JP2019027614A - Heat exchanging device and air conditioner - Google Patents

Abstract

To propose a heat exchanging device that facilitates refrigerant to evenly flow into each of multiple refrigerant flowing pipes of a heat exchanger including the refrigerant flowing pipes through which refrigerant flows in parallel and which are aligned in parallel, and to propose an air conditioner.SOLUTION: A heat exchanging device includes: a pair of header pipes 32, 33 substantially aligned in parallel; a heat exchanger 31 including multiple flat pipes 35 which are installed between the pair of header pipes 32, 33, through which refrigerant flows in parallel and which are substantially aligned on the same horizontal flat surface; and a blower for ventilating the heat exchanger 21.SELECTED DRAWING: Figure 4

Description

  Embodiments according to the present invention relate to a heat exchange device such as an indoor unit or an outdoor unit of an air conditioner, and an air conditioner, for example.

  There is known an air conditioner including a heat exchanger having a plurality of flat tubes arranged in parallel as a refrigerant flow tube through which a refrigerant flows in order to improve heat exchange efficiency. The longitudinal direction of the plurality of flat tubes extends in the horizontal direction. The heat exchanger includes a hollow header connected to one end of a plurality of flat tubes and a hollow header connected to the other side of the plurality of flat tubes. The longitudinal directions of both headers are oriented in the vertical direction. In other words, the plurality of flat tubes are arranged in the vertical direction.

  As another arrangement, the longitudinal direction of the plurality of flat tubes extends while being inclined with respect to the vertical direction. The heat exchanger includes a hollow upper header connected to upper ends of the plurality of flat tubes, and a hollow lower header connected to lower ends of the plurality of flat tubes. The longitudinal directions of both headers are oriented in the horizontal direction.

Japanese Patent Laying-Open No. 2015-230129

  In the heat exchanger, it is desired to flow the refrigerant uniformly through all the refrigerant flow pipes in order to improve efficiency. However, in a heat exchanger having a header, there is a problem that when the liquid refrigerant is flowed when used as an evaporator, the flow is not uniform for each flat tube. For example, in a heat exchanger in which the longitudinal direction of the header described above is directed in the vertical direction, more liquid refrigerant flows in the flat tube located on the lower side from the gravity applied to the liquid refrigerant, and the flat tube located on the upper side flows. Only a little liquid refrigerant flows. Furthermore, the flat pipe has a high pressure loss because the internal refrigerant flow passage is narrow. For this reason, there has been a problem that the flow becomes excessively uneven.

  On the other hand, in the case of a heat exchanger in which the longitudinal direction of the header is a horizontal direction, for example, when liquid refrigerant flows in from the upper header and reaches the lower header through a flat tube, the gravity acting on the liquid refrigerant is reduced. Due to the influence, a large amount of liquid refrigerant flows through the flat tube near the inlet of the upper header, and the flow rate of liquid refrigerant flowing through the flat tube decreases as the distance from the flat tube increases. Therefore, a temperature difference occurs in the heat exchanger, and the heat exchange efficiency is lowered.

  Therefore, in the conventional heat exchanger, both headers are divided into a plurality of rooms, and a liquid refrigerant is passed between the headers a plurality of times via a flat tube. Further, in the conventional heat exchanger, the liquid refrigerant is caused to flow in from both ends of the upper header, and the liquid refrigerant is caused to flow out from the center part of the lower header.

  However, the structure for causing the refrigerant to flow between the headers as in the conventional heat exchanger and the structure for supplying the refrigerant from a plurality of locations of the header are accompanied by complication of the structure of the heat exchanger.

  There is also known an air conditioner that can adjust the air conditioning capacity by changing the refrigerant flow rate by changing the speed of the compressor by an inverter device. In the case of this type of air conditioner, when the header branching type heat exchanger as described above is used, it is further possible to set a structure in which liquid refrigerant flows uniformly through a plurality of refrigerant flow pipes regardless of changes in refrigerant flow rate. It becomes difficult.

  Therefore, the present invention provides a heat exchange device in which the refrigerant flows in parallel and allows the refrigerant to easily flow into each refrigerant flow tube of a heat exchanger including a plurality of refrigerant flow tubes arranged in parallel, and air Propose a harmony machine.

  In order to solve the above problems, a heat exchange device according to an embodiment of the present invention includes a pair of header pipes arranged substantially in parallel, and a refrigerant that is installed between the pair of header pipes and flows in parallel. A heat exchanger having a plurality of refrigerant flow tubes arranged on substantially the same horizontal plane; and a blower for ventilating the heat exchanger.

  An air conditioner according to an embodiment of the present invention includes an indoor unit, a first heat exchanger accommodated in the indoor unit, an outdoor unit, a compressor accommodated in the outdoor unit, and the outdoor unit. A second heat exchanger accommodated in the outdoor unit, a throttle mechanism accommodated in the outdoor unit, the first heat exchanger, the compressor, the second heat exchanger, and the throttle mechanism connected in order And at least one of the first heat exchanger and the second heat exchanger has a plurality of refrigerant flow pipes in which the refrigerant flows in parallel and is arranged in a substantially horizontal direction. doing.

The block diagram of the air conditioner which concerns on embodiment of this invention. The top view of the heat exchanger of the air conditioner which concerns on this embodiment. The partial perspective view of the heat exchanger of the air conditioner concerning this embodiment. The perspective view of the outdoor unit of the air conditioner which concerns on embodiment of this invention. 1 is a schematic cross-sectional view of an outdoor unit for an air conditioner according to an embodiment of the present invention. The schematic side view of the installation state of the heat exchanger of the air conditioner which concerns on embodiment of this invention. The schematic sectional drawing of the other example of the outdoor unit of the air harmony machine concerning the embodiment of the present invention. The schematic sectional drawing of the other example of the outdoor unit of the air harmony machine concerning the embodiment of the present invention. The schematic sectional drawing of the other example of the outdoor unit of the air harmony machine concerning the embodiment of the present invention.

  An embodiment of an air conditioner according to the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same or equivalent structure in several drawing.

  FIG. 1 is a block diagram of an air conditioner according to an embodiment of the present invention.

  As shown in FIG. 1, the air conditioner 1 according to this embodiment includes an indoor unit 2 and an outdoor unit 3. Each of the indoor unit 2 and the outdoor unit 3 functions as a heat exchange device.

  The indoor unit 2 includes an indoor heat exchanger 11 as a first heat exchanger and an indoor unit housing 12. The indoor unit 2 includes an indoor blower 13 that promotes heat exchange between the indoor air and the indoor heat exchanger 11.

  The indoor blower 13 ventilates the indoor heat exchanger 11. The indoor blower 13 blows out the air heat-exchanged with the indoor heat exchanger 11 from the indoor unit 2. The indoor blower 13 includes a propeller fan 13a and a power source that drives the propeller fan 13a, for example, an electric motor 13b.

  The outdoor unit 3 includes a compressor 15, a four-way valve 16, an outdoor heat exchanger 17 as a second heat exchanger, a throttle mechanism 18, and an outdoor unit housing 19. The outdoor unit 3 includes an outdoor fan 21 that promotes heat exchange between the outdoor air and the outdoor heat exchanger 17.

  The throttle mechanism 18 is, for example, a PMV (Pulse Motor Valve, electronic expansion valve) or a capillary tube.

  The outdoor blower 21 ventilates the outdoor heat exchanger 17. The outdoor blower 21 blows out the air heat-exchanged with the outdoor heat exchanger 17 from the outdoor unit 3. The outdoor blower 21 includes a propeller fan 21a and a power source that drives the propeller fan 21a, for example, an electric motor 21b.

  The air conditioner 1 also includes a refrigerant pipe 23 that connects the compressor 15, the four-way valve 16, the outdoor heat exchanger 17, the throttle mechanism 18, and the indoor heat exchanger 11 to distribute the refrigerant.

  The refrigerant pipe 23 sequentially connects the compressor 15, the four-way valve 16, the outdoor heat exchanger 17, the throttle mechanism 18, and the indoor heat exchanger 11.

  The refrigerant pipe 23 includes a first refrigerant pipe 23 a that connects the discharge port 15 a of the compressor 15 and the four-way valve 16, a second refrigerant pipe 23 b that connects the four-way valve 16 and the suction port 15 b of the compressor 15, and the four-way valve 16. A third refrigerant pipe 23c connecting the outdoor heat exchanger 17 to the outdoor heat exchanger 17, a fourth refrigerant pipe 23d connecting the outdoor heat exchanger 17 and the throttle mechanism 18, and a first pipe connection portion 25a of the throttle mechanism 18 and the outdoor unit 3. A fifth refrigerant pipe 23e that connects the first pipe connection part 25a of the outdoor unit 3 and a second pipe connection part 25b of the indoor unit 2, and a second pipe connection part 25b of the indoor unit 2. A seventh refrigerant pipe 23g connecting the indoor heat exchanger 11 to the indoor heat exchanger 11, an eighth refrigerant pipe 23h connecting the indoor heat exchanger 11 and the third pipe connecting portion 25c of the indoor unit 2, and a third pipe connection of the indoor unit 2. Ninth refrigerant that connects the portion 25c and the fourth pipe connection portion 25d of the outdoor unit 3 A tube 23i, includes a tenth refrigerant pipe 23j for connecting the fourth pipe connecting portion 25d and the four-way valve 16 of the outdoor unit 3, a.

  The sixth refrigerant pipe 23f and the ninth refrigerant pipe 23i allow the refrigerant to pass between the outdoor unit 3 and the indoor unit 2.

  Each of the first pipe connection part 25a and the fourth pipe connection part 25d is a refrigerant pipe 23 on the outdoor unit 3 side, that is, a first refrigerant pipe 23a, a second refrigerant pipe 23b, a third refrigerant pipe 23c, and a fourth refrigerant pipe 23d. Also, it serves as a joint corresponding to the entrance and exit of the fifth refrigerant pipe 23e and the tenth refrigerant pipe 23j.

  Each of the 2nd piping connection part 25b and the 3rd piping connection part 25c serves as the coupling corresponded to the refrigerant | coolant piping 23 by the side of the indoor unit 2, ie, the 7th refrigerant | coolant piping 23g, and the 8th refrigerant | coolant piping 23h.

  The air conditioner 1 also includes a control unit 27 that is electrically connected to the four-way valve 16 via a signal line (not shown).

  The control unit 27 includes a central processing unit (not shown), a storage device (not shown) for storing various arithmetic programs executed by the central processing unit, parameters, and the like. The control unit 27 reads various control programs from the auxiliary storage device into the main storage device, and executes the various control programs read into the main storage device by the central processing unit.

  The control unit 27 controls the four-way valve 16 based on an operation input to a remote controller (not shown), and performs a cooling operation of the air conditioner 1 (a refrigerant flow indicated by a broken line in FIG. 1) and a heating operation ( In FIG. 1, the refrigerant flow (shown by a solid line) is switched.

  During the cooling operation, the air conditioner 1 discharges the high-temperature and high-pressure gas refrigerant compressed from the compressor 15 and sends the refrigerant to the outdoor heat exchanger 17 via the four-way valve 16. The outdoor heat exchanger 17 exchanges heat between the outdoor air and the refrigerant, and cools the refrigerant into a high-pressure liquid state. That is, the outdoor heat exchanger 17 functions as a condenser. The refrigerant that has passed through the outdoor heat exchanger 17 passes through the throttle mechanism 18 and is reduced in pressure to become a low-pressure liquid refrigerant and reaches the indoor heat exchanger 11. The indoor heat exchanger 11 exchanges heat between the indoor air and the liquid refrigerant, cools the air blown into the indoor space, and evaporates the refrigerant to make a transition from the gas-liquid two-phase state to the gas state. The indoor heat exchanger 11 functions as an evaporator. The refrigerant that has passed through the indoor heat exchanger 11 is sucked back into the compressor 15.

  On the other hand, during the heating operation, the air conditioner 1 reverses the four-way valve 16 to cause the refrigerant flow in the opposite direction to the refrigerant flow during the cooling operation in the refrigeration cycle. The indoor heat exchanger 11 functions as a condenser, and the outdoor heat exchanger 17 functions as an evaporator.

  Note that the air conditioner 1 may not be provided with the four-way valve 16 and may be dedicated to cooling. In this case, the discharge port 15a of the compressor 15 is directly connected to the outdoor heat exchanger 17 via the refrigerant pipe 23, and the suction port 15b of the compressor 15 is directly connected to the indoor heat exchanger 11 via the refrigerant pipe 23. Connected. In this case, the indoor heat exchanger 11 always functions as an evaporator.

  FIG. 2 is a plan view of the heat exchanger of the air conditioner according to the present embodiment.

  FIG. 3 is a partial perspective view of the heat exchanger of the air conditioner according to the present embodiment.

  As shown in FIGS. 2 and 3, at least one of the outdoor heat exchanger 17 and the indoor heat exchanger 11 is a header diversion type. Of the outdoor heat exchanger 17 and the indoor heat exchanger 11, the header diversion type is hereinafter simply referred to as a heat exchanger 31.

  The heat exchanger 31 extends in a rectangular plate shape. The heat exchanger 31 includes a pair of header pipes 32 and 33 arranged substantially in parallel as a header diversion type, and a flat pipe 35 that is a plurality of refrigerant flow pipes laid between the header pipes 32 and 33. And corrugated fins 36 provided between adjacent flat tubes 35.

  The header pipes 32 and 33, the flat tubes 35, and the corrugated fins 36 are made of aluminum or aluminum alloy. The header pipes 32 and 33, the flat tube 35, and the corrugated fins 36 are integrated by brazing.

  The header pipes 32 and 33 are disposed in a portion corresponding to two opposing sides of the rectangular plate-shaped heat exchanger 31. An end cap 37 made of aluminum is provided at the opening ends of the header pipes 32 and 33. Each end cap 37 is brazed to the header pipes 32 and 33. One header pipe 32 is an upstream header pipe 32 that introduces refrigerant into the flat tube 35, and the other header pipe 33 is a downstream header pipe 33 that discharges refrigerant from the flat tube 35.

  In an air conditioner capable of cooling and heating, the flow of the refrigerant is reversed between the cooling operation and the heating operation. Therefore, here, the liquid refrigerant when the heat exchanger 31 functions as an evaporator is used. Based on the flow, the two header pipes 32 and 33 are named upstream and downstream.

  The plurality of flat tubes 35 are arranged on substantially the same horizontal plane. That is, the plurality of flat tubes 35 extend substantially in the horizontal direction. The plurality of flat tubes 35 are arranged substantially in the horizontal direction. The plurality of flat tubes 35 are straight tubes arranged substantially at equal intervals.

  The flat tube 35 has a flat shape extending in the air flow direction (ventilation direction) of the heat exchanger 31. The flat tube 35 has a rounded rectangular cross-sectional shape. The flat tube 35 has a short side in the in-plane direction of the heat exchanger 31, that is, the direction in which the plurality of flat tubes 35 are arranged, and the out-of-plane direction of the heat exchanger 31, that is, the direction through the front and back of the heat exchanger 31. The long side is facing. A pair of adjacent flat tubes 35 face a wide surface corresponding to the long side in the cross section.

  The flat tube 35 has a plurality of rectangular refrigerant flow passages 35a. The refrigerant flow passage 35a extends substantially horizontally in the flat tube 35. The refrigerant flow passages 35 a are arranged in the long side direction of the flat tube 35. In other words, the refrigerant flow passages 35a are arranged in the direction in which the air ventilated through the heat exchanger 31 flows. Such a flat tube 35 having a plurality of fine refrigerant flow passages 35a therein is generally manufactured by extrusion molding of aluminum.

  The corrugated fin 36 is a V-shaped continuous body having a predetermined height. The corrugated fins 36 are thin aluminum plates having alternately mountain folds and valley folds. The corrugated fins 36 are sandwiched between the wide surfaces of the flat tubes 35 facing each other.

  An aluminum side plate 38 is provided outside the corrugated fin 36 located at the edge of the heat exchanger 31. The side plate 38 is brazed to the corrugated fin 36. The side plates 38 are a pair of rectangular plate-shaped heat exchangers 31, which are different from the sides of the header pipes 32 and 33, and are disposed at portions corresponding to two opposing sides. That is, the heat exchanger 31 draws a rectangle by a pair of opposing header pipes 32 and 33 and a pair of opposing side plates 38.

  Next, the outdoor unit 3 including the header diverting heat exchanger 31 described above as the outdoor heat exchanger 17 will be described in detail.

  FIG. 4 is a perspective view of the outdoor unit of the air conditioner according to the embodiment of the present invention.

  As shown in FIG. 4, the outdoor unit housing 19 of the outdoor unit 3 of the air conditioner 1 according to the present embodiment has a quadrangular columnar appearance. The outdoor unit 3 includes four side plates 41 that cover the front, rear, left, and right side surfaces, a top plate 42 that covers the ceiling surface, and a bottom plate 43 that covers the bottom surface.

  The side plate 41 has a plurality of suction holes 45 for sucking outside air into the outdoor unit 3. In FIG. 4, the lower part of the side plate 41 is cut out.

  A circular exhaust hole 44 for exhausting the outside air sucked into the outdoor unit 3 from the suction hole 45 of the side plate 41 to the outside of the outdoor unit 3 is provided at the center of the top plate 42. The top plate 42 is provided with a cylindrical bell mouth 46 connected to the exhaust hole 44.

  The interior of the outdoor unit housing 19 is divided by a partition plate 47. A machine chamber 48 is defined between the partition plate 47 and the bottom plate 43, and a heat exchange chamber 49 is defined between the partition plate 47 and the top plate 42.

  In the vicinity of each of the four corners of the bottom plate 43, a frame 51 extending in the vertical direction is provided.

  Near the front end portion of the bottom surface of the bottom plate 43, a front leg portion 52 is provided over substantially the entire width of the outdoor unit 3. Further, a rear leg 53 is provided in the vicinity of the rear end of the bottom plate 43 under the substantially entire width of the outdoor unit 3.

  The front leg portion 52 and the rear leg portion 53 are provided with flange portions 55 that bend and extend substantially at right angles toward the outside of the outdoor unit 3. The flange portion 55 is fixed to the installation surface of the outdoor unit 3 by a fixture (not shown) such as an anchor bolt and supports the outdoor unit 3.

  In the machine room 48, the compressor 15, the refrigerant pipe 23, a pipe connection portion (not shown) corresponding to the end of the refrigerant pipe in the outdoor unit 3, and an inverter for driving and controlling the compressor 15 and the outdoor blower 21 A control unit 27 including a device and the like is accommodated.

  The compressor 15 is installed on the bottom plate 43. The compressor 15 is disposed below the outdoor heat exchanger 17 and at the bottom of the outdoor unit 3. The compressor 15 is driven at a variable speed by an inverter device in the control unit 27 according to the state of the air conditioning load on the indoor unit side. As a result, the flow rate of the refrigerant flowing through the refrigeration cycle including the indoor heat exchanger 17 changes.

  In the heat exchange chamber 49, the outdoor heat exchanger 17 and the outdoor blower 21 are accommodated.

  The suction hole 45 of the side plate 41 is connected to a space below the outdoor heat exchanger 17. The suction hole 45 introduces outside air into the heat exchange chamber 49.

  The outdoor blower 21 sucks air from the space below the outdoor heat exchanger 17 through the exhaust hole 44 of the top plate 42 and exhausts it from the bell mouth 46. The propeller fan 21 a of the outdoor fan 21 blows air upward of the outdoor unit 3.

  FIG. 5 is a schematic cross-sectional view of an outdoor unit of an air conditioner according to an embodiment of the present invention.

  FIG. 6 is a schematic side view of the installation state of the heat exchanger of the air conditioner according to the embodiment of the present invention.

  As shown in FIGS. 5 and 6, the outdoor unit 3 of the air conditioner 1 according to this embodiment includes an outdoor heat exchanger 17 that is disposed substantially horizontally in the heat exchange chamber 49. In other words, the outdoor heat exchanger 17 has a plurality of flat tubes 35 that extend substantially in the horizontal direction and are arranged substantially in the horizontal direction. That is, the heat exchanger 31 is disposed substantially horizontally.

  The flat tube 35 only needs to extend substantially in the horizontal direction. The extending direction of the flat tube 35 does not necessarily need to completely follow the horizontal plane H (angle formed, zero degree). The extending direction of the flat tube 35 may have a maximum inclination of 15 degrees with respect to the horizontal plane H, but the inclination angle θ is more preferably 10 degrees or less.

  The header pipes 32 and 33 of the outdoor heat exchanger 17 also extend substantially in the horizontal direction. The extending direction of the header pipes 32 and 33 is better to follow the horizontal plane H than the flat tube 35. In other words, the angle formed by the extending direction of the header pipes 32 and 33 and the horizontal plane H is preferably smaller than the angle formed by the extending direction of the flat tube 35 and the horizontal plane H. The extending direction of the header pipes 32 and 33 is substantially the same as the alignment direction of the plurality of flat tubes 35. In other words, the plurality of flat tubes 35 are arranged substantially in the horizontal direction. The alignment direction of the plurality of flat tubes 35 follows the horizontal plane H rather than the flat tubes 35.

  When the flat tube 35 is inclined with respect to the horizontal plane H, the upstream header pipe 32 that introduces the refrigerant into the flat tube 35 out of the pair of header pipes 32 and 33 is more than the downstream header pipe 33. It is preferable that it exists above.

  The outdoor heat exchanger 17 has a flat tube 35 and a plurality of fins (in the direction intersecting the flat tube 35 and arranged in the length direction of the flat tube 35) in addition to the header diversion heat exchanger 31. (Not shown). The fin has a flat plate shape extending in a direction intersecting the flat tube 35. The fin has a plurality of fitting portions (not shown) into which the flat tube 35 is fitted. These fitting portions are arranged in a comb shape. By brazing in a state where the flat tube 35 is fitted to the fitting portion, the fin and the flat tube 35 are integrally joined. The fitting part has a notch groove shape or a punched hole shape that opens to the windward side.

  The outdoor blower 21 sucks air from a space below the outdoor heat exchanger 17, and blows out the air exchanged through the outdoor heat exchanger 17 to the upper side of the outdoor unit 3. Note that the outdoor blower 21 sucks air from a space below the outdoor heat exchanger 17 and blows out the air that has passed through the outdoor heat exchanger 17 to the side of the outdoor unit 3. good.

  Next, another example of the outdoor unit 3 of the air conditioner 1 according to the present embodiment will be described. In addition, in outdoor unit 3A, 3B, and 3C demonstrated in each example, the same code | symbol is attached | subjected to the same structure as the outdoor unit 3, and the overlapping description is abbreviate | omitted.

  FIG. 7 is a schematic cross-sectional view of another example of the outdoor unit of the air conditioner according to the embodiment of the present invention.

  As shown in FIG. 7, the outdoor unit 3 </ b> A of the air conditioner 1 according to this embodiment includes a plurality of outdoor heat exchangers 17 having flat tubes 35. The outdoor heat exchangers 17 are arranged in the vertical direction and in layers at intervals.

  When the outdoor heat exchanger 17 having the flat tube 35 is accommodated in the outdoor unit 3, the ground contact area of the outdoor unit 3 needs to include at least the main surface of the outdoor heat exchanger 17. Therefore, by arranging the outdoor heat exchangers 17 in multiple layers in a hierarchical manner, the ground contact area of the outdoor unit 3 for obtaining the same ability can be reduced.

  FIG. 8 is a schematic cross-sectional view of another example of the outdoor unit for an air conditioner according to an embodiment of the present invention.

  As shown in FIG. 8, the outdoor unit 3B of the air conditioner 1 according to the present embodiment includes an outdoor blower 21B. The propeller fan 21a of the outdoor blower 21B is disposed on the side of at least one outdoor heat exchanger 17. In the present embodiment, a plurality of outdoor heat exchangers 17 are provided in the projection area PA in the rotation center line direction of the propeller fan 21a. The plurality of outdoor heat exchangers 17 are arranged in the vertical direction like the outdoor unit 3A in FIG. 7, and are arranged in layers at intervals. The outdoor heat exchanger 17 is also provided on the top surface of the outdoor unit 3.

  Unlike the outdoor units 3 and 3A in which the air flows from the lower surface of the outdoor heat exchanger 17 toward the upper surface, the outdoor unit 3B causes the air to flow from the upper surface to the lower surface of the outdoor heat exchanger 17.

  FIG. 9 is a schematic cross-sectional view of another example of the outdoor unit for an air conditioner according to an embodiment of the present invention.

  As shown in FIG. 9, the outdoor unit 3 </ b> C of the air conditioner 1 according to the present embodiment is a fin-and-tube second outdoor heat exchange housed in the outdoor unit 3 together with the outdoor heat exchanger 17 having the flat tube 35. A container 61 is provided.

  The second outdoor heat exchanger 61 has a rectangular plate-like appearance. The 2nd outdoor heat exchanger 61 is provided with the heat exchanger tube (illustration omitted) and many thin flat fins (illustration abbreviation). The fin is provided with a hole through which the heat transfer tube is inserted. A large number of fins are arranged at substantially equal intervals with their main surfaces facing each other. The heat transfer tubes cross the fins so as to pierce the front and back of the plate-like fins. The second outdoor heat exchanger 61 directs the extending direction of the fins in the vertical direction of the outdoor unit 3C.

  The second outdoor heat exchanger 61 faces the suction hole 45 of the side plate 41 of the outdoor unit 3C. The second outdoor heat exchanger 61 may face a plurality of side plates 41 among the side plates 41 of the four outdoor units 3C. For example, the second outdoor heat exchanger 61 may be a pair of L-shaped fin tube heat exchangers that face each other. The pair of L-shaped fin tube heat exchangers can be arranged in a square column shape throughout the outdoor unit 3C.

  The outdoor blower 21 causes the air sucked from the suction hole 45 to exchange heat with the second outdoor heat exchanger 61 and further exchanges heat with the outdoor heat exchanger 17 and blows it out of the outdoor unit 3.

  Note that the configuration of the outdoor unit 3 shown in FIGS. 5 to 9 can be applied to the indoor unit 2. That is, the header shunt-type heat exchanger 31 may be applied to the indoor heat exchanger 11.

  In this case, the indoor unit 2 including the header diverting heat exchanger 31 as the indoor heat exchanger 11 includes the indoor heat exchanger 11 disposed substantially horizontally in the heat exchange chamber 49. In other words, the indoor heat exchanger 11 has a flat tube 35 extending substantially in the horizontal direction.

  The indoor unit 2 may include a plurality of indoor heat exchangers 11 each having a flat tube 35. The indoor heat exchangers 11 are arranged in a vertical direction and in layers at intervals.

  Further, the propeller fan 13 a of the indoor blower 13 of the indoor unit 2 may be disposed on the side of at least one outdoor heat exchanger 17. A plurality of indoor heat exchangers 11 may be provided in the projection region in the direction of the rotation center line of the propeller fan 13a. The plurality of indoor heat exchangers 11 may be arranged in a vertical direction and in layers at intervals. The indoor heat exchanger 11 may also be provided on the top surface of the indoor unit 2.

  Furthermore, the indoor unit 2 may include a fin-and-tube type second indoor heat exchanger (not shown) accommodated in the indoor unit 2 together with the indoor heat exchanger 11 having the flat tube 35.

  The air conditioner 1 and the heat exchanging apparatus (indoor unit 2, outdoor units 3, 3A, 3B, and 3C) according to the present embodiment configured as described above have a plurality of flats arranged on substantially the same horizontal plane. An outdoor heat exchanger 17 having a pipe 35 is provided. Therefore, the air conditioner 1 and the heat exchange device (the indoor unit 2, the outdoor units 3, 3A, 3B, and 3C) weaken the influence of gravity on the liquid refrigerant flowing into the flat tubes 35 from the upstream header pipe 32. Can do. That is, the air conditioner 1 and the heat exchange device (the indoor unit 2, the outdoor units 3, 3A, 3B, and 3C) can distribute the refrigerant easily and evenly to the plurality of flat tubes 35. it can. This substantially uniformly arranges the circulation amount of the refrigerant for the entire outdoor heat exchanger 17 (the entire surface) having the flat tube 35, and improves the efficiency of heat exchange. The same applies to the indoor heat exchanger 11 having the flat tube 35 extending substantially in the horizontal direction. Moreover, even if the refrigerant flow rate is varied by the inverter device, the influence of gravity on the liquid refrigerant can be weakened, so that the refrigerant can be evenly distributed and distributed from the header pipe 32 to each flat tube 35, Heat exchange efficiency can be improved.

  In addition, the air conditioner 1 and the heat exchanger (the indoor unit 2, the outdoor units 3, 3A, 3B, and 3C) according to the present embodiment include the heat exchanger 31 that uses the corrugated fins 36 as the outdoor heat exchanger 17. It has. By the way, when performing heating operation, condensed water adheres to the outdoor heat exchanger 17 that functions as an evaporator. When the heat exchanger 31 using the corrugated fins 36 is applied to the outdoor heat exchanger 17, drainage of the condensed water and defrosting of frost derived from the condensed water become a problem. The corrugated fin 36 has a structure in which V shapes are connected. Therefore, if the flat tube 35 is erected in the vertical direction, condensed water accumulates in the gaps between the corrugated fins 36. The condensed water accumulated in the gaps between the corrugated fins 36 significantly reduces the heat exchange efficiency of the heat exchanger 31. However, the air conditioner 1 includes the header diversion type heat exchanger 31 as the outdoor heat exchanger 17, while the heat exchanger 31 is laid substantially horizontally. Therefore, the air conditioner 1 can easily drain the condensed water from the gap (V-shaped gap) between the corrugated fins 36. That is, the condensed water adhering to the corrugated fins 36 of the air conditioner 1 is dropped along the surface of the corrugated fins 36 due to its own weight and drained. The same applies to the case where the heat exchanger 31 using the corrugated fins 36 is provided as the indoor heat exchanger 11 and the cooling operation is performed. The same effect can be obtained not only in the corrugated fins 36 but also in the heat exchanger 31 provided with fins (not shown) that intersect perpendicularly with the flat tubes 35.

  Furthermore, the air conditioner 1 according to the present embodiment includes a compressor 15 disposed below the outdoor heat exchanger 17 and at the bottom of the outdoor unit 3. Therefore, the outdoor unit 3 of the air conditioner 1 has high installation stability and high productivity.

  Furthermore, the air conditioner 1 according to the present embodiment includes a plurality of outdoor heat exchangers 17 each having a flat tube 35 and arranged in the vertical direction. Therefore, the air conditioner 1 can reduce the ground contact area of the outdoor unit 3 for obtaining the same ability as compared with the case where only one set of the outdoor heat exchanger 17 that is laid horizontally is provided. The same applies to the indoor unit 2 including the header diversion type heat exchanger 31 as the indoor heat exchanger 11.

  In addition, the air conditioner 1 according to the present embodiment includes an outdoor blower 21 disposed on the side of at least one outdoor heat exchanger 17. Therefore, the air conditioner 1 can increase the volumetric efficiency by suppressing the height of the outdoor unit housing 19. The same applies to the indoor unit 2 including the header diversion type heat exchanger 31 as the indoor heat exchanger 11.

  Furthermore, the air conditioner 1 according to the present embodiment includes an outdoor blower 21 that blows air upward of the outdoor unit 3. Therefore, the air conditioner 1 can easily supply the maximum air volume to the header branching type heat exchanger 31 laid down substantially horizontally while suppressing the volume of the outdoor unit 3.

  Furthermore, the air conditioner 1 according to the present embodiment includes a fin-and-tube second outdoor heat exchanger 61. Therefore, the air conditioner 1 arranges the second outdoor heat exchanger 61 along the inner surface of the side plate 41 of the outdoor unit housing 19, and divides the header substantially in the horizontal direction. The volumetric efficiency of the outdoor unit housing 19 can be improved.

  Therefore, according to the air conditioner 1 and the heat exchange device (the indoor unit 2, the outdoor units 3, 3A, 3B, and 3C) according to the present embodiment, the refrigerant flows in parallel, and a plurality of flats arranged in parallel. It is easy to allow the refrigerant to flow evenly into the flat tubes 35 of the heat exchanger 31 including the tubes 35.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Air conditioner, 2 ... Indoor unit, 3, 3A, 3B, 3C ... Outdoor unit, 11 ... Indoor heat exchanger, 12 ... Indoor unit housing, 13 ... Indoor fan, 13a ... Propeller fan, 13b ... Electric motor, DESCRIPTION OF SYMBOLS 15 ... Compressor, 15a ... Discharge port, 15b ... Suction port, 16 ... Four-way valve, 17 ... Outdoor heat exchanger, 18 ... Throttle mechanism, 19 ... Outdoor unit housing | casing, 21, 21B ... Outdoor fan, 21a ... Propeller fan , 21b ... electric motor, 27 ... control unit, 31 ... heat exchanger, 32 ... upstream header pipe, 33 ... downstream header pipe, 35 ... flat tube (refrigerant flow pipe), 35a ... refrigerant flow path, 36 ... corrugated fin 37 ... End cap, 38 ... Side plate, 41 ... Side plate, 42 ... Top plate, 43 ... Bottom plate, 44 ... Exhaust hole, 45 ... Suction hole, 46 ... Bellmouth, 47 ... Partition plate, 48 ... Machine room, 49 ... Heat exchange chamber, 61 Second outdoor heat exchanger.

Claims (14)

Heat having a pair of header pipes arranged substantially in parallel, and a plurality of refrigerant flow pipes that are installed between the pair of header pipes and in which the refrigerant flows in parallel and are arranged on the same horizontal plane. An exchange,
A heat exchanger comprising: a blower that ventilates the heat exchanger. A pair of header pipes arranged substantially in parallel, and a plurality of refrigerant flow pipes that are installed between the pair of header pipes to allow the refrigerant to flow in parallel, and are substantially horizontally installed A heat exchanger,
A heat exchanger comprising: a blower that ventilates the heat exchanger. Each said refrigerant | coolant circulation pipe | tube is a heat exchange apparatus of Claim 2 provided with the some refrigerant | coolant flow path into which a refrigerant | coolant flows in parallel. The heat exchange apparatus according to any one of claims 1 to 3, wherein the refrigerant flow pipe is a flat pipe having a flat shape extending in a ventilation direction of the heat exchanger. The heat exchange apparatus according to any one of claims 1 to 4, further comprising a corrugated fin provided between the adjacent refrigerant flow pipes. Indoor unit,
A first heat exchanger housed in the indoor unit;
Outdoor unit,
A compressor housed in the outdoor unit;
A second heat exchanger accommodated in the outdoor unit;
A throttle mechanism housed in the outdoor unit;
The first heat exchanger, the compressor, the second heat exchanger, and a refrigerant pipe that circulates the refrigerant by connecting the throttle mechanism in order,
At least one of the first heat exchanger and the second heat exchanger is an air conditioner having a plurality of refrigerant flow pipes in which refrigerant flows in parallel and is arranged in a substantially horizontal direction. The air conditioner according to claim 6, wherein the refrigerant flow pipe has a plurality of refrigerant flow passages extending in a substantially horizontal direction therein. The air conditioner according to claim 6 or 7, wherein the refrigerant circulation pipe is a flat pipe having a flat shape extending in a ventilation direction of the heat exchanger. The one having the flat tube among the first heat exchanger and the second heat exchanger includes the plurality of flat tubes and corrugated fins provided between the adjacent flat tubes. The air conditioner described. The air conditioner according to any one of claims 6 to 9, wherein the compressor is disposed below the second heat exchanger and at a bottom portion of the outdoor unit. The air conditioner according to any one of claims 6 to 10, wherein there are a plurality of the first heat exchangers and the second heat exchangers having the refrigerant flow pipes arranged in a vertical direction. . A blower that blows out air that has undergone heat exchange with the refrigerant circulation pipe among the first heat exchanger and the second heat exchanger from at least one of the indoor unit and the outdoor unit;
The air conditioner according to claim 11, wherein the blower includes a propeller fan, and the propeller fan is disposed on a side of at least one of the first heat exchanger or the second heat exchanger. A blower that blows out the air heat-exchanged by the second heat exchanger from the outdoor unit;
The air conditioner according to any one of claims 6 to 10, wherein the blower includes a propeller fan and blows air upward of the outdoor unit. A fin-and-tube third heat exchanger housed in the indoor unit together with the first heat exchanger having the refrigerant flow pipe, and a housed in the outdoor air unit together with the second heat exchanger having the flat tube. The air conditioner according to any one of claims 6 to 13, comprising at least one of a fin-and-tube fourth heat exchanger.

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