JP3331873B2 - Air conditioner indoor unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor unit of an air conditioner provided with a once-through blower, for sucking and blowing indoor air.

[0002]

2. Description of the Related Art FIG. 6 is a cross-sectional side view showing a conventional air conditioner indoor unit similar to the air conditioner indoor unit disclosed in Japanese Utility Model Publication No. 7-42009. In the figure, reference numeral 1 denotes a box of an indoor unit, and 2 denotes an impeller constituting a once-through blower, which is provided at a central portion in a cross section of the box 1. 3 is a front suction port provided on the front surface of the box 1 and arranged upstream of the impeller 2, 4 is a top suction port provided on the upper surface of the box 1 and arranged upstream of the impeller 2, Reference numeral 5 denotes an outlet provided on the lower surface of the box 1 and arranged downstream of the impeller 2.

[0003] Reference numeral 6 denotes a blow-out air passage provided between the box 1 and the outlet 5 on the downstream side of the impeller 2, and 7 denotes a box 1
A filter provided inside the filter and disposed so as to cover the front suction port 3 and the top suction port 4 is a front heat exchanger, which is provided between the impeller 2 and the filter 7 and is provided at a middle portion in the height direction. 9 are provided, are formed in a "C" shape in cross section, and the upper side and the lower side are respectively arranged obliquely in the direction of the impeller 2, and are provided through a large number of aluminum fins 10 and the fins 10. The heat transfer tube 11 is constituted.

A back heat exchanger 12 is provided between the impeller 2 and the filter 7, and has an upper edge facing an upper edge of the front heat exchanger 8 and a lower edge in a cross section of the box 1. Are arranged to be inclined in a direction away from the bending portion 9 of the front heat exchanger 8,
Similarly to the front heat exchanger 8, it is constituted by a number of aluminum fins and heat transfer tubes provided through the fins.

[0005] The conventional indoor unit of the air conditioner is configured as described above, and the impeller 2 is driven by an electric motor (not shown) to operate the once-through blower, and the indoor air flows from the front inlet 3 and the upper inlet 4 to the indoor air. Is inhaled. Then, the intake air is heat-exchanged by the front heat exchanger 8 and the rear heat exchanger 12, and is blown from the outlet 5 through the outlet air passage 6.

[0006]

In the conventional air conditioner indoor unit as described above, although the box 1 is downsized in cross section, the impeller 2 is provided with the front heat exchanger 8 and the rear heat exchanger. It is arranged close to the vessel 12. Due to this, the wind speed obtained by the operation of the once-through blower is small,
Moreover, the noise relative to the wind speed increases. Therefore, there has been a problem that it is difficult to obtain required air conditioning performance, and that the quietness of the room where the indoor unit is installed is impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to provide an indoor unit of an air conditioner which is small in size, has a required air conditioning capability, and has little noise with respect to the obtained wind speed. The purpose is to gain.

[0008]

In an indoor unit of an air conditioner according to the present invention, a front suction port provided on a front surface,
Upper surface suction port provided on the upper surface, and provided on the lower surface
A box body having a lower surface outlet, provided in the box body,
Heat exchange between indoor air sucked from the above front and top air inlets
A once-through blower that blows air to the lower surface outlet through a heat exchanger
Wherein the heat exchanger is opposed to the front suction port.
And a vertical heat exchanger placed almost vertically
Upward inclined connected to the top of the exchanger and inclined toward the blower
The oblique heat exchanger is connected to the lower part of the vertical heat exchanger.
A lower inclined heat exchanger inclined toward the blower side.
In the indoor unit of the air conditioner, the lower inclined heat exchanger and the
The length in the height direction of the vertical heat exchanger and the above-
So that it becomes longer in order,
The inclination angle of the heat exchanger is set to be approximately 45 ° .

In the indoor unit for an air conditioner according to the present invention, the lower inclined heat exchanger, the vertical heat exchanger,
The length ratio in the height direction with the above inclined heat exchanger is approximately 3: 4:
5 is obtained .

[0010]

Also, in the indoor unit of the air conditioner according to the present invention, a front suction port provided on a front surface and a front suction port provided on an upper surface.
Upper surface suction port and lower surface blowout provided on the lower surface
A box having a mouth, provided in the box,
And the indoor air sucked from the upper air inlet through the heat exchanger.
And a once-through blower for blowing air to the lower surface outlet,
The heat exchanger is opposed to the front and top suction ports
With the front heat exchanger placed, and behind this front heat exchanger
The indoor air that is arranged and sucked from the back side of the upper surface suction port
Air conditioner room consisting of a rear heat exchanger that cools air
The fin pitch of the rear heat exchanger
The pitch is smaller than the fin pitch interval of the front heat exchanger .

Further, in the indoor unit of the air conditioner according to the present invention, the fin pitch interval of the back heat exchanger is not satisfied.
The fin pitch interval of the front heat exchanger is approximately 1.2
It is a ratio .

[0013]

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 shows an example of an embodiment of the present invention, and is a cross-sectional side view of an indoor unit of an air conditioner. In the figure, reference numeral 1 denotes a box of an indoor unit, and 2 denotes an impeller constituting a once-through blower, which is provided at a central portion in a cross section of the box 1. Reference numeral 3 denotes a front suction port provided on the front surface of the box 1 and arranged on the upstream side of the impeller 2, and 4 denotes an impeller 2 provided on the upper surface of the box 1.
The upper surface suction port is disposed on the upstream side of.

Reference numeral 5 denotes an outlet provided on the lower surface of the box 1 and disposed downstream of the impeller 2, and reference numeral 6 denotes a port provided on the box 1 and connected to the outlet 5 downstream of the impeller 2. The formed outlet air passage 7 is a filter provided in the box body 1 and arranged so as to cover the front inlet 3 and the upper inlet 4.

Reference numeral 13 denotes a front heat exchanger provided between the impeller 2 and the filter 7, and a vertical portion 14 corresponding to the front suction port 3, and a lower portion is disposed at an upper edge of the vertical portion 14. The upper side is constituted by an upper inclined portion 15 inclined in the direction of the impeller 2 and the upper side is constituted by a lower inclined portion 16 arranged on the lower edge of the vertical portion 14 and the lower side is inclined in the direction of the impeller 2. And a heat transfer tube 11 provided through the fin 10. Note that the bending portion 9 is formed between the vertical portion 14 and the upper inclined portion 15 and between the vertical portion 14 and the lower inclined portion 16.

In the indoor unit of the air conditioner configured as described above, the impeller 2 is driven by an electric motor (not shown) to operate the once-through blower, and the indoor air flows from the front suction port 3 and the top suction port 4. Inhaled. Then, the intake air is heat-exchanged by the front heat exchanger 13, and is blown from the outlet 5 through the outlet air passage 6.

The front heat exchanger 13 has a vertical portion 14,
It is formed in a groove shape consisting of three parts, an upper inclined part 15 and a lower inclined part 16. Therefore, the impeller 2 and the front heat exchanger 13
The distance between the inner side of the impeller 2 and the impeller 2 can be increased, the wind speed by the operation of the once-through blower increases, and the noise generated by the blower decreases. Further, it is possible to increase the amount of air to be blown when the noise level is about the same in the air blowing conditions.

Therefore, it is possible to easily obtain a predetermined amount of air to achieve a required air conditioning capability, and to obtain an indoor unit of an air conditioner that can operate quietly with little noise against wind speed due to the operation of the once-through blower. be able to. In addition, since a predetermined air volume can be easily obtained, a required heat exchange capacity can be obtained even if the rear heat exchanger 12 in the indoor unit shown in FIG. 6 is omitted. Therefore, manufacturing costs can be reduced.

Embodiment 2 In the embodiment of FIG. 1, the inclination angles of the upper inclined portion 15 and the lower inclined portion 16 of the front heat exchanger 13 are set to 4 with respect to the vertical line.
Set to 5 °. Thereby, the space in the box 1 can be effectively used, and the front heat exchanger 13 having a sufficiently large heat exchange area can be provided. Therefore, required air conditioning performance can be easily achieved.

Further, by setting the inclination angles of the upper inclined portion 15 and the lower inclined portion 16 to 45 °, it is possible to promote the flow of dew condensation attached to the front heat exchanger 13 during the cooling or dehumidifying operation of the air conditioner. it can. Thereby, the flow path of the suction airflow can be secured during the cooling or dehumidifying operation, and the air conditioning efficiency can be improved.

The length of the vertical portion 14, the upper inclined portion 15, and the lower inclined portion 16 of the front heat exchanger 13 in the cross section of the box 1, that is, the ratio of the length in the height direction in FIG. The inclined portion 16: the vertical portion 14: the upper inclined portion 15 = 3: 4: 5. As a result, the space efficiency in the box 1 is improved, and a predetermined amount of air can be easily obtained, so that a required heat exchange capacity can be easily obtained.

Embodiment 3 FIG. FIG. 2 is a diagram showing an example of another embodiment of the present invention.
It is a cross-sectional side view of the indoor unit of an air conditioner. In the figure,
The same reference numerals as those in FIG. 1 described above denote corresponding parts. Reference numeral 17 denotes a rear heat exchanger, which is provided between the impeller 2 and the filter 7, and whose upper edge in the cross section of the box 1 is the front heat exchanger 13. The upper edge portion 15 is disposed so as to face a gap with a gap therebetween, and the lower edge portion is disposed to be inclined in a direction away from the front heat exchanger 13. It is constituted by fins and heat transfer tubes provided through the fins.

In the indoor unit of the air conditioner configured as described above, the impeller 2 is driven by an electric motor (not shown) to operate the once-through blower, and the indoor air flows from the front suction port 3 and the top suction port 4. Inhaled. Then, the intake air is heat-exchanged by the front heat exchanger 13 and the rear heat exchanger 17, and is sent from the outlet 5 through the outlet air passage 6.

Since a front heat exchanger 13 is provided in the form of a groove comprising three parts, a vertical part 14, an upper inclined part 15, and a lower inclined part 16, a detailed description is omitted, but FIG.
In this embodiment, the same operation as in the embodiment of FIG. 1 can be obtained. In the embodiment of FIG. 2, the rear heat exchanger 17 is provided in addition to the front heat exchanger 13, so that the heat exchange area increases, and an indoor unit of an air conditioner having more excellent air conditioning performance is obtained. be able to.

Embodiment 4 FIG. 3 is a diagram for explaining an example of another embodiment of the present invention, and is a graph showing characteristics of a heat exchanger capacity ratio with respect to a fin interval ratio (front heat exchanger / back heat exchanger). In the embodiment of FIG. 2, the impeller 2
The wind speed at the position corresponding to the heat exchanger close to is reduced, and the wind speed at the position corresponding to the heat exchanger away from the impeller 2 is increased. Further, when the distance between the fins of the heat exchanger is small, the pressure loss increases. Therefore, when the distance between the fins of the front heat exchanger 13 and the rear heat exchanger 17 apart from the impeller 2 is the same, the amount of intake air from the rear heat exchanger 17 increases.

Therefore, the amount of intake air in both the front heat exchanger 13 and the rear heat exchanger 17 becomes uneven, and the heat exchange efficiency is reduced. With respect to such a phenomenon, the rear heat exchanger 1 is larger than the distance between the fins of the front heat exchanger 13.
By reducing the mutual spacing of the fins 7, the intake air amount in both of them is balanced. Thereby, the heat exchange efficiency is improved, and for example, when the noise generated by the blowing is the same, the blowing amount can be increased, and the air conditioning performance can be increased.

The distance between the fins of the rear heat exchanger 17 is set to be 1 to the distance between the fins of the front heat exchanger 13.
By narrowing by 0% to 30%, the front heat exchanger 13
And the maximum heat exchange efficiency by both the rear heat exchanger 17 and the rear heat exchanger 17 can be obtained. That is, the characteristics of the heat exchanger capacity ratio with respect to the fin spacing ratio (front heat exchanger / backside heat exchanger) are as shown in FIG. 3, and the fin spacing ratio of the front heat exchanger 13 / backside heat exchanger 17 is almost equal. When 1.2, almost 1.
02 and the heat exchanger capacity ratio become the maximum.

Embodiment 5 FIG. 4 is also a diagram showing an example of another embodiment of the present invention.
It is a cross-sectional side view of the indoor unit of an air conditioner. In the figure,
1 and 2 denote corresponding parts, and 18 denotes an impeller of a once-through blower, which is at least 10% larger than the diameter of the impeller 2 in the indoor unit of the conventional air conditioner shown in FIG. The large diameter, that is, at least 55% of the depth space dimension in the box 1 of the indoor unit on the back side of the front heat exchanger 13
It has a large diameter.

In the indoor unit of the air conditioner configured as described above, the impeller 18 is driven by an electric motor (not shown) to operate the once-through blower, and the indoor air flows from the front suction port 3 and the top suction port 4. Inhaled. Then, the intake air is heat-exchanged by the front heat exchanger 13 and the rear heat exchanger 17, and is sent from the outlet 5 through the outlet air passage 6.

Further, a front heat exchanger 13 and a rear heat exchanger 17 which are formed in a groove shape composed of a vertical portion 14, an upper inclined portion 15, and a lower inclined portion 16 are provided. And
Since the impeller 18 having a large diameter is provided, the space between the front heat exchanger 13 and the impeller 18 is reduced, but the required air volume can be easily obtained by the large-diameter impeller 18. Therefore, in the embodiment of FIG. 4, the same operation as in the embodiment of FIGS. 1 and 2 can be obtained.

Embodiment 6 FIG. FIG. 5 also shows an example of another embodiment of the present invention.
It is a cross-sectional side view of the indoor unit of an air conditioner. In the figure,
The same reference numerals as those in FIGS. 1 and 2 denote corresponding parts, and reference numeral 14 denotes a vertical portion of the front heat exchanger 13 which is higher than the opening height A of the front suction port 3 shown in FIG. It is formed in a height B dimension and is arranged at a position covering the front suction port 3.

In the indoor unit of the air conditioner configured as described above, the impeller 18 is driven by an electric motor (not shown) to operate the once-through blower, and the indoor air flows from the front suction port 3 and the top suction port 4. Inhaled. Then, the intake air is heat-exchanged by the front heat exchanger 13 and the rear heat exchanger 17, and is sent from the outlet 5 through the outlet air passage 6.

Since the front heat exchanger 13 is provided in the form of a groove comprising three parts, the vertical part 14, the upper inclined part 15, and the lower inclined part 16, detailed description is omitted, but FIG.
In this embodiment, the same operation as in the embodiment of FIGS. 1 and 2 can be obtained.

Further, in the embodiment of FIG. 5, the vertical portion 14 of the front heat exchanger 13 has an opening height A of the front suction port 3.
The opening height B is higher than the dimension, and is arranged so as to cover the front suction port 3. That is, the front heat exchanger 13
The bent portion 9 between the vertical portion 14 and the upper inclined portion 15 is located above the upper edge portion of the front inlet 3 and the vertical portion 14 and the lower inclined portion 1
The bent portion 9 between the lower and upper surfaces 6 is disposed below the lower edge of the front inlet 3.

For this reason, it is possible to prevent the generation of the suction airflow flowing from the edge of the front suction port 3 in the height direction to the once-through blower through the bending portion 9 of the front heat exchanger 13. Therefore, the airflow passing through the refraction portion 9 having a small heat exchange ability is reduced, and the air conditioning ability can be improved.

When the suction airflow flows into the refraction portion 9 of the front heat exchanger 13, the refraction portion 9 has a small pressure loss of the inflow airflow, so that the amount of inflow air increases. Then, the wind speed increases, a wake occurs, and the wake is applied to the impeller 18 to easily generate a whistle sound, which causes an increase in noise. However, such a problem can be prevented by reducing the airflow passing through the bending portion 9.

[0038]

According to the present invention, as described above ,
Front suction port provided, top suction provided on top
Box having a mouth and a lower surface outlet provided on the lower surface
And the front and top suction ports provided in the box body
The bottom air blown from the room air sucked in from the above through a heat exchanger
And a once-through blower that blows air to the outlet.
However, it was arranged almost vertically opposite the front suction port.
Connected to the vertical heat exchanger and the top of this vertical heat exchanger
The upper inclined heat exchanger inclined to the blower side, and the vertical heat
Downward inclined connected to the lower part of the exchanger and inclined toward the blower
An indoor unit of an air conditioner equipped with an oblique heat exchanger.
The lower heat exchanger, the vertical heat exchanger and the upper
The length of the oblique heat exchanger in the height direction should be gradually increased.
And the inclination angle of the longest upper inclined heat exchanger
Since the angle is set to approximately 45 °, the space in the box can be effectively used, and a heat exchanger having a sufficiently large heat exchange area can be provided.

[0039]

Further, the lower inclined heat exchanger and the vertical heat exchanger
Exchanger and the upper inclined heat exchanger have a length ratio of almost
Since the ratio is 3: 4: 5, the space efficiency in the box can be improved in a well-balanced manner.

[0041]

[0042]

[0043]

[0044]

According to the third aspect of the present invention , provided on the front surface
Front suction port, upper surface suction port provided on the upper surface, and
A box having a lower surface outlet provided on the lower surface, and the box
Provided inside the body and sucked through the front and top suction holes
Blows indoor air through the heat exchanger to the outlet on the bottom
And a once-through blower, wherein the heat exchanger is
Heat exchanger arranged opposite to the suction port on the upper surface
And located on the back side of this front heat exchanger,
Rear heat exchange to cool indoor air sucked from the back side of the mouth
The air conditioner indoor unit consisting of
Set the fin pitch of the heat exchanger to the fin of the front heat exchanger.
Since the pitch is smaller than the pitch interval, the intake air amount is balanced, so that the air conditioning capability can be increased.

[0046]

According to the fourth aspect, the backside heat exchange
Of the front heat exchanger with respect to the fin pitch
So that the pitch interval is about 1.2.
Thus, the heat exchanger capacity ratio is optimized, and the optimum air conditioning capacity can be obtained.

[0048]

[0049]

[0050]

[0051]

[0052]

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment and a second embodiment of the present invention, and is a cross-sectional side view of an indoor unit of an air conditioner.

FIG. 2 is a cross-sectional side view of an indoor unit of an air conditioner, showing a third embodiment and a fourth embodiment of the present invention.

FIG. 3 is a diagram for explaining the fourth embodiment of the present invention, and is a graph showing a characteristic of a heat exchanger capacity ratio with respect to a fin interval ratio (front heat exchanger / back heat exchanger).

FIG. 4 is a view showing Embodiment 5 of the present invention, and is a cross-sectional side view of an indoor unit of an air conditioner.

FIG. 5 is a view showing Embodiment 6 of the present invention, and is a cross-sectional side view of an indoor unit of an air conditioner.

FIG. 6 is a cross-sectional side view showing a conventional air conditioner indoor unit.

[Explanation of symbols]

1 box, 2 impeller, 3 front suction port,
4 Upper surface inlet, 5 outlet, 9 Refractor,
13 Front heat exchanger, 14 Vertical section, 15
Upper inclined part, 16 Lower inclined part, 17 Back heat exchanger, 18 impeller.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-164347 (JP, A) JP-A-7-145993 (JP, A) JP-A-7-190476 (JP, A) JP-A-7-190476 208753 (JP, A) JP-A-3-105131 (JP, A) JP-A-1-175225 (JP, U) JP-A-59-5315 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 1/00

Claims (4)

(57) [Claims] 1. A box having a front inlet provided on a front surface, an upper inlet provided on an upper surface, and a lower outlet provided on a lower surface, and a front body and an upper surface provided in the box body. A cross-flow blower that blows room air sucked from the mouth to the lower surface outlet through a heat exchanger, wherein the heat exchanger is disposed substantially vertically opposite the front inlet. And an upper inclined heat exchanger connected to the upper part of the vertical heat exchanger and inclined to the blower side, and a lower inclined heat exchanger connected to the lower part of the vertical heat exchanger and inclined to the blower side. In the indoor unit of the air conditioner comprising: the lower inclined heat exchanger, the vertical heat exchanger, and the upper inclined heat exchanger such that the length in the height direction is sequentially increased, The tilt angle of the long upper heat exchanger is approximately 45
° become way air conditioner of the indoor unit shall be the feature that was. 2. The height ratio of the lower inclined heat exchanger, the vertical heat exchanger, and the upper inclined heat exchanger is approximately 3:
The indoor unit of the air conditioner according to claim 1, wherein the ratio is set to 4: 5. 3. A box having a front suction port provided on a front surface, an upper suction port provided on an upper surface, and a lower air outlet provided on a lower surface, and the front and upper suction ports provided in the box body. A cross-flow blower that blows indoor air sucked from a mouth to the lower surface outlet through a heat exchanger, wherein the heat exchanger is disposed to face the front and upper surface suction ports. And a rear heat exchanger disposed on the rear side of the front heat exchanger and cooling the indoor air sucked from the rear side of the upper surface suction port, the indoor unit of the air conditioner, an indoor unit of an air conditioner, wherein a fin pitch was narrower than the fin pitch of the front heat exchanger. 4. The fin pitch interval of the front heat exchanger with respect to the fin pitch interval of the rear heat exchanger is approximately 1.
The indoor unit for an air conditioner according to claim 3, wherein the ratio is set to 2.