JP3307301B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the shape and configuration of a deodorizing heater and a heat shield used in an air conditioner or the like.

[0002]

2. Description of the Related Art An air conditioner using a conventional deodorizing heater has a configuration as shown in FIG.

FIG. 4 is a schematic view of an indoor unit of an air conditioner. A cross flow fan 1 is formed by combining a plurality of blades each having a predetermined length in a columnar shape in a rotating shaft direction. A heat exchanger 2 which is located adjacent to and above the heat exchanger, and which is arranged by connecting two heat exchangers in a C-shape and bending, and a refrigerant inlet pipe for heating at a central portion between the two heat exchangers The deodorizing heater 3 is located 25 mm above the cross flow fan and located above the cross flow fan, and the heat insulating plate 4 is located behind and below the deodorizing heater.

[0004] During the heating operation, the refrigerant flows into the heat exchanger from the refrigerant inlet pipe 5, performs heat exchange, and then flows out from the refrigerant outlet pipe 6.

According to the configuration of the conventional air conditioner, when viewed in a sectional view of a part A in FIG. 4, the deodorizing heater 3 is located at the center of the front heat exchanger 7 and the rear heat exchanger 8 in the heat exchanger 2. It is arranged in the department. 4, when viewed in detail in section B, the heat-insulating plate 4 and the deodorizing heater 3 are disposed such that the tip of the heat-insulating plate 4 is positioned perpendicular to the deodorizing heater 3. Thereby, when the deodorizing heater 3 is energized, the high-temperature airflow generated when the air volume is low is diffused, and the abnormal sound emitted from the indoor unit is reduced.

The shape of the end of the heat insulating plate 4 is
Is applied to improve the air blowing performance in the indoor unit.

[0007] Further, the column 10 which forms a slit-shaped hole formed in the heat insulating plate 4 prevents dew condensation on the heat insulating plate 4 under humid conditions.

[0008]

In the indoor unit having the above configuration, the deodorizing heater 3 is connected to the refrigerant inlet pipe for heating the central portion of the front heat exchanger 7 and the rear heat exchanger 8.
Since it is arranged at 5 to 25 mm, the deodorizing heater 3
And since the distance heating operation refrigerant inlet pipe 5 is close, at a heating rated <br/> capacity 3.6kw above model, the surface temperature at the time of energization of the heating operation the deodorizing heater 3 was too elevated .

Further, the heat insulating plate 4 and the deodorizing heater 3
Is arranged such that the tip of the heat-insulating plate 4 is positioned on a vertical straight line with the deodorizing heater 3. In this positional relationship, the abnormal sound generated when the air volume from the indoor unit is high is suppressed. Can not do.

The heat-insulating plate 4 has a tip 9 provided with a hole 9 on a slit. However, the deodorizing heater 3 and the tip of the heat-insulating plate 4 are arranged in a vertical straight line. In this case, since the opening area of the hole on the slit formed in the heat insulating plate 4 is small, the blowing performance is reduced when the air volume is low.

Further, the strut 10 forming a slit-shaped hole formed in the heat insulating plate 4 prevents dew condensation on the heat insulating plate 4 under humid conditions. However, since the width of the strut is small, In addition, in models having a cooling capacity of 2.5 KW or more, dew condensation on the heat insulating plate 4 is generated.

The present invention solves such a conventional problem.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention improves the positional relationship of a deodorizing heater and the shape of a heat insulating plate.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first technical means of the present invention for solving the above-mentioned problems is that a position of the deodorizing heater 3 is set at a time of heating provided in a front heat exchanger 7 of the heat exchanger 2. By positioning the heater at a distance of 29 mm or more from the refrigerant inlet pipe 5, even in a model having a heating rated capacity of 3.6 kW or more, an excessive rise in the surface temperature is suppressed when the deodorizing heater 3 is energized during the heating operation.

The second technical means is that, in the positional relationship between the heat-insulating plate 4 and the deodorizing heater 3, the tip of the heat-insulating plate 4 is disposed 5 mm forward of a line perpendicular to the deodorizing heater 3. . Thereby, when the deodorizing heater 3 is energized, the flow of the high-temperature airflow around the deodorizing heater 3 and the abnormal sound generated from the rotation of the cross flow fan 1 are suppressed from a low air volume region to a high air volume region.

The third technical means is that, in the positional relationship between the heat-insulating plate 4 and the deodorizing heater 3, the tip of the heat-insulating plate 4 is disposed so as to be located forward of a line perpendicular to the heater 3. The opening area of the hole 9 formed in the heat insulating plate 4 is further increased.

[0017] This suppresses a decrease in the air blowing performance when the air volume is low. Fourth technical means is that the heat insulating plate 4
The dew condensation on the heat-insulating plate 4 under humid conditions is suppressed in a model having a cooling capacity of 2.5 kW or more by extending the width of the column 10 forming the hole 9 formed in the above.

[0018]

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

(Example 1) In FIG. 1, a cross-flow fan 1 in which a plurality of blades each having a certain length are arranged in a columnar shape is combined with an impeller in a rotation axis direction, and is positioned close to and above the cross-flow fan. Shi 2
Like the heat exchanger and the heat exchanger 2 to dispose linked by bending shaped Ha, deodorizing heater positioned above the position and the cross flow fan to the center portion between the two heat exchangers 3, the position of the deodorizing heater 3 is at least 29 mm from the heating-time refrigerant inlet pipe in the front heat exchanger 7 of the heat exchanger 2, when viewed in a sectional view of the A section. Place them apart. As a result, the heating constant
In a model having a rating capacity of 3.6 KW or more, the surface temperature of the deodorizing heater 3 at the time of energizing the deodorizing heater 3 during the heating operation is reduced from 270 degrees to 250 degrees.

(Embodiment 2) FIG.
And the positional relationship between the heat insulating plate 4 and the deodorizing heater 3
And the tip of the heat insulating plate 4 is perpendicular to the heater 3 for deodorization.
Dispose 5 mm ahead of the straight line. This
When the deodorizing heater 3 is energized, the deodorizing heat
Of the high-temperature airflow around the fan 3 and the cross-flow fan
The abnormal sound generated from the rotation of 1 in the low air volume range 4.5 (m^Three/
min) to high air volume range 10.9 (m ^Three/ Min)
(See FIG. 2).

[0021] In Part B detailed view in (Embodiment 3) FIG. 1, in the positional relationship between the deodorizing heater 3 and the heat insulating plate 4, a front end portion of the heat insulating board 4 to the front than the normal of the deodorizing heater 3 Put out 5 mm and arrange. As a result, the opening area of the hole 9 formed at the end of the heat insulating plate 4 can be increased by a total of 18.25 (cm @ 2). As a result, when the air volume is low (7.0 m3 /
min) or less can be suppressed (see FIG. 3).

Embodiment 4 In the detailed view of the portion B in FIG. 1, the width of a column 10 forming a hole 9 formed in the heat insulating plate 4 is set to 15 mm. Thereby, the condensation on the heat insulating plate 4 under the humid condition can be suppressed in the models having the cooling capacity of 2.5 kW or more.

[0023]

As is apparent from the above embodiment, according to the first aspect of the present invention, the position of the deodorizing heater 3 is changed to the front heat exchanger 7 in the heat exchanger 2 from the refrigerant inlet pipe 5 for heating. By increasing the distance by 29 mm or more, it is possible to suppress a rise in the surface temperature when the deodorizing heater 3 is energized during the heating operation,
While ensuring temperature safety around the deodorizing heater 3,
The number of times of operation of the temperature protection control circuit for the deodorizing heater 3 is reduced, and the reliability is improved.

According to the second aspect of the present invention, in the positional relationship between the heat-insulating plate 4 and the deodorizing heater 3, the front end of the heat-insulating plate 4 is protruded 5 mm ahead of a vertical line of the deodorizing heater 3. And arrange them. Thereby, when the deodorizing heater 3 is energized, the flow of the high-temperature airflow around the deodorizing heater 3 and the abnormal sound generated from the rotation of the cross-flow fan 1 can be reduced in the actual use whole air volume range. is there.

According to the third aspect of the present invention, in the positional relationship between the heat-insulating plate 4 and the deodorizing heater 3, the tip of the heat-insulating plate 4 is projected forward of a line perpendicular to the deodorizing heater 3. By arranging and enlarging the opening area of the hole 9 provided at the tip of the heat insulating plate 4, there is an effect of suppressing a remarkable decrease in the blowing performance in a low air volume region.

[0026]

[Brief description of the drawings]

FIG. 1A is a perspective view of a first to a fourth embodiment of the present invention. FIG. 1B is a side view of the same. FIG. 1C is a perspective view of the same.

FIG. 2 is a graph showing the relationship between the air volume of an indoor unit and the sound pressure level difference between when a heater is energized and when no heater is energized.

FIG. 3 is a graph showing the relationship between the number of revolutions (cross flow fan) and the amount of indoor air.

FIG. 4A is a perspective view of a conventional example. FIG. 4B is a side view of the main part. FIG. 4C is a perspective view of the main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cross flow fan 2 Heat exchanger 3 Deodorizing heater 4 Heat insulation plate 5 Inlet piping (at the time of heating) 6 Outlet piping (at the time of heating) 7 Front heat exchanger 8 Rear heat exchanger 9 Hole (opening) in heat insulation plate 10 Heat insulation Prop on board

Continuation of the front page (56) References JP-A-9-79602 (JP, A) JP-A-6-288568 (JP, A) JP-A-6-137583 (JP, A) Jpn. , U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 1/00

Claims (3)

(57) [Claims] 1. A cross flow fan comprising a plurality of blades each having a predetermined length arranged in a columnar shape and having a plurality of blades arranged in a columnar shape, and a cross flow fan which is located near and above the impeller.
A heat exchanger in which the two heat exchangers are arranged in a U-shape and bent and connected, and a deodorization heater located in the center between the two heat exchangers and located above the cross flow fan. ,
In an air conditioner comprising a back plate and a heat insulating plate located at a lower portion of the deodorization heater, the position of the deodorization heater is disposed apart from a refrigerant inlet pipe for heating in the heat exchanger. Air conditioner. 2. A deodorizing heater and a heat insulating plate located at a back portion and a lower portion of the deodorizing heater, wherein a length of the heat insulating plate located at a lower portion of the deodorizing heater is extended forward of a vertical straight line of the deodorizing heater. The air conditioner according to claim 1, wherein: 3. A deodorizing heater and a heat-insulating plate located at the back and under the deodorizing heater, wherein the length of the heat-insulating plate located below the deodorizing heater is extended, and a slit-shaped heat-insulating plate is provided on the heat-insulating plate. The air conditioner according to claim 1, wherein an opening area is enlarged .