JPH10141686A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact air conditioner having high heat exchange efficiency by reducing disorder of the sucked air and decreasing noise. SOLUTION: A turbo-fan 26 sucks the air from axial forward through a circular suction port 27, and radially outward diffuses it. A circular heat exchanger 11 is disposed forward of the fan 26, and disposed substantially concentrically with the port 27. A bell mouth 28 is disposed between the exchanger 11 and the fan 26. An outer diameter of the exchanger 11 is substantially equal to or larger by a predetermined size than that of a circular inlet 21 of the bell mouth 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separate type or integrated type air conditioner.

[0002]

2. Description of the Related Art Recently, a thin-type air conditioner, for example, an indoor unit using a turbo fan has been proposed.

This air conditioner is provided with a rectangular heat exchanger 1 as shown in FIG. The heat exchanger 1 is provided between a pair of headers 2 and 3 provided in parallel up and down, serpentine tubes 5 and 6 connecting the upper and lower headers 2 and 3, and between the serpentine tubes 5 and 6. (Not shown). Although not shown, a turbo fan that sucks air from the front in the axial direction and blows the air outward in the radial direction is provided behind the heat exchanger 1.
The suction port 7 of the turbo fan has a circular shape as shown by a broken line.

[0004]

By the way, in the air conditioner using the turbo fan, as shown in FIG. 5, the heat exchanger 1 has a rectangular shape, whereas the suction port 7 of the turbo fan has a rectangular shape. It is circular.

Therefore, the resistance of the air flowing through the central portion corresponding to the suction port 7 of the rectangular heat exchanger 1 is small,
The passage resistance of the air passing through the four corners C and the outer edge of the heat exchanger 1 is large. Therefore, the flow velocity of the air flowing from the rectangular heat exchanger 1 to the suction port 7 of the turbofan is
Depending on which part of the rectangular heat exchanger 1 has passed, there is a problem that a difference in flow velocity occurs, the flow is disturbed, and large-band noise is generated.

[0006] Further, since the air does not easily flow in the corner portion C of the rectangular heat exchanger 1, there is a problem that the efficiency of heat exchange is low and the efficiency of the entire heat exchanger 1 is low.

[0007] Also, from a different point of view, the corner portion C of the rectangular heat exchanger 1 occupies a space without effectively contributing to heat exchange. There is a problem that can not be achieved.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a compact air conditioner capable of reducing the turbulence of the flow of intake air, reducing noise, and having high heat exchange efficiency.

[0009]

According to a first aspect of the present invention, there is provided an air conditioner comprising: a turbocharger for sucking air from a front side in an axial direction through a circular inlet and blowing air outward in a radial direction; It is characterized by comprising a fan and a circular heat exchanger disposed in front of the turbofan and substantially concentric with the circular suction port of the turbofan.

According to the air conditioner of the first aspect of the present invention, the circular heat exchanger and the circular suction port of the turbo fan are arranged concentrically. Therefore, the air passing through each part of the circular heat exchanger smoothly flows toward the circular suction port of the turbofan, and the difference between the flow velocities of the respective air flows becomes small. Therefore, turbulence does not easily occur in the flow of air from the circular heat exchanger to the turbofan, and noise is reduced. In other words, since the circular heat exchanger and the circular suction port are concentric, the passage resistance of each flow from each part of the circular heat exchanger to the circular suction port of the turbofan becomes substantially equal, so that each air flow The difference between the flow velocities becomes smaller, and turbulence hardly occurs.

Further, since the heat exchanger has a circular shape corresponding to the circular suction port of the turbofan, air flows smoothly through all the parts of the circular heat exchanger, and Efficiency is increased.

Further, since the circular heat exchanger has almost no portion that does not contribute to heat exchange, the whole air conditioner can be made compact.

An air conditioner according to a second aspect of the present invention is the first aspect.
In the air conditioner according to the above, a bell mouth is arranged between the circular suction inlet of the turbo fan and the circular heat exchanger, and the outside diameter of the circular inlet of the bell mouth is the circular heat exchange. The outer diameter of the heat exchanger is substantially equal to or smaller than the outer diameter of the circular heat exchanger by a predetermined dimension.

According to the air conditioner of the second aspect of the present invention, the outer diameter of the circular inlet of the bell mouth is substantially equal to the outer diameter of the circular heat exchanger, or the circular heat exchanger is provided. Since the outside diameter of the heat exchanger is smaller than the outer diameter of the heat exchanger by a predetermined dimension, all the air passing through the circular heat exchanger is smoothly guided into the circular inlet of the bell mouth and reaches the circular inlet of the turbofan. As described above, by providing the bell mouth, air from the circular heat exchanger can be smoothly guided to the circular inlet of the bell mouth which is larger than the suction port of the turbofan. Therefore, the turbulence of the air flow is less likely to occur, and the noise is reduced.In addition, the outer diameter of the circular heat exchanger can be increased according to the size of the bell mouth circular inlet. it can. That is,
The heat exchange area of the circular heat exchanger can be increased to increase the heat exchange capacity.

The air conditioner according to the third aspect of the present invention is the first aspect of the present invention.
Or the air conditioner according to 2, wherein the circular heat exchanger includes a serpentine tube and fins, and the envelope of the serpentine tube is substantially circular.

According to the air conditioner of the third aspect of the present invention, since the circular heat exchanger is of a serpentine tube type, the meandering width of the serpentine tube is large at the center portion and is large at the end portions. It can be made smaller so that the envelope of the serpentine tube is substantially circular. That is, the circular heat exchanger can be manufactured simply and at low cost.

An air conditioner according to a fourth aspect of the present invention is the first aspect.
In the air conditioner according to any one of Items 3 to 3, the circular heat exchanger is connected to the branching device by a plurality of branch pipes, and the branch pipes are curved in an arc shape to form an outer periphery of the circular heat exchanger. It is characterized by being arranged along.

According to the air conditioner of the fourth aspect of the present invention, the branch pipe is curved in an arc shape and arranged along the outer periphery of the circular heat exchanger. There is no wasted space between the pipes and the air conditioner as a whole becomes compact.

An air conditioner according to a fifth aspect of the present invention is the first aspect of the present invention.
3. The air conditioner according to any one of 1 to 3, wherein the circular heat exchanger includes a header, a heat exchange tube provided between the headers, and a fin provided between the heat exchange tubes. That is, the refrigerant pipe connected to the header is curved in an arc shape and is arranged along the outer periphery of the circular heat exchanger.

According to the air conditioner of the fifth aspect of the present invention, since the refrigerant pipe is curved in an arc shape and arranged along the outer periphery of the circular heat exchanger, the circular heat exchanger and the refrigerant are arranged. There is no wasted space between the pipes and the whole air conditioner becomes compact.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIG. 1 is a front view of a circular heat exchanger of an indoor unit of an air conditioner according to this embodiment, and FIG. 2 is a sectional view of the indoor unit.

As shown in FIG. 1, the circular heat exchanger 11 comprises:
Serpentine tubes 12 and 13 and upper short header 1
5, lower long header 16 and serpentine tube 1
And fins (not shown) provided in the tubes 2 and 13. The serpentine pipes 12 and 13 have a large vertical meandering width at a central portion connected to the upper header 15 and a vertical meandering width at left and right end portions connected to the lower header 16. Is small, and the entire envelope of the serpentine tubes 12 and 13 is substantially circular. Although not shown, fins are provided between the serpentine tubes 12 and 13. A liquid-side refrigerant pipe 18 is connected to the upper header 15, and a gas-side refrigerant pipe 19 is connected to the lower header 16.

On the other hand, as shown in FIG. 2, the circular heat exchanger 11 is arranged in front of the turbo fan 26, and the circular suction port 27 of the turbo fan 26 and the circular heat exchanger 11
And are arranged substantially concentrically. The turbo fan 26 sucks air from the front in the axial direction through the suction port 27 and blows the air outward in the radial direction. A bell mouth 28 is provided between the circular heat exchanger 11 and the turbo fan 26. As shown in FIGS. 1 and 2, the circular mouth 21 of the bell mouth 28 is substantially concentric with the circular heat exchanger 11 and has an outer diameter slightly smaller than the outer diameter of the circular heat exchanger 11. It has a shape. As shown in FIG. 2, the rear end of the bell mouth 28, that is, the outlet,
Is inside. The bell mouth 28 is fixed to the casing 25 by a partition plate 29. The casing 25 houses the circular heat exchanger 11, the bell mouth 28, and the turbo fan 26.

In the indoor unit having the above configuration, when the turbo fan 26 rotates, the air heat exchanged by the circular heat exchanger 11 passes through the bell mouth 28 and the circular suction port 27 of the turbo fan 26, and Is blown radially outward.

At this time, as shown in FIGS. 1 and 2, the circular heat exchanger 11, the circular inlet 21 of the bell mouth 28, and the circular inlet 27 of the turbo fan 26 are substantially concentric, and Since the circular inlet 21 of the bell mouth 28 is slightly smaller than the circular heat exchanger 11, the air passes through each part of the circular heat exchanger 11 to reach the inlet of the bell mouth 28 smoothly, and further smoothly. Turbo fan 26
Sucked into. Therefore, generation of noise is suppressed. More specifically, the heat exchanger 11 and the bell mouth 2
8, the inlet 21 of the turbo fan 26 and the suction port 27 of the turbo fan 26 are all substantially concentric circular shapes. Therefore, the passage resistance of each flow reaching the suction port 27 of the turbo fan 26 through each part of the circular heat exchanger 11 is reduced. It is almost equal. Therefore, the circular heat exchanger 1
The difference in the speed of the air flow in each part of the cross section of the air passage from 1 to the turbo fan 26 is reduced, and the occurrence of turbulence is suppressed, and the noise is reduced.

The outer diameter of the circular heat exchanger 11 is slightly larger than the circular inlet 21 of the bell mouth 28.
All parts of the circular heat exchanger 11 can be effectively used for heat exchange, thereby increasing the efficiency of the entire heat exchanger.
The air that has passed through the circular heat exchanger 11 can smoothly flow into the inlet 21 of the bell mouth 28.

Further, since the circular heat exchanger 11 has almost no portion that does not contribute to heat exchange, the entire indoor unit can be made compact.

Since the circular inlet 21 of the bell mouth 28 is larger than the circular inlet 27 of the turbo fan 26, the circular inlet 2 of the bell mouth 28 is formed.
1, the outer diameter of the circular heat exchanger 11 can be increased, and the heat exchange capacity can be increased.

Since the circular heat exchanger 11 is of a serpentine tube type, the serpentine tubes 12 and 13
Only by changing the meandering width of the circular heat exchanger 11,
It can be manufactured at low cost.

FIG. 3 is a front view showing another embodiment. In this embodiment, the heat exchanger 30 has no header, the upper ends of the serpentine pipes 12 and 13 are connected to the flow dividing device 31 via the branch pipes 32 and 33, and the lower ends of the serpentine pipes 12 and 13 are connected. The section is connected to a flow dividing device 34 via branch pipes 35 and 36. 36 and 37 are refrigerant pipes. Other configurations and operations are the same as those of the embodiment shown in FIGS.

In FIG. 3, branch pipes 41, 42, 45, and 46 indicated by imaginary lines are curved in an arc shape.
It is arranged along the outer circumference of the circular heat exchanger 30.

In this way, the space between the circular heat exchanger 30 and the branch pipes 41, 42, 45, 46 becomes smaller, and the entire indoor unit becomes compact.

FIG. 4 is a front view showing another embodiment. Parts having the same structure and operation as those of the embodiment of FIG. 1 are denoted by the same reference numerals as those of FIG.

The upper and lower headers 1 of the circular heat exchanger 50
5, 56 are connected by serpentine tubes 52, 53. The envelopes of the serpentine tubes 52 and 53 are substantially circular. The left and right ends of the serpentine tubes 52 and 53 and the lower portions 52a and 53a are curved in an arc shape and are connected to the header 56. Fins (not shown) are provided between the serpentine tubes 52 and 53.

The refrigerant pipe 59 connected to the lower header 56 linearly extends rightward. On the other hand, the refrigerant pipe 58 connected to the upper header 15 is curved in an arc shape,
It is arranged along the outer circumference of the circular heat exchanger 50.

As described above, when the refrigerant pipe 58 is curved in an arc shape and arranged along the outer periphery of the circular heat exchanger 50, the space between the circular heat exchanger 50 and the refrigerant pipe 58 is reduced, and The whole machine becomes compact.

In the above embodiment, a serpentine tube type heat exchanger is used. However, a mesh fin type heat exchanger may be used, or a heat exchanger of a type in which a circular tube for heat exchange penetrates the fins. It may be an exchanger. The point is that the heat exchanger only needs to be circular.

In the above embodiment, the indoor unit is described as an air conditioner. However, it is needless to say that the present invention can be applied to an outdoor unit and also to an integrated air conditioner. No.

[0040]

As is apparent from the above description, the air conditioner according to the first aspect of the present invention is a turbo fan that sucks air from the front in the axial direction through a circular suction port and blows air outward in the radial direction. Since it is arranged in front of the turbofan and has a circular suction port and a substantially concentric circular heat exchanger of the turbofan, the air passing through each part of the circular heat exchanger can be smoothly supplied to the turbofan. Flows toward the circular suction port, the difference in flow velocity between the flows of the air becomes small, turbulence hardly occurs, and noise can be reduced. In other words, since the circular heat exchanger and the circular suction port are concentric, the passage resistance from each part of the circular heat exchanger to the circular suction port of the turbofan becomes substantially equal,
The difference between the velocities of the respective air flows is reduced, and the generation of noise can be suppressed.

Since the heat exchanger has a circular shape corresponding to the circular suction port of the turbofan, air flows smoothly through all the parts of the circular heat exchanger, and Efficiency can be increased.

Since the circular heat exchanger has almost no portion that does not contribute to heat exchange, the whole air conditioner can be made compact.

The air conditioner according to the second aspect of the present invention is the first aspect.
In the air conditioner according to the above, a bell mouth is arranged between the circular suction inlet of the turbo fan and the circular heat exchanger, and the outside diameter of the circular inlet of the bell mouth is the circular heat exchange. Since the outer diameter of the heat exchanger is substantially equal to the outer diameter of the heat exchanger, or is smaller than the outer diameter of the circular heat exchanger by a predetermined dimension, all the air passing through the circular heat exchanger can smoothly flow into the circular inlet of the bell mouth. , And can be guided to the circular suction port of the turbo fan, thereby suppressing noise.

In addition, since the air from the circular heat exchanger is guided to the circular inlet of the bell mouth which is larger than the suction port of the turbo fan, the air flow is less likely to be disturbed and noise can be reduced. In addition, depending on the size of the bell mouth's circular inlet, it is possible to increase the outer diameter of the circular heat exchanger, increase the heat exchange area of the circular heat exchanger, and increase the heat exchange capacity. it can.

The air conditioner according to the third aspect of the present invention is the first aspect.
Or the air conditioner according to 2, wherein the circular heat exchanger includes a serpentine tube and a fin, and the serpentine tube has a substantially circular envelope. A simple and inexpensive circular heat exchanger can be manufactured.

An air conditioner according to a fourth aspect of the present invention is the first aspect of the present invention.
In the air conditioner according to any one of Items 3 to 3, the circular heat exchanger is connected to the branching device by a plurality of branch pipes, and the branch pipes are curved in an arc shape to form an outer periphery of the circular heat exchanger. , No wasteful space is provided between the branch pipe and the circular heat exchanger, and the entire air conditioner can be made compact.

The air conditioner according to the fifth aspect of the present invention is the first aspect of the present invention.
In the air conditioner according to any one of (1) to (3), the refrigerant pipe connected to the header is curved in an arc shape and is arranged along the outer circumference of the circular heat exchanger. Since there is no useless space between the air conditioner and the exchanger, the entire air conditioner can be made compact.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of an indoor unit of an air conditioner according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the indoor unit of the embodiment.

FIG. 3 is a front view of a main part of an indoor unit according to another embodiment.

FIG. 4 is a front view of a main part of an indoor unit according to another embodiment.

FIG. 5 is a front view of a main part of an indoor unit of a conventional air conditioner.

[Explanation of symbols]

 11, 30, 50: circular heat exchanger, 12, 13, 52, 53 ... serpentine pipe, 18, 19, 58, 59 ... refrigerant pipe, 21 ... inlet, 26 ... turbofan, 27 ... suction port, 28 ... bell Mice, 31, 34 ... diversion device, 41, 42, 45, 46 ... branch pipe.

Claims (5)

[Claims] 1. A circular suction port (27) from the front in the axial direction.
A turbo fan (26) for sucking air and blowing air radially outward, and a circular suction port (27) disposed in front of the turbo fan (26) and having a circular shape. An air conditioner including a substantially concentric circular heat exchanger (11, 30, 50). 2. The air conditioner according to claim 1, wherein a bell mouth is provided between the circular suction port (27) of the turbo fan (26) and the circular heat exchanger (11, 30, 50). (28), and the outside diameter of the circular inlet (21) of the bell mouth (28) is the same as that of the circular heat exchanger (11,
An air conditioner characterized by being substantially equal to the outer diameter of the circular heat exchanger or smaller by a predetermined dimension than the outer diameter of the circular heat exchanger (11, 30, 50). 3. The air conditioner according to claim 1, wherein the circular heat exchanger (11, 30, 50) includes a serpentine tube (12, 13, 52, 53) and fins, and An air conditioner characterized in that the envelope of the tubes (12, 13, 52, 53) is substantially circular. 4. The air conditioner according to claim 1, wherein the circular heat exchanger (30) includes a plurality of branch pipes (41, 4).
2, 45, 46), the branch pipes (41, 42, 45, 46) are curved in an arc shape and extend along the outer periphery of the circular heat exchanger (30). An air conditioner characterized by being arranged as follows. 5. The air conditioner according to claim 1, wherein the circular heat exchanger (50) is provided between the header (15, 56) and the header (15, 56). And a fin provided between the heat exchange tubes (52, 53) and the heat exchange tubes (52, 53). The refrigerant pipe (58) connected to the header (15) has an arc shape. An air conditioner characterized by being arranged so as to be curved along the outer periphery of the circular heat exchanger (50).