JP2012072918A - Indoor unit of air conditioner, and air conditioner equipped with the indoor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit including a heat exchanger using a heat transfer tube in a flat tubular form, in which deposition of dew caused by mixing of air subjected to heat exchange by fins of the heat exchanger with air not subjected to heat exchange in an air passage can be prevented and assembling property of the heat exchanger is improved.SOLUTION: The heat exchanger 20 of the indoor unit 100 includes fins 26 and flat tubular heat transfer tubes 27 disposed penetrating the fins 26. At least one end of each heat transfer tube 27 is provided with: a pipe joint 28 which has a cylindrical form at an end in the opposite side to the heat transfer tube 27 and is fixed to a fixing member 30; and a blocking member 40 blocking an air passage between the fins 26 and the fixing member 30 is disposed downwind with respect to the pipe joints 28. The blocking member 40 includes a locking member 49 that is locked to end of the heat exchanger 20 to mount the blocking member 40 on the heat exchanger 20. The locking member 49 covers end portions of the pipe joints 28, flat tubes 27 and fins 26 in a range opposing to the locking member 49.

Description

  The present invention relates to an indoor unit including a heat exchanger using a plurality of flat tubular heat transfer tubes, and an air conditioner including the indoor unit.

  A heat exchanger using a flat tube having a flat cross section as a heat transfer tube has higher heat exchange efficiency and lower ventilation resistance than a heat exchanger using a circular tube as a heat transfer tube. For this reason, the heat exchanger using a flat tubular heat transfer tube can exhibit the same capability as a heat exchanger using a circular tubular heat transfer tube with smaller power consumption. As a heat exchanger using such a flat tubular heat transfer tube, for example, “a large number of plate-like fins arranged in parallel, between which gas flows, and inserted into each plate-like fin at right angles, the inside is a working refrigerant. The heat exchanger is composed of a plurality of heat transfer tubes arranged in a row direction perpendicular to the gas passage direction and provided in one or more rows in the row direction which is the gas passage direction. A heat exchanger tube 15 of the heat exchanger 11 on the side of the working refrigerant having a lower refrigerant quality, of the two heat exchangers 11 and 21, is a flat tube, and has a higher refrigerant quality. The heat transfer tube 23 of the side heat exchanger 21 is a circular tube "(for example, see Patent Document 1).

JP 2008-261517 A (Summary, FIG. 1)

When accommodating a heat exchanger in the housing | casing of an indoor unit, a heat exchanger may be attached to a housing | casing through the fixing member provided in the both ends of the heat exchanger. At this time, the air flowing between the two fixing members exchanges heat with the refrigerant flowing in the heat exchanger. That is, an air passage is formed between the two fixing members.
Further, at least one end of the heat transfer tube of the heat exchanger is complicatedly piped to join and branch the refrigerant flow path. At this time, since a complicated pipe configuration is difficult for a flat tube, in a heat exchanger using a flat tubular heat transfer tube, at least one end of the flat tubular heat transfer tube, the shape (flat tube shape) is a pipe joint. The part which transfers to a circular pipe shape by the etc. is needed. Thereby, since the heat exchanger using a flat tubular heat transfer tube cannot provide a fin in the pipe joint which changes this shape, a big gap will arise between a fin and a fixed member.

  For this reason, during the cooling operation in which the heat exchanger functions as an evaporator, the air that has passed between the fixing member and the fins enters the air path of the indoor unit. That is, the air that has passed between the fixing member and the fin (air that has not been heat exchanged by the fin) is mixed with the air that has passed between the fin (air that has been heat exchanged by the fin) in the air path of the indoor unit. It becomes. Therefore, there has been a problem that these air are mixed in the air path of the indoor unit and dewed on the air path of the indoor unit and the like, causing dew jumping.

  Moreover, in order to support the weight of the whole heat exchanger, the conventional air conditioner uses the fixing member as a strong metal part. For this reason, when the heat exchanger is assembled to the housing, the edge portion of the fixing member is caught by the housing, and there is a problem that it is difficult to assemble the heat exchanger to the housing. Moreover, the conventional air conditioner also has a problem that when the heat exchanger is assembled to the casing, the heat transfer tubes and fins of the heat exchanger come into contact with the casing and these are deformed. That is, the conventional air conditioner also has a problem that the heat exchanger is not easily assembled.

  The present invention has been made to solve the above-described problems, and in an indoor unit including a heat exchanger using a flat tubular heat transfer tube and an air conditioner including the indoor unit, heat exchange is performed. It is possible to prevent dew condensation caused by mixing the air exchanged with the fins of the heat exchanger and the air not heat exchanged with the fins of the heat exchanger in the air path of the indoor unit. An object of the present invention is to provide an air conditioner indoor unit with improved assemblability and an air conditioner equipped with the indoor unit.

  An indoor unit of an air conditioner according to the present invention includes a housing in which an air outlet and a suction port are formed, and a heat exchanger accommodated in the housing, and the heat exchanger is provided at both ends of the heat exchanger. It is an indoor unit of an air conditioner that is attached to a housing via a fixed member and an air passage is formed between the fixed members, and the heat exchanger is a plurality of units arranged via a predetermined gap. The first fin and a plurality of flat tubes provided through the first fin, and at least one end of the flat tube has a circular tube-shaped end opposite to the flat tube side. And a pipe joint fixed to the fixing member is provided, and on the leeward side of the pipe joint, a first closing member for closing the air passage between the first fin and the fixing member is provided. The member is locked to the end of the heat exchanger in a side view, and the number of locking members for attaching the first closing member to the heat exchanger is small. And the locking member is locked to a pipe joint or a flat tube disposed between the first fin and the fixing member, and the pipe joint, the flat tube, and the first tube in a range facing the locking member. It covers the end of one fin.

  Moreover, the air conditioner which concerns on this invention is provided with the indoor unit of this air conditioner.

In the present invention, a first closing member for closing the air passage between the first fin and the fixing member is provided. For this reason, the air passing between the first fin, which is the region where the first fin is not provided, and the fixing member (that is, the air not heat-exchanged by the first fin of the heat exchanger) is the heat exchanger. It is possible to prevent the air exchanged with the first fin from being mixed with the air path of the indoor unit and to prevent the air from being dewed on the air path of the indoor unit during the cooling operation.
In the present invention, the locking member of the closing member covers the pipe joint, the flat tube, and the first fin located at the end of the heat exchanger. For this reason, when the heat exchanger is assembled to the housing, the pipe joint, the flat tube and the first fin located at the end of the heat exchanger can be prevented from coming into contact with the housing, and these can be prevented from being deformed. Since it can do, the assembly | attachment property of a heat exchanger can be improved.

1 is an exploded perspective view of an indoor unit according to Embodiment 1 of the present invention. It is a principal part enlarged view (perspective view) which shows the attachment state of the heat exchanger which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional schematic diagram of the indoor unit which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the heat exchanger which concerns on Embodiment 1 of this invention. It is a perspective view which shows the edge part vicinity of the heat exchanger which concerns on Embodiment 1 of this invention. It is a perspective view which shows the edge part vicinity of the heat exchanger which concerns on Embodiment 1 of this invention. It is a perspective view which shows the edge part vicinity of the heat exchanger which concerns on Embodiment 1 of this invention. It is a front view which shows the edge part vicinity of the heat exchanger which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the blocking member provided in the edge part vicinity of the heat exchanger which concerns on Embodiment 1 of this invention. It is a principal part enlarged view which shows the state by which the closing member was provided in the edge part vicinity of the heat exchanger which concerns on this Embodiment 1. FIG. It is a side view which shows an example of the fixing method of the closing member and fixing member which concern on Embodiment 1 of this invention. It is a side view which shows the attachment method of the blocking member which concerns on Embodiment 1 of this invention. It is a perspective view which shows the attachment method of the blocking member which concerns on Embodiment 1 of this invention. It is a principal part enlarged view (perspective view which shows the edge part vicinity of a heat exchanger) which shows the attachment state of the blocking member which concerns on Embodiment 1 of this invention. It is a principal part enlarged view (perspective view) which shows the locking member 48 vicinity of the closing member which concerns on Embodiment 1 of this invention. It is a principal part enlarged view (perspective view) which shows the locking member 49 vicinity of the closing member which concerns on Embodiment 1 of this invention. It is an exploded side view which shows the assembly method of the heat exchanger which concerns on Embodiment 1 of this invention. It is an exploded side view which shows the assembly method of the heat exchanger which concerns on Embodiment 1 of this invention. It is a principal part enlarged view which shows another example of the heat exchanger which concerns on Embodiment 1 of this invention. It is a principal part enlarged view which shows the heat exchanger and closing member which concern on Embodiment 2 of this invention. It is AA sectional drawing of FIG. It is a principal part enlarged view which shows the heat exchanger and closing member which concern on Embodiment 3 of this invention. It is BB sectional drawing of FIG. It is a principal part enlarged view which shows the heat exchanger and closing member which concern on Embodiment 4 of this invention. It is explanatory drawing which shows the 2nd blocking member which concerns on Embodiment 4 of this invention.

  Hereinafter, the indoor unit of the air conditioner which concerns on this invention, and the detail of the air conditioner provided with this indoor unit are demonstrated. Here, in each of the following embodiments, the present invention will be described by taking a wall-mounted indoor unit connected to an outdoor unit through a refrigerant pipe as an example. In the drawings for explaining the following embodiments, the size and shape of each component may be different from the actual ones. The present invention is not limited to a wall-mounted indoor unit, but can be implemented in various indoor units such as a ceiling-embedded indoor unit and a floor-standing indoor unit.

Embodiment 1 FIG.
FIG. 1 is an exploded perspective view of the indoor unit according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view (perspective view) of a main part showing a mounting state of the heat exchanger in the indoor unit. FIG. 3 is a schematic vertical sectional view of the indoor unit.

  The indoor unit 100 is installed on an indoor wall surface or the like, and includes a housing 1, a blower 10, a heat exchanger 20, and the like.

  The housing 1 includes a box 2, a front frame 3, a front opening / closing panel 4, a nozzle 5, and the like. The box 2 forms the rear surface of the housing 1. The box 2 is provided with a holding plate 2 a that holds the blower 10, the heat exchanger 20, and the like housed in the housing 1. The box 2 is also provided with a rib 2b that projects downward from the heat exchanger 20. The condensed water dropped on the heat exchanger 20 is collected by the rib 2b. The front frame 3 constitutes the outer shape of the housing, and has openings on the upper surface, the front surface, and the lower surface. The upper surface side opening of the front frame 3 serves as the suction port 1a, and the lower surface side opening of the front frame 3 serves as the air outlet 1b. The front opening / closing panel 4 serves as a design portion of the front portion of the housing 1 and is provided in the front side opening of the front frame 3. The nozzle 5 collects the dew condensation water that adheres to the heat exchanger 20 and drops, and is disposed behind the front frame 3 and below the heat exchanger 20. That is, the dew collection mechanism of the indoor unit 100 is configured by the rib 2 b and the nozzle 5 of the box 2. The nozzle 5 is also an upper wall surface of the outlet 1b.

  The blower outlet 1b of the housing 1 is provided with a wind direction adjusting mechanism 6 composed of a vertical vane 6a, a horizontal vane (not shown), and the like. Further, a filter 7 is provided at the suction port 1a of the housing 1 (more specifically, between the suction port 1a and the heat exchanger 20) in order to remove dust and the like from the air flowing into the housing 1. ing. Further, the housing 1 accommodates the blower 10 having a plurality of blades 11 held by the holding plate 2a of the box 2 as described above. The housing 1 also houses an electrical component box 8 provided with a control board and the like for controlling the blower 10 and the wind direction adjusting mechanism 6.

  As described above, the housing 1 also holds the heat exchanger 20 held by the holding plate 2a of the box 2. More specifically, fixing members 30 are provided at both ends of the heat exchanger 20, and the heat exchanger 20 is accommodated in the housing 1 by fixing these fixing members 30 to the holding plate 2 a. In a state where the heat exchanger 20 is accommodated in the housing 1, the heat exchanger 20 is provided so as to cover the top of the blower 10 through a predetermined gap. In the state in which the heat exchanger 20 is accommodated in the housing 1, the fixing member 30 of the heat exchanger 20 and the holding plate 2 a of the box 2 make the outside of the fixing member 30 and the inside of the fixing member 30 (both fixing members). 30) is isolated. The detailed structure of the heat exchanger 20 will be described later.

  That is, the air path of the indoor unit 100 is a path that passes between the suction port 1a and the fixing members 30 of the heat exchanger 20 and the blower 10 and the outlet 1b in this order. In other words, the air sucked from the suction port 1a by the activation of the blower 10 flows between the two fixing members 30 of the heat exchanger 20 after dust or the like is removed by the filter 7. At this time, the air exchanges heat with the refrigerant flowing through the heat transfer tubes (the heat transfer tubes 23 and 27 described later) of the heat exchanger 20 via the fins (the fins 22 and 26 described later) of the heat exchanger 20. To do. The heat-exchanged air is blown out from the outlet 1b after passing through the blower 10. In addition, at the time of air_conditionaing | cooling operation, when air is cooled with the heat exchanger 20, dew condensation water adheres to a heat exchanger. When the condensed water is dropped, the condensed water is collected by a dew collecting mechanism and then discharged outside the room.

(Detailed structure of heat exchanger)
Then, the detailed structure of the heat exchanger 20 is demonstrated. The heat exchanger 20 according to the first embodiment includes a heat exchanger 20a that covers the front of the blower 10, a heat exchanger 20b that covers the upper front side of the blower 10, and a heat exchanger 20c that covers the upper rear side of the blower 10. It is configured. These heat exchangers 20a to 20c have the same configuration, and include a heat exchanger 21 using a circular heat transfer tube 23 and a heat exchanger 25 using a flat tubular heat transfer tube 27. In addition, in the following description, when it is not necessary to distinguish and explain the heat exchangers 20a to 20c, the alphabet symbols (a to c) may be omitted.

  The heat exchanger 21 includes a plurality of fins 22 arranged via a predetermined gap, and a plurality of heat transfer tubes 23 (circular tubular heat transfer tubes) passing through the fins 22. Here, the fin 22 corresponds to the second fin of the present invention.

  The heat exchanger 25 includes a plurality of fins 26 arranged with a predetermined gap, and a plurality of heat transfer tubes 27 (flat tubular heat transfer tubes) penetrating the fins 26. These heat transfer tubes 27 are divided into a plurality of refrigerant flow paths by partition walls, thereby increasing the heat exchange area between the refrigerant flowing in the heat transfer tubes 27 and the heat transfer tubes 27. The partition provided inside the heat transfer tube 27 also contributes to the improvement of the pressure resistance of the heat transfer tube 27. In the first embodiment, the heat transfer tubes 27 are arranged in two rows along the ventilation direction, and the first row of heat transfer tubes 27 and the second row of heat transfer tubes 27 are arranged in a staggered manner. Moreover, each heat exchanger tube 27 is arrange | positioned so that the longitudinal direction of a flat shape may follow a ventilation direction. Here, the fin 26 corresponds to the first fin of the present invention.

  The heat exchanger 25 in which the flat tubular heat transfer tube 27 is arranged in this way has reduced ventilation resistance and can keep the power of the blower 10 small compared to a heat exchanger using a circular tubular heat transfer tube. . For this reason, the power consumption of the air blower 10 can be reduced. Further, the heat exchanger 25 in which the flat tubular heat transfer tubes 27 are arranged in this way has a number of stages corresponding to the reduction of the ventilation resistance by reducing the thickness of the heat transfer tubes compared to the heat exchanger using the circular tubular heat transfer tubes. (The number of heat transfer tubes arranged in a direction perpendicular to the ventilation direction) can be increased, and the effect of improving the heat exchange efficiency can be obtained.

  In addition, each of the heat exchangers 20a to 20c according to the first embodiment has the heat exchanger 21 using the tubular heat transfer tube 23 arranged on the windward side, and performs heat exchange using the flat tubular heat transfer tube 27. The vessel 25 is arranged on the leeward side. By arranging the heat exchanger 21 using the circular heat transfer tube 23 on the windward side, the air before flowing into the heat exchanger 25 having the flat tubular heat transfer tube 27 is exchanged by the circular heat transfer tube 23. Can be rectified. For this reason, the air flowing into the heat exchanger 25 in which the flat tubular heat transfer tubes 27 are arranged is guided in parallel to the major axis direction of the flat tubular heat transfer tubes 27, and the pressure loss of the heat exchangers 20a to 20c is minimized. Can be kept in the state.

  Further, in the first embodiment, during the heating operation in which the heat exchangers 20a to 20c function as condensers (radiators), the refrigerant that has passed through the heat transfer tubes 27 (flat tubes) of the heat exchanger 25 is the heat exchanger 21. The heat transfer tube 27 and the heat transfer tube 23 are connected by piping so as to flow into the heat transfer tube 23 (circular tube). The heat transfer tube 27 and the heat transfer tube 23 are connected by piping so that the heat transfer tube 23 becomes a single refrigerant flow path. For this reason, at the time of heating operation, the refrigerant that has flowed into the heat transfer tube 23 (circular tube) from the refrigerant passages of the multiple systems merges at the heat transfer tube 23 (circular tube), and the refrigerant flow rate increases. Thereby, the heat exchange efficiency of the liquid refrigerant (supercooling) part with a low heat transfer rate located in the heat transfer tube 23 can be further improved while suppressing the pressure loss by the heat transfer tube 23 which is a circular tube. Therefore, the effect of improving the heat exchange efficiency as a total of the heat exchanger 21 and the heat exchanger 25 is also obtained.

  The indoor unit 100 according to Embodiment 1 is not particularly limited in the type of refrigerant (working refrigerant) flowing through the heat exchanger 20, but the heat exchanger 20 using the flat tubular heat transfer tube 27 is not R32 may be used as the working refrigerant.

  The heat exchanger 20 using the flat tubular heat transfer tube 27 has a narrower refrigerant flow path than the heat exchanger using the circular tubular heat transfer tube. For this reason, when the same amount of refrigerant circulates, the heat exchanger 20 using the flat tubular heat transfer tube 27 has a larger pressure loss than the heat exchanger using the circular tubular heat transfer tube. However, since R32 has a larger latent heat of vaporization at the same temperature than R410A, it can exhibit the same ability with a smaller amount of refrigerant circulation. For this reason, if R32 is used as the working refrigerant of the heat exchanger 20 using the flat tubular heat transfer tube 27, it is possible to reduce the amount of refrigerant circulation for producing the same capacity as compared with the case where R410A is used as the working refrigerant. it can. In other words, the flat tubular heat transfer tube 27 is able to mitigate an increase in the pressure loss of the refrigerant while fully utilizing the advantage of the heat exchanger 20 using the flat tubular heat transfer tube 27 that has high heat exchange efficiency. The combination of the heat exchanger 20 using R and the R32 refrigerant is compatible.

  Here, as for R32, the refrigerant | coolant filling amount is restrict | limited by slight flammability. However, since the heat exchanger 20 using the flat tubular heat transfer tube 27 has a narrow refrigerant flow path, the internal volume in the heat exchanger 20 can be kept small, and it is easy to cope with the direction of reducing the amount of refrigerant. In order to provide an air conditioner that does not deteriorate the heat exchange performance while clearing the restriction on reducing the amount of refrigerant when the refrigerant is restricted due to environmental regulations and has to select a refrigerant such as R32 having a slight flammability. For example, it is one of the effective means to configure the heat exchanger 20 using the flat tubular heat transfer tube 27.

(Detailed structure near the end of the heat exchanger)
Next, the detailed shape near the end of the heat exchanger 20 will be described.

FIG. 4 is an exploded perspective view showing the heat exchanger according to Embodiment 1 of the present invention. 5 to 7 are perspective views showing the vicinity of the end of the heat exchanger. FIG. 8 is a front view showing the vicinity of the end of the heat exchanger. FIG. 9 is an explanatory view showing a closing member provided in the vicinity of the end of the heat exchanger. Moreover, FIG. 10 is a principal part enlarged view which shows the state by which the closing member was provided in the edge part vicinity of this heat exchanger. In addition, FIG. 6 has shown the state which looked at the heat exchanger 20 shown in FIG. 4 from the back side. FIG. 9B is a front view of the closing member, FIG. 9A is a perspective view of the closing member shown in FIG. 9B viewed from the left side, and FIG. FIG. 10 shows a perspective view of the closing member shown in FIG.
Hereinafter, the detailed shape near the end of the heat exchanger 20 will be described with reference to FIGS. 4 to 10.

  At least one end of the heat transfer tube of the heat exchanger is complicatedly piped to join and branch the refrigerant flow path. In order to facilitate this pipe connection, in the heat exchanger 20 according to the first embodiment, a pipe joint 28 is connected to one end of each heat transfer tube 27 (flat tube). The pipe joint 28 has a flat tube shape in which the end portion on the heat transfer tube 27 side corresponds to the flat tubular heat transfer tube 27, and the end portion on the opposite side to the heat transfer tube 27 side has a circular tube shape. Then, by connecting the circular pipe portions of the pipe joint 28 with the circular pipe 29, the refrigerant flow paths of the heat transfer pipes 27 are joined and branched.

  Further, the fixing member 30 provided at the end of the heat exchanger 20 inserts the end of the heat transfer tube 23 (circular tube) and the circular pipe portion of the pipe joint 28 into the opening formed in the fixing member 30. By expanding the circular pipe portions of the heat transfer pipe 23 and the pipe joint 28, the pipe is fixed to the end of the heat exchanger 20. As shown in FIG. 4, in the first embodiment, the fixing member 30 is composed of a plurality of fixing members (fixing members 31 to 35). However, the fixing member 30 is integrally formed as one fixing member. Of course.

  Here, since a pipe joint 28 is connected to one end portion of the heat transfer tube 27 (flat tube), the connecting portion has a different external dimension from the heat transfer tube 27, and the fin 26 provided in each heat transfer tube 27. Can not be installed. For this reason, in the end portion of the heat transfer tube 27 (flat tube) on the side where the pipe joint 28 is connected, in the heat exchanger 25, the interval between the fixing member 30 and the fin 26 is increased. For this reason, during the cooling operation in which the heat exchanger 25 functions as an evaporator, the air that has passed between the fixing member 30 and the fins 26 enters the air path of the indoor unit 100.

  During the cooling operation, when the air that has passed between the fixed member 30 and the fins 26 enters the air passage of the indoor unit 100, the air that has passed between the fixed member 30 and the fins 26 (heat is not exchanged by the fins 26). Air) is mixed in the air passed between the fins 26 (air exchanged with the fins 26) and the air path of the indoor unit 100. If these airs are mixed in the air passage of the indoor unit 100, there is a concern that the air will be dewed on the air passage of the indoor unit 100, the blower 10 and the like, and dew may be generated. Further, during the cooling operation, when the air passing between the fixing member 30 and the fin 26 enters the air passage of the indoor unit 100, the dew adhering to the pipe joint 28 does not travel through the fin 26 (by the dew collecting mechanism). There is a concern that the air will enter the air passage of the indoor unit 100 (without being collected) and dew may occur.

  Therefore, in the first embodiment, by providing the closing member 40 on the leeward side between the fixing member 30 and the fin 26, the air passing between the fixing member 30 and the fin 26 is the air path of the indoor unit 100. To prevent intrusion. That is, by providing the closing member 40 on the leeward side between the fixing member 30 and the fins 26, dew caused by dew condensation on the air path of the indoor unit 100, the blower 10, and the like, or adhered to the pipe joint 28. Prevents dew escaping due to dew. Here, the closing member 40 corresponds to the first closing member in the present invention.

  The closing member 40 is made of, for example, resin, and includes a base 41, a protruding portion 42, a rib 43, and a rib 44. The base 41 has a flat plate shape, for example, and is attached to the inner surface side (side facing the fins 26) of the fixing member 30. In the first embodiment, for example, as shown in FIG. 11, the base 41 is fixed to the fixing member 30 with an aluminum screw 50. More specifically, the screw 50 is inserted into the through hole 30b formed in the fixing member 30, and the screw 50 is screwed into the screw hole 41a formed in the base 41 (the screw hole formed at a position aligned with the through hole 30b). By combining, the base 41 is fixed to the fixing member 30.

  The protruding portion 42 protrudes from, for example, the peripheral portion of the base 41 toward the fin 26. The protruding portion 42 has a shape that covers between the fixing member 30 and the fin 26 on the leeward side. Further, the end portion 42a of the protruding portion 42 extends to the vicinity of the dew recovery mechanism.

  The rib 43 protrudes from, for example, an end portion of the protruding portion 42 toward the windward side (the pipe joint 28 side). An upper end portion of the rib 43 is disposed to face the fin 26. In addition, a slight gap is formed between the fin 26 and the rib 43 so that the flow resistance between the fin 26 and the rib 43 is increased and the two do not contact each other. Here, the rib 43 corresponds to the second rib in the present invention. By providing the rib 43, dew adhering to the pipe joint 28 can be collected by the groove formed by the fixing member 30, the protruding portion 42, and the rib 43 and guided to the dew collecting mechanism. Further, since the ribs 43 and the fins 26 are not in contact with each other, the ribs 43 can be prevented from being cooled and dewed.

  The rib 44 extends from the rib 43 so as to face the leeward side end portion 26 a of the fin 26. In addition, a slight gap is formed between the leeward side end portion 26a of the fin 26 and the rib 44 so that the flow resistance between the fin 26 and the rib 44 is increased while the two do not come into contact with each other. Here, the rib 44 corresponds to the first rib in the present invention. Since the ribs 44 and the fins 26 are not in contact with each other, the ribs 44 can be prevented from being cooled and dewed.

  Further, a locking member 48 and a locking member 49 are provided at both end portions of the closing member 40 (for example, the end portion of the protruding portion 42). The locking member 48 and the locking member 49 are end portions of the heat exchanger 20 in a side view (more specifically, the heat transfer tube 27 or the pipe joint 28 disposed between the fixing member 30 and the fin 26 at the position). ). When the locking member 48 and the locking member 49 are locked and the closing member 40 is attached to the heat exchanger 20, each configuration of the closing member 40 (base 41, protrusion 42, rib 43, and rib 44) and The positional relationship between the components of the heat exchanger 20 (such as the fins 26 and the heat transfer tubes 27) is as described above. Here, the locking member 49 corresponds to the locking member in the present invention.

  The locking member 48 includes a substantially plate-shaped extending portion 48a extending from the end of the closing member 40 and a hook-shaped (hook-shaped) locking portion 48b provided at the tip of the extending portion 48a. And. Similarly, the locking member 49 has a substantially plate-shaped extending portion 49a extending from the end portion of the closing member 40 and a hook-shaped (hook-shaped) engagement provided at the distal end portion of the extending portion 49a. The stop part 49b is provided. The details of the locking member 48 and the locking member 49 will be described in the following method for attaching the closing member 40.

(How to attach the closing member)
The closing member 40 is attached to the heat exchanger 20 as follows.

12 and 13 are explanatory diagrams illustrating a method for attaching the closing member according to the first embodiment of the present invention. 12 is a side view showing a state before the closing member 40 is attached, and FIG. 13 is a perspective view showing a state before the closing member is attached. FIG. 13 is a perspective view of the heat exchanger as viewed from the same direction as FIG.
Moreover, FIG. 14 is a principal part enlarged view which shows the attachment state (state after attachment) of this blocking member, and is a perspective view which shows the edge part vicinity of a heat exchanger. 15 and 16 are enlarged views (perspective views) of main parts showing the vicinity of the locking member of the closing member.
Hereinafter, a method for attaching the closing member 40 to the heat exchanger 20 will be described with reference to FIGS.

  The blocking member 40 is inserted from the leeward side of the heat exchanger 20 as indicated by the white arrows in FIGS. 12 and 13. And the latching | locking part of the latching member 48 in the front-end part of the heat exchanger 20 in a side view (more specifically, the heat exchanger tube 27 or the pipe joint 28 arrange | positioned between the fixing member 30 and the fin 26 in the said position) 48b is engaged, and the rear end portion of the heat exchanger 20 in side view (more specifically, the heat transfer tube 27 or the pipe joint 28 disposed between the fixing member 30 and the fin 26 at the position) is engaged with the engagement member. The closing member 40 is attached to the heat exchanger 20 by locking the 49 locking portions 49b. In other words, the locking portion 48b of the locking member 48 is attached to the lower end portion of the heat exchanger 20a (more specifically, the heat transfer tube 27 or the pipe joint 28 disposed between the fixing member 30 and the fin 26 at the position). The engaging portion 49b of the engaging member 49 is engaged with the lower end portion of the heat exchanger 20c (more specifically, the heat transfer tube 27 or the pipe joint 28 disposed between the fixing member 30 and the fin 26 at the position). , The closing member 40 is attached to the heat exchanger 20.

  In the state where the closing member 40 is attached to the heat exchanger 20 (FIG. 14), the locking member 49 of the closing member 40 is as shown in FIG. That is, the width of the extended portion 49 a in the locking member 49 is larger than the width between the fixing member 30 and the fin 26. For this reason, in the state where the closing member 40 is attached to the heat exchanger 20, the extending portion 49 a is disposed so as to cover the end portion of the fin 26 and the end portion of the fixing member 30. Further, in a state in which the closing member 40 is attached to the heat exchanger 20, the locking portion 49 b of the closing member 40 is disposed so as to cover the heat transfer tube 27 and the pipe joint 28 at opposite positions. Therefore, when the heat exchanger 20 is assembled to the box 2, even if the rear end portion of the heat exchanger 20 comes into contact with the holding plate 2a or the like, the end portion of the fin 26 disposed at the rear end portion of the heat exchanger 20, The deformation of the heat transfer tube 27 and the pipe joint 28 can be prevented.

  A protruding piece 49c is formed at the end of the extending portion 49a on the fixing member 30 side so as to cover a part of the portion of the pipe joint 28 protruding from the fixing member 30. Thereby, even if the rear-end part of the heat exchanger 20 contacts the holding plate 2a etc., the deformation | transformation of the part which protrudes from the fixing member 30 of the pipe joint 28 can also be prevented.

  Further, in the state where the closing member 40 is attached to the heat exchanger 20, as shown in FIG. 15, the locking member 48 (the extended portion 48a and the locking portion 49b) of the closing member 40 is located at the opposite position. It arrange | positions so that the heat exchanger tube 27 and the pipe joint 28 may be covered. For this reason, when the heat exchanger 20 is assembled to the box 2, even if the front end of the heat exchanger 20 comes into contact with the holding plate 2 a or the like, the heat transfer tube 27 and the pipe joint 28 arranged at the front end of the heat exchanger 20. Can be prevented from being deformed.

  Note that the extended portion 48 a of the locking member 48 may be formed to have a width larger than the width between the fixing member 30 and the fins 26, similarly to the extended portion 49 a of the locking member 49. Thereby, even if the front-end part of the heat exchanger 20 contacts the holding plate 2a etc., the deformation | transformation of the edge part of the fin 26 arrange | positioned at the front-end part of the heat exchanger 20 can be prevented.

(Assembling method of heat exchanger)
Then, the attachment method (accommodation method) to the box 2 of the heat exchanger 20 is demonstrated.

17 and 18 are exploded side views showing the heat exchanger assembly method according to Embodiment 1 of the present invention.
The method of attaching the heat exchanger 20 according to the first embodiment to the box 2 is basically the same as the conventional method. For example, when an extension pipe 51 (a pipe connecting the heat exchanger 20 and the components of the outdoor unit) is connected to the heat exchanger 20, as shown by the white arrows in FIGS. The heat exchanger 20 is rotated with the joint portion 51 a of 51 as a fulcrum, and the heat exchanger 20 is assembled to the box 2. At this time, in the conventional indoor unit, the metal fixing member may be caught on the holding plate of the box, and it may be difficult to assemble the heat exchanger to the box. In addition, since the fixing member that supports the weight of the entire heat exchanger is generally formed as a metal part, the conventional indoor unit is made of resin when the metal fixing member is caught on the holding plate of the box. There was also a problem of scraping the box.

  However, in the indoor unit 100 according to the first embodiment, the fixing member 30 side end of the locking member 49 of the closing member 40 (more specifically, the extended portion 49a of the locking member 49) is fixed to the fixing member 30. It is provided so as to cover. That is, in the indoor unit 100 according to the first embodiment, the fixing member 30 side end of the locking member 49 of the closing member 40 (more specifically, the extending portion 49a of the locking member 49) is fixed to the fixing member 30. It protrudes outside. For this reason, when the heat exchanger 20 is assembled into the box 2, the end of the locking member 49 of the closing member 40 (more specifically, the extended portion 49 a of the locking member 49) is fixed to the holding plate of the box 2. 2a Slides with the inner surface to serve as a guide. For this reason, when the heat exchanger 20 is assembled into the box 2, the fixing member 30 can be prevented from being caught by the holding plate 2a of the box 2, and the assembling performance of the heat exchanger 20 can be improved. Further, since the closing member 40 is made of resin, it is possible to prevent the box from being scraped when the heat exchanger 20 is assembled into the box 2.

  As described above, in the indoor unit 100 configured as described above and the air conditioner including the indoor unit 100, the closing member 40 is provided on the leeward side between the fixed member 30 and the fin 26. It is possible to prevent air that has not been subjected to heat exchange from entering the air path of the indoor unit 100. For this reason, during the cooling operation, the air that passes between the fixing member 30 and the fins 26 (air that is not heat-exchanged by the fins 26) and the air that passes between the fins 26 (air that is heat-exchanged by the fins 26) and Mixing in the air path of the indoor unit 100 can be prevented, and it is possible to prevent the dew from occurring due to dew condensation on the air path of the indoor unit 100, the blower 10, and the like. Further, it is possible to prevent dew adhering to the pipe joint 28 from entering the air passage of the indoor unit 100 and causing dew jumping during the cooling operation.

  Further, the locking member 49 of the closing member 40 covers the pipe joint 28, the heat transfer pipe 27, and the fins 26 located at the rear end portion of the heat exchanger 20. For this reason, when the heat exchanger 20 is assembled to the box 2, it is possible to prevent the pipe joint 28, the heat transfer tube 27 and the fin 26 located at the rear end of the heat exchanger 20 from coming into contact with the box 2, and these are deformed. Since this can be prevented, the assembling property of the heat exchanger 20 can be improved.

  In addition, since the locking member 49 of the closing member 40 functions as a guide at the end on the fixing member 30 side, the fixing member 30 can be prevented from being caught by the holding plate 2a of the box 2, and the heat exchanger 20 can be assembled. The performance can be further improved. Further, since the closing member 40 is made of resin, it is possible to prevent the box from being scraped when the heat exchanger 20 is assembled into the box 2.

Further, by providing the rib 43 on the closing member 40, the dew adhering to the pipe joint 28 can be collected by the groove formed by the fixing member 30, the projecting portion 42 and the rib 43 and guided to the dew collecting mechanism. Further, by providing the rib 43 on the closing member 40, the flow resistance between the fin 26 and the rib 43 can be increased, and air not heat exchanged by the fin 26 enters the air path of the indoor unit 100. This can be prevented more reliably.
Moreover, by providing the rib 44 in the closing member 40, the flow resistance between the fin 26 and the rib 44 can be increased, and air that has not exchanged heat with the fin 26 enters the air passage of the indoor unit 100. This can be prevented more reliably.

  Further, in the indoor unit 100 configured as described above and the air conditioner including the indoor unit 100, the casing 1 can be shared with the casing of the indoor unit using a conventional circular heat transfer tube. It becomes. That is, by using the fixing member of the heat exchanger mounted on the conventional indoor unit as the fixing member 30 according to the first embodiment, the heat exchange efficiency of the casing of the indoor unit using the tubular heat transfer tube is improved. It is possible to mount a high heat exchanger 20 (a heat exchanger using a flat tubular heat transfer tube 27) according to the first embodiment. For this reason, when determining the piping configuration of the circular pipe 29, it is possible to design with the same design concept as before. Moreover, the cost and load concerning a design can be reduced significantly.

  In addition, although the material of each structural member of the heat exchanger 20 which concerns on this Embodiment 1 is not specifically limited, For example, you may make the material of each structural member of the heat exchanger 20 as follows. When the flat tubular heat transfer tube 27 is made of aluminum, aluminum alloy, or the like, the pipe joint 28, the fixing member 30 or the like may be made of aluminum, aluminum alloy, or the like. Thereby, it can prevent that a hole opens in the heat exchanger tube 27 by the electric corrosion by the contact of dissimilar metals, and a working refrigerant leaks.

Moreover, the structure of the heat exchanger 20 shown in this Embodiment 1 is an example to the last, and the row | line number and the stage number of the heat exchanger tube 23 and the heat exchanger tube 27 are arbitrary. For example, as shown in FIG. 19, the heat exchanger 20 may be configured using only the flat tubular heat transfer tube 27. That is, you may comprise the heat exchanger 20 only with the heat exchanger 25 using the flat tubular heat exchanger tube 27. FIG.
In the first embodiment,
(1) In the heat exchanger 21 using the tubular heat transfer tube 23, the fins 22 can be arranged up to the vicinity of the fixing member 30. For this reason, since air after heat-exchanging with the fin 22 and dehumidifying passes between the fixing member 30 and the fin 26, the amount of dew adhering to the pipe joint 28 is reduced.
(2) The design of the heat exchanger is improved by covering the windward side of the pipe joint 28 with the fins 22 and the heat transfer tubes 23.
The heat exchanger 20 is configured by arranging the heat exchanger 21 using the tubular heat transfer tube 23 on the windward side of the heat exchanger 25 using the flat tubular heat transfer tube 27. Yes.

Embodiment 2. FIG.
When the heat exchanger 20 is configured using only the flat tubular heat transfer tube 27, the shape of the closing member 40 may be set as follows, for example. In the second embodiment, items that are not particularly described are the same as those in the first embodiment, and the same functions and configurations are described using the same reference numerals.

FIG. 20 is an enlarged view of a main part showing a heat exchanger and a closing member according to Embodiment 2 of the present invention. FIG. 21 is a cross-sectional view taken along the line AA in FIG.
As shown in FIGS. 20 and 21, the heat exchanger 20 according to the second embodiment uses only a flat tubular heat transfer tube 27 as a heat transfer tube.

  In the closing member 40 according to the second embodiment, the end portion of the rib 43 extends to the windward side of the pipe joint 28. The rib 43 has a notch 43a into which the pipe joint 28 is inserted (so as to avoid the pipe joint 28). The notch 43a has a dimension such that the rib 43 and the heat exchanger 20 do not contact each other, and prevents the rib 43 from being cooled and dewed. A rib 45 protruding toward the fixing member 30 is provided at the end of the rib 43. The rib 45 is dimensioned to pass through a gap surrounded by the pipe joint 28, the fixing member 30 and the fin 26. Here, the rib 45 corresponds to the third rib in the present invention.

  As described above, in the indoor unit 100 configured as described above and the air conditioner including the indoor unit 100, the rib 45 is provided, so that the amount of air passing between the fixed member 30 and the fin 26 is suppressed. can do. For this reason, during the cooling operation, the air that passes between the fixing member 30 and the fins 26 (air that is not heat-exchanged by the fins 26) and the air that passes between the fins 26 (air that is heat-exchanged by the fins 26) and Mixing in the air path of the indoor unit 100 can be further prevented, and it is possible to further prevent the occurrence of dew jumping due to dew condensation on the air path of the indoor unit 100, the blower 10 and the like. In addition, it is possible to further prevent dew adhering to the pipe joint 28 from entering the air passage of the indoor unit 100 and causing dew jumping during cooling operation.

  Further, since the rib 45 is dimensioned to pass through the gap surrounded by the pipe joint 28, the fixing member 30 and the fin 26, after assembling the heat exchanger 20, the closing member 40 is connected to the leeward side of the heat exchanger 20. Can be attached from. That is, the closing member 40 according to the second embodiment can pass the rib 45 through the gap surrounded by the pipe joint 28, the fixing member 30, and the fins 26 after attaching the fixing member 30 to the heat exchanger 20. . For this reason, even when the connection between the heat transfer tube 27 and the pipe joint 28 and the connection between the pipe joint 28 and the circular pipe 29 are performed by brazing, the closing member 40 can be prevented from being exposed to high temperatures during brazing. Therefore, the closing member can be formed of resin.

  The rib 45 does not necessarily have to be disposed on the windward side of the pipe joint 28. The ribs 45 may be arranged between the adjacent pipe joints 28, or the ribs 45 may be arranged on the leeward side of the pipe joints 28. That is, the position of the rib 45 is arbitrary as long as the amount of air passing between the fixing member 30 and the fin 26 can be suppressed.

Embodiment 3 FIG.
By providing the following plate member to the closing member 40 according to the second embodiment, it is possible to further prevent the occurrence of dew. In Embodiment 3, items that are not particularly described are the same as those in Embodiment 1 or Embodiment 2, and the same functions and configurations are described using the same reference numerals.

  FIG. 22 is an essential part enlarged view showing a heat exchanger and a blocking member according to Embodiment 3 of the present invention. FIG. 23 is a sectional view taken along line BB in FIG.

  The shape of the heat exchanger 20 and the closing member 40 according to the third embodiment is the same as that of the second embodiment. However, in the third embodiment, the plate-like member 46 is provided on the rib 45 of the closing member 40. The plate-like member 46 has a shape that covers the space between the fixing member 30 and the fins 26 on the windward side. A through hole 46 a is formed in the plate member 46, and a screw hole 45 a is formed in the rib 45 of the closing member 40 at a position corresponding to the through hole 46 a. The plate-like member 46 is fixed to the rib 45 of the closing member 40 by screwing the screw inserted into the through hole 46 a into the screw hole 45 a. Here, the plate-like member 46 corresponds to the second closing member in the present invention.

  As described above, in the indoor unit 100 configured as described above and the air conditioner including the indoor unit 100, the amount of air passing between the fixed member 30 and the fins 26 is further suppressed as compared with the second embodiment. be able to. For this reason, during the cooling operation, the air that passes between the fixing member 30 and the fins 26 (air that is not heat-exchanged by the fins 26) and the air that passes between the fins 26 (air that is heat-exchanged by the fins 26) and Mixing in the air path of the indoor unit 100 can be further prevented, and it is possible to further prevent the occurrence of dew jumping due to dew condensation on the air path of the indoor unit 100, the blower 10 and the like. In addition, it is possible to further prevent dew adhering to the pipe joint 28 from entering the air passage of the indoor unit 100 and causing dew jumping during cooling operation.

  Further, by covering the windward side of the pipe joint 28 with the plate-like member 46, the design of the heat exchanger is also improved.

Embodiment 4 FIG.
When the heat transfer tubes 27 arranged in a plurality of rows are arranged in a staggered manner, or when the heat exchanger 20 has a substantially U-shape in cross section as shown in the first embodiment, the rib 43 Cannot be inserted between the pipe joints 28, and the second closing member (plate member 46) shown in the third embodiment may not be provided. Even if the second closing member shown in the third embodiment can be provided, the arrangement of the heat transfer tubes 27 may be limited. Even if the second closing member shown in the third embodiment can be provided, it may be necessary to change the shape of the closing member 40 every time the arrangement of the heat transfer tubes 27 is changed. In such a case, the second closing member may be configured as follows, for example. In the fourth embodiment, items not particularly described are the same as those in the first to third embodiments, and the same functions and configurations are described using the same reference numerals.

FIG. 24 is an enlarged view of a main part showing a heat exchanger and a blocking member according to Embodiment 4 of the present invention. FIG. 25 is an explanatory view showing a second closing member according to the fourth embodiment of the present invention.
In the heat exchanger 20 according to the fourth embodiment, the heat transfer tubes 27 are arranged in, for example, two rows in a staggered manner.

  In such a case, it is difficult to provide the second closing member (plate member 46) as shown in the third embodiment. Therefore, in the fourth embodiment, the blocking member 40 shown in the first embodiment is provided as the first blocking member. That is, in the fourth embodiment, the closing member 40 shown in the first embodiment is used to cover the leeward side between the fixing member 30 and the fins 26. A closing member 47 is provided as a second closing member, and covers the windward side between the fixing member 30 and the fins 26.

  The closing member 47 is formed in a substantially U shape in a sectional view. A through hole 47b is formed on one end side of the closing member 47, and a screw hole 30a is formed in the fixing member 30 at a position corresponding to the through hole 47b. The closing member 47 is fixed to the fixing member 30 by screwing the screw inserted into the through hole 47b into the screw hole 30a. Further, a cutout portion 47 a into which the heat transfer tube 27 is inserted (so as to avoid the heat transfer tube 27) is formed at the other end portion of the closing member 47. The closing member 47 is provided such that the other end bites between the fins 26.

  As described above, in the indoor unit 100 configured as described above and the air conditioner using the indoor unit 100, the configuration of the heat exchanger 20 (such as the arrangement of the heat transfer tubes 27 and the shape of the heat exchanger 20) is limited. The closing member 47 can cover the windward side between the fixing member 30 and the fin 26.

  The member for attaching the closing member 47 is not limited to the fixing member 30. As long as the closing member 47 can be installed and fixed from the windward side of the heat exchanger 20, the member to which the closing member 47 is attached is arbitrary.

  DESCRIPTION OF SYMBOLS 1 Housing | casing, 1a Suction port, 1b Air outlet, 2 boxes, 2a Holding plate, 2b rib, 3 Front frame, 4 Front opening / closing panel, 5 Nozzle, 6 Wind direction adjustment mechanism, 6a Vertical vane, 7 Filter, 8 Electrical goods Box, 10 blower, 11 blade, 20 (20a to 20c) heat exchanger, 21 heat exchanger, 22 fin, 23 heat transfer tube (circular tube), 25 heat exchanger, 26 fin, 27 heat transfer tube (flat tube), 28 pipe joint, 29 circular pipe, 30 fixing member, 30a screw hole, 30b through hole, 31-35 fixing member, 40 closing member, 41 base, 41a screw hole, 42 protrusion, 43 rib, 43a notch, 44 Rib, 45 Rib, 45a Screw hole, 46 Plate member, 46a Through hole, 47 Closing member, 47a Notch, 47b Through hole, 48 Locking member, 8a extending portion, 48b engaging portion, 49 the locking member, 49a extending portion, 49b engaging portion, 49c projecting piece, 51 extension piping, 51a joint portion, 100 indoor unit.

Claims (12)

A housing in which the air outlet and the suction port are formed, and a heat exchanger accommodated in the housing,
The heat exchanger is an indoor unit of an air conditioner that is attached to the housing via fixing members provided at both ends of the heat exchanger, and an air passage is formed between the fixing members,
The heat exchanger includes a plurality of first fins arranged via a predetermined gap, and a plurality of flat tubes provided through the first fins,
At least one end portion of the flat tube is provided with a pipe joint fixed to the fixing member in an end portion on the opposite side to the flat tube side in a circular tube shape,
On the leeward side of the pipe joint, a first closing member for closing an air path between the first fin and the fixing member is provided,
The first blocking member includes at least one locking member that is locked to an end of the heat exchanger in a side view and attaches the first blocking member to the heat exchanger.
The locking member is
Locked to the pipe joint or the flat pipe disposed between the first fin and the fixing member,
An indoor unit of an air conditioner that covers end portions of the pipe joint, the flat tube, and the first fin in a range facing the locking member. The locking member is
Made of resin,
The fixing member side end of the locking member is locked so as to cover the fixing member,
When the heat exchanger is assembled to the casing, the end of the locking member on the fixing member side and the side surface of the casing slide to guide the heat exchanger to the mounting position of the casing. The indoor unit for an air conditioner according to claim 1, wherein the indoor unit is a guide.   The protruding piece which covers a part of part which protruded outside from the said fixing member of the said pipe joint is formed in the edge part by the side of the said fixing member in the said locking member. Air conditioner indoor unit.   The indoor unit of an air conditioner according to any one of claims 1 to 3, wherein the pipe joint is fixed to the fixing member by expanding the pipe joint.   5. The first rib according to claim 1, wherein the first closing member is provided with a first rib protruding at a position facing at least a part of the leeward side end surface portion of the first fin. The indoor unit of the air conditioner as described in any one of Claims.   The indoor unit of an air conditioner according to any one of claims 1 to 5, wherein the first closing member includes a second rib protruding toward the windward side. The second rib is formed with a notch into which the pipe joint is inserted,
The air conditioner according to claim 6, further comprising a third rib projecting toward the fixing member to which the pipe joint is fixed, at an upwind end portion of the second rib. Indoor unit. The third rib is disposed on the windward side of the pipe joint,
The indoor of an air conditioner according to claim 7, wherein a second closing member for closing an air passage between the first fin and the fixing member is provided on the third rib. Machine.   The second closing member that is disposed on the windward side of the pipe joint and blocks an air passage between the first fin and the fixing member is provided. The air conditioner indoor unit according to any one of the above.   The indoor unit of the air conditioner according to any one of claims 1 to 9, wherein R32 is used as a refrigerant flowing in the flat tube. The heat exchanger includes a plurality of second fins arranged via a predetermined gap, and a plurality of circular tubes provided through the second fins,
The air conditioner according to any one of claims 1 to 10, wherein the circular pipe and the second fin are arranged on the windward side of the flat pipe and the first fin. Indoor unit of the machine.   The air conditioner provided with the indoor unit of the air conditioner as described in any one of Claims 1-11.

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