JP2000205601A - Outdoor unit for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote improvements in performance by equalizing the velocity distribution of the wind passing through a heat exchanger assembly in which a plurality of heat exchangers with different lengths are superposed in the outdoor unit for an air conditioner. SOLUTION: A heat exchanger assembly 114 which has the superposing of a propeller fan 110 at the central part, a bell mouth 111 that is installed to a front panel 102 opposite to the propeller fan 110 at the front part, and a plate-shaped heat exchanger 121 inside an L-shaped heat exchanger 120 at the rear part, are provided. The L-shaped heat exchanger 120 forms the back side and one side of an unit. In the outdoor unit for an air conditioner in which the rotation shaft of the propeller fan 110 is arranged vertically to the ventilating surface of the heat exchanger assembly 114, a partitioned air flowing guide 115 which is bent farther forward to reach the front panel 102 through the side of the bell mouth 111 is provided, so that an L-shaped channel is formed opposite to the side part 120b and the part of the following rear side part 120a of the L-shaped heat exchanger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit for an air conditioner, and more particularly to an outdoor unit for an air conditioner, which passes through a heat exchanger assembly comprising an L-shaped heat exchanger and a plate-shaped heat exchanger which are superposed on each other. TECHNICAL FIELD The present invention relates to an outdoor unit configured to equalize a speed distribution of a flowing wind.

[0002]

2. Description of the Related Art The prior art is disclosed in, for example, Japanese Patent Laid-Open No. 4-278.
According to No. 132, the heat exchanger is arranged on the back surface inside the outdoor main body unit, and an axial fan and a blower room having a bell mouth on its outer peripheral part are arranged in the center part of the outdoor unit main body. In the outdoor unit of the air conditioner in which the other room is defined around the room, the shape of the partition plate that defines the other room around the blower room is changed from the entire circumference of the heat exchanger to the outer periphery of the bell mouth. To converge. As a result, the wind flow guide that has passed through the heat exchanger is guided by the converging partition plate at the tip, and flows smoothly from the front of the heat exchanger to the bell mouth, eliminating the turbulence of the blown air and reducing the blowing noise. An outdoor unit of an air conditioner that can be reduced is obtained.

[0003] In addition to the above, a tapered inclined portion of the partition plate is provided at a predetermined distance or more from the heat exchanger. As a result, the airflow guide that has passed through the heat exchanger flows a predetermined distance in the same direction, and then is guided to the inclined portion of the partition plate and converges, so that the airflow guide at the outlet of the heat exchanger is not disturbed, Further, it is possible to obtain an outdoor unit of an air conditioner that reduces blowing noise. At the outlet, a decorative plate is arranged facing the internal axial fan, and a reinforcing member is provided on the axial fan side of the decorative plate, and the reinforcing member is covered with a guide plate or disposed in front of the axial fan. A secondary guide plate is provided directly below the guide plate that blows the blown air flow guide horizontally along the installation surface of the outdoor unit body, or the drive motor of the axial fan is embedded in the center of the guide plate. And a radial pointing arm of a drive motor having a twist guide at a predetermined angle with respect to the blown air flow guide is attached to the air outlet of the blower room. As a result, the flow of the blow-off air flow guide through the interior heat exchanger is smoothed, noise during operation is reduced, the volumes of the electrical component room and the compressor room can be increased, and the short cycle of the blow-off air flow guide is reduced. An outdoor unit of an air conditioner having an air passage configuration having sufficient strength as prevention and structure has been obtained.

[0004]

The outdoor unit for an air conditioner is often installed between buildings, but the area between buildings is extremely limited due to the recent high density of buildings. Therefore, the area for installing the outdoor unit for the air conditioner is limited. In addition, it is not only necessary to install only the outdoor unit for the air conditioner between buildings.Besides that, it is also conceivable to arrange household plumbing and storage, etc. In order to use the space effectively and to install more air conditioner outdoor units in a limited area, it is necessary to make the air conditioner outdoor units compact.

[0005] In the prior art, the flow of the blow-off air flow guide passing through the internal heat exchanger of the outdoor unit for an air conditioner becomes smooth, noise during operation is reduced, and the volumes of the electrical component room and the compressor room are increased. An outdoor unit of an air conditioner having a wind path configuration having both a short cycle of the blow-off air flow guide and a structure having sufficient strength as a structure has been obtained. If the configuration of the heat exchanger inside the outdoor unit is made different from that of the conventional one in order to achieve the above, a new problem occurs.

When the outdoor unit for an air conditioner is made compact, the inside of the outdoor unit is more crowded with a heat exchanger, a blower, a compressor, an electric box, and the like. In order to arrange the components such as the heat exchanger in a limited area of the outdoor unit floor plate, the heat exchanger has conventionally been constituted by a plurality of rows having almost the same length, but needs to be arranged in a single row. As a result, it is necessary to greatly increase the amount of air passing through the heat exchanger to secure the air conditioning capacity. Even if the above-mentioned conventional technology is used, the increase in the blowing noise due to the increase in the air volume due to the downsizing of the outdoor unit cannot be neglected from the viewpoint of noise pollution and the environment. Therefore, if the air flow is reduced and a heat exchanger corresponding to the reduced air flow is configured so that the noise does not become a problem as much as possible, for example, the first row counted from the upstream side of the heat exchanger is arranged on the entire rear surface of the unit, but the Is arranged in half of the entire rear surface of the unit, and the length of the heat exchanger upstream of the heat exchanger and the length of the heat exchanger downstream therefrom may differ. Since such a heat exchanger has a non-uniform ventilation resistance, even if the above-mentioned conventional technology is applied, the speed of the cooling air passing through the heat exchanger becomes non-uniform, and the performance of the heat exchanger is reduced. The ventilation noise of the heat exchanger increases.

[0007] An object of the present invention is to provide a heat exchanger inside an outdoor unit for an air conditioner, in which the length of the heat exchanger on the upstream side of the heat exchanger is different from the length of the heat exchanger on the downstream side thereof. The performance deterioration of the heat exchanger and the increase of the ventilation noise of the heat exchanger are caused by increasing the speed of the cooling air passing through the heat exchanger, thereby increasing the performance of the heat exchanger and the ventilation of the heat exchanger. An object of the present invention is to provide an outdoor unit for an air conditioner capable of reducing noise.

[0008]

In order to achieve the above object, a first outdoor unit for an air conditioner of the present invention has an axial fan at the center of the unit and an axial fan at the front of the unit. The bell mouth attached to the front panel
The unit has a heat exchanger assembly formed by stacking a flat heat exchanger on the inner surface of an L-shaped heat exchanger at the back of the unit, and the L-shaped heat exchanger forms the back surface and one side surface of the unit. The heat exchanger has a lateral length shorter than that of the rear part of the L-shaped heat exchanger and overlaps the rear part with the other end aligned with the side end of the rear part to heat the rotating shaft of the axial fan. In an outdoor unit for an air conditioner perpendicular to a ventilation surface of an exchanger assembly, an L-shaped air flow path is formed in the unit so as to face a side portion of the L-shaped heat exchanger and a part of a rear surface thereof. In addition, a partition-shaped wind flow guide which bends forward and passes beside the axial fan and bell mouth to reach the front panel is provided.

Further, the second outdoor unit for an air conditioner of the present invention is similar to the first outdoor unit for an air conditioner,
An axial flow fan, a bell mouth, a heat exchanger assembly comprising a flat heat exchanger superposed on the inner surface of an L-shaped heat exchanger, and a rotation axis of the axial flow fan and a ventilation surface of the heat exchanger assembly. A vertical unit, in which a L-shaped air flow path is formed facing the side surface of the L-shaped heat exchanger and a part of the rear surface thereof in the unit, and a forwardly extending from the bulkhead. A wind flow guide is provided which comprises a bent bell mouth that extends in a tapered manner and an end formed by extending the tip so as to follow the semicircular shape on the partition wall side of the outer circumference of the bell mouth.

Further, the third outdoor unit for an air conditioner of the present invention has the same structure as the first outdoor unit for an air conditioner,
An axial flow fan, a bell mouth, a heat exchanger assembly comprising a flat heat exchanger superposed on the inner surface of an L-shaped heat exchanger, and a rotation axis of the axial flow fan and a ventilation surface of the heat exchanger assembly. A vertically-oriented unit, wherein a partition wall forming an L-shaped air flow path faces a part of a side surface portion and a rear surface portion of an L-shaped heat exchanger in the unit, and a forward bend is formed from the partition wall portion. A first consisting of an extension that tapers down to the bellmouth
And a second airflow guide that tapers from three sides, the upper side, the other side, and the lower side, of the remaining part of the back portion and extends to the bell mouth, and the first airflow guide The two airflow guides are integrally formed so that the end of the extension and the end of the second airflow guide follow the outer circumference of the bell mouth.

Further, the fourth outdoor unit for an air conditioner of the present invention, like the first outdoor unit for an air conditioner,
An axial flow fan, a bell mouth, a heat exchanger assembly comprising a flat heat exchanger superposed on the inner surface of an L-shaped heat exchanger, and a rotation axis of the axial flow fan and a ventilation surface of the heat exchanger assembly. A vertical unit, in which a large amount of ventilation is provided over the entire surface of the L-shaped heat exchanger so as to cover the non-overlapping single-row portion of the flat plate heat exchanger on a side portion of the L-shaped heat exchanger and a part of the rear portion thereof. It is characterized in that a resistance plate with a hole is provided.

In a fifth outdoor unit for an air conditioner of the present invention, an axial fan is provided at the center of the unit, and a bell mouth mounted on a front panel facing the axial fan is provided at the front of the unit. At the back of the unit, there is provided a heat exchanger assembly formed by stacking a flat heat exchanger on the inner surface of an L-shaped heat exchanger, and the L-shaped heat exchanger forms the back and one side of the unit. In the outdoor unit for an air conditioner, the flat heat exchanger is shorter in the lateral direction than the rear part of the L-shaped heat exchanger and overlaps the rear part by aligning the other end with the side end of the rear part. The axial flow fan is arranged such that its rotating shaft is deflected from back to front from the side having a large number of heat exchangers to the side having a small number of heat exchangers so as to be inclined with respect to the ventilation surface of the heat exchanger assembly. .

[0013]

Embodiments of the present invention will be described below with reference to the drawings. <First Embodiment> FIG. 1 is a plan view showing the internal structure of an outdoor unit for an air conditioner according to a first embodiment of the present invention, and FIG. 2 is a perspective view. Outdoor unit 101 for air conditioner
The outer frame has a front panel 102 and one side panel 10
3, the top plate 105, the floor plate 106, the L-shaped upstream heat exchanger 120 forming the back surface and other side surfaces, and the heat exchanger 1
20 is a flat-plate downstream heat exchanger 1 that overlaps the inside of the back surface of the heat exchanger 20.
21. Hereinafter, the upstream heat exchanger 120
The combination of the heat exchanger and the downstream heat exchanger 121 is referred to as a heat exchanger assembly 114. The partition unit 109 is inside the outdoor unit 101.
As a result, the blowing machine room 107 and the compressor machine room 108
The blower machine room 107 occupies most of the inside, and the compressor system machine room 108 occupies only a triangular prism-shaped space that is tapered from the front to the rear on one side of the outer frame. A motor 112 is provided at the center of the blower
A propeller fan 110 is installed, a heat exchanger 114 is installed at the back, and a propeller fan 110 is installed at the front.
A bell mouth 111 having a concavity attached to the front panel 102 is provided at the front. The motor 112
Is held by a motor holder 113 attached to the floor plate 106.

One of the L-shaped heat exchangers 120 of the heat exchanger assembly 114 includes a back surface portion 120a and a side surface portion 120b which form the back surface and the other side surface of the outer frame, and the other plate-shaped heat exchanger 120. The exchanger 121 has a shorter lateral length than the rear part 120 a of the heat exchanger 120, and has one end aligned with one end of the rear part 120 a of the heat exchanger 120 and superimposed on the inside. In the outdoor unit 101, a partition-like airflow guide 115 which is a feature of this embodiment is provided with an L
The propeller fan 11 is bent further forward so as to form an L-shaped air flow path so as to face the side surface portion 120b of the heat exchanger 120 and a part of the rear surface portion 120a subsequent thereto.
0, it is provided so as to pass the side of the bell mouth 111 and reach the front panel 102. The wind guide 11
5 may be configured such that the guide start end is connected to the end of the side surface portion 120b or in the vicinity thereof to form an air flow path between the side surface portion 120b of the L-shaped heat exchanger and the entire panel. It may be configured to be connected to 102.

The wind 116 passing through the heat exchanger is constituted by the axial flow and the radial flow of the propeller fan 110. If the ventilation resistance of the heat exchanger is uniform, the velocity distribution of the wind passing through the heat exchanger will be uniform and will not impair the performance of the heat exchanger, but as shown in FIG. Since the length of the heat exchanger 120 and that of the downstream heat exchanger 121 are different, the ventilation resistance of the heat exchanger assembly 114 combining the two heat exchangers is small in the portion where the number of heat exchanger rows is small, A portion having a large number of rows has a large ventilation resistance, the entire surface is not uniform, and the velocity distribution of the wind passing through the heat exchanger assembly 114 is such that a portion having a small number of rows has a large wind speed and a large number of rows. The wind speed is low in the part, and becomes uneven, and the heat exchanger assembly 11
4 is significantly impaired, and the ventilation noise of the heat exchanger assembly 114 is also increased. Therefore, as shown in FIG. 1, by providing the wind flow guide 115 to a portion where the number of heat exchanger rows is small, the radial flow of the propeller fan 110 is suppressed,
By reducing the wind speed in this portion (small air volume) and increasing the wind speed in the portion having a large number of heat exchanger rows by the wind flow guide 115 (high air volume), the speed distribution of the heat exchanger assembly is made uniform. In addition, the performance of the heat exchanger assembly is improved, and the ventilation noise of the heat exchanger assembly is reduced. In addition, this type of wind flow guide is not limited to a heat exchanger assembly in which an L-shaped heat exchanger and a plate-shaped heat exchanger are stacked, but a heat exchanger assembly in which the number of rows of heat exchangers is partially different. And, of course, can be applied.

<Embodiment 2> FIG. 3 is a configuration diagram of an outdoor unit for an air conditioner according to Embodiment 2 of the present invention.
In the outdoor unit shown in FIG. 1, the partition plate 109 is removed to reduce the unit internal space to one. Also in this case, if the wind flow guide 115 shown in FIG. 1 is provided for a portion having a small number of heat exchanger rows, the performance of the heat exchanger assembly is improved by uniformizing the wind speed distribution in the heat exchanger assembly. Also, ventilation noise can be reduced. Each of the upstream heat exchanger 120 and the downstream heat exchanger 121 is provided with a side surface indicated by a chain line on one side (the right side in the figure), and when these side surfaces are shorter than the other side surface 120b, It is preferable to provide a wind guide 115 as shown in FIG.

<Embodiment 3> FIG. 4 is a view showing the configuration of an outdoor unit for an air conditioner according to Embodiment 3 of the present invention. This outdoor unit has the same configuration as the outdoor unit of Embodiment 1 (FIG. 1) except that the partition plate 109 is removed and the shape of the airflow guide 115 is different. That is, the outer frame of the outdoor unit includes the front panel 102, the side panel 103, the top panel 105, and the floor panel 10.
6. The heat exchanger assembly 114 includes an L-shaped heat exchanger 120 and a flat heat exchanger 121, and the like. Inside the outdoor unit, a propeller fan 110 with a motor 112 is provided at the center, a heat exchanger 114 is provided at the back, and a bell mouth 111 having a concavity attached to the front panel 102 is provided at the front. ing. Heat exchanger assembly 11
One of the L-shaped heat exchangers 120 has a back surface 120a and a side surface 120a that form the back surface and the other side surface of the outer frame.
b, the other plate-shaped heat exchanger 121 has a shorter lateral length than the back part 114a of the heat exchanger 120, and has one end aligned with one end of the back part 120a of the heat exchanger 120 and Has been superimposed.

In this outdoor unit, the bent portion of the airflow guide 115 in the outdoor unit shown in FIG. By providing roundness (R) at the bend of the wind flow guide 115, the flow along the wind flow guide 115 is smoothed, and the performance of the heat exchanger assembly is improved by uniformizing the wind velocity distribution in the heat exchanger assembly. In addition to reducing ventilation noise, wind noise and fluid noise generated from the wind flow guide 115 can be reduced.

<Embodiment 4> FIG. 5 is a diagram showing the configuration of an outdoor unit for an air conditioner according to Embodiment 4 of the present invention. This outdoor unit employs a wind flow guide having a different shape from the illustrated wind flow guide 115 in the outdoor unit of the third embodiment shown in FIG. Similar to the third embodiment, the airflow guide 115 forms an L-shaped airflow channel as a partition wall, facing the side surface portion 120b of the L-shaped heat exchanger 120 and a part of the rear surface portion 120a subsequent thereto. The airflow guide 115 is further bent forward as an extension and its tip extends to the vicinity of the bell mouth 111, and the tip of the extension is attached to the bell mouth 1.
11 is different from the airflow guide shown in FIG. 3.

In the air flow guide shown in FIGS. 1 to 4, the flow along the air flow guide collides with the front panel, but according to the air flow guide in the fourth embodiment shown in FIG. As well as improving the performance of the heat exchanger assembly by reducing the velocity distribution of the wind in the heat exchanger assembly and reducing the ventilation noise, the wind noise generated from the wind flow guide as compared with those shown in FIGS. Fluid noise can be reduced.

<Embodiment 5> FIG. 6 is a view showing the configuration of an outdoor unit for an air conditioner according to Embodiment 5 of the present invention. This outdoor unit is a wind flow guide 1 shown in FIG.
Reference numeral 15 indicates a case using wind flow guides having different shapes. The air flow guide 115 serves as a partition wall, and includes a side surface portion 120b of the L-shaped heat exchanger 120 and a rear surface portion 1 subsequent thereto.
An L-shaped wind channel is formed to face a part of 20a, and it is bent forward as an extension, and the vertical cross section tapers in an arc-shaped curved surface toward the lateral half (the left half in FIG. 6) of the outer periphery of the bell mouth 111. Has become.

As described above, the bellows 11
1 has a substantially semi-cylindrical shape and is tapered toward the outer periphery thereof, and its inner surface is a smooth curved surface. Therefore, the uniformity of the wind speed distribution in the heat exchanger assembly improves the heat exchanger assembly performance and improves ventilation. The wind flow guide 1 shown in FIG.
Further, wind noise and fluid noise generated from the wind flow guide can be reduced.

<Embodiment 6> FIG. 7 is a diagram showing a configuration of an outdoor unit for an air conditioner according to Embodiment 6 of the present invention. The difference between this outdoor unit and that shown in FIG. 6 is the shape of the airflow guide 115. The airflow guide 115 according to the sixth embodiment is a part of the airflow guide according to the fifth embodiment described above, and the edge of the surface tapered toward the outer periphery of the bell mouth 111 on the top plate 105 side and the floor plate 106 side Are vertically extended to the top plate and the floor plate, respectively.

Thus, the rear side 12 of the surface that tapers toward the outer periphery of the bell mouth 111 of the airflow guide.
The wind flow does not enter the heat exchanger assembly 2 and the heat exchanger assembly performance is improved and the ventilation noise is reduced by uniformizing the wind speed distribution in the heat exchanger assembly. The generated wind noise and fluid noise can be reduced. In addition, a pillar called an airflow guide is formed between the unit top plate and the floor plate, and the strength of the outdoor unit is also improved.

<Seventh Embodiment> FIG. 8 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a seventh embodiment of the present invention. The outdoor unit includes a bell mouth 1 from a heat exchanger side end face 123 on the side where the number of heat exchanger rows is large, in addition to a wind flow guide 115 as a first wind flow guide shown in FIG.
A further airflow guide 124 which extends in a substantially semi-cylindrical shape and tapers toward the other half of the outer periphery of the airflow guide 11;
And 124, and a tapered cylindrical wind flow guide provided with a guide lower plate 126 that closes the opening between the lower edges of the wind flow guides 115 and 124. Have.
Here, the airflow guide 124, the upper guide plate 125, and the lower guide plate 126 constitute a second airflow guide.

As a result, all the wind flowing from the heat exchanger assembly smoothly flows along the wind flow guide, and the uniformity of the wind velocity distribution in the heat exchanger assembly improves the performance of the heat exchanger assembly and improves ventilation. Along with the reduction of the noise, it is possible to further reduce the wind noise and the fluid noise generated from the airflow guide as shown in FIG.

<Eighth Embodiment> FIG. 9 is a diagram showing a configuration of an outdoor unit for an air conditioner according to an eighth embodiment of the present invention. This indoor unit is different from the outdoor unit of the sixth embodiment shown in FIG. 7 in that, in addition to the wind flow guide 115 covering half of the outer periphery of the bell mouth 111, the bell mouth 1
11 is provided with another airflow guide 124 covering the other half of the outer circumference. The combination of the airflow guides 115 and 124 is similar to the airflow guide shown in FIG. The airflow guide 124 is tapered and extends from the side end face 123 on the side of the heat exchanger assembly 114 where the number of heat exchanger rows is large to the other half of the outer periphery of the bell mouth 111, and is tapered. The edge of the surface on the top plate 105 side and the edge on the floor plate 106 side are vertically extended to the top plate and the floor plate, respectively.

This prevents the wind flow from entering the back side 122 of the surface of the wind flow guide that tapers toward the outer periphery of the bell mouth, and the heat generated by the uniformized wind speed distribution in the heat exchanger assembly. Along with improving the performance of the exchanger assembly and reducing the ventilation noise, the outdoor unit shown in FIG. 7 can reduce wind noise and fluid noise generated from the airflow guide. In addition, a column called a wind flow guide is formed between the unit top plate and the floor plate, and the unit strength is also improved.

<Embodiment 9> FIG. 10 is a diagram showing a configuration of an outdoor unit for an air conditioner according to Embodiment 9 of the present invention. This indoor unit has an airflow guide 115 provided from the heat exchanger end face 117 on the side where the number of heat exchangers is small, and another air flow guide provided from the end face of the heat exchanger on the side where the number of heat exchangers is large. The two wind flow guides 124 are integrated, and are tapered and stretched from the heat exchanger side toward the outer periphery of the bell mouth 111. In other words, the airflow guide 115 (first airflow guide) forms an L-shaped air flow channel as a partition wall facing the side surface portion 120b of the L-shaped heat exchanger 120 and a part of the rear surface portion 120a following the same. It is bent and extended forward, and its vertical cross-section is tapered in the shape of an arcuate curved surface toward a quarter of the outer circumference of the bell mouth 111. Another wind flow guide 124 (second wind flow guide) is a bell mouth 111 from the upper side, the side and the lower side of the heat exchanger group 114 on the side where the number of heat exchanger rows is large.
The vertical cross-section of the outer circumference of the tapered portion is formed into an arc-shaped curved surface toward the remaining 3/4 of the circumference, and the wind flow guide 11 is formed.
5 smoothly connected to the tapered extension.

As a result, all the wind flowing from the heat exchanger assembly 114 into the unit is controlled by the wind flow guide (11).
5, 124), and the tapered stretched surface is smooth and has no edges. Therefore, the uniformity of the wind speed distribution in the heat exchanger assembly improves the heat exchanger performance and reduces ventilation noise. At the same time, it is possible to further reduce wind noise and fluid noise generated from the wind flow guide as compared with the wind flow guide having an edge shown in FIG.

<Tenth Embodiment> FIG. 11 is a sectional view of an outdoor unit for an air conditioner according to a tenth embodiment of the present invention. The air conditioner outdoor unit 101 has an outer frame having a front panel 102, one side panel 103, and a top panel 10.
5, a floor plate 106, an L-shaped heat exchanger 120 forming the back surface and other side surfaces, and a flat heat exchanger 121 overlapping the inside of the back surface of the heat exchanger 120. The interior of the outdoor unit 101 is divided by a partition plate 109 into a blower machine room 107 and a compressor machine room 108,
A propeller fan 110 with a motor 112 is installed at the center, a heat exchanger assembly 114 composed of heat exchangers 120 and 121 is installed at the back, and a propeller Front panel 1 in front of fan 110
A bell mouth 111 having a concavity attached to the front end 02 is provided. L of one of the heat exchanger assemblies 114
The heat exchanger 120 has a rear surface 120a and a side surface 120b that form the rear surface and the other side surface of the outer frame, and the other flat heat exchanger 121 has a lateral side from the rear surface 120a of the heat exchanger 120. The length in the direction is short, and one end is aligned with one end of the back surface portion 120a of the heat exchanger 120 and is superposed inside.

The resistance plate 2 which is a feature of the present embodiment is
01 is installed inside the unit so as to cover the side surface portion 120b of the L-shaped heat exchanger 120 and a part of the rear surface portion 120a (a single-row portion having a small number of heat exchanger rows). The resistance plate 201 has many ventilation holes on the plate surface. The ventilation resistance of the resistance plate is equal to the sum of the ventilation resistance of the heat exchanger with a small number of heat exchanger rows (single row part) and the resistance plate of the resistance plate, and the ventilation resistance of the heat exchanger with a large number of rows (multiple row part). The configuration is as follows. Thereby, the ventilation resistance of the entire heat exchanger assembly becomes uniform, and the velocity distribution of the wind passing through the heat exchanger assembly becomes uniform, so that the performance of the heat exchanger assembly can be improved.

FIG. 12 is a perspective view of the resistance plate 201. The resistance plate 201 is disposed as shown in FIG. 11, and the sum of the ventilation resistance of the heat exchanger having a small number of heat exchanger rows and the ventilation resistance of the resistance plate is equal to the ventilation resistance of the heat exchanger having a large number of heat exchanger rows. It is configured by opening the resistance adjusting hole 204 and applying a resistance.
The resistance plate 201 is attached to the heat exchanger by attachment pieces having fixing screw holes 205 provided at corners and sides of the resistance plate. The shape of the resistance adjustment hole is circular 206, triangle 20
7, a rectangular shape 208, a pentagonal shape 209, a hexagonal shape 210, or an octagonal shape 211, and any shape is selected so as to have a required resistance value, and the size and the number of resistance adjusting holes are also determined.

FIG. 13 is a view showing a case where the resistance adjusting holes of the resistance plate of the present invention shown in FIG. 12 can be adjusted. Resistance plate 2
01 selects the shape so that the required resistance value is obtained, and also determines the size and the number of the resistance adjusting holes 204. In order to provide versatility, the shape, size and number of the resistance adjusting holes are determined in advance. A shutter 213 provided in the resistance adjusting hole so as to have a predetermined resistance value is determined in advance.
It is configured to be adjustable with. The shutter is constituted by a slide shutter 214, a stepped slide shutter 215, or a bellows-type shutter 216 as shown in the detailed view of the section B. The resistance adjustment lever 211 can adjust the resistance of the shutter provided in the resistance adjustment hole for each row, or the shutter provided in the resistance adjustment hole can adjust the resistance one by one.

<Embodiment 11> FIG. 14 shows a case where a resistance plate 201 of the present invention whose resistance can be adjusted is provided on the entire surface of a downstream side 217 of a heat exchanger. In order to make the resistance plate versatile, the resistance plate is provided on the entire downstream side of the heat exchanger.

<Twelfth Embodiment> FIG. 15 is a view showing a case where a resistance plate 201 of the present invention whose resistance can be adjusted is provided on the entire surface of an upstream side 218 of a heat exchanger. In order to make the resistance plate versatile, the resistance plate is provided on the entire surface on the upstream side of the heat exchanger.
FIG. 16 is a diagram showing a resistance-adjustable resistance plate 201 covering the entire upstream or downstream side of the heat exchanger assembly shown in FIGS. This resistance plate 201 has a resistance adjustment hole on the side 219 having a large number of heat exchanger rows fully opened, and a side 220 having a small number of rows of heat exchangers.
The resistance adjusting holes are configured to adjust the shutter 213 so that the resistance on the side with a smaller number of rows is equal to the resistance on the side with a larger number of rows. Since the ventilation resistance can be adjusted, if all the shutters are fully opened, it can be used for outdoor units for air conditioners with a fixed number of heat exchanger rows.

FIG. 17 is a diagram showing the resistance net 301 of the present invention disposed on a part of the inner surface of the heat exchanger assembly. Resistance net 301
Is the end face 203 on the side with a small number of rows from the heat exchanger end face 202 at the boundary between the side with a large number of heat exchangers and the side with a small number of rows.
And along the shape of the heat exchanger.
That is, the resistance network 301 covers a portion of the heat exchanger assembly where the number of heat exchanger rows is small. The effect of the resistance network is the same as that of the resistance plate, and the ventilation resistance of the entire heat exchanger assembly becomes uniform, and the velocity distribution of the wind passing through the heat exchanger assembly becomes uniform. Performance can be improved. The enlarged view of the part C shows the mesh shape of the resistance net. The resistance net has a mesh shape of any one of a circle 303, a triangle 304, a square 305, a pentagon 306, a hexagon 307, and an octagon 308.

<Thirteenth Embodiment> FIG. 18 is a sectional view of an outdoor unit for an air conditioner according to a thirteenth embodiment of the present invention. This outdoor unit is arranged on its outer surface so that the resistance net 301 also serves as a protection net for the heat exchanger assembly 114. In this case, in order to equalize the ventilation resistance of the heat exchanger assembly, a fine resistance network is provided on the side 220 having a small number of heat exchanger rows, or a coarse resistance network used on the side having a large number of rows is used. Are stacked.

Fourteenth Embodiment FIG. 19 is a sectional view of an outdoor unit for an air conditioner according to a fourteenth embodiment of the present invention. In this outdoor unit, a propeller fan is disposed obliquely with respect to the ventilation surface of the heat exchanger assembly. The outer frame of the outdoor unit has a front panel 102, one side panel 103, a top plate 105,
The outdoor unit 101 includes a floor plate 106, an L-shaped heat exchanger 120 forming the back surface and other side surfaces, and a flat heat exchanger 121 overlapping the inside of the back surface of the heat exchanger 120. The plate 109 is divided into a blower machine room 107 and a compressor machine room 108. In the center of the blower machine room 107, a propeller fan 110
Is installed such that its rotation axis is deflected from the rear side to the front side from the side where the number of heat exchanger rows is large to the side where the number is small, and is inclined with respect to the ventilation surface of the heat exchanger assembly. Along with this, the bell mouth 111 in front of the propeller fan 110 is also attached to the front panel 102 with its axis aligned with the axial direction of the propeller fan 110 and the shape is changed to be oblique.

As a result, the wind flow 402 around the propeller fan moves to the side where the number of heat exchanger rows is large, and the velocity distribution of the wind passing through the heat exchanger assembly 114 is directed in a uniform direction. The performance of the assembly can be improved.

FIG. 20 shows a heat exchanger according to the present invention. As shown in the enlarged view of the part D and the enlarged view of the part E, the fin-to-fin spacing 502 (fin pitch) is installed on the side 219 where the number of rows of heat exchangers is large, and is installed so as to cross the heat transfer tubes extending in the lateral direction and parallel to each other. And the ventilation resistance on the side with the larger number of rows is configured to be equal to the ventilation resistance on the side with the smaller number of rows. As a result, the ventilation resistance of the entire heat exchanger assembly becomes uniform,
Since the velocity distribution of the wind 302 passing through the heat exchanger becomes uniform, the performance of the heat exchanger can be improved. This heat exchanger is applied to the outdoor unit for an air conditioner of each of Embodiments 1 to 14 described above.

Sixteenth Embodiment FIG. 21 is a sectional view of an air conditioner outdoor unit according to a sixteenth embodiment of the present invention. This outdoor unit is a combination of a propeller fan arranged obliquely as shown in FIG. 19 and a heat exchanger assembly with fin intervals changed as shown in FIG.
By combining the two inventions, the ventilation resistance of the entire heat exchanger assembly becomes uniform, and the velocity distribution of the wind passing through the heat exchanger assembly becomes uniform, thereby improving the performance of the heat exchanger assembly. be able to.

[0043]

According to the present invention, a bell mouth having an outdoor unit for an air conditioner, an axial fan in the center of the unit, and a front panel mounted on a front panel facing the axial fan in the front,
On the back, there is provided a heat exchanger assembly comprising an L-shaped heat exchanger and a flat heat exchanger superimposed, and the L-shaped heat exchanger forms the back and one side of the unit and is a flat heat exchanger. Is partially overlapped with the other end on the back side of the L-shaped heat exchanger,
In an outdoor unit for an air conditioner in which the rotation axis of the axial flow fan is perpendicular to the ventilation surface of the heat exchanger assembly, L
In order to form an L-shaped flow path opposite to the side part of the heat exchanger and the part of the rear part following the same, it is further bent forward and extended to pass through the bell mouth and reach the front panel. Since the wind flow guide is provided, the wind passing through a part of the side surface and the back surface of the L-shaped heat exchanger which is a single row portion of the heat exchanger assembly is decelerated by the wind flow guide. By approaching the velocity of the wind passing through the double part where the rear part of the L-shaped heat exchanger and the flat heat exchanger overlap, the distribution of the wind velocity passing through the heat exchanger assembly can be made uniform, This has the effect of improving the performance of the exchanger assembly and reducing ventilation noise.

Further, the tip of the extended portion of the airflow guide may be formed along the outer circumference of the bell mouth, or the outer circumference of the bell mouth may be further extended from the upper side, the other side, or the lower side of the heat exchanger assembly. The above effect can be obtained by adding another flow guide extending to a circle, or by covering a part of the side surface and the back surface of the L-shaped heat exchanger with a resistance plate having many ventilation holes. . In addition, the above-described effect can be obtained by arranging the axial fan so that its rotation axis is inclined from the rear side to the front side from the side where the number of heat exchanger rows is large to the side where the number is small and inclined with respect to the ventilation surface of the heat exchanger assembly. Can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of an outdoor unit for an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a partial perspective view showing the configuration of the outdoor unit for an air conditioner according to the first embodiment.

FIG. 3 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a second embodiment of the present invention.

FIG. 4 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a third embodiment of the present invention.

FIG. 5 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a fourth embodiment of the present invention.

FIG. 6 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a fifth embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a sixth embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a seventh embodiment of the present invention.

FIG. 9 is a diagram showing a configuration of an outdoor unit for an air conditioner according to an eighth embodiment of the present invention.

FIG. 10 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a ninth embodiment of the present invention.

FIG. 11 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a tenth embodiment of the present invention.

FIG. 12 is a perspective view showing a shape of a resistance plate used in the outdoor unit according to the tenth embodiment.

FIG. 13 is a perspective view showing the structure of another resistance plate used in the outdoor unit of the tenth embodiment.

FIG. 14 is a diagram showing a configuration of an outdoor unit for an air conditioner according to Embodiment 11 of the present invention.

FIG. 15 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a twelfth embodiment of the present invention.

FIG. 16 is a perspective view showing the shape of a resistance plate used in the outdoor units according to the eleventh and twelfth embodiments.

FIG. 17 is a diagram showing a resistance network used for the outdoor unit according to the tenth embodiment.

FIG. 18 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a thirteenth embodiment of the present invention.

FIG. 19 is a diagram showing a configuration of an outdoor unit for an air conditioner according to a fourteenth embodiment of the present invention.

FIG. 20 is a diagram showing a heat exchanger assembly in which two types of heat exchangers having different fin intervals are stacked and combined.

FIG. 21 is a diagram showing a configuration of an outdoor unit for an air conditioner according to Embodiment 15 of the present invention.

[Explanation of symbols]

 Reference Signs List 101 Outdoor unit for air conditioner 102 Front panel 103 Side panel 105 Top plate 106 Floor plate 107 Ventilation system room 108 Compressor system room 109 Partition plate 110 Propeller fan 111 Bellmouth 112 Motor 115 Flow guide 116 Pass through heat exchanger Wind 120 Upstream heat exchanger 120a Back surface 120b Side surface 121 Downstream heat exchanger 124 Wind flow guide 125 Upper guide plate 126 Lower guide plate 201 Resistance plate 204 Resistance adjustment hole 212 Resistance adjustment lever 213 Shutter 214 Sliding shutter 215 steps Slide type shutter 216 Bellows type shutter 301 Resistance net 401 Propeller fan rotation axis 501 Fin 502 Distance between fins (fin pitch)

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Ryoji Sato 4-6 Kanda Surugadai, Chiyoda-ku, Tokyo Inside the Air Conditioning Systems Division, Hitachi, Ltd. (72) Inventor Hiroyasu Yoneyama 4-6 Kanda Surugadai, Chiyoda-ku, Tokyo Hitachi, Ltd. Air Conditioning Systems Division (72) Inventor Hideki Okuzono 4-6, Kanda Surugadai, Chiyoda-ku, Tokyo Tokyo, Japan Inside (72) Inventor Takeshi Moriya 4--6, Kanda Surugadai, Chiyoda-ku, Tokyo Address: Hitachi, Ltd. Air Conditioning Systems Division (72) Inventor: Shinichi Shimode 502, Kandate-cho, Tsuchiura-shi, Ibaraki Pref. F-term (in reference) in Machine Research Laboratory, Hitachi Ltd. 3L054 BA03 BA05 BB01 BB03

Claims (5)

[Claims] 1. An axial fan at the center of the unit, a bell mouth mounted on the front panel facing the axial fan at the front of the unit, and a flat plate on the inner surface of the L-shaped heat exchanger at the back of the unit. Wherein the L-shaped heat exchanger forms the back surface and one side surface of the unit, and the flat heat exchanger has the L-shaped heat exchanger. The lateral length is shorter than the rear part of the exchanger and the other end is aligned with the side end of the rear part and overlaps with the rear part, and the rotation axis of the axial fan is connected to the ventilation surface of the heat exchanger assembly. In the vertical outdoor unit for an air conditioner, the unit is further bent forward so as to form an L-shaped air flow path in the unit so as to form a L-shaped air flow passage facing a side portion and a part of a rear surface portion of the L-shaped heat exchanger. The front panel, passing beside the axial fan and the bell mouth Outdoor unit for an air conditioner which is characterized in that a partition wall-like air flow guide to reach. 2. An axial fan at the center of the unit, a bell mouth mounted on the front panel facing the axial fan at the front of the unit, and a flat plate on the inner surface of the L-shaped heat exchanger at the back of the unit. Wherein the L-shaped heat exchanger forms the back surface and one side surface of the unit, and the flat heat exchanger has the L-shaped heat exchanger. The lateral length is shorter than the rear part of the exchanger and the other end is aligned with the side end of the rear part and overlaps with the rear part, and the rotation axis of the axial fan is connected to the ventilation surface of the heat exchanger assembly. In a vertical outdoor unit for an air conditioner, a partition wall portion that forms an L-shaped air flow path facing a part of a side surface portion and a subsequent rear surface portion of the L-shaped heat exchanger in the unit, and Then bend forward and taper to the bell mouth and extend Outdoor unit for an air conditioner which is characterized in that a wind flow guide comprising a molded extension so as to extend along the semicircular shape of the partition wall side of the outer peripheral circle of the bell mouth. 3. An axial fan at the center of the unit, a bell mouth mounted on the front panel facing the axial fan at the front of the unit, and a flat plate on the inner surface of the L-shaped heat exchanger at the back of the unit. Wherein the L-shaped heat exchanger forms the back surface and one side surface of the unit, and the flat heat exchanger has the L-shaped heat exchanger. The lateral length is shorter than the rear part of the exchanger and the other end is aligned with the side end of the rear part and overlaps with the rear part, and the rotation axis of the axial fan is connected to the ventilation surface of the heat exchanger assembly. In the vertical outdoor unit for an air conditioner, a partition wall portion forming an L-shaped air flow path facing a side portion of the L-shaped heat exchanger and a part of a rear surface portion following the L-shaped heat exchanger inside the unit, and Bend forward and extend tapering to the bellmouth A first airflow guide comprising: a second airflow guide tapering and extending from three sides of an upper side, another side and a lower side of the remaining part of the back surface portion to the bell mouth; The two airflow guides are integrally formed so that the end of the extension of the first airflow guide and the end of the second airflow guide follow the outer circumference of the bell mouth. Outdoor unit for harmonizer. 4. An axial fan at the center of the unit, a bell mouth mounted on the front panel facing the axial fan at the front of the unit, and a flat plate on the inner surface of the L-shaped heat exchanger at the back of the unit. Wherein the L-shaped heat exchanger forms the back surface and one side surface of the unit, and the flat heat exchanger has the L-shaped heat exchanger. The lateral length is shorter than the rear part of the exchanger and the other end is aligned with the side end of the rear part and overlaps with the rear part, and the rotation axis of the axial fan is connected to the ventilation surface of the heat exchanger assembly. In a vertical outdoor unit for an air conditioner, a side portion of the L-shaped heat exchanger and a part of a rear surface following the L-shaped heat exchanger in the unit cover a non-overlapping single-row portion of the flat plate heat exchanger. That the resistance plate with many ventilation holes Outdoor unit for an air conditioner according to symptoms. 5. An axial fan at the center of the unit, a bell mouth mounted on the front panel facing the axial fan at the front of the unit, and an L-shaped heat exchanger on the back of the unit. A heat exchanger assembly comprising a stack of flat heat exchangers, wherein the L-shaped heat exchanger forms the back and one side of the unit;
In the outdoor unit for an air conditioner, the lateral length of which is shorter than the rear part of the U-shaped heat exchanger and the other end is aligned with the side end of the rear part and overlaps the rear part, the axial fan is provided. An outdoor unit for an air conditioner, wherein a rotating shaft is arranged so as to be deflected from a rear side to a front side from a side having a large number of heat exchanger rows to a side having a small number thereof and inclined with respect to a ventilation surface of a heat exchanger assembly. .