JP2015031501A - Heat-exchanger stationary plate and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-exchanger stationary plate and an air conditioner capable of being commonly used for specifications with an auxiliary heat exchanger provided on the inside of a main heat exchanger and for the specifications without that and also capable of discharging the dew generated in an insertion place of a hair pin part in the auxiliary heat exchanger.SOLUTION: The heat-exchanger stationary plate comprises: a tabular proximal part 40a with its rear face opposing the side face of a heat-exchanger 10; insertion holes 41A to 41L, 42A to 42F, into which hair pin parts 20A to 20L, 21A to 21F of heat exchanger tubes 10b of a main heat exchanger 20 and a back surface heat exchanger 21 of the heat-exchanger 10 are respectively inserted; and grooves 63 into which each hair pin part of inside auxiliary heat exchangers 31A and 31B arranged the inside of an air channel, which is the downstream of the air flow passing through the heat-exchanger 10, formed on the rear face of the tabular proximal part 40a extending along the side face shape of the main heat exchanger 20 and the back surface heat exchanger 21. In the grooves 63, the end of the insertion direction of the hair pin parts is blocked and a dew recovery passage is formed by the grooves 63.

Description

  The present invention relates to a heat exchanger fixing plate and an air conditioner for fixing a heat exchanger of an air conditioner to a casing.

  Conventionally, in an air conditioner, a heat exchanger fixing plate for fixing the heat exchanger to the rear housing and preventing the sucked air from passing through the air passage without passing through the heat exchanger has been provided. Used. The heat exchanger fixing plate that can be used in common with the specification using the main heat exchanger and the auxiliary heat exchanger as the heat exchanger and the specification using only the main heat exchanger without using the auxiliary heat exchanger Yes (see, for example, Patent Document 1).

  If the heat exchanger fixing plate has an insertion hole for passing the hairpin part of the auxiliary heat exchanger in accordance with the specification using the auxiliary heat exchanger, the heat exchanger fixing plate will not use the auxiliary heat exchanger. When air is used, air that does not pass through the filter flows into the main heat exchanger from the insertion hole, and the fins and the refrigerant pipes become dirty. For this reason, in patent document 1, the insertion part in which the hairpin part of an auxiliary heat exchanger is inserted is provided, and the hairpin part is substantially obstruct | occluded by the insertion part.

Japanese Patent No. 5029544 (page 6, FIG. 6)

  In Patent Document 1, the auxiliary heat exchanger is provided outside the main heat exchanger, but the auxiliary heat exchanger may be provided inside the main heat exchanger. In other words, an auxiliary heat exchanger may be provided “inside the air passage” that is downstream in the flow direction of the intake air passing through the main heat exchanger. In this case, assuming that the insertion hole through which the hairpin part of the auxiliary heat exchanger is passed is formed in the heat exchanger fixing plate, the air flowing in from the insertion hole when used in the specification not using the auxiliary heat exchanger is Then, the air passes through the air passage without passing through the heat exchanger, causing the following problems.

  First, a temperature difference occurs between the air that has passed through the heat exchanger and the air that has not passed through the heat exchanger, and condensation occurs in the air passage. Normally, dew generated in the heat exchanger part is collected by a drain pan, but dew generated in the air passage other than the heat exchanger part cannot be collected. In addition, there is a problem that the dew that has not been collected drops from the lower part of the indoor unit casing of the air conditioner to the outside of the casing, or the dew flies out of the air passage and wets the periphery of the unit.

  In Patent Document 1, since it is assumed that the auxiliary heat exchanger is provided outside the main heat exchanger, the above-mentioned dew problem when the auxiliary heat exchanger is provided inside the air passage is not grasped at all. No countermeasures have been studied for this.

  The present invention has been made to solve the above-described problems, and can be used in common with a specification in which an auxiliary heat exchanger is provided inside the air passage and in a specification in which the auxiliary heat exchanger is not provided. An object of the present invention is to provide a heat exchanger fixing plate and an air conditioner capable of draining dew generated at the insertion portion of the part.

  A heat exchanger fixing plate according to the present invention is a heat exchanger fixing plate for fixing a side surface portion of a heat exchanger having a radiation fin and a heat transfer tube to a housing of an air conditioner, and the side surface portion of the heat exchanger A plate-like base portion opposite to the back surface, an insertion hole formed in the plate-like base portion into which the hairpin portion of the heat transfer tube of the main heat exchanger of the heat exchanger is inserted, and the main heat exchanger on the back surface of the plate-like base portion Each of the hairpin portions of the inner auxiliary heat exchanger that is formed to extend along the side surface shape and is disposed inside the air passage that is downstream of the air passing through the heat exchanger. The end of the hairpin in the insertion direction is closed and a dew recovery path is formed by the groove.

  According to the present invention, it is possible to use the auxiliary heat exchanger in the main heat exchanger with a specification that does not provide the auxiliary heat exchanger and the specification that does not provide the auxiliary heat exchanger, and the auxiliary heat exchanger is generated at the insertion portion of the hairpin portion. A heat exchanger fixing plate capable of draining dew can be obtained.

It is a whole perspective view of the indoor unit of the air conditioner using the heat exchanger fixing plate which concerns on Embodiment 1 of this invention. It is sectional drawing of the indoor unit of the air conditioner using the heat exchanger fixing plate which concerns on Embodiment 1 of this invention. It is a perspective view which shows the left side edge part of the indoor unit of the state which removed the front housing | casing and the heat exchanger fixing plate from the indoor unit of FIG. It is a perspective view which shows the left side edge part of the indoor unit of a state which removed the front housing | casing from the indoor unit of FIG. 2, and the heat exchanger fixing plate was attached. It is explanatory drawing of the attachment pattern of the main heat exchanger of the indoor unit of the air conditioner using the heat exchanger fixing plate which concerns on Embodiment 1 of this invention. It is structure explanatory drawing of the hairpin part of the heat exchanger provided in the indoor unit of the air conditioner using the heat exchanger fixing plate which concerns on Embodiment 1 of this invention. It is explanatory drawing of the attachment pattern of the auxiliary heat exchanger of the indoor unit of the air conditioner using the heat exchanger fixing plate which concerns on Embodiment 1 of this invention. It is explanatory drawing of the other attachment pattern of the auxiliary heat exchanger of the indoor unit of the air conditioner using the heat exchanger fixing plate which concerns on Embodiment 1 of this invention. It is a figure which shows the heat exchanger fixing plate which concerns on Embodiment 1 of this invention. It is the perspective view which looked at the heat exchanger fixing plate which concerns on Embodiment 1 of this invention from the back surface side. It is a perspective view of the state which attached the heat exchanger fixing plate to the hairpin part of the heat exchanger of FIG. 7B. It is explanatory drawing of the flow of dew in the air path inside the heat exchanger fixing plate which concerns on Embodiment 1 of this invention. It is the perspective view which cut | disconnected FIG. 9 by AA. It is AA sectional drawing of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by the form of drawing shown below. Moreover, the same code | symbol is attached | subjected to the same structure in each figure.

Embodiment 1 FIG.
FIG. 1 is an overall perspective view of an indoor unit of an air conditioner using a heat exchanger fixing plate according to Embodiment 1 of the present invention (front design panel opened state). FIG. 2 is a sectional view of the air conditioner indoor unit using the heat exchanger fixing plate according to Embodiment 1 of the present invention (front design panel closed state). FIG. 3 is a perspective view showing a left end portion of the indoor unit in a state where the front housing and the heat exchanger fixing plate are removed from the indoor unit of FIG. 2. FIG. 4 is a perspective view showing a left end portion of the indoor unit in a state where the front housing is removed from the indoor unit of FIG. 2 and a heat exchanger fixing plate is attached. FIG. 5 is an explanatory diagram of an attachment pattern of the main heat exchanger of the indoor unit of the air conditioner using the heat exchanger fixing plate according to Embodiment 1 of the present invention. Fig.5 (a) is the figure which looked at the state which attached the heat exchanger fixing plate to the left side part of the heat exchanger from the right side part side of the state which cut | disconnected the heat exchanger near the center. FIG.5 (b) is the perspective view which looked at Fig.5 (a) from the right side surface part side of the heat exchanger. FIG.5 (c) is the perspective view which looked at Fig.5 (a) from the left side surface part side of the heat exchanger. FIG. 6 is an explanatory diagram of the structure of the hairpin portion of the heat exchanger provided in the indoor unit of the air conditioner using the heat exchanger fixing plate according to Embodiment 1 of the present invention.

  An indoor unit of an air conditioner has a substantially box-shaped housing 3 including a rear housing 1 attached to a wall surface and a front housing 2 attached to the front surface of the rear housing 1. 2, an openable / closable design panel 4 is attached. A suction port 3A is provided on the upper surface of the front housing 2, and a blower outlet 3B is provided at the lower portion of the front housing 2. The wind outlet 3B is provided with a wind improvement mechanism that controls the direction of the blown air. A change plate 5 is provided.

  In the housing 3, there are provided a blower 6 and a heat exchanger 10 for blowing air. In the housing 3, the heat exchanger 10 is further provided on the front surface of the heat exchanger 10. The filter 7 removes dust and the like from the air flowing into the heat exchanger 10. The heat exchanger 10 is provided below the heat exchanger 10. And a drain pan 8 for collecting the condensed water.

  As shown in FIG. 6, the heat exchanger 10 is configured to include a heat radiating fin 10 a and a heat transfer tube 10 b through which a working refrigerant (hereinafter referred to as a refrigerant) passes. A plurality of heat radiating fins 10a are arranged side by side, and heat transfer tubes 10b are inserted perpendicularly to the heat radiating fins 10a. The heat transfer tubes 10b are provided in a plurality of stages in the step direction (vertical direction in FIG. 2) perpendicular to the suction air passage direction and in a row direction that is the suction air passage direction. In the heat transfer tube 10b, a hairpin portion 10ba bent by 180 ° protrudes from the end portion of the heat radiating fins 10a arranged side by side. Moreover, although the edge part (right side edge part in the example of illustration) on the opposite side to the hairpin part 10ba of the heat exchanger tube 10b is opening, the opening part of adjacent heat exchanger tubes 10b was bent in another U shape. They are connected by a connecting pipe (not shown).

  The heat exchanger 10 includes a main heat exchanger 20 disposed on the front side and a back heat exchanger 21 disposed on the back side. The main heat exchanger 20 and the back heat exchanger 21 may be integrated or separate. In the following, the downstream of the suction air in the flow direction is referred to as “wind path inner side 11”, and the upstream of the suction air in the flow direction is referred to as “wind path outer side 12”. Specifically, the inner side (blower 6 side) is the air path inner side 11 and the outer side is the air path outer side with the end faces 20a and 21a (see FIG. 2) of the main heat exchanger 20 and the rear heat exchanger 21 on the air blower 6 side as boundaries. 12 A dotted line indicates a boundary line 13 (hereinafter referred to as a wind path inner / outer boundary line).

  The heat exchanger 10 includes a main heat exchanger 20 as a basic configuration, and appropriately includes a back heat exchanger 21 and an auxiliary heat exchanger 30 (30A to 30C) according to the capacity required by the indoor unit of the air conditioner. It is attached. There are several types of attachment patterns of the auxiliary heat exchanger 30 depending on the capacity required by the indoor unit of the air conditioner. Examples of the attachment patterns are shown in FIGS. 7A and 7B below. The “heat exchanger 10” refers to a general term of a configuration in which only the main heat exchanger 20 is provided or a configuration in which the back heat exchanger 21 and the auxiliary heat exchanger 30 are further provided according to the mounting pattern. .

  FIG. 7A is an explanatory diagram of an attachment pattern of an auxiliary heat exchanger for an indoor unit of an air conditioner that uses the heat exchanger fixing plate according to Embodiment 1 of the present invention. FIG. 7A (a) is a view of the state where the heat exchanger fixing plate is attached to the left side surface portion of the heat exchanger, as viewed from the right side surface side in a state where the heat exchanger is cut near the center. FIG. 7A (b) is a perspective view of FIG. 7A (a) viewed from the right side surface side of the heat exchanger. FIG. 7A (c) is a perspective view of FIG. 7A (a) viewed from the left side surface side of the heat exchanger.

  In the heat exchanger 10 of FIG. 7A, the back heat exchanger 21 is disposed, and as the auxiliary heat exchanger 30, an outer auxiliary heat exchanger 30 </ b> A is disposed on the outer upper portion of the main heat exchanger 20. An outer auxiliary heat exchanger 30 </ b> B is disposed at the outer lower portion of 20. Further, an outer auxiliary heat exchanger 30 </ b> C is disposed on the outer upper portion of the rear heat exchanger 21.

  FIG. 7B is an explanatory diagram of another attachment pattern of the auxiliary heat exchanger of the indoor unit of the air conditioner using the heat exchanger fixing plate according to Embodiment 1 of the present invention. FIG. 7B (a) is a view of a state in which the heat exchanger fixing plate is attached to the left side surface portion of the heat exchanger, as viewed from the right side surface side in a state where the heat exchanger is cut near the center. FIG. 7B (b) is a perspective view of FIG. 7B (a) viewed from the right side surface side of the heat exchanger. FIG. 7B (c) is a perspective view of FIG. 7B (a) viewed from the left side surface side of the heat exchanger.

  In the heat exchanger 10 of FIG. 7B, in addition to the back surface heat exchanger 21 and the outer auxiliary heat exchangers 30A to 30C shown in FIG. 7A, an inner auxiliary heat exchanger 31A is further arranged on the inner upper portion of the main heat exchanger 20. The inner auxiliary heat exchanger 31 </ b> B is disposed at the inner lower portion of the main heat exchanger 20.

  In addition, the attachment pattern of the auxiliary heat exchanger 30 can be configured in several types depending on the presence / absence of the outer auxiliary heat exchangers 30A to 30C and the inner auxiliary heat exchangers 31A and 31B, in addition to the patterns shown in the above figures.

  In this example, the heat exchanger 10 having the attachment pattern of several types of auxiliary heat exchangers 30 is fixed to the rear housing 1 by fixing the left side surface thereof to the heat exchanger fixing plate 40 in this example. The right side surface portion of the container 10 is fixed to the rear housing 1 by screwing or the like. Although the detail of the fixing method of the heat exchanger 10 and the heat exchanger fixing plate 40 is mentioned later, the back surface side (opposite surface side with respect to a heat exchanger) of the plate-shaped base part 40a (refer FIG. 4) of the heat exchanger fixing plate 40 ) To the hairpin portion 10ba (see FIG. 6) of the heat exchanger 10, and the hairpin portion 10ba is locked by a locking structure described later.

  FIG. 8 is a view showing the heat exchanger fixing plate according to Embodiment 1 of the present invention. FIG. 8 (a) is a view of the heat exchanger fixing plate seen from the back side, and FIG. It is the figure which looked at the exchanger fixing plate from the surface side. FIG. 9 is a perspective view of the heat exchanger fixing plate according to Embodiment 1 of the present invention as viewed from the back side. FIG. 10 is a perspective view of a state where a heat exchanger fixing plate is attached to the hairpin portion of the heat exchanger of FIG. 7B.

  The heat exchanger fixing plate 40 is made of resin, and the insertion holes 41 </ b> A to 41 </ b> A into which the hairpin portions 20 </ b> A to 20 </ b> L of the main heat exchanger 20 are inserted into the plate-like base portion 40 a whose back surface faces the side surface portion of the heat exchanger 10. 41L and insertion holes 42A to 42F into which the hairpin portions 21A to 21F of the rear heat exchanger 21 are inserted are formed. The plate-like base portion 40a of the heat exchanger fixing plate 40 further includes insertion holes 43A to 43C into which the hairpin portions 22A to 22C of the outer auxiliary heat exchanger 30A are inserted, and hairpin portions 23A to 23C of the outer auxiliary heat exchanger 30B. Insertion holes 44A to 44C and insertion holes 45A and 45B into which the hairpin portions 24A and 24B of the outer auxiliary heat exchanger 30C are inserted are formed.

  Further, on the surface side of the plate-like base portion 40a, one corresponding to each of at least some of the insertion holes 41A to 41L, 42A to 42F, 43A to 43C, 44A to 44C, 45A, 45B. Alternatively, two locking pieces 50 are erected. The structure of the locking piece 50 will be described in detail again.

  When the heat exchanger 10 does not include the outer auxiliary heat exchangers 30A to 30C, the heat exchange corresponding to the hairpin portions 22A to 22C, 23A to 23C, 24A, and 24B of the outer auxiliary heat exchangers 30A to 30C Since the hairpin portions 22A to 22C, 23A to 23C, 24A, and 24B are not inserted into the insertion holes 43A to 43C, 44A to 44C, 45A, and 45B of the device fixing plate 40, they are opened.

  Since the insertion holes 43A to 43C, 44A to 44C, 45A, and 45B are upstream of the main heat exchanger 20 and the rear heat exchanger 21, air can enter and exit from the insertion holes 43A to 43C, 44A to 44C, 45A, and 45B. Even if it exists, the air passes through the main heat exchanger 20 and the back heat exchanger 21. For this reason, the air cooled by the main heat exchanger 20 and the back heat exchanger 21 flows into the air passage inner side 11. For this reason, even if the hairpin portion is opened without being inserted into the insertion holes 43A to 43C, 44A to 44C, 45A, and 45B of the heat exchanger fixing plate 40, there is no temperature difference in the air flowing from there, and the indoor unit There is no impact on performance.

  On the other hand, a countermeasure against condensation is necessary on the air passage inner side 11 of the heat exchanger fixing plate 40, and this point will be described below.

  FIG. 11 is an explanatory diagram of dew flow inside the air passage of the heat exchanger fixing plate according to Embodiment 1 of the present invention. Arrows 70A and 70B in FIG. 11 indicate dew collection paths inside the air path of the heat exchanger fixing plate.

The first embodiment is characterized by the structure of the air passage inner side 11 of the heat exchanger fixing plate 40. Hereinafter, the structure of the inner side 11 of the heat exchanger fixing plate 40 will be described with reference to FIGS. 9 to 11.
A first dew receiving rib that receives dew from the heat exchanger (the main heat exchanger 20, the rear heat exchanger 21, and the outer auxiliary heat exchangers 30A to 30C) on the outer side of the air passage 12 is provided on the rear surface side of the plate-like base portion 40a. 60 stands upright. The first dew receiving rib 60 is formed to extend along the air passage inner / outer boundary line 13 between the air passage inner side 11 and the air passage outer side 12 along the air passage inner / outer boundary line 13 (main heat exchanger 20). And is formed so as to extend along the side surface shape of the rear heat exchanger 21). A second dew receiving rib 61 is erected along the shape of the first dew receiving rib 60 with a space inside the first dew receiving rib 60. The first dew receiving rib 60, the second dew receiving rib 61, and the plate-like base 40a form a groove 63 into which the hairpin portions of the inner auxiliary heat exchangers 31A and 31B are inserted.

  A hole is not provided in the plate-like base portion 40a forming the groove 63, that is, the insertion direction end of the hairpin portion is closed in the groove 63. Therefore, even if the heat exchanger fixing plate 40 is used in an attachment pattern that does not use the inner auxiliary heat exchangers 31A and 31B, air that does not pass through the heat exchanger 10 does not enter the air path. Therefore, it is possible to suppress condensation due to a temperature difference between the air that has passed through the heat exchanger 10 and the air that has not passed through the heat exchanger 10 in the air passage.

  And in the groove | channel 63, support part 63A-63E which supports each of the three hairpin part of 31 A of inner side auxiliary heat exchangers, and the two hairpin part of the inner side auxiliary heat exchanger 31B is formed. The support parts 63A to 63E have a backlash suppression rib 63a and support the backlash of each hairpin part in a suppressed state.

  Even if the insertion direction end of the hairpin portion is closed in the groove 63, condensation still occurs, and depending on the mounting pattern, the hairpin portions of the inner auxiliary heat exchangers 31A and 31B are located. Is required. Therefore, although the support portions 63A to 63E are formed in the groove 63 as described above, the inside of the groove 63 is not completely partitioned by the support portions 63A to 63E, and the dew in the groove 63 is removed. A dew recovery path indicated by an arrow 70A in FIG. 11 is secured in the groove 63 so that the liquid can be discharged toward the drain pan 8 (see FIG. 2).

  Further, a third dew receiving rib 62 is erected on the inner side of the second dew receiving rib 61 with a space therebetween, and the second dew receiving rib 61, the third dew receiving rib 62, and the plate-like base portion 40a. Thus, a groove 64 is formed. A dew recovery path shown by an arrow 70B in FIG. 11 is secured in the groove 64 so that the dew in the groove 64 can be discharged toward the drain pan 8 (see FIG. 2).

  Next, a fixing structure of the main heat exchanger 20, the back heat exchanger 21, and the heat exchanger fixing plate 40 of the heat exchanger 10 will be described.

FIG. 12 is a perspective view of FIG. 9 cut along AA. 13 is a cross-sectional view taken along line AA in FIG.
On the surface side of the plate-like base 40a, as described above, the locking pieces 50 are erected corresponding to the insertion holes 41A to 41L, 42A to 42F, 43A to 43C, 44A to 44C, 45A, and 45B. ing. The locking piece 50 is used to lock the hairpin part, but also serves as a dew receiving when dew generated around the heat exchanger fixing plate 40 on the outside 12 of the air passage flows along the heat transfer tube 10b. ing. FIG. 12 shows an example in which one or two locking pieces 50 are provided for one insertion hole, or no locking piece 50 is provided. In the following, for convenience of explanation, among the plurality of locking pieces 50, the locking pieces 50 shown in the cut surface portion of FIG. 12 are distinguished as locking pieces 50A, 50B, and 50C, and these are locked as representatives. The hairpin locking structure by the piece 50 will be described. Each locking piece 50 has the same structure, and the behavior when locking the hairpin portion is the same.

Hereinafter, the locking structure of the hairpin part in the insertion hole 41K will be described.
A wall 40d (see FIG. 10) is erected on the back surface of the plate-like base 40a, and a locking piece 50A is formed in a cantilever shape on the wall 40d. The insertion hole 41K is formed in a long hole shape, and the locking piece 50A is formed along a part of the inner peripheral shape of the insertion hole 41K. Specifically, the locking piece 50A extends along the inner peripheral shape of the insertion hole 41K from one end to the other end of the elongated hole-shaped insertion hole 41K and extends to the vicinity of the center in the longitudinal direction of the insertion hole 41K. It is formed as follows. And the hook part 52 which protruded toward the inner side of the insertion hole 41K is formed in the heat exchanger 10 side (upper side of FIG. 13) of the front-end | tip part of the base 51 of locking piece 50A, On the end surface on the heat exchanger 10 side, an inclined surface 52a is formed which inclines toward the insertion direction of the hairpin portion 20K (the white arrow in FIG. 13) toward the inside of the insertion hole 41K. And the end surface on the opposite side to the inclined surface 52a of the hook part 52 has the flat surface 52b (refer FIG. 13) orthogonal to an insertion direction. Further, as shown in FIGS. 11 to 13, a locking piece 50 </ b> B having the same configuration as the locking piece 50 </ b> A is provided on the other of the curved portions at both ends of the insertion hole 41 </ b> K so that the hook portions 52 face each other. Yes.

  When the hairpin portion 20K of the main heat exchanger 20 is inserted into the insertion hole 41K in the direction of the white arrow in FIG. 13, the hairpin portion 20K is placed on the inclined surface 52a of the hook portion 52 of each of the locking pieces 50A and 50B. And guided toward the back side in the insertion direction (the lower side in FIG. 13). Since the locking pieces 50A and 50B are cantilevered and have flexibility, when the hairpin portion 20K is inserted, the locking pieces 50A and 50B bend in directions away from each other due to the insertion force. And when the hairpin part 20K gets over the hook part 52, the shape of locking piece 50A, 50B will return to the original, and will be in the state which held the hairpin part 20K from both sides. That is, the flat surface 52b of the hook portion 52 of the locking pieces 50A and 50B plays a role of “returning” the fishhook, and is locked so that the hairpin portion 20K is not pulled out.

  Further, when a force is applied in a direction in which the hairpin portion 20K is pulled out from the insertion hole 41K, first, the hook portions 52 of the locking pieces 50A and 50B are first moved in a direction (perpendicular to the white arrow). Move (beside on the flat surface 52b). Note that a part of the end surface of the hook portion 52 on the heat exchanger 10 side (specifically, the portion of the end surface on the heat exchanger 10 side of the hook portion 52 excluding the inclined surface 52a) 52c is in the plate-like base portion 40a. It is formed flush with the surface 40e of the formation surface of the insertion hole 41K. For this reason, when the hairpin portion 20K comes out of the insertion hole 41K, if the hook portions 52 of the locking pieces 50A and 50B move sideways in a direction away from each other, a part 52c of the hook portion 52 hits the surface 40e. Thereby, bending of the locking pieces 50A and 50B in the direction opposite to the white arrow is suppressed, and the locking pieces 50A and 50B can be prevented from being broken.

  Further, when the operation of pulling out the hairpin portion 20K from the insertion hole 41K is rapid, etc., the hook portions 52 of the locking pieces 50A and 50B are moved in FIG. 13 as the hairpin portion 20K moves in the direction opposite to the white arrow. The locking pieces 50A and 50B bend using the connection portion with the plate-like base 40a as a fulcrum so that it can be pulled upward. In this case, the surface 52d of the hook portion 52 opposite to the inclined surface 52a (opposite to the left-right direction in FIG. 13) hits the inner peripheral surface 40b of the insertion hole 41K, and the deflection in the direction perpendicular to the white arrow is suppressed. The portion 20K is caught on the flat surface 52b and cannot be removed from the insertion hole 41K unless the locking pieces 50A and 50B are broken.

  In addition, although two locking pieces are provided in the insertion hole 41K, it is not always necessary to provide two locking pieces in every insertion hole as described above. For example, in the insertion hole 44B, one locking piece is provided. A piece 50C is provided. Also in the locking piece 50C, the hairpin portion 23B can be locked by the hook portion 52 so as not to come off. Further, there may be a portion where the locking piece 50 is not provided, such as the insertion hole 41E. In the illustrated example, the insertion holes 41 </ b> A to 41 </ b> F and 42 </ b> A to 42 </ b> C corresponding to the inner rows of the main heat exchanger 20 and the rear heat exchanger 21 are not provided with the locking pieces 50 and correspond to the outer rows. The main heat exchanger 20 and the rear heat exchanger 21 are locked and fixed to the heat exchanger fixing plate 40 by the locking pieces 50 provided in the insertion holes 41G to 41L and 42D to 42F.

  As described above, the main heat exchanger 20, the back heat exchanger 21, and the auxiliary heat exchanger 30 on the outside 12 of the air passage are locked and fixed to the heat exchanger fixing plate 40 by the locking pieces 50. The inner auxiliary heat exchangers 31 </ b> A and 31 </ b> B on the air passage inner side 11 are supported in a state in which the backlash is suppressed by the support portions 63 </ b> A to 63 </ b> E in the groove 63 as described above.

  When a force is applied in a direction in which the heat exchanger fixing plate 40 is removed from the heat exchanger 10, the hook piece 52 at the tip of the locking piece 50 moves in a direction perpendicular to the white arrow in FIG. However, the surface 40e of the formation surface of the insertion hole 41K in the plate-like base portion 40a is positioned at the tip of the bending, and a part 52c of the hook portion 52 comes into contact with the surface 40e. For this reason, the bending of the locking piece 50 in the direction opposite to the direction in which the heat exchanger is inserted (the direction of the white arrow in FIG. 13) is suppressed. Therefore, it is difficult to remove the heat transfer tube 10b once inserted.

  By screwing into the back housing 1 through a screw (not shown) in the through hole 40c (see FIG. 10) of the heat exchanger fixing plate 40 in which the hairpin portion of the heat exchanger 10 is inserted as described above, The heat exchanger 10 is fixed to the rear housing 1 by the heat exchanger fixing plate 40.

  Moreover, when removing the heat exchanger fixing plate 40 from the heat exchanger 10, in the locking pieces 50A and 50B, the distance between the hook portions 52 may be increased to be equal to or larger than the tube diameter of the heat transfer tube 10b. Further, also in the locking piece 50C, the heat exchanger fixing plate 40 can be removed by bending the locking piece 50C in a direction in which the hook portion 52 is separated from the heat transfer tube 10b.

  As described above, in the first embodiment, the groove 63 into which the hairpin portion of the inner auxiliary heat exchangers 31A and 31B is inserted and the groove 63 with the insertion direction end portion closed is replaced by the heat exchanger fixing plate 40. And a dew collection path was secured in the groove 63. Thereby, it can be used in common with the specification which does not provide inner auxiliary heat exchanger 31A, 31B inside the main heat exchanger 20 and the back surface heat exchanger 21, and the inner auxiliary heat exchanger 31A. The heat exchanger fixing plate 40 capable of draining dew generated at the insertion portion of the hairpin portion of 31B can be obtained. Therefore, it is not necessary to design a plurality of heat exchanger fixing plates according to the mounting pattern.

  By the way, conventionally, a structure in which a hairpin part is locked to an engagement claw protruding on a cylindrical wall surface surrounding an insertion hole provided in a heat exchanger fixing plate, and the heat exchanger is attached to the heat exchanger fixing plate. There is. In this structure, since the wall surface is cylindrical, it is difficult to bend. Therefore, a large force is required when attaching and removing the heat exchanger fixing plate, and it is difficult to work. On the other hand, in the first embodiment, the hairpin portion is locked by the cantilever-shaped locking piece 50 that is bent in a direction orthogonal to the insertion direction of the hairpin portion. The operation range of the part 52 is wide, the detachability is improved, the work can be performed with a smaller force than before, and the assemblability can be improved.

  In addition, although the heat exchanger 10 of this Embodiment 1 showed the structure of 3 rows in the air path outer side 12, and 1 row in the air path inner side 11, as long as space permits, it is also possible to increase the number of rows. .

  In the above description, the inner auxiliary heat exchangers 31 </ b> A and 31 </ b> B are attached to the heat exchanger fixing plate 40 by being supported by the support portions 63 </ b> A to 63 </ b> E by the backlash suppressing rib 63 a provided in the groove 63. The inner auxiliary heat exchangers 31A and 31B may be attached to the heat exchanger fixing plate 40 as follows. That is, the inner auxiliary heat exchangers 31A and 31B are sandwiched between the heat exchanger fixing plates 40, the inner auxiliary heat exchangers 31A and 31B are fixed to the heat exchanger fixing plates 40 with screws, The main heat exchanger 20 and the rear heat exchanger 21 may be connected as separate parts. The backlash of the inner auxiliary heat exchangers 31A and 31B on the air path inner side 11 at that time can be suppressed by the backlash suppressing rib 63a (see FIG. 9).

  In the above description, the left side surface of the heat exchanger 10 is fixed by the heat exchanger fixing plate 40 and the right side surface is fixed to the rear housing 1 by screwing or the like. The left side surface may be fixed to the rear housing 1 by screwing or the like, and the right side surface may be fixed by the heat exchanger fixing plate 40. In the above description, the heat exchanger fixing plate 40 is attached only to one side surface portion of the heat exchanger 10, but may be attached to the other side surface portion. If the heat exchanger fixing plate 40 is attached to at least one side surface portion, the present invention is applied.

  DESCRIPTION OF SYMBOLS 1 Rear housing | casing, 2 Front housing | casing, 3 Housing | casing, 3A suction inlet, 3B blower outlet, 4 Design panel, 5 Wind improvement bottom change board, 6 Blower, 7 Filter, 8 Drain pan, 10 Heat exchanger, 10a Radiation fin, 10b Heat transfer tube, 10ba Hairpin part, 11 Inside airway, 12 Outside airway, 13 Inside / outside border line, 20 Main heat exchanger, 20A-20L Hairpin part, 20a End face, 21 Back heat exchanger, 21a End face, 21A -21F Hairpin part, 22A-22C Hairpin part, 23A-23C Hairpin part, 24A, 24B Hairpin part, 30 Auxiliary heat exchanger, 30A-30C Outer auxiliary heat exchanger, 31A, 31B Inner auxiliary heat exchanger, 40 Heat exchange Instrument fixing plate, 40a plate-like base, 40b inner peripheral surface, 40c through hole, 40d wall, 40e formation of insertion hole in plate-like base Surface of the surface, 41A-41L insertion hole, 42A-42F insertion hole, 43A-43C insertion hole, 44A-44C insertion hole, 45A, 45B insertion hole, 50 locking piece, 50A-50C locking piece, 51 base, 52 Hook part, 52a inclined surface, 52b flat surface, 52c part of the end face of the hook part on the heat exchanger side, 52d surface opposite to the inclined surface in the hook part, 60 first dew receiving rib, 61 second dew receiving rib , 62 Third dew receiving rib, 63 groove, 63A to 63E support part, 63a rattle suppression rib, 64 groove, 70A, 70B Dew collection path.

Claims (8)

A heat exchanger fixing plate for fixing a side surface portion of a heat exchanger having a radiation fin and a heat transfer tube to a casing of an air conditioner,
A plate-like base whose back surface faces the side surface of the heat exchanger;
An insertion hole formed in the plate-like base, into which a hairpin part of a heat transfer tube of the main heat exchanger of the heat exchanger is inserted,
Each of the inner auxiliary heat exchangers formed on the back surface of the plate-like base portion so as to extend along the side surface shape of the main heat exchanger, and disposed inside the air passage that is downstream of the air passing through the heat exchanger. A groove into which the hairpin portion is inserted,
The groove is closed at the insertion direction end of the hairpin part, and a dew collection path is formed by the groove. Each support part that supports each hairpin part of the inner auxiliary heat exchanger is formed in the groove, and each support part includes a backlash suppressing rib that suppresses backlash of each hairpin part. The heat exchanger fixing plate according to claim 1. A first dew receiving rib erected between the main heat exchanger and the inner auxiliary heat exchanger on the back surface of the plate-like base; a second dew receiving rib erected further inside; The heat exchanger fixing plate according to claim 1 or 2, wherein the groove is formed by a plate-like base portion. The wall portion erected on the surface of the plate-like base portion is provided with a cantilever-like locking piece that is flexible and is formed along a part of the inner peripheral shape of the insertion hole. A hook portion protruding toward the inside of the insertion hole is provided on the heat exchanger side of the distal end portion of the locking piece,
When the hairpin part is inserted into the insertion hole, the locking piece bends with the force of the insertion, and when the hairpin part gets over the hook part, the shape of the locking piece returns. The heat exchanger fixing plate according to any one of claims 1 to 3, wherein the hook portion is configured to be locked to the hairpin portion. A part of the end surface of the hook portion on the heat exchanger side is the plate-like base portion so that the amount of bending is regulated by abutting against the inner peripheral surface of the insertion hole when the locking piece is bent. The heat exchanger fixing plate according to claim 4, wherein the heat exchanger fixing plate is flush with a surface of the insertion hole forming surface. An inclined surface that is inclined toward the insertion direction of the hairpin portion of the heat exchanger is provided on an end surface of the hook portion of the locking piece on the heat exchanger side toward the inner side of the insertion hole. The heat exchanger fixing plate according to claim 4 or 5, characterized by the above. The end surface of the hook portion on the opposite side of the heat exchanger side of the locking piece has a flat surface orthogonal to the insertion direction, and the hairpin portion is inserted into the insertion hole so as to get over the hook portion. The heat exchanger fixing plate according to claim 6, wherein the hairpin portion of the heat exchanger is locked to the flat surface.   An air conditioner using the heat exchanger fixing plate according to any one of claims 1 to 7.

Images