JP2017072296A - Indoor machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress enlargement of a product size while sufficiently obtaining Coanda effect of flowing blowout airflow from a blowout port along a surface.SOLUTION: An indoor machine 1 is configured such that at a lower end part of a front panel 22, provided are: a first surface 23 arranged in the front of a blowout port 21b, and extending obliquely upward; a second surface 24 arranged above the first surface 23 and formed obliquely upward as approaching its rear part; and a connection part 25 connecting the first surface 23 and the second surface 24, wherein for a length from an end part on a front side of the blowout port 21b to an end part on the opposite side to the blowout port 21b of the first surface 23 as a, and a length along a front-back direction of the indoor machine 1 as b, a/b is about 0.3, an angle formed by a horizontal surface and a line connecting the rear end and front end of the first surface 23 is 10 deg, and an angle formed by the line connecting the rear end and front end of the first surface 23 and a tangential plane at an end part on the blowout port 21b side of an upper wall 26a defining an air flow passage 26 connected to the blowout port 21b is 37 deg.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an indoor unit provided with an outlet for blowing out an air-conditioned airflow.

  This is an indoor unit that harmonizes the air sucked from the air inlet and blows it out from the air outlet. The indoor unit forms the upper wall of the air flow path facing the air outlet, and the guide is inclined so that it goes upward as it goes forward An indoor unit having a surface is known (for example, see Patent Document 1). In such an indoor unit, the air blown out from the air outlet is directed upward along the guide surface due to the Coanda effect.

JP 2004-101128 A

  In the indoor unit as described above, if the length of the guide surface (the length along the flow direction of the airflow from the air outlet) is too short, the Coanda effect cannot be sufficiently obtained. On the other hand, if the length of the guide surface is too long, the product size increases, resulting in a feeling of pressure during use and difficulty in transportation.

  Therefore, the present invention has been made to solve the above-described problems, and it is possible to increase the size of the product while sufficiently obtaining an under effect that allows the air flow from the air outlet to flow along the surface. It aims at providing the indoor unit which can suppress.

  An indoor unit according to a first aspect of the present invention is an air flow path through which air-conditioned air flows, an air outlet for blowing an air-conditioned air flow located at an end of the air flow path, and in front of the air outlet A first surface that is disposed and extends horizontally or obliquely upward, a second surface that is disposed above the first surface and is formed so as to be higher toward the rear, and the first surface and the first surface It is an indoor unit provided with the panel which has a connection part which connects two surfaces, Comprising: Length from the edge part of the said front side of the said blower outlet to the edge part on the opposite side to the said blower outlet A / b when the length along the front-rear direction of the indoor unit is b is 0.2 or more and 0.4 or less, and the rear end portion and the front of the first surface An angle θ1 formed by a line connecting the end portion on the side and the horizontal plane is 0 deg or more and 20 deg or less, and is located behind the first surface. The angle θ2 formed by the line connecting the end on the side and the end on the front side and the tangent plane at the end on the outlet side of the upper wall that defines the air flow path is 27 deg or more and 47 deg or less It is characterized by being.

  In this indoor unit, an increase in the product size can be suppressed while sufficiently obtaining the Coanda effect in which the airflow blown from the outlet is directed forward or upward along the first surface.

  An indoor unit according to a second invention is the indoor unit according to the first invention, wherein the first surface is a downwardly convex curved surface, and the radius of curvature Rd is not less than 400 mm and not more than 600 mm. Features.

  In this indoor unit, the airflow blown out from the outlet can be directed upward while being more surely along the first surface.

  As described above, according to the present invention, the following effects can be obtained.

  In 1st invention, the enlargement of a product size can be suppressed, obtaining the Coanda effect which fully orients the airflow which blown off from the blower outlet along the 1st surface to the front or upper direction.

  In the second aspect of the invention, the airflow blown from the blowout port can be directed upward while being more surely along the first surface.

It is a perspective view of the indoor unit concerning embodiment of this invention, (a) is the figure seen from diagonally upward, (b) is the figure seen from diagonally downward. It is a cross-sectional view of the indoor unit of FIG. It is an enlarged view of the lower end part of the front panel shown in FIG. It is a graph which shows the relationship between the ratio of the length from the front end of a blower outlet to the front end of a 1st surface with respect to the length of the front-back direction of an indoor unit, and the arrival distance of a blowing airflow. (A) is a graph which shows the relationship between the angle | corner which the line which connects the back end and front end of a 1st surface, and the horizontal surface, and the arrival distance of a blowing airflow, (b) is a back end of a 1st surface, It is a graph which shows the relationship between the angle | corner which the line which connects a front end and the blowing direction of an airflow, and the reach | attainment distance of a blowing airflow.

  Embodiments of the present invention will be described below with reference to FIGS.

  As shown in FIGS. 1 (a) and 1 (b), the indoor unit 1 of the present embodiment has an elongated shape in one direction as a whole, and is installed on a wall surface in the room so that its longitudinal direction is horizontal. It is what The indoor unit 1 constitutes an air conditioner together with an outdoor unit (not shown), and performs indoor air conditioning. In the following description, the direction protruding from the wall to which the indoor unit 1 is attached is referred to as “front”, and the opposite direction is referred to as “rear”. The longitudinal direction of the indoor unit 1 is simply referred to as “longitudinal direction”.

  As shown in FIG. 2, the indoor unit 1 mainly includes a casing 2, a heat exchanger 3, an indoor fan 4, a filter 5, and two horizontal blades 6a and 6b.

  The casing 2 includes a substantially rectangular parallelepiped grill 21 and a front panel 22 that covers the front surface of the grill 21. A suction port 21 a is formed on the upper surface of the casing 2. As shown in FIG. 1A, the suction port 21 a is formed across the grill 21 and the front panel 22. An air outlet 21 b is formed on the lower surface of the grill 21. As shown in FIG.1 (b), the blower outlet 21b is a rectangular-shaped opening long in a longitudinal direction.

  The heat exchanger 3, the indoor fan 4, and the filter 5 are disposed inside the grill 21. The indoor fan 4 extends along the longitudinal direction, and is configured to suck air into the casing 2 through the suction port 21a and blow out the air in the casing 2 from the blowout port 21b. An air channel 26 defined by an upper wall 26a and a lower wall 26b is formed between the indoor fan 4 and the air outlet 21b. The heat exchanger 3 is formed in an inverted V shape in which both ends are bent downward in a side view, and is disposed so as to surround the upper side and the front side of the indoor fan 4. In the heat exchanger 3, heat exchange is performed with the passing air. A filter 5 is disposed above and in front of the heat exchanger 3. The filter 5 removes dust contained in the air flowing toward the heat exchanger 3.

  The two horizontal blades 6a and 6b are disposed at the air outlet 21b. The horizontal blades 6a and 6b are provided to change the airflow direction in the vertical direction of the airflow blown from the blower outlet 21b and to open and close the blower outlet 21b. The horizontal blades 6a and 6b are rectangular plate members that are long in the longitudinal direction. The horizontal blade | wing 6a is arrange | positioned in the front side part in the blower outlet 21b, and the horizontal blade | wing 6b is arrange | positioned in the rear side part in the blower outlet 21b.

  The front panel 22 covers the front surface of the grill 21 as described above, and the upper end portion thereof constitutes a part of the suction port 21a, and the lower end portion thereof is positioned in the vicinity of the front end of the air outlet 21b. The front panel 22 is a surface facing forward, and has a front surface 22a extending downward from the vicinity of the front end of the suction port 21a to the vicinity of the lower end portion of the front panel 22. At the lower end of the front panel 22, it is disposed in front of the air outlet 21b, and is disposed above the first surface 23 and the first surface 23 extending obliquely upward, so that it goes upward as going backward. And a planar connecting portion 25 that connects the first surface 23 and the second surface 24 is provided. The first surface 23 and the second surface 24 are downwardly convex curved surfaces, and the radius of curvature Rd of the first surface 23 is 500 mm.

  As shown by arrows in FIG. 2, the blown air flow blown from the blower outlet 21 b flows along the first surface 23, and peels from the first surface 23 at the front end portion of the first surface 23. That is, the front end portion of the first surface 23 functions as a peeling portion 23 a from which the blown airflow from the air outlet 21 b peels from the front panel 22. The room air flowing downward along the front surface 22 a and the second surface 24 of the front panel 22 is separated from the second surface 24 at the lower end portion of the second surface 24. That is, the lower end portion of the second surface 24 functions as a peeling portion 24 a from which room air peels from the front panel 22. And the connection part 25 has connected the peeling part 23a of the blowing airflow, and the peeling part 24a of room air.

  The blown air flow peeled off from the front panel 22 in the peeling portion 23a and the indoor air peeled off from the front panel 22 in the peeling portion 24a are mixed at a position away from the front panel in front of the front panel 22. In addition, the connection part 25 is arrange | positioned inside the extended surface of the 1st surface 23 shown by the broken line in FIG. 2, and the extended surface of the 2nd surface.

  Here, as shown in FIG. 2, the length from the front end of the air outlet 21 b to the end of the first surface 23 opposite to the air outlet 21 b is a, and is along the front-rear direction of the indoor unit 1. FIG. 4 shows the relationship between a / b when the length is b and the reach distance of the airflow blown out from the outlet 21b. As can be seen from the graph of FIG. 4, the airflow arrival distance increases at a substantially constant rate with respect to the increase amount of the a / b value until the value of a / b reaches 0.35. From the time when the value of a / b exceeds 0.35, the increase amount of the air flow arrival distance with respect to the increase amount of the value of a / b gradually decreases. That is, by increasing the value of a / b to some extent, the airflow blown from the outlet 21b can be directed upward along the first surface 23, and the airflow reaching distance can be extended. On the other hand, when the value of a / b is larger than a certain level, the airflow arrival distance hardly changes. In the present embodiment, a / b = about 0.3.

  Further, as shown in FIG. 3, when the angle formed by the line L connecting the rear end and the front end of the first surface 23 and the horizontal plane is θ1, θ1 blows out from the outlet 21b. FIG. 5A shows the relationship with the reach distance of the airflow. As can be seen from the graph of FIG. 5A, the airflow arrival distance becomes the largest around θ1 = 11 deg. In the present embodiment, θ1 = 10 deg. Further, as shown in FIG. 3, at the end on the outlet 21 b side of the upper wall 26 a that defines the line L connecting the end on the rear side and the end on the front side of the first surface 23 and the air flow path 26. FIG. 5B shows the relationship between θ2 and the reach distance of the airflow blown from the outlet 21b when the angle formed with the tangential plane P is θ2. As can be seen from the graph of FIG. 5B, the airflow arrival distance becomes the largest around θ2 = 38 deg. In the present embodiment, θ2 = 37 deg.

Next, the operation of the indoor unit 1 will be described.
By driving the indoor fan 4, air is sucked into the casing 2 from the suction port 21a. The air sucked into the casing 2 is subjected to heat exchange after passing through the heat exchanger 3 after dust is removed by the filter 5. The air conditioned in the heat exchanger 3 passes through the indoor fan 4 and then flows through the air flow path 26 and is blown out from the air outlet 21b. The blown airflow blown out from the blower outlet 21b flows along the first surface 23 that extends obliquely upward due to the Coanda effect, and then the first surface 23 (front panel 22) at the peeling portion 23a at the end of the first surface 23. Peel from. The blown air flow peeled off from the front panel 22 is mixed with the room air peeled off from the second surface 24 (front panel 22) in the peeling portion 24a at a position separated from the front panel 22, and then heads toward the ceiling.

As described above, in the indoor unit 1 according to the present embodiment, the lower surface of the front panel 22 is disposed in front of the air outlet 21b and extends obliquely upward, and is disposed above the first surface 23. The second surface 24 is formed so as to be higher as it goes rearward, and the connection portion 25 that connects the first surface 23 and the second surface 24 is provided, and is provided on the front side of the air outlet 21b. A / b when the length from the end to the end of the first surface 23 opposite to the air outlet 21b is a and the length along the longitudinal direction of the indoor unit 1 is b is about 0.3. The angle θ1 formed between the line L connecting the end on the rear side and the end on the front side of the first surface 23 and the horizontal plane is 10 deg, and the end on the rear side of the first surface 23 and the front side The tangential plane at the end on the outlet 21b side of the upper wall 26a that defines the air flow path 26 connected to the line L connecting to the end of the air outlet 21b Angle θ2 with is 37Deg.
Accordingly, it is possible to suppress an increase in the product size while sufficiently obtaining the Coanda effect in which the airflow blown from the outlet 21b is directed obliquely upward along the first surface 23.

  Moreover, in the indoor unit 1 of this embodiment, the 1st surface 23 is a downward convex curved surface, and the curvature radius Rd is 500 mm. Therefore, the air flow blown out from the air outlet 21b can be directed upward while being more surely along the first surface 23.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the above-described embodiment, the case where the first surface 23 faces obliquely upward has been described, but the present invention is not limited to this. That is, the first surface 23 may be a surface extending horizontally.

  Further, in the above-described embodiment, the length from the front end of the air outlet 21b to the end opposite to the air outlet 21b of the first surface 23 is a, and the length along the front-rear direction of the indoor unit 1 A / b is about 0.3, and the angle θ1 formed by the line L connecting the rear end portion and the front end portion of the first surface 23 and the horizontal plane is 10 deg. There is a tangential plane at the end on the air outlet 21b side of the upper wall 26a that defines the air flow path 26 that connects the line L connecting the rear end and the front end of the first surface 23 to the air outlet 21b. Although the case where the angle θ2 formed by P is 37 deg has been described, the present invention is not limited to this. a / b should just be 0.2 or more and 0.4 or less. Further, the angle θ1 may be 0 deg or more and 20 deg or less, and the angle θ2 may be 27 deg or more and 47 deg or less.

  In the above-described embodiment, the first surface 23 is a downwardly convex curved surface and the curvature radius Rd is 500 mm. However, the present invention is not limited to this. The radius of curvature Rd of the first surface 23 is preferably 400 mm or more and 600 mm or less. Further, the first surface 23 may be a flat surface.

  In addition, in the above-described embodiment, the case where the first surface 23, the second surface 24, and the connection portion 25 are provided on the front panel 22 has been described, but the present invention is not limited to this. These may be provided on members other than the front panel 22. Moreover, the 1st surface 23, the 2nd surface 24, and the connection part 25 are not provided in the same member, and may be provided in the mutually different member.

  If this invention is utilized, enlargement of a product size can be suppressed, fully obtaining the under effect which makes the blowing airflow from a blower outlet flow along a surface.

DESCRIPTION OF SYMBOLS 1 Indoor unit 21b Air outlet 23 1st surface 24 2nd surface 25 Connection part

Claims (2)

An air flow path through which conditioned air flows;
Located at the end of the air flow path, an outlet for blowing out air-conditioned airflow,
A first surface disposed in front of the air outlet and extending horizontally or obliquely upward, a second surface having a surface disposed above the first surface and formed so as to be higher toward the rear; and An indoor unit comprising a panel having a connection portion connecting the first surface and the second surface,
A when the length from the front end of the air outlet to the end of the first surface opposite to the air outlet is a, and the length along the front-rear direction of the indoor unit is b / B is 0.2 or more and 0.4 or less, and the angle θ1 formed by the line connecting the rear end portion and the front end portion of the first surface and the horizontal plane is 0 deg or more, And a line connecting the end on the rear side and the end on the front side of the first surface and a tangential plane at the end on the outlet side of the upper wall defining the air flow path. The indoor unit is characterized in that the angle θ2 formed is not less than 27 deg and not more than 47 deg.   The indoor unit according to claim 1, wherein the first surface is a downwardly convex curved surface, and a radius of curvature Rd is not less than 400 mm and not more than 600 mm.

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