JPH0419395Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an improvement of a ceiling-suspended air conditioner, and particularly to one that achieves a uniform indoor temperature distribution during low air volume operation.

(Prior Art) Conventionally, as shown in FIGS. 6 and 7, this type of ceiling-suspended air conditioner has a front air outlet 4 and a bottom surface, respectively, on the front and bottom surfaces of the indoor unit main body 1 suspended from the ceiling. Some devices are known in which the blower outlet 5 is opened, and the one shown in FIG. Make sure to blow the air downward, and open the front air outlet 4.
The aim is to measure the uniform temperature distribution in the room by using the forward air blowing from the inside (see Japanese Utility Model Publication No. 58-39323).

In addition, in the one shown in FIG. 7, the angle of the damper 29' that supports the center of one flat plate is changed up and down,
The front air outlet and the lower air outlet are switched to obtain a uniform indoor temperature distribution.

(Problems to be solved by the invention) However, although the conventional device shown in FIGS. 6 and 7 can secure a certain degree of air velocity and provide a good temperature distribution in the room when the air volume is high, in reality, Due to noise concerns, it is rarely operated at a high air volume, and is often used at a medium or low air volume with less noise, and in the case of the one shown in Fig. 6, the area of the air outlet increases when the opening/closing damper 29 is opened. In addition, in the case shown in Figure 7, the area of the outlet is constant regardless of the air volume, so there is a problem that the air speed is not sufficient, especially when the air volume is low, and the temperature distribution in the room is not good due to the decrease in wind speed. .

(Means for Solving the Problems) Therefore, as a means for solving the above problems, the present invention provides a variable air volume fan for a ceiling-suspended air conditioner, as illustrated in FIGS. 1 to 5. A front air outlet 4 and a lower air outlet 5 for blowing out conditioned air are provided respectively on the front and lower front of the indoor unit main body 1 having a
An opening/closing damper 9 is disposed on the upstream side of the opening/closing damper 9, and the angle formed by the two blades 10, 10 constituting the opening/closing damper 9 is reduced or expanded so that the blowing wind speed remains approximately constant in conjunction with the level of the air volume. It is something.

(Function) The present invention uses the above-mentioned means to reduce the angle formed by the two blades 10, 10 constituting the opening/closing damper 9 to increase the opening area of the outlet when the air volume is changed to a high air volume. In this case, by enlarging the angle mentioned above to make the opening area of the outlet small and keeping the air volume almost constant, the wind speed at low air volume is almost the same as the wind speed at high air volume. This is to obtain a uniform temperature distribution in the room, which is almost the same as the time.

(Embodiment) A ceiling-suspended air conditioner as a preferred first embodiment of the present invention will be described in detail below with reference to FIGS. 1 and 2.

Reference numeral 1 denotes an indoor unit that is hung with its rear side facing a corner of the ceiling of the room. Inside the indoor unit 1, there is a Sirotskov fan 2 whose rotation speed is variable and air volume is variable, and an indoor heat exchanger 3. Each has a built-in
Although not shown, it is connected to an outdoor unit equipped with a compressor via refrigerant piping.

Thus, a front air outlet 4 is provided on the front side of the indoor unit main body 1, and a lower air outlet 5 is provided on the downstream side of the indoor heat exchanger 3 on the downstream side of the indoor heat exchanger 3 with a partition wall 6 in between. They are equally drilled. 7
and 8 are a front grill and a lower grill provided at the front air outlet 4 and the lower air outlet 5, respectively, and formed by combining a plurality of blades (three in the figure);
The hot air is rectified and blown out to the front and lower edges of the indoor unit main body 1, respectively.

Reference numeral 9 denotes an opening/closing damper which is a feature of the present invention. , and arranged downstream of the indoor heat exchanger 3.

As shown in FIG.
The blades 10 are rotated around the shaft 12 by forming the blades 10 to 12.
Note that the shaft 12 is supported by the indoor unit main body 1 as appropriate.
A compressible spring 13 is stretched between one end of the blade 10 in the longitudinal direction, an oval cam 14 is arranged between the other end, and the cam 14 is moved electrically or manually.
When the long axis of the oval cam 14 coincides with the direction of the hinge 11, the contracting force of the spring 13 causes the two blades 10,
When the short axes coincide, the contraction force of the spring 13 is overcome and the blades 10 are pushed outward to maximize the opening.

15 is a control device for the Sirotskov fan 2 and the oval cam 14;
At the same time, the rotation speed of the elliptical cam 14 is linked with the change in the rotation speed of the Sirotskov fan 2 to change the air volume due to the change in the rotation speed of the Sirotskov fan 2. At the maximum (H), intermediate (M) and minimum (L), the opening degrees of the blades 10, 10 are inversely linked so as to be the minimum, intermediate and maximum, respectively.

The indoor unit of the ceiling-suspended air conditioner configured as above is hung with its rear side facing the corner of the ceiling of the room, and the outdoor unit is connected with refrigerant piping, and the refrigerant discharged from the compressor of the outdoor unit is used to generate indoor heat. It is guided to an exchanger 3 and exchanges heat with the indoor air blown out from the Sirotskov fan 2 to heat the room.

At the beginning of heating, the control device 15 turns on the Sirotskov fan 2.
The rotational speed of the opening/closing damper 9 is maximized to obtain a high air volume (H), and in conjunction with this, the long axis of the oval cam 14 is aligned with the direction of the hinge 11 as shown by the solid line in FIG. When the opening degree of the blades 10, 10 is minimized, the opening area of the air outlet is wide commensurate with the high air volume, sufficient wind speed is ensured (solid line arrow in Figure 1), and hot air is distributed through the front air outlet 4 and the bottom surface. The air reaches the corners of the room from the air outlet 5, resulting in good temperature distribution and a good heating start-up.

When the temperature of the room rises, a low air volume is used due to noise concerns. At this time, the control device 15 controls the rotational speed of the Sirotskov fan 2 to the minimum, so that the oval cam 14 is operated as shown by the dotted line in Figure 2. The short axis is made to coincide with the direction of the hinge 11, and the opening degree of the two blades 10, 10 is expanded to the maximum by resisting the contraction force of the spring 13. Then, the opening areas of the front air outlet 4 and the lower air outlet 5 are sandwiched in proportion to the decrease in air volume due to the expansion of the opening degree of the opening/closing damper 9, and the air outlet speed becomes approximately equal to the wind speed when the air volume is high (the 1), the temperature distribution in the room is as good as when the air volume is high.

Next, a second embodiment having an opening/closing damper 9' shown in FIGS. 3 and 4 will be described. In addition,
In this embodiment, the parts other than the opening/closing damper 9' are the same as those described above.
The details are omitted as it is almost the same as the implementation.

Two blades 1 of the opening/closing damper 9' of this embodiment
0' and 10' are curved plates, and one end thereof is rotated around a shaft 12 by a hinge 11 as in the first embodiment. Both ends of the shaft 12 are fixed by levers 16, 16, and supported on both sides of the indoor unit main body 1 by an A-A shaft at the tip of the lever 16.

On the other hand, a bulge 17 is provided on the opposite side of the lever 16.
is formed, and the motor 18 is fixed to the bulge 17,
An oval cam 14' is attached to the shaft. As shown in FIG. 4, the cam 14' has an elliptical groove 19 formed on its inner periphery with a shape similar to the outer shape, and the blade 1
One end of the rod 20 is rotatably attached to the tip on the opposite shaft side of the rod 0', and the other end of the rod 20 is moved while being engaged with the groove 19.

In the second embodiment constructed as described above, when the air volume is high, the short axis of the cam 14' is aligned with the direction of the shaft 12' by the motor 18 in conjunction with the rotation speed of the Sirotskov fan 2, and the blade 10' is moved by the rod 20. Minimize the opening degree of the opening/closing damper 9' that pulls inward, and when the air volume is low, align the long axis of the cam 14' with the direction of the shaft 12, and push the blade 10' outward with the rod 20 to open the opening/closing damper 9'. The opening degree is maximized.

Furthermore, a third embodiment having an opening/closing damper 9'' shown in FIG. 5 will be described.Details of this embodiment as well other than the opening/closing damper 9'' will be omitted.

In this embodiment as well, two blades 10', 1
0' is in the shape of a curved plate, and one end thereof is rotated around a shaft 12 by a hinge 11, which is the same as in the second embodiment.

A compressible spring 13 is stretched between the opposite side of the hinge of the two blades 10', 10', a shape memory alloy spring 21 is stretched between the hinge 11 and the spring 13, and both ends of the shape memory alloy spring 21 are stretched. When the air volume is low, electric power is applied to heat it, and when the air volume is high, the contraction force of the spring 13 is greater than the expansion force of the shape memory alloy spring 21, so that the opening degree of the opening/closing damper 9'' is minimized, and when the air volume is low, the opening degree of the opening/closing damper 9'' is minimized. When the shape memory alloy spring 21 is heated, its stretching force is increased by the spring 13.
The opening degree of the opening/closing damper 9'' is maximized by setting the contraction force to be larger than the contraction force of .

The operations of the second and third embodiments described above are similar to those of the first embodiment. In addition,
In each of the embodiments described above, the Sirotskov fan 2 was used as the fan, but other types of fans may also be used.

Furthermore, in the above embodiments, the explanation has been given of the case where the effect is particularly high during heating, but the effect similar to that during heating can be achieved even during cooling.

(Effect of the invention) Since the invention is constructed as described above,
It has the following remarkable effects.

That is, when the air volume is high, the angle formed by the two blades 10, 10 that make up the opening/closing damper 9 is enlarged to ensure that the opening area of the outlet is sufficient to match the air volume, and for example, in the early stage of heating the room, the temperature distribution can be quickly uniformized. Also, during normal operation, low air volume is operated due to noise concerns, but when the air volume is low, the angle formed by the blades is made wider than when the air volume is high, and the opening area of the outlet is reduced, so that the blowing air speed remains almost the same as when the air volume is high. As a result, a sufficient blowing air velocity is ensured, and the temperature distribution in the room is made uniform to be almost the same as when the air volume is high.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an indoor unit of a first embodiment of a ceiling-suspended air conditioner which is a preferred embodiment of the present invention, Fig. 2 is an enlarged explanatory view of the opening/closing damper portion of Fig. 1, and Fig. The figure is an enlarged perspective view of the opening/closing damper part of the second embodiment, FIG. 4 is an explanatory diagram of FIG. 3, FIG. 5 is an explanatory diagram of the opening/closing damper part of the third embodiment, and FIGS. 6 and 7 are FIG. 2 is a vertical cross-sectional view of an indoor unit of a conventional ceiling-suspended air conditioner. 1...Indoor unit main body, 4...Front air outlet, 5...
Bottom air outlet, 9, 9', 9''...Opening/closing damper, 1
0,10'...Blade, 13...Spring, 14,1
4'...Cam, 21...Shape memory alloy spring.

Claims (1)

[Scope of utility model registration request] Front air outlet 4 that blows out conditioned air to the front and lower front of the indoor unit main body 1 that has a fan with variable air volume.
and a bottom air outlet 5 are provided, and an opening/closing damper 9 is provided on the upstream side of the front air outlet 4 and the lower air outlet 5.
2, which constitutes the opening/closing damper 9, so that the blowing wind speed becomes almost constant in conjunction with the level of the air volume.
A ceiling suspended air conditioner characterized in that the angle formed by the blades 10, 10 is reduced or enlarged.