JP4675224B2 - Air conditioner - Google Patents

Description

The present invention relates to air conditioner, particularly, it relates to air conditioner having the auxiliary heat exchanger main heat exchanger.

In recent years, with the energy saving of air conditioners, there has been a demand for higher efficiency of heat exchangers used in air conditioners. Moreover, the heat exchanger used for the indoor unit in the air conditioner is required to be downsized in order to affect the size and design of the indoor unit. In order to increase the efficiency of such a heat exchanger, for example, Patent Document 1 includes an auxiliary heat exchanger and a main heat exchanger, and a subcooling area during heating operation is used as an auxiliary heat exchanger. A heat exchanger with improved heat exchange efficiency has been proposed.
JP 2000-329486 A

  However, in a heat exchanger in a conventional air conditioner, the structure of the auxiliary heat exchanger needs to be a heat exchanger that is separate from the structure of the main heat exchanger from the viewpoint of indoor air blowing efficiency and the like. For this reason, the production and assembly of the auxiliary heat exchanger is performed separately from the production and assembly of the main heat exchanger, and there is a problem that productivity is impaired.

The present invention has been made to solve the above-described problems, and an object thereof is to provide an air conditioner equipped with a highly productive heat exchanger.

The air conditioner according to the present invention is an air conditioner having a fan for taking in and sending out air, a first heat exchanger, and a second heat exchanger. The first heat exchanger includes a first fin portion, which is disposed so as to penetrate the first fin portion and a first pipe group for flowing a predetermined refrigerant. The second heat exchanger includes a second fin portion and a second pipe group that is disposed so as to penetrate the second fin portion and allows a predetermined refrigerant to flow therethrough . In its first heat exchanger and the second heat exchanger, respectively extend with a predetermined width, a plurality of fins disposed so as to overlap at a predetermined interval so as to circulate the air in, one side across the predetermined cut formed so as to be connected at the other end portion while being formed toward the other end from one end of each of the width direction of the plurality of fins in the middle of the extending directions A plurality of fin portions located at the first fin portion, a plurality of fin portions located on the other side across the cut as a second fin portion, a predetermined cut is spread from one end side, and the second The second heat exchanger is disposed so as to overlap the windward side of the first heat exchanger by bending the fin portion by 180 ° with respect to the first fin portion, and the first heat exchanger is arranged as the main heat exchanger. And assisting the second heat exchanger It has been with the exchanger. In the main heat exchanger, the first piping group is arranged in a plurality of rows in the width direction of the plurality of fin portions forming the first fin portion. In the auxiliary heat exchanger, the second piping group is arranged in the width direction of the plurality of fin portions forming the second fin portion so as to have the same number of rows as the plurality of rows of the first piping group or less. ing.

According to this configuration, the first heat exchanger and the second heat exchanger are formed by expanding predetermined cuts provided in the plurality of fins and bending the second fin portion by 180 ° with respect to the first fin portion. The first heat exchanger is superposed on the first heat exchanger so that the second heat exchanger is on the windward side, and the second heat exchanger is the auxiliary heat exchanger. Thereby, compared with the case where a 1st heat exchanger and a 2nd heat exchanger are manufactured and assembled separately, productivity of a heat exchanger can be improved and common parts can also be aimed at. . The angle of 180 ° is not intended to be a mathematical angle, and is intended to include manufacturing errors.

The main heat exchanger has a first end plate of the first fin portion, and the auxiliary heat exchanger has a second end plate of the second fin portion, and the first end plate and the second end plate are engaged. By stopping, it is preferable that the main heat exchanger and the auxiliary heat exchanger are locked in an overlapped state.

Embodiment 1
As a first embodiment of the present invention, a method for manufacturing a heat exchanger will be described. First, as shown in FIG. 1, fins 2 having a predetermined width are prepared. The fin 2 has an opening 3 into which the heat transfer tube is inserted in advance. In addition, a slit (not shown) for controlling the ventilation resistance is formed between the adjacent openings 3 as described later.

  Next, as shown in FIGS. 2 and 3, a heat transfer tube 7 for flowing a predetermined refrigerant through the end plate 8 is inserted, and subsequently, the heat transfer tube 7 is inserted through the corresponding opening 3 of the fin 2. The fins 2 are sequentially stacked. Thus, as shown in FIG. 4, the fin part 9 used as the heat exchanger which laminated | stacked the fin 2 is formed. Next, in the fin portion 9, a cut 5 is formed at a predetermined position in the middle of the direction in which the fin 2 extends. The cut 5 is formed from one end side in the width direction of the fin 2 toward the other end side, leaving the portion 6 on the other end side in the width direction.

  Next, as shown in FIG. 5, the portion of the fin portion 9 located on one side across the cut 5 is referred to as a first fin portion 10, and the portion of the fin portion 9 located on the other side across the cut 5 is the first fin portion 10. As the second fin portion 11, the cut 5 is gradually widened from one end side, and the second fin portion 11 is bent 180 ° with respect to the first fin portion 10 as shown in FIG. 11 is superimposed on the second fin portion 10. The nail | claw part 8a provided in the end plate 8 of the 2nd fin part 11 is latched by the end plate 8 of the 1st fin part 10 in the overlapped state.

  The first fin portion 10 and the second fin portion 11 that are overlapped, the first fin portion 10 becomes, for example, a main heat exchanger (first heat exchanger) 12, and the second fin portion 11 becomes an auxiliary heat exchanger ( (Second heat exchanger) 13.

  Next, the main heat exchanger 12 and the auxiliary heat exchanger 13 formed in this manner are the most air flow in the air conditioner indoor unit as shown in FIG. The auxiliary heat exchanger 13 is disposed on the upstream side with respect to the air flow, and the main heat exchanger 12 is disposed on the downstream side. Similarly, other heat exchangers 14 and 15 formed by laminating fins are also arranged at predetermined positions. Thus, arrangement | positioning of the heat exchanger 1 in an air conditioner is completed, and the indoor heat exchanger is completed by connecting predetermined heat exchanger tubes (not shown) in each heat exchanger after that. To do.

  Next, as an example of the operation of the air conditioner provided with such a heat exchanger, a heating operation will be described as an example. In the case of heating operation, the heat exchanger 1 on the indoor unit side functions as a condenser, and when air is sent into the heat exchanger 1 by the crossflow fan 20, the air sent in and the refrigerant flowing through the heat transfer pipe Heat exchange takes place between them.

  In this case, the refrigerant made into a high-temperature gas by the compressor of the outdoor unit (both not shown) first flows into the main heat exchanger 12. The refrigerant that has flowed into the main heat exchanger 12 exchanges heat with air as it flows through the heat transfer tube, and gradually liquefies to become a gas-liquid two-phase state. The refrigerant in the gas-liquid two-phase state flows out from the main heat exchanger 12 and finally flows into the auxiliary heat exchanger 13. The refrigerant flowing into the auxiliary heat exchanger 13 is supercooled while flowing through the heat transfer tube, and flows out of the auxiliary heat exchanger 13 as a low-temperature liquid refrigerant.

  Since the main heat exchanger 12 and the auxiliary heat exchanger 13 in the heat exchanger 1 are separated, the auxiliary heat exchanger 13 that is filled with a low-temperature refrigerant when the heat exchanger 1 is used as a condenser. Is separated from the main heat exchanger 12, and the temperature of the main heat exchanger 12 can be kept high. As a result, the temperature difference between the air and the heat exchanger 1 is increased, and the heat exchange rate of the auxiliary heat exchanger 13 can be improved. The air conditioner including the heat exchanger manufactured by the manufacturing method according to the present embodiment is configured and operates as described above.

  According to the heat exchanger manufacturing method described above, the main heat exchanger 12 and the auxiliary heat exchanger 13 widen the predetermined cut 5 provided in the fin portion 9 formed by stacking the plurality of fins 2. The second fin portion 11 is bent by 180 ° with respect to the first fin portion 10, and the second fin portion 11 is overlapped with the second fin portion 10.

  Thereby, compared with the case where a main heat exchanger and an auxiliary heat exchanger are manufactured separately and assembled like a heat exchanger in a conventional air conditioner, productivity of the heat exchanger can be improved. At the same time, parts can be shared.

  In the heat exchanger for an air conditioner described above, the second fin portion is folded 180 ° with respect to the first fin portion based on a predetermined cut 5 and overlapped with the first fin portion to assist the main heat exchanger. The case of manufacturing a heat exchanger has been described as an example, but this method is not limited to this, and is also applicable to the manufacture of main heat exchangers and auxiliary heat exchangers with other heat exchangers. Is possible. Some examples will be described below as modified examples 1 to 3.

Modification 1
First, as shown in FIG. 2 and FIG. 3, after forming the fin portion 9 by laminating the fins 2, for example, as shown in FIG. 5b is formed. The cut 5a is formed from one end side to the other end side, leaving a portion 6 on the other end side in the width direction of the fin portion 9. The cut 5b is formed from the other end side to the one end side, leaving the portion 6 on the one end side in the width direction of the fin portion 9.

  Next, first, the cut 5a is gradually widened from one end side, and the fin portion 9b located on one side across the cut 5a is bent 180 ° with respect to the fin portion 9c located on the other side across the cut 5a. Thus, the main heat exchanger 12 and the auxiliary heat exchanger 13 are formed by superimposing the fin portion 9c on the fin portion 9b as shown in FIG.

  Then, the cut 5b is gradually widened from the other end side, and the portion of the fin portion 9a located on one side with the cut 5b is sandwiched between the fin portion 9b on the other side with the cut 5b sandwiched by a predetermined angle. Only the other heat exchanger 14 connected with the main heat exchanger 12 at the end is manufactured by bending only. And the heat exchanger 1 of an indoor unit is manufactured by arrange | positioning the other heat exchanger 15 separately.

Modification 2
Further, after forming the two fin portions 9 by laminating the fins 2, for example, as shown in FIG. 10, one cut 5 a is formed for one fin portion 9, and other fin portions 9 are formed. On the other hand, one cut 5b is formed. The cut 5a is formed from the other end side to the one end side while leaving the portion 6 on the one end side in the width direction of the fin portion 9. The cut 5b is also formed from the other end side to the one end side, leaving the portion 6 on one end side in the width direction of the fin portion 9.

  Next, with respect to one fin portion 9, the cut 5 a is gradually widened from the other end side, and the fin 9 a located on one side across the cut 5 a is compared with the fin located on the other side across the cut 5 a. The main heat exchanger 12 and the auxiliary heat exchanger 13 are formed as shown in FIG. 11 by bending the part 9b by 180 ° and superimposing the fin part 9b on the fin part 9a.

  Next, with respect to the other fin portion 9, the cut 5b is gradually widened from the other end side, and the fin portion 9d located on the one side across the cut 5b is located on the other side across the cut 5b The heat exchanger 14 and the heat exchanger 15 connected to each other at the ends are manufactured by bending the 9c by a predetermined angle. By disposing the main heat exchanger 12, the auxiliary heat exchanger 13, and the heat exchangers 14 and 15 thus manufactured in the indoor unit, the heat exchanger 1 of the indoor unit is manufactured.

Modification 3
First, after the fin portion 9 is formed by laminating the fins 2, for example, as shown in FIG. 12, three cuts 5 a, 5 b, 5 c are formed for one fin portion 9. The cut 5a is formed from one end side to the other end side, leaving the portion 6 on the other end side in the width direction of the fin portion 9. Further, the cut line 5b is formed from the other end side toward the one end side while leaving the portion 6 on the one end side in the width direction of the fin portion 9. The cut 5c is also formed from the other end side to the one end side, leaving the portion 6 on the one end side in the width direction of the fin portion 9.

  Next, the cut 5a is gradually widened from one end side, and the fin portion 9b located on the one side across the cut 5a is bent 180 ° with the fin portion 9a located on the other side sandwiching the cut 5a. By superimposing the part 9a on the fin part 9b, as shown in FIG. 13, the main heat exchanger 12 and the auxiliary heat exchanger 13 are formed. Further, the cut line 5b is gradually widened from the other end side, and the fin portion 9c located on one side with the cut line 5b interposed therebetween is bent by a predetermined angle with respect to the fin portion 9b located on the other side with the cut line 5b interposed therebetween. Thus, another heat exchanger 14 connected to the main heat exchanger 12 at the end is manufactured.

  Then, the cut line 5b is gradually widened from the other end side, and the fin part 9d located on one side with the cut line 5b sandwiched between the fin part 9c located on the other side with the cut line 5b sandwiched by a predetermined angle. Only another heat exchanger 15 connected to the heat exchanger 14 at the end is manufactured by bending only. By arranging the main heat exchanger 12, the auxiliary heat exchanger 13, and the heat exchangers 14 and 15 thus manufactured in the indoor unit, the heat exchanger 1 of the indoor unit is manufactured.

  Although the case where the fin part constituting the heat exchanger of the air conditioner described above is cut in the width direction and bent is described as an example, the cut line is not limited to this, and the fin is added in the width direction. A cut may be formed along the direction in which the line extends. Some examples will be described below as modified examples 4 to 5.

Modification 4
First, after the fin portion 9 is formed by laminating the fins 2, for example, as shown in FIG. 14, four cuts 5 a, 5 b, 5 c, 5 d are formed in the fin portion 9. The cuts 5a and 5d are formed from the other end side toward the one end side while leaving the portion 6 on the one end side in the width direction of the fin portion 9. Further, the cut line 5b is formed from one end side to the other end side while leaving the portion 6 on the other end side in the width direction of the fin portion 9. The cut 5c is formed along the direction in which the fin portion 9 extends between the cut 5b and the cut 5d. In this case, in particular, the number of rows of heat transfer tubes of the heat exchanger formed by the cut 5c is one row.

  Next, the cut line 5b is gradually widened from one end side, and the fin part 9c located on the other side across the cut line 5b is bent 180 ° with respect to the fin part 9d located on the one side across the cut line 5b. By superimposing the part 9c on the fin part 9d, as shown in FIG. 15, the main heat exchanger 12 and the auxiliary heat exchanger 13 are formed.

  Further, the main heat exchanger 12 and the end portion are bent by bending the fin portion 9e located on the other side across the cut 5a with respect to the fin portion 9d located on the one side across the cut 5a. The other heat exchanger 14 connected in is manufactured.

  Further, with respect to the portion of the fin portion 9 cut off by the cuts 5b, 5d, 5c, the cut 5d is gradually widened from the other end side, and the cut 5d is formed with respect to the fin portion 9a located on one side across the cut 5d. As shown in FIG. 15, another main heat exchanger 12 and auxiliary heat exchanger 13 are folded by bending the fin portion 9b positioned on the other side of the plate by 180 ° and superimposing the fin portion 9b on the fin portion 9a. Is formed.

  By arranging the two sets of the main heat exchange 12 and auxiliary heat exchanger 13 and the other heat exchanger 14 thus manufactured in the indoor unit, the heat exchanger 1 of the indoor unit is manufactured. In this heat exchanger 1, the number of rows of heat transfer tubes of the main heat exchanger 12 is two rows, for example, and the number of rows of heat transfer tubes of the auxiliary heat exchanger 13 is one row. The number of rows is the number of rows of heat transfer tubes arranged in the width direction of the fin portion. The number of rows described above is an example, and a predetermined cut is provided along the direction in which the fin portion 9 extends. Thus, the number of rows of heat transfer tubes can be increased or decreased with respect to the initial number of rows.

Modification 5
First, after the fin portion 9 is formed by laminating the fins 2, for example, as shown in FIG. 16, three cuts 5 a, 5 b, 5 c are formed in the fin portion 9. The cut 5a is formed from the other end side to the one end side while leaving the portion 6 on the one end side in the width direction of the fin portion 9. Further, the cut 5b is formed from one end side to the other end side, leaving the portion 6 on one end side in the width direction of the fin portion 9 and the portion 6 on the other end side. The cut 5c is formed along the direction in which the fin portion 9 extends between the cut 5b and one end portion in the extending direction of the fin portion 9. In this case, in particular, the number of rows of heat transfer tubes of the heat exchanger formed by the cut 5c is one row.

  Next, the cuts 5c and 5b are gradually widened, and the fins 9c located on one side with the cut 5b sandwiched between them are positioned on the other side with the cut 5b and separated by the cuts 5c and 5b. As shown in FIG. 17, the main heat exchanger 12 and the auxiliary heat exchanger 13 are formed by bending the part 9b by 180 ° and superimposing the fin part 9b on the fin part 9c.

  Next, by bending the fin portion 9c located on one side across the cut 5b, the fin portion 9a located on the other side across the cut 5b and partitioned by the cut 5c, 5b is bent by a predetermined angle. The other heat exchanger 14 connected to the main heat exchanger 12 at the end is manufactured.

  Furthermore, by bending the fin portion 9d located on the other side across the cut 5a with respect to the fin portion 9c located on the one side across the cut 5a, the main heat exchanger 12 and the end portion are bent at a predetermined angle. A further connected heat exchanger 15 is produced.

  The heat exchanger 1 of the indoor unit is manufactured by disposing the set of main heat exchanger 12 and auxiliary heat exchanger 13 and the other two heat exchangers 14 and 15 thus manufactured in the indoor unit. become. In this heat exchanger 1, the number of rows of heat transfer tubes of the main heat exchanger 12 is two rows, for example, and the number of rows of heat transfer tubes of the auxiliary heat exchanger 13 is one row.

  As described above, in addition to the main heat exchanger and the auxiliary heat exchanger, other heat exchangers connected to the main heat exchanger are also formed by bending the fin portion, thereby improving the productivity of the heat exchanger. Can be improved.

Embodiment 2
Here, the variation of the slit provided in the fin which comprises the fin part of each heat exchanger mentioned above is demonstrated. As shown in FIG. 18, each fin 2 constituting the fin portion is formed with a slit 4 by punching out a portion between the opening 3 and the opening 3 through which the heat transfer tube is inserted. As shown in FIG. 19, the slit 4 is formed so that a punched portion is positioned between adjacent fins 2 in a state where a plurality of fins 2 are stacked.

  By disposing the slits 4 between the fins 2 and 2 that are stacked, the air passing between the fins 2 and 2 is disturbed by the slits 4, and is a region away from the surface of the fins 2. The air flows while entraining the air passing through. Thereby, the air which passes each surface of the fin 2 and each temperature difference of the fin 2 can be kept larger. Further, the heat transfer area of the fin 2 is increased by the slit 4. As a result, the heat exchange efficiency of the heat exchanger is improved.

  Thus, while the slit 4 has an important role in improving the heat exchange rate of the heat exchanger, the slit 4 is located between the fin 2 and the fin 2 through which air passes, so that the ventilation resistance is reduced. Become. For this reason, it is necessary to set a more appropriate ventilation resistance based on the overall flow (macro flow) of the air taken into the indoor unit, the efficiency of heat exchange, and the like.

  Therefore, a predetermined number of slits or slits having a predetermined shape corresponding to the heat exchangers respectively disposed at predetermined positions in the indoor unit are formed in advance at predetermined positions of the fins (see FIG. 2). By laminating the fins, a fin portion is formed, and a predetermined cut is formed in the fin portion (see FIGS. 2 to 4). By widening the cut and overlapping the other fin portion located on the other side with the one fin portion located on the one side across the cut, for example, as shown in FIG. Different main heat exchangers 12 and auxiliary heat exchangers 13 are produced. The arrows indicate the direction of air flow.

  In addition, when a cut along the direction in which the fin portion extends is also formed, by expanding the cut (see FIGS. 14 to 17), for example, as shown in FIG. 21, the number of rows of heat transfer tubes The main heat exchanger 12 and the auxiliary heat exchanger 13 having different numbers of slits 4 are manufactured.

  As described above, the slits corresponding to the heat exchanger to be disposed are formed in the fin in advance, so that the performance of the heat exchanger can be sufficiently exhibited. In addition, a predetermined cut is provided in the fin portion in which the fins having such slits are laminated, and the other fin portion is bent with respect to the one fin portion based on the cut. The productivity of the heat exchanger can be improved by superimposing the part on one fin part.

  The embodiment disclosed this time is an example, and the present invention is not limited to this. The present invention is defined by the terms of the claims, rather than the scope described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a perspective view which shows 1 process of the manufacturing method of the heat exchanger which concerns on Embodiment 1 of this invention. FIG. 2 is a side view showing a step performed after the step shown in FIG. 1 in the same embodiment. FIG. 3 is a partial perspective view in the step shown in FIG. 2 in the same embodiment. FIG. 4 is a partial perspective view showing a process performed after the process shown in FIGS. 2 and 3 in the embodiment. FIG. 5 is a partial perspective view showing a process performed after the process shown in FIG. 4 in the same embodiment. FIG. 6 is a partial perspective view showing a process performed after the process shown in FIG. 5 in the same embodiment. FIG. 7 is a partial perspective view showing a process performed after the process shown in FIG. 6 in the same embodiment. In the embodiment, it is a top view which shows 1 process of the manufacturing method which concerns on the modification 1. FIG. FIG. 9 is a plan view showing a step performed after the step shown in FIG. 8 in the same embodiment. In the embodiment, it is a top view which shows 1 process of the manufacturing method which concerns on the modification 2. FIG. FIG. 11 is a plan view showing a step performed after the step shown in FIG. 10 in the same embodiment. In the same embodiment, it is a top view which shows 1 process of the manufacturing method which concerns on the modification 3. FIG. FIG. 13 is a plan view showing a step performed after the step shown in FIG. 12 in the same embodiment. In the same embodiment, it is a top view which shows 1 process of the manufacturing method which concerns on the modification 4. FIG. FIG. 15 is a plan view showing a step performed after the step shown in FIG. 14 in the same embodiment. In the same embodiment, it is a top view which shows 1 process of the manufacturing method which concerns on the modification 5. FIG. FIG. 17 is a plan view showing a step performed after the step shown in FIG. 16 in the same embodiment. It is a fragmentary perspective view which shows the fin which comprises the heat exchanger which concerns on Embodiment 2 of this invention, and its slit. FIG. 19 is a partial side view showing a state in which the fins shown in FIG. 18 are stacked in the same embodiment. In the same embodiment, it is the 1st top view showing the pattern of a slit. In the same embodiment, it is the 2nd top view showing the pattern of a slit.

Explanation of symbols

  1 heat exchanger, 2 fins, 3 openings, 4 slits, 5, 5a, 5b, 5c, 5d cuts, 7 heat transfer tubes, 8 end plates, 8a claw portions, 9, 9a, 9b, 9c, 9d, 9e fins Parts, 10 first fin part, 11 second fin part, 12 main heat exchanger, 13 auxiliary heat exchanger, 14, 15 heat exchanger, 20 cross flow fan.

Claims (2)

Fan for feeding takes in air, an air conditioner having a first heat exchanger and the second heat exchanger,
The first heat exchanger is
A first fin portion ;
A first pipe group arranged to penetrate through the first fin portion for flowing a predetermined refrigerant ;
The second heat exchanger is
A second fin portion ;
A second piping group arranged to penetrate the second fin portion and for flowing a predetermined refrigerant ;
In the first heat exchanger and the second heat exchanger, respectively extend with a predetermined width, a plurality of which are arranged to superimpose them at a predetermined interval so as to circulate the air in the fin, the predetermined cut formed so as to be connected at the other end portion while being formed toward the other end from one end of each of the width direction of the plurality of the fins in the middle in the direction the extending The plurality of fin portions positioned on one side with the sandwiched portion as the first fin portion, and the plurality of fin portions positioned on the other side sandwiching the cut with the second fin portion, to expand the cut from the one end, by folding 180 ° and the second fin portion with respect to the first fin portion, as superimposing the second heat exchanger on the windward side of the first heat exchanger Arrange With a main heat exchanger the first heat exchanger, the second heat exchanger and the auxiliary heat exchanger,
In the main heat exchanger, the first piping group is arranged in a plurality of rows in the width direction of the plurality of fin portions forming the first fin portion,
In the auxiliary heat exchanger, the second piping group has the same number of rows as the plurality of rows of the first piping group or less in the width direction of the plurality of fin portions forming the second fin portion. Air conditioner arranged in rows . The first fin portion has a first end plate;
The second fin portion has a second end plate;
By bending the second fin portion 180 ° with respect to the first fin portion and the first end plate and the second end plate are locked, the main heat exchanger and the auxiliary heat exchanger, The air conditioner according to claim 1, wherein the air conditioners are locked in a state of being overlapped .

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