JP5445576B2 - Heat exchanger and refrigeration equipment - Google Patents

Description

  The present invention relates to a heat exchanger and a refrigeration apparatus.

  Conventionally, for example, a heat exchanger having a pair of header collecting pipes and a plurality of tubes communicating with each other like the heat exchanger described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2010-112580) Has been proposed.

  In the heat exchanger described in Patent Document 1 (Japanese Patent Laid-Open No. 2010-112580), a refrigerant flow is provided between a pair of header collecting pipes by providing a partition plate that divides the internal space of the header collecting pipe up and down. It is configured to reciprocate.

  In the heat exchanger described in Patent Document 1 (Japanese Patent Laid-Open No. 2010-112580) described above, there is room for improvement in the shape of the upper end portion of the header collecting pipe.

  For example, an example in which a lid member is fixed to the header collecting pipe body with respect to the upper end of the header collecting pipe of the heat exchanger can be considered. Since it is only the inner surface of the tube body, it is difficult to increase the bonding strength.

  On the other hand, in order to secure a wider joint portion between the lid member and the header collecting pipe body, for example, an opening is formed inside the end portion of the header collecting pipe body, and the lid member is inserted through the opening. It is possible to insert them and fix them together. However, in this case, a space is created in which the upper surface of the lid member is surrounded by the inner peripheral surface of the header collecting pipe body. And when condensed water, rain water, etc. adhering to the heat exchanger enter the space, it becomes difficult to discharge the water out of the space, and corrosion of members around the water There are problems that occur or ice grows.

  This invention is made | formed in view of the point mentioned above, The objective of this invention is ensuring the drainage property on a cover member, maintaining the adhering state of a cover member and a header collecting pipe main body favorably. An object of the present invention is to provide a heat exchanger and a refrigeration apparatus that can perform the above-described operation.

A heat exchanger according to a first aspect of the present invention includes a plurality of flat tubes, a header collecting pipe to which the flat tubes are connected, and a plurality of fins joined to the flat tubes, A heat exchanger in which a fluid flowing inside exchanges heat with air flowing outside the flat tube, and the header collecting pipe includes a header collecting pipe body and a lid member. The header collecting pipe body is provided such that the longitudinal direction is the vertical direction. The lid member is provided inside the upper end of the header collecting pipe body and closes the upper side of the header collecting pipe body. The header collecting pipe body has a pipe end portion extending upward from the lid member. A drainage part is formed in a part of the pipe end part. The drainage part is a groove formed with a part of the pipe end portion recessed downward.

  In this heat exchanger, it is possible to drain condensed water, rainwater, and the like that may exist above the lid member via a drainage section provided in the header collecting pipe body. For this reason, it becomes possible to make it difficult to produce corrosion in the vicinity of the upper end of the header collecting pipe.

Moreover, in this heat exchanger, since a drainage part can be formed by forming a groove | channel by denting down a part of pipe end part among header header pipe main bodies, manufacture becomes easy.

In the heat exchanger according to the second aspect of the present invention, in the heat exchanger according to the second aspect, the lower end portion of the drainage groove is located below the upper end portion of the lid member.

  In this heat exchanger, since the drainage groove has a portion lower than the upper end portion of the lid member, it is possible to discharge all the amount of water accumulated above the lid member.

  A heat exchanger according to a third aspect of the present invention includes a plurality of flat tubes, a header collecting pipe to which the flat tubes are connected, and a plurality of fins joined to the flat tubes, A heat exchanger in which a fluid flowing inside exchanges heat with air flowing outside the flat tube, and the header collecting pipe includes a header collecting pipe body and a lid member. The header collecting pipe body is provided such that the longitudinal direction is the vertical direction. The lid member is provided inside the upper end of the header collecting pipe body and closes the upper side of the header collecting pipe body. The header collecting pipe body has a pipe end portion extending upward from the lid member. A drainage portion is formed in a part of the pipe end portion. In the drainage part, the upper part of the radially outer end of the lid member is missing in the pipe end part.

A heat exchanger according to a fourth aspect of the present invention is the heat exchanger according to any one of the first to third aspects, wherein at least a part of the outer peripheral portion of the lid member is other than the pipe end portion of the header collecting pipe. It is sandwiched from above and below between the part and the tube end portion.

  In this heat exchanger, the upper part of the lid member has a part in contact with the pipe end part, and the lower part of the lid member has a part in contact with the part other than the pipe end part of the header collecting pipe main body. . For this reason, it is possible to further strengthen the fixation between the header collecting pipe body and the lid member.

  In the refrigeration apparatus according to the fifth aspect of the present invention, the compressor, the first heat exchanger, the expansion valve, and the second heat exchanger that is any one of the heat exchangers of the first to fourth aspects are connected to each other. The refrigerant circuit comprised by being made is provided. The refrigerant circuit can cause the second heat exchanger to function as at least a refrigerant evaporator.

  In this refrigeration system, when the second heat exchanger functions as a refrigerant evaporator, even if condensed water may accumulate in the upper end portion of the header collecting pipe, it can be easily drained through the drainage section. Is possible.

In the heat exchanger according to the first aspect of the present invention, it becomes possible to make it difficult to cause corrosion near the upper end of the header collecting pipe, and the manufacture becomes easy.

In the heat exchanger according to the second aspect of the present invention, it is possible to discharge all the amount of water accumulated above the lid member.

  In the heat exchanger according to the fourth aspect of the present invention, it is possible to further firmly fix the header collecting pipe body and the lid member.

  In the refrigeration apparatus according to the fifth aspect of the present invention, even if condensed water may accumulate in the upper end portion of the header collecting pipe, it can be easily drained through the drainage section.

The circuit diagram for demonstrating the outline | summary of a structure of the air conditioning apparatus which concerns on one Embodiment. The perspective view which shows the external appearance of an air-conditioning outdoor unit. Typical sectional drawing for demonstrating the outline | summary of arrangement | positioning of each apparatus of an air-conditioning outdoor unit. The external appearance schematic perspective view which shows an outdoor heat exchanger, gas refrigerant | coolant piping, and liquid refrigerant | coolant piping. The typical rear view which shows schematic structure of an outdoor heat exchanger. The schematic rear view for demonstrating the structure of an outdoor heat exchanger. The partial expanded sectional view for demonstrating the structure of the heat exchange part of an outdoor heat exchanger. The schematic perspective view which shows the attachment state of the heat-transfer fin in an outdoor heat exchanger. The external appearance perspective view which shows the upper end part vicinity of a header pipe main body. The side view seen from the side where the flat multi-hole pipe of a header collecting pipe main body is connected. The front view side view of a header collecting pipe main body. The external perspective view of a baffle. The top view schematic diagram of a baffle. FIG. 14 is a schematic side view of the baffle viewed from the left side of FIG. 13. The side view schematic diagram which shows the state inserted until just before a baffle plastically deformed. The side view schematic diagram which shows the state which insertion was completed in the state which the baffle deformed plastically. The external appearance perspective view which shows the mode of the insertion destination side in the state by which the baffle as a partition plate was inserted and fixed to the header collecting pipe main body. The external appearance perspective view which shows the mode on the opposite side to the insertion destination of the state by which the baffle as a partition plate was inserted and fixed to the header collecting pipe main body. The external appearance perspective view which shows the state by which the edge part vicinity of the header pipe main body was block | closed with the baffle. Side surface sectional drawing of the state by which the edge part vicinity of the header collecting pipe main body was block | closed with the baffle. The external appearance perspective view which shows the state by which the edge part vicinity of the header pipe main body which concerns on the modification A was block | closed with the baffle as a cover member. The external appearance perspective view which shows the state by which the edge part vicinity of the header pipe main body which concerns on the modification B was block | closed with the baffle as a cover member.

(1) Overall Configuration of Air Conditioner FIG. 1 is a circuit diagram illustrating an outline of a configuration of an air conditioner according to an embodiment of the present invention.

  The air conditioner 1 is an apparatus used for air conditioning in a building in which the air conditioning indoor unit 3 is installed by performing a vapor compression refrigeration cycle operation, and uses the air conditioning outdoor unit 2 as a heat source side unit, The air conditioning indoor unit 3 as a side unit is connected by refrigerant communication pipes 6 and 7.

  The refrigerant circuit configured by connecting the air-conditioning outdoor unit 2, the air-conditioning indoor unit 3, and the refrigerant communication pipes 6 and 7 includes a compressor 91, a four-way switching valve 92, an outdoor heat exchanger 20, an expansion valve 40, and indoor heat. The exchanger 4 and the accumulator 93 are connected by a refrigerant pipe. A refrigerant is sealed in the refrigerant circuit, and a refrigeration cycle operation is performed in which the refrigerant is compressed, cooled, decompressed, heated and evaporated, and then compressed again. As the refrigerant, for example, one selected from R410A, R407C, R22, R134a, carbon dioxide, and the like is used.

(2) Detailed configuration of air conditioner (2-1) Air-conditioning indoor unit The air-conditioning indoor unit 3 is installed on a wall surface of the room by wall hanging or the like, or is embedded or suspended in a ceiling of a room such as a building. The air conditioning indoor unit 3 has an indoor heat exchanger 4 and an indoor fan 5. The indoor heat exchanger 4 is, for example, a cross fin type fin-and-tube heat exchanger composed of heat transfer tubes and a large number of fins, and functions as a refrigerant evaporator during cooling operation to cool indoor air. In the heating operation, the heat exchanger functions as a refrigerant condenser and heats indoor air.

(2-2) Air Conditioning Outdoor Unit The air conditioning outdoor unit 2 is installed outside a building or the like, and is connected to the air conditioning indoor unit 3 via the refrigerant communication pipes 6 and 7. As shown in FIGS. 2 and 3, the air-conditioning outdoor unit 2 has a substantially rectangular parallelepiped unit casing 10.

  As shown in FIG. 3, the air conditioner outdoor unit 2 has a structure in which the blower chamber S <b> 1 and the machine chamber S <b> 2 are formed by dividing the internal space of the unit casing 10 into two by a partition plate 18 extending in the vertical direction. (So-called trunk type structure). The air conditioner outdoor unit 2 includes an outdoor heat exchanger 20 and an outdoor fan 95 disposed in the blower chamber S1 of the unit casing 10, and includes a compressor 91 and four compressors disposed in the machine chamber S2 of the unit casing 10. A path switching valve 92, an accumulator 93, an expansion valve 40, a gas refrigerant pipe 31, and a liquid refrigerant pipe 32 are provided.

  The unit casing 10 includes a bottom plate 12, a top plate 11, a side plate 13 on the blower chamber side, a side plate 14 on the machine chamber side, a front plate 15 on the blower chamber side, and a front plate 16 on the machine chamber side. Make up body.

  The air conditioner outdoor unit 2 is configured to suck outdoor air into the blower chamber S <b> 1 in the unit casing 10 from a part of the back surface and side surface of the unit casing 10, and blow out the sucked outdoor air from the front surface of the unit casing 10. . Specifically, the suction port 10a and the suction port 10b with respect to the blower chamber S1 in the unit casing 10 include an end portion on the back side of the side plate 13 on the blower chamber side and an end portion on the blower chamber S1 side of the side plate 14 on the machine chamber side. And is formed over. Moreover, the blower outlet 10c is provided in the fan chamber side front board 15, The front side is covered with the fan grill 15a.

  The compressor 91 is a hermetic compressor driven by a compressor motor, for example, and is configured to be able to vary the operation capacity.

  The four-way switching valve 92 is a mechanism for switching the direction of refrigerant flow. During the cooling operation, the four-way switching valve 92 connects the refrigerant pipe on the discharge side of the compressor 91 and the gas refrigerant pipe 31 extending from one end (gas side end) of the outdoor heat exchanger 20, and via the accumulator 93. Then, the refrigerant communication pipe 7 for the gas refrigerant and the refrigerant pipe on the suction side of the compressor 91 are connected (see the solid line of the four-way switching valve 92 in FIG. 1). During the heating operation, the four-way switching valve 92 connects the refrigerant pipe on the discharge side of the compressor 91 and the refrigerant communication pipe 7 for the gas refrigerant, and also connects the suction side and the outdoor heat of the compressor 91 via the accumulator 93. A gas refrigerant pipe 31 extending from one end (gas side end) of the exchanger 20 is connected (see the broken line of the four-way switching valve 92 in FIG. 1).

  The outdoor heat exchanger 20 is disposed upright in the blower chamber S1 in the vertical direction (vertical direction) and faces the suction ports 10a and 10b. The outdoor heat exchanger 20 is an aluminum heat exchanger, and in the present embodiment, the one having a design pressure of about 3 MPa to 4 MPa is used. In the outdoor heat exchanger 20, the gas refrigerant pipe 31 extends from one end (gas side end) so as to be connected to the four-way switching valve 92. The liquid refrigerant pipe 32 extends from the other end (liquid side end) of the outdoor heat exchanger 20 so as to be connected to the expansion valve 40.

  The accumulator 93 is connected between the four-way switching valve 92 and the compressor 91. The accumulator 93 has a gas-liquid separation function that divides the refrigerant into a gas phase and a liquid phase. The refrigerant flowing into the accumulator 93 is divided into a liquid phase and a gas phase, and the gas phase refrigerant that collects in the upper space is supplied to the compressor 91.

  The outdoor fan 95 supplies outdoor air to the outdoor heat exchanger 20 for heat exchange with the refrigerant flowing through the outdoor heat exchanger 20.

  The expansion valve 40 is a mechanism for decompressing the refrigerant in the refrigerant circuit, and is an electric valve capable of adjusting the opening degree. The expansion valve 40 is provided between the outdoor heat exchanger 20 and the refrigerant communication pipe 6 for liquid refrigerant in order to adjust the refrigerant pressure and the refrigerant flow rate, and allows the refrigerant to be used in both the cooling operation and the heating operation. Has the function of expanding.

  The outdoor fan 95 is disposed in the blower chamber S1 so as to face the outdoor heat exchanger 20. The outdoor fan 95 sucks outdoor air into the unit, causes the outdoor heat exchanger 20 to perform heat exchange between the refrigerant and the outdoor air, and then discharges the air after heat exchange to the outside. The outdoor fan 95 is a fan capable of changing the air volume of air supplied to the outdoor heat exchanger 20, and is, for example, a propeller fan driven by a motor such as a DC fan motor.

(3) Operation of the air conditioner (3-1) Cooling operation During the cooling operation, the four-way switching valve 92 is in the state indicated by the solid line in FIG. 1, that is, the discharge side of the compressor 91 is connected via the gas refrigerant pipe 31. It is connected to the gas side of the outdoor heat exchanger 20, and the suction side of the compressor 91 is connected to the gas side of the indoor heat exchanger 4 via the accumulator 93 and the refrigerant communication pipe 7. The opening of the expansion valve 40 is adjusted so that the degree of superheat of the refrigerant at the outlet of the indoor heat exchanger 4 (that is, the gas side of the indoor heat exchanger 4) is constant. When the compressor 91, the outdoor fan 95, and the indoor fan 5 are operated in the state of the refrigerant circuit, the low-pressure gas refrigerant is compressed by the compressor 91 to become a high-pressure gas refrigerant. This high-pressure gas refrigerant is sent to the outdoor heat exchanger 20 via the four-way switching valve 92. Thereafter, the high-pressure gas refrigerant is condensed in the outdoor heat exchanger 20 by exchanging heat with the outdoor air supplied by the outdoor fan 95 to become a high-pressure liquid refrigerant. The supercooled high-pressure liquid refrigerant is sent from the outdoor heat exchanger 20 to the expansion valve 40. The refrigerant that has been decompressed to near the suction pressure of the compressor 91 by the expansion valve 40 and is in a low-pressure gas-liquid two-phase state is sent to the indoor heat exchanger 4 and performs heat exchange with indoor air in the indoor heat exchanger 4. Evaporates into a low-pressure gas refrigerant.

  This low-pressure gas refrigerant is sent to the air-conditioning outdoor unit 2 via the refrigerant communication pipe 7 and again sucked into the compressor 91. As described above, in the cooling operation, the air conditioner 1 uses the outdoor heat exchanger 20 as the refrigerant condenser compressed in the compressor 91 and the indoor heat exchanger 4 as the refrigerant condensed in the outdoor heat exchanger 20. To function as an evaporator.

(3-2) Heating Operation During the heating operation, the four-way switching valve 92 is in the state indicated by the broken line in FIG. 1, that is, the discharge side of the compressor 91 is on the gas side of the indoor heat exchanger 4 via the refrigerant communication pipe 7. And the suction side of the compressor 91 is connected to the gas side of the outdoor heat exchanger 20 via the gas refrigerant pipe 31. The opening of the expansion valve 40 is adjusted so that the degree of supercooling of the refrigerant at the outlet of the indoor heat exchanger 4 becomes constant at the target value of the degree of supercooling. When the compressor 91, the outdoor fan 95, and the indoor fan 5 are operated in the state of this refrigerant circuit, the low-pressure gas refrigerant is sucked into the compressor 91 and compressed to become a high-pressure gas refrigerant, and the four-way switching valve 92, And it is sent to the air conditioning indoor unit 3 via the refrigerant communication pipe 7.

  Then, the high-pressure gas refrigerant sent to the air conditioning indoor unit 3 undergoes heat exchange with room air in the indoor heat exchanger 4 to condense into a high-pressure liquid refrigerant, and then passes through the expansion valve 40. Further, the pressure is reduced according to the opening degree of the expansion valve 40. The refrigerant that has passed through the expansion valve 40 flows into the outdoor heat exchanger 20. The low-pressure gas-liquid two-phase refrigerant flowing into the outdoor heat exchanger 20 exchanges heat with the outdoor air supplied by the outdoor fan 95 to evaporate into a low-pressure gas refrigerant. Then, the air is sucked into the compressor 91 again. As described above, in the heating operation, the air conditioner 1 uses the indoor heat exchanger 4 as a refrigerant condenser compressed in the compressor 91 and the outdoor heat exchanger 20 as a refrigerant condensed in the indoor heat exchanger 4. To function as an evaporator.

(4) Detailed Configuration of Outdoor Heat Exchanger (4-1) Overall Configuration of Outdoor Heat Exchanger Next, FIG. 4 showing a schematic external perspective view of the outdoor heat exchanger 20, and a schematic rear view of the outdoor heat exchanger The structure of the outdoor heat exchanger 20 will be described in detail with reference to FIG.

  The outdoor heat exchanger 20 includes a heat exchanging portion 21 that exchanges heat between the outdoor air and the refrigerant, and the heat exchanging portion 21 includes a large number of heat transfer fins 21a and a large number of flat multi-hole tubes 21b. Has been. The heat transfer fins 21a and the flat multi-hole tube 21b are both made of aluminum or an aluminum alloy. The flat multi-hole tube 21b functions as a heat transfer tube, and transfers heat moving between the heat transfer fins 21a and outdoor air to the refrigerant flowing inside.

  The outdoor heat exchanger 20 includes aluminum header collecting pipes 22 and 23, one on each end of the heat exchanger 21.

  The header collecting pipe 22 has internal spaces 22a and 22b partitioned in the vertical direction by the first baffle 22c. A gas refrigerant pipe 31 is connected to the upper internal space 22a, and a liquid refrigerant pipe 32 is connected to the lower internal space 22b.

  The interior of the header collecting pipe 23 is partitioned in the vertical direction by a second baffle 23f, a third baffle 23g, a fourth baffle 23h, and a fifth baffle 23i to form internal spaces 23a, 23b, 23c, 23d, and 23e. . Among these, to the three internal spaces 23 a, 23 b, 23 c of the header collecting pipe 23, many flat multi-hole pipes 21 b connected to the internal space 22 a above the header collecting pipe 22 are connected. In addition, a large number of flat multi-hole pipes 21 b connected to the internal space 22 b below the header collecting pipe 22 are connected to the three inner spaces 23 c, 23 d, and 23 e of the header collecting pipe 23.

  In the present embodiment, each of the baffles is a component that is used not only as a partition plate of the header collecting pipe body 50 but also as a lid member. The baffle 60 will be described as a representative.

  Further, the uppermost internal space 23 a and the lowermost internal space 23 e of the header collecting pipe 23 are connected by a connecting pipe 24. The internal space 23b in the second stage from the top and the internal space 23d in the second stage from the bottom are connected by a connecting pipe 25. The intermediate internal space 23c connects a part of the upper part (part connected to the upper internal space 22a) and a part of the lower part (part connected to the lower internal space 22b) of the heat exchange unit 21. It also plays a function. With these configurations, for example, during cooling operation, the gas refrigerant supplied to the internal space 23a above the header collecting pipe 23 by the gas refrigerant pipe 31 exchanges heat at the upper part of the heat exchanging portion 21 as shown by the arrows in FIG. The liquid is liquefied, turned back at the header collecting pipe 23, passes through the lower part of the heat exchanging section 21, and goes out from the liquid refrigerant pipe 32. During the heating operation, the refrigerant flow is in the opposite direction to the flow indicated by the arrows in FIG.

(4-2) Configuration of Heat Exchange Part FIG. 7 is a partially enlarged view showing a cross-sectional structure in a plane perpendicular to the flat direction of the flat multi-hole tube 21b of the heat exchange part 21 of the outdoor heat exchanger 20. FIG. 8 is a schematic perspective view showing a mounting state of the heat transfer fins 21 a in the outdoor heat exchanger 20.

  The heat transfer fins 21a are thin aluminum or aluminum alloy flat plates. Each of the heat transfer fins 21a is formed with a plurality of flat tube insertion notches 21aa extending in the vertical direction. The heat transfer fins 21a are attached so as to have countless portions protruding toward the upstream side of the air flow.

  The flat multi-hole tube 21b has upper and lower flat portions serving as heat transfer surfaces and a plurality of internal flow paths 21ba through which the refrigerant flows. The flat multi-hole tubes 21b that are slightly thicker than the upper and lower widths of the cutouts 21aa are arranged in a plurality of stages at intervals with the plane portion facing up and down, and are temporarily fixed in a state of being fitted into the cutouts 21aa. The Thus, the heat transfer fin 21a and the flat multi-hole tube 21b are brazed in a temporarily fixed state in which the flat multi-hole tube 21b is fitted in the notch 21aa of the heat transfer fin 21a. Further, both ends of each flat multi-hole tube 21b are fitted into the header collecting tubes 22 and 23 and brazed. Therefore, the internal spaces 22a and 22b of the header collecting pipe 22 and the internal spaces 23a, 23b, 23c, 23d and 23e of the header collecting pipe 23 and the internal flow path 21ba of the flat multi-hole pipe 21b are connected.

  As shown in FIG. 7, since the heat transfer fins 21a are connected to each other in the vertical direction, the condensation generated in the heat transfer fins 21a and the flat multi-hole tubes 21b drops down along the heat transfer fins 21a. The liquid is discharged to the outside through a path formed in the bottom plate 12.

(4-3) Configuration of Header Collecting Pipe Hereinafter, the configuration around the end portion of the header collecting pipes 22 and 23 will be mainly described. However, the configuration of this end portion is not different in the header collecting pipes 22 and 23. The header collecting pipe 22 will be described as a representative, and the description of the header collecting pipe 23 will be omitted.

  The header collecting pipe 22 has a header collecting pipe main body 50, a baffle 60 as a lid member, and a baffle 60 as a partition plate.

(4-3-1) Header Collecting Pipe Body FIG. 9 is an external perspective view showing the vicinity of the upper end portion of the header collecting pipe body 50. In FIG. 10, the side view seen from the side where the flat multi-hole pipe of the header collecting pipe main body is connected is shown. FIG. 11 shows a side view of the header collecting pipe body as viewed from the front.

  The header collecting pipe main body 50 is a substantially cylindrical member, and upper and lower end portions thereof are opened.

  A brazing material 51 is applied to the outer peripheral surface 51 a on the radially outer side of the header collecting pipe body 50. The type of the brazing material 51 is not particularly limited. For example, an aluminum brazing material is preferable as the brazing material including a common material together with the material of the header collecting pipe body 50 and the material of the baffle 60. From the viewpoint of material cost, it is preferable that the brazing material is not applied to the inner peripheral surface 51b on the radially inner side of the header collecting pipe body 50 and the upper and lower end surfaces.

  The header collecting pipe body 50 is formed with a plurality of flat tube insertion openings 59, a plurality of baffle insertion openings 56, a plurality of baffle tip openings 54, and an opening 55.

  The flat tube insertion opening 59 is an opening for inserting one end of the flat multi-hole tube 21 b, and is opened in the radial direction at a portion other than the end portion of the header collecting pipe main body 50. A plurality of flat tube insertion openings 59 are provided so as to be arranged in the vertical direction, which is the longitudinal direction of the header collecting pipe body 50. The flat tube insertion opening 59 is formed such that an arc portion corresponding to an angle of 90 to 120 degrees in the axis of the header collecting pipe body 50 is removed.

  The baffle insertion opening 56 is an opening for inserting a baffle 60 as a partition plate, which will be described later. The baffle insertion opening 56 is a portion other than the end of the header collecting pipe body 50 and has a diameter on the side opposite to the flat tube insertion opening 59. Open in the direction. A plurality of the baffle insertion openings 56 are provided so as to be aligned in the vertical direction, which is the longitudinal direction of the header collecting pipe body 50. The baffle insertion opening 56 is formed such that an arc portion corresponding to an angle of about 160 to 200 degrees in the axis of the header collecting pipe body 50 is removed. The baffle insertion opening 56 has a thick upper surface 56d, a thick lower surface 56e, and a thick contact surface 56b in the radially thick portion of the header collecting pipe body 50. The thick contact surface 56b is a surface that expands in the radial direction and the vertical direction of the header collecting pipe body 50, and includes a first insertion direction surface 64b and a baffle 60 in a first locked portion 64 of the baffle 60 described later. The second locked portion 65 is brought into surface contact with the second insertion direction surface 65b and locked.

  The baffle tip opening 54 is an opening formed on the opposite side to the main opening direction of the baffle insertion opening 56, that is, on the same side as the flat tube insertion opening 59, and is opened so as to be circular in a radial direction. doing. The baffle tip opening 54 has a cylindrical inner surface 54 b with the radial direction of the header collecting pipe body 50 as the axial direction at the radial thick portion of the header collecting pipe body 50. The baffle tip opening 54 is formed at the same height as the baffle insertion opening 56 in the header collecting pipe body 50.

  The header collecting pipe body 50 is provided with a pipe end portion 53 for attaching a baffle 60 as a lid member to be described later at the end.

  The pipe end portion 53 is a portion in which an arc portion corresponding to an angle of about 160 to 250 degrees in the axial center of the header collecting pipe main body 50 is further extended in the longitudinal direction of the header collecting pipe main body 50. The pipe end portion 53 may be formed by extending any one of the arc portions of the header collecting pipe body 50. For example, a flat tube is inserted in the arc portion of the header collecting pipe body 50 as in the present embodiment. The longitudinal end on the opening 59 side may be extended in the longitudinal direction, or the longitudinal end on the baffle insertion opening 56 side may be extended in the longitudinal direction. The pipe end portion 53 has a drain groove 52 and a locking portion 70.

  The drainage groove 52 has a shape in which a part of the upper end surface 53a of the pipe end portion 53 is cut away from the longitudinal end of the header collecting pipe body 50 toward the side opposite to the longitudinal end. ing. The depth of the drainage groove 52 (the position of the lower end portion 52 a) is such that the pipe end portion 53 and the upper end surface 51 c of the portion other than the drainage groove 52 of the header collecting pipe body 50 and the length of the header collecting pipe body 50 are long. It is formed to be the same height position in the direction. As a result, the water present on the upper surface of the baffle 60 and surrounded by the pipe end portion 53 is drained with the drain groove 52 directed radially outward.

  The locking portion 70 includes a first locking portion 71 extending at a top end portion of the pipe end portion 53 so as to be separated along a circumferential direction on one side from a portion where the drainage groove 52 is formed, And a second locking portion 72 extending away from the portion where the drainage groove 52 is formed along the circumferential direction of the other side. The vertical width of the locking portion 70 is configured to be as short as the width of the baffle 60 in the plate thickness direction.

  The first locking portion 71 includes an upper surface 71a constituting the same surface as the upper end surface 53a of the tube end portion 53, a lower surface 71c facing downward, and a circumferential surface 71b facing the circumferential direction. Have. The lower surface 71 c of the first locking portion 71 is located above the upper end surface 51 c of the header collecting pipe body 50 and below the upper surface 71 a of the first locking portion 71. The circumferential surface 71 b of the first locking portion 71 is configured such that the surface facing the circumferential direction extends from the upper end surface 51 c of the header collecting pipe body 50 to the upper surface 71 a of the first locking portion 71. The circumferential surface 71b of the first locking portion 71 is a surface facing the circumferential direction of the pipe end portion 53 below the first locking portion 71 (the first locking portion is more than the second locking portion 72). The circumferential end surface 53b of the pipe end portion 53 is further away from the circumferential surface 53b, which is the surface closer to the portion 71). In this way, the lower surface 71c of the first locking portion 71 and the upper end surface 51c of the header collecting pipe body 50 are a distance slightly larger than the width in the plate thickness direction of the baffle 60 described later (the baffle insertion opening). A distance equal to the vertical width of 56) is secured.

  The 2nd latching | locking part 72 is also the same shape as the 1st latching | locking part 71, Comprising: The 1st latching | locking part 71 is provided so that it may become an axis | shaft object. That is, the second locking portion 72 includes an upper surface 72a that forms the same surface as the upper end surface 53a of the pipe end portion 53, a lower surface 72c that faces downward, and a circumferential surface 72b that faces the circumferential direction. ,have. The lower surface 72 c of the second locking portion 72 is located above the upper end surface 51 c of the header collecting pipe body 50 and below the upper surface 72 a of the second locking portion 72. The circumferential surface 72b of the second locking portion 72 is configured such that the surface facing the circumferential direction is continuous in the vertical direction from the upper end surface 51c of the header collecting pipe body 50 to the upper surface 72a of the second locking portion 72. Yes. The circumferential surface 72b of the second locking portion 72 is a surface facing the circumferential direction of the pipe end portion 53 below the second locking portion 72 (the second locking portion is more than the first locking portion 71). It is further provided away from the circumferential surface 53c which is the surface closer to the portion 72) in the direction in which the circumferential surface 53c of the tube end portion 53 is directed. In this way, the lower surface 72c of the second locking portion 72 is a distance slightly larger than the width in the plate thickness direction of the baffle 60 (described later) (baffle insertion opening) between the lower surface 72c of the header collecting pipe body 50 and the upper end surface 51c. A distance equal to the vertical width of 56) is secured.

(4-3-2) Baffle FIG. 12 shows an external perspective view of the baffle 60. FIG. 13 shows a schematic plan view of the baffle 60. FIG. 14 is a schematic side view of the baffle 60 when viewed from the left side in FIG.

  The baffle 60 is used as a partition plate and a lid member. In the present embodiment, the baffle 60 as the partition plate and the baffle 60 as the lid member all have the same shape, size, and material, and are manufactured as the same part. Since the shape and the like are made common in this way, the manufacturing cost can be suppressed by reducing the types of components.

  The baffle 60 includes a baffle body 61, a convex portion 63, a first locked portion 64, and a second locked portion 65. The baffle 60 is used to divide the flow path by being inserted into the baffle tip opening 54 of the header collecting pipe body 50 with the side on which the convex portion 63 is provided as the insertion side. It can also be used as a member for closing the end.

  The baffle body 61 is a substantially plate-like substantially circular member made of aluminum or an aluminum alloy, and is preferably made of the same material as that of the header collecting pipe body 50 in order to maintain a good brazed state. The baffle body 61 has a semicircular part that is approximately the same as the outer shape of the header collecting pipe body 50 and a semicircular part that is approximately the same as the inner diameter of the header collecting pipe body 50. The semicircular portion having the same diameter as the outer diameter of the header collecting pipe main body 50 is attached to the header collecting pipe main body 50 and is located along the outer peripheral face 51a of the header collecting pipe main body 50 in the anti-insertion direction outer peripheral face 61a. have. A semicircular portion of the same size as the inner diameter of the header collecting pipe main body 50 is attached to the header collecting pipe main body 50 and is located on the outer periphery in the first insertion direction so as to face the inner peripheral surface 51b of the header collecting pipe main body 50. It has the surface 61b and the 2nd insertion direction outer peripheral surface 61c. The baffle body 61 has a substantially circular first surface 61d and a substantially circular second surface 61e facing the opposite side of the first surface 61d.

  The convex portion 63 has a shape protruding in the radial direction from between the first insertion direction outer peripheral surface 61 b and the second insertion direction outer peripheral surface 61 c of the baffle main body 61 in the circumferential portion of the baffle main body 61. The convex part 63 has the front end surface 63a facing the protruding direction at the front end. The first surface 61d of the baffle body 61 extends above the convex portion 63, and the lower surface of the convex portion 63 includes a portion on the same plane as the second surface 61e of the baffle main body 61. ing. The circumferential width of the convex portion 63 is approximately the same as the plate thickness of the baffle body 61. The convex portion 63 has a tip surface 63 a that forms the outside of the baffle 60, and a first convex portion side surface 63 b and a second convex portion side surface 63 c that form the circumferential side surface of the convex portion 63. The 1st convex part side surface 63b is connected with the 1st insertion direction outer peripheral surface 61b. The 2nd convex part side surface 63c is connected with the 2nd insertion direction outer peripheral surface 61c. The front end surface 63a of the convex portion 63 includes a boundary portion with the first convex portion side surface 63b, a boundary portion with the second convex portion side surface 63c, a boundary portion with the first surface 61d of the baffle body 61, and the baffle body 61. The boundary portion with the second surface 61e is processed so as to have a rounded shape. Thus, since the convex part 63 is processed into the rounded shape, at the time of inserting into the opening 54 for the baffle tip of the header collecting pipe main body 50, it becomes difficult to generate | occur | produce and enables smooth insertion. ing.

  The first locked portion 64 is a radially outer end of a semicircular portion of the baffle body 61 that is approximately the same as the outer shape of the header collecting pipe body 50, and is approximately the same as the inner diameter of the header collecting pipe body 50. It is provided so that it may be located in one of the boundary parts with a semicircle part, and the 2nd to-be-latched part 65 is provided so that it may be located in the other of the said boundary part. The first locked portion 64 is formed so that the surface on the second surface 61e side of the baffle 60 is warped upward toward the second surface 61e side of the baffle 60 as it goes from the insertion direction to the anti-insertion direction. It has a locked surface 64a. The first locked portion 64 is formed so that the surface on the first surface 61d side of the baffle 60 is warped upward toward the second surface 61e side of the baffle 60 from the insertion direction toward the anti-insertion direction. 1 It has the upper locked surface 64c. The first locked portion 64 has a first insertion direction surface 64b that connects the first lower locked surface 64a and the first upper locked surface 64c in the plate thickness direction and faces the insertion direction. .

  The second locked portion 65 is the same as the first locked portion 64, and has the shape of the first locked portion 64 and the axial object. That is, the second locked portion 65 is formed so that the surface on the second surface 61e side of the baffle 60 is warped upward toward the second surface 61e side of the baffle 60 from the insertion direction toward the anti-insertion direction. 2 It has a lower locked surface 65a. Further, the second locked portion 65 is a second upper cover formed so that the surface on the first surface 61d side of the baffle 60 is warped upward toward the second surface 61e as it goes from the insertion direction to the anti-insertion direction. It has a locking surface 65c. The second locked portion 65 has a second insertion direction surface 65b that connects the second lower locked surface 65a and the second upper locked surface 65c in the plate thickness direction and faces the insertion direction. .

(4-4) Fitting closed state by baffle in vicinity of end of header collecting pipe main body FIG. 15 is a schematic side view showing a state where the baffle 60 is inserted until immediately before plastic deformation. FIG. 16 is a schematic side view showing a state where the insertion is completed with the baffle 60 being plastically deformed. FIG. 17 is an external perspective view showing a state of the insertion destination side in a state where a baffle 60 as a partition plate is inserted and fixed to the header collecting pipe body 50. FIG. 18 is an external perspective view showing a state opposite to the insertion destination in a state where a baffle 60 as a partition plate is inserted and fixed in the header collecting pipe main body 50. In FIGS. 17 and 18, the baffle 60 is hatched so as to be distinguished from the header collecting pipe body 50 for easy understanding.

  The baffle 60 as a partition plate is inserted through the baffle insertion opening 56 of the header collecting pipe body 50 so that the convex portion 63 is at the leading end in the insertion direction, and the first lower locked surface 64a and the second lower locked surface. It is inserted until the state immediately before the plastic deformation occurs in the locked surface 65a (refer to the contact portion P between the baffle 60 and the header collecting pipe body 50 in FIG. 15). Further, the baffle 60 as the partition plate is further inserted, and the first lower locked surface 64a and the second lower locked surface 65a are elastically directed toward the surface of the baffle 60 on the first surface 61d side. The deformed state (see the contact portion P ′ between the baffle 60 and the header collecting pipe body 50 in FIG. 16) is inserted to the back of the baffle insertion opening 56, and the first insertion direction outer peripheral surface 61b of the convex portion 63 and The second insertion direction outer peripheral surface 61c is in surface contact with the radially inner inner peripheral surface 51b of the header collecting pipe body 50 in the radial direction, and at the same time, the first insertion direction surface 64b of the first locked portion 64 of the baffle 60 and the first insertion direction surface 64b. 2 When the thick contact surface 56b comes into surface contact with the second insertion direction surface 65b of the locked portion 65 (see the contact portion Q in FIG. 16), the insertion is completed and a temporary fixing state is obtained. .

  When the baffle 60 as the partition plate is inserted into the baffle insertion opening 56 of the header collecting pipe body 50, the first locked portion 64 and the second locked portion 65 of the baffle 60 are inserted into the baffle. When the outer peripheral portion of the opening 56 is reached, it is sandwiched between the upper and lower surfaces of the baffle insertion opening 56 from above and below, and is locked before it is fully inserted (baffle). The first locked portion 64, the second locked portion 65, and / or the thick upper surface 56d and the thick lower surface 56e of the baffle insertion opening 56 of the header collecting pipe body 50 exert forces. Thus, it will be in a state of plastic deformation while leaving the residual stress.) Even in this state, the baffle 60 is stably fixed, but by further pushing the baffle 60 into the back of the baffle insertion opening 56, the first insertion direction outer peripheral surface 61 b and the second insertion direction outer peripheral surface of the convex portion 63. 61c is in surface contact with the inner circumferential surface 51b on the radially inner side of the header collecting pipe body 50 in the radial direction, and at the same time, the first insertion direction surface 64b of the first locked portion 64 of the baffle 60 is in contact with the header collecting pipe body 50. Surface contact is made with the thick contact surface 56b. By inserting the baffle 60 until such a surface contact state is achieved, the convex portion 63 of the baffle 60 is moved from the vertical direction and the circumferential direction by the cylindrical inner surface 54b of the baffle tip opening 54 of the header collecting pipe body 50. Located in a covered place. The first convex side surface 63b, the second convex side surface 63c, the first surface 61d, the second surface 61e, and their boundary portions of the convex portion 63 of the baffle 60 are for the baffle tip of the header collecting pipe body 50. The state comes into contact with the surface of the cylindrical inner surface 54b of the opening 54, and the baffle 60 is supported by the header collecting pipe body 50 at both the non-insertion side end and the insertion side tip. For this reason, compared with a structure (backlash structure) that is supported only by either the non-insertion-side end or the insertion-side tip, it should be less likely to drop off and be stably held. Is done. The front end surface 63 a of the convex portion 63 is located on the substantially same plane as the outer peripheral surface 51 a on the radially outer side of the header collecting pipe body 50. Note that the tip surface 63a of the convex portion 63 may have a dimensional shape that is positioned on the radially outer side of the outer peripheral surface 51a on the radially outer side of the header collecting pipe body 50, or the inner surface of the baffle tip opening 54. The dimension shape located between the thickness width of the header collecting pipe main body 50 may be sufficient. In the case of adopting a dimensional shape located on the outer side in the radial direction, the brazing material 51 provided on the outer peripheral surface of the header collecting pipe main body 50 is drawn into the joint portion between the baffle tip opening 54 and the convex portion 63. Cheap.

  Further, the vicinity of the outer peripheral surface opposite to the insertion direction of the baffle 60 is sandwiched from above and below by the thick upper surface 56d and the thick lower surface 56e of the baffle insertion opening 56 of the header collecting pipe body 50. The counter-insertion direction outer peripheral surface 61a of the baffle 60 is located on substantially the same plane as the outer peripheral surface 51a of the header collecting pipe body 50 in the radial direction.

  As described above, the header collecting pipe body 50 in which the baffle 60 is temporarily fixed is brazed in the furnace by being placed in the furnace.

  Here, even if there is an impact during transportation until the header collecting pipe body 50 in which the baffle 60 is temporarily fixed is moved into the furnace, the baffle 60 is prevented from falling out of the temporary fixed state. It is possible. Such a temporarily fixed state can be achieved simply by providing the first locked portion 64 and the second locked portion 65 on the baffle 60. The baffle 60 has a shape and size accuracy of the baffle insertion opening 56. Therefore, the manufacturing cost can be reduced.

  In addition, as described above, the convex portion 63 of the baffle 60 calls the brazing material 51 provided on the outer peripheral surface of the header collecting pipe body 50 into the joint portion between the baffle tip opening 54 and the convex portion 63. it can. And as for the drawing-in direction, the brazing material 51 can be drawn from various directions including the upper, lower and circumferential directions with respect to the tip surface 63a of the convex portion 63 in the outer peripheral surface 51a of the header collecting pipe body 50. . For this reason, the path length for drawing the brazing material 51 to the vicinity of the front end in the insertion direction of the baffle 60 can be shortened compared to the mode in which the convex portion 63 and the baffle front end opening 54 are not provided. Sufficient brazing material 51 can be drawn into the joint near the tip in the insertion direction, and the brazing strength can be increased. Further, in a mode in which the convex portion 63 and the baffle tip opening 54 are not provided, it is difficult to visually recognize from the outer periphery of the header collecting pipe body 50. It is possible to easily visually recognize from the outer periphery of the header collecting pipe body 50 whether or not a fillet made of the brazing material 51 is formed in the vicinity of the joining portion. Further, the brazing material 51 in the peripheral portion of the header collecting pipe main body 50 can be easily drawn into the joint portion between the outer circumferential surface 61 a in the anti-insertion direction of the baffle 60 and the outer peripheral surface 51 a of the header collecting pipe main body 50.

  It should be noted that the baffle 60 can also be temporarily set in a similar manner when it is inserted into the baffle insertion opening 56 in a posture reverse to the posture described above.

(4-5) Closed engagement state by baffle as a lid member in the vicinity of the end of the header collecting pipe main body FIG. 19 shows a state in which the vicinity of the end of the header collecting pipe main body 50 is closed by the baffle 60 as the lid member. The external appearance perspective view which shows is shown. FIG. 20 shows a side sectional view in the same state. In FIG. 19 and FIG. 20, the baffle 60 is hatched to distinguish it from the header collecting pipe body 50 for easy understanding.

  The baffle 60 as a lid member is inserted in a horizontal direction between the upper end surface 51c of the header collecting pipe body 50 and the lower surfaces 71c and 72c of the locking portion 70 so that the convex portion 63 becomes the front end in the insertion direction. By this, it will be in a temporarily fixed state.

  When the baffle 60 as the lid member is inserted between the upper end surface 51c of the header collecting pipe body 50 and the lower surfaces 71c and 72c of the locking portion 70, the first locked portion 64 and the first locked portion 64 of the baffle 60 are arranged. 2 When the locked portion 65 reaches the locking portion 70, it is completely in the state where it is sandwiched from above and below by the upper end surface 51c of the header collecting pipe body 50 and the lower surfaces 71c and 72c of the locking portion 70. It is in a locked state before it is inserted (the first locked portion 64, the second locked portion 65 of the baffle 60, and / or the upper end surface 51c of the header collecting pipe body 50 and the engagement). The lower surfaces 71c and 72c of the stop portion 70 are in a state of being plastically deformed while leaving the residual stress by applying force. Even in this state, the baffle 60 is stably fixed. However, when the baffle 60 is further pushed inward, the first insertion direction outer peripheral surface 61b and the second insertion direction outer peripheral surface 61c of the baffle 60 become the header collecting pipe main body. The first insertion direction surface 64 b of the first locked portion 64 of the baffle 60 is in surface contact with the circumferential surface 53 b of the pipe end portion 53 simultaneously with the surface contact in the radial direction with the inner peripheral surface 51 b on the radially inner side of 50. By inserting the baffle 60 until such a surface contact state is achieved, the convex portion 63 of the baffle 60 is positioned above the lower end portion 52 a of the drainage groove 52 provided in the pipe end portion 53. Here, the lower part of the convex part 63 of the baffle 60 may be supported by the upper surface of the lower end part 52a of the drainage groove 52 of the pipe end part 53, and in that case, the baffle 60 has an end part on the non-insertion side. At both the insertion end and the insertion end, the header collecting pipe body 50 is supported. In this case, compared to a structure (backlash structure) supported only by either the non-insertion side end or the insertion side tip, it should be less likely to drop out and be stably held. Is done. The front end surface 63 a of the convex portion 63 is located on the substantially same plane as the outer peripheral surface 51 a on the radially outer side of the header collecting pipe body 50. The tip surface 63 a of the convex portion 63 may have a dimension shape that is located radially outside the outer peripheral surface 51 a on the radially outer side of the header collecting pipe body 50, or the upper surface of the lower end portion 52 a of the drainage groove 52. The dimension shape located between the thickness width of the pipe end part 53 may be sufficient. When the dimensional shape located on the outer side in the radial direction is adopted, the brazing material 51 provided on the outer peripheral surface of the header collecting pipe main body 50 can be easily drawn into the joint between the drainage groove 52 and the convex portion 63. .

  Further, the vicinity of the outer peripheral surface opposite to the insertion direction of the baffle 60 is supported from below by the upper end surface 51 c of the header collecting pipe body 50. The counter-insertion direction outer peripheral surface 61a of the baffle 60 is located on substantially the same plane as the outer peripheral surface 51a of the header collecting pipe body 50 in the radial direction.

  As described above, the header collecting pipe body 50 in which the baffle 60 as the lid member is temporarily fixed is brazed in the furnace by being placed in the furnace. Specifically, both the baffle 60 as the partition plate and the baffle 60 as the lid member are temporarily fixed, and then put into the furnace.

  The baffle 60 can also be prevented from falling out of the temporarily fixed state even if there is an impact during transportation until the baffle 60 is moved into the furnace after temporary fixing. Such a temporarily fixed state can be realized only by providing the first locked portion 64 and the second locked portion 65 on the baffle 60. The accuracy of the shape and dimensions of the baffle 60 is as follows. The manufacturing cost can be reduced because it is not required to the extent that it exactly conforms to the shape between the upper end surface 51c and the lower surfaces 71c and 72c of the locking portion 70.

  In addition, the convex portion 63 of the baffle 60 is provided on the outer peripheral surface of the header collecting pipe main body 50 at a portion where the baffle 60 as a lid member is brazed and fixed to the header collecting pipe main body 50 by the above configuration. The brazing material 51 can be drawn into the joint portion between the drainage groove 52 and the convex portion 63. The brazing of the baffle 60 in the vicinity of the convex portion 63 is not only the brazing material 51 provided on the lower portion of the front end surface 63a of the convex portion 63 in the outer peripheral surface 51a of the header collecting pipe body 50, but also the pipe end portion. The brazing material 51 provided in the circumferential position adjacent to the circumferential direction 53 and the brazing material 51 provided above can also be pulled in, so that sufficient brazing strength can be secured and reliability can be improved. Here, the brazing material 51 on the outer peripheral surface 51a of the header collecting pipe main body 50 is liquefied in the furnace and passes through the gap between the header collecting pipe main body 50 and the baffle 60 due to surface tension, so that the upper surface of the baffle 60 is increased. The fillet F formed at a position along the inner peripheral surface 51b of the header collecting pipe body 50 can be easily seen from above, and it is easy to ensure that the brazing material 51 is sufficiently drawn. It is possible to improve reliability.

  Furthermore, since the latching | locking part 70 of the pipe end part 53 is comprised integrally with the header collecting pipe main body 50, the movement which the baffle 60 as a cover member tends to remove | deviate can be suppressed. Further, even if the baffle 60 as the lid member is detached from the header collecting pipe main body 50 due to the brazing failure, the baffle 60 can be prevented from jumping out.

(5) Features of the outdoor heat exchanger 20 of the air conditioner 1 The outdoor heat exchanger 20 of the present embodiment is configured so that the top surface of the baffle 60 is in a state where the baffle 60 as a lid member is attached to the header collecting pipe body 50. The tube end portion 53 is located at least partially. For this reason, the joint portion between the baffle 60 and the header collecting pipe body 50 is not limited to the lower surface of the baffle as in the conventional example, and the joint portion can also be provided on the upper surface side. Thereby, the joining strength of the header collecting pipe main body 50 and the baffle 60 as a cover member can be improved.

  In addition, the pipe end portion 53 of the header collecting pipe body 50 does not cover the entire upper surface on the radially outer side of the baffle 60 as a lid member, but covers at least a part of the inside of the header collecting pipe body 50. A drainage groove 52 that connects the peripheral surface 51b and the outer peripheral surface 51a in the radial direction is formed. For this reason, even if dew condensation water or rainwater exists inside the tube end portion 53 and on the upper surface side of the baffle 60 as a lid member, it can be discharged immediately. For this reason, corrosion of the metal header collecting pipe main body 50 and the baffle 60 as the lid member can be suppressed. Moreover, the ice-up by the said water freezing can be suppressed.

  In particular, when the outdoor heat exchanger 20 employing the drainage groove 52 functions as a refrigerant evaporator in a refrigeration cycle, condensed water is likely to be generated. It is possible to drain water efficiently.

(6) Modification In the above embodiment, an example of the embodiment of the present invention has been described. However, the above embodiment is not intended to limit the present invention, and is not limited to the above embodiment. The present invention naturally includes aspects appropriately modified without departing from the spirit of the present invention.

(6-1) Modification A
In the header collecting pipe main body 50 of the outdoor heat exchanger 20 of the above-described embodiment, an example in which the locking portion 70 has the first locking portion 71 and the second locking portion 72 that are separated from each other will be described. did.

  However, the present invention is not limited to this. For example, like the header collecting pipe body 250 provided with the locking portion 270 shown in FIG. The stop 72 may be extended in the circumferential direction and connected. The engaging portion 270 may be provided with a drain port 72x penetrating in the radial direction so as to connect the inner peripheral surface 51b and the outer peripheral surface 51a.

  Further, only the drain port 72x may be formed instead of the drain groove 52 of the above embodiment.

  Even in these cases, it is possible to ensure water drainage in the space above the baffle 60 as the lid member and inside the pipe end portion 53.

(6-2) Modification B
In the above embodiment, the lower end portion 52 a of the drainage groove 52 and the upper end surface 51 c of the portion other than the pipe end portion 53 of the header collecting pipe body 50 are at the same height position in the longitudinal direction of the header collecting pipe body 50. The case has been described as an example.

  However, the present invention is not limited to this. For example, as shown in FIG. 22, a baffle 360 as a lid member that does not have a shape corresponding to the convex portion 63 of the above embodiment, and a lid member as The drainage structure may be configured using the header collecting pipe main body 350 including the pipe end portion 353 having the drainage groove 352 that is lost above a part of the radially outer end of the baffle 360. Even in this case, sufficient drainage can be ensured.

1 Air conditioning equipment (refrigeration equipment)
2 Air conditioning outdoor unit 3 Air conditioning indoor unit 10 Unit casing 20 Outdoor heat exchanger (heat exchanger)
21 Heat Exchanger 21a Heat Transfer Fin (Fin)
21b Flat multi-hole tube (flat tube)
22, 23 Header collecting pipe 31 Gas refrigerant pipe 32 Liquid refrigerant pipe 40 Expansion valve 50 Header collecting pipe body 52 Drain groove (drain section, groove)
52a Lower end portion 53 Pipe end portion 60 Baffle (lid member)

JP 2010-112580 A

Claims (5)

A plurality of flat tubes (21b);
A header collecting pipe (22, 23) to which each flat pipe is connected;
A plurality of fins (21a) joined to the flat tube,
A heat exchanger (20) in which a fluid flowing inside the flat tube exchanges heat with air flowing outside the flat tube,
The header collecting pipes (22, 23)
A header collecting pipe body (50) provided such that the longitudinal direction is the vertical direction;
A lid member (60) provided on the inner side of the upper end of the header collecting pipe body (50) and closing the upper side of the header collecting pipe body (50);
With
The header collecting pipe body (50) has a pipe end portion (53) extending upward from the lid member (60),
A drainage part is formed in a part of the pipe end part (53) ,
The drainage part is a groove formed such that a part of the pipe end part (53) is recessed downward.
Heat exchanger (50). The lower end (52a) of the drainage groove (52) is located below the upper end of the lid member (60).
The heat exchanger according to claim 1 .   A plurality of flat tubes (21b);
  A header collecting pipe (22, 23) to which each flat pipe is connected;
  A plurality of fins (21a) joined to the flat tube,
  A heat exchanger (20) in which a fluid flowing inside the flat tube exchanges heat with air flowing outside the flat tube,
  The header collecting pipes (22, 23)
    A header collecting pipe body (50) provided such that the longitudinal direction is the vertical direction;
    A lid member (60) provided on the inner side of the upper end of the header collecting pipe body (50) and closing the upper side of the header collecting pipe body (50);
With
  The header collecting pipe body (50) has a pipe end portion (53) extending upward from the lid member (60),
  A drainage part is formed in a part of the pipe end part (53),
  The drainage part of the pipe end part (53) is missing a part of the radially outer end part of the lid member (60).
Heat exchanger (50). Wherein at least a portion of the outer peripheral portion of the lid member is sandwiched from above and below between a portion and said tube end portion other than the tube end portion (53) of the header manifold,
The heat exchanger according to any one of claims 1 to 3. The compressor, the first heat exchanger, the expansion valve, and the second heat exchanger that is the heat exchanger according to any one of claims 1 to 4, are configured to be connected to each other, and A refrigerant circuit capable of causing the second heat exchanger to function as at least a refrigerant evaporator;
Refrigeration equipment (1).

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