WO2008056740A1

WO2008056740A1 - Air conditioner

Info

Publication number: WO2008056740A1
Application number: PCT/JP2007/071710
Authority: WO
Inventors: Toshihiro Kizawa
Original assignee: Daikin Industries, Ltd.
Priority date: 2006-11-10
Filing date: 2007-11-08
Publication date: 2008-05-15
Also published as: EP2090839A1; EP2674685B1; JP4274229B2; ES2802248T3; AU2010227085B2; JP2008121951A; EP2674685A1; EP2090839B1; EP2090839A4; AU2010227085A1; AU2007318556A1; AU2007318556B2; ES2566110T3

Abstract

An air conditioner in which the required static pressure can be achieved even if a suction opening is positioned in a way where suction resistance tends to increase. The air conditioner has an indoor heat exchanger (4), a bellmouth (13) placed on the rear side of the indoor heat exchanger (4) and having an opening (13), through which air flows, placed facing the indoor heat exchanger (4), a casing (2) having a front panel (22) covering the front side of the indoor heat exchanger (4) and also having suction openings (8-11) and outlet openings (6, 7), and a turbofan (5) placed on the rear side of the bellmouth (13) and creating the flow of air drawn from the suction openings (8-11), passing through the heat exchanger (4) and the opening (14) of the bellmouth (13), and ejected from the outlet openings (6, 7). The suction openings (8-11) are arranged in the front panel (22) and/or around it and located on the substantially outer side of the opening of the bellmouth (13). The total suction asrea of the suction openings (8-11) is not less than 15% of the projection area in the front view of the indoor heat exchanger (4).

Description

Specification

Air conditioner

Technical field

[0001] The present invention relates to an air conditioner.

Background art

Conventionally, there has been known an air conditioner in which a front panel of a casing, a heat exchanger, and a bell mouth are sequentially arranged from the front side to the rear side, and a suction port is provided around the front panel. Yes. This air conditioner is equipped with a once-through fan, which sucks in / out of the air that is sucked from the suction port and through the opening of the heat exchanger and the bell mouth. A flow is generated (see Patent Document 1).

Patent Document 1: Japanese Patent Application Laid-Open No. 64-58965 (Figs. 1 and 2)

Disclosure of the invention

Problems to be solved by the invention

[0003] In the air conditioner as described above, since the suction port is provided around the front panel, the design of the front panel can be improved. Compared with the case where a suction port is provided in the center of the front panel, the air suction resistance increases. For this reason, the cross-flow fan has insufficient output, and it becomes difficult to ensure the required static pressure. The subject of this invention is providing the air conditioner which can ensure a required static pressure even if it is arrangement | positioning of the suction inlet which a suction resistance tends to increase.

Means for solving the problem

[0004] An air conditioner according to a first invention includes a heat exchanger, a bell mouth, a casing, and a turbofan. The bell mouth is disposed on the back side of the heat exchanger, and an opening through which air passes is provided facing the heat exchanger. The casing has a front panel that covers the front side of the heat exchanger, and is provided with a suction port and a blow-out port. The turbo fan is arranged on the back side of the bell mouse and generates a flow of air that is sucked from the suction port and blown out through the opening of the heat exchanger and the bell mouth. In addition, the suction port is provided on the front panel and / or around it, and from the opening of the bell mouth in the front view. Is also located substantially outside. The total suction area of the suction port is 15% or more of the projected area in the front view of the heat exchanger.

In this air conditioner, since the air flow is generated by the turbo fan, the required static pressure can be ensured even with the arrangement of the suction ports where the suction resistance tends to increase. In addition, if a turbofan is used when the suction port arrangement is likely to increase the suction resistance, the suction noise may increase. However, in the present invention, the total suction area of the suction port may When it is 15% or more of the projected area when viewed from the front, absorption and noise can be suppressed.

[0005] An air conditioner according to a second aspect of the present invention includes a heat exchanger, a bell mouth, a casing, and a turbofan. The bell mouth is disposed on the back side of the heat exchanger, and an opening through which air passes is provided facing the heat exchanger. The casing has a front panel that covers the front side of the heat exchanger, and is provided with a suction port and a blow-out port. The turbo fan is arranged on the back side of the bell mouse and generates a flow of air that is sucked from the suction port and blown out through the opening of the heat exchanger and the bell mouth. The suction port is provided on the front panel and / or around the front panel, and is located substantially outside the bell mouth opening in front view. The distance between the heat exchanger and the bell mouth is at least 10% of the diameter of the bell mouth opening.

In this air conditioner, since the air flow is generated by the turbo fan, the required static pressure can be ensured even with the arrangement of the suction ports where the suction resistance tends to increase. In addition, if the air flow is generated by the turbofan located on the back side of the heat exchanger, the air tends to flow toward the center of the heat exchanger and the heat exchange capacity may be reduced. In the invention, the distance force between the heat exchanger and the bell mouth is 10% or more of the diameter of the bell mouth opening, so that air can easily pass through a wider area of the heat exchanger, and the air conditioning capacity can be improved. Can do.

The invention's effect

[0006] In the air conditioner according to the first aspect of the invention, since the air flow is generated by the turbofan, the required static pressure can be ensured even with the arrangement of the suction ports where the suction resistance tends to increase. Touch with S. In addition, the total suction area of the suction port is the projection surface in the front view of the heat exchanger Suction noise can be suppressed by being 15% or more of the product.

In the air conditioner according to the second aspect of the invention, since the air flow is generated by the turbofan, the required static pressure can be ensured even with the arrangement of the suction ports where the suction resistance tends to increase. In addition, since the distance force S between the heat exchanger and the bell mouth is 10% or more of the diameter of the bell mouth opening, air can easily pass through a wider area of the heat exchanger, improving air conditioning capacity. Touch with force S.

Brief Description of Drawings

[0007] FIG. 1 is a front view of an air conditioner.

[Figure 2] Side view of the air conditioner.

FIG. 3 is a side sectional view of the air conditioner.

FIG. 4 is a schematic diagram showing a projected area of the indoor heat exchanger in a front view.

FIG. 5 is a schematic diagram showing the distance between the indoor heat exchanger and the bell mouth and the diameter of the bell mouth opening.

FIG. 6 is a graph showing the relationship between the ratio of the total suction area to the heat exchange area and the suction sound.

[Fig. 7] A graph showing the relationship between the distance between bell mouths and the air conditioning capacity of the bell mouth opening diameter.

Explanation of symbols

[0008] 1 Air conditioner

2 Casing

4 Indoor heat exchanger (heat exchanger)

5 Blower (turbo fan)

6 First outlet (outlet)

7 First outlet (outlet)

8 First suction port (suction port)

9 Second suction port (suction port)

10 Third suction port (suction port)

1 1 4th suction port (suction port)

13 Bellmouth 22 Front panel

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] <Configuration>

1 to 3 show an air conditioner 1 according to an embodiment of the present invention. FIG. 1 is a front view of the air conditioner 1, and FIG. 2 is a side view of the air conditioner 1. FIG. 3 is a side sectional view of the air conditioner 1. The air conditioner 1 is a floor-standing indoor unit, and includes a casing 2, an indoor heat exchanger 4, a bell mouth 13, and a blower 5. In the following description, the term “up / down / left / right” means up / down / left / right in the front view of the air conditioner 1. The casing 2 is made of a synthetic resin hollow housing, and houses the indoor heat exchanger 4, the bell mouth 13 and the blower 5 inside. The casing 2 includes a casing main body 21 and a front panel 22 attached to the front surface of the casing main body 21.

[0010] The casing body 21 has a large front opening. Inside the casing body 21, the indoor heat exchanger 4, the bell mouth 13, and the blower 5 are arranged in this order from the front side to the back side. Has been.

A first outlet 6 and a second outlet 7 are provided on the front surface of the casing 2. The first outlet 6 is a horizontally long opening provided along the upper end of the front surface of the casing 2 and allows air to be blown into the room. The second outlet 7 is a horizontally long opening provided along the front lower end of the casing 2 and allows air to be blown into the room. The first outlet 6 is provided with a first flap 61 for guiding the air blown from the first outlet 6 so as to be rotatable, and the first flap 61 opens and closes the first outlet 6. be able to. In addition, the second air outlet 7 is provided with a second flap 62 for guiding the air blown from the second air outlet 7 so as to be rotatable!

The front panel 22 is attached to the front surface of the casing body 21 and has a smaller outer shape than the front surface of the casing body 21. The front panel 22 covers the front side of the indoor heat exchanger 4 and is disposed below the first outlet 6 in a front view. Also, The front of the front panel 22 is arranged at a slight distance from the front of the casing main body 21 to the front, and connects the side edge of the front of the front panel 22 and the front of the casing main body 21 on both sides of the front panel 22. 23 and 24 are provided with a first suction port 8 and a second suction port 9, respectively. The first suction port 8 is a vertically long opening provided on the right side surface 23 of the front panel 22, and the air sucked into the casing 2 from the room passes therethrough. The second suction port 9 is a vertically long opening provided on the left side surface 24 of the front panel 22, and allows air to be sucked into the casing 2 from the interior force.

In addition, a third suction port 10 is provided on the upper surface 25 of the front panel 22 that connects the upper end portion of the front surface of the front panel 22 and the front surface of the casing body 21. The third suction port 10 is a horizontally long opening provided below the first blower port 6, through which air sucked into the casing 2 from the room passes. A fourth suction port 11 is provided in the lower part of the front of the front panel 22. The fourth suction port 11 is a horizontally long opening provided above the second blow-out port 7 and allows air to be sucked into the casing 2 from inside the room. Note that the lower surface of the front panel 22 that connects the front lower end of the front panel 22 and the front surface of the casing body 21 is closed. In addition, the front portion of the casing 2 between the third suction port 10 and the fourth suction port 11 is provided with an opening! /, Na! /, A flat flat panel portion 20! /, The As described above, the casing 2 is provided with four suction ports from the first suction port 8 to the fourth suction port 11 in the four directions of the upper, lower, left and right around the flat panel portion 20 of the front panel 22. Air is sucked in from the four directions of the flat panel section 20 in the up, down, left and right directions. Further, as shown in FIG. 1, these suction ports 8-11 are located outside the opening 14 of the bell mouth 13 in a front view.

[Indoor heat exchanger 4]

An indoor heat exchanger 4 shown in FIG. 3 forms a refrigerant circuit together with an outdoor heat exchanger arranged in an outdoor unit (not shown), and performs heat exchange with air passing therethrough. The indoor heat exchanger 4 is disposed on the back side of the front panel 22. The indoor heat exchanger 4 has a thin plate-like outer shape and is provided in parallel with the flat panel portion 20. In addition, the indoor heat exchanger 4 has the same size as the front panel 22 in the front view, and as shown in FIG. 4, the projected area in the front view of the indoor heat exchanger 4 is B, Suction port 8-11 S / B≥0.15, where S is a notch area. That is, the total suction area S of the suction ports 8-11 is 15% or more of the projected area B in the front view of the indoor heat exchanger 4.

[Bellmouth 13]

The bell mouth 13 is provided on the back side of the indoor heat exchanger 4, and the bell mouth 13 has a flat part 15 and a circular pipe part 16. The flat portion 15 has an outer shape that is approximately the same size as the indoor heat exchanger 4 when viewed from the front, and is provided in parallel with the indoor heat exchanger 4 so as to face the back surface of the indoor heat exchanger 4. . The flat portion 15 is connected to the edge on the inlet side of the opening 14 of the circular pipe portion 16. The circular pipe portion 16 is curved so that the diameter of the front end side is increased, and is gently connected to the peripheral edge of the opening 14. Here, as shown in FIG. 5, the distance between the indoor heat exchanger 4 and the bell mouth 13, that is, the distance between the indoor heat exchanger 4 and the inlet of the opening 14 of the bell mouth 13 is a, bell. If the diameter of the opening of mouse 13 is d, a / d≥0.1. That is, the distance a between the indoor heat exchanger 4 and the bell mouth 13 is 10% or more of the diameter d of the opening 14 of the bell mouth 13. The rear end of the circular pipe portion 16 enters the inside of the fan cover 53 through an opening in the front of the fan cover 53 described later. Moreover, the opening 14 of the bell mouth 13 has a smaller outer shape than the indoor heat exchanger 4 when viewed from the front!

[Blower 5]

The blower 5 is disposed on the back side of the bell mouth 13 and is sucked from the suction ports 8-11, passes through the indoor heat exchanger 4 and the opening 14 of the bell mouth 13, and is blown out from the blowout ports 6, 7. Produces a flow of air. The blower 5 is a turbo fan that sucks air from the front side and blows air in the centrifugal direction, and includes a fan rotor 51, a fan motor 52, and a fan cover 53.

The fan rotor 51 is arranged so that the rotation axis AX is horizontal, and has a plurality of blades arranged so as to be separated while drawing a spiral.

The fan motor 52 is a drive source that rotationally drives the fan rotor 51, and is disposed behind the fan rotor 51.

The fan cover 53 is a member disposed on the front side of the fan rotor 51, and an opening through which air taken into the fan cover 53 passes is provided on the front surface of the fan cover 53. The The air passing through the front opening of the fan cover 53 is blown up and down by being blown in the centrifugal direction by the fan rotor 51, and blown into the room from the first blowout port 6 and the second blowout port 7.

(1)

In this air conditioner 1, suction ports 8-11 are provided on the upper surface 25, the right side surface 23, the left side surface 24, and the front lower portion of the front panel 22, and the central portion is a smooth flat panel portion 20. . For this reason, the external appearance of the air conditioner 1 in a front view can be simplified, and the power S can be improved.

[0016] Further, the suction ports 8-11 are arranged outside the opening 14 of the bell mouth 13 in a front view. For this reason, the air sucked from the suction ports 8-11 can be passed through the wide range of the indoor heat exchanger 4, and the air conditioning capability can be improved.

Further, by providing the fourth suction port 11 at the lower front portion of the front panel 22, it is possible to increase the suction area while suppressing an increase in the size of the other suction ports 8-10. As a result, it is possible to suppress an increase in the thickness of the front panel 22 due to an increase in the size of the other suction ports 8-10, and to reduce the outer shape of the air conditioner 1.

(2)

The arrangement of the inlets 8-11 as described above increases the suction / intake resistance. However, in this air conditioner 1, an air flow is generated by the blower 5 that is a turbofan. The necessary static pressure can be sufficiently secured.

[0017] In addition, as compared with the case where a cross-flow fan is provided at each of the upper and lower outlets as in a conventional air conditioner, the air conditioner 1 according to the present invention provides a necessary air flow by one turbofan. Can be generated. Thereby, manufacturing cost can be reduced.

(3)

If the turbo fan is used in the arrangement of the suction port 8-11 as described above! /, The force that may increase the suction noise! / In this air conditioner 1, the suction port 8-11 The total suction area S of the indoor heat exchanger 4 is 15% or more of the projected area B in the front view, Inhalation sound can be suppressed. That is, as shown in FIG. 6, the effect of reducing the suction sound is sufficiently obtained in the range of S / B≥15%. In order to increase S / B, it is necessary to increase the total suction area. From the viewpoint of reducing the size of air conditioner 1, considering that S / B should be smaller, it is more desirable that it is 0.15. ≤S / B≤0.35, for example, S / B = 0.2.

[0018] Further, when a flow of air is generated by one turbofan disposed on the back side of the indoor heat exchanger 4, the air tends to be biased toward the central portion of the indoor heat exchanger 4, and heat is generated. Force that may reduce the exchange efficiency In this air conditioner 1, because the distance a between the indoor heat exchanger 4 and the bell mouth 13 is 10% or more of the diameter d of the opening 14 of the bell mouth 13, Air can easily pass through a wider range of the indoor heat exchanger 4, and air conditioning capacity can be further improved. That is, as shown in FIG. 7, the effect of increasing the air conditioning capacity is sufficiently obtained in the range of a / d≥10%. Also, in order to increase a / d, it is necessary to increase the distance between the indoor heat exchanger 4 and the bell mouth 13, so from the viewpoint of reducing the thickness of the air conditioner 1, it is better to decrease a / d. More preferably, 0.l≤a / d≤0.25, for example, a / d = 0.15.

(1)

In the above embodiment, all of the suction ports 8-11 may be provided in a portion of the casing body 21 that is located around the front panel 22 in part or in whole.

(2)

In the above embodiment, the air conditioner 1 is a floor-standing air conditioner, but the present invention can also be applied to a wall-mounted or ceiling-embedded air conditioner.

(3)

In the above-described embodiment, the suction ports 8-11 are located at a force S located outside the opening 14 of the bell mouth 13 in the front view, and somewhat inside the opening 14 of the bell mouth 13. Also good. For example, the suction port 8-11 may be located inside the opening 14 of the bell mouth 13 as long as the position is 80% of the inner diameter of the opening 14 of the bell mouth. That is, The suction ports 8-11 need only be outside the position of 80% of the inner diameter of the opening 14 of the bell mouth 13 in front view.

Industrial applicability

The present invention is effective as an air conditioner because it has the effect of ensuring the necessary static pressure even with the arrangement of the suction ports where the suction resistance tends to increase.

Claims

The scope of the claims

[1] heat exchanger (4),

A bell mouth (13) disposed on the back side of the heat exchanger (4) and having an opening (14) through which air passes facing the heat exchanger (4);

A casing (2) having a front panel (22) covering the front side of the heat exchanger (4) and provided with a suction port (8-11) and a discharge port (6, 7);

It is arranged on the back side of the bell mouth (13), is sucked in from the suction port (8-11), passes through the heat exchanger (4) and the opening (14) of the bell mouth (13), and the outlet port ( 6, 7) a turbofan (5) that generates a flow of air blown from

With

The suction port (8-11) is provided on the front panel (22) and / or around the front panel (22), and is located substantially outside the opening (14) of the bell mouth (13) in a front view. The total suction area of the mouth (8-11) is 15% or more of the projected area in the front view of the heat exchanger (4).

Air conditioner (1).

[2] heat exchanger (4),

With

The suction port (8-11) is provided on the front panel (22) and / or around the front panel (22), and is located substantially outside the opening (14) of the bell mouth (13) in a front view. The distance between the heat exchanger (4) and the bell mouth (13) is 10% or more of the diameter of the opening (14) of the bell mouth (13).

Air conditioner (1).