JP2003222384A - Heat exchanger of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger of an air conditioner with improved workability in the assembly of the heat exchanger formed of a plurality of heat exchange members. <P>SOLUTION: A compressor 1, a first heat exchanger 2, a capillary 3, and a second heat exchanger 4 are connected to each other through refrigerant pipes 5 to form a refrigerant circuit. An indoor blower 8 is installed in an indoor unit frame body A having a second heat exchanger 4 disposed therein, and indoor air sucked from an air inlet 6 is cooled by the second heat exchanger 4 and blown out of an air outlet 7. The second heat exchanger 4 is formed of a plurality of heat exchange members 4a disposed at specified angles, a side plate 9 is disposed on both sides of the heat exchange members 4a, and projected parts 10 overlapped with each other from the side plate 9 of the heat exchange member 4a toward the side plate of the adjacent heat exchange member 4a is formed. A bent piece 10a facing the end of the other projected part 10 is formed at the end part of the projected part 10, and the second heat exchanger 4 is formed integrally with the heat exchange member connection pipe 11 of the adjacent heat exchange member 4a by welding while fitting the bent pieces 10a to the projected parts 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a general household air conditioner, and more particularly to a heat exchanger thereof.

[0002]

2. Description of the Related Art An air conditioner is composed of an indoor unit, an outdoor unit, and a refrigerant pipe that connects them to circulate a refrigerant. After the refrigerant gas is brought to a high temperature and high pressure state by the compressor in the outdoor unit, it is sent to the first heat exchanger, and in the first heat exchanger, the refrigerant flowing in the heat exchanger and the air suction port to the outside By exchanging heat with the outside air taken into the outdoor unit by the blower, the refrigerant becomes a liquid state from high-temperature and high-pressure gas, and after the pressure of the high-pressure liquid refrigerant is further reduced by the capillary, it is carried to the indoor unit by the refrigerant pipe.

On the other hand, in the indoor unit, an indoor blower that creates an air flow from the air inlet to the air outlet is installed in the ventilation path from the air inlet to the air outlet, and is taken into the indoor unit by the indoor blower. The cooled air is sent to the room from the air outlet by evaporating the refrigerant in the liquid state to remove the heat of vaporization by applying the air to the second heat exchanger.

The second heat exchanger comprises, for example, a heat exchange member arranged on the front side of the indoor blower and a heat exchange member arranged on the rear side thereof, and these are connected to each other through the air suction port to the indoor blower. It is installed in the indoor unit in a state where it surrounds the indoor blower in the ventilation path that flows through.

Further, in recent years, there has been a remarkable progress in pursuing energy saving in home air conditioners, and in order to save energy, it is necessary to improve the efficiency of the heat exchanger. Therefore, the second heat exchanger requires efficient arrangement, that is, a heat exchanger having fins with curved surfaces or a complicated heat exchanger formed by combining a plurality of bent heat exchangers.

If the heat exchanger is formed of a plurality of heat exchange members, its shape becomes complicated, and it becomes difficult to assemble the heat exchanger in manufacturing. If the heat exchangers are not assembled correctly, the heat exchange members are connected to each other. It may happen that the member connecting pipe cannot be welded at a predetermined position. For this reason, it is important that the heat exchanger is assembled at a predetermined angle so as to have the required strength, and it is desirable that the heat exchanger be assembled in a short time and in a simple manner in order to increase the number of products produced.

As a method of connecting the heat exchangers, for example, one of the overlapping connecting plates is provided with a claw and the other is provided with a hole, and the holes and the claws are fitted to temporarily fix the connecting plates, and then the connecting plates are fixed with screws. There is. (JP-A-9-
(See No. 145145)

[0008]

However, in this method, a predetermined work of fitting the claw into the hole is required, and in the work on the assembly line, since the lateral width of the heat exchange member is long, it is difficult to know the position of the hole. Work to put nails is not very good. In addition, since the work of screwing is also required, the number of work steps increases.

The present invention has been conceived so that anyone on the assembly line can reliably and easily perform the work. The heat exchange member is positioned, and thereby the heat exchange member connection pipe is placed at a predetermined position. It is an object of the present invention to provide a heat exchanger that can be inserted into a heat exchange member and can perform a welding process simply without failure and has necessary strength.

[0010]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and includes a compressor 1 for compressing a refrigerant gas into a high temperature and high pressure state and a liquid state by radiating the high temperature and high pressure refrigerant gas. A first heat exchanger 2 that serves as a refrigerant, a second heat exchanger 4 that gasifies the refrigerant through a capillary 3 that reduces the pressure of the high-pressure liquid refrigerant, the compressor 1 and the first heat exchanger 2 And a refrigerant pipe 5 for connecting the capillary 3 and the second heat exchanger 4 to circulate the refrigerant, and the inside of the indoor unit frame A having the air inlet 6 and the air outlet 7 In an air conditioner provided with an indoor blower 8 that creates an air flow from the mouth 6 toward the air outlet 7 and the second heat exchanger 4 through which the air from the indoor blower 8 passes, the second heat exchanger 4 has a predetermined size. Formed by a plurality of heat exchange members 4a arranged at an angle of Side plates 9 are provided on both sides of each heat exchange member 4a, and projecting portions 10 that overlap each other from the side plate 9 of the heat exchange member 4a toward the side plate 9 of the adjacent heat exchange member 4a are formed. Bend pieces 10a are formed at the end portions of the second heat exchanger 4 toward the ends of the other protrusions 10, and the second heat exchanger 4 has the respective bend pieces 10a.
The heat exchanger of the air conditioner is characterized in that the heat exchange member connection pipes 11 of the adjacent heat exchange members 4a are welded to be integrated with each other while the and the protrusions 10 are fitted together.

Further, in the invention described in claim 2, in the protruding portion 10 formed so as to overlap the side plates 9 of the adjacent heat exchange members 4a, at least one protruding portion 10 is parallel to the bending piece 10a. By forming the stepped portion 10b having a portion and positioning the protrusion 10 of the other side plate 9 between the bent piece 10a and the stepped portion 10b, the movement due to the rattling after the fitting is performed. Be able to regulate.

According to the third aspect of the present invention, in the protruding portion 10 formed so as to overlap the side plates 9 of the adjacent heat exchange members 4a, one protruding portion 10 has a parallel portion between the bent piece 10a. Forming a stepped portion 10b having a bent piece 10a located at an end portion and a projection root portion 10c wider than the projection portion 10 located on the side plate 9 side. The heat exchanging member 4 is formed by positioning the protrusion root 10c and the protrusion 10 of the other side plate 9 between the bent piece 10a and the step 10b to thereby provide a guide for fitting.
It becomes possible to assemble even when a is separated from each other.

[0013]

According to these inventions, by fitting the bent pieces 10a of the heat exchange member 4a to the protrusions 10, the heat exchange member 4a can be temporarily fixed at a predetermined angle and are temporarily fixed. For heat exchange member connection pipe 11
Can be smoothly welded, and the heat exchange member 4a can be connected with sufficient strength by welding. As described above, the heat exchanger can be assembled with sufficient strength at a predetermined angle by a simple operation.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure will be described with reference to the drawings showing an embodiment.
Reference numeral 2 is a first heat exchanger that radiates high-temperature high-pressure refrigerant gas into a liquid refrigerant, 12 is an air outlet provided to blow out air that has passed through the first heat exchanger 2, and 13 is first heat. The outdoor blower 3 provided between the exchanger 2 and the air outlet 12 is a capillary for reducing the pressure. A is an indoor unit frame of the air conditioner, B is an outdoor unit frame, and the compressor 1, the first heat exchanger 2, the outdoor blower 13, and the capillary 3 are housed in the outdoor unit frame B. 5 is a refrigerant pipe, and the refrigerant pipe 5
The indoor unit frame A and the outdoor unit frame B are connected by.

Reference numeral 4 is a second heat exchanger installed in the indoor unit frame A, 14 is a front panel attached to the indoor unit frame A, 6 is an air suction port provided in front of the front panel 14, 7 Is an air blower port formed on the lower side of the front panel 14, and 8 is an indoor blower that creates an air flow from the air suction port 6 through the second heat exchanger 4 toward the air blower port 7. The air taken into the indoor unit frame A from the port 6 is heat-exchanged between the refrigerant and the indoor air by the second heat exchanger 4, and the refrigerant becomes a gas from the liquid to remove the heat of evaporation, so that the indoor air is The cooled indoor air is carried by the indoor blower 8 to the air outlet 7 formed on the lower side of the front panel 14. Reference numeral 15 is a vertical wind direction plate that is provided at the air outlet 7 and that can be opened and closed, and 16 is a left and right wind direction plate that is also provided at the air outlet 7.
5 and the left and right wind direction plates 16 are both provided to guide the air blowing direction.

Reference numeral 4a denotes two heat exchange members constituting the second heat exchanger 4, and the second heat exchanger 4 is arranged at the rear side of the indoor heat exchanger 8 and at the rear side thereof. The heat exchange member 4a disposed on the front surface is formed by bending in a dogleg shape. Reference numeral 11a denotes a heat exchanger pipe discharged from the side portion of the heat exchange member 4a, 11 denotes a heat exchange member connection pipe for connecting the two heat exchange members 4a, and the heat exchange member connection pipe 11 makes The two heat exchanger 4 is incorporated in the indoor unit frame A in such a shape as to surround the indoor blower 8.

When the second heat exchanger 4 is formed of a plurality of heat exchange members 4a, it is difficult to assemble the heat exchange members 4a at a predetermined angle. Moreover, in the assembly line work, an assembly method that anyone can easily work in a short time is required, and the connected heat exchange member 4a can maintain its shape during the work of assembling the heat exchanger 4 into the indoor unit frame A. Therefore, a certain level of strength is required, and the work of fixing the plurality of heat exchange members 4a while maintaining this shape has often failed.

In the present invention for solving the above-mentioned problems,
9 is a side plate provided on both sides of the heat exchange member 4a, 10 is a protrusion extending from each side plate 9 toward the adjacent heat exchange member 4a, and 10a is the protrusion 1
It is a bending piece formed at the end portion of 0 toward the end of another protruding portion 10, and the protruding portion 10 and the bending piece 10a are fitted and temporarily fixed so as to be in a superposed state, and then the heat exchangers adjacent to each other. The heat exchange member connection pipe 11 fitted in the pipe 11a is welded to be integrally formed.

The assembly of the second heat exchanger 4 will be described below. For example, first on the assembly line, the heat exchange member 4
The protrusion 10 of the left side plate 9 of "a" is superposed on the other protrusion 10, and the side of each protrusion 10 is fitted into the rising surface of the other bent piece 10a. Next, the right side plate 9 is arranged such that one of the protrusions 10 faces upward and the tip of the other protrusion 10 is superposed, and the end face of the protrusion 10 is the rising surface of the upward bending piece 10a of the other protrusion 10. When it is slid by using as a guide, the downward bending piece 10a of the protrusion 10 fits into the side portion of the other protrusion 10. As a result, the heat exchange member 4a is temporarily fixed and can be positioned. Therefore, if the heat exchange member connection pipe 11 is inserted while maintaining this state, the heat exchange member connection pipe 11 is set in a predetermined position and welded in this state. Thereby, the two heat exchange members 4a can be connected.

As described above, even an operator unfamiliar with the work can easily temporarily fix the protrusion 10 by sliding the other bent piece 10a using the rising surface of the other bent piece 10a as a guide and welding the heat exchange member connecting pipe 11. Can be securely fixed by. It should be noted that depending on the arrangement shape of parts, the protrusion 10
The bent piece 10a cannot be formed in a large size.
When the fitting portion is small and the fitting portion is wobbling, holes can be provided in the overlapped protrusions 10 and fixed by screws, and the positioning of the heat exchange member 4a can be strengthened.

In order to arrange the heat exchange member 4a at a predetermined angular position when assembling the heat exchange members 4a, it is necessary to project the heat exchange member connection pipe 11 from the side plate 9 and weld it to the heat exchanger pipe 11a. is there. For this reason, it is necessary to further regulate the movement so that the overlapped protrusions 10 do not wobble.

Reference numeral 10b denotes a step portion provided on the protrusion 10, the step portion 10b is formed so as to be parallel to the bent piece 10a, and the other protrusion 10 has the step portion 10b.
The end face is formed such that the side end portions are parallel to each other with a width such that they are in close contact with each other and the bent piece 10a.

Since the space formed by the step portion 10b and the bent piece 10a and the width of the other protruding portion 10 are the same, the protruding portion 10 provided with the step portion 10b is fitted into the other protruding portion 10. The rattling at the time of insertion is small, and the bent piece 10a can also prevent disengagement after fitting. Further, since the step portion 10b can be separated from the side plate 9, a predetermined space can be formed between the two heat exchange members 4a, and the step portion 10b and the bending piece 10a that maintain parallelism can be formed at an arbitrary angle with respect to the side plate 9. Since it can be formed, the heat exchange member 4a
The two can be assembled at any angle.

When the heat exchanging member 4a is assembled, the two heat exchanging members 4 are provided in order to protect the fins from being crushed.
It is better to arrange a at intervals. Reference numeral 10c denotes a projection root portion formed to be wide and located on the side plate 9 side of the projection 10 of the heat exchange member 4a adjacent to the heat exchange member 4a provided with the stepped portion 10b. The rising surface of the portion 10b is used as a guide by applying it to the end surface of the projection root portion 10c of the other heat exchange member 4a, and the heat exchange member 4a is slid along the end surface of the other projection root portion 10c to form the bent piece 10a and the step portion 10b. Between the other side plates 9
The protrusion 10 is fitted.

As described above, when the protrusion 10 is inserted, the end face of the protrusion root 10c of the other protrusion 10 serves as a guide.
The bending piece 10a can be fitted easily and surely.

Further, the protrusion 10 having the protrusion root 10c between the step 10b of the heat exchange member 4a and the bent piece 10a can be inserted without rattling, and the step 10
The protruding portion 10 with b is fitted between the bent piece 10a and the protruding root portion 10c of the protruding portion 10 with the other protruding root portion 10c. Therefore, since the overlapping portions of the protruding portions 10 are between the step portion 10b and the bending piece 10a and the other is between the protruding root portion 10c and the bending piece 10a, the two heat exchange members 4a can be separated from each other in positional relationship. It was possible to prevent the fins from being crushed before the temporary fixing.

[0027]

As described above, according to the present invention, the heat exchanging member 4a is formed into the predetermined shape by forming the projection 10 and the bending piece 10a from the heat exchanging member 4a and superposing the projection 10 and the bending piece 10a. Since it can be positioned at an angle, it can be welded at an accurate position even during welding, has strength, and can reduce the number of work steps in the assembly line.

Further, the bending piece 10 is provided on one of the protrusions 10.
By forming another step 10b between the bent piece 10a and the stepped portion 10b by forming a and the stepped portion 10b, the movement after the fitting is restricted, and wobbling between the heat exchange members 4a can be prevented. It can be fixed in the correct position. Further, since the step portion 10b can be separated from the side plate 9, the step portion 10b can be formed at an arbitrary angle with respect to the side plate 9, and the heat exchange members 4a can be assembled at an arbitrary angle. .

In addition, one of the protrusions 10 has a protrusion root 10
c and the bent piece 10a, and the step portion 10b and the bent piece 10a are provided on the other protrusion 10 so that the rising end surface of the step portion 10b extends along the end surface of the protrusion root portion 10c when the heat exchange member 4a is fitted. Since it slides, the end surface of the projection root portion 10c serves as a guide, and fitting can be performed easily and reliably. Further, after fitting, the bent piece 10
The movement of the heat exchange member 4a is restricted by the a, the step portion 10b, and the projection root portion 10c, and the heat exchange member 4a can be positioned so as not to come off easily.

Further, the heat exchange members 4a can be fixed to separate positions by setting the positions of the stepped portion 10b and the projection root portion 10c, and there is no problem of crushing the ends of the fins in the manufacturing line. I was able to prevent it.

[Brief description of drawings]

FIG. 1 is a piping structure of an air conditioner showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a state during assembly of the heat exchanger showing the embodiment of the present invention.

FIG. 3 is a perspective view showing the assembled state of the heat exchanger according to another embodiment of the present invention.

FIG. 4 is a perspective view showing a state during assembly of a heat exchanger showing another embodiment of the present invention.

[Explanation of symbols]

A Indoor unit frame 1 compressor 2 First heat exchanger 3 capillaries 4 Second heat exchanger 4a heat exchange member 5 Refrigerant piping 6 Air suction port 7 Air outlet 8 indoor blowers 9 Side plate 10 Projection 10a bent piece 10b step 10c Root of protrusion 11 Heat exchange member connection pipe

Claims (3)

[Claims] 1. A compressor 1 for compressing a refrigerant gas into a high temperature and high pressure state, a first heat exchanger 2 for radiating a high temperature and high pressure refrigerant gas into a liquid refrigerant, and a pressure of the high pressure liquid refrigerant. The second heat exchanger 4 for gasifying the refrigerant through the capillary 3 for lowering the temperature, the compressor 1, the first heat exchanger 2, the capillary 3 and the second heat exchanger 4 are connected to each other to cool the refrigerant. An indoor blower 8 that creates a flow of air from the air suction port 6 to the air outlet 7 is provided in the indoor unit frame A that is provided with a refrigerant pipe 5 that circulates and that has an air inlet 6 and an air outlet 7. In the air conditioner provided with the second heat exchanger 4 through which the wind of the indoor blower 8 passes, the second heat exchanger 4 is formed by a plurality of heat exchange members 4a arranged at a predetermined angle, and Each heat exchange member 4
A side plates 9 are provided on both sides of the heat exchange member 4a.
From the side plate 9 of the adjacent heat exchange member 4a toward the side plate 9 of the adjacent heat exchange member 4a, forming the overlapping protruding portion 10,
Bending pieces 10a are formed at the ends of each protruding portion 10 toward the ends of the other protruding portions 10, and the second heat exchanger 4 fits the bending pieces 10a and the protruding portion 10 together, A heat exchanger for an air conditioner, characterized in that the heat exchange member connection pipes 11 of adjacent heat exchange members 4a are welded to be integrally formed. 2. A protrusion 10 formed so as to overlap from side plates 9 of adjacent heat exchange members 4a. At least one protrusion 10 has a bent piece 10a.
The heat of the air conditioner according to claim 1, wherein a step portion 10b having a parallel portion is formed between the bent piece 10a and the step portion 10b, and the protrusion 10 of the other side plate 9 is positioned between the bent piece 10a and the step portion 10b. Exchanger. 3. In a protrusion 10 formed so as to overlap from side plates 9 of adjacent heat exchange members 4a, one protrusion 10 is provided with a step 10b having a parallel portion with the bending piece 10a. The other projection 10 has a bent piece 10a located at the end and a projection root 10 wider than the projection 10 located on the side plate 9 side.
The heat exchanger for an air conditioner according to claim 1, wherein the projection root portion 10c and the projection portion 10 of the other side plate 9 are located between the bent piece 10a and the step portion 10b.