JPS63140247A - Ceiling suspension type air conditioner - Google Patents

Abstract

PURPOSE:To constantly fix a blow-off air velocity in a blow-off direction and contrive a uniform room temperature distribution, by fixing blow-off port areas on the front side and on the lower side by turning an ON-OFF damper, and ensuring that the air quantity proportions of both blow-off ports can be relatively varied inversely proportionally. CONSTITUTION:A front blow-off port 4 and a lower blow-off port 5 are provided respectively on the front side and the lower front side of a main body 1 of a room unit 1, with a partition wall 6 therebetween, on the downstream of a room heat exchanger 3, the ports being substantially equal in aperture area. An ON-OFF damper 9 has a breadth approximately equal to that of the blow-off ports 4, 5, and is disposed on the upstream of the ports and on the downstream of the heat exchanger 3. The damper 9 comprises two circular wing shaped vanes 10, 10, which are projected upstream in cross-sectional shape and are hinged to a rotary shaft 12 at one end thereof. Both ends of the shaft 12 are fixed to levers 23, 24, and the lever 23 is turned with an axis A-A as a center by a motor 16. When the damper 9 is turned, the sum of the blow-off areas of the blow-off ports 4, 5 remains constant, and the air quantity proportions of the ports 4, 5 can be relatively varied inversely proportionally.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an improvement in a ceiling-suspended air conditioner, and particularly to one that achieves a uniform indoor temperature distribution during heating.

(Prior Art) Conventionally, this type of ceiling-suspended air conditioner has an indoor unit suspended from the ceiling, as shown in Fig. 14! Separately from the front air outlet 4 provided on the front surface of the indoor unit main body l, a lower air outlet 5 is provided at the front of the lower surface of the indoor unit main body l, and by opening the opening/closing damper 29 provided at the lower air outlet 5, heat can also be generated from the lower air outlet 5. It is known that a part of the air is blown downward, and the air is blown out forward from the front air outlet 4 in order to achieve a uniform temperature distribution in the room (see Japanese Utility Model Publication No. 58-39323). ).

Further, as shown in FIGS. 15 and 16, the damper 29' having its rotation center near the partition wall 6 that cuts through the front air outlet 4 and the lower air outlet 5 is switched to close the lower air outlet 5. The entire hot air is blown out from the front air outlet 4 (as shown by the solid line in Figure 15), or the front air outlet 4 is closed and the entire warm air is blown out from the lower air outlet 5 (as shown in the dotted line in Figure 15). The damper 29' is located in the middle of the front air outlet 4.
and the lower air outlet 5 to equalize the temperature distribution in the room (solid line in Figure 15).
Are known.

(Problem to be Solved by the Invention) However, the former conventional device shown in solid line in FIG. The outlet area is the sum of the front outlet 4 and the lower outlet 5, and the outlet area increases compared to the case where there is only the front outlet 4, and the outlet air speed decreases, so the hot air blown out from the indoor unit main body 1 increases. The reaching distance is short, and the warm air does not reach the living area 28, resulting in poor temperature distribution throughout the room.

In addition, the latter ones shown in Figs. 15 and 16 are for front suita (as shown by the solid line in Fig. 15) or downward blowout (as shown by the same dotted line).
When used alone, the wind speed is high and the hot air reaches a long distance, but it is difficult to make the temperature distribution uniform throughout the room, and
When the front blowout and the downward blowout are used with half the air volume each as shown in Fig. 16, the outlet area is twice that of the operating condition shown in Fig. 15, so the blowout air speed is halved and the temperature is increased. The distance that the air reaches is short, and although the hot air is blown both forward and downward, the warm air does not reach the entire room, and the temperature distribution in the room is not uniform.

(Means for Solving the Problems) Therefore, as a means for solving the problems, the present invention provides an indoor unit main body 1 of a ceiling-suspended air conditioner as illustrated in FIGS. 1 to 8. A front air outlet 4 and a lower air outlet 5 for blowing conditioned air forward and downward are provided in front of the heavy and lower surface, and an opening/closing damper 9 is provided upstream of the sub air outlets 1 and 5, and the rotation of the opening/closing damper 9 is provided. The sum of the areas of the sub-air outlets 4 and 5 does not change due to the movement, and the air volume ratio between the sub-air outlets 1 and 5 is relatively variable in inverse proportion.

(Function) The present invention uses the above-mentioned means to provide airflow at any position of the opening/closing damper 9, either all, only from the front side, only from the bottom side, or, for example, with an air volume ratio of 50% each for the front side and the bottom side. In either case, the blowing air velocity in the blowing direction is always constant, and the temperature distribution in the chamber is made uniform.

(Embodiment) Referring to FIGS. 1 to 6 below, preferred embodiments of the present invention will be described.
A ceiling-suspended air conditioner as an example will be described in detail.

Reference numeral 1 denotes an indoor unit main body that is hung with its rear side facing the corner of the ceiling of the room, and inside the indoor unit main body 1, a sirocco fan 2 and an indoor heat exchanger 3 are built in from the windward side, respectively, as shown in the figure. Although it is not equipped with a compressor, it is connected to the L'L outdoor unit with refrigerant piping, and the refrigerant discharged from the compressor is guided to the indoor heat exchanger 3, where it exchanges heat with the indoor air blown out by the sirocco fan 2, and cools the room. It is for heating.

Therefore, a front air outlet 4 is provided for the weight of the indoor unit main body I, and a lower air outlet L]5 is provided in front of the lower surface of the indoor heat exchanger 3 with a partition wall 6 in between. The holes are made with approximately equal area. Reference numerals 7 and 8 denote a front grill and a lower grill provided at the front air outlet 4 and the lower air outlet 5, respectively, and both grills are formed by a plurality of blades (three in the figure) so as to blow out the air to the front or the lower side. .

Reference numeral 9 denotes an opening/closing damper which is a feature of the present invention, and has a width approximately equal to that of the front air outlet 4 and the lower air outlet 5, and is located upstream of the sub air outlets 4 and 5 and is connected to the indoor heat exchanger 3. Installed on the downstream side.

As shown in detail in FIG. 6, the opening/closing damper 9 has two blades 10.10 each having a circular 92 shape with a convex shape on the windward side. One end of the blade 10.10 is a hinge 11.11, and a rotation shaft 12 is provided.
The ends of the rotating shaft 12 are fixed to levers 23 and 24 having A-A sleeves supported on both sides of the indoor unit main body l, and the lever 23 is further driven by the motor 16 via another lever. Rotates around the A-A axis.

That is, as shown by the dotted line arrow in FIG. 1, the lower surface air outlet 5 is closed and the entire amount of hot air is blown out from the front air outlet 4 to the front of the indoor unit body l, or as shown in FIG. 2, the front air outlet 4 is closed. The sub-air outlets 4 and 5 are located between the lower air outlet 5 and the
The amount of warm air can be blown forward and downward depending on the opening degree of I. It's something to rub.

To explain the operation in more detail, when the opening/closing damper 9 completely closes the lower air outlet 5 (the dotted line position in Figure 1), 100% of the air volume is blown forward from the front Suita opening 4, and then 75% of the air volume when the bottom air outlet 5 is closed by 75% and the front air outlet 4 is closed by 25%.
25% of the air volume is blown out from the front side and 25% from the bottom side, and when the opening/closing damper 9 closes half of both air outlets 4 and 5 equally (Fig. 2), 50% of the air volume is blown out from each air outlet/1.
and 5, and at the time when the opening/closing damper 9 closes 75% of the front air outlet 4 and 25% of the lower air outlet 5, 25% of the air volume is blown out from the front rfli, 75% is blown out from the bottom surface, and the opening/closing damper 9 At the time when the front air outlet 1 is completely closed (solid line position in Figure 1), the air volume is 1 from the lower air outlet 5.
00% will be blown downwards. Zunai Tsuchi, front air outlet 4
and the lower surface outlet 5 have approximately the same opening area, and the opening/closing tamper 9 has approximately the same spread as both outlets 4.5, so when the opening/closing damper 9 rotates, the air from both outlets 1 and 5 is The sum of the areas does not change, and the air volume ratio between the two air outlets 4 and 5 is relatively variable in inverse proportion as described above.

As shown in FIG.
Since the lEA wind is separated by the wing-shaped blades 10 when blowing out both forward and downward, there is little resistance to the flow of hot air and the Suita wind speed does not drop, so a sufficient reach of the hot air is ensured. This measures whether the temperature distribution in the room has improved.

As mentioned above, rather than blowing out the hot air horizontally forward from the front air outlet 4, if the warm air is blown out obliquely forward and downward as shown in Figures 3 to 5, the warm air is blown downward from the lower air outlet 5. Together, they help to further equalize the temperature distribution in the room.

For this reason, as shown in FIG. 3, the front grill 7 is tilted downward with the center of the front grill 7 as an axis, and 7
is configured to rotate up and down using the tip of a wing-shaped blade 25 as a rotation axis. (When used with both the front and lower blowouts in Figure 4, and 1 as in Figure 5)
When blowing out under heating with 100% airflow in the 1j direction, since the opening/closing damper 9 uses circular blade-shaped blades 10, the warm air flows out along the circular blades due to the Coanda effect.
A predetermined blowout angle can be obtained by a small change in the angle of the blades 25 of the front grille 7, and the effect is great.

The method for rotating the front grill 7 may be either manual or remote control using a motor, and in the above embodiment, the front grill 7 was explained in 1. However,
The lower grille 8 may also be formed in the same manner as the grille 7.

Next, in the second embodiment shown in FIG. 7, the structure 10 constituting the opening/closing tamper 9 in the first embodiment has a jF U shape or a circular wing shape convex to the windward side, whereas the blades are 10'
The only difference is that the shape is flat, the pond is the same as in the first embodiment, and its function is almost the same as in the first embodiment, so a description thereof will be omitted.

Therefore, during normal heating operation, the ratio of the airflow rate is 7 degrees from the front air outlet 4 and 3 degrees from the bottom air outlet 5 for the heating effect and draft prevention, but when the heating starts up, the air volume is not immediately warm. Problems remain. For this reason, in the third embodiment, when heating starts up, especially when operating by the so-called obayo timer, the opening/closing damper 9 is rotated as shown by the solid line in FIG. 1 to close the front air outlet 4 and open the lower air outlet. Blow out the entire air volume from 5,
In conjunction with this, the air volume of the fan 2 is increased to a high air volume. In this way, when the heating is turned on, there is no need to consider drafts to the human body, and the heating is immediately turned off. In addition, if the temperature in the room rises and the thermostat is activated, the air volume of the Sirocco fan 2 will be restored to the original state.
The opening/closing tamper 9 is rotated so that the ratio of the blowout air volume becomes 1171, the ratio of the blowout 7 and the bottom blowout 3.

Next, in the first embodiment, the opening/closing damper 9 is not fixed for a certain period of time as in the first embodiment, but is periodically swung downward by 1 to switch the air outlets 1 and 5 from fully open to fully closed. The opening degree is varied in opposite directions, and the Suita mode of 100% front air blowing and 100% lower air blowing is repeatedly formed by periodically swinging the opening/closing tamper 9 up and down.

By doing this, the front air outlet 1 will open as shown in Figure 8.
A front air outlet area 26 formed diagonally downward from the front surface and a lower surface Suita outlet 5. Since hot air is not directly blown into the living area 28 located between the lower surface blowing area 27 formed directly below the front blowing area 26 and the lower blowing area 27, drafts can be avoided. The air volume changes from time to time in accordance with the periodic up and down swings of the opening/closing damper 9, and both air outlets 4
Since the sum of the opening areas of
The opening/closing damper 9 is not shown in FIGS. 9 to 13.
A fifth embodiment will be described in which the opening degree of the blades 10, 10 (flat blades 10', 10') is changed.

In this embodiment, the sirocco fan 2 has a variable rotation speed and a variable air volume. The opening/closing damper 9 has blades 10' as shown in FIG.

A compressible spring 13 is stretched between one longitudinal end of 10', and an oval cam 1 is disposed between the other end, and the cam 14 is driven electrically or manually. When coincides with the direction of the hinge It, the contractile force of the spring 13 minimizes the opening of the two blades 10', 10', and when the short axes coincide, the contractile force of )<13 is overcome. Feather 10',
10' is pushed outward to maximize the opening degree.

As shown in FIG. 1, 15 is a control device that includes a seven-point fan 2 and an oval cam 1, and controls the rotational speed of the sirocco fan 2 in three stages, for example, maximum, intermediate, and minimum. At the same time, the rotation of the oval cam 14 is linked with the switching of the rotational speed of the sirocco fan 2, so that the maximum air volume (■
1), when the middle (M) and the lowest (L), the blade 10.1
The opening degrees of 0 are inversely linked so that they become minimum, intermediate and maximum, respectively.

In the early stage of heating, the control device 15 maximizes the rotation speed of the sirocco fan 2 to create a high wind m (I-1), and in conjunction with this, the long sleeve of the oval cam 14 is activated as shown by the solid line in Figure 1O. If the opening degree of the two blades 10', 10' of the opening/closing damper 9 is minimized in accordance with the direction of the hinge 11, the opening area of the outlet is wide commensurate with the high air volume, and a sufficient wind speed is ensured (No. 9). As shown by the solid line arrow in the figure, the warm air reaches the corners of the room from the front air outlet 4 and the lower air outlet 5, resulting in a good temperature distribution and a good heating start-up.

When the temperature of the room rises, a low ff1fl is used due to noise concerns. At this time, the control device 15 is linked to the minimum rotational speed of the 70mm fan 2, and the oval cam 14 is activated as shown by the dotted line in Figure 10. Its short axis is made to coincide with the direction of the hinge 11, and its opening degree is expanded to the maximum by resisting the contractile force of the two wings P: i10' and 10'. Then, the opening areas of the front air outlet 4 and the lower air outlet I 5 are increased by increasing the opening degree of the opening/closing damper 9! ft r: is sandwiched in proportion to the decrease of 1, the blowing wind speed becomes almost equal to the wind speed when n is high (dotted line arrow in Figure 9), and the temperature distribution in the room is as good as when the air volume is high. It's Otsu's.

Next, the two blades 10, 10 of the opening/closing damper 9' shown in FIGS. rotate around. Both ends of the rotation shaft 12 are provided with levers 23' and 24'.
and supported on both sides of the indoor unit main body 1 by the A-A shaft at the tip of the lever 24'.

On the other hand, a bulge 17 is formed on the side opposite to the tip of the lever 24', a motor 18 is fixed to the bulge 17, and an elliptical cam 14' is attached to the shaft thereof. As shown in FIG. 12, the cam 14' has an elliptical groove 19 with a similar shape to the outer circumference formed on its inner periphery, and a rod 20 on the opposite end of the blade 10.
Rotatably attach one end of the rod 20, and attach the other end of the rod 20! i4
1) Because I don't engage in it (I'm hyperactive).

With this structure, the short axis of the cam 1' is aligned with the rotation axis 12 direction by the motor 18 in conjunction with the rotational speed of the 70mm fan 2, and the rod 20 moves the blade 10 in the direction of the rotating shaft 12 when the wind is high. Minimize the opening of the retractable opening/closing damper 9' to reduce wind!
1, the long sleeve of the cam 1' is aligned with the direction of the rotating shaft 12, and the rod 20 is used to push the blades 10 outward to open the opening/closing damper 9' [y is at its maximum].

Furthermore, the 2+fi blades 10.10 of the opening/closing damper 9'' shown in FIG.

A contraction spring 13 is placed between the two blades 10 and 10 on the opposite side of the hinge.
A shape memory alloy spring 21 is stretched between the hinge 11 and the spring I3, and electric power is applied to both ends of the shape memory alloy spring 21 to heat it when the air volume is low, and when the air volume is high, the spring 13 is larger than the stretching force of the shape memory alloy spring 21, the opening degree of the opening/closing damper 9'' is minimized, and when the air volume is low, the stretching force of the cedar-shaped memory alloy spring 2t is made larger than the contraction force of the spring 13 by heating the cedar-shaped memory alloy spring 2t. This is to maximize the opening degree of the opening/closing damper 9''.

The above-mentioned operation of B in FIGS. 11 and 13 is the same as that in FIG. 1O. Although Sirocco Fan 2 was used as the fan in each of the prefertilization examples, it would be better to use a pond-type fan. Further, in the above embodiments, the explanation was given for the case where the effect is particularly high during heating, but it is also possible to achieve an effect similar to that obtained when using a 11u room even during cooling.

(Effects of the Invention) Since the present invention is constructed as described above, it has the following remarkable effects.

In other words, at any position of the opening/closing damper 9, the air flow from the front air outlet 4 and the lower air outlet 5 changes. Since the ratio is relatively variable in inverse proportion, even if only the front air outlet, only the bottom air outlet, or, for example, the front air outlet and the lower face outlet are each 50% and the air volume ratio is 1, The blowing air velocity in the blowing direction is always constant, and the temperature distribution in the chamber is uniform.

In addition, when the opening/closing damper 9 is made into a circular blade with a cross-sectional shape of the blade 10 convex to the windward side as in the embodiment section, especially when the downward blowing of heating is performed at 100% of the forward Suita, the Coanda As a result of this effect, the hot air flows along the grooves, so by changing the small !'Q,'Q: of the front grille 7, a predetermined blowout angle can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-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, and FIGS.
The figure is an explanatory diagram of the blowing air depending on the position of the opening/closing damper in Figure 1,
Figures 4 and 5 are explanatory diagrams of the blowing air due to the deformation of the front grille, Figure 6 is an enlarged perspective view of the opening/closing damper section, and Figure 7 is the interior of the second embodiment in which the blades of the opening/closing damper are shaped like a flat plate. A longitudinal cross-sectional view of the machine, Fig. 8 is an explanatory diagram of the blowout air of the first embodiment, Figs. 9 to 13 show the fifth embodiment in which the opening/closing damper periodically swings, and Fig. 9 is an explanatory diagram of the blowout of the first embodiment. Illustration of wind, 1st O
The figure is an enlarged perspective view of the opening/closing damper section shown in FIG. 9, FIG. 11 is an enlarged perspective view of another type of opening/closing damper section, and FIG.
Figures 1 and 3 are explanatory diagrams of other types of opening/closing dampers, and Figures 14 to 16 are vertical sectional views of a conventional ceiling-suspended air conditioner (c) indoor unit. ■ ... Indoor unit main body 4 ... Former city air outlet 5 ... Bottom air outlet 9.9', 9'' ... Opening/closing damper 10.10' ... Vane applicant Daikin Industrial Co., Ltd.?Toy0,1 Ka, A. Pii4- + A□
55, 5 and b＼8 Bottom grill 8 Bottom grill Figure 5 Figure 9 Opening/closing damper Figure 4 1) 11 The air outlet 4 1 Indoor unit main body 91 I411 Damper Figure 9 11C; Main unit 1 Indoor unit main unit Figure 15

Claims (1)

[Claims] 1. A front air outlet (4) and a lower air outlet (5) that blow out conditioned air forward and downward to the front and lower sides of the indoor unit main body (1), and both air outlets (4). An opening/closing damper (9) is provided on the upstream side of the opening/closing damper (9). A ceiling-suspended air conditioner characterized in that the air volume ratio between the air outlets (4) and (5) is relatively variable in inverse proportion. 2. The ceiling-suspended air conditioner according to claim 1, wherein the blade (10) constituting the opening/closing damper (9) has a cross-sectional shape of a circular wing convex toward the windward side. Machine.