JP5761149B2 - Heat exchanger fixing plate and indoor unit - Google Patents

Description

  The present invention relates to a heat exchanger fixing plate that fixes an end portion of a heat exchanger, and an indoor unit including the heat exchanger fixing plate.

  Conventionally, there is a heat exchanger fixing plate for fixing an end portion of a heat exchanger having heat transfer tubes arranged in a plurality of rows in the air flow direction. In this heat exchanger fixing plate, insertion portions into which the hairpin portions of the heat transfer tubes are inserted and fixed are formed separately so as to correspond to the positions of the hairpin portions. In addition, some heat exchangers include a mixture of heat transfer tubes having different tube diameters and pitches (see, for example, FIG. 3 of Patent Document 1). In this case, the shape (size) of the hairpin portion is Since it differs depending on each hairpin part, the shape (length and width) of the insertion part also differs depending on each insertion part.

JP 2011-106762 A

  By the way, the number of rows of heat transfer tubes may differ depending on the type of heat exchanger. In such a case, it is preferable that heat exchangers having different numbers of rows of heat transfer tubes can be fixed with a common heat exchanger fixing plate from the viewpoint of cost and the like. However, in the conventional heat exchanger fixing plate, the insertion part into which each hairpin part is inserted is formed separately according to the position and shape of each hairpin part, so the number of rows of heat transfer tubes is different. If the position of the insertion part does not correspond to the position of each hairpin part or if heat exchanger tubes with different pipe diameters and pitches are mixed in the heat exchanger, the shape of the insertion part and the shape of each hairpin part May not be supported. In these cases, there is a problem that heat exchangers having different numbers of rows of heat transfer tubes cannot be fixed with a common heat exchanger fixing plate.

  Accordingly, an object of the present invention is to provide a heat exchanger fixing plate that can be used in common even when the number of rows of heat transfer tubes provided in the heat exchanger is different.

A heat exchanger fixing plate according to a first aspect of the present invention is a heat exchanger fixing plate for fixing an end portion of a heat exchanger having heat transfer tubes arranged in a plurality of rows in the air flow direction, and is disposed on the most windward side. A windward side insertion part into which the hairpin part of the heat transfer tube is inserted, and a leeward side insertion part that is arranged on the leeward side of the windward side insertion part and into which the hairpin part of the heat transfer tube is inserted, leeward insert, its length, at least two of the hairpin portion is a possible length inserted adjacent in a direction opposite to the flow direction of the air, the width of state, and are equal to or greater than the width of the windward insertion portion The heat exchanger includes a first heat transfer tube disposed on the most windward side, and a second heat transfer tube disposed on the leeward side of the first heat transfer tube, and the first heat transfer tube is disposed on the windward side. When inserted into the upper insertion portion and the second heat transfer tube is inserted into the leeward insertion portion, Serial first heat exchanger tube is characterized in that there is a case that is inserted into the leeward side insertion portion.

  In this heat exchanger fixing plate, the length of the leeward side insertion portion is such that at least two hairpin portions adjacent in the direction opposite to the air flow direction can be inserted, and the width of the leeward side insertion portion is the windward insertion. Since it is more than the width of a part, the hairpin part of the heat exchanger tube inserted in a windward side rather than a leeward side insertion part can be inserted in a leeward side insertion part. Therefore, even if the number of rows of heat transfer tubes is different, the heat exchanger fixing plate can be shared.

A heat exchanger fixing plate according to a second aspect of the present invention is the heat exchanger fixing plate according to the first aspect of the invention, wherein the heat exchanger includes a tube diameter and pitch of the first heat transfer tube and a tube of the second heat transfer tube. The diameter and the pitch are different .

  In this heat exchanger fixing plate, when the tube diameter and pitch of the first heat transfer tube and the second heat transfer tube are different, the first heat transfer tube is inserted into the windward insertion portion, and the second heat transfer tube is inserted into the leeward insertion portion. Since there is a case where the first heat transfer tube is inserted into the leeward side insertion portion, even if the tube diameter and pitch of the first heat transfer tube and the second heat transfer tube are different, heat exchange is performed. The instrument fixing plate can be shared.

  A heat exchanger fixing plate according to a third invention is characterized in that, in the heat exchanger fixing plate according to the second invention, the tube diameter of the first heat transfer tube is larger than the tube diameter of the second heat transfer tube. And

  In this heat exchanger fixing plate, even if the tube diameter of the first heat transfer tube is larger than the tube diameter of the second heat transfer tube, the heat exchanger fixing plate can be shared.

  The heat exchanger fixing plate according to a fourth aspect of the present invention is the heat exchanger fixing plate according to any one of the first to third aspects of the invention, wherein the leeward side insertion portion is a side where the hairpin portion of the heat transfer tube is inserted. The end opposite to the end is substantially closed.

  In this heat exchanger fixing plate, the end portion on the opposite side of the end portion on the side where the hairpin portion of the heat transfer tube is inserted is substantially closed in the leeward side insertion portion. Will improve. Therefore, it is possible to suppress a decrease in rigidity of the heat exchanger fixing plate due to the formation of the leeward side insertion portion.

  An indoor unit according to a fifth aspect includes the heat exchanger fixing plate according to any one of the first to fourth aspects.

  In this indoor unit, even when the number of rows of heat transfer tubes provided in the heat exchanger is different, an indoor unit including a heat exchanger fixing plate that can be used in common can be provided.

  As described above, according to the present invention, the following effects can be obtained.

  In the first invention, the length of the leeward side insertion portion is such that at least two hairpin portions adjacent to each other in the direction opposite to the air flow direction can be inserted, and the width of the leeward side insertion portion is the length of the leeward side insertion portion. Since it is more than a width | variety, the hairpin part of the heat exchanger tube inserted in a windward side rather than a leeward side insertion part can be inserted in a leeward side insertion part. Therefore, even if the number of rows of heat transfer tubes is different, the heat exchanger fixing plate can be shared.

  In the second invention, when the tube diameter and pitch of the first heat transfer tube and the second heat transfer tube are different, the first heat transfer tube is inserted into the windward insertion portion, and the second heat transfer tube is inserted into the leeward insertion portion. Since there is a case where the first heat transfer tube is inserted into the leeward side insertion portion, the heat exchanger is fixed even if the tube diameter and pitch of the first heat transfer tube and the second heat transfer tube are different. The board can be shared.

  In 3rd invention, even if it is a case where the tube diameter of a 1st heat exchanger tube is larger than the tube diameter of a 2nd heat exchanger tube, a heat exchanger fixing plate can be shared.

  In the fourth aspect of the invention, since the end of the leeward side insertion portion that is opposite to the end on the side where the hairpin portion of the heat transfer tube is inserted is substantially closed, the rigidity of the leeward side insertion portion is improved. To do. Therefore, it is possible to suppress a decrease in rigidity of the heat exchanger fixing plate due to the formation of the leeward side insertion portion.

  In 5th invention, even if it is a case where the number of rows of the heat exchanger tubes provided in the heat exchanger differs, an indoor unit provided with a heat exchanger fixing plate that can be used in common can be provided.

It is an external view of the indoor unit according to the embodiment of the present invention. It is sectional drawing of the indoor unit shown in FIG. It is a perspective view of the heat exchanger shown in FIG. It is a perspective view of a heat exchanger and a heat exchanger fixing plate. It is the perspective view which looked at the heat exchanger fixing plate from the surface side. It is the perspective view which looked at the heat exchanger fixing plate from the back side. It is the side view which looked at the heat exchanger fixing plate from the back side. (A) is the A section enlarged view of the heat exchanger fixing plate shown in FIG. 7, (b) is the B section enlarged view. It is sectional drawing of a heat exchanger and a heat exchanger fixing plate. FIG. 4 is a perspective view of a heat exchanger in which the number of rows of heat transfer tubes is smaller than that of the heat exchanger illustrated in FIG. 3. It is a perspective view of the heat exchanger and heat exchanger fixing plate which are shown in FIG. It is sectional drawing of the heat exchanger and heat exchanger fixing plate which are shown in FIG. It is the side view which looked at the heat exchanger fixing plate which concerns on a modification from the back side.

  Hereinafter, an air conditioner according to an embodiment of the present invention will be described with reference to the drawings.

[Configuration of indoor unit 1]
The heat exchanger fixing plate 7 according to the embodiment of the present invention is applied to the indoor unit 1 of an air conditioner. As shown in FIG. 1, the indoor unit 1 has an elongated shape in one direction as a whole, and is installed on a wall surface in the room so that its longitudinal direction is horizontal. The indoor unit 1 constitutes an air conditioner together with an outdoor unit (not shown), and performs indoor air conditioning. In the following description, the direction protruding from the wall to which the indoor unit 1 is attached is referred to as “front”, and the opposite direction is referred to as “rear”. Further, the left-right direction shown in FIG. 1 is simply referred to as “left-right direction”.

  As shown in FIG. 2, the indoor unit 1 includes a casing 2 and internal devices such as a heat exchanger 3, a blower fan 4, a filter 5, and an electrical component box (not shown) housed in the casing 2. . A suction port 2 a is formed on the upper surface of the casing 2, and an air outlet 2 b is formed on the lower surface of the casing 2. In the vicinity of the air outlet 2b, a horizontal flap 6 for adjusting the wind direction in the vertical direction and opening and closing the air outlet 2b is disposed. The blower fan 4 is disposed such that its axial direction is along the horizontal direction. The blower fan 4 is configured to suck air from above and blow it downward.

[Heat exchanger 3]
The heat exchanger 3 is disposed so as to surround the front, upper, and rear of the blower fan 4. During the air conditioning operation, the indoor fan is sucked from the suction port 2a by the driving of the blower fan 4, and the sucked air is heated or cooled in the heat exchanger 3 and then blown out from the blower outlet 2b. ing.

  This heat exchanger 3 has an inverted V-shaped cross-sectional shape divided into a front heat exchanger 11 and a rear heat exchanger 12. The front heat exchanger 11 includes a first heat exchanger 13, a second heat exchanger 14, and a third heat exchanger 15, and performs the first heat exchange with respect to the air flow direction (the arrow direction in FIG. 2). The heat exchanger 13, the second heat exchanger 14, and the third heat exchanger 15 are arranged in this order. Therefore, a part of the room air sucked from the suction port 2a passes through the first heat exchanger 13, the second heat exchanger 14, and the third heat exchanger 15 in this order, and reaches the outlet 2b side. The rear heat exchanger 12 includes a fourth heat exchanger 16 and a fifth heat exchanger 17, and the fourth heat exchanger 16, the fourth heat exchanger 16 with respect to the air flow direction (the arrow direction in FIG. 2). The five heat exchangers 17 are arranged in this order. Therefore, a part of the indoor air sucked from the suction port 2a passes through the fourth heat exchanger 16 and the fifth heat exchanger 17 in order, and reaches the outlet 2b side.

  Each of the heat exchangers 13 to 17 has a plurality of heat transfer tubes extending in the axial direction (left-right direction) of the blower fan 4. The first heat exchanger 13 arranged on the most windward side of the front heat exchanger 11 has heat transfer tubes 13a (first heat transfer tubes) arranged in one row and 12 stages, and the second heat exchanger 14 is It has heat transfer tubes 14a (second heat transfer tubes) arranged in one row and 14 stages, and the third heat exchanger 15 has heat transfer tubes 15a arranged in three rows and 14 stages. The fourth heat exchanger 16 arranged on the most windward side of the rear heat exchanger 12 has the heat transfer tubes 16a arranged in one row and eight stages, and the fifth heat exchanger 17 comprises two rows 10 The heat transfer tubes 17a are arranged in stages.

  Here, the heat transfer tubes (13a, 16a, 17a) have the same tube diameter and pitch, respectively. Specifically, the tube diameter (diameter) is 6 mm, and the pitch is 18 mm. The heat transfer tubes (14a, 15a) have the same tube diameter and pitch. Specifically, the tube diameter (diameter) is φ4 mm, and the pitch is 15 mm. Therefore, the tube diameter and pitch of the heat transfer tubes (14a, 15a) are smaller than the tube diameter and pitch of the heat transfer tubes (13a, 16a, 17a). Note that the pitch of the heat transfer tubes refers to the distance from the center to the center of two heat transfer tubes adjacent in the step direction. In the present application, the row direction refers to the air flow direction (arrow direction in FIG. 2), and the step direction refers to the longitudinal direction of each heat exchanger (perpendicular to the arrow direction on the paper surface in FIG. 2). direction).

  As shown in FIG. 3, the heat transfer tubes 13 a to 17 a of the heat exchanger 3 are formed with a number of hairpin portions 20 bent in a U shape at the left end portion 3 </ b> L of the heat exchanger 3. The hairpin portion 20 is a hairpin portion 23 (23A to 23F) formed by a heat transfer tube 13a provided in the first heat exchanger 13, and a hairpin formed by a heat transfer tube 14a provided in the second heat exchanger 14. Part 24 (24A to G), a hairpin part 25 formed by the heat transfer pipe 15a provided in the third heat exchanger 15, a hairpin part 26 formed by the heat transfer pipe 16a provided in the fourth heat exchanger 16, The hairpin portion 27 is formed by a heat transfer tube 17 a provided in the fifth heat exchanger 17.

  In addition, a number of hairpin portions bent in a U shape are similarly formed at the right end (not shown) of the heat exchanger 3. As a result, the heat transfer tubes are continuous in the step direction. Moreover, each heat exchanger 13-17 is laminated | stacked for every micro space | interval along the axial direction (left-right direction) of the ventilation fan 4, and has the fin F which penetrates the heat exchanger tubes 13a-17a.

[Heat exchanger fixing plate 7]
The left end portion 3L of the heat exchanger 3 is fixed by a resin heat exchanger fixing plate 7 as shown in FIG. The heat exchanger 3 is fixed to the casing 2 by fixing the heat exchanger fixing plate 7 to the casing 2.

  As shown in FIGS. 4 to 9, the heat exchanger fixing plate 7 is formed on a plate-like base portion 31 facing the left end 3L of the heat exchanger 3 on the back surface 31B side, and the plate-like base portion 31, and each hairpin. It has many insertion parts 30 in which the part 20 is inserted.

  The plurality of insertion portions 30 include a first insertion portion 32 (windward insertion portion), a second insertion portion 33 (leeward side insertion portion), a third insertion portion 34, a fourth insertion portion 37, a fifth insertion portion 38, and Divided into a sixth insertion portion 39. And by inserting each hairpin part 20 into these 1st insertion parts 32-6th insertion part 39, as shown in Drawing 9, all the hairpin parts 20 of the heat exchanger tube provided in heat exchanger 3 are It is in a state of being inserted into any of the insertion portions 30.

  Hereinafter, the first insertion portion 32 to the sixth insertion portion 39 will be described in detail.

<First insertion portion 32>
The first insertion portion 32 (32 </ b> A to 32 </ b> F) is disposed on the uppermost wind side of the plate-like base portion 31 and in front of the blower fan 4. Hairpin portions 23 (23A to 23F) of heat transfer tubes 13a (first heat transfer tubes) provided in the first heat exchanger 13 are inserted into the first insertion portions 32, respectively. Note that the width W1 (see FIG. 8A) of the first insertion portion 32 is at least larger than the diameter (φ6 mm) of the heat transfer tube 13a so that the hairpin portion 23 of the heat transfer tube 13a can be inserted.

  As can be understood from FIG. 4, the first insertion portion 32 is substantially closed on the surface 31 </ b> F side of the plate-like base portion 31. As a result, the indoor air sucked from the suction port 2a is prevented from bypassing the air outlet 2b without passing through the filter 5 and the hairpin portion 23 being deformed by receiving an impact. The first insertion portion 32 has a pore 32a for draining and drying.

<Second insertion portion 33>
The second insertion portion 33 (33A, 33B) is arranged on the leeward side of the first insertion portion 32, and the hairpin portion 24 (24A) of the heat transfer tube 14a (second heat transfer tube) provided in the second heat exchanger 14. ~ 24F) is inserted.

  As shown in FIG. 9, four hairpin portions 24A to 24D are inserted into the second insertion portion 33A. This 2nd insertion part 33A is a long hole as shown to Fig.8 (a), The length L2 is four hairpin parts 24A-24D adjacent to the step direction (direction opposite to the air flow direction). Is the length that can be inserted. That is, it is made longer than the length from the one end of four hairpin parts 23A-23D to the other end. Further, the second insertion portion 33A has a width W2 equal to or greater than the width W1 of the first insertion portion 32 (in FIG. 8A, the width W2 is the same as the width W1). In addition, as shown in FIG. 11, hairpin part 23A-23C of the heat exchanger tube 13a provided in the 1st heat exchanger 13 may be inserted in this 1st insertion part 33A. Therefore, the length L2 of the first insertion portion 33A is also set such that three hairpin portions 23A to 23C can be inserted.

  Moreover, the two hairpin parts 24E and 24F and the hairpin part 25 of the heat transfer tube 15a are inserted into the second insertion part 33B. The second insertion portion 33B is a long hole as shown in FIG. 8B, and its length L3 is set such that two hairpin portions 24E and 24F adjacent in the step direction can be inserted. That is, it is made longer than the length from the one end of two hairpin parts 24E and 24F to the other end. Further, although the width varies depending on the position, the width is equal to or larger than the width W1 of the first insertion portion 32 at any position (in FIG. 8B, the width W3 is the same as the width W1).

  In addition, the length of the 2nd insertion part 33 means the length of the direction which corresponds with the step direction of the heat exchanger tube 14a more correctly here, and the width | variety of the 2nd insertion part 33 more correctly, The width in a direction that is parallel to the plate-like base portion 31 and orthogonal to the direction that coincides with the step direction of the heat transfer tube 14a.

  As for the 2nd insertion part 33, the surface 31F side (end part on the opposite side to the edge part by which the hairpin part 24 is inserted) of the plate-shaped base 31 is obstruct | occluded substantially. As a result, a decrease in rigidity of the heat exchanger fixing plate 7 due to the second insertion portion 33 being formed in the elongated hole is suppressed. The second insertion portion 33 is formed with a pore 33a for draining and drying. Two pores 33a are formed in the second insertion portion 33A and three in the second insertion portion 33B.

<Third insertion portion 34>
A plurality of third insertion portions 34 are arranged on the leeward side of the second insertion portion 33, and the hairpin portion 25 of the heat transfer tube 15 a provided in the third heat exchanger 15 is inserted therein. As can be understood from FIG. 5, the third insertion portion 34 has two types of shapes, that is, a long hole type insertion portion 35 and a parallelogram type insertion portion 36. Six each of the long hole type insertion portions 35 and the parallelogram type insertion portions 36 are formed. One hairpin portion 25 is inserted into the long hole-type insertion portion 35, and two hairpin portions 25, 25 adjacent in the row direction are inserted into the parallelogram-type insertion portion 36. In addition, the parallelogram-shaped insertion portion 36 has a wall portion 36a and prevents the hairpin portion 25 from being deformed by receiving an impact.

<Fourth insertion portion 37>
A plurality of the fourth insertion portions 37 are arranged on the uppermost wind side of the plate-like base portion 31 and behind the blower fan 4, and each of the hairpin portions 26 of the heat transfer tubes 16 a provided in the fourth heat exchanger 16 is one. Inserted one by one. As can be understood from FIG. 5, the fourth insertion portion 37 is substantially closed on the surface 31 </ b> F side of the plate-like base 31. In addition, the fourth insertion portion 37 is formed with a pore 37a for draining and drying.

<Fifth insertion portion 38>
A plurality of fifth insertion portions 38 are arranged on the leeward side of the fourth insertion portion 37, and the hairpin portions 27 of the heat transfer tubes 17a provided in the fifth heat exchanger 17 are inserted one by one or two by two. A part of the fifth insertion portion 38 has a wall portion 38a as can be understood from FIG. 5, and the hairpin portion 27 is prevented from being deformed by an impact.

<6th insertion part 39>
The 6th insertion part 39 is arrange | positioned between 2nd insertion part 33A, 33B, and the hairpin part 24G of the heat exchanger tube 14a provided in the 2nd heat exchanger 14 is inserted. In addition, as shown in FIG. 11, the hairpin part 23D of the heat exchanger tube 13a provided in the 1st heat exchanger 13 may be inserted in this 6th insertion part 39. As shown in FIG. Therefore, the length and width of the sixth insertion portion 39 are substantially the same as the length and width of the first insertion portion 32.

  Next, the case where the heat exchanger fixing plate 7 is applied to an indoor unit provided with a heat exchanger different from the heat exchanger 3 will be described. This indoor unit is different from the heat exchanger 3 in the configuration of the heat exchanger, and the other configurations are the same as those in the indoor unit 1. In addition, about the part which is the same structure as the indoor unit 1, it attaches | subjects and demonstrates the same code | symbol.

  As shown in FIG. 10, the heat exchanger 53 accommodated in the indoor unit is obtained by removing the second heat exchanger 14 and the fourth heat exchanger 16 from the heat exchanger 3 described above. Therefore, in this heat exchanger 53, the number of rows of heat transfer tubes provided in the front heat exchanger 11 is reduced by one row to 4 rows compared to the heat exchanger 3, and is provided in the rear heat exchanger 12. The number of rows of heat transfer tubes is reduced by one row to two rows as compared with the heat exchanger 3. In addition, the 1st heat exchanger 13 of the heat exchanger 53 has shifted | deviated to 1 row leeward side by having removed the 2nd heat exchanger 14. FIG.

  As shown in FIG. 11, the left end portion 3 </ b> L of the heat exchanger 53 is fixed by the above-described heat exchanger fixing plate 7 as in the heat exchanger 3. The heat exchanger fixing plate 7 is fixed to the casing 2 of the indoor unit, so that the heat exchanger 53 is fixed to the casing 2 of the indoor unit.

  Here, as shown in FIG. 12, the hairpin portion 23 is inserted into the second insertion portion 33 in a state where the heat exchanger 53 is fixed to the heat exchanger fixing plate 7. Specifically, the hairpin portions 24A to 24C are inserted into the second insertion portion 33A, and the hairpin portions 24E and 24F are inserted into the second insertion portion 33B.

  Further, in a state where the heat exchanger 53 is fixed to the heat exchanger fixing plate 7, no hairpin portion 20 is inserted in the first insertion portion 32 and the fourth insertion portion 37. . Note that the hairpin portion 25 of the heat transfer tube 15 a provided in the third heat exchanger 15 and the hairpin portion 27 of the heat transfer tube 17 a provided in the fifth heat exchanger 17 are the same as in the case of the heat exchanger 3. The third insertion portion 34 and the fifth insertion portion 38 are inserted.

[Features of heat exchanger fixing plate 7 of this embodiment]
The heat exchanger fixing plate 7 of this embodiment has the following characteristics.

  In this heat exchanger fixing plate 7, at least two hairpin portions 20 adjacent to each other in the direction (step direction) in which the lengths L2 and L3 of the second insertion portion 33 (leeward side insertion portion) face the air flow direction are inserted. Since the width W2 and W3 of the second insertion portion 33A are equal to or greater than the width W1 of the first insertion portion 32 (windward insertion portion), the heat transfer tube 13a (first It is possible to insert the hairpin portion 23 of the (one heat transfer tube) into the second insertion portion 33. Therefore, the heat exchanger 3 and the heat exchanger 53 from which one row of heat transfer tubes is deleted from the heat exchanger 3 can be fixed by the common heat exchanger fixing plate 7.

  Further, in the heat exchanger fixing plate 7, when the tube diameter and pitch of the heat transfer tube 13a (first heat transfer tube) and the heat transfer tube 14a (second heat transfer tube) are different, the heat transfer tube 13a is connected to the first insertion portion 32 ( When the heat transfer tube 14a is inserted into the second insertion portion 33 (leeward side insertion portion) and when the heat transfer tube 13a is inserted into the second insertion portion 33 (leeward side insertion portion) Therefore, even if the tube diameters and pitches of the heat transfer tube 13a and the heat transfer tube 14a are different, the heat exchanger fixing plate 7 can be shared.

  Further, in the heat exchanger fixing plate 7, when the tube diameter of the heat transfer tube 13a is larger than the tube diameter of the heat transfer tube 14a, the heat transfer tube 13a is inserted into the first insertion portion 32, and the second insertion portion. Therefore, even if the diameter of the heat transfer tube 13a is larger than the diameter of the heat transfer tube 14a, the heat exchanger fixing plate 7 can be shared.

  Moreover, in this heat exchanger fixing plate 7, in the 2nd insertion part 33, the edge part (surface 31F side of the plate-shaped base 31) on the opposite side to the edge part by which the hairpin part 20 of a heat exchanger tube is inserted is provided. Since it is substantially closed, the rigidity of the second insertion portion 33 is improved. Therefore, it is possible to suppress a decrease in rigidity of the heat exchanger fixing plate 7 due to the second insertion portion 33 being formed in the long hole.

  Moreover, in the indoor unit of this embodiment, since the heat exchanger fixing plate 7 is provided, even when the number of rows of heat transfer tubes provided in the heat exchanger is different, it can be used in common. An indoor unit including the heat exchanger fixing plate 7 can be provided.

  As mentioned above, although embodiment of this invention was described, it should be thought that the specific structure of this invention is not limited to the said embodiment. The scope of the present invention is shown not only by the description of the above-described embodiment but also by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

[Modification]
In the present embodiment, the second insertion portion 33 (leeward side insertion portion) is formed on the leeward side of the first insertion portion 32 (leeward side insertion portion), but the second insertion portion 33 is the first insertion portion 33. What is necessary is just to be formed in the leeward side rather than the insertion part 32, for example, the 2nd insertion part 33 may be formed in the location in which the 3rd insertion part 34 is formed.

  Further, as shown in FIGS. 9 and 12, the second insertion portion 33 (leeward side insertion portion) has widths W2 and W3 that can be inserted into one row of hairpin portions. As shown in FIG. 2, the width may be a width in which two rows of hairpin portions 20 can be inserted. By doing so, when one row of heat transfer tubes located on the leeward side of the heat transfer tube 13a (first heat transfer tube) is deleted, it is inserted into the first insertion portion 32 regardless of whether two rows are deleted. The hairpin portion 23 of the heat transfer tube can be inserted into the second insertion portion 33. Moreover, the width | variety of the 2nd insertion part 33 may be made into the width | variety which can insert the hairpin part 20 of 3 or more rows.

  In the present embodiment, the length L2 of the second insertion portion 33 is set such that four hairpin portions 24A to 24D adjacent in the step direction can be inserted, and the length L3 is two adjacent in the step direction. Although the hairpin portions 24E and 24F can be inserted, the length may be any length as long as at least two hairpin portions 20 adjacent in the step direction can be inserted.

  Moreover, in this embodiment, although the tube diameter and pitch of the heat exchanger tube 13a are made larger than the tube diameter and pitch of the heat exchanger tube 14a, the tube diameter and pitch of the heat exchanger tube 13a are the tube diameter and pitch of the heat exchanger tube 14a. Or may be smaller than the pipe diameter and pitch of the heat transfer tubes 14a.

  Moreover, in this embodiment, although the 1st insertion part 32 and the 2nd insertion part 33 were arrange | positioned among the heat exchanger fixing plates 7 in the front side of the ventilation fan 4, the 1st insertion part 32 and the 2nd insertion part 33 may be formed on the rear side of the blower fan 4 in the heat exchanger fixing plate 7. Further, the first insertion portion 32 and the second insertion portion 33 may be formed on both the front side and the rear side of the blower fan 4.

  Further, the heat exchanger of the present embodiment has an inverted V-shaped cross section divided into a front heat exchanger 11 and a rear heat exchanger 12, and the heat exchanger fixing plate 7 is also substantially inverted V. It is shaped like a letter. However, the heat exchanger may be composed only of the front side heat exchanger 11 or may be composed only of the rear side heat exchanger 12. Further, the heat exchanger fixing plate may be disposed only on the front side of the blower fan 4 or may be disposed only on the rear side of the blower fan 4.

  Moreover, in this embodiment, although the 2nd insertion part 33 is substantially obstruct | occluded the edge part (back surface 31B side) on the opposite side to the edge part by which the hairpin part 20 of the heat exchanger tube is inserted, The second insertion portion 33 may be a through hole.

  In the present embodiment, the heat exchanger fixing plate 7 for fixing the left end portion 3L of the heat exchanger has been described. However, the heat exchanger fixing plate fixes the right end portion 3R of the heat exchanger. Alternatively, both ends 3L and 3R of the heat exchanger may be fixed.

  If this invention is utilized, even if it is a case where the number of rows of heat exchanger tubes is different, the heat exchanger fixing plate can be shared.

1 Indoor unit 3, 53 Heat exchanger 3L Left end (end)
7 Heat exchanger fixing plate 13a Heat transfer tube (first heat transfer tube)
14a Heat transfer tube (second heat transfer tube)
20 Hairpin part 32 1st insertion part (windward insertion part)
33 2nd insertion part (leeward side insertion part)

Claims (5)

A heat exchanger fixing plate for fixing an end portion of a heat exchanger having heat transfer tubes arranged in a plurality of rows in the air flow direction,
An upwind insertion portion that is disposed on the most windward side and into which the hairpin portion of the heat transfer tube is inserted;
Arranged on the leeward side of the windward side insertion part, comprising a leeward side insertion part into which the hairpin part of the heat transfer tube is inserted,
The leeward side insertion portion is
Its length, at least two of the hairpin portion is a possible length inserted adjacent in a direction opposite to the flow direction of the air, the width of state, and are equal to or greater than the width of the windward insertion portion,
The heat exchanger is
A first heat transfer tube arranged on the uppermost wind side;
A second heat transfer tube disposed on the leeward side of the first heat transfer tube,
A case where the first heat transfer tube is inserted into the leeward side insertion portion and the second heat transfer tube is inserted into the leeward side insertion portion;
The heat exchanger fixing plate, wherein the first heat transfer tube may be inserted into the leeward side insertion portion. The heat exchanger is
The heat exchanger fixing plate according to claim 1, wherein the tube diameter and pitch of the first heat transfer tube are different from the tube diameter and pitch of the second heat transfer tube .   The heat exchanger fixing plate according to claim 2, wherein a tube diameter of the first heat transfer tube is larger than a tube diameter of the second heat transfer tube.   The leeward side insertion portion is substantially closed at the end opposite to the end on the side where the hairpin portion of the heat transfer tube is inserted. The heat exchanger fixing plate according to the item.   An indoor unit comprising the heat exchanger fixing plate according to any one of claims 1 to 4.

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