JPH1147539A - Dehumidifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To defrost an evaporator of a dehumidifier for cooling and dehumidifying indoor air sucked by an air blower by means of a defrosting device having a simple structure without depending on a heater or hot gas. SOLUTION: A dehumidifier is provided with an evaporator 12, a condenser 13 and a reversible rotative propeller fan 10 in this order in a direction from an inlet having a shutter 15 to an outlet having a shutter 16, and is provided with a circulation wind path 19 capable of supplying air in a direction from the condenser 13 to the evaporator 12 by reversing rotation of the propeller fan 10 and circulating hot air which has effected heat exchange with the condenser 13 by closing the shutters 15, 16 and opening shutters 21, 22 which are provided in outlets 17, 18 of the path 19 by wind force at the time of reversing. Thus, a defrosting device of the dehumidifier having a simple structure, which can defrost the evaporator 12 by circulating hot air including heat of the condenser 13, is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidifier for removing moisture from indoor air and sending it out as dry air, and more particularly to a defroster suitable for removing frost adhering to an evaporator during a dehumidifying operation. The present invention relates to a dehumidifier provided.

A dehumidifier has an evaporator and a condenser which form a refrigeration cycle with a fan in the interior of the dehumidifier. The indoor air sucked by the fan is brought into contact with the evaporator to remove and remove moisture, and then passed through the condenser. The air is warmed by the heat and returned to the room as dry air.

[0003] Here, frost adheres to the evaporator during the dehumidifying operation of the dehumidifier, so that defrosting is sometimes required. In this case, conventionally, the evaporator is equipped with a defrost heater, and a method is employed in which electricity is supplied at the time of defrost to perform defrost by the heater heat, or a compressor, a condenser, a capillary tube, and an evaporator in the order of dehumidification operation. There is a hot gas method in which a refrigerant circulating in a refrigeration cycle is directly sent to an evaporator without passing through a capillary tube during defrosting, and defrosted by high-temperature refrigerant gas from a compressor.

[0004]

However, both the heater type and the hot gas type defrosters require a large number of parts such as heaters and valves, and separately require electric wiring and refrigerant pipes, thereby reducing costs. There was a problem that it becomes expensive.

The present invention has been made in view of the above points. When a propeller fan is used as a fan and the direction of rotation is reversed, the flow of wind is also reversed. An object of the present invention is to provide a dehumidifier provided with a simple configuration of a defrosting device which can perform defrosting of an evaporator and does not include a special defrosting device.

[0006]

In order to achieve the above object, the present invention provides a room in which a suction port is provided on one side of an airframe case and a blowout port is provided on the opposite side, and the suction port and the blowout port communicate with the outside. A blower for intake and blowing using a propeller fan is arranged, and an evaporator and a condenser constituting a refrigeration cycle together with a compressor are arranged in this order from the suction port side in front of the blower, and sucked by the blower. In a dehumidifier that passes indoor air through an evaporator and a condenser, cools and dehumidifies moisture contained in the air by the evaporator, and heats the air by the condenser and blows it out as dry air, the blower is driven in reverse rotation. It is possible to blow air from the condenser to the evaporator by reversing the propeller fan, and to provide an air passage through which the wind circulates, and to perform defrosting of the evaporator by the heat of the condenser. It is obtained by the.

Further, the present invention provides a blower for air intake and air blow using a propeller fan in a room in which a suction port is provided on one side of an airframe case and a blowout port is provided on the opposite side, and a room communicating with the outside through the suction port and the blowout port. The evaporator and the condenser constituting the refrigeration cycle together with the compressor are arranged in this order from the suction port side in front of the blower, and the indoor air sucked by the blower passes through the evaporator and the condenser. In a dehumidifier that cools and dehumidifies moisture contained in the air by an evaporator and blows it out as dry air by warming it by a condenser, while using a blower that can be driven in reverse rotation as the blower, The outlet is opened when the propeller fan is rotating so as to draw in room air, and is closed when the propeller fan rotates in reverse and blows air from the condenser toward the evaporator. The hot air blown from the condenser to the evaporator from the condenser generated in the room that has become the closed space when the defrosting is performed is returned to the room by bypassing the room. A circulating air path for circulating the air is provided, and at the air path entrance and the air path outlet provided at both ends of the circulating air path so as to open to the room, a shutter that opens and closes the shutter in an opening and closing operation opposite to the shutter. By providing the air blower in reverse, the hot air that has exchanged heat with the condenser is circulated to perform defrosting of the evaporator.

Further, according to the present invention, an air purifying filter is provided at the suction port, and the shutter is provided behind the air purifying filter. When the propeller fan rotates in reverse and the shutter closes, the suction air and the air are removed. This is to prevent the wind blowing in the opposite direction from hitting the air cleaning filter.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing the internal structure of a dehumidifier. Reference numeral 1 denotes an elongated box-shaped body case of the dehumidifier, which is defined by a partition wall 2 into an upper room 3A and a lower room 3B. Have been. Reference numeral 4 denotes a compressor provided in the lower chamber 3B, and reference numeral 5 denotes a drain water tank for storing drain water dropped from an evaporator described later during defrosting.

In the upper room 3A, a suction port 6 for sucking room air is formed in a front portion thereof by arranging a large number of slits 6a vertically and horizontally, and a suction port 6 is provided in a rear portion thereof. An air outlet 7 for exhausting air is also provided with a large number of slits 7a arranged vertically and horizontally. Further, a cleaning filter 8 for removing coarse dust from the sucked indoor air is attached to the suction port 6.

A blower 9 for sucking and blowing out room air is provided near the outlet 7 in the upper room 3A which communicates with the room through the inlet 6 and the outlet 7. Here, the blower 9 is composed of a propeller fan 10 and a drive motor 11 which can be driven in reverse rotation, and the propeller fan 10 normally rotates to draw indoor air from the suction port 6,
The wind is generated in the direction indicated by arrow A, which directs the air to the outlet 7, but when the drive motor 11 rotates in the reverse direction, the propeller fan 10 also rotates in the reverse direction, as shown in FIG. It is the opposite.

Further, an evaporator 12 and a condenser 13 are arranged in a straight line in that order from the suction port 6 side in front of the blower 9. The evaporator 12 and the condenser 13 are connected to the compressor 4 and a capillary tube (not shown) or the like in an annular manner by a refrigerant pipe to form a refrigeration cycle. In the evaporator 12, a low-temperature refrigerant flows and is in a low-temperature state. The condenser 13 is in a high temperature state through which a high-temperature refrigerant flows. Therefore, the evaporator 12 performs heat exchange so as to cool the sucked indoor air to perform dehumidification, and the condenser 13 performs heat exchange so as to warm the air after dehumidification and performs drying.

The suction port 6 and the outlet 7 are
Shutters 15 and 16 are provided, respectively. When the blower 9 is driven and the propeller fan 10 rotates forward to suck indoor air, the shutters 15 and 16 are opened by the wind force. When the drive 9 stops driving or when the propeller fan 10 reverses and the direction of the wind is reversed, the propeller fan 10 is closed by its own weight.

Then, the blower 9 rotates in the reverse direction,
When the upper and lower chambers 3A and 5A are closed and the upper chamber 3A is in a closed state, the air blowing in the direction of arrow B opposite to the suction air generated in the upper chamber 3A is blown by the air path inlet 17 and the air path outlet 18. Circulating air passages 19 circulating through the upper room 3
It is formed in communication with the upper part of A.

The air path entrance 17 and the air path exit 18
Are also provided with shutters 21 and 22, respectively.
And the shutters 15 and 16 provided in the blower 9
Are opened by the wind in the direction of arrow B, which occurs in reverse. At the same time, the blower 9 is not opened by the suction wind in the direction of arrow A generated by the forward rotation of the blower 9.

Therefore, when the blower 9 is reversed, the wind in the direction of arrow B first passes through the condenser 13 and is warmed to exchange heat with the condenser 13, and the warm air passes through the evaporator 12 and evaporates. Melt the frost on the vessel, and through the circulation air passage 19, arrow B → arrow C → arrow B and the upper room 3A
The situation is circulating to return to.

The operation of the dehumidifier of the present invention is as described above. Next, the operation of the dehumidifier will be described. During the dehumidification operation, the blower 9 rotates the propeller fan 10 in the forward direction to allow the room air to flow through the suction port 6 as shown by the arrow A. Inhale from. When the shutters 15 and 16 at the inlet 6 and the outlet 7 are opened by the wind of the sucked room air, the room air becomes air from which coarse dust is removed from the inlet 6 via the clean filter 8. And are taken into the cabin. Then, it is cooled by contact with the cooled evaporator 12, and the moisture contained in the air is dewed by dew condensation. The condensed and removed water drops from the evaporator 12 and accumulates in the drain water tank 5.

Subsequently, the room air dehumidified by the evaporator 12 passes through the evaporator 12 and then enters the condenser 13 and
The dehumidified air that has touched the high-temperature condenser 13 is heat-exchanged and warmed, and is blown out from the outlet 7 as dry air. Thus, the dehumidifier is operated for dehumidification.

If the dehumidifying operation continues, frost grows on the evaporator 12, and the dew condensation water freezes to deteriorate the heat exchange rate and dehumidification performance, so that defrosting is required.

Therefore, when performing defrosting, a defrosting operation switch (not shown) is pressed. Then, the blower 9 is driven to rotate in the reverse direction.

As a result, the wind generated by the propeller fan 10 is reversed as shown in FIG.
As shown by an arrow B, a wind is generated in the direction opposite to that at the time of suction such as going from the blower 9 to the condenser 13 to the evaporator 12.

In the wind in this direction, the shutters 15 and 16 at the inlet 6 and the outlet 7 are closed, and the shutters 21 and 2 at the inlet 17 and the outlet 18 are reversed.
2 is opened by the wind in the opposite direction, so that the circulation air passage 19 communicates with the upper room 3A. This causes the propeller fan 10 to rotate in the direction of arrow B
The wind blows in the direction and passes through the condenser 13 and the evaporator 12.
It circulates so as to exit the air passage exit 18 from 9 and return into the room 3A.

The wind blown in this direction first passes through the high-temperature condenser 13, so that it is a warm wind that has exchanged heat with the condenser 13. Therefore, the warm wind next passes through the evaporator 12, and the heat melts the frost and icing attached to the evaporator 12 and is defrosted.

Thus, the warm air generated in the room 3A is
Since it circulates through the circulation air passage 19 to and from the upper room, defrosting is performed, and when returning from the air passage outlet 18, the drive motor 11 of the blower 9 is also contacted. Circulates, the air temperature rises, and the evaporator 12 can be more effectively defrosted.

Incidentally, even if the propeller fan 10 is reversed and the wind is directed from the condenser 13 to the cleaning filter 8, the shutter 15 at the outlet 6 is closed.
The wind does not hit the cleaning filter 8, and the dust collected by the cleaning filter 8 does not blow out into the room due to the wind. Even if the drain water generated by the defrost flies in the direction of the outlet 6 due to the wind, since the outlet 6 is closed by the shutter 15, the drain water does not scatter from the outlet 6. In this way, it is prevented that the dust and drain water blow out from the dehumidifier into the room at the time of defrosting so as not to occur unsanitary.

After performing such defrosting operation for an appropriate period of time,
If the operation switch returns to the operation of rotating the blower 9 forward,
The shutters 21 and 22 are closed and the shutters 15 and 16 are opened, and a normal dehumidifying operation in which the room air is sucked and dehumidified by the evaporator 12 is performed.

In the above description, the refrigeration cycle is operated during the dehumidifying operation. However, the refrigeration cycle is stopped, the blower is reversed, and the defrost of the evaporator is performed by the residual heat of the condenser and the drive motor. May be performed.

[0029]

As described above, according to the present invention, the defrosting of the frost on the evaporator of the dehumidifier is performed in line with the evaporator and the condenser along the flow of the suction air flowing from the suction port toward the outlet. The last blower arranged as a blower that can be driven in reverse rotation using a propeller fan, the blower is reversed at the time of defrosting, and blown from the condenser toward the evaporator, the evaporator is heated by the condenser. Defrosting is much easier than a defrosting heater or hot gas defrosting method.
It is possible to make the defrosting device inexpensive.

Further, a shutter is provided at the suction port and the air outlet at a time when the air is normally sucked by the blower, and the shutter is closed when the blower rotates in the reverse direction. In order to circulate the warm air that blows from the condenser to the evaporator in the space, a shutter provided at the air path inlet and the air path outlet at both ends is provided with a circulation air path that opens and opens, and the evaporator circulates. With the warm air where the air temperature rises, more effective defrosting can be performed.

Further, when there is an air cleaning filter in the suction port, when the propeller fan rotates in reverse and hot air blows toward the suction port side to defrost the evaporator, the shutter of the suction port is closed. There is no danger that frost water will come out of the suction port and wet the room, and since the wind does not hit the air purifying filter with the closed shutter, there is no danger of discharging the collected dust, thus providing good hygiene dehumidification. Machine can be provided.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view schematically showing an internal structure of a dehumidifier according to the present invention, showing a state during a dehumidifying operation in which room air is sucked.

FIG. 2 is a vertical cross-sectional side view schematically showing the internal structure of the dehumidifier in a state where the blower is reversed and the blower is blown from the condenser to the evaporator to perform defrosting.

[Explanation of symbols]

 3A Upper Room 6 Suction Port 7 Blow Out Port 8 Air Purification Filter 9 Blower 10 Propeller Fan 12 Evaporator 13 Condenser 15, 16, 21, 22 Shutter 17 Airway Inlet 18 Airway Outlet 19 Circulating Airway

Claims (3)

[Claims] An air inlet and an air blower using a propeller fan are disposed in a room which communicates with the outside through a suction port provided on one side of the body case and an opposite side on the opposite side. An evaporator and a condenser constituting a refrigeration cycle together with a compressor are arranged in this order in front of the blower from the suction port side, and the indoor air sucked by the blower is passed through the evaporator and the condenser, thereby forming an evaporator. In the dehumidifier which cools and dehumidifies the moisture contained in the air and warms it by a condenser and blows it out as dry air, the blower can be driven in the reverse direction, and the propeller fan rotates in the reverse direction to change the evaporator from the condenser. A dehumidifier having a configuration in which an air path is provided to blow air to the air and the air is circulated, and the evaporator is defrosted by the heat of the condenser. 2. An air inlet and an air blower using a propeller fan are arranged in a room communicating with the outside through the air inlet and the air outlet on one surface side of the body case and an air outlet on the opposite surface side. An evaporator and a condenser constituting a refrigeration cycle together with a compressor are arranged in this order in front of the blower from the suction port side, and the indoor air sucked by the blower is passed through the evaporator and the condenser, thereby forming an evaporator. In the dehumidifier that cools and dehumidifies the moisture contained in the air by heating and blows out as dried air by the condenser, while using a blower that can be driven in reverse as the blower,
The inlet and the outlet are provided with shutters that are opened when the propeller fan is rotating to suck indoor air, and are closed when the propeller fan rotates in reverse and blows air from the condenser toward the evaporator, respectively. A circulating wind that circulates hot air that is blown from the condenser toward the evaporator from the condenser to the evaporator and is returned to the room by bypassing the room when the shutter at the time of defrosting is closed and becomes a closed space. Air passage inlets and air passage outlets provided at both ends of the circulating air passage so as to open to the room are provided with shutters for opening and closing the shutter in an opening and closing operation opposite to the opening and closing operations of the shutter, respectively. The dehumidifier characterized in that the defrosting of the evaporator is performed by circulating the hot air that has exchanged heat with the condenser by reversing the above. 3. An air purifying filter is provided at the suction port, and the shutter is provided behind the air purifying filter. When the propeller fan rotates in the reverse direction and the shutter is closed, the air is filtered in the opposite direction to the suction air. The dehumidifier according to claim 2, wherein the blowing wind does not hit the air cleaning filter.