JPH05106856A - Ceiling embedded air conditioner - Google Patents

Abstract

(57) [Abstract] [Purpose] To be able to control the flow rate of the air flow that bypasses the heat exchanger with an extremely simple configuration. [Structure] A fan 4 and a heat exchanger 5 located on the outlet side of the fan 4 are arranged in a casing 1 having an air inlet 2 and an air outlet 3 on its lower surface.
In a ceiling-embedded air conditioner having a bypass passage 13 through which a part of the air flow blown out of the bypass passes above the heat exchanger 5, the communication part 15 and the bypass passage 13 that open the bypass passage 13 are provided. Non-communication part 1 that closes
A movable disk 14 having 6 and a rotary drive means 17 for rotating the movable disk 14 at a desired rotation angle are attached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-embedded air conditioner, and more particularly to a ceiling-embedded air conditioner for preventing blown air flow (that is, warm air) from rising during heating operation. It's about the machine.

[0002]

2. Description of the Related Art Generally, in the case of a ceiling-embedded air conditioner,
Since it is installed at a high place (i.e., ceiling) away from the floor, the air flow (i.e., warm air) blown up during heating operation (especially during medium or weak operation) rises before reaching the floor surface. Therefore, temperature unevenness is generated in the upper and lower parts of the room, and a problem that the heating effect in the vicinity of the floor, which is the essential living space, does not increase easily occurs.

Therefore, in order to deal with the above-mentioned inconvenience, in the case where the heat exchanger is arranged on the blowout side of the fan, a part of the airflow blown from the fan bypasses the heat exchanger and is guided to the air blowout port. It has been proposed that a bypass passage is provided to prevent the warm air from passing through the heat exchanger from rising due to an air flow of about room temperature passing through the bypass passage (for example, Japanese Utility Model Laid-Open No. 60-187823). reference).

However, in the case of the above-mentioned known example, since the bypass passage is always open, the bypass can be used even when warm air reaches the floor surface without doing anything, as in the case of strong heating operation. An airflow of about room temperature is to be blown out through the passage. Therefore, not only is the fan power wasted wastefully, but there is also a problem in terms of operating noise. In the case of the above-mentioned known example,
Since a partition plate for partitioning the hot air passage through the heat exchanger and the bypass passage is attached, the structure becomes complicated and the width of the air conditioner becomes large and the weight becomes heavy. There are also defects.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is possible to control the flow rate of an air flow that bypasses a heat exchanger with an extremely simple structure. The purpose is to

[0006]

In the invention of claim 1, as a means for solving the above-mentioned problems, as shown in the drawings, in a casing 1 having an air inlet 2 and an air outlet 3 on its lower surface, A bypass passage in which a fan 4 and a heat exchanger 5 located on the blow-out side of the fan 4 are arranged, and a part of the air flow blown out from the fan 4 passes above the heat exchanger 5 to bypass. In a ceiling-embedded air conditioner including 13, a communication part 1 for opening the bypass passage 13
5 is provided with a movable disk 14 having a non-communication portion 16 for closing the bypass passage 13 and a rotary drive means 17 for rotating the movable disk 14 at a desired rotation angle.

In the invention of claim 2, as means for solving the above-mentioned problems, as shown in the drawings, in the ceiling-embedded air conditioner of claim 1, a pulse motor is used as the rotation driving means 17. I am using.

[0008]

According to the invention of claim 1 or 2, the following actions can be obtained by the above means.

That is, when the movable disk 14 is rotated by a predetermined rotation angle by the pulse motor which is the rotation driving means 17, the bypass passage 13 is opened, semi-opened, closed, or opened and closed repeatedly. From the point of view, for example, when the fan 4 is in the “weak” operation state, the bypass airflow can be blown by opening the bypass passage 13, and when the fan 4 is in the “medium” operation state, the bypass air flow can be bypassed. By making the passage 13 half-open, the flow rate of the bypass air flow is halved, and when the fan 4 is in the “strong” operation state, the bypass passage 13 is closed to stop blowing the bypass air flow. At the same time, by slowly rotating the movable disk 14, the opening and closing of the bypass passage 13 is repeated, so that the bypass air flow is generated. So that the blown out in the open state.

[0010]

According to the invention of claim 1, in the casing 1 having the air inlet 2 and the air outlet 3 on the lower surface,
A bypass passage in which a fan 4 and a heat exchanger 5 located on the blow-out side of the fan 4 are arranged, and a part of the air flow blown out from the fan 4 passes above the heat exchanger 5 to bypass. In a ceiling-embedded air conditioner provided with a movable disk 14 having a communication part 15 that opens the bypass passage 13 and a non-communication part 16 that closes the bypass passage 13.
And a rotary drive means 17 for rotating the movable disk 14 at a desired rotation angle and rotating the movable disk 14 by a predetermined rotation angle, whereby the bypass passage 13 is opened, semi-opened, closed, or Since the opening and closing can be repeated, for example, when the fan 4 is “weakly” operated during the heating operation, the bypass passage 13 can be opened to blow the bypass air flow. As a result, the warm air is prevented from rising, and when the fan 4 is operating in the “medium” state, the bypass passage 13 is opened halfway to halve the flow rate of the bypass air flow, which also prevents the warm air from rising. Was
When the fan 4 is operating “strongly”, the bypass passage 1
By making 3 closed, the blowing out of the bypass air flow is stopped and the fan power is not wasted, and
There is an excellent effect that the driving noise is also reduced.

Further, according to the first aspect of the present invention, the bypass passage 13 is provided by slowly rotating the movable disk 14.
Since it can be opened and closed repeatedly, the bypass air flow is blown out intermittently, and it is possible to add temperature change and wind speed change that stimulates the blown air flow. There is also.

Further, according to the invention of claim 1, by rotating the movable disk 14, the bypass passage 13 is formed.
Since it is configured to control the flow rate of the air flow flowing through, the structure is extremely simplified, and there is an excellent effect that it is suitable for an air conditioner having a plurality of air outlets 3.

Further, even when the movable disk 14 is rotated, the total air volume of the hot air and the cold air does not change so much, so that the change in the fan rotation speed is small and the operation sound does not change. There is also.

According to the second aspect of the present invention, in the ceiling-embedded air conditioner according to the first aspect, since the pulse motor is used as the rotary drive means 17 for rotationally driving the movable disk 14, the movable disk 14 is used. It has an excellent effect that the rotational positioning and the rotational speed adjustment can be extremely easily performed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1 FIGS. 1 and 2 show a ceiling-embedded air conditioner according to Embodiment 1 of the present invention. The present embodiment corresponds to the inventions of claims 1 and 2.

The ceiling-embedded air conditioner of this embodiment has a rectangular parallelepiped casing 1 having an air inlet 2 at the center of the lower surface and four air outlets 3, 3, 3, 3 at the outer peripheral portion of the lower surface. The casing 1 is provided with a turbofan 4 arranged at a position facing the air suction port 2, and a cylindrical heat exchanger 5 arranged on the blowout side of the turbofan 4.

A partition plate 7 fixed to the lower end of a cylindrical member 6 fixed at a position corresponding to the upper surface of the heat exchanger 5 on the top plate 1a of the casing 1 abuts on the upper surface of the heat exchanger 5. The inside of the casing 1 is surrounded by the inner peripheral surface of the heat exchanger 5 and the partition plate 7, and the primary chamber 8 surrounded by the outer peripheral surface of the heat exchanger 5 and the casing 1. It is divided into the next chamber 9. A fan motor 10 that is a drive source of the turbofan 4 is fixed to the partition plate 7.

A plurality of cylindrical members 6 are arranged at equal intervals in the circumferential direction.
.. (6 in the case of this embodiment) are formed in the outer peripheral portion of the partition plate 7 close to the inner peripheral surface of the heat exchanger 5, and the window holes 11, 11 ,. Are formed with window holes 12, 12 ... That is, in the case of the present embodiment, the passages including the window holes 11 and 12 respectively include the bypass passages 13 in which a part of the blown air flow of the turbofan 4 bypasses the heat exchanger 5 and flows to the secondary chamber 9. It is supposed to be configured. In the present embodiment, the circumferential dimension of the window holes 11 and 12 is made equal to the interval between the adjacent window holes 11, 11 and 12, 12.

However, in the space formed between the partition plate 7 and the casing top plate 1a, the window holes 11, 11 ,.
.And 12,12 .. (In other words, bypass passage 1
3) for opening the communication part 15, 15 ... And the window hole 1
1, 11, ... And 12, 12, ... (In other words, a movable disk 14 having a non-communication portion 16, 16, .. Pulse motor 17 acting as rotation driving means
And are provided. The pulse motor 17 is fixed to the casing top plate 1a.

In the case of the present embodiment, the movable disc 14 has a disc portion 14a facing the partition plate 7, and the cylindrical member 6.
.., and the communication portions 15, 15 ... Are constituted by cutout holes formed from the cylindrical portion 14b to the disk portion 14a.

In the drawings, reference numeral 18 is a drain pan, 19 is an opening formed in the ceiling C, and 20 is a support for suspending and supporting the air conditioner.

The ceiling-embedded air conditioner configured as described above is operated in the following various operation modes.

(I) During heating operation in which the turbo fan 4 is "weakly" operated The pulse motor 17 is rotationally driven by a predetermined rotation angle,
As shown in FIG. 3 (a), the communicating portions 15, 15 ... In the movable disk 14 are the window holes 11, 11.
The movable disk 14 is positioned at a position that coincides with, and the bypass passages 13, 13 ... Are opened.

Then, most of the air flow W blown out from the turbo fan 4 is heated when passing through the heat exchanger 5 and becomes warm air w ₁ which flows into the secondary chamber 9. W
, Flows through the bypass passages 13, 13, ... To the secondary chamber 9 with the cold air w ₂ at about room temperature.

Therefore, the warm air w ₁ is prevented from being lifted up by the cold air w ₂ blown out from behind, and the temperature unevenness in the upper and lower parts of the room is effectively improved.

(II) During the heating operation in which the turbofan 4 is operated "strongly" Since the wind speed and the air volume of the blown air are large, the warm air reaches the floor surface without preventing it from rising.
The pulse motor 17 is driven to rotate by a predetermined rotation angle,
As shown in (b) of FIG. 3, the non-communication portions 16, 16 ... In the movable disk 14 are the window holes 11, 11 ,.
The movable disk 14 is positioned at a position that coincides with, and the bypass passages 13, 13 ... Are closed.

Then, the entire amount of the air flow W blown out from the turbo fan 4 passes through the heat exchanger 5,
No blowout of cold air from the bypass passages 13, 13 ...

Therefore, only the hot air is blown from the air outlets 3, 3, 3, 3, but the hot air has a high wind speed and a large air volume due to the "strong" operation of the turbofan 4. Therefore, the warm air does not float up unlike the “weak” operation. That is, it is not necessary to waste the fan power, and it is possible to avoid an increase in driving noise.

(III) Not so much during heating when the turbofan 4 is operating "medium" or when the ceiling is high and during heating when the turbofan 4 is operating "strong""weak". However, since a slight rise of warm air occurs, the pulse motor 17 is rotationally driven by a predetermined rotation angle, and as shown in (c) of FIG.
The non-communication portions 16, 16 ... of the movable disk 14 are the window holes 1
The movable disk 14 is positioned at a position to close half of 11, 11, ... And 12, 12 ,.
3 ... is half opened.

Then, most of the air flow W blown out from the turbofan 4 is heated when passing through the heat exchanger 5 and becomes warm air w ₁ which flows into the secondary chamber 9. W
Part (in this case, a very small amount) of the bypass passage 13,1
It flows to the secondary chamber 9 through 3 ... with the cold air w ₂ at room temperature.

Therefore, the warm air w ₁ is prevented from being lifted up by the small amount of cold air w ₂ blown out from behind, and the temperature unevenness above and below the room is effectively improved.

In this case, if the position of the movable disk 14 is properly selected, the window holes 11, 11, ... And 12, 12 ,.
・ The opening can be set appropriately.

(IV) During heating operation in which the blown air temperature or the blown air velocity changes, as shown in FIG. 3D, when the movable disk 14 is rotated at a slow speed by driving the turbofan 4, The window holes 11, 11, ... And 12, 12 ... Are repeatedly opened or closed depending on the correspondence with the communicating portions 15, 15 ... Or the non-communicating portions 16, 16 .. Then, the bypass passages 13, 13 ... Are repeatedly opened or closed.

Therefore, from the air outlets 3,3,3,3,
.. and cold air that pass through the bypass passages 13, 13 ... Are alternately blown out, and the blown air temperature and the blown air velocity change intermittently. As a result, heating that gives a sensation to the user can be performed.

(V) During normal cooling operation In this case, since it is not necessary to consider the arrival of the blown air flow on the floor surface, the non-communication portions 16, 16 ... Are window holes 11, 11, ...
A mode for blocking 12 ... [See FIG. 3 (A)] is selected.

(VI) During cooling operation in which the blown air temperature or the blown air velocity changes, as shown in FIG. 3D, when the movable disk 14 is rotated at a slow speed by driving the turbofan 4, The window holes 11, 11, ... And 12, 12 ... Are repeatedly opened or closed depending on the correspondence with the communicating portions 15, 15 ... Or the non-communicating portions 16, 16 .. Then, the bypass passages 13, 13 ... Are repeatedly opened or closed.

Therefore, from the air outlets 3, 3, 3, 3.
The hot air that flows through the bypass passages 13, 13 ... And the hot air that does not include the hot air are blown out alternately, and the blown air temperature and the blown air wind speed change intermittently. As a result, cooling that gives a sensation to the user can be performed.

As described above, according to the present embodiment, by opening and closing the bypass passages 13, 13, ..., It is possible to prevent the warm air from rising and to avoid wasteful use of fan power and reduce operating noise. ..

Further, since the flow rate of the air flow flowing through the bypass passages 13, 13 ... Is controlled by rotating the movable disk 14, the structure is extremely simplified and four Air outlet 3,3,3,
There is also an excellent effect that it becomes suitable for an air conditioner having 3.

Moreover, even when the movable disk 14 is rotated, the total air volume of the hot air and the cold air does not change so much, the change in the fan rotation speed is small, and the operating noise does not change.

Second Embodiment FIGS. 4 and 5 show a ceiling-embedded air conditioner according to a second embodiment of the present invention. The present embodiment corresponds to the inventions of claims 1 and 2.

In the case of this embodiment, the pulse motor 17 is fixed to the partition plate 7, and the disk portion 1 of the movable disk 14 is fixed.
A circular convex portion 14b for accommodating the pulse motor 17 is formed at the center of 4a.

The other structure, function and effect are similar to those of the first embodiment, and the explanation thereof is omitted.

Embodiment 3 FIGS. 6 and 7 show a ceiling-embedded air conditioner according to Embodiment 3 of the present invention. The present embodiment corresponds to the inventions of claims 1 and 2.

In the case of this embodiment, the movable disk 14 comprises a disk portion 14a and a circular convex portion 1 formed at the center of the disk portion 14a.
4c, and the communication portions 15, 15 ... Are constituted by openings formed in the outer peripheral edge of the disk portion 14a of the movable disk 14.

The other structure, function and effect are the same as those of the first embodiment, and the description thereof will be omitted.

Embodiment 4 FIG. 8 shows a ceiling-embedded air conditioner according to Embodiment 4 of the present invention. The present embodiment provides claims 1 and 2.
It corresponds to the invention of.

In the case of this embodiment, a centrifugal fan comprising a scroll 21 having an upward discharge port 21a and a rotor 22 rotatably arranged in the scroll 21 is used as the fan 4.

The other structure, functions and effects are the same as those of the first embodiment, and the explanation thereof will be omitted.

The invention of the present application is not limited to the configuration of each of the above-described embodiments, and it goes without saying that the design can be changed as appropriate without departing from the gist of the invention.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a ceiling-embedded air conditioner according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an explanatory diagram showing the position of the movable disk in operation modes (I) to (VI) in the ceiling-embedded air conditioner according to the first embodiment of the present invention.

FIG. 4 is a vertical sectional view of a ceiling-embedded air conditioner according to a second embodiment of the present invention.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a vertical sectional view of a ceiling-embedded air conditioner according to a third embodiment of the present invention.

7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a vertical sectional view of a ceiling-embedded air conditioner according to a fourth embodiment of the present invention.

[Explanation of symbols]

1 is a casing, 2 is an air inlet, 3 is an air outlet, 4
Is a fan, 5 is a heat exchanger, 13 is a bypass passage, 14 is a movable disk, 15 is a communicating portion, 16 is a non-communicating portion, and 17 is a rotation driving means (pulse motor).

Claims (2)

[Claims] 1. An air inlet (2) and an air outlet on the lower surface
A fan (4) and a heat exchanger (5) located on the outlet side of the fan (4) are arranged in a casing (1) having (3), and the blowout from the fan (4) is performed. Bypass passage (1) through which a part of the air flow is bypassed by passing over the heat exchanger (5).
3) A ceiling-embedded air conditioner including a movable disk having a communication part (15) for opening the bypass passage (13) and a non-communication part (16) for closing the bypass passage (13).
(14) and a rotary drive means (17) for rotating the movable disk (14) at a desired rotation angle. 2. The ceiling-embedded air conditioner according to claim 1, wherein the rotation driving means (17) is a pulse motor.