JP2016138716A - Ceiling-embedded type indoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling-embedded type indoor unit which is excellent in indoor air agitation effect, and attains rapid homogenization of indoor air.SOLUTION: A ceiling-embedded type indoor unit includes an air conditioner where a plurality of blowout port is formed so as to be along its lower surface peripheral part, a plurality of flaps 30 which are turnably set to the blowout port and each of which can independently change a vertical wind angle, and a control part 40 which controls the unit so as to serially perform the following steps: a first step of placing a pair of flaps 30 of the flaps 30 at a lower most position and also placing other pair of flaps 30 at an intermediate position; a second step of placing all the flaps 30 at a lowermost position; and a third step of placing the pair of flaps 30 at an intermediate position and also placing the other pair of flaps 30 at the lowermost position.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a ceiling-mounted indoor unit of an air conditioner, and in particular, an air conditioner in which at least four horizontal blades each capable of independently changing the vertical airflow direction angle are provided at an outlet. The present invention relates to a ceiling-mounted indoor unit.

Conventionally, as an indoor unit of an air conditioner, there is a type that is installed on a ceiling in a room.
As such an indoor unit, conventionally, for example, four horizontal blades are provided corresponding to each side of the lower surface of the casing, and the first horizontal blades that are two horizontal blades adjacent to each other among the horizontal blades are the same in synchronization. A technique is disclosed in which each horizontal blade is controlled so as to swing while taking the posture and the combination of the first horizontal blades is sequentially shifted one by one along the peripheral edge (for example, Patent Document 1). reference.).

Japanese Patent No. 5500191

  However, in the prior art, a part of the horizontal blades is controlled so as to be always located at the intermediate position, so that the efficiency of stirring the indoor air is poor and it takes time to equalize the indoor air. Has the problem.

  The present invention has been made in view of the above-described points, and an object thereof is to provide a ceiling-embedded indoor unit that has a high agitation effect of indoor air and that can quickly equalize indoor air. .

  In order to achieve the above object, the present invention provides a ceiling-embedded indoor unit provided on the ceiling of an air-conditioning room, wherein the air conditioner has a plurality of air outlets formed along the peripheral edge of the lower surface, and the air outlet. A plurality of flaps that are provided at the mouth so as to be rotatable and that can independently change the vertical wind direction angle, and the pair of flaps of the flaps are positioned at the lowermost position. A second step of positioning the other pair of flaps in an intermediate position, a second step of positioning all the flaps in a lowermost position, a pair of the flaps in an intermediate position, and another pair of flaps. And a third step of positioning the flap at the lowest position, and a control unit that performs control so as to sequentially perform.

  In the above configuration, the control unit controls the operation of the flap in the order of the first step, the second step, the third step, the second step, and the first step. It is characterized by that.

  In the above configuration, the control unit performs control to position the flap at five stages of wind direction angles, the lowest position of the flap is a fifth stage, and an intermediate position of the flap. Is the position of the third stage.

  Moreover, the said structure WHEREIN: Four said flaps are provided along the peripheral part of the lower surface of the said air conditioner, A pair of said flaps are a pair of opposing flaps, It is characterized by the above-mentioned.

  Moreover, the said structure WHEREIN: Four said flaps are provided along the peripheral part of the lower surface of the said air conditioner, A pair of said flap is a pair of adjacent flaps, It is characterized by the above-mentioned.

  As described in the above description, according to the present invention, the first step of positioning the pair of flaps in the lowermost position and the other pair of flaps in the intermediate position, and all the flaps are performed. Since the second step that is positioned at the lowermost position and the third step that positions the pair of flaps at the lowermost position and the other pair of flaps are positioned at the lowermost position are sequentially performed. The stirring efficiency can be increased, and the room air can be made uniform quickly.

It is a longitudinal section showing an embodiment of a ceiling installation type indoor unit concerning the present invention. It is the top view seen from the room inner side of the ceiling installation type indoor unit of this embodiment. It is sectional drawing of the flap part of the ceiling installation type indoor unit of this embodiment. It is a block diagram which shows the control structure of the ceiling installation type indoor unit of this embodiment. FIG. 5A is an explanatory diagram showing the operation of the circular operation, and FIG. 5B is an explanatory diagram showing another operation of the circular operation. FIG. 6A is a timing chart showing the operation of each flap during the circular operation, and FIG. 6B is a timing chart showing another operation of each flap during the circular operation. It is a flowchart which shows operation | movement of this embodiment. FIG. 8A is an explanatory diagram seen from the lateral direction showing the installation position of the thermocouple for temperature measurement in this embodiment, and FIG. 8B is the upward direction showing the installation position of the thermocouple for temperature measurement in this embodiment. It is explanatory drawing seen. It is a table | surface which shows the temperature measurement result in this embodiment.

Hereinafter, an embodiment of a ceiling-embedded indoor unit according to the present invention will be described with reference to the drawings.
FIG. 1 is a side sectional view of a ceiling-embedded indoor unit according to an embodiment of the present invention, and FIG. 2 is a plan view of a decorative panel of the ceiling-embedded indoor unit as viewed from the indoor side. FIG. 3 is a cross-sectional view of the flap portion of the ceiling-mounted indoor unit.
In the present embodiment, as shown in FIG. 1, the ceiling-embedded indoor unit 10 is installed in a ceiling space 13 between a ceiling 11 of a building and a ceiling plate 12 installed below the ceiling 11. Is.
The ceiling-embedded indoor unit 10 includes an air conditioner main body 14 formed in a box shape with an open lower surface, as shown in FIG. It is installed in a manner that can be suspended from. Inside the air conditioner main body 14, a heat insulating member 16 made of polystyrene foam is disposed in contact with the inner surface of the side plate 17 of the air conditioner main body 14 to prevent condensation on the side plate 17.

A fan motor 21 is attached to the lower surface of the upper plate of the air conditioner main body 14, and a rotary shaft 22 that is rotationally driven by the drive of the fan motor 21 extends downward from the fan motor 21. Is provided. An impeller 23 is attached to the lower end portion of the rotating shaft 22, and the fan motor 21 and the impeller 23 constitute the blower 20.
Between the air blower 20 and the heat insulating member 16, a heat exchanger 18 that is bent in a substantially square shape in a plan view is disposed so as to surround the side of the air blower 20.

The heat exchanger 18 functions as a refrigerant evaporator during the cooling operation, and functions as a refrigerant radiator during the heating operation. The heat exchanger 18 exchanges heat between the indoor air sucked into the air conditioner main body 14 and the refrigerant, cools the air in the air-conditioned room during the cooling operation, and heats the indoor air during the heating operation. It is configured to be able to.
Further, a drain pan 19 is disposed below the heat exchanger 18 so as to correspond to the lower surface of the heat exchanger 18. The drain pan 19 is for receiving drain water generated in the heat exchanger 18. Further, a suction port 24 of the blower 20 is formed in the central portion of the drain pan 19.

Further, as shown in FIGS. 1 and 2, a substantially rectangular decorative panel 25 is attached to the lower surface of the air conditioner body 14 so as to cover the lower opening of the air conditioner body 14.
A suction port 26 communicating with the suction port 24 of the drain pan 19 is formed in the central portion of the decorative panel 25. A suction grille 27 covering the suction port 26 is detachably attached to the suction port 26 portion. Yes. On the air conditioner body 14 side of the suction grill 27, a filter 28 for removing dust in the air is provided.

  Air outlets 29 for sending air after air conditioning into the room are formed at positions outside the suction port 26 of the decorative panel 25 and along each side of the decorative panel 25. Then, by rotating the rotating shaft 22 by the fan motor 21 and rotating the impeller 23, the indoor air is sucked from the suction ports 24 and 26, passes through the filter 28 and then passes through the heat exchanger 18. Thus, heat exchange is performed, and air after the air conditioning is sent from the air outlet 29 into the room.

Each air outlet 29 is provided with a flap 30 for changing the air direction, as shown in FIGS. Support shafts (not shown) are provided at both ends of each flap 30, and are formed so as to be rotatable about the support shaft by supporting the support shafts at both ends of the air outlet 29. Yes. In addition, a hinge part 31 is provided at the center in the longitudinal direction of the back surface of each flap 30 (the surface on the air conditioner main body side). The flaps 30 can be rotated independently by being driven.
In the present embodiment, the flap 30 is configured so that the angle can be adjusted in five stages from the first stage (F1) to the fifth stage (F5). The first stage is a position where the angle is the smallest and the wind is blown out in the lateral direction, and the fifth stage is the position where the angle is the largest and the wind is blown out almost right below.

  A floor temperature sensor 33 and a human sensor 34 are attached to the corners of the decorative panel 25, respectively. The floor temperature sensor 33 detects the temperature of the floor surface in the room, and the human sensor 34 detects whether or not a person exists in the room or the position of the person.

Next, the control configuration in the present embodiment will be described.
FIG. 4 is a block diagram showing a control configuration of the present embodiment. As shown in FIG. 4, in the present embodiment, for example, a control unit 40 including a CPU and a memory and operated based on a predetermined program is provided, and the control unit 40 includes a ceiling-embedded indoor unit. Control the operation of each component device.
Further, a floor temperature sensor 33 for detecting the indoor floor temperature and a human sensor 34 for detecting a person in the room are connected to the control unit 40. The control unit 40 is configured to input detection results such as the indoor floor temperature by the floor temperature sensor 33 and the presence / absence of a person by the human sensor 34 and control operations of the fan motor 21 and the flap drive motor 32. .
For example, based on an instruction from a remote controller (not shown) installed indoors, the control unit 40 drives the fan motor 21 according to the floor temperature detected by the floor temperature sensor 33 to operate the blower 20. Alternatively, the swing control of the flap 30 is performed so that the flap 30 can be blown toward the person according to the presence or absence of the person detected by the human sensor 34 or the position of the person.

Here, in the present embodiment, when the floor temperature detected by the bed temperature sensor 33 falls below a certain level, the control unit 40 performs a circular operation of stirring the indoor air.
FIG. 5 is an explanatory diagram showing the operation of the circular operation. FIG. 6 is a timing chart showing the operation of each flap 30 during the circular operation.
As shown in FIGS. 5 (a) and 6 (a), the circulating operation is composed of three steps (first to third steps) according to the rotational position of the flap 30 in this embodiment. Has been.

  The first step is an operation in which a pair of flaps 30 facing each other are positioned in the fifth stage (F5), and another pair of flaps 30 are positioned in the third stage (F3) to blow air for a certain period of time. . The second step is an operation in which all the flaps 30 are positioned in the fifth stage (F5) and air is blown for a certain time. In the third step, the flap 30 positioned in the fifth stage (F5) in the first step is positioned in the third stage (F3) and also in the third stage (F3) in the first step. In this operation, the flap 30 is positioned in the fifth stage (F5) and air is blown for a certain period of time.

  In the present embodiment, the control unit 40 sequentially performs the second step and the third step from the first step, and returns to the second step and the first step from the third step. Is to control. In other words, in the present embodiment, control is performed with a second step of positioning all the flaps 30 in the fifth stage (F5) between the first step and the third step.

In the present embodiment, in the first step and the third step, the air is blown in a combination of the fifth stage (F5) and the third stage (F3). However, the present invention is not limited to this. .
That is, in the present embodiment, the first stage and the second stage among the first stage to the fifth stage are set at an angle at which the wind does not hit the person in the room, so the wind hits the person. The third stage (F3) is used as the position having the smallest angle. Therefore, for example, if the wind direction angle of the flap 30 is 6 steps or more, it is possible to perform the combination of the fourth step and the sixth step, and if it is four steps, the second step and the fourth step are performed. It can also be done in combination.

Further, as another operation of the first step, for example, as shown in FIG. 5B and FIG. 6B, the adjacent pair of flaps 30 are positioned in the fifth stage (F5), and others. In this operation, the pair of flaps 30 is positioned in the third stage (F5) and air is blown for a certain period of time. In this case, the third step is to place the flap 30 positioned in the fifth stage (F5) in the first step in the third stage (F5) and to the third stage (F5) in the first step. In this operation, the positioned flap 30 is positioned in the fifth stage (F5) and air is blown for a certain time.
It is possible to arbitrarily set the operation of the circular operation.

Next, the operation of this embodiment will be described with reference to the flowchart shown in FIG.
In the present embodiment, when the heating operation is performed (ST1), when the floor temperature detected by the bed temperature sensor 33 becomes a certain value or less (ST2), the circulating operation is started (ST3). .
As described above, in the circular operation, first, the operation of the first step is performed, and the pair of flaps 30 facing each other are positioned in the fifth stage (F5), and the other pair of flaps 30 are placed in the third stage. It is located at (F3) and blows for a certain period of time (ST4).

Next, the operation of the second step is performed, and all the flaps 30 are positioned in the fifth stage (F5) and air is blown for a certain time (ST5). Subsequently, the operation of the third step is performed, and the pair of flaps 30 is positioned in the third stage (F3), and the other pair of flaps 30 is positioned in the fifth stage (F5) and air is blown for a certain period of time. (ST6).
Then, after performing the operation of the second step (ST7), the operation of the first step is performed (ST8). These series of operations are repeated until the bed temperature reaches a certain value or more.

In the present embodiment, an experiment was conducted to measure the temperature of the room when the circular operation was performed in the room where the ceiling-embedded indoor unit 10 was installed.
8A and 8B are explanatory views showing the installation positions of thermocouples for temperature measurement. FIG. 8A is a diagram seen from the side, and FIG. 8B is a diagram seen from the top. As shown in FIG. 8, thermocouples 50 were installed in the central portion and the peripheral portion of the ceiling-embedded indoor unit. The horizontal distance between the thermocouples 50 was 1.5 m, and the thermocouples 50 were installed at positions 10 cm, 1 m, 2 m, and 3 m from the floor in the indoor height direction.

The room temperature was adjusted to 20 ° C. and the outdoor temperature was adjusted to 3 ° C., and cold air was forcibly sent from the outside to the inside with a blower. Thus, a state was created in which the temperature above 1 m from the indoor floor surface was 19 ° C. and the temperature below 1 m from the indoor floor surface was 17 ° C.
In a state where the set temperature of the remote controller was set to 24 ° C., a circulating operation was performed with the rotational speed of the blower fan set to 470 rpm, and the time until the room temperature became uniform was measured. In this case, when the average temperature of 1 m or less from the floor surface reached 21 ° C., it was judged that the temperature was made uniform.

FIG. 9 shows the experimental results. According to this experimental result, when the operation of the flap 30 shown in FIG. 5A was performed, the average temperature of 1 m or less reached 21 ° C. earliest in 4 minutes and 20 seconds. When the operation of the flap 30 shown in FIG. 5B was performed, the average temperature of 1 m or less reached 21 ° C. relatively quickly in 4 minutes and 30 seconds.
On the other hand, when the air was blown in a state in which the flap 30 was fixed to the fifth stage facing downward, it was 5 minutes and 20 seconds. Further, it is disclosed in Patent Document 1 in which adjacent pairs of flaps 30 are placed in the fifth stage, other pairs of flaps 30 are placed in the third stage, and the position of the flaps 30 is gradually shifted to blow air. It was 6 minutes and 10 seconds when the flap 30 was operated, and 6 minutes and 40 seconds when the flap 30 was normally swung.
From this, it can be seen that the operation of the flap 30 in the present embodiment has a high agitation effect of indoor air.

  As described above, in the present embodiment, the first step, the second step, and the third step are sequentially performed, and the second step is always performed between the first step and the third step. As a result, the efficiency of stirring the indoor air can be increased, and the room air can be made uniform quickly.

  Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the above-described embodiments and can be modified without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 10 Ceiling embedded indoor unit 14 Air conditioner main body 18 Heat exchanger 20 Blower 21 Fan motor 23 Impeller 25 Cosmetic panel 29 Outlet 30 Flap 32 Flap drive motor 33 Floor temperature sensor 34 Human sensor 40 Control part

Claims (5)

A ceiling-embedded indoor unit provided on the ceiling of the air conditioning room,
An air conditioner having a plurality of outlets formed along the peripheral edge of the lower surface;
A plurality of flaps that are rotatably provided at the outlet and are capable of independently changing the vertical wind direction angle,
A first step of positioning a pair of the flaps of the flaps in a lowermost position and a second pair of the flaps in an intermediate position; a second step of positioning all the flaps in a lowermost position; A ceiling-embedding is provided, comprising: a control unit that controls to sequentially perform the third step of positioning the pair of flaps at an intermediate position and positioning the other pair of the flaps at the lowest position. Built-in indoor unit.   The control unit controls the operation of the flap in the order of the first step, the second step, the third step, the second step, and the first step. Item 2. A ceiling-embedded indoor unit according to item 1.   The control unit performs control to position the flap at five stages of wind direction angles, the lowest position of the flap is the fifth stage, and the intermediate position of the flap is the third stage. The ceiling-embedded indoor unit according to claim 1 or 2, wherein the indoor unit is a position.   The said flap is provided along the peripheral part of the lower surface of the said air conditioner, and the said flap of a pair is a pair of flap which opposes, The any one of Claims 1-3 characterized by the above-mentioned. The ceiling-embedded indoor unit according to Item.   The said flap is provided along the peripheral part of the lower surface of the said air conditioner, and the said flap of a pair is a pair of adjacent flaps, The any one of Claims 1-3 characterized by the above-mentioned. The ceiling-embedded indoor unit according to Item.

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