JP3820799B2 - Air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner, and more particularly to a technology for improving comfort by reducing radiation from indoor windows and walls and reducing a draft feeling.
[0002]
[Prior art]
2. Description of the Related Art An air conditioner that adjusts room temperature by supplying warm air or cold air into a room is known as a so-called forced convection type air conditioner. However, when the difference between the indoor temperature and the outdoor temperature is large, for example, in the case of heating operation in a cold district, the temperature of the indoor windows and walls may be considerably lower than the indoor air temperature. In such a case, the air in the vicinity of the window or wall is cooled and becomes colder than the air in the center of the room, and this low-temperature air comes into direct contact with the occupant, resulting in a so-called cold draft feeling and indoor comfort. There is a risk of damage.
[0003]
Therefore, conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 5-340553, air in the vicinity of the window and the wall surface enters the central portion of the room by forming an air barrier at an appropriate temperature in the perimeter zone near the window and the wall surface. Air conditioning devices have been proposed that prevent this and prevent hot flashes in summer and cold drafts in winter.
[0004]
[Problems to be solved by the invention]
However, in the conventional air conditioner, an air inlet is provided in the vicinity of the window or the wall so that the air forming the air barrier does not enter the indoor living area and cause a draft feeling. In other words, a conventional air conditioner has an air blower provided at one of the upper and lower portions of the perimeter zone and an air suction port provided at the other, thereby allowing air of appropriate temperature to flow from one to the other to form an air barrier. It was. Therefore, the air outlet and the air inlet must be provided above and below the perimeter zone, which increases the size of the entire apparatus and increases the manufacturing and installation costs. In addition, many conventional air conditioners are premised on integration with a building, and none can be easily installed on an existing building.
[0005]
The present invention has been made in view of such a point, and an object of the present invention is an air conditioner that improves comfort by processing an air conditioning load of a perimeter zone, and is provided for an existing building. An object of the present invention is to provide a compact air conditioner that is easy to install.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, conditioned air is supplied along a window or wall in a planar shape extending from the lower side of the perimeter zone to the upper side and the left and right directions.
[0007]
Specifically, the air conditioner according to the present invention is installed on the floor or near the floor near the window or on the wall, and the conditioned air (30) is parallel to the window or wall and spreads in both the upper and left and right directions. Air conditioner to be supplied in the form of a wall, placed on the floor of the window or on the floor of the wall in parallel with the window or wall surface, air inlets (11) are formed on the front facing the room, A casing (3) having an air outlet (12, 13, 14) formed on the upper surface, and a heat exchanger (4) provided behind the air inlet (11) in the casing (3), A turbo fan (5, 6) provided so that a rotating shaft extends in the horizontal direction behind the heat exchanger (4) in the casing (3), and a blade of the turbo fan (5, 6) ( 23, 26) covers a plurality of guide vanes (31, 32) curved in the opposite direction to the curving direction of the turbo fan (5, 6). And a wind direction guide and (7,8) formed by concentrically arranged with the turbofan (5,6) to.
[0008]
Due to the above-described matters, the planar hot air or the cold air (conditioned air) is supplied in parallel with the window surface or the wall surface, so that a hot or cold zone is formed at the window or the wall. As a result, the air cooled or heated by the window or wall is prevented from coming into direct contact with the occupant, and the comfort in the room is improved. In addition, since the conditioned air is supplied so as to spread in both the upper and left and right directions, it is not necessary to provide an air outlet at the entire wall of the room, and it becomes easy to configure the device compactly. Easy installation.
[0009]
In addition, due to the above matters, since the turbo fan is installed vertically, it is easy to reduce the thickness of the unit. In addition, since the guide vanes of the wind direction guide are curved in the direction opposite to the curved direction of the blades of the turbofan, the swirl direction component of the air blown from the turbofan is converted into the radial component, and the blown air is uniformly distributed. It will spread and be blown out.
[0010]
The turbo fan is composed of first and second turbo fans (5, 6) arranged on the left and right sides, and the wind direction guide is arranged to cover the first and second turbo fans (5, 6). The first and second wind direction guides (7, 8) may be included.
[0011]
By the said matter, the more suitable specific structure for supplying conditioned air in the planar shape which is parallel to a window surface or a wall surface, and spreads in the upper direction and the left-right direction is obtained.
[0012]
The air conditioner preferably blows out conditioned air (30) from the air outlet (12, 13, 14) at a wind speed of 2 m / s or less.
[0013]
Due to the above, conditioned air is blown out at a low speed, so the draft feeling in the room is reduced.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
As shown in FIG.1 and FIG.2, the air conditioning apparatus which concerns on this embodiment is a heat pump type air conditioning apparatus provided with what is called a floor type indoor unit (1) and an outdoor unit (not shown). The indoor unit (1) is installed on the floor of a so-called perimeter zone (2) such as a window or a wall in the room.
[0016]
The casing (3) of the indoor unit (1) is formed in a thin, substantially rectangular parallelepiped shape that is long in the left-right direction. An air suction port (11) is formed in the front surface of the casing (3) (a surface facing the center of the room), and an upper air outlet (12) and a left air An outlet (13) and a right air outlet (14) are formed.
[0017]
As shown in FIGS. 3 and 4, a heat exchanger (4) is provided in the casing (3) behind the air suction port (11), and the first and the first are located behind the heat exchanger (4). Two turbo fans (5) and (6) are provided. The first and second turbofans (5) and (6) are installed vertically so that the rotation shaft extends in the horizontal direction, and are arranged in the left-right direction.
[0018]
Around the first and second turbofans (5) and (6), there is a first step for eliminating the swirling component of the air flow blown out from the impellers (21) and (24) and making the blowing direction radial. First and second wind direction guides (7) and (8) are provided. Specifically, the first wind direction guide (7) has a plurality of guide vanes (31) curved in the opposite direction to the blade (23) of the first impeller (21), and the left side of the first impeller (21). The first impeller (21) is arranged concentrically so as to cover the upper side from the top. Similarly, the second wind direction guide (8) has a plurality of guide vanes (32) curved in the opposite direction to the blades (26) of the second impeller (24). Is arranged concentrically with the second impeller (24) so as to cover. Note that (22) and (25) are fan motors for rotating the impellers (21) and (24), and (22a) and (25a) are rotating shafts.
[0019]
As shown in FIG. 3, the left air outlet (13) and the right air outlet (14) have guide vanes (33), (34) inclined downward to blow conditioned air to the left and right floor surfaces. May be provided.
[0020]
In the indoor unit (1), the rotational speed of the turbo fans (5) and (6) is such that the air is discharged from the air outlets (12), (13) and (14) at a low speed (for example, 1 to 2 m / s). It is set to blow out.
[0021]
Next, the operation of the air conditioner will be described. During the heating operation, the room air is sucked into the casing (3) through the air suction port (11) and is heated when passing through the heat exchanger (4). The high-temperature air heated by the heat exchanger (4) is blown out of the impellers (21) and (24) by the turbo fans (5) and (6). At this time, as shown in FIG. 5, the swirl direction component u of the flow velocity w of the air blown out from the impellers (21) and (24) is considerably larger than the radial component v. Therefore, if there is no wind direction guide (7), (8), it will be difficult to blow out air radially from the air outlets (12), (13), (14). However, according to this indoor unit (1), the guide vanes (31), (32) of the wind direction guides (7), (8) are curved to the opposite side of the blades of the impellers (21), (24). As a result, the air flow from the impellers (21) and (24) is converted into radial components by the guide vanes (31) and (32) and blown out radially. In other words, by providing the wind direction guides (7), (8), the swirling flow from the impellers (21), (24) is redirected radially, and the air outlets (12), (13), It flows out from the casing (3) through (14) in a circular arc shape extending across the left and right sides and the upper side. In order to reduce the draft feeling in the room, the temperature of the air blown out from the air outlets (12), (13), (14) should be about 10-13 ° C. higher than the room temperature. preferable.
[0022]
As shown in FIG. 2, the warm air (30) blown out from the indoor unit (1) slowly spreads in an arc along the wall or window while warming the cool air in the perimeter zone (2). ) To form a thermal curtain almost parallel to the wall surface. Therefore, the downdraft in which the cold air near the window surface or the wall surface enters the living area (for example, the area within 0.5 m from the wall surface and within 1.8 m from the floor surface) (15) from the floor surface is prevented. Moreover, the window and the wall are heated by the warm air (30), and the temperature thereof is close to room temperature. Therefore, the cold radiation of windows and walls is reduced.
[0023]
The air warmed in the perimeter zone (2) then flows gently into the living area (15). Since the heating load is small in a highly airtight and highly insulated building, the room is sufficiently heated by the residual heat of the air after the air conditioning load in the perimeter zone (2) is processed. That is, this air conditioning apparatus performs the air conditioning of the living area (15) by the residual heat of the conditioned air after the air conditioning of the perimeter zone (2).
[0024]
As described above, according to the present air conditioner, warm air parallel to the window or the wall surface can be blown out to the perimeter zone (2) only by the indoor unit (1) installed on the indoor floor. With an inexpensive configuration, comfortable air conditioning without a draft feeling can be performed. In addition, the entire apparatus can be configured in a small size and can be easily installed in an existing building. Moreover, manufacturing cost and installation cost can be reduced. Since there is no need to form a separate air outlet or air inlet at the window or wall, the interior of the window or wall can be improved.
[0025]
Since the warm air (30) is blown out at a low wind speed, the draft feeling can be reduced. Moreover, scattering of dust in the room can be suppressed. Furthermore, since the warm air (30) is blown not only upward but also in the left-right direction, the temperature difference in the vertical direction in the room is reduced, and comfort can be improved.
[0026]
Since the turbo fans (5) and (6) are installed vertically, the indoor unit (1) can be thinned.
In addition, the turbofan (5), (6) is installed vertically, and a plurality of guide blades (31), (31), (31), (26) curved in the direction opposite to the curved direction of the fan blades (23), (26). 32) is provided with wind direction guides (7) and (8), so that the air flow blown out from the turbofans (5) and (6) can be efficiently converted into radial directions, and conditioned air can be It becomes easy to blow out in a planar shape and an arc shape parallel to the surface or the wall surface.
[0027]
Conventionally, so-called radiator type indoor units of natural convection type were often used in cold regions, but according to this indoor unit (1), it is possible to achieve the same miniaturization as radiator type indoor units. it can. In addition, since the indoor unit (1) performs forced convection air conditioning, it has excellent warmth. This indoor unit (1) is a floor-mounted unit, similar to a radiator-type indoor unit, so it can be easily replaced with a radiator-type indoor unit. Becomes easy.
[0028]
-Modification-
As shown in FIG. 6, the number of turbofans is not limited to two, but may be one. In this case, the wind direction guide (7) is composed of a plurality of guide vanes (31) arranged so as to cover the left and right sides and the upper side of the impeller (21).
[0029]
【The invention's effect】
As described above, according to the present invention, the conditioned air is not blown forward, but is supplied in a plane shape that is parallel to the window surface or wall surface and spreads in both the upper and left and right directions. In addition, a hot or cold zone can be easily formed. Therefore, the conditioned air blown in parallel with the window surface or the wall surface can prevent the cool air or the warm air near the window or the wall from entering the living area, thereby improving the comfort in the room. Since the conditioned air is blown not only upward but also in the left-right direction, the temperature difference in the vertical direction in the room is reduced, and comfort can be further improved. In addition, since it is not necessary to form a separate air outlet or air inlet at the window or wall, the apparatus can be configured compactly and can be easily installed in an existing building.
[0030]
By installing the turbofan vertically in the casing, the unit can be thinned.
[0031]
By providing a wind direction guide around the turbo fan that is arranged with a plurality of guide vanes curved in the direction opposite to the direction of the fan blades, the air flow blown from the turbo fan can be efficiently converted into a radial shape. This makes it easy to supply conditioned air in a plane parallel to the window surface or wall surface.
[0032]
By providing the first and second turbofans disposed on the left and right and the first and second wind direction guides disposed so as to cover the first and second turbofans, A configuration can be obtained.
[0033]
By blowing the conditioned air from the air outlet at a wind speed of 2 m / s or less, the occupant can be prevented from being directly exposed to the airflow, and the draft feeling can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of an indoor unit.
FIG. 2 is a diagram showing the flow of air.
3 is a cross-sectional view taken along line XX of FIG.
4 is a cross-sectional view taken along line YY in FIG.
FIG. 5 is an explanatory diagram of air flow in a turbo fan and a wind direction guide.
FIG. 6 is a view corresponding to FIG. 3 showing a modification of the embodiment.
[Explanation of symbols]
(1) Indoor unit
(2) Perimeter zone
(3) Casing
(4) Heat exchanger
(5), (6) Turbo fan
(7), (8) Wind direction guide
(11) Air inlet
(12) Upper air outlet
(13) Left air outlet
(14) Right air outlet
(15) Living area
(23), (26) Blade
(30) Hot air
(31), (32) Guide vane

Claims (3)

An air conditioner that is installed on the floor or near the floor near the window or near the floor and supplies the conditioned air (30) in a plane that is parallel to the window or wall and extends upward and laterally,
It is placed on the floor of the window or the wall in parallel with the window or wall, air inlets (11) are formed on the front facing the room, and air outlets (12, 13, 14) on the left and right sides and the upper surface. A casing (3) formed with,
A heat exchanger (4) provided behind the air suction port (11) in the casing (3), and
A turbo fan (5, 6) provided behind the heat exchanger (4) in the casing (3) so that the rotation shaft extends in the horizontal direction;
A plurality of guide vanes (31, 32) curved in the direction opposite to the curved direction of the blades (23, 26) of the turbo fan (5, 6) cover the left and right and upper periphery of the turbo fan (5, 6). Thus, the air conditioner provided with the turbo fan (5, 6) and the wind direction guide (7, 8) arranged concentrically. The turbo fan consists of first and second turbo fans (5, 6) arranged on the left and right sides.
The air conditioner according to claim 1 , wherein the wind direction guide includes first and second wind direction guides (7, 8) disposed so as to cover the first and second turbofans (5, 6). . The air conditioning apparatus according to any one of claims 1 to 2 , wherein the conditioned air (30) is blown out from the air outlet (12, 13, 14) at a wind speed of 2 m / s or less.

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