JPS6118035B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric fan using an air conditioning fluid system element.

A conventional electric fan will be explained with reference to FIG. Reference numeral 1 denotes a base of the electric fan installed on the floor, 2 a column erected on top of the base, 3 a head of the fan that is vertically supported on the column 2 via a neck piece 4, and a drive motor and a neck. Swing mechanism (none shown)
The drive motor is provided with a blade 7 which is fastened to the rotating shaft 5 of the drive motor by a spin nut 6. 8 is a two-part protective net that covers the blade 7. In use, the drive motor is rotated by operating the power switch and the blades 7 blow air. In addition, the air blowing direction can be set to a single direction according to the user's selection, and the head 3 can be periodically rotated from side to side by a swinging mechanism provided inside the head 3.
It is now possible to switch the air flow over a wide range.

The electric fans configured as described above that are currently in common use have several drawbacks as shown below. In other words, the blower blades are covered with a protective net for safety reasons, but due to the structure, there is a risk that curtains, etc. may be drawn in from the back of the protective net, and there is also a risk that children may It is extremely dangerous because fingers can be inserted directly into it, which can result in severed fingers or injury. For this reason, a device that detects when a hand touches the protective net and instantly stops the rotation of the blades has already been put into practical use, but as it has not spread to all households, conventional electric fans At present, the problems with this type of electric fan, such as the possibility of being used as a prank by mistake or being used as a prank when it malfunctions, have not yet been resolved.

The blowing direction is expanded by periodically rotating the head of the fan from side to side using a head-down mechanism, but in order to rotate the head, which has a drive motor etc. inside, a swing mechanism is used. It needs to be quite strong, and recently improvements have been made to allow adjustment of the angle of elevation and elevation, and the mechanism has become quite complex.

The upper part of the fan, which includes the motor, was heavy and lacked stability, making it easy to tip over and creating a sense of danger.

As mentioned above, the electric fan itself consists of a base, a support, and a head, so when not in use, it is not only troublesome to store it in a case, but also the case is large. There were problems such as taking up storage space.

Since it only functions as an electric fan, it can only be used for one season, lacks versatility, and is extremely uneconomical.

The present invention solves the above-mentioned drawbacks,
In particular, safety is improved by making the air blower a box type that is housed in a case, and the fluid blowing direction expansion type element can further expand the air blowing direction, that is, switch between blowing air in a single direction and blowing air over a wide range. By using this, the purpose is to make it possible with a completely new configuration without having to drive the blower section left and right.

In addition to its function as an electric fan, its other purposes include
It is possible to add functions such as a warm air fan or a dryer as an auxiliary function, and the purpose is to obtain an extremely economical electric fan by improving its versatility.

Hereinafter, the present invention will be explained with reference to the drawings.

In FIGS. 2 to 4, reference numeral 9 denotes a fan body having various functional parts provided therein, and has an air outlet 10 on its front surface and an air suction port 11 on its side surface.

Reference numeral 12 denotes a cross flow fan for blowing air, which is connected to an electric motor (not shown) to rotate. Reference numeral 13 denotes a back guider of the cross flow fan 12, and 14 a vortex stabilizer plate, which together with the back guider 13 forms an air flow passage 15, one end of which is opened to the air intake port 11, and the other end thereof is opened to the air outlet 10. ing. Reference numeral 16 denotes a fluid blowing direction enlarged element disposed between the airflow passage 15 and the air blowing port 10, the details of which will be described later.
17 is a switching dial for changing the blowing direction by the fluid blowing direction enlarging element 16, and 18 is a branch exhaust port. 19 is a filter for rectifying the airflow and removing dust, etc. 20 is an operating section such as a power switch provided on the front of the main unit, 21 is a guard provided at the air outlet 10, and 22 is an electric motor for the cross flow fan 12. A cooling air intake port is used to cool the motor and electrical parts, 23 is a leg that supports the main body, and 24 is an electric heater for heating or drying with hot air. Note that this electric heater 24
There is no particular need for this.

By the way, the fluid ejection direction enlarging type element 16, which is the most important element in the present invention, will be described in detail.

5 and 6 show a conventional device using a fluidic element for changing the flow direction of fluid. In FIG. 5, 25 is formed symmetrically around the center line x-x. It is a fluidic element. 2
6 is its supply nozzle, which is formed of parallel straight sections. Control rooms 27 and 28 are communicated with the atmosphere through control ports 29 and 30, respectively.

31 and 32 are side walls.

The operation of the constituent fluid element 25 when used as an air blowing direction changing device will be described next. First, when both control ports 29 and 30 are opened to the atmosphere, the airflow flowing out from the supply nozzle 26 tries to flow along the center line There is a strong tendency to deflect to flow along either side of the wall.

Next, the control port 30 is isolated from the atmosphere,
Assuming that the control port 29 is open, the flow emitted from the supply nozzle 26 will entrain the fluid between the side wall 32 and the flow, since there is no atmospheric air flowing in from the control port 30, and the flow will flow between the side wall 32 and the flow at a pressure below atmospheric pressure. Set to pressure value. On the other hand, the control room 27 is maintained at approximately atmospheric pressure by the inflow of air from the atmosphere. Therefore, a pressure difference is created transversely to the flow and the flow is directed towards the side wall 32.
deflected to the side. This effect is self-reinforcing and the flow adheres to the sidewall 32 and flows away.

At this time, the supply nozzle 26 is regulated so that there is almost no deflection in the flow direction upstream of the nozzle. That is, the vector A of the flow center at the nozzle outlet is the same as the direction of the central axis of the nozzle.

Therefore, in order to obtain a large deflection angle at the element exit, the side wall 32 must be curved in a large arc, and the total length L of the element 25 must be at least 5 to 6 times the nozzle width _Ws . It was hot. Moreover, this adhesion of current is self-reinforcing, making continuous direction change control difficult. Naturally, it is also difficult to blow out air in a stable manner in any direction.

Next, another conventional row shown in FIG. 6 will be described. Reference numeral 33 designates fluid elements formed symmetrically about the center line XX. 34 is a fluid inlet; 35, 3
6 is a fluid outlet. 37 and 38 are control rooms, 3
9, 40 are edges delimiting the control chambers 37, 38 and the outlets 35, 36. Each control room 37, 3
8 are connected to conduits 43, 44 with valve devices 41, 42. 45 and 46 are control units.

The operation of the above configuration will now be described. When both valve devices 41 and 42 are opened, the fluid flow is deflected toward the outlet of the control chamber where the pressure has become low for some reason.

Next, when the valve device 41 is closed and the valve device 42 is opened, the flow from the inlet 34 creates a macroscopic vortex in the control chamber 37 due to the action of the restriction part 45, and this chamber 37 The pressure is lower than 38,
The direction of the flow is determined by this differential pressure toward the outlet 35. Further, when the opening and closing of the valve devices 41 and 42 are reversed and the pressure difference between the control chambers 37 and 38 is reversed, the flow is directed to the outlet 36. The action that changes the flow is like a flip-flop. The deflection of the flow in this case is caused by the restriction part 4 corresponding to the nozzle.
The deflection is caused by a vortex generated in the control section 37 or 38 on the downstream side of the deflector 5 or 46, and since the Coanda effect is not utilized in the deflection, the deflection is caused only by the vortex chamber. Therefore, it is not possible to take a large deflection angle over a short distance. Furthermore, since the purpose is flip-flop switching, there are two output ports, and proportional deflection of the flow is not possible. Further, even if it were possible, it would not be possible to widen the range of continuous control of flow deflection.

As mentioned above, conventional fluid elements cannot have a large flow deflection angle, and the distance from the inlet to the outlet is long in terms of element length, so they cannot be used to change the direction of air flow from an electric fan. Nakatsuta. Therefore, the applicants have already developed a fluid blowing direction expanding type element that has a short distance from the inlet to the outlet, is capable of deflecting the flow direction over a wide range, and is capable of continuously deflecting the flow.
It was proposed in patent application No. 52-52276.

The present invention focuses on the fact that this fluid blowing direction enlarging type element is extremely excellent for changing the blowing direction of an electric fan, and next, this fluid blowing direction expanding type element 16 will be explained.

In FIGS. 7a and 7b, 47 is an upstream chamber;
It is defined by side walls 48, 49 and end walls 50, 51. Nozzles 52 and 53 are formed at the inner ends of the end walls 50 and 51. This nozzle 52,
53 is formed at a position equidistant from the side walls 48 and 49, and has a cross-sectional shape of a quarter circle.
Control chambers 54 and 56 are formed immediately downstream of the nozzles 52 and 53, and include end walls 50 and 51, side walls 56 and 57, and a wall 5 parallel to the end walls 50 and 51, respectively.
8 and 59, and control ports 60 and 61 are bored in side walls 56 and 57, respectively.
Note that openings 62 and 63 are formed in the side surfaces of the fluid flow passages of the control chambers 54 and 55, that is, the surfaces facing each other. Control plates 64 and 65 are arranged to open and close the control ports 60 and 61. 66,67
is a guide wall extending downstream from the openings 62, 63 of the control chambers 54, 55, and is formed in a substantially arc shape so that the width of the flow passage between the guide walls 66, 67 gradually increases toward the downstream. It is formed by bending. 68,
Reference numeral 69 indicates the apex of each of the guide walls 66 and 67. The nozzle opening is rectangular. The entire device 16 is symmetrical about the centerline x-x in the direction of fluid flow.

Regarding this effect, when the control ports ₆₀ and 61 are open as shown in _FIG . The entire outlet flow is in the centerline x-x direction, ie in the direction of arrow N.

Now, as shown in FIG. 7b, when the control plate 64 closes the control port 60, the inflow of the atmosphere at the flow rate indicated by the arrow _e2 is blocked. Here, nozzle 5
Center line between 2, 53 and the vertices 68, 69 of the guide plate
When the dimension S _e in the direction perpendicular to -x is assumed, a negative pressure is generated in the control chamber 54 due to the flow velocity e ₂ . That is, negative pressure is generated in the opening 62. Control room 54, 55
The flow is deflected to the right due to the pressure difference between the openings 62 and 63, but at this time, the width W _u of the upstream chamber 47 is wider than the nozzle width W.
In addition, since the thickness of the nozzles 52 and 53 is thin, the pressure difference at the nozzle outlet directly affects the flow state on the upstream side of the nozzle.
Deflection occurs from the upstream side of 53. The nozzle exit flow velocity is shown by arrows e ₃ and e ₄ , and the flow velocity e ₄ is the flow velocity
It has stronger straightness than e ₂ .

Therefore, the overall flow at the nozzle exit is the center line ×
- Go in the direction of arrow P inclined by an angle γ ₁ . This flow causes a Coanda effect and is further deflected by the guide wall 66. According to experiments, when W _u /W is about 3, the deflection angle γ ₂ shows a value of about 60°.

When it is desired to deflect the flow direction to the left, the control plate 64 is moved away from the control port 60 to open the control port 60, completely opposite to the case shown in FIG.
5, the control port 61 may be closed. By adjusting the opening degrees of both control ports 60 and 61, the deflection direction of the fluid can be stably determined in any direction between both guide walls 66 and 67, and the deflection angle can be continuously adjusted. You can also change it. Furthermore, since the flow has already been deflected on the upstream side of the nozzle and is deflected by the Coanda effect of the guide wall, the overall deflection angle can be increased.

In addition, in FIG. 7, for the sake of explanation, the central axis of W _u and W
The essential point is that when the control ports 60 and 61 are opened, the flow passing through the nozzle travels straight when the flow flowing out from the upstream chamber 47 is asymmetrical. .

Next, the structure of the control section that controls the direction of the airflow blown out from the fluid blowout direction enlarged element 16 will be explained.

FIG. 8 explains the specific configuration of the control section.

First, in the basic configuration of FIG. 7, the control port of the fluid blowing direction enlarged element 16 is
7, but in the fan device of the present invention,
One axial end of the element 16 is closed by a closing plate 70, and the other end is used as a control port.

By the way, 71 is the fluid blowing direction enlarged element 16.
A cover that closes the other end of the control room 5
Openings 72 and 73 are provided only in the portions facing 4 and 55. Reference numeral 74 denotes a spacer provided at the bottom of the cover 71, which forms openings 75 and 76. Reference numeral 77 denotes a substrate on which fan-shaped openings 78 and 79 are provided symmetrically.
4, and the openings 75 and 76 are formed as independent chambers. In addition, the control room 55 and the opening 78,
The control chamber 54 and the opening communicate with each other through openings 75 and 76 of the spacer 74, respectively.
The switching dial 17 is rotatably mounted, and has fan-shaped openings 80, 81 symmetrically formed in the center thereof, and four openings 82a, b,
c and d are formed. The openings 80 and 81 are for continuously deflecting the air blowing direction left and right, the opening 82 is for manual adjustment, and the opening 83 is for symmetrically deflecting the fan-shaped openings 84 and 85. This is the aperture plate provided. 86 is a closing plate, 87
is a gearbox, and 88 is an impeller, which rotates in response to a portion of the air flow, and its rotation is reduced by a gear built in the gearbox 87, causing the blocking plate 86 to rotate at a low speed. They are connected like this. Note that a part of the airflow that rotates the impeller 88 is discharged from the controlled flow exhaust port 18 provided on the front surface of the main body 9. Also, the air flow impeller 8
By controlling the amount sent to occlusion plate 8
It is also possible to control the rotation of 6.

The operation of the present invention configured as described above will be explained.

First, the operating section 20 provided on the front of the electric fan body 9
When the power switch is turned on, an electric motor (not shown) is driven, and the cross flow fan 12 connected to the electric motor is rotated. This cross-flow fan 12 is provided with a back guider 13 and a vortex stabilizer plate 14, and by these actions, an air flow is formed as shown by the arrow as the cross-flow fan 12 rotates. Therefore, the air sucked in from the air suction port 11 passes through the air flow path 15, and after removing dust etc. by the filter 19, it passes through the nozzles 52, 53 of the fluid blowing direction enlarged element 16, and at this time, ,
The air is blown out in either direction depending on whether the control port is opened or closed.

Here, the airflow deflection control will be specifically explained with reference to FIG. 9.

First, when the air flow blown from the fluid blowing direction expansion type element 16 is to be deflected continuously and automatically in the left and right directions with a certain period, the switching dial 17 is set to the automatic position. That is, when the switching dial 17 is automatically set, its openings 80, 81, and 82 are positioned as shown in FIG. 9a. In this case, the opening 80 communicates with the opening 78 of the substrate 77, the opening 75 of the spacer 74, and the opening 72 of the 75 cover 71, and the opening 81 communicates with the opening 79 of the substrate 77, and the opening 72 of the spacer 74. part 76, opening 7 of cover 71
3 and therefore the control plates 54, 5
5 are openings 81 and 8 of the switching dial 17, respectively.
0 to the atmosphere. Note that the openings 82a, b, c, and d are all closed by the substrate 77.

Here, the impeller 88 is the cross flow fan 12
It is constantly rotating in the direction of the arrow due to the flow of a part of the airflow formed by. This rotation is transmitted to the gear box 87, decelerated to an appropriate speed, and then transmitted to the closing plate 86, so that the closing plate 86 is also constantly rotating in the direction of the arrow. This rotational speed determines the period at which the airflow is deflected left and right, and the rotational speed can be adjusted, for example, by adjusting the amount of airflow that rotates the impeller 88 or by changing the gear ratio of the gearbox 87. It can be adjusted freely by changing it. Moreover, a small electric motor may be used instead of the impeller 88. By the way, this closing plate 86 is connected to the openings 80 and 81 of the switching dial 17.
It is designed to open and close.

First, the closing plate 86
If both control chambers 54 and 55 of the fluid blowing direction enlarged element 16 are located in a place where they are not blocked,
is open to the atmosphere and therefore nozzle 5
The incoming airflow of
6 and 67, and went straight ahead. Next, the closing plate 8
6 is positioned so as to close the opening 80,
The control chamber 55 is blocked from communicating with the atmosphere, and the airflow from the crossflow fan 12 is directed to both control chambers 54, 5.
Due to the pressure difference of 5, when flowing into the nozzles 52 and 53, its direction is deflected to the right in FIG. 9a. Further, the incoming airflow is largely deflected to the right by the Coanda effect of the guide wall 66 and is blown out from the air outlet 10. Conversely, if the closing plate 86 is positioned so that the opening 81 is closed, the air will be blown out to the left by the same action. By the way, since the closing plate 86 is constantly rotating in the right direction (arrow), the opening 81, for example, gradually changes from fully open to fully closed, and then gradually opens from fully closed to fully open. Become. During this time, since the opening 80 is always open, the airflow is gradually deflected from the air outlet 10 toward the center of the air outlet 10 to the left side, and completely switches to blowing from the left side. Furthermore, it is gradually deflected toward the center, and eventually returns to a balloon emanating from the center. Further, the closing plate 86 has the opening 80
Therefore, the airflow that returned to blowing from the center is gradually deflected to the right, completely switching to blowing from the right, and then gradually changing to blowing from the center. Head over. Since the closing plate 86 is always rotating at a constant speed, the above operation is repeated, and the air flow blown out from the air outlet 10 is continuously switched from side to side at a constant cycle.

Next, manual adjustment of the air blowing deflection angle will be described with reference to FIG. 9b.

To manually adjust the deflection angle, use the switching dial 17.
This is done through the openings 82a, b, c, d of
The openings 80 and 81 are designed so that they are always closed by the substrate 77 no matter which opening is in communication with the openings 78 and 79 of the substrate 77.

First, a case will be described in which air is completely blown from the right side. When the switching dial 17 is set to the right air outlet, the position of the opening 82 of the switching dial 17 becomes as shown in FIG. 9b. That is, the opening 8
2b communicates with the opening 79 of the substrate 77, the opening 76 of the spacer 74, and the opening 73 of the cover 71, and the opening 78 of the substrate 7 communicates with the switching dial 17.
It is blocked by. Therefore, the control chamber 55 of the fluid blowout direction enlarged element 16 is blocked from communicating with the atmosphere, and the control chamber 54 is closed to the opening 82 of the switching dial 17.
It is in communication with the atmosphere via b. In this state, the airflow from the crossflow fan 12 is caused by the pressure difference between the control chambers 54 and 55, that is, the control chamber 5
5 is lower than the pressure in the control chamber 54, when flowing into the nozzles 52 and 53, it is deflected to the right,
Inflow. The inflowing airflow is further deflected to the right by the Coanda effect of the guide wall 66, is blown out from the air outlet 10, and maintains this state.

Next, when switching to blowing air to the left,
By rotating the switching dial 17 to the right, only the opening 82c communicates with the opening 78 of the substrate 77, and the opening 79 is closed by the switching dial 17. Therefore, similar to the effect described above, the air flow is deflected to the left by the lower pressure control chamber 54 and the nozzles 52, 5
3. The air is further enlarged and deflected by the guide wall 67, and after switching to blow out from the left side of the air outlet 10, this state is maintained. Next, when blowing air from the center, by rotating the switching dial 17, the opening 82a is connected to the opening 79 of the board 7, and the opening 82d is
By communicating with the opening 78, both control chambers 54, 55 of the fluid blowing direction enlarged element 16 may be communicated with the atmosphere. Also, switching dial 1
By rotating the openings 82a, b, c, and d, the communication state of the openings 82a, b, c, and d is closed, so that an arbitrary blowing direction can be obtained.

Next, FIG. 10 shows a configuration in which vanes 89 are attached to the nozzle portion by a shaft 90 for the purpose of uniformizing the flow velocity distribution of the air flow blown out from the air flow passage 15 and also directing the flow. Also, as shown in Figure 11,
If a transparent body 92 is provided in a part of the main body on which a vanity table 91 is placed so that items can be easily placed above, and a lighting lamp 93 is added inside, it can be used as a fan device when used in a bedroom or the like. It is convenient because it doubles as a lighting stand. Furthermore, as shown in FIG. 12, other means of daily life such as a radio 94 or a blinking clock are added to enhance the effectiveness of the fan device. It is also possible.

As explained above, the present invention has a box type air blower housed in a case, and
A fluid blowing direction expanding type element is arranged in the blowing part,
A device that blows air in a single direction and deflects the airflow continuously and automatically over a wide area in the left and right directions, and also allows the airflow direction to be fixed at any position. Therefore, it can exhibit excellent effects as shown below.

a The blower device is housed in a case, and the fluid blowing direction expansion type element disposed in the blowing part is
Since there is no moving part in deflecting the blowing direction,
Not only can you not insert your hand or a pencil into the blower, but there is no problem even if you touch the fluid blowing direction expanding element through the air outlet, and there is no risk of tipping over like with conventional fans. However, its safety is extremely high compared to electric fans.

b The deflection of the air blowing direction does not require the use of a fairly complicated mechanism to rotate the entire head containing the air blowing part as in the past, but can be done by rotating a switching dial, which is the operating part of the control unit, which is simply constructed. Only with
This can be done without rotating the air blowing section, and without having to open and close the left and right control ports separately as in conventional devices, improving the reliability and durability of the device.

Moreover, the deflection range can be extended to an extremely wide range, which cannot be achieved by simply incorporating a conventional fluid element, and the direction of the air can be fixed at any location.

c The main body of the fan device does not have a complicated structure consisting of the fan head, blower part, support part, and base like in the past, and the storage case only needs to be slightly larger than the main body, saving storage space like in the past. It doesn't take a lot of space.

Additionally, the storage case can be used for other purposes, such as as a stand, and if configured to have other functions, such as an electric heater, the hot air fan can be used as a dryer, improving its versatility. In addition, there is no need to separately purchase a hot air fan, so it is extremely economical.

d) Cooling fans that utilize outdoor air by attaching the fan body to a window, etc. so that the air inlet is located outdoors, or by connecting a dedicated duct to the air inlet and opening one end to the outdoors. It can be used as

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional electric fan, Fig. 2 is an external view of a fan device showing an embodiment of the present invention, Fig. 3 is a cutaway perspective view of the same, Fig. 4 is a cross-sectional view of Fig. 3, 5 and 6 are cross-sectional views of conventional fluid elements, and FIG. 7 is a cross-sectional view of a fluid blowing direction enlarged type element which is the main part of the present invention, where a shows the case where the blowing direction is straight, and b shows the case where the blowing direction is straight. This is a case where the blowing direction is deflected to the right. 8th
The figure is an exploded perspective view of the control section of the fluid ejection direction expansion type element, FIGS. 9a and 9b are both explanatory views of the control operation, and FIG. 10 is a cross-sectional view of the device showing another embodiment.
11 and 12 are perspective views of a fan device showing still another embodiment. 9...Main body, 10...Air outlet, 11...Air suction port, 12...Cross flow fan, 15...
... Air flow path, 16 ... Fluid blowout direction enlarged element, 24 ... Electric heater, 52, 53 ... Nozzle, 54, 55 ... Control room, 60, 61 ... Control port, 66, 67 ... Guide Wall, 93...lighting lamp, 64...radio.

Claims (1)

[Scope of Claims] 1. An air flow passage having one end opened to the air intake port and the other end opened to the air outlet is formed inside the main body in which an air intake port and an air outlet are formed, and this air flow passage A blower device driven by an electric motor is located at the air intake port, and the air sucked from the air suction port is directed through a fluid deflecting means including a nozzle portion with a sharply constricted flow path on the upstream side, and a curved guide wall. The fluid is blown into the room through a fluid blowing direction expansion type element having a structure, and the element is provided with a control part for controlling the blowing direction, and this control part has a communication path connected to two control ports provided in the element. , a fan-shaped opening connected to the communication path, and a switching dial adjacent to the fan-shaped opening, and by rotation of the dial, the control opening is placed at a position where the opening area of the fan-shaped opening can be continuously changed. A fan device equipped with 2 Using a cross flow fan as a blower,
2. The electric fan device according to claim 1, wherein a fluid blowing direction expanding type element is provided in parallel to the cross flow fan. 3. The electric fan device according to claim 1, wherein the control section is configured to periodically deflect the air blowing direction and to manually fix the direction at any desired position. 4. The fan according to claim 1, characterized in that one end in the axial direction of the fluid blowing direction expanding element is closed, and the other end is open only to a control chamber, and the opening is used as a control port. Wind device. 5 Inside the main body, an electric heater, a lighting lamp,
The electric fan device according to claim 1, characterized in that it is constructed by adding one or more of other living means such as a sound means such as a radio and a time notification means such as a clock.