehumidifier characterized by the provision of a control device that operates in combination.

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