JP2000274732A - Air-conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform suction and evacuation with one axial flow fan and to switch a blow-off direction at a right angle or blow an air flow in a wide direction by providing a first outlet on a front in the same direction as the axial flow fan and collecting the air flow at a second outlet nearly at the right angle to the axial flow by covering the front and surrounding of the axial flow fan. SOLUTION: An axial flow fan 16 for forming a blower is provided, and the shape of a scroll casing 17 is determined by the logarithmic spiral law for forming the blower. A vane 19, namely a lid for controlling wind direction and at the same time closing an outlet, is installed at an upper outlet 18. A shutter 21, namely a lid for controlling wind direction and at the same time closing the outlet is installed at a front and lower outlet 20. An evaporator 1 and a condenser 4 are installed at the downstream side of a suction port 22 being located on the rear surface of a unit. The boss part of the axial flow fan is in a conical trapezoid shape where it is thick at a front side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dehumidifier for dehumidifying moisture in the air, and more particularly to a fan having a high air circulation efficiency.
It relates to a structure that blows out in different directions with high efficiency.

[0002]

2. Description of the Related Art FIG. 8 is a vertical sectional view showing, for example, a first conventional dehumidifier. In the drawing, reference numeral 101 denotes an evaporator provided in an air passage 103 downstream of a suction port 102 provided on the back of the unit. Downstream of which a condenser 104 is provided, and further downstream thereof, a blower duct 105 and a blower 1
An outlet 108 having a variable wind direction vane 107 is provided on the upper surface of the unit through the unit 06. The evaporator 101 is provided with a tank 111 below the drain port 110. On the other hand, the evaporator 101 and the condenser 104 are connected to a compressor 113 mounted on a bottom plate 112 via a refrigerant pipe to constitute a refrigerant circuit.

Next, the operation will be described. Compressor 113
Starts operating, the high-temperature and high-pressure refrigerant gas is supplied to the condenser 10.
4 and the condenser 104 is kept hot. On the other hand, the suction port 1 is
The refrigerant gas in the condenser 104 is cooled and condensed by the air 114 sucked in from the condenser 02, becomes a high-temperature and high-pressure gas-liquid mixed state, flows out of the condenser 104, and further passes through a capillary tube to become a low-temperature and low-pressure refrigerant liquid and evaporator It flows into 101. The refrigerant liquid in the evaporator 101 is heated by the sucked air 114 and evaporates to become low-pressure refrigerant gas, and
It is inhaled to 13. At the same time, suction air 114
Is cooled by the evaporator 109, and the moisture more than the saturated water vapor at the cooled temperature is condensed, received by the drain pan, further falls through the drain port, and is stored in the tank 111. As described above, the suction air 114 cooled by passing through the evaporator 101 and having a reduced absolute humidity is further heated by passing through the condenser 104, passes through the blow duct 105 as room temperature dry air, and is blown by the blower 106. It is discharged above the outlet 108.

[0004] In addition to the original purpose of dehumidifying moisture in the air, a dehumidifier is considered to dry by blowing dry air directly onto a dehumidified object. There is a dehumidifier provided with an outlet. As a second conventional example, FIG. 9 is a diagram showing a structure of a blow-out portion of a two-way blow-out dehumidifier disclosed in Japanese Patent Application Laid-Open No. 5-141705. In the figure, 125 is an intake port,
136 is a cooler, 138 is a condenser, 153 is a blower fan, 126 is a first exhaust port, 127 is a second exhaust port, 1
Reference numeral 62 denotes a wind direction guide plate for switching air blowing to a first exhaust port in FIG. 9A and to a second exhaust port in FIG. 9B. After the air from the inlet 125 on the front side is dehumidified by the cooler 136 and the condenser 138, the air from the blower fan 153 driven coaxially by a motor (not shown) is once collected upward in one direction, and the air is guided by the wind direction guide plate 162. The other portion between the first exhaust port 126 and the second exhaust port 127 is switched to exhaust. As a third conventional example, FIG.
1 is a cross-sectional configuration diagram of a two-way blowout dehumidifier disclosed in Japanese Patent Publication No. 64; In the figure, 133 is a suction port, 135 is an evaporator, 136 is a condenser, 140 is a fan motor, 13
7 is a blower coaxially driven by a motor 140, 132 is a first outlet, 134 is a second outlet, and 131 is an outlet louver. Air is the front air inlet 133
After being dehumidified, the air is blown up and down by a blower 137 and exhausted from a first outlet 132 and a second outlet 134, respectively. However, in the second and third conventional examples, the blower fan 153 and the blower 137 are both sirocco fans, so that the blower is once gathered in a direction perpendicular to the rotation axis, and the blower is switched at the outlet. Has become.

[0005]

The conventional dehumidifier is constructed as described above. In the first conventional example, the exhaust port for dry air is directed in a fixed direction, so that the dehumidifier may be washed with laundry or moisture. There was a problem that dry air could not be sent directly to the tatami mats to dry them. In the second and third conventional examples,
Since the dried air is changed to the axial flow once in the direction perpendicular to the axial flow and then switched to the two directions, there is a problem that the blowing efficiency is reduced.

The present invention has been made in order to solve the above-mentioned problem, and a single axial fan can perform suction and exhaust with high efficiency. In particular, blowout can be performed with high efficiency in the front direction, and the blowout direction can be changed. It is an object of the present invention to obtain an air conditioner that can be switched at a right angle or blow out in a wide direction.

[0007]

An air conditioner according to the present invention has an axial fan having a boss at a central portion for blowing airflow from a suction port on the back to the front, and an axial flow in the axial direction of the axial fan. A first outlet provided on the front surface, a scroll casing that covers the front periphery of the axial fan and collects airflow at a second outlet substantially perpendicular to the axial flow, and a shutter that covers the first outlet; And a vane for covering the second outlet.

Further, in the axial flow fan, the boss at the center of rotation has a truncated cone shape having a larger diameter on the side of the outlet in the axial direction than on the side of the inlet.

Still further, the axial fan has a large center of rotation at a value in which the diameter of the center of rotation on the side of the outlet in the axial flow direction is larger than that of the rear suction port by 15 to 35 degrees with respect to the rotation axis. Truncated cone.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 A specific configuration of a dehumidifier will be described as an example of an air conditioner capable of arbitrarily switching between the high-efficiency blowing of the present invention and blowing in a plurality of directions. FIG. 1 is a front cross-sectional view and a side cross-sectional view illustrating a configuration of an embodiment of a dehumidifier according to the present invention. In the figure, reference numeral 16 denotes an axial fan that forms a blower, and 17 denotes a scroll casing that similarly forms a blower and whose shape is determined by the logarithmic rule. Reference numeral 18 denotes an upward outlet, in which a vane 19 for controlling the wind direction and closing the outlet is installed. Reference numeral 20 denotes a front and downward outlet, in which a shutter 21 for controlling the wind direction and closing the outlet is provided. Reference numeral 22 denotes a suction port on the back of the unit, and the evaporator 1 and the condenser 4 are installed downstream thereof. FIG. 2 is a front sectional view and a side sectional view showing a state where the shutter 21 is closed in FIG. In FIGS. 2 and 3, unlike FIG. 1, the boss portion of the axial fan has a truncated cone shape that is thicker on the front side, as described later in detail. FIG. 3 shows the vane 19 in FIG.
FIG. 4 is a side sectional view showing a state in which is closed. In the drawing, reference numeral 23 denotes the flow of air in the scroll casing 17.

Next, the operation of the dehumidifier having this configuration will be described. When the axial fan 16 operates and rotates, the suction flow into the axial fan 16 is sucked from the suction port 22 on the back of the unit, passes through the evaporator 1 and the condenser 4 sequentially, and then flows to the axial fan 16. And reach. The flow that has passed through the axial fan 16 is as follows.
As shown in FIG. 2, when the shutter 21 installed on the front surface and the downward outlet 20 is closed, the flow 23 blown out from the axial fan 16 flows without a destination in the normal axial flow direction. Therefore, the axial fan 16 bends at right angles from the axial direction 24 to the radial direction 25 of the axial flow fan 16.
The flow scattered in all directions is the scroll casing 17
And the scroll casing 17
Is guided to the upward blowing port 18 and is discharged therefrom as blowing air. At this time, the wind direction is arbitrarily controlled in the front-rear direction in the unit upward direction by the vane 19 installed in the upward outlet 18. When the vane 19 is closed as shown in FIG.
The flow 23 blown out from the outlet is directly discharged from the front surface and the downward blowing outlet as the blown air 23 without changing its direction and along the scroll casing 17. At this time, the wind direction is controlled in an arbitrary direction by the shutter 21 in the forward and downward directions of the unit.

The structure of a high-efficiency boss for efficiently blowing air in both the forward direction and the circumferential direction in which the direction is different from the direction by 90 degrees will be described below. FIG. 4 is a side view of the axial fan 26 used in the present embodiment. In the figure, for example, a three-blade fan is shown. In the figure, reference numeral 27 denotes a blade having a three-dimensional shape, reference numeral 28 denotes a boss for attaching the blade, and reference numeral 29 denotes a rotation axis of the blade 27. The boss portion 28 has an inclination angle in the rotation direction, and has a truncated cone shape having a larger circle on the blowout side. FIG. 5 is an example of a cross section of the blade 27 and the boss 28 shown in FIG. 4 in a plane including the rotation shaft 29 of the blade 27. Boss 28
Has an angle of α with respect to the rotation axis 29, and has a truncated cone shape in which the larger circle is on the blowing side. However, as shown in FIG. 4, the frusto-conical shape may have a cylindrical shape with a certain length in the axial flow direction from the suction side and may have a frusto-conical shape from the middle toward the blowing side. It is important that the angle α be in the range of 15 ° to 35 ° for high efficiency.

Since the dehumidifier has the configuration of the blower shown in FIG. 1, if the angle α is 0 °, the shutter 21 provided on the front and downward outlets 20 is closed. The flow 23 blown out from the axial fan 16 flows in the axial direction 24, directly hits the shutter 21, then bends at right angles in the radial direction 25, and then blows upward along the scroll casing 17. Because it is directed to the mouth 18, it will suffer a very large flow loss. In order to reduce this loss, preferably, as shown in FIGS.
To form a truncated cone with a large blow-out side. As a result, as shown in FIG.
Is closed, the flow blown out from the axial fan 26 flows in the diagonal flow direction 30 to reduce the loss when it is bent in the subsequent radial direction 25, and flows along the scroll casing 17. It is guided to the upward outlet 18. Thus, the blowing performance is improved. on the other hand,
As shown in FIG. 3, even when the vane 19 installed at the upward outlet 18 is closed, the flow blown from the axial fan 26 flows in the diagonal flow direction 30. Without passing along the scroll casing 17, the air directly passes through the shutter 21 of the front surface and the downward outlet 20, and flows out as a blowing wind.

In order to blow air in both directions with high efficiency,
There is an appropriate range for the inclination angle α of the boss. In other words, if the boss inclination angle α is too large, the air blowing performance (a value obtained by converting the flow energy into pressure) when passing through the shutter 21 is reduced, and the air blowing performance is reduced. On the other hand, if the angle α is set to 0 degree also in the scroll casing direction, as described above, there is a loss that the direct flow to the shutter 21 is suddenly changed to a scroll direction different by 90 degrees. The result of experimentally examining the effect of the set inclination angle α on the air blowing performance is shown as a graph of the relationship between the change in the air volume (the air volume / the value dimensionlessly determined by the average air volume) and α when the fan rotation speed is constant.
FIG. 6 shows the scroll direction and FIG. 7 shows the axial flow direction on the front surface. As can be seen from these figures, the boss inclination angle α is 1
If the angle is between 5 ° and 35 °, the vane 19 is closed and the front and lower outlets 20 are closed even when the shutter 21 is closed and the blowing air is blown out from the upper outlet 18.
Even when the blowing air is blown out, the air volume does not extremely decrease. Normal axial fan 16 with boss inclination angle α of 0 °
In comparison with the above, the shutter 21 is closed and the blown air is blown out from the upward blowout port 18 without substantially deteriorating the air volume when the blown wind is blown out from the front side and the downward blowout blowout port 20 when the vane 19 is closed. In this case, the air volume can be improved by about 20%.

Further, by controlling the degree of opening of the vane 19 and the shutter 21 in conjunction with each other, it is possible to simultaneously establish upward blowing and frontal and downward blowing. That is, it is possible to blow out from both directions at the same time, and it is possible to blow out in a wide direction.

[0016]

According to the above arrangement, there is an effect that the direction of the blown air can be switched or expanded in multiple directions, that is, upward, frontward, and frontward downward without lowering the efficiency. Therefore, the direction of the blowing air can be selected according to the application, and the usability is extremely good. There is an effect that the blowing performance is improved, and the dehumidifying ability and the drying efficiency are further improved. In addition, there is an effect that the wind is blown out smoothly in each direction. In addition, in the present invention, by setting the inclination angle of the boss portion to 15 ° to 35 °, there is an effect that the air volume is not extremely reduced in the case of the upward blowing and the case of the front and downward blowing.

[Brief description of the drawings]

FIG. 1 is a front sectional view and a side sectional view of a dehumidifier according to Embodiment 1 of the present invention.

FIG. 2 is a front cross-sectional view and a side cross-sectional view illustrating a flow of wind when a front shutter is closed according to the first embodiment of the present invention.

FIG. 3 is a side sectional view showing a flow of wind when an upper vane is closed according to the first embodiment of the present invention.

FIG. 4 is a side view showing an example of an axial fan of the dehumidifier according to the present invention.

FIG. 5 is a diagram for explaining an inclination angle of a boss.

FIG. 6 is a diagram showing a change in air volume with respect to an inclination angle α when the front shutter of the dehumidifier in the first embodiment is closed.

FIG. 7 is a diagram showing a change in air volume with respect to an inclination angle α when the upper vane of the dehumidifier in the first embodiment is closed.

FIG. 8 is a vertical sectional view of a first conventional example of a dehumidifier.

FIG. 9 is a vertical sectional view of a second conventional example of a dehumidifier.

FIG. 10 is a vertical sectional view of a third conventional example of a dehumidifier.

[Explanation of symbols]

1 evaporator, 2 inlets, 3 air passages, 4 condensers,
5 blower duct, 6 blower fan, 7 blower duct, 8 blower outlet, 9 wind direction variable vane, 10 drain outlet, 11 tank, 12 bottom plate, 13 compressor, 14
Air, 15 drain pan, 16 axial fan, 17 scroll casing, 18 outlet for upward blowing,
19 Vane, 20 Front and downward blow outlet, 21 Shutter, 22 Suction port, 23 Flow blown from axial fan, 24 axial fan axial direction, 25 axial fan radial direction, 26 boss rotation axis Axial fan with directional inclination angle α, 27 blades with three-dimensional shape, 28 boss for mounting blades, 29 axis of rotation of blades, 30 diagonal flow direction.

Claims (3)

[Claims] 1. An axial fan having a boss at a central portion for blowing airflow from a suction port to a front surface, a first blowout port provided on a front surface in the same direction as the axial flow of the fan, and a front periphery of the fan. A scroll casing that covers the first outlet and a scroll casing that covers the second outlet in a direction substantially orthogonal to the axial flow, a shutter that covers the first outlet, and a vane that covers the second outlet. An air conditioner characterized by: 2. The axial flow fan, wherein the diameter of the boss at the center of rotation is larger on the side of the outlet in the axial direction than on the side of the inlet.
The air conditioner according to claim 1, wherein the air conditioner has a truncated cone shape. 3. The axial flow fan has a boss at the center of rotation which is larger than the back suction port at a diameter extending from 15 to 35 degrees with respect to the rotation axis on the side of the outlet in the axial flow direction. 3. A frustoconical shape, characterized in that:
An air conditioner as described.