JPH0979600A - Operating method of air conditioner - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To reduce a draft feeling particularly when performing heating operation in an air conditioner provided with a wall-mounted indoor unit having upper and lower outlets with a suction opening as a boundary. At the same time, there is provided an operation method of an air conditioner capable of reducing noise and performing a comfortable heating operation in which the floor side becomes hot. SOLUTION: The installation height ΔH of the indoor unit 25 is set in the range of 10 cm to 30 cm, and the blowout direction 2 of the blowout port 26 below is set.
8 is inclined downward by 15 ° to 45 ° with respect to the horizontal line, and the blowing direction 29 of the upper outlet 27 is inclined upward by 50 ° to 70 ° with respect to the horizontal line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating method of an air conditioner provided with wall-mounted indoor units having upper and lower outlets with a suction opening as a boundary, and particularly to an operating method during heating operation. Regarding

[0002]

As is well known, there are various types of air conditioners. Among these, there are some that use wall-mounted type indoor units. The wall-mounted indoor unit can be easily installed in an existing building or the like because the rate of reducing the utilization rate of the indoor space is small.

By the way, such a wall-mounted indoor unit is
Normally, the so-called 1-in-1 method is adopted, in which the indoor air sucked from the suction port is blown out from the blow-out port provided below the suction port, and it is installed near the ceiling of the wall surface.

However, the indoor unit adopting such a one-intake and one-outlet system has a problem that it has a strong draft feeling and lacks comfort because the air flow in the room becomes a circulation flow close to a single flow. It was

Therefore, in order to solve the above-mentioned problems, a wall-hanging type indoor unit having a so-called one-suction and two-suction system, which has outlets above and below the inlet, has recently appeared. The indoor unit of the 1-intake and 2-outlet system contacts the indoor air sucked through the intake port with the heat exchanger and then splits the air vertically, and the upper fan and the lower fan are used to separate the upper air outlet and the lower air outlet. It is configured to blow out from the outlet. And usually 1 suck, 1
Like the blow-out type indoor unit, it will be installed near the ceiling on the wall.

Since the indoor unit of the 1-intake and 2-outlet system blows out in the two directions of up and down, it has a great effect of agitating the indoor air and can make the temperature distribution in the room uniform.
In order to obtain the air volume of the intake and the one-blowing type indoor units and the degree of identification, the air volume from each outlet can be halved, and the draft feeling can be reduced and comfort can be improved. It is said that.

However, the above-mentioned 1 suction, 2
Even the wall-mounted indoor unit, which is designed to be installed in a location close to the ceiling, has the following problems.

That is, FIG. 7 shows the result of measuring the indoor temperature distribution at this time by installing a 1-intake, 2-blow-out type indoor unit in the place where it is actually installed near the ceiling of the wall surface and performing steady heating operation. ing. In the figure, 1 is a room, 2a and 2b are walls, 3 is a floor, 4 is a ceiling, 5 is an indoor unit, 6 is a lower outlet of the indoor unit 5, and 7 is an indoor unit. 5
Of the lower outlet 6, reference numeral 8 indicates the outlet direction of the lower outlet 6, and 9 indicates the outlet direction of the upper outlet 7.

The indoor unit 5 is installed at a height of 1.6 m above the floor, the blowing direction 8 is tilted 60 ° downward with respect to the horizontal line, and the blowing direction 9 is tilted 15 ° upward with respect to the horizontal line. . Further, the area indicated by A indicates 26 ° C or higher, the area indicated by B indicates 23 ° C to 26 ° C, and the area indicated by C indicates 23 ° C or lower. The average temperature of the entire room is 23 ° C, the average temperature of 5 cm above the floor is 18 ° C, and the average temperature of 1.8 m above the floor is 25 ° C.
Met.

As is clear from the measurement results, the warm air blown from the lower outlet 6 does not reach the floor 3 due to the low wind speed, and the temperature in the vicinity of the floor is considerably low. In other words, it is an indoor heating environment in which the feet are cold and warm air of 26 ° C. or more flows around the face, giving a feeling of draft due to the air flow. Further, the warm air blown out from the lower outlet 6 is soared by buoyancy, and the draft feeling due to the airflow is rather increased. Further, the warm air blown from the upper outlet 7 flows along the ceiling surface due to the effect of buoyancy due to the low wind speed.

As can be seen from the measurement results,
When the two-blowing type indoor unit 5 is installed in a place near the ceiling 4 on the wall surface and the steady heating operation is performed, the temperature near the floor cannot be raised unless a certain amount of air volume or wind speed is secured. Also, the expected stirring effect cannot be obtained. Therefore, it is necessary to operate at a high air volume or a high wind speed. However, when driving at a high air volume or a high wind speed, the draft feeling due to the air flow is further strengthened and the noise is also increased, which also reduces the comfort level.

[0012]

As described above, when the indoor unit of the one-intake, two-outlet system is installed near the ceiling and the steady heating operation is performed, how to set the air volume or the air speed is set. Even improving comfort was difficult.

Therefore, the present invention can reduce the feeling of draft especially when performing heating operation in an air conditioner including a wall-mounted indoor unit having upper and lower outlets with respect to the intake opening. An object of the present invention is to provide an operation method of an air conditioner capable of reducing noise and performing a comfortable heating operation in which the floor side becomes hot.

[0014]

In order to achieve the above object, the present invention uses an air conditioner comprising a wall-mounted indoor unit having upper and lower outlets with respect to a suction inlet. When performing the heating operation, it is characterized in that the installation height of the indoor unit is set in the range of 10 cm to 30 cm.

It is preferable that the blow-off direction of the lower outlet of the indoor unit is inclined by 15 ° to 45 ° with respect to the horizontal line. Similarly, the blowing direction of the upper outlet of the indoor unit is 50 ° to 70 ° with respect to the horizontal line.
It is preferable to operate by tilting upward.

Further, the inclination of the blowout direction may be set by an optimum wind direction setting device which operates by inputting the installation height information of the indoor unit. When the installation height of the indoor unit is set within the range of 10 cm to 30 cm as described above, the draft direction can be felt without increasing the air volume and speed by properly setting the blowing direction of the lower outlet. Instead, the warm air blown from the lower outlet can flow along the floor surface. Further, by appropriately setting the blowing direction of the upper blowing port, it is possible to exert a great stirring effect without increasing the air volume or the wind speed. Therefore, it is possible to realize an indoor heating environment with less noise, less draft feeling, a substantially uniform indoor temperature distribution, and a warmer floor area.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing an example of indoor unit arrangement for explaining an embodiment of the method of the present invention.

In the figure, 21 is a room, and 22a, 2a.
2b is a wall, 23 is a floor, 24 is a ceiling, 25 is a suction type, 2 blowing type is a wall-mounted indoor unit, and 26 is an indoor unit 5
The lower outlet, 27 is the upper outlet of the indoor unit 25, 28 is the outlet direction of the lower outlet 26, and 29 is the outlet direction of the upper outlet 27.

The indoor unit 25 is installed in a height range of 10 cm to 30 cm from the floor, the blowing direction 28 is inclined 10 ° to 45 ° downward with respect to the horizontal line, and the blowing direction 29 is 50 ° with respect to the horizontal line. It is tilted upward by 70 °.

When the installation height ΔH from the floor is in the above range, the splint can be effectively used for installation, and the lower side blow-out is performed in a state where the installation space of the pipe connecting to the outdoor unit (not shown) is secured. The warm air blown from the mouth 26 can be made to flow along the floor surface.

As shown in FIG. 2, the indoor unit 25 has a lower side after the indoor air sucked through the suction port 33 provided in the front wall 32 of the indoor unit housing 31 is brought into contact with the heat exchanger 34. The structure is such that air is blown from the lower outlet 26 and the upper outlet 27 via the fan 35 and the upper fan 36.

Lower outlet 26 and upper outlet 27
Louvers 39 and 40 for adjusting the blowing direction are rotatably provided in the air conditioner. The blowing angles θ1 and θ2 by the louvers 39 and 40 are the optimum values within the range described above by the wind direction optimum setting device 51 described later. Is set to.

Now, the relationship between the lower outlet angle θ1 and the upper outlet angle θ2 will be described. Lower outlet 26
And when hot air is blown from the upper outlet 27 at the same time,
The warm air blown out from the lower outlet 26 reaches a position on the floor which is separated from the front wall 32 of the indoor unit 25 by L1. The warm air blown from the upper outlet 27 reaches the place on the ceiling surface, which is separated from the wall 22a by L2. At this time, the distance X from the indoor unit 25 at which the person represented by the height H0 does not feel warm air even when approaching the front of the indoor unit 25 is X = (H0-H1-ΔH) × tan θ2 = ΔH / tan θ1
= L1. In addition, H1 is a dimension in the height direction of the indoor unit 25.

The smaller the distance X, the better the result. For example, since θ1 and θ2 increase as the distance X decreases, the warm air blown from the lower outlet 26 immediately collides with the floor surface, stalls, and does not flow along the floor surface again. It is sucked into the suction port 33 of the indoor unit 25. Further, the stirring effect of the hot air blown out from the upper outlet 27 is significantly weakened. Conversely, when the distance X becomes large, θ1 and θ2
Becomes smaller, the warm air blown from the lower outlet 26 and the upper outlet 27 becomes a flow toward the front,
You will feel the draft feeling due to the air flow.

As described above, it is understood that the optimum distance X exists in the indoor heating environment, that is, the optimum θ1 and θ2 exist. The optimum θ 1 and θ 2 depend on the installation height ΔH of the indoor unit 25. In this example, ΔH = 10 cm
Since it is 30 cm, θ1 = 15 ° to 45 °, θ2 =
When in the range of 50 ° to 70 °, X = 30 cm to 50 cm
Thus, it is possible to realize an indoor heating environment in which the draft feeling due to the airflow is small and the vicinity of the floor surface is warm.

FIGS. 3 (a) and 3 (b) are views for explaining the difference in the lower outlet angle θ1 due to the difference in the installation height ΔH. As can be seen from these figures, since the distance X that a person approaches the indoor unit 25 is basically the same, the installation height ΔH
The lower is, the smaller θ1 needs to be.

FIGS. 4A and 4B are views for explaining the difference in the upper outlet angle θ2 due to the difference in the installation height ΔH. As can be seen from these figures, since the distance X that a person approaches the indoor unit 25 is basically the same, the installation height Δ
The higher H is, the smaller θ2 needs to be.

In FIG. 6, a wall-hanging type indoor unit 25 which adopts a one-intake and two-blow-out system is installed on the floor 10 cm in the same manner as in FIG.
The following shows an example of measurement of indoor temperature distribution when installed in the position of No. 1 and operated at the same time with the lower airflow angle θ1 = 15 ° and the upper airflow angle θ2 = 60 ° at the same air volume as shown in Fig. 7. Has been done. The area indicated by A is 26 ° C or higher, and B
The region indicated by is 23 ° C to 26 ° C, and the region indicated by C is 23 ° C or less. The average temperature at 5 cm above the floor is 21 ° C, and the average temperature at 1.8 m above the floor is 24 ° C, showing a uniform temperature distribution with a small temperature difference between the top and bottom. That is, as compared with the conventional example shown in FIG. 7, the indoor heating environment is an environment in which the feet are warm and the draft feeling due to the airflow is hardly felt even though the air volume is the same.

In order to realize a good indoor heating environment, it is necessary to set the optimum blowing angles θ1 and θ2 with respect to the installation height ΔH of the indoor unit 25. Therefore, the wind direction optimum setting device 51 as shown in FIG. 5 is attached, and the angle of the louvers 39 and 40 is changed by the wind direction optimum setting device 51.
Therefore, it is desirable to set the optimum blowing angles θ1 and θ2.

In the wind direction optimum setting device 51 shown in FIG. 5, when the installation height ΔH is input to the installation height input section 52, the blowing angle calculation section 53 causes the functions f1 and f2 whose variables are ΔH.
Then, θ1 and θ2 are calculated, and these θ1 and θ2 are stored in the storage unit 55 of the wind direction changing device control unit 54. Then, when the air conditioner controller 56 outputs the air from above and below at the same time during the heating operation, the louvers 3 are blown up and down by referring to the θ1 and θ2.
The angles of 9 and 40 are controlled.

As a means for taking in the installation height ΔH, in addition to the input by the analog or digital numerical value input means provided in the installation height input section 52, an external terminal using a computer or the like can be used. You may make it input the input by an input means or the output of the sensor which measures the distance with a floor.

[0032]

As described above, according to the present invention,
The comfort during heating operation can be improved without increasing the air volume or speed.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an example of indoor unit installation for explaining an embodiment of a method of the present invention.

FIG. 2 is a schematic configuration diagram of an indoor unit

FIG. 3 is a diagram for explaining the relationship between the indoor unit installation height ΔH and the lower outlet angle θ1.

FIG. 4 is a diagram for explaining the relationship between the indoor unit installation height ΔH and the upper outlet angle θ2.

FIG. 5 is a diagram showing a configuration example of a wind direction optimum setting device.

FIG. 6 is a diagram showing an example of indoor temperature distribution measurement during heating operation in the indoor unit installation example.

FIG. 7 is a diagram showing an example of indoor temperature distribution measurement during heating operation in a conventional indoor unit installation example.

[Explanation of symbols]

 21 ... Room 22a, 22b ... Wall 23 ... Floor 24 ... Ceiling 25 ... Indoor unit 26 ... Lower outlet 27 ... Upper outlet 31 ... Indoor unit housing 32 ... Front wall 33 ... Suction inlet 34 ... Heat exchanger 35 ... Lower fan 36 ... Upper fan 39, 40 ... Louver 51 ... Optimal wind direction setting device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuya Koido 8 Shinsita-cho, Isogo-ku, Yokohama-shi, Kanagawa Inside the Toshiba Living Space Systems Laboratory, Inc. (72) Inventor Ai Kurai, 8 Shinsita-cho, Isogo-ku, Yokohama-shi, Kanagawa Incorporated company Toshiba Living Space Systems Laboratory (72) Inventor Yukinobu Takahashi 8 Shinsita-cho, Isogo-ku, Yokohama, Kanagawa Prefecture Incorporated Toshiba Living Space Systems Laboratory (72) Inventor Hideshi Ishida Shinsugita-cho, Isogo-ku, Yokohama City, Kanagawa Prefecture No. 8 Toshiba Corporation Living Space Systems Laboratory

Claims (4)

[Claims] 1. When performing a heating operation using an air conditioner comprising a wall-mounted indoor unit having upper and lower outlets with a suction port as a boundary, the installation height of the indoor unit is from 10 cm. A method for operating an air conditioner, which is characterized in that it is operated within a range of 30 cm. 2. The method of operating an air conditioner according to claim 1, wherein the air blower is operated by inclining the blowout direction of the lower blowout port of the indoor unit downward by 15 ° to 45 ° with respect to the horizontal line. 3. The method for operating an air conditioner according to claim 1, wherein the air blower is operated with the outlet direction of the upper outlet of the indoor unit being tilted upward by 50 ° to 70 ° with respect to the horizontal line. 4. The air conditioner according to claim 2, wherein the setting of the inclination in the blowing direction is performed by an optimum wind direction setting device that operates by inputting installation height information of the indoor unit. Driving method.