KR100450269B1 - Heat exchanger of air conditioning system - Google Patents

Abstract

The present invention relates to a heat exchanger of an air conditioning system, and an object thereof is to further improve heat exchange efficiency of a refrigerant using air and to configure the air conditioning system more compactly.

To this end, according to the heat exchangers 30L and 30R of the air conditioning system according to the present invention, the refrigerant passes through the blades 80 rotated by the motor 40 without a separate heat exchanger for refrigerant heat exchange. The heat exchange passages 81, 82, 83 are formed so as to be possible. Accordingly, the air is blown by the rotation of the blades 80, and the heat exchange between the blower air and the refrigerant is made directly, thereby reducing the noise of air flow and improving heat exchange efficiency. In addition, since there is no separate heat exchanger for heat exchange of the refrigerant inside the outdoor unit 10 and the indoor unit 20, there is an effect that can be configured more compactly.

Description

Heat exchanger of air conditioning system

The present invention relates to an air conditioning system, and more particularly, to a heat exchanger of an air conditioning system disposed in an outdoor unit and an indoor unit to heat exchange a refrigerant through air.

In general, an air conditioning system uses a refrigeration cycle to condition air, and FIG. 1 schematically shows an air conditioning system to which a conventional heat pump refrigerating cycle is applied.

Referring to FIG. 1, a conventional air conditioning system to which a heat pump cycle is applied includes an outdoor unit (A) having a built-in compressor (1) for driving a driving motor to compress a refrigerant to high temperature and high pressure, and the outdoor unit (A); It is connected to a closed circuit and consists of an indoor unit (B) disposed indoors.

The outdoor unit (A) has a compressor (1), a heat exchanger (2) and a fan (3), an expansion device (4) and a 4-way valve (5), and the indoor unit (B) is a heat exchanger (6). And a fan 7 for forcibly blowing air heat-exchanged with the room to the room. At this time, the heat exchanger (2) of the outdoor unit (A) and the heat exchanger (6) of the indoor unit are performed by changing the role of the condenser or the evaporator according to the cooling or heating operation, which is the change of direction of the 4-way valve (5). It depends on. That is, during the cooling operation, the heat exchanger 2 of the indoor unit A performs the evaporator function, and the heat exchanger 6 of the outdoor unit B performs the condenser function. On the other hand, during the heating operation, the heat exchanger 2 of the indoor unit A performs the condenser function, and the heat exchanger 6 of the outdoor unit B performs the evaporator function.

The heat exchanger (2) (6) used to achieve the cooling and heating effect in such an air conditioning system is a plurality of heat exchange fins (8) arranged in parallel and bent in a U-shape to penetrate them several times, the aluminum circulating the refrigerant It is made of a tube 9 (or a copper tube), and on one side of the heat exchangers 2 and 6, fans 3 and 7 for forcibly supplying secondary fluid, i.e., air, are arranged. Therefore, by artificially guiding the air flow by the fans 3 and 7, the heat exchange efficiency of the refrigerant passing through the heat exchanger 2 and 6 is improved.

However, in the heat exchange structure of the conventional air conditioning system, since a heat exchanger (2) 6 for forming a circulation passage of the refrigerant and a fan (3) 7 for air blowing are separately required on one side thereof, an outdoor or outdoor unit is required. There is a problem that the product size of (A) (B) becomes larger than necessary.

In addition, the heat exchange fins 8 of the heat exchanger 2 and 6 assist in heat exchange, but act as resistances on the air flow side, thereby causing flow noise. Accordingly, the fan (3) (7) must be designed in consideration of the pressure loss in the front and rear of the heat exchanger (2) (6), the heat exchanger (2) (6) in consideration of the air flow noise of the heat exchange fins (8) There is a difficulty in designing the structure.

The present invention is to solve this problem; An object of the present invention is to provide a heat exchanger of an air conditioning system that can be configured more compactly indoor and outdoor units by directly heat-exchanging the refrigerant in a fan rotated by a motor without using a separate heat exchanger.

In addition, another object of the present invention is to make the air flow of the secondary fluid to heat exchange with the refrigerant to form a counter flow (count flow) that is opposite to the flow of the refrigerant, to improve the heat exchange efficiency while reducing the operation noise air conditioning system It is to provide a heat exchanger of.

1 is a system diagram showing an air conditioning system to which a conventional heat pump cycle is applied.

2 is a schematic diagram showing an air conditioning system to which a heat pump cycle according to the present invention is applied.

3 is an exploded perspective view showing the refrigerant heat exchanger according to the present invention.

4 is a cross-sectional view taken along line IV-IV of FIG. 3.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4, showing the internal structure of the hub.

6 is an enlarged view illustrating a coupling structure of a refrigerant supply block and a hub according to the present invention.

Figure 7 shows the internal structure of the refrigerant supply block according to the present invention.

* Description of the symbols for the main parts of the drawings *

10. Outdoor unit 20. Indoor unit

30L, 30R..Heat exchanger 40.Motor

50. Refrigerant supply block 51. Inport

52. Out port 53. Refrigerant supply flow path

54. Refrigerant discharge path 60. Holder

70.Herb 72.Inlet Slot

73.Outlet slot 80..Blade

81,82,83..Heat exchanger

The present invention for achieving this object is;

It is coupled to the rotating shaft of the motor and has a hub formed with an inlet slot into which the refrigerant flows in and an outlet slot through which the refrigerant flows out; A plurality of blades for forming heat exchange flow paths for exchanging blown air and refrigerant,

And a refrigerant supply block coupled to the housing of the motor to be disposed between the motor and the hub to supply the refrigerant to the heat exchange passage of the blade.

In addition, the heat exchange flow path of the blade is characterized in that it is made to branch over the entire blade.

In addition, the heat exchange flow path of the blade is formed along the leading edge of the blade so as to be connected to the inlet slot, the outlet header flow path formed along the trailing edge of the blade so as to be connected to the outlet slot, the outlet header flow path and the inlet header flow path Characterized in that it comprises a plurality of linking passages for interconnecting the.

In addition, the inlet slot and the outlet slot of the hub consist of a predetermined arc having concentricity,

The refrigerant supply block includes a through hole formed at the center of the motor to rotate the shaft, an inlet port formed at one side of the refrigerant supply block, an outlet port through which the refrigerant flows in, and an outlet port through which the heat exchanged refrigerant flows out, and an inlet slot connected to the inlet port. The refrigerant supply passage is formed in the circumferential direction around the through hole so as to communicate with the outlet port, and the refrigerant discharge passage is formed in the circumferential direction so as to be connected to the outlet port and communicate with the outlet slot of the hub.

In addition, the through hole is characterized in that the bearing member is disposed so that the rotation axis of the motor smoothly rotates.

In addition, a packing is provided between the refrigerant supply block and the hub to allow the rotation of the hub to prevent leakage of the refrigerant.

In addition, an outward flange is provided on the outer circumference of one end of the hub adjacent to the refrigerant supply block.

Refrigerant supply block is characterized in that the holder is provided to cover the outward flange to prevent separation of the hub.

In addition, a bearing member is disposed between the holder and the outward flange portion.

In addition, the bearing member is characterized in that it comprises a rotation guide path formed in the circumferential direction on the opposite surface of the holder and the outward flange, respectively, and a plurality of steel balls seated on the rotation guide path for rolling movement of the hub.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 2, the air conditioning system to which the heat pump cycle according to the present invention is applied is capable of performing both cooling and heating by reversing the flow direction of the refrigerant, and the outdoor unit 10 and the indoor side disposed on the outdoor side. It is provided with an indoor unit 20 arranged in.

The outdoor unit 10 includes a compressor 11 for sucking and compressing a refrigerant having a low temperature and a low pressure and discharging the refrigerant at a high temperature and a high pressure state, a heat exchanger 30L for heat exchanging the refrigerant through outdoor air, and an expansion device for reducing the condensed refrigerant. (12) is provided. And the indoor unit 20 is composed of a heat exchanger (30R) for forcibly blowing the heat exchanged air to the indoor space while heat-exchanging the indoor air and the refrigerant. The cycle components of the outdoor unit 10 and the indoor unit 20 are connected to the closed circuit through the refrigerant pipe.

In addition, a 4-way valve 13 for changing the direction of the refrigerant in accordance with the heating or cooling operation is provided at the outlet side of the compressor 11. That is, during the heating operation, the refrigerant in the high temperature and high pressure state discharged from the compressor 11 is guided to the refrigerant heat exchanger 30R on the indoor side through the 4-way valve 13, whereby the refrigerant heat exchanger 30R on the indoor side. Performs the condenser function and the refrigerant heat exchanger (30L) of the outdoor side performs the evaporator function. On the other hand, during the cooling operation, the 4-way valve 13 is switched and the high temperature and high pressure refrigerant discharged from the compressor 11 is guided to the refrigerant heat exchanger 30L on the outdoor side, whereby the refrigerant heat exchanger 30L on the outdoor side. ) Performs the condenser function, and the refrigerant heat exchanger 30R on the indoor side performs the evaporator function.

Meanwhile, referring to FIGS. 3 and 4, the refrigerant heat exchangers 30L and 30R on the outdoor side and the indoor side are integrally formed with a propeller fan and a heat exchanger, and are coupled with the rotation shaft 42 of the motor 40 to rotate. And a plurality of blades 80 provided at equal intervals on the outer circumference of the hub 70 and having heat exchange passages 81, 82, 83 formed therein, and heat exchange of the blades 80. In order to continuously supply refrigerant to the flow paths 81, 82, and 83, a refrigerant supply block 50 is disposed between the housing 41 of the motor 40 and the hub 70. As follows.

First, the hub 70 is directly coupled to the rotary shaft 42 of the motor 40 to rotate, the shaft coupling hole 71 is formed in the center of the shaft for coupling with the rotary shaft 42. Accordingly, when the tip of the rotary shaft 42 extending out of the housing 41 of the motor 40 is inserted into the shaft coupling hole 71 and the key 43 is pressed in, the hub 70 rotates the rotary shaft 42 of the motor 40. ) Is assembled reliably.

As shown in FIGS. 4 and 5, inlet slots 72 in which refrigerant flows into adjacent portions of the blades 80 and outlet slots through which the refrigerant flows out are inside the hub 70. (73, outlet slots) are formed. The inlet slots 72 and the outlet slots 73 are also composed of a predetermined arc having concentricity while maintaining a constant distance, which is the hub 70 is rotated while the inlet slots 72 and the refrigerant supply passage described later In order to continuously connect the 53 and to continuously connect the outlet slots 73 and the refrigerant discharge passage 54 to be described later. In the present embodiment, the inlet slots 72 are formed around the axial coupling hole 71 so that the outlet slots 73 are spaced 120 degrees outward.

Referring to FIGS. 3 and 4, the blades 80 are formed to have vanes, that is, inclination angles, at regular intervals on the outer circumference of the hub 70, thereby generating a blowing force in the axial direction during rotation thereof. In addition, each of the blades 80 has heat exchange passages 81, 82, 83 associated with the inlet slot 72 and the outlet slot 73 to be diverged throughout the inlet slot 72. An inlet header channel 81 formed along the leading edge of the blade 80 to be directly associated with the outlet header channel 82 formed along the trailing edge of the blade 80 so as to be directly associated with the outlet slot 73; The outlet header passage 82 and the inlet header passage 81 are connected to each other to form a refrigerant passage line. Therefore, the refrigerant flowing through the inlet slot 72 exits the outlet slot 73 while evenly passing through the entire blade 80 through the heat exchange passages 81, 82, 83.

6 and 7, the refrigerant supply block 50 is fastened to the housing 41 of the motor 40 through a plurality of mounting bolts 90, which include a rotating shaft 42 of the motor 40. The through hole 55 formed in the center so as to penetrate through the inlet port 51, the outlet port 52, and the inlet port 51, into which the refrigerant is introduced, is formed at one side of the refrigerant supply block 50. In order to communicate with the outlet slot 72 of the hub 70 is connected to the refrigerant supply passage 53, the outlet port 52 circumferentially formed around the through-hole 55 to communicate with the outlet slot 73 of the hub (70) A refrigerant discharge passage 54 is formed in the circumferential direction.

The through hole 55 is formed to allow the rotation shaft 42 of the motor 40 to penetrate in the center of the refrigerant supply block 50 so that the rotation shaft 42 can rotate smoothly therein. The bearing member 56 is arrange | positioned. The inlet port 51 and the outlet port 52 connect the cycle components with the refrigerant supply passage 53 and the refrigerant discharge passage 54 to form a closed circuit, and the refrigerant pipe is directly connected to the inflow of the refrigerant. And discharge.

In addition, the refrigerant supply passage 53 is an annular space formed in the circumferential direction so as to maintain a state of communication with the inlet slots 72 of the hub 70 at all times, and the refrigerant discharge passage 54 is also an outlet slot of the hub 70 ( 73) is an annular space formed in the circumferential direction so that it is always in communication with it. The refrigerant supply passage 53 and the refrigerant discharge passage 54 are provided concentrically around the through hole 55 on the front surface of the refrigerant supply block 50 facing the hub 70. In this embodiment, the refrigerant supply passage 53 is processed inward, and the refrigerant discharge passage 54 is processed outward.

Further, packings 57a (57b) and 57c are disposed between the refrigerant supply block 50 and the hub 70 to prevent refrigerant leakage while allowing rotation of the hub 70. The packings are ring-shaped. And a first packing 57a disposed inside the refrigerant supply passage 53, a second packing 57b disposed between the refrigerant supply passage 53 and the refrigerant discharge passage 54, and a refrigerant discharge. The third packing 57c is disposed outside the flow path 54.

In addition, referring to Figures 3 and 6, the refrigerant supply block 50 is coupled to the holder 60 for preventing the separation of the hub (70). That is, the outward flange 74 is formed at the end edge of the hub 70 adjacent to the front surface of the coolant supply block 50 so as to extend in the radial direction, and the outward flange 74 is formed on the front surface of the coolant supply block 50. The holder 60 is coupled to cover. The holder 60 is assembled together when assembling the refrigerant supply block 50 through the mounting bolt 90, and fixing holes 63 are perforated at equal intervals. The holder 60 is divided into a first holder 61 and a second holder 62 provided in a semi-circular shape, for easy assembly to the refrigerant supply block 50 while covering the outward flange (74).

In addition, a bearing member 75 is disposed between the holder 60 and the outward flange 74 to smoothly rotate the hub 70. The bearing member 75 has rotation guide paths 75a and 75b formed in recesses in the circumferential direction on the opposite surfaces of the holder 60 and the outward flange 74, respectively, and the rotation guide paths 75a and 75b. It is seated on the hub consists of a plurality of steel balls (75c) in the cloud movement during rotation of the hub (70). At this time, the depth of each rotation guide path (75a, 75b) is formed smaller than the radius of the steel balls (75c), so that the holder 60 and the outward flange 74 is not in direct contact with the steel balls (75c). It is preferable to construct.

Next, the operation of the refrigerant heat exchanger according to the present invention and the effects thereof will be described. (The operation of the heat exchanger according to the present invention mounted on the outdoor unit and the indoor unit is more than just a role, and is substantially the same. In the case of cooling operation, the operation of the heat exchanger of the indoor unit will be described as an example.)

When the cooling operation in the summer, the refrigerant heat exchanger 30R of the indoor unit 20 serves as an evaporator. That is, when the 4-way valve 13 is switched so that the high pressure refrigerant discharged from the compressor 11 is discharged to the refrigerant heat exchanger 30L side of the outdoor unit 10, the outdoor refrigerant heat exchanger 30L serves as a condenser. , The indoor refrigerant heat exchanger (30R) serves as an evaporator.

When the motor 40 of the compressor 11 and the indoor refrigerant heat exchanger 30R are driven while the direction of the 4-way valve 13 is switched as described above, the refrigerant decompressed while passing through the expansion device 12 It flows into the inlet port 51 of the indoor refrigerant heat exchanger 30R.

The refrigerant flowing into the inlet port 51 is the refrigerant supply passage 53-the inlet slot 72-the inlet header passage 81 of the heat exchange passage 81-the associated passage 83-the outlet header passage of the heat exchange passage ( Evaporated while passing through 82, the evaporated refrigerant exits to the compressor 11 through the outlet slot 73 coolant discharge passage 54 outlet port 52.

That is, in the indoor refrigerant heat exchanger 30R, the plurality of blades 80 rotates at a high speed together with the hub 70 by driving the motor 40, whereby the indoor air and the surface of the blades 80 are rotated. Forced blowing in the axial direction while rubbing. Therefore, the refrigerant passing through the inside of the blades 80 broadly generates cold air through heat exchange with the indoor air while evaporating, and the cold air is supplied to the room by the blowing force of the blades 80.

As such, the indoor air is cooled by heat exchange with the surface of the blades 80, and subsequently the cold air is immediately blown into the room by the axial blowing force of the blades 80. As a result, the air flow, which is a secondary fluid that exchanges heat with the refrigerant, is formed in a counter flow form that is opposite to the flow of the refrigerant, thereby increasing the heat exchange efficiency of the refrigerant.

In addition, the hub 70 rotates smoothly through the bearing members 56 and 75 and the packings 57a, 57b and 57c. In addition, since the refrigerant supply passage 53 and the refrigerant discharge passage 54 are formed in the circumferential direction, the inlet slot 72 and the outlet slot 73 are associated with them even when the hub 70 rotates at a high speed. The state is maintained as it is and the refrigerant flows smoothly.

On the other hand, except that the refrigerant is condensed in the outdoor refrigerant heat exchanger (30L), which serves as a condenser during the cooling operation, since substantially the same operation and effect as the indoor refrigerant heat exchanger (30R), the operation for this Description is omitted.

In addition, in the case of diffused operation, the outdoor refrigerant heat exchanger 30L and the indoor refrigerant heat exchanger 30R have the same effect as their roles are changed.

As described above in detail, according to the heat exchange device of the air conditioning system according to the present invention, the heat exchange path is formed so that the refrigerant passes through the blades rotated by the motor without a separate heat exchanger for refrigerant heat exchange. It is. Accordingly, the air is blown by the rotation of the blades, and the heat exchange between the blower air and the refrigerant is performed directly, thereby reducing the flow noise of the air and significantly improving the heat exchange efficiency. In addition, since there is no separate heat exchanger for refrigerant heat exchange in the outdoor unit and the indoor unit, there is an effect that can be configured more compactly.

Claims (9)

A hub coupled to the rotating shaft of the motor and having an inlet slot through which refrigerant flows in and an outlet slot through which refrigerant flows out; A plurality of blades provided radially on the outer circumference of the hub and having one end connected to the inlet slot and the other end connected to the outlet slot to form a heat exchange path for exchanging blown air and refrigerant; A refrigerant supply block coupled to the housing of the motor to be disposed between the motor and the hub to supply refrigerant to the heat exchange passage of the blade, The inlet slot and outlet slot of the hub consists of a predetermined arc having concentricity, The refrigerant supply block has a through hole formed in the center so that the rotating shaft of the motor penetrates, an inlet port formed at one side of the refrigerant supply block, an outlet port through which the refrigerant flows, and an outlet port through which the heat exchanged refrigerant flows out, and is connected to the inlet port. A refrigerant supply passage formed in the circumferential direction with respect to the through hole so as to communicate with the inlet slot of the hub, and a refrigerant discharge passage formed in the circumferential direction so as to be connected to the outlet port and communicate with the outlet slot of the hub; Heat exchanger for air conditioning system. The method of claim 1, The heat exchange path of the blade is a heat exchange device of the air conditioning system, characterized in that made to branch over the entire area of the blade. The method of claim 2, Heat exchange path of the blade An inlet header channel formed along the leading edge of the blade so as to be associated with the inlet slot; An outlet header channel formed along the trailing edge of the blade so as to be associated with the outlet slot; And a plurality of connecting passages for interconnecting the outlet header passage and the inlet header passage. delete The method of claim 1, Heat exchanger for the air conditioning system, characterized in that the bearing member is disposed in the through hole so that the rotation axis of the motor smoothly rotates. The method of claim 1, And a packing is provided between the refrigerant supply block and the hub to prevent the leakage of the refrigerant while allowing the rotation of the hub. The method of claim 1, An outward flange is provided on an outer circumference of one end of the hub adjacent to the refrigerant supply block. The refrigerant supply block is a heat exchange device for an air conditioning system, characterized in that the holder is provided to cover the outward flange to prevent the separation of the hub. The method of claim 7, wherein And a bearing member is disposed between the holder and the outward flange portion. The method of claim 8, The bearing member Heat guide for air-conditioning system, characterized in that it comprises a rotation guide path formed in the circumferential direction on the opposite surface of the holder and the outward flange, respectively, and a plurality of steel balls seated on the rotation guide path for rolling movement of the hub Device.