WO2001035030A1

WO2001035030A1 - Ceiling-embedded type air conditioner

Info

Publication number: WO2001035030A1
Application number: PCT/JP2000/005734
Authority: WO
Inventors: Junichi Nakanishi; Makio Takeuchi; Mitsuhiko Yamamoto; Yasuyuki Aisaka
Original assignee: Daikin Industries, Ltd.
Priority date: 1999-11-05
Filing date: 2000-08-25
Publication date: 2001-05-17
Also published as: CN1295223A; AU6730100A; JP2001193960A; CN1153027C; CN2442166Y; JP3285023B2

Abstract

A ceiling-embedded type air conditioner, wherein an air inlet (15) and an air outlet (16) opening during cooling or heating operation are provided in a decorative panel (14) at the bottom of the air conditioner (1) facing an indoor space, a horizontal vane (18) is provided capable of guiding the supply direction of the conditioned air from the air outlet (16) to approx. 45° or less relative to the lower surface of a ceiling board (70) by vertically changing the air supply direction, a spacer member (72) is provided between the decorative panel (14) and the ceiling board (70) to separate the upper edge part of the air outlet (16) 45 mm or longer downward from the ceiling board (70), an outer inclined surface (14a) is formed from the upper edge part of the air outlet (16) in the decorative panel (14) toward the outer peripheral side of the casing (10) at an inclination angle υ of 10° or more, so as to approach the lower surface of the ceiling board (70), and the upper edge part of the air outlet (16) is separated 75 mm or longer from the boundary position between the air conditioner (1) and the ceiling board (70)

Description

Description In-ceiling type air conditioner Technical field

The present invention relates to an arrangement structure of an air outlet of a ceiling-embedded air conditioner, and in particular, adjusts a blowing direction of conditioned air during a cooling operation or the like so that particulate dust contained in the conditioned air is removed from the ceiling. It belongs to the field of antifouling technology for preventing adhesion to surfaces. Background art

2. Description of the Related Art Conventionally, horizontal blades capable of changing the blowing direction of conditioned air upward and downward have been provided at the outlet of an air conditioner of a recessed ceiling type. The airflow direction of the conditioned air is directed downward during the heating operation by the horizontal blades, while the airflow direction is directed upward so as to be nearly parallel to the ceiling surface during the cooling operation (so-called horizontal blowing). In each operation state, the temperature distribution in the room is made uniform to improve the air conditioning efficiency.

However, in the horizontal blowing state, fine particulate dust contained in the air-conditioned air that is blown may adhere to the ceiling surface, and the ceiling surface may be partially contaminated. Specifically, as shown in Fig. 9, when the air conditioner is viewed from the horizontal direction, the airflow blown out from the outlet (a) in the horizontal blowout state becomes substantially V-shaped when viewed along the flow, Since the initial velocity of air blowing is high in the central part in the longitudinal direction of the outlet (a), the airflow flows in a region away from the ceiling surface (b). Further, since the particulate dust contained in the blown air has a high inertial force, the dust hardly adheres to the ceiling surface (b).

On the other hand, the airflow spreads laterally or becomes vortex at both sides in the longitudinal direction of the air outlet (a), and the initial velocity of the airflow is lower than that of the central part. It flows along (b). Moreover, the dust contained in the blown air has a low inertia force and easily adheres to the ceiling surface (b), so that the area (D) of the ceiling surface (b) which is close to both sides of the air outlet (a). (See Fig. 2), dust in the air adheres to it, making it easier to get dirty. In order to avoid such contamination, Japanese Patent Application Laid-Open No. HEI 3-1602666 discloses that a horizontal blade is provided with a detachable auxiliary fin for shifting a blowing direction to a ceiling surface side. It has been proposed to attach and detach the fins depending on the degree of ceiling dirt. That is, for example, in an environment where indoor air is very dusty and ceiling dirt is likely to occur, or in places such as hospitals where there is a particularly high need for dirt prevention, remove the auxiliary fins and turn the horizontal blades downward, In environments where ceiling dirt is unlikely to occur or where there is little need for dirt prevention, auxiliary fins are installed to enable horizontal blowing. Solution 1

However, even if the auxiliary fins are provided as in the conventional example, the auxiliary fins must be removed in an environment where ceiling dirt is likely to be generated, and eventually, at this time, the conditioned air always blows downward from the air outlet. Because of this, not only does air-conditioning efficiency decrease during cooling operation, which should normally perform horizontal blowing, but also the sense of discomfort (so-called “draft feeling”) due to the direct blow of cold air to people indoors. Problems arise.

The present invention has been made in view of such a point, and an object of the present invention is to devise the arrangement of air-conditioning air outlets and the like so that an appropriate air conditioner operating condition can be attained. The purpose is to prevent dirt on the ceiling surface while obtaining the blowing direction. Disclosure of the invention

The present invention employs the following means to solve the above problems.

According to a first aspect of the present invention, an air outlet (16) which is embedded in a ceiling surface (70) and blows out conditioned air toward an indoor space is provided, and the air outlet direction of the conditioned air is supplied to the air outlet (16). Assuming that the ceiling-embedded type air conditioner is provided with a guide means (18) capable of guiding, in this case, the air outlet forming member on the side where the blowing direction is guided by the guide means (18) is described. The lower part was placed at least 45 mm below the ceiling surface (70). As the guide means (18), for example, the air passage on the upstream side to the outlet (16) may be curved to guide the direction of the conditioned air to be blown. Also, the lowermost part of the outlet forming member, Preferably, it is 45 mm away from the ceiling surface (70) (second invention).

According to the present invention, the air-conditioned air blown out from the air outlet (16) of the air conditioner (1) during a cooling operation or the like is guided by the guide means (18) to become a jet blown into the indoor space. Is bent in the direction of the ceiling surface (70) by the Coanda effect. However, since the lowermost part of the outlet forming member on the side where the blowing direction is guided by the guide means (18) is separated from the ceiling surface (70) by 45 mm or more, even if the air has a general blowing speed, For example, even if the air flows at both sides in the longitudinal direction of the outlet (16), which has a relatively low initial velocity, the air flow does not reach the ceiling surface (70), and eventually the temperature of the air with the room air rises. It starts to fall by the difference.

This prevents the airflow from flowing along the ceiling surface even when the air-conditioning air blowing direction is set to be nearly parallel to the ceiling surface. Can be prevented. In a third aspect based on the first aspect, the air conditioner main body (10) includes a panel member (14) fixed to a ceiling surface and provided with an air outlet (16) so as to face an indoor space. And a spacer member (72) for adjusting the vertical distance between the panel member (14) and the ceiling surface (70).

According to the present invention, in a situation where there is a high demand for the prevention of dirt on the ceiling, the distance between the panel member (14) and the ceiling surface (70) is adjusted by the spacer member (72) so that the air outlet ( By adjusting the distance between 16) and the ceiling surface (70), the lowermost part of the air outlet forming member on the side where the direction of air-conditioning air is guided is securely separated from the ceiling surface (70) by 45mm or more. It can be set as follows. On the other hand, if the requirement for dirt prevention is low, it is possible to install the same air conditioner (1) without a spacer member (72). In this case, the air conditioner (1) and the ceiling ( 70) to enhance the sense of unity and improve the appearance. In a fourth aspect of the present invention, in the first aspect, the air conditioning apparatus main body (10) is provided from the end of the air outlet (16) to the air outlet forming member on the side where the blowing direction is envisaged by the guide means (18). Outside of) An outer inclined surface (14a) is formed so as to be inclined toward the peripheral surface so as to approach the ceiling surface, and an inclination angle of the outer inclined surface (14a) with respect to the ceiling surface at least near the edge of the outlet (16). Was set to 10 degrees or more. The inclination angle is preferably set to 10.8 degrees (eighth invention).

According to the present invention, the Coanda effect between the flow of the conditioned air blown out from the outlet (16) and the outer inclined surface (14a) of the outlet forming member is reduced, and the operation and effect of the first aspect of the present invention are reduced. Can be increased. In a fifth aspect of the present invention, in the first aspect, the outlet port forming member on the side where the blowing direction is guided by the boundary position between the air conditioner body (10) and the ceiling surface (70) and the guide means (18). The inclination angle of the line connecting the bottom with the ceiling surface (70) was set to 10 degrees or more. The inclination angle is preferably set to 10.8 degrees (the tenth invention).

According to this invention, the Coanda effect between the flow of the conditioned air blown out from the air outlet (16) and the surface of the air outlet forming member is weakened, and the same effect as the third invention can be obtained. Can be. In a sixth aspect based on the first aspect, the ceiling extends from the lowermost portion of the air outlet forming member on the side where the blowing direction is envisaged by the guide means (18) toward the outer peripheral side of the air conditioner body (10). A first inclined surface (14a) inclined to approach the surface, a second inclined surface following the first inclined surface (14a), and a ceiling surface (70) of the first inclined surface (14a). And the inclination angle of the second inclined surface with respect to the ceiling surface (70) is greater than 12 degrees.

According to the present invention, part of the conditioned air blown out from the outlet (16) flows along the first inclined surface (14a), and the air-conditioning air flows between the first inclined surface (14a) and the second inclined surface. It comes off at the boundary position, whereby the operation and effect of the first invention can be enhanced. The seventh invention is embedded in the ceiling surface (70) and blows out conditioned air toward the indoor space. It is assumed that the air conditioner is a ceiling-embedded type air conditioner provided with an air outlet (16) and a guide means (18) capable of guiding the direction of air-conditioned air to the air outlet (16). The outlet forming member on the side where the blowing direction is guided by the guide means (18) has a ceiling surface extending from the edge of the outlet (16) toward the outer peripheral side of the air conditioner body (10). An external inclined surface (14a) is formed so as to be inclined so as to approach the ceiling, and the inclination angle of the external inclined surface (14a) with respect to the ceiling surface at least near the edge of the outlet (16) is set to 10 degrees or more. . The inclination angle is preferably set to 10.8 degrees (eighth invention).

According to the present invention, the air-conditioned air blown out from the air outlet (16) of the air conditioner (1) during a cooling operation or the like is guided by the guide means (18) to become a jet blown into the indoor space. Is first bent upward by the Coanda effect between the outer slope surface (14a) of the outlet forming member. However, since the angle of inclination of the outer inclined surface (14a) at least near the edge of the outlet (16) is as large as 10 degrees or more with respect to the ceiling surface (70), the Coanda effect is reduced, and the airflow is reduced. It becomes difficult to reach the ceiling surface (70). As a result, even when the air-conditioning air blowing direction is directed upward, the blowing air flow can be suppressed from flowing along the ceiling surface (70), and thus, the dirt on the ceiling surface in a so-called horizontal blowing state can be significantly reduced. Can be reduced. According to a ninth aspect of the present invention, an air outlet (16) is provided which is embedded in a ceiling surface (70) and blows conditioned air toward an indoor space, It is assumed that the ceiling-mounted air conditioner is provided with a guiding means (18) capable of guiding. Then, the ceiling surface of the line connecting the boundary position between the air conditioner body (10) and the ceiling surface (70) and the lowermost part of the outlet forming member on the side where the blowing direction is envisaged by the guide means (18) ( The inclination angle with respect to 70) was set to 10 degrees or more. Note that the inclination angle is preferably set to 10.8 degrees (the tenth invention).

According to this invention, the Coanda effect between the flow of the conditioned air blown out from the air outlet (16) and the lower surface of the air outlet forming member is reduced, and the same operation and effect as the seventh invention can be obtained. Can be. According to the eleventh invention, an air outlet (16) is provided which is embedded in a ceiling surface (70) and blows out conditioned air toward an indoor space, and a direction in which the conditioned air is blown into the air outlet (16). It is assumed that the ceiling-mounted air conditioner is provided with a guide means (18) that can be provided. The first slope is inclined from the lowermost part of the air outlet forming member on the side where the blowing direction is guided by the guide means (18) toward the outer peripheral side of the air conditioner body (10) toward the ceiling surface. Surface (14a) and a second inclined surface following the first inclined surface (14a), and the inclination angle of the first inclined surface (14a) with respect to the ceiling surface (70) is set to 12 degrees or less. In addition, the inclination angle of the second inclined surface with respect to the ceiling surface (70) is more than 12 degrees.

According to the present invention, the conditioned air blown out from the air outlet (16) of the air conditioner (1) during a cooling operation or the like is guided by the guide means (18) to become a jet blown into the indoor space. A part of the air flows along the first inclined surface (14a) and separates at a boundary position between the first inclined surface (14a) and the second inclined surface. As a result, the airflow hardly reaches the ceiling surface (70), so that the dirt on the ceiling surface in a so-called horizontal blowing state can be greatly reduced. In a twelfth invention, in any one of the sixth and eleventh inventions, the distance from the lowermost part of the outlet forming member to the boundary position between the first inclined surface (Ha) and the second inclined surface is 70 m. m or more.

According to the present invention, the function and effect of the sixth or eleventh invention can be sufficiently obtained. According to a thirteenth invention, in any one of the fourth, fifth, sixth, seventh, ninth and eleventh inventions, the air outlet forming member on the side where the blowing direction is guided by the guiding means (18) is provided. The lowermost part was placed so as to be at least 75 mm horizontally apart from the boundary between the air conditioner body (10) and the ceiling surface (70). It is preferable that the lowermost part of the outlet forming member is horizontally 79 mm apart from a boundary position between the air conditioner main body (10) and the ceiling surface (70) (a fourteenth invention).

According to the present invention, a part of the conditioned air blown out from the outlet (16) is bent upward by the Coanda effect and flows along the outlet forming member. Since the lowermost part of the mouth forming member is sufficiently separated in the horizontal direction from the boundary position with the ceiling surface (70), most of the airflow flowing along the outlet forming member as described above is large. , Before descending, which can greatly reduce the dirt on the ceiling surface (70). According to a fifteenth aspect of the present invention, an air outlet (16) which is embedded in a ceiling surface (70) and blows out conditioned air toward an indoor space is provided, and It is assumed that the ceiling-mounted air conditioner is provided with a guide means (18) that can be provided. In this apparatus, the outlet forming member on the side where the blowing direction is guided by the guide means (18) is provided. The lowermost part of the air conditioner was placed horizontally at least 75 mm away from the boundary between the air conditioner body (10) and the ceiling surface (70). It is preferable that the lowermost part of the outlet forming member is horizontally separated from the boundary between the air conditioner main body (10) and the ceiling surface (70) by 79 mm in the horizontal direction (the sixteenth invention).

According to the present invention, the air-conditioning air blown out from the air outlet (16) of the air conditioner (1) during a cooling operation or the like is guided by the guide means (18) to become a jet to be blown into the indoor space. Is bent upward by the Coanda effect between the air outlet forming member and a part of the airflow flows along the air outlet forming member. However, since the lowermost part of the outlet forming member is sufficiently separated from the boundary position with the ceiling surface (70) in the horizontal direction by 75 mm or more, the air flowing along the outlet forming member as described above. The flow rarely reaches the ceiling surface (70), and this air flow eventually falls due to the temperature difference with the room air. Therefore, the blown air flow is prevented from flowing along the ceiling surface (70), and the dirt on the ceiling surface in a so-called horizontal blowing state can be greatly reduced.

As described above, a part of the airflow blown out from the outlet (16) flows along the outlet forming member, so that dust contained in the airflow adheres to the outlet forming member, and It is conceivable that the outlet forming member is contaminated, but in this regard, for example, the surface of the outlet forming member is processed so as to be hardly soiled, or the surface of the outlet forming member is easily removed from the surface. It can respond effectively by processing it into a state. In the seventeenth invention, the air outlet (16) according to any one of the first, seventh, ninth, eleventh and fifteenth inventions has a structure in which the flow of air-conditioned air in the longitudinal direction of the air outlet (16) is provided. A rectifying member (19) that regulates the air pressure is provided.

According to the present invention, the conditioned air blown out from the outlet (16) is rectified so that the flow in the longitudinal direction of the outlet (16) is regulated by the rectifying member (19) and heads in the blowing direction. Therefore, the initial velocity of the blow-out increases at both sides of the blow-out opening (16) as well as at the central portion, whereby the upward flow of the conditioned air in the horizontal blow-out state can be more effectively suppressed. The rectifying member (19) may be arranged at least at substantially both ends in the longitudinal direction of the outlet (16). In the eighteenth invention, the guide means (18) in any one of the first, seventh, ninth, eleventh and fifteenth inventions is provided with a horizontal blade capable of changing a blowing direction of conditioned air up and down. I do.

According to the present invention, the flow of the conditioned air from the outlet (16) can be changed up and down by the horizontal blades (18), so that the flow of the blown air is relatively downward during the heating operation. On the other hand, during the cooling operation, the air is efficiently discharged in each operation state by setting the air to the horizontal blowing state. In particular, during the cooling operation, if the air flow is made as horizontal as possible by the horizontal blades (18) within a range in which the flow of the blown air does not flow along the ceiling surface (70), the above-mentioned effect is obtained. Can get enough. In the nineteenth invention, a rectifying plate (19) for restricting the flow of the conditioned air in the longitudinal direction of the air outlet (16) is provided on the horizontal blade (18) in the eighteenth invention.

According to the present invention, the flow of the blown air is effectively regulated by the flow straightening plate (19) on the horizontal blade (18), and the initial speed of the blown air flow is the same at both sides of the outlet (16) as in the central portion. Therefore, it is possible to more effectively suppress the upward flow of the conditioned air in the horizontal blowing state. The rectifying member (19) may be arranged so as to correspond to at least substantially both ends in the longitudinal direction of the outlet (16) on the horizontal blade (18). In the twenty-first invention, the horizontal blade (18) according to the nineteenth invention is formed of an elongated plate member that is curved in the width direction, and the rectifying plate (19) includes the horizontal blade (18). They were arranged at predetermined intervals over the entire surface in the longitudinal direction on the inwardly curved surface of 18).

According to the 20th aspect, the flow of the conditioned air can be smoothly changed by the long horizontal blades (18) curved in the width direction to change the blowing direction. In addition, by arranging the flow straightening plates over the entire curved inner surface in the longitudinal direction, the flow of the blown air can be entirely flow-rectified by those flow straightening plates. In the twenty-first aspect, in any one of the first, seventh, nineteenth, eleventh and fifteenth aspects, the initial velocity of the air flow near the center of the outlet (16) is approximately 2 m. / Sec or more and approximately 6 m / sec or less.

According to the present invention, it is possible to sufficiently suppress the airflow from flowing upward even in the horizontal blowing state without increasing the blowing noise. In the second invention, in any one of the first, seventh, ninth, eleventh and fifteenth inventions, the running distance of the conditioned air reaching the air outlet (16) is 30 mm or more. .

According to the present invention, the flow of the conditioned air blown out from the outlet (16) is adjusted so as to be generally directed in the blowing direction, so that the speed of the blown air on both sides of the outlet (16) is particularly reduced. It is possible to suppress that the air flow is directed upward even in the horizontal blowing state. In the twenty-third invention, in any one of the first, seventh, ninth, eleventh and fifteenth inventions, the air conditioner body (10 ) Was set so as to be separated from the boundary position between the air conditioner body (10) and the ceiling surface (70) by 90 mm or more.

According to this invention, the flow of the conditioned air blown out from the outlet (16) and the ceiling surface (70) In this case, the airflow can be suppressed from flowing upward even in the horizontal blowing state. BRIEF DESCRIPTION OF THE FIGURES

1, _c Figure 2 is a schematic cross-sectional view from the side of the air conditioning apparatus according to Embodiment 1 of the present invention is a perspective view from below of an air conditioner embedded in a ceiling.

FIG. 3 is an enlarged view showing a detailed configuration of the air outlet.

FIG. 4 is a diagram corresponding to FIG. 3 when the blowing direction of the conditioned air is downward.

FIG. 5 is a perspective view of the horizontal blade.

FIG. 6 is a diagram corresponding to FIG. 3 according to a modification in which a protruding plate is provided at the upper edge of the air outlet. FIG. 7 is a diagram corresponding to FIG. 3 according to the second embodiment.

FIG. 8 is a diagram corresponding to FIG. 5 according to the second embodiment.

FIG. 9 is an explanatory diagram showing a state of a blown airflow of conditioned air from an air outlet when the conventional air conditioner is viewed from the side. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1—

FIG. 1 is a longitudinal sectional view showing a configuration of an embodiment of an in-ceiling type air conditioner (1) according to the present invention. As shown in the figure, this air conditioner (1) has a casing (10) (air conditioner body) in which a fan (20) and a heat exchanger (30) are housed. It is embedded in the installation opening (71) and installed in the space above the ceiling.

The casing (10) is composed of a container-shaped main casing (11) that opens downward and a decorative panel (14) that covers the bottom opening of the main casing (11). No, but it is suspended and fixed to an upper beam by a hanging bracket. More specifically, the main body casing (11) includes a top plate (12) formed by cutting out four corners of a square and having an octagonal shape, and a side plate (13) extending downward from an outer edge portion of the top plate (12). Meanwhile, the decorative panel (1 4) has a substantially square plate shape, is attached to the lower end of the side plate (13), and has a peripheral portion fixed to a ceiling plate (70) via a spacer member (72) described later.

As shown in FIG. 2, an air inlet (15) is formed in a substantially central portion of the decorative panel (14) so as to open in a square shape, and four sides of the air inlet (15) are formed. Four elongated rectangular air outlets (16) are formed along the outside of each of the air outlets. The air suction port (15) is provided with an air filter (17) over its entire surface for removing suspended matters such as particulate dust contained in room air, and the air filter (17). The entire lower surface of (17) is supported by a lattice-shaped filter cover. On the other hand, the air outlet (16) is provided with horizontal blades (18) that can change the direction of air-conditioning air blow up and down. Has been established. In addition, the decorative panel (14) with the opening of the air outlet (16) forms an outlet forming member as shown in FIG.

Specifically, as shown in FIGS. 3 and 4 in an enlarged manner, the side wall on the outer peripheral side (right side in the figure) of the air passage communicating with the air outlet (16) of the decorative panel (14) is substantially vertically downward. A vertical surface (16a) extending downwardly, and an inclined surface (16b) inclined downward from the lower end of the vertical surface (16a) toward the outer periphery of the panel and connected to the lower surface of the decorative panel (14). On the other hand, a side wall on the inner peripheral side of the panel (left side in the drawing) of the air passage communicating with the air outlet (16) has a curved surface (16c) projecting downward to the outer peripheral side of the panel, and a curved surface (16c). It consists of a vertical plane (16d) extending substantially vertically downward from the lower end of 16c). The two opposing walls having such a shape are formed over the entire length in the longitudinal direction (the direction perpendicular to the paper surface) of the air outlet (16), and the air passage sandwiched between both walls is formed. Has a function of a runway that adjusts the flow of the conditioned air toward the outlet (16) and changes the direction of the flow. The approach distance of the conditioned air reaching the outlet (16) in this approach path is set to be about 30 mm or more.

The horizontal blade (18) is a long plate member as shown in FIG. 5, is slightly curved in the width direction, and is attached to the air outlet (16). The support shaft X is rotatable about a support shaft X along the base end edge on the back side (upstream of the flow of air-conditioned air) of the outlet 16, and the support shaft is driven by a motor (not shown). It turns around X as the turning center. When the conditioned air is blown out in the lowest direction, As shown in FIG. 3, when the rear surface (8b) of the horizontal blade (18) is turned downward so as to overlap with the vertical surface (16d) on the inner peripheral side of the panel, The horizontal blade (18) is turned upward so that its front surface (18b) is substantially parallel to the inclined portion (16b) of the outer peripheral side wall surface of the panel.

The fan (20) is a so-called turbo fan provided at a substantially central position inside the main body casing (11) and having a blade (23) held between a shroud (21) and a hub (22). The drive shaft (26) of a fan motor (25) attached to the top plate (12) of the main body casing (11) is inserted and fixed to the hub (22) of the fan (20). The fan (20) is driven to rotate by the driving force of the night (25), so that air sucked in from below the fan (20) is sent radially outward. A bell mouth (27) is provided below the fan (20) to guide the air flowing into the casing (10) from the air suction port (15) to the fan (20).

Further, the heat exchanger (30) is a so-called cross made up of a number of plate-like fins (31) provided in parallel with each other and a heat transfer tube (32) provided through the fins (31). Fin heat exchanger. The heat exchanger (30) is formed in a rectangular tubular shape in plan view so as to surround the fan (20), and is connected to an outdoor unit via a refrigerant pipe (not shown). It functions as an evaporator and as a coagulator during the heating operation, and regulates the temperature of the air sent from the fan (20). A drain pan (33) for receiving drain water is provided below the heat exchanger (30).

In other words, the air filter (17), bellmouth (27), fan (20), and heat exchanger are located in the body casing (11) of the air conditioner (1) through the air inlet (15) of the decorative panel (14). An air flow passage (W) is formed through the vessel (30) to the air outlet (16). When the fan (20) is driven during the air conditioning operation, the room air taken into the casing (10) from the air suction port (15) via the air filter (17) is supplied to the bell mouth (27) and the fan. (20) and the heat exchanger (30) in this order in the air flow passage (W) to exchange heat with the refrigerant in the heat exchanger (30) to control the temperature (for cooling operation). Is cooled and heated in the heating operation), and then blown out as air-conditioned air from the air outlet (16) into the indoor space so that air conditioning of the indoor space is performed. Has become. The main characteristic part of the first embodiment is that a spacer member (72) for adjusting the vertical space between the decorative panel (14) and the ceiling panel (70) of the air conditioner (1) is provided between the decorative panel (14) and the ceiling panel (70). As a result, as shown in FIG. 3, the upper edge of the air outlet (16) in the decorative panel (14), that is, the horizontal blade (18), allows the air-conditioning air to blow out. A vertical distance h between the lowermost part of the outlet forming member on the guided side and the lower surface of the ceiling plate (70) is set to 45 mm or more (preferably 45 mm), and the air outlet is provided. (16) The distance between the upper edge of the decorative panel (14) and the outer edge of the decorative panel (14) (the boundary position between the decorative panel (14) and the ceiling panel (70)) is set to 90 mm or more.

In other words, in this embodiment, the position where the airflow blown out from the air outlet (16) finally separates from the decorative panel (14) is at least 45 mm below the lower surface of the ceiling plate (70). And the distance L from that position to the boundary between the decorative panel (14) and the ceiling panel (70) is 9 Omm or more, so that during the cooling operation, the so-called horizontal blowing from the air outlet (16) is performed. The conditioned air blown out in the state can be prevented from flowing along the lower surface of the ceiling plate (70). That is, when there is a request to blow the conditioned air relatively downward, such as during a heating operation, the horizontal blades (18) are directed substantially vertically downward as shown in FIG. Along the horizontal vane (18) and the vertical surface (16a) on the outer peripheral side of the panel of the air outlet (16), the air is blown substantially vertically downward as indicated by the arrow S in the figure.

On the other hand, when a so-called horizontal blowing state is set during a cooling operation or the like, as shown in FIG. 3, the horizontal blade (18) is turned upward to blow the front surface (18a) of the horizontal blade (18). The exit (16) should be substantially parallel to the inclined surface (16b) of the outer peripheral side wall of the panel. In this way, the conditioned air flows along the side wall of the air passage (runway) communicating with the air outlet (16), along the curved surface (6c) and along the front surface (18a) of the horizontal blade (18). The flow is curved and the direction of the streamline changes greatly and smoothly. As shown by the arrow S in the figure, the inclined surface (16b) on the outer peripheral side of the panel of the air outlet (16) and the horizontal blade ( 18), and blow from the air outlet (16) at an angle almost parallel to the lower surface of the ceiling plate (70) (for example, the angle between the lower surface of the ceiling plate (70) and the lower surface is approximately 30 ° to 35 °). Will be issued.

At this time, the conditioned air blown into the indoor space from the air outlet (16) becomes a jet, and when the blow angle is nearly parallel to the lower surface of the ceiling plate (70), the jet axis is bent upward by the Coanda effect. However, in this embodiment, since the air outlet (16) is appropriately spaced from the ceiling plate (70) as described above, the air flow near the center of the air outlet (16) is reduced. If the initial velocity of the air outlet is a general value of, for example, about 2 to 6 m / s, the flow of the air-conditioned air including the flow on both sides of the outlet (16) with a relatively low initial velocity Does not rise to the lower surface of the ceiling plate (70), but eventually falls due to the temperature difference with room air.

That is, in the air conditioner of the ceiling-embedded type, in the area where the air blowing speed is low, the airflow tends to approach the lower surface of the ceiling plate (70) due to the Coanda effect, and the horizontal blade (18) during cooling operation. If the direction of the air-conditioning air blow is relatively upward and it is, for example, about 40-45 ° with respect to the lower surface of the ceiling plate (70), the air flow will flow along the lower surface of the ceiling plate (70), and the phantom line in Fig. 2 Although the ceiling dirt was generated in the area (D) as shown by, according to the air conditioner (1) according to this embodiment, the air outlet Even if the direction of air-conditioning air blowing from the mouth (16) is brought close to the lower surface of the ceiling plate (70) by, for example, about 30 to 35 ° by the horizontal blades (18), the air flow along the lower surface of the ceiling plate (70) Flow is almost eliminated, which reduces Can be prevented from occurring.

—Table 11

Here, Table 1 shows that four types of air conditioners (evenings 1 to 4) having different dimensions and shapes of the air outlets (16) are each interposed by a spacer member (72) as in this embodiment. And adjusting the arrangement of the air outlet (16) to the ceiling plate (70), This shows the result of examining the state of occurrence of ceiling dirt after actually operating for a predetermined time in comparison with the case where the apparatus is attached to the ceiling plate (70) without using (72). According to the experimental results, the minimum blowing angle at which ceiling dirt does not occur is reduced by 5 to 10 ° by using the spacer member (72) regardless of the size and shape of the air outlet (16). I know what I can do o

Therefore, according to the air conditioner (1) of this embodiment, the spacer member (72) is provided between the decorative panel (14) and the ceiling plate (70), and the air outlet (16) is provided. By placing the air conditioner at an appropriate distance from the ceiling plate (70), the airflow direction of the air-conditioning air can be maintained at a conventional level while preventing the ceiling from being stained, especially during cooling operation that requires horizontal air-conditioning air blowing. As a result, the air conditioner can be moved closer to the horizontal direction, so that the air conditioning efficiency can be ensured and the sense of inconsistency (draft feeling) for indoor occupants can be eliminated.

In addition, if there is a low requirement to prevent ceiling dirt, the same air conditioner (1) can be installed without the spacer member (72), which allows the air conditioner (1) to be connected to the ceiling. It can be installed to enhance the sense of unity and improve the appearance. One modification

FIG. 6 shows a modification of the first embodiment. In this modification, the decorative panel (14) is provided with a projecting plate (16e) extending obliquely downward from the upper edge of the air outlet (16). . In this case, the lowermost part of the outlet forming member on the side where the direction of air-conditioned air is guided by the horizontal blades (18) is not the upper edge of the air outlet (16) but the protruding plate (16e). ). Therefore, the distance h from the position of the tip of the protruding plate (16e) to the lower surface of the ceiling plate (70) is 45 mm or more, and the boundary between the decorative panel (14) and the ceiling plate (70) from the position of the tip. When the distance L to the position is set to 9 Omm or more, the same operation and effect as in the first embodiment can be obtained.

—Embodiment 2—

FIG. 7 shows a second embodiment of the ceiling-mounted air conditioner (1) according to the present invention. The air conditioner (1) according to the second embodiment is the same as that of the first embodiment except for a detailed configuration such as an air outlet (16). Hereinafter, the same members are denoted by the same reference numerals. And a detailed explanation is omitted. The main characteristic part of the second embodiment is that a spacer member (72) is provided between the decorative panel (14) of the air conditioner (1) and the ceiling plate (70), as in the first embodiment. In addition to arranging the upper edge of the air outlet (16) at an appropriate distance from the lower surface of the ceiling plate (70), the airflow blown out of the air outlet (16) is not as upward as possible In addition, even if a part of the airflow flows upward, the outer surface of the ceiling plate (70) is not stained by dust contained in the air, so that the outer surface of the ceiling plate (70) is not stained. This is in setting the dimensions and shape of the panel (14).

More specifically, on the outer side of the air outlet (16) of the decorative panel (14), that is, on the side where the direction of air-conditioning air is blown out by the horizontal blades (18), the upper edge of the air outlet (16) is provided. A substantially planar outer inclined surface (14a) is provided which is inclined from the portion toward the outer peripheral side of the air conditioner casing (10) so as to approach the lower surface of the ceiling plate (70). The angle of inclination 6> with respect to the ceiling surface is set to 10 ° or more (preferably 10.8 °). As a result, the air flow (jet flow) blown out from the air outlet (16) during cooling operation or the like is first bent upward by the Coanda effect between the externally inclined surface (14a) of the decorative panel (14). However, by setting the inclined state of the outer inclined surface (14a), the Coanda effect can be reduced and the upward flow of the conditioned air can be reduced.

The vertical interval h between the upper edge of the air outlet (16) and the lower surface of the ceiling plate (70) is set to 45 mm or more as in the first embodiment. 16) The upper edge is disposed sufficiently horizontally in the horizontal direction from the outer peripheral end of the spacer member (72). In other words, the upper edge of the air outlet (16) and the air conditioner (1) And the horizontal distance A from the boundary position of the ceiling plate (70) is set to 75 mm or more (preferably 79 mm). As a result, even if a part of the conditioned air blown out from the air outlet (16) flows upward and then flows along the outer inclined surface (14a) of the decorative panel (14), the air outlet ( 16) Since the upper edge of the ceiling panel (70) is sufficiently far from the boundary with the ceiling panel (70) in the horizontal direction, most of the airflow flowing along the decorative panel (14) reaches the bottom of the ceiling panel (70). To descend before reaching become.

In addition, in the second embodiment, in place of the horizontal blade (18) of the first embodiment, for example, a horizontal blade (18) having a current plate (19, 19,...) As shown in FIG. Used. The horizontal blade (18) is composed of a long plate member slightly curved in the width direction, the curved inner surface (18a) is the front surface, and the outer surface (18b) is the outer surface (18b). The back has been. Further, shell-like projections (18c, 18c) protruding toward the front side are integrally provided at both ends in the longitudinal direction of the horizontal blade (18), and the horizontal blades (18c) are respectively provided at ends of the respective projections (18c). The connection pins (18d, 18d) are formed to extend outward along the longitudinal direction of (18). The horizontal blades (18) are arranged at the air outlets (16) as shown in FIG. 7, and are located at the inner side of the air outlets (16) (upstream of the flow of the conditioned air: The two connecting pins (18d, l8d) located on the left side of the figure are rotatably connected and supported by a connecting member (14b) on the decorative cover (14) side, whereby the horizontal blade (18) Is rotated up and down around the support shaft X by the drive of a motor (not shown).

On the front surface (18a) curved inside the horizontal blade (18), a predetermined interval is provided between the horizontal blade (18) over the entire longitudinal direction of the horizontal blade (18) to rectify the flow of conditioned air. A plurality of rectifying plates (19, 19, ...: 10 in the example in the figure) are fixedly arranged. Each of the rectifying plates (19) is disposed across the width direction of the horizontal blade (18) so as to be substantially orthogonal to the front surface (18a) of the horizontal blade (18). The conditioned air flowing along the front surface (18a) of the horizontal blade (18) is rectified over the entire longitudinal direction of the horizontal blade (18) while flowing between the respective rectifying plates (19). Since the air flow rectified by the flow straightening plates (19, 19, ...) becomes a two-dimensional flow generally along the vertical plane, the initial velocity of the conditioned air blown out from the air outlet (16) is However, both sides of the air outlet (16) are as high as the central part. Therefore, in the air conditioner (1) of the second embodiment, the upper edge of the air outlet (16) is fixed to the lower surface of the ceiling plate (70) by using the spacer member (72) as in the first embodiment. In addition to the air outlet (16) being placed at an appropriate distance in the vertical direction, the upper edge of the air outlet (16) is placed sufficiently far in the horizontal direction from the boundary with the ceiling plate (70). Outlet (16) connected to the upper edge The exterior inclined surface (14a) of the decorative panel (14) has a shape that is relatively inclined to the horizontal plane, so that the airflow blown out from the air outlet (16) can be achieved first when the conditioned air is blown horizontally. Is prevented from being bent upward, and a part of the airflow flowing upward along the decorative panel (14) can be lowered before reaching the lower surface of the ceiling plate (70), so that the airflow is included in the air. It is possible to more effectively prevent the ceiling surface from being contaminated by dust that is generated.

Also, in the second embodiment, the rectifying plates (19, 19,...) Are provided on the horizontal blades (18) to rectify the flow of the air-conditioned air. The decrease in the flow velocity of the blown air in the portion is almost eliminated, and the upward flow of the air is suppressed in this portion, so that the above-described operation and effect can be further enhanced. Another embodiment—

It should be noted that the present invention is not limited to the first and second embodiments, but includes other various embodiments. That is, in each of the above embodiments, a spacer member (72) is interposed between the decorative panel (14) and the ceiling plate (70) to adjust the position of the air outlet (16). However, the present invention is not limited to this, and the vertical size of the decorative panel (14) is increased in advance, and the air outlet (16) can be appropriately moved from the lower surface of the ceiling plate (70) without using the spacer member (72). It may be arranged away from the camera.

Further, in each of the above embodiments, the horizontal blade (18) is provided at the air outlet (16) to change the flow of the air-conditioning air up and down. However, the horizontal blade (18) is provided. Instead, the flow of the conditioned air may be guided only by the curved shape of the air passage leading to the air outlet (16). In this case, the air passage itself constitutes the guiding means.

Further, in the air conditioner (1) according to the first embodiment, the vertical interval h between the upper edge of the air outlet (16) and the lower surface of the ceiling plate (70) is specified. In addition to the air conditioner (1), the horizontal distance A from the upper edge of the air outlet (16) to the boundary with the ceiling plate (70) of the air conditioner casing (10) A Although the tilt angle 0 in (14a) is specified, the present invention is not limited to this. That is, for example, the horizontal distance A or the inclination By specifying only one of the angles 0, the occurrence of ceiling dirt can be significantly reduced as in the above embodiments. Alternatively, by specifying any one set of the vertical interval h and the horizontal distance A, the vertical interval h and the inclination angle θ, or the horizontal distance Α and the inclination angle 6 », as in the above-described embodiments, It becomes possible to almost prevent the generation of ceiling dirt.

In the air conditioner (1) according to the second embodiment, the inclination angle of the external inclined surface (14a) with respect to the lower surface of the ceiling plate (70) is set to 12 degrees or less, and the external inclined surface (14a) A second inclined surface may be formed, and an inclination angle of the second inclined surface with respect to the ceiling surface (70) may be greater than 12 degrees. In this case, a part of the conditioned air blown out from the air outlet (16) flows along the external inclined surface (14a) and separates at the boundary position with the second inclined surface. As a result, dirt on the ceiling surface can be greatly reduced.

In addition, in each of the above embodiments, the present invention is applied to a so-called ceiling-mounted four-way-blowing type air conditioner (1) which includes a evening fan and blows out conditioned air in four directions. However, the present invention can be applied to, for example, a so-called ceiling-mounted two-way blow-type air conditioner that includes a sirocco fan and blows out conditioned air in two directions. Industrial applicability

As described above, the ceiling-embedded air-conditioning apparatus according to the present invention can prevent the ceiling surface from being stained while obtaining an appropriate blowing direction according to the operation state. Particularly suitable for use in places where there is a high demand for prevention of dirt.

Claims

The scope of the claims

1. An outlet (16) that is embedded in the ceiling surface (70) and blows out conditioned air toward the indoor space is provided, and the direction of the conditioned air blowing can be guided to the outlet (16). In the ceiling-mounted air conditioner provided with the guide means (18),

The lowermost part of the outlet forming member on the side where the blowing direction is guided by the guide means (18) is arranged so as to be separated from the ceiling surface (70) by 45 mm or more downward.

An air conditioner embedded in a ceiling, characterized in that:

2. In claim 1,

The lowermost part of the outlet forming member on the side where the blowing direction is guided by the guide means (18) is separated from the ceiling plane (70) by 45 mm downward.

An air conditioner embedded in a ceiling, characterized in that:

3. In claim 1,

The air conditioner body (10) has a panel member (14) fixed to a ceiling surface and provided with an air outlet (16) so as to face the indoor space.

A spacer member (72) is provided for adjusting a vertical distance between the panel member (14) and the ceiling surface (70).

An air conditioner embedded in a ceiling, characterized in that:

4. In claim 1,

The outlet forming member on the side where the blowing direction is guided by the guide means (18) has a shape approaching the ceiling surface from the edge of the outlet (16) toward the outer peripheral side of the air conditioner body (10). An external inclined surface (14a) is formed,

The outer inclined surface (14a) has an inclination angle of at least 10 degrees with respect to a ceiling surface at least near the edge of the outlet (16). A ceiling-mounted air conditioner characterized by the following.

5. In claim 1,

The line connecting the boundary position between the air conditioner body (10) and the ceiling surface (70) and the lowermost part of the air outlet forming member on the side where the blowing direction is guided by the guide means (18) is located on the ceiling surface (70). The angle of inclination is set to 10 degrees or more

An air conditioner embedded in a ceiling, characterized in that:

6. In claim 1,

A first inclined surface (1) inclined from the lowermost part of the air outlet forming member on the side where the blowing direction is guided by the guide means (18) toward the outer peripheral side of the air conditioner body (10) toward the ceiling surface. 4a) and a second inclined surface following the first inclined surface (14a) is formed,

The inclination angle of the first inclined surface (14a) with respect to the ceiling surface (70) is equal to or less than 12 degrees, and the inclination angle of the second inclined surface with respect to the ceiling surface (70) is greater than 12 degrees.

An air conditioner embedded in a ceiling, characterized in that:

7. An outlet (16) that is embedded in the ceiling surface (70) and blows out conditioned air toward the indoor space is provided, and the direction of the conditioned air blowing can be guided to the outlet (16). In the ceiling-mounted air conditioner provided with the guide means (18),

The outlet forming member on the side where the blowing direction is guided by the guide means (18) has a shape approaching the ceiling surface from the edge of the blowing port (16) toward the outer peripheral side of the air conditioner body (10). An external inclined surface (14a) is formed,

The external inclined surface (14a) has an inclination angle of at least 10 degrees with respect to a ceiling surface at least near the edge of the outlet (16).

An air conditioner embedded in a ceiling, characterized in that:

8. In either claim 4 or 7, The external inclined surface (14a) has an inclination angle of 10.8 degrees with respect to the ceiling surface at least near the edge of the outlet (16).

An air conditioner embedded in a ceiling, characterized in that:

9. An outlet (16) that is embedded in the ceiling surface (70) and blows out the conditioned air toward the indoor space is provided, and the direction of the conditioned air blowing can be guided to the outlet (16). In the ceiling-mounted air conditioner provided with the guide means (18),

The line connecting the boundary position between the air conditioner main body (10) and the ceiling surface (70) and the lowermost part of the outlet forming member on the side where the blowing direction is guided by the guide means (18) is located on the ceiling surface (70). The angle of inclination is set to 10 degrees or more

An air conditioner embedded in a ceiling, characterized in that:

1 0. In either claim 5 or 9,

The line connecting the boundary position between the air conditioner main body (10) and the ceiling surface (70) and the lowermost part of the outlet forming member on the side where the blowing direction is guided by the guide means (18) is located on the ceiling surface (70). The angle of inclination is assumed to be 10 · 8 degrees

An air conditioner embedded in a ceiling, characterized in that:

1 1. An outlet (16) that is embedded in the ceiling surface (70) and blows out conditioned air toward the indoor space is provided, and the direction of conditioned air blowing can be guided to the outlet (16). In the ceiling-mounted air conditioner equipped with the guide means (18),

A first inclined surface (14a) that is inclined from the lowermost part of the outlet forming member on the side where the blowing direction is guided by the guide means (18) toward the outer peripheral side of the air conditioner body U0) so as to approach the ceiling surface. ) And a second inclined surface following the first inclined surface (14a) is formed,

An air conditioner embedded in a ceiling, characterized in that:

12. In either claim 6 or 11,

The distance from the lowermost part of the outlet forming member to the boundary between the first inclined surface (14a) and the second inclined surface is 70 mm or more.

An air conditioner embedded in a ceiling, characterized in that:

13. In any one of claims 4, 5, 6, 7, 9, or 11,

The lowermost part of the outlet forming member on the side where the blowing direction is guided by the guide means (18) is at least 75 mm horizontally apart from the boundary position between the air conditioner body (10) and the ceiling surface (70). The ceiling-mounted air conditioner, characterized in that:

14. In claim 13,

The lowermost part of the air outlet forming member on the side where the blowing direction is guided by the guide means (18) is 79 mm horizontally away from the boundary between the air conditioner body (10) and the ceiling surface (70). A ceiling-mounted air conditioner characterized by this.

1 5. An air outlet (16), which is embedded in the ceiling surface (70) and blows out conditioned air toward the indoor space, is provided, and the air outlet direction (16) can be guided to the air outlet (16). In the ceiling-mounted air conditioner equipped with the guide means (18),

The lowermost part of the air outlet forming member on the side where the air outlet direction is guided by the guide means (18) is separated from the boundary position between the air conditioner body (10) and the ceiling surface (70) by at least 75 mm in the horizontal direction.

An air conditioner embedded in a ceiling, characterized in that:

16. In claim 15,

The lowermost part of the air outlet forming member on the side where the blowing direction is guided by the guide means (18) is 79 mm horizontally away from the boundary position between the air conditioner body (10) and the ceiling surface (70). This A ceiling-mounted air conditioner characterized by the following.

17. In any one of claims 1, 7, 9, 11, or 15,

The air outlet (16) is provided with a flow regulating member (19) for regulating the flow of the conditioned air in the longitudinal direction of the air outlet (16).

An air conditioner embedded in a ceiling, characterized in that:

18. In any one of claims 1, 7, 9, 11 or 15,

The ceiling embedded type air conditioner, wherein the guide means (18) is a horizontal blade capable of changing a blowing direction of the conditioned air up and down.

19. In claim 18,

A rectifying plate (19) that regulates the flow of air-conditioned air in the longitudinal direction is installed on the horizontal blade (18).

An air conditioner embedded in a ceiling, characterized in that:

20. In claim 19,

The horizontal blade (18) is composed of a long plate member that is curved in the width direction,

The current plate (19) is arranged at a predetermined interval over the entire surface in the longitudinal direction on a surface curved inside the horizontal blade (18).

An air conditioner embedded in a ceiling, characterized in that:

21. In any one of claims 1, 7, 9, 11, or 15,

The initial velocity of the air flow near the center of the outlet (16) is about 2 m / sec or more and about 6 m / sec or less

An air conditioner embedded in a ceiling, characterized in that:

22. In any one of claims 1, 7, 9, 11, or 15,

The approach distance of the conditioned air to the air outlet (16) is 30 mm or more

An air conditioner embedded in a ceiling, characterized in that:

23. In any one of claims 1, 7, 9, 11, or 15,

The position where the airflow blown from the outlet (16) finally separates from the air conditioner body (10) is at least 9 Omm away from the boundary position between the air conditioner body (10) and the ceiling surface (70). A ceiling-mounted air conditioner, characterized in that: