JPH0356815Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention mainly relates to an indoor unit used for a ceiling meter and a ceiling-embedded air conditioner.

(Conventional technology) As an indoor unit of a conventional ceiling-mounted air conditioner,
The indoor unit described in Japanese Patent Application Laid-open No. 61-31828 is known, and the indoor unit described in this publication is the fourth
As shown in the figure, an air outlet 3 is formed in one side of the main body casing 1, and an air suction inlet 2 is formed in the lower part thereof, and a fan 4 and a heat exchanger 5 are provided inside the casing 1 facing each other. provided in the form of
Indoor air sucked in from the suction port 2 as the fan 4 is driven to rotate is supplied to the heat exchanger 5, and the air heat-exchanged when passing through the heat exchanger 5 is transferred to the indoor side from the blow-off port 3. It is designed to blow out horizontally.

(Problem to be solved by the invention) By the way, when performing heating operation with the above air conditioner, the air outlet 3 of the main body casing 1
Since the air blown out from the room has a high temperature, it has a low specific gravity and tends to accumulate on the ceiling, making it difficult to reach the floor, resulting in uneven indoor temperature distribution and poor heating efficiency. There was a problem.

The present invention was devised in view of the above problems, and its purpose is to bypass the heat exchanger without supplying a part of the air blown from the fan during heating operation to the heat exchanger. By blowing this bypassed low-temperature air onto the high-temperature air that has passed through the heat exchanger, the specific gravity of the air blown out from the outlet toward the indoor side is increased. By blowing a bypass flow onto the air that has passed through the heat exchanger and deflecting the air flow blown out from the outlet port downward, the blown air can reach the floor surface and the indoor temperature distribution can be made uniform. The object of the present invention is to provide an indoor unit that can improve heating efficiency.

In addition, in the conventional indoor unit mentioned above,
A bypass passage T similar to the air flow passage of the present invention, which will be described in detail later, is formed inside the main body casing 1, and the bypass passage T is equipped with a damper D that can be freely opened and closed. When the temperature of the air blown out from the air outlet 3 is high during heating operation of the air conditioner, the damper D is configured to cause low temperature indoor air to be blown out from the air outlet 3 by opening the damper D. This device is designed to adjust the temperature of the blown air by attracting air, and its purpose is completely different from that of the present invention.

(Means for Solving the Problems) The indoor unit of the present invention is configured as shown in the drawings, and includes a heat exchanger 5, a fan 4 that sends air to the heat exchanger 5, and a fan 4 that supplies air to the heat exchanger 5. In an indoor unit of an air conditioner, the heat exchanger 5 is bypassed and the air conditioner is provided between the outlet of the fan 4 and the air outlet 3 for blowing out air that has been heat exchanged. It is characterized in that an air flow path 6 is formed to deflect the air flow from the outlet 3 downward, and an opening/closing means 7 for opening and closing the air flow path 6 is provided in the air flow path 6.

(Function) During heating operation of the air conditioner, by opening the air passage 6 with the opening/closing means 7, a part of the air blown from the fan 4 passes through the air passage 6, The airflow that is blown into the air that has passed through the heat exchanger 5 and is blown out from the outlet 3 toward the indoor side is deflected downward,
Moreover, although the air that has passed through the heat exchanger 5 has a high temperature and low specific gravity, this air is blown with low-temperature air that has bypassed the heat exchanger 5 and passed through the air flow path 6. Therefore, the specific gravity of the air blown from the outlet 3 toward the indoor side becomes large, and therefore the air blown from the outlet 3 can reach the floor surface, resulting in a uniform indoor temperature distribution. This allows efficient heating operation.

(Example) An indoor unit of an air conditioner according to the present invention will be described below with reference to an example shown in the drawings.

Figure 1 shows an indoor unit of a ceiling-mounted air conditioner.
An air suction port 2 opening toward the indoor side is formed, a suction grill 21 is attached to the suction port 2, and air blow-off ports 3 are formed at both outer sides of the suction port 2 on the bottom surface of the casing 1. There is.

Further, an air blowing fan 4 having two blowing portions 41 is disposed inside the center of the casing 1 facing the suction port 2, and at a position opposite to each of the blowing portions 41 of the fan 4, A heat exchanger 5 is provided in each.

However, in the above indoor unit,
Each of the heat exchangers 5 is provided between the air outlet of each of the blow-off portions 41 in the fan 4 and each of the blow-off ports 3.
In addition, each air passage 6 is provided with an opening/closing means 7 for opening and closing the air passage 6.

Specifically, the blowing portion 41 in the fan 4
from the side part in the air blowing direction of the casing 1
An L-shaped partition plate 8 extending close to the air outlet 3 is provided along the upper wall 11 and the side wall 12, and the air flow path 6 is provided between the partition plate 8 and each of the walls 11 and 12. The opening/closing means 7 is provided at the lower end of the partition plate 8 on the air outlet side of the air passage 6.

As shown in detail in FIG. 2, the opening/closing means 7 includes a shutter 72 supported in the air flow path 6 via a shaft rod 71 so as to be freely openable and closable, and the shutter 7.
A first arm 75 is connected to a motor shaft 74 of this motor 73, and a connecting rod 76 is connected to the first arm 75.
The second arm 77 is connected to a third arm 78 connected to the shaft rod 71 of the shutter 72, and as the motor 73 rotates, each of the arms 7
5, 77, 78, the connecting rod 76, and the shaft 71 to open and close the shutter 72.

Thus, during heating operation of the air conditioner, the motor 73 is driven to rotate, and the shutter 72 closes the air flow path 6, as shown by the solid line in FIG.
By opening the fan 4, most of the air blown out from the fan 4 is heated by the heat exchanger 5 and blown out diagonally downward as shown by arrow a in the figure. , a part of the air blown from the fan 4 bypasses the heat exchanger 5 and is blown downward from the air flow path 6 as shown by arrow b, so that the air flow The airflow that has passed through the heat exchanger 5 is deflected downward by the bypass airflow that heads downward through the passage 6, and the airflow that is blown out from the air outlet 3 toward the indoor side is indicated by arrow c. The air is blown out almost directly downward.

When controlling the airflow blown out from the air outlet 3 by the shutter 72, approximately 90% of the air blown out from the fan 4 is supplied to the heat exchanger 5, and the remaining 10% is supplied to the airflow. In this way, the air is supplied to the air passage 6 without lowering the temperature of the air blown into the room from the air outlet 3, that is, without giving the occupants a cold draft feeling. Air is blown out from the outlet 3 toward the floor below, making it possible to equalize the temperature distribution in the room.

Although the air that has passed through the heat exchanger 5 has a high temperature and a low specific gravity, this air is mixed with low-temperature, high-specific gravity air that has bypassed the heat exchanger 5. The specific gravity of the air blown out from the outlet 3 is increased, and this, together with the fact that the air is deflected downward by the shutter 72, directs the air from the outlet 3 toward the floor below. This allows air to be blown out, making it possible to even out the temperature distribution in the room and provide efficient heating.

In addition, when performing the heating operation as described above, if the temperature of the heat exchanger 5 is low, such as when the air conditioner starts up or stops operating, the shutter 72 may be opened to prevent cold draft. It is preferable to keep it in a closed state. Moreover, the opening/closing control of the shutter 72 is performed in conjunction with a thermostat attached to the heat exchanger 5 and detecting the temperature of the heat exchanger 5, and when the thermostat reaches, for example, 55°C. When the temperature rises, the shutter 72 is opened, and when the temperature reaches 50° C., the shutter 72 is closed. By opening and closing the shutter 72 in a temperature-controlled manner, it is possible to provide even more comfortable heating without giving the occupants the feeling of a cold draft.

In addition, when the air flow path 6 is closed by the shutter 72 during the heating operation of the air conditioner, as shown by the imaginary line in FIG.
The entire amount of air blown out is heat-exchanged by the heat exchanger 5 and blown into the room from the outlet 3.

Further, the shutter 72 is connected to the motor 7 mentioned above.
In addition to 3, it may be operated by a magnet or a bimetal, for example.

By the way, in the above embodiment, a ceiling-embedded air conditioner has been described, but the present invention can also be applied to a ceiling-suspended type.

That is, as shown in FIG. 3, a fan 4 and a heat exchanger 5 are placed facing each other inside a main body casing 1 which has an air inlet 2 on the lower surface of one side and an air outlet 3 on the other side. In the ceiling-mounted air conditioner provided, the heat exchanger 5 is installed inside the casing 1.
A partition plate 8 extending from the top of the air outlet 3 to near the air outlet 3 is provided, and the partition plate 8 allows the heat exchanger 5 to
forming an air flow path 6 from the air outlet of the fan 4 to near the air outlet 3, bypassing the
An opening/closing means 7 for opening and closing the air passage 6 may be provided at the tip of the air passage 6.

In this case, as well as in the embodiment described above, by opening the air flow path 6 with the opening/closing means 7 during heating operation, the air blown out from the outlet 3 toward the indoor side is The air flow from the air flow path 6 is biased downward, and the air flow from the air flow path 6 increases the specific gravity of the air blown from the air outlet 3, so that the air flows from the air outlet 3 to the floor. Air is blown out towards the surface, which equalizes the temperature distribution in the room and provides efficient heating.

In the case of the ceiling-mounted air conditioner, the air flow path 6 is formed on both side walls of the casing 1,
Guiding the air passing through this air flow path 6 downward,
The air blown out from the discharge port 3 can also be deflected downward by this guide air.

As shown in each of the above embodiments, when the air flow path 6 is formed inside the main body casing 1 by the partition plate 8, the air flow path 6 has a heat insulating effect during cooling operation of the air conditioner. Thus, it is possible to prevent dew droplets from forming at the air outlet 3.

Further, when performing cooling operation of the air conditioner, it is preferable that the air flow path 6 is not completely closed by the opening/closing means 7, but a slight opening is provided; in this case, the opening/closing means 7 This can prevent dew droplets from forming on some parts of the area.

(Effect of the invention) As explained above, in the indoor unit of the invention, the heat exchanger 5 is bypassed between the outlet of the fan 4 provided in the main body casing 1 and the air outlet 3, and The air flow path 6 is formed to deflect the air flow downward, and the air flow path 6 is provided with an opening/closing means 7 for opening and closing the air flow path 6. Therefore, during heating operation, the opening/closing means 7 diverts the air. By opening the flow path 6, the air blown from the outlet 3 can reach the floor surface, making it possible to perform efficient heating operation with uniform indoor temperature distribution.

[Brief explanation of drawings]

Figure 1 is a longitudinal side view showing the indoor unit of the present invention applied to a ceiling-mounted air conditioner, Figure 2 is a slope view showing the opening/closing means, and Figure 3 is an indoor unit applied to a ceiling-mounted air conditioner. FIG. 4 is a longitudinal sectional side view of the unit, and is a sectional view showing a conventional example. 3...Air outlet, 4...Fan, 5...Heat exchanger, 6...Air flow path, 7...Opening/closing means.

Claims (1)

[Scope of utility model registration request] In an indoor unit of an air conditioner including a heat exchanger 5, a fan 4 that sends air to the heat exchanger 5, and an outlet 3 that blows out the air that has been heat exchanged with the heat exchanger 5, the fan 4 An air flow path 6 that bypasses the heat exchanger 5 and deflects the air flow from the air outlet 3 downward is formed between the outlet of the air outlet 3 and the air outlet 3. An indoor unit for an air conditioner, characterized in that an opening/closing means 7 for opening and closing the air passage 6 is provided.