JP2608967B2 - Air conditioner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and in particular, to control of the blown air.

2. Description of the Related Art As a conventional technique, for example, there is an air conditioner as disclosed in Japanese Patent Publication No. 59-34932.

Hereinafter, the conventional technique will be described with reference to FIGS. Reference numeral 1 denotes an indoor unit of a floor-mounted type air conditioner, which is installed on a corner of the room 2. The indoor unit 1 has an outer shell 3, a heat exchanger 4, a fan 5 and a blower 7 composed of a casing 6 arranged vertically. Outlets 8, 8 'are provided at the upper and upper portions of the outer shell 3, and a suction port 9 is provided at the lower front of the outer shell 3, and a louver 10 is provided so that the blowing direction can be changed. It is provided in the center.

A suction temperature detecting means 11 is provided in the vicinity of the suction port 9 to measure the temperature of the suction air, detect a temperature difference from a set temperature, turn on / off the cooling system, and substantially close the inside of the chamber 2. It is kept at various temperatures.

Generally, a floor-standing type air conditioner is often installed at one corner of the room 2, particularly at a perimeter section or the like. Room 2 has ceiling 12,
It is composed of side walls 13, 14 and floor 15. The space enclosed by the two-dot chain line in FIG. 8 is the living area, and ASHRAE.STANDARD defines a space having a height of 1800 mm or less and a distance of 600 mm or more from the side wall as the living area. In other words, human beings are defined as living in the living area of the cat.

The operation of the conventional floor-standing type air conditioner thus configured and installed will be described.

During the cooling operation, the air sucked from the inlet 9 is cooled by the heat exchanger 4 and is blown forward from the outlets 8, 8 'to cool the inside of the living area as shown in Fig. 8a. However, the blown air has a low temperature, has a higher specific gravity than the surrounding air, immediately becomes a downward airflow, flows over the floor 15 surface, and is sucked in again from the suction port 9. As a result, as can be seen from the measured temperature distribution in FIG. However, it is very unpleasant temperature distribution that it is cold. The range indicated by the mesh in the figure is a drafty region (a region where the wind feels strong and uncomfortable), which appears largely in front of the indoor unit 1, and it can be said that a long stay is impossible in front of the indoor unit 1. .

On the other hand, at the time of heating, as opposed to at the time of cooling, the blown air has a high temperature and has a lower specific gravity than the surrounding air. As a result, as shown in FIG. 8b, high-temperature air stagnates near the ceiling 12 of the room 2, and the lower portion becomes low-temperature, so that the head is hot and the feet are cold as in the case of cooling. Temperature distribution.
In addition, as shown by the meshes in the figure, at present, the drafty region also occurs over a very wide range.

Problems to be Solved by the Invention When the indoor unit 1 is installed in a corner of a store, office, or living room to perform air conditioning, warm air is likely to accumulate above the room 2 and cool air is likely to accumulate below, and the temperature distribution is deteriorated. In addition, there is a method of increasing the wind speed of the blown air to improve the reach of the temperature-controlled air in order to maintain a good temperature distribution in the room. However, if the blowing wind speed is increased, for those near the outlet, the blowing wind will directly hit the face and head, causing a feeling of very unpleasant feeling or feeling physically cold. Had the problem that it could not be provided.

On the other hand, if the air is blown out parallel to the side wall 13 so that the air blows out so that the wind does not hit the human body, during cooling, the cool air that hits the ceiling 12 will lose its own weight (it is heavier than the surrounding air because of its low temperature). As it descends while spreading, the room has a relatively uniform temperature distribution without drafty. However, in the heating operation, the hot air hitting the ceiling 12 is lighter than the surrounding air because of the high temperature, so it stays near the ceiling 12 and the temperature distribution in the vertical direction of the living area becomes large and uneven. Had the problem of getting lost.

Also, when furniture such as desks and low partitions are placed near the outlets 8, 8 ', there is a problem that the convection of temperature-controlled air is hindered and the living area does not have a uniform temperature distribution. .

An object of the present invention is to provide an air conditioner that solves the above-described problems and that does not cause discomfort due to wind and that enables ideal comfortable air conditioning of head and foot heat.

Means for Solving the Problems In order to achieve this object, an air conditioner of the present invention comprises an indoor unit having a heat exchanger and a blower for blowing temperature-controlled air conditioned by the heat exchanger. A floor-standing air conditioner installed on one corner floor of the indoor unit, wherein the indoor unit is mounted and forms a lower space between the floor and the indoor unit, and is provided at a lower front part of the indoor unit. An inlet, an upper outlet provided on an upper surface of the indoor unit, a lower outlet provided on a lower surface of the indoor unit and communicating with the lower space, an outlet of the blower, the upper outlet, and the lower blow An air passage communicating with an outlet, a temperature control air at an outlet of the blower provided at a junction of an air passage from the outlet of the blower to the upper outlet and an air passage from the outlet of the blower to the lower outlet. From the outlet of the blower when the temperature is higher than a predetermined temperature When the temperature of the temperature-controlled air at the outlet of the blower is lower than a predetermined temperature, the airflow path toward the upper air outlet is closed to open the airflow path from the outlet of the blower to the lower air outlet. Outlet switching means operable to close the air path toward the outlet and open the air path from the outlet of the blower to the upper air outlet, and the end of the double floor near the side wall of the room remote from the indoor unit And a ventilation port for communicating the lower space and the room with each other. The outlet switching means is constituted by a spring formed of a shape memory alloy and a damper.

Effect of the Invention With the above-described configuration, the present invention detects that the temperature of the temperature-regulated air blown from the blower is high by the blower temperature detecting means during heating, and blows the warm air from the lower outlet by the outlet switching means. put out. Then, the warm air passes through the lower space of the double floor while warming the floor, and is blown into the room from the ventilation port at the end of the double floor. As a result, it is possible to create an ideal thermal environment of a head-and-foot-foot-type which has almost no airflow.

Further, during cooling, the temperature of the temperature-controlled air blown from the blower is detected by the blower temperature detecting means, and the cool air is blown upward from the upper outlet by the outlet switching means, and the opening near the double floor end is opened. Since the air is sucked in from the air, it is possible to create an ideal thermal environment of a head-and-foot-foot type without any discomfort caused by wind.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. The description of the same components as the conventional one is omitted,
Only the differences will be described.

FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 3 is a diagram showing the main part.

Reference numeral 16 denotes an indoor unit of an air conditioner, which is installed on a corner of the room.

The indoor unit 16 has an outer shell 17, a heat exchanger 18, a blower 21 composed of a fan 19 and a casing 20, an upper outlet 22 on an upper surface, a lower outlet 23 on a lower surface, and a suction port 30 on a lower front surface. Reference numeral 24 denotes an air passage provided at the back of the indoor unit 16, and the upper air outlet
The lower outlet 22 communicates with the blower 21.
Reference numeral 25 denotes a plurality of louvers for arbitrarily changing the blowing angle, and is provided at the upper outlet. Reference numeral 26 denotes an air blowing temperature detecting means and an air outlet switching means, which are constituted by a damper 27 having a fulcrum on the outer shell 17, a spring 28, and a spring guide 29. The spring 28 is made of a Ni56% -Ti44% shape memory alloy (deformation temperature 30 ° C.), connects the damper 27 and the bottom of the spring guide 29, and expands when warmed (higher than 30 ° C.) When cooled (below 30 ° C.), it shrinks and drives the damper 27. The spring guide 29 is provided on the lower wall surface of the outlet of the blower 21 in the air passage 24, and has a cylindrical shape having an opening at an upper portion.

31 is a double floor, and 32 is a lower space formed by the floor 15 and the double floor 31.

 The lower outlet 23 communicates with the lower space 32.

Reference numeral 33 denotes a ventilation port which communicates with the room at the end where the double floor 31 and the side wall 14 meet, and this position is the lower outlet 23
From the side wall 14 and 600 mm from the side wall 14
The best position is within a range that does not interfere with human access or office furniture (such as archives).

Next, the operation of the air conditioner configured as described above will be described.

First, at the time of heating, as shown by solid arrows in FIGS. 1 and 2, the room air sucked from the suction port 30 is warmed by the heat exchanger 18 and then is blown from the blower 21 to the air path 24. To be blown out. At this time, since the temperature of the blown air is higher than 30 ° C., the spring 28 extends along the spring guide 29 and pushes the damper 27 upward. And
The warm air flows downward in the air passage 24, and the lower outlet 23
And blows through the lower space 32 of the double floor 31 and blows out from the ventilation port 33. At this time, the warm air is
, While passing from below, the temperature of the double bed 31 rises, and the room 2 is indirectly warmed by natural convection. The warm air blown out from the ventilation port 33 is sucked from the suction port 30 while warming the chamber 2.

An embodiment of the temperature distribution by the inventor when actually heating in this way is shown in Fig. 5b. The temperature distribution above and below the living area is 1 to 1.5 ° C, and air conditioning with almost no temperature unevenness is possible. Becomes Further, the drafty area is slightly seen in the vicinity of the ventilation opening 33 outside the living area, but for the people in the living area, there is no feeling of discomfort due to the wind.

Moreover, the surface temperature of the double floor 31 is 2-3 ° C. higher than the temperature near the feet, and due to the effect of warm radiation from the double floor 31 surface,
The body temperature rises from the feet to the waist, creating an ideal warm air environment with head-and-foot heat.

On the other hand, at the time of cooling, as shown by the dotted arrows in FIGS. 1 and 3, the room air sucked from the suction port 30 is cooled by the heat exchanger 18 and then is blown from the blower 21 to the air path 24. To be blown out. At this time, since the temperature of the blown air is lower than 30 ° C., the spring 28 contracts along the spring guide 29 and pulls the damper 27 downward. Then, the cool air flows upward in the air passage 24, blows out from the upper outlet 22, hits the ceiling 12, and descends while spreading downward by its own weight. And after cooling down the living area,
It is sucked through the suction port 30.

The actual measurement example of the temperature distribution by the inventor when actually cooling in this way is shown in FIG. 5a, and it can be said that the upper and lower temperature distribution in the living area is about 2 ° C., and there is almost no distribution. Also, the drafty area is shown with a mesh, but it is outside the living area and on the ceiling.
It occurs only in the area close to 12, and does not feel any discomfort due to the wind for humans in the residential area.

As described above, the air conditioner of the present embodiment has an indoor unit 16 having a built-in heat exchanger 18 and a blower 21 for blowing the temperature-controlled air air-conditioned by the heat exchanger 18, which is installed on a corner floor of the room. A floor-mounted air conditioner, on which the indoor unit 16 is mounted.
15, a double floor 31 forming a lower space 32, and the indoor unit 16
A suction port 30 provided at a lower portion of the front of the indoor unit 16, an upper outlet 22 provided at an upper surface of the indoor unit 16, a lower outlet 23 provided at a lower surface of the indoor unit 16 and communicating with a lower space 32, and a blower 21. An air passage 24 for communicating the outlet with the upper outlet 22 and the lower outlet 23;
A blower provided at the junction of the air path from the outlet 21 to the upper outlet 22 and the air path from the outlet of the blower 21 to the lower outlet 23
When the temperature of the conditioned air at the outlet of the outlet 21 is higher than the predetermined temperature, the air passage from the outlet of the blower 21 to the upper outlet 22 is closed, and the air passage from the outlet of the blower 21 to the lower outlet 23 is opened. When the temperature of the temperature-controlled air is lower than the predetermined temperature, the air outlet switching that operates to close the air passage from the outlet of the blower 21 to the lower air outlet 23 and open the air passage from the outlet of the air blower 21 to the upper air outlet 22 Means 26 and a ventilation opening 33 for communicating the room with a lower space 32 provided at the end of the double floor 31 near the side wall 14 of the room remote from the indoor unit 16, so Hot air is blown into the lower space 32 of the double floor 31 from the outlet 23, and while the double floor 31 is warmed, the ventilation opening near the double floor end
Since it blows out from 33, warm air is not directly applied to the humans in the living area, and it is heated from the double floor 31 under the living area, so that a very uniform temperature distribution is obtained and the effect of warm radiation from the floor surface And high quality air conditioning can be realized.

In addition, during cooling, cool air is blown upward from the upper outlet 22 of the air conditioner, hits the ceiling 12, and then falls naturally under the weight of the cool air, so that a space with a very uniform temperature distribution without discomfort due to wind And can be.

In addition, even when air-conditioning air is not directly blown into the living area during cooling and heating, even if furniture such as desks and low partitions are installed, the convection of the temperature-controlled air is not hindered, and the living area has a uniform temperature distribution. And high-quality air conditioning can be realized.

In addition, by driving the damper with a spring made of shape memory alloy to switch the air outlet during cooling and heating, the driving noise can be reduced compared to when switching with a motor, and the reliability of the drive unit is improved. Can be.

In the present embodiment, the lower space is formed by a double floor, but it goes without saying that the same effect can be obtained even if the lower space is provided under the floor.

In addition, using bi-meral for the blast temperature detection means and using a damper and motor for the air outlet switching means,
It goes without saying that the same effect can be obtained by switching the air outlet during cooling.

Advantages of the Invention As is clear from the above embodiments, the air conditioner of the present invention has an indoor unit including a heat exchanger and a blower that blows the temperature-controlled air conditioned by the heat exchanger. A floor-standing air conditioner installed on the floor, wherein the indoor unit is mounted and a double floor forming a lower space between the floor and the floor,
A suction port provided at a lower portion of the front of the indoor unit, an upper outlet provided at an upper surface of the indoor unit, a lower outlet provided at a lower surface of the indoor unit and communicating with the lower space, and An air path for communicating an outlet, the upper air outlet, and the lower air outlet, and a junction of an air path from the air outlet of the blower to the upper air outlet and a wind path from the air outlet of the blower to the lower air outlet. When the temperature of the temperature-controlled air at the outlet of the blower is higher than a predetermined temperature, the air passage from the outlet of the blower to the upper outlet is closed, and the air passage from the outlet of the blower to the lower outlet is opened. When the temperature of the temperature-controlled air at the outlet of the blower is lower than a predetermined temperature, the air passage from the outlet of the blower to the lower outlet is closed and the air passage from the outlet of the blower to the upper outlet is opened. Air outlet switching A step, and a ventilation opening communicating between the lower space provided at the end of the double floor near the side wall of the room away from the indoor unit and the room and the room, so that the lower space of the double floor during heating is provided. The double floor is warmed by passing warm air through it, and radiant heating effect is provided from below the living area, while convection heating is performed by blowing warm air upward along the side wall from the ventilation opening at the end of the double floor And air conditioning can be performed without discomfort due to air currents because heating in the living area can be performed without direct contact with warm air. Also, during cooling, convection cooling air is blown upward from the upper outlet of the upper surface of the indoor unit along the side wall and lowered by the weight of the cool air to suck in from the inlet provided at the lower front part of the indoor unit. There is no discomfort due to the wind, and it is not affected by the installation of furniture.

In addition, by configuring the air outlet switching means with a spring formed of a shape memory alloy and a damper, the driving sound at the time of air outlet switching during heating and cooling is reduced, and the reliability of the driving unit is increased. Therefore, it is possible to provide an air conditioner that is comfortable not only in temperature distribution but also in noise.

[Brief description of the drawings]

FIG. 1 is a sectional view of an air conditioner showing one embodiment of the present invention,
2 and 3 are cross-sectional views showing the main parts of the air conditioner.
FIG. 4 is a perspective view of a room in which the air conditioner is installed, and FIG. 5 is a temperature distribution diagram taken along a line AA in FIG.
Fig. A is a temperature distribution diagram during cooling operation, b is a temperature distribution diagram during heating operation,
FIG. 7 is a cross-sectional view of a conventional air conditioner, FIG. 7 is a perspective view of the conventional air conditioner, and FIG. 8 shows a temperature distribution of a room in which the conventional air conditioner is installed. a is a temperature distribution diagram during a cooling operation, and b is a temperature distribution diagram during a heating operation. 16 …… Indoor unit, 18 …… Heat exchanger, 21 …… Blower, 22 ……
Upper outlet 23, Lower outlet 24, Air passage 26 Air blowing temperature detecting means, Air outlet switching means 27 Damper 28 Spring 31 Double floor 32 Lower space, 33 ... Ventilation opening.

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Akira Nakano 3-22, Takaidahondori, Higashiosaka-shi, Osaka Matsushita Refrigeration Machinery Co., Ltd. (56) References JP-A-1-219433 (JP, A)

Claims (2)

(57) [Claims] 1. A floor-mounted air conditioner in which an indoor unit including a heat exchanger and a blower for blowing temperature-controlled air air-conditioned by the heat exchanger is installed on one corner floor of the room. ,
A double floor on which the indoor unit is mounted and forms a lower space between the floor and a suction opening provided at a lower front part of the indoor unit,
An upper outlet provided on the upper surface of the indoor unit, a lower outlet provided on the lower surface of the indoor unit and communicating with the lower space,
An air passage communicating the outlet of the blower, the upper outlet and the lower outlet, an air passage from the outlet of the blower to the upper outlet, and an air passage from the outlet of the blower to the lower outlet. When the temperature of the conditioned air at the outlet of the blower provided at the branch point is higher than a predetermined temperature, the air passage from the outlet of the blower to the upper outlet is closed, and the air passage from the outlet of the blower to the lower outlet is provided. When the temperature of the conditioned air at the outlet of the blower is lower than a predetermined temperature, the air path from the outlet of the blower to the lower outlet is closed, and the air path from the outlet of the blower to the upper outlet is opened. An air conditioner comprising: an air outlet switching unit that operates at a distance from the indoor unit; and a ventilation port that communicates the lower space provided at an end of the double floor near the side wall of the room distant from the indoor unit with the room. 2. The air conditioner according to claim 1, wherein the air outlet switching means is constituted by a spring formed of a shape memory alloy and a damper.