JP2014059098A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner in which a parallel flow type heat exchanger can be firmly fixed to a casing of the air conditioner without concern for electric corrosion.SOLUTION: An air conditioner 1 includes an outdoor unit 10 and an indoor unit 30. A parallel flow type heat exchanger 50 of a side flow type which includes two lines of vertical direction header pipes 51 and 52, a plurality of horizontal direction flat tubes 53 which connect the header pipes 51 and 52, and a corrugate fin 55 attached to a flat surface of the flat tubes 53 is mounted on the outdoor unit 30. The heat exchanger 50 is fixed to a casing 11 of the outdoor unit 10 via fixing members 61, 62, 63 and 64 which are fixed to at least one of the header pipes 51 and 52. The fixing members are made of a material causing no electric corrosion to the heat exchanger 50 and are formed as halved components between which a header pipe is held, and are fixed to the header pipe by a fastening element passing through the flat tubes 53.

Description

  The present invention relates to an air conditioner equipped with a parallel flow heat exchanger.

  A parallel flow type heat in which a plurality of flat tubes are arranged between a plurality of header pipes so that a plurality of refrigerant passages in the flat tubes communicate with the inside of the header pipe, and fins such as corrugated fins are arranged between the flat tubes. Exchangers are widely used in car air conditioners and outdoor air conditioners for buildings.

  Patent Document 1 describes a side flow type parallel flow heat exchanger including two vertical header pipes and a plurality of horizontal flat tubes connecting the two header pipes. Corrugated fins are disposed between the flat tubes of the heat exchanger.

  Parallel flow heat exchangers are often made of aluminum or an aluminum alloy. When a parallel flow heat exchanger made of aluminum or an aluminum alloy is mounted on an air conditioner, especially when mounted on an outdoor unit, when the housing is made of steel, it is electrically inferior to iron. How to protect a certain aluminum or aluminum alloy from electrolytic corrosion is a big problem.

  A solution to the above problem is disclosed in Patent Document 2. In the outdoor unit of an air conditioner described in Patent Document 2, a spacer made of a metal that is electrically lower than aluminum is disposed between the bottom plate and the heat exchanger.

JP 2010-249388 A Japanese Patent No. 4479207

  In the case of the outdoor unit of an air conditioner described in Patent Document 2, it is a matter of course that the bottom plate and the spacer must be firmly fixed, but the spacer and the heat exchanger must also be firmly fixed. Otherwise, it cannot withstand vibrations and shocks during transportation and installation, and the heat exchanger moves in the housing. At this time, if the heat exchanger comes into contact with a fastening element for fixing the spacer and the heat exchanger, for example, a screw, electric corrosion may occur between the fastening element and the heat exchanger, and the fixing may become unstable. obtain. Electric corrosion can open holes in the heat exchanger and lead to leakage of refrigerant.

  The present invention has been made in view of the above points, and it is an object of the present invention to enable a parallel flow heat exchanger to be firmly fixed to a casing of an air conditioner without fear of electrolytic corrosion.

  An air conditioner according to the present invention includes two header pipes arranged in parallel at a distance from each other and a plurality of refrigerant pipes arranged between the two header pipes, and an internal refrigerant passage provided inside the header pipe. And an air conditioner equipped with a parallel flow type heat exchanger having a plurality of fins attached to the flat surfaces of the plurality of flat tubes, the parallel flow type heat exchanger includes the two It is fixed to the casing of the air conditioner via a fixing member fixed to at least one of the header pipes, and the fixing member does not cause electrolytic corrosion in the parallel flow heat exchanger Depending on the material, it is formed as a split part that sandwiches the header pipe, and is fixed to the header pipe by a fastening element that passes between the flat tubes. It is characterized.

  According to the above configuration, the parallel flow heat exchanger is fixed to the casing of the air conditioner via the fixing member formed of a material that does not generate electrolytic corrosion. There is no need to worry about erosion and refrigerant leakage. There is no need to worry that the fixed relationship between the parallel flow heat exchanger and the fixing member is loosened by electrolytic corrosion. The fixing member is formed as a split part that sandwiches the header pipe, and is fixed to the header pipe by a fastening element that passes between the flat tubes, so that the fixing member is firmly fixed to the header pipe.

  In the air conditioner having the above configuration, it is preferable that a space for allowing the fastening element to pass between the flat tubes is formed in a part of the fin.

  According to this configuration, a fastening element having a large cross-sectional area can be used, and the fixing member can be more firmly fixed to the header pipe.

  In the air conditioner having the above configuration, the fin is a corrugated fin, and the space is preferably formed by compressing the corrugated fin in the length direction of the flat tube.

  According to this configuration, it is possible to easily form a space for the fastening element to pass between the flat tubes, taking advantage of the characteristic of the corrugated fins that it is easy to compress and stretch.

  In the air conditioner configured as described above, it is preferable that the fastening element is a screw that passes through one part of the split part and is screwed into the other part without contacting the parallel flow heat exchanger.

  According to this configuration, the fixing member can be firmly fixed to the header pipe. In addition, there is no concern that the screw will cause electric corrosion in the parallel flow heat exchanger.

  In the air conditioner configured as described above, it is preferable that the fastening element is a hook that is formed on one part of the split part and engages with the other part without contacting the parallel flow heat exchanger.

  According to this configuration, the fixing member can be easily fixed to the header pipe without a tool. In addition, there is no concern that hooks cause electric corrosion in the parallel flow heat exchanger.

  In the air conditioner configured as described above, it is preferable that a synthetic resin is selected as a material for the fixing member.

  According to this configuration, the fixing member can be easily formed by using a technique such as injection molding.

  According to the present invention, the parallel flow type heat exchanger is fixed to the casing of the air conditioner via the fixing member formed of a material that does not generate electrolytic corrosion. There is no need to worry about leakage of refrigerant due to erosion, and there is no need to worry about loosening of the fixing relationship between the parallel flow heat exchanger and the fixing member due to electrolytic corrosion. The fixing member is formed as a split part that sandwiches the header pipe, and is fixed to the header pipe by a fastening element that passes between the flat tubes, so that the fixing member is firmly fixed to the header pipe. Even if the fixing member tries to be displaced in the axial direction of the header pipe, such a movement is prevented by the fastening element being caught by the flat tube, so that the fixing member is detached from the parallel flow type heat exchanger. There is little risk of doing so.

It is a schematic block diagram of the air conditioner which concerns on embodiment of this invention, and shows the state at the time of air_conditionaing | cooling operation. It is a schematic block diagram of the air conditioner which concerns on embodiment of this invention, and shows the state at the time of heating operation. It is a horizontal sectional view showing a schematic structure of an outdoor unit of an air conditioner according to an embodiment of the present invention. It is a control block diagram of the air conditioner concerning the embodiment of the present invention. It is a schematic block diagram of a parallel flow type heat exchanger. It is sectional drawing along the VI-VI line of FIG. It is a perspective view of the parallel flow type heat exchanger which fixed the member for fixation to the header pipe. It is a front view of the parallel flow type heat exchanger which fixed the member for fixation to the header pipe. It is a perspective view which shows the condition which fixes the member for fixing to the header pipe of a parallel flow type heat exchanger. It is a top view of the parallel flow type heat exchanger which fixed the member for fixing to the header pipe, and a part is made into a section. It is an enlarged view of the cross-sectional location of FIG. It is a front view of the fixing member fixing location in a parallel flow type heat exchanger. It is a perspective view which shows the state which fixed the parallel flow type heat exchanger to the housing | casing of an air conditioner through the member for fixing. It is a perspective view which shows the condition which fixes the fixing member of another type to the other header pipe of a parallel flow type heat exchanger. It is an enlarged front view of the attachment location of the fixing member of the other type shown in FIG. FIG. 15 is a horizontal sectional view of another type of fixing member shown in FIG. 14 and a header pipe to which the fixing member is attached. It is a perspective view which shows the state which fixed the parallel flow type heat exchanger to the housing | casing of an air conditioner through the member for fixing.

  The air conditioner 1 according to the embodiment of the present invention will be described based on FIGS. 1 to 6. In the air conditioner 1, a side flow parallel flow type heat exchanger is used as a heat exchanger for an outdoor unit.

  The basic structure of a side flow parallel flow heat exchanger is shown in FIG. In FIG. 5, the upper side of the paper is the upper side of the heat exchanger, and the lower side of the paper is the lower side of the heat exchanger. The parallel flow heat exchanger 50 includes two vertical header pipes 51 and 52 and a plurality of horizontal flat tubes 53 disposed therebetween. The header pipes 51 and 52 are arranged in parallel at intervals in the horizontal direction, and the flat tubes 53 are arranged at a predetermined pitch in the vertical direction. Since the heat exchanger 50 is installed at various angles according to design requirements at the stage of actually mounting on equipment, the “vertical direction” and “horizontal direction” in this specification should not be interpreted strictly. It should be understood as a mere measure of direction.

  The flat tube 53 is an elongated molded product obtained by extruding a metal, and as shown in FIG. 6, a refrigerant passage 54 through which a refrigerant flows is formed. Since the flat tube 53 is arranged so that the extrusion molding direction, which is the longitudinal direction, is horizontal, the refrigerant flow direction of the refrigerant passage 54 is also horizontal. A plurality of refrigerant passages 54 having the same cross-sectional shape and cross-sectional area are arranged in the left-right direction in FIG. 6, and therefore, the vertical cross section of the flat tube 53 has a harmonica shape. Each refrigerant passage 54 communicates with the header pipes 51 and 52.

  Corrugated fins 55 are attached to the flat surface of the flat tube 53. Of the corrugated fins 55 arranged vertically, side plates 56 are arranged outside the uppermost and lowermost ones.

  The header pipes 51 and 52, the flat tubes 53, the corrugated fins 55, and the side plates 56 are all made of aluminum or an aluminum alloy. The flat tubes 53 are for the header pipes 51 and 52, and the corrugated fins 55 are for the flat tubes 53. The side plates 56 are fixed to the corrugated fins 55 by brazing or welding, respectively.

  The inside of the header pipe 51 is partitioned into two sections S1 and S2 by one partition portion P1. The partition part P1 divides the plurality of flat tubes 53 into a plurality of flat tube groups. A flat tube group consisting of 17 out of a total of 24 flat tubes 53 is connected to the section S1, and a flat tube group consisting of 7 flat tubes 53 is connected to the section S2.

  The inside of the header pipe 52 is partitioned into three sections S3, S4, and S5 by two partition portions P2 and P3. The partition parts P2 and P3 divide the plurality of flat tubes 53 into a plurality of flat tube groups. A flat tube group consisting of nine of the 24 flat tubes 53 in total is connected to the section S3, a flat tube group consisting of twelve flat tubes 53 is connected to the section S4, and three flat tubes groups are connected to the section S5. A flat tube group consisting of the flat tubes 53 is connected.

  The total number of the flat tubes 53 described above, the number of partition portions inside each header pipe and the number of partitions partitioned thereby, and the number of flat tubes 53 for each flat tube group divided by the partition portions are merely examples. Yes, it does not limit the invention.

  A refrigerant inlet / outlet pipe 57 is connected to the section S3. A refrigerant inlet / outlet pipe 58 is connected to the section S5.

  The function of the heat exchanger 50 is as follows. When the heat exchanger 50 is used as a condenser, the refrigerant is supplied to the compartment S3 through the refrigerant inlet / outlet pipe 57. The refrigerant that has entered the compartment S3 travels to the compartment S1 through the nine flat tubes 53 that connect the compartment S3 and the compartment S1. The flat tube group formed by the nine flat tubes 53 constitutes the refrigerant path A. The refrigerant path A is symbolized by a block arrow. Other refrigerant paths are also symbolized by block arrows.

  The refrigerant that has entered the section S1 is turned back there, and travels to the section S4 through the eight flat tubes 53 that connect the sections S1 and S4. The flat tube group formed by the eight flat tubes 53 constitutes the refrigerant path B.

  The refrigerant that has entered the section S4 is turned back and passes through the four flat tubes 53 that connect the sections S4 and S2 to the section S2. The flat tube group formed by the four flat tubes 53 constitutes the refrigerant path C.

  The refrigerant that has entered the compartment S2 turns back there, and travels through the three flat tubes 53 connecting the compartment S2 and the compartment S5 to the compartment S3. The flat tube group formed by the three flat tubes 53 constitutes the refrigerant path D. The refrigerant entering the compartment S5 flows out from the refrigerant inlet / outlet pipe 58.

  When the heat exchanger 50 is used as an evaporator, the refrigerant is supplied to the compartment S5 through the refrigerant inlet / outlet pipe 58. Subsequent refrigerant flows follow the refrigerant path when the heat exchanger 50 is used as a condenser. That is, the refrigerant enters the section S <b> 1 through the route of the refrigerant path D → refrigerant path C → refrigerant path B → refrigerant path A and flows out from the refrigerant inlet / outlet pipe 57.

  A schematic configuration of a separate air conditioner 1 using the heat exchanger 50 as a component of a heat pump cycle is shown in FIG. The air conditioner 1 includes an outdoor unit 10 and an indoor unit 30.

  The outdoor unit 10 houses a compressor 12, a switching valve 13, an outdoor heat exchanger 14, an expansion valve 15, an outdoor blower 16, and the like in a housing 11 made of sheet metal parts and synthetic resin parts. doing. The switching valve 13 is a four-way valve. A heat exchanger 50 is used as the outdoor heat exchanger 14. As the expansion valve 15, a valve whose opening degree can be controlled is used. The outdoor blower 16 is a combination of a propeller fan and a motor.

  The outdoor unit 10 is connected to the indoor unit 30 through two refrigerant pipes 17 and 18. The refrigerant pipe 17 is intended to flow a liquid refrigerant, and a pipe that is thinner than the refrigerant pipe 18 is used. Therefore, the refrigerant pipe 17 may be referred to as “liquid pipe”, “narrow pipe”, or the like. The refrigerant pipe 18 is intended to flow a gaseous refrigerant, and is thicker than the refrigerant pipe 17. Therefore, the refrigerant pipe 18 may be referred to as “gas pipe”, “thick pipe”, or the like. For example, HFC R410A or R32 is used as the refrigerant.

  In the refrigerant pipe inside the outdoor unit 10, a two-way valve 19 is provided in the refrigerant pipe connected to the refrigerant pipe 17, and a three-way valve 20 is provided in the refrigerant pipe connected to the refrigerant pipe 18. The two-way valve 19 and the three-way valve 20 are closed when the refrigerant pipes 17 and 18 are removed from the outdoor unit 10 to prevent the refrigerant from leaking from the outdoor unit 10 to the outside.

  FIG. 3 shows the structure of the outdoor unit 10 more substantively. The casing 11 of the outdoor unit 10 is made of sheet metal, and is drawn in a substantially rectangular shape in FIG. The casing 11 has a long side as a front surface 11F and a back surface 11B, and a short side as a left side surface 11L and a right side surface 11R. An exhaust port 11E is formed on the front surface 11F, a back surface intake port 11BS is formed on the back surface 11B, and a side surface intake port 11LS is formed on the left side surface 11L. The exhaust port 11E is composed of a set of a plurality of horizontal slit-shaped openings, and the back surface intake port 11BS and the side surface intake ports 11LS are composed of lattice-shaped openings. A top plate and a bottom plate (not shown in FIG. 3) are added to the four sheet metal members of the front surface 11F, the back surface 11B, the left side surface 11L, and the right side surface 11R to form the hexahedron-shaped casing 11.

  There is no limitation that one part constitutes each of the six surfaces of the housing 11. Some surfaces are composed of a single component, while others are composed of a plurality of components.

  Inside the housing 11, a planar L-shaped outdoor heat exchanger 14 is arranged immediately inside the rear intake port 11BS and the side intake port 11LS. In order to force heat exchange between the outdoor heat exchanger 14 and the outdoor air, an outdoor blower 16 is disposed between the outdoor heat exchanger 14 and the exhaust port 11E. The outdoor blower 16 includes a combination of a propeller fan 16a and a motor 16b. In order to improve the blowing efficiency, a bell mouth 11BM surrounding the propeller fan 16a is provided on the inner surface of the front surface 11F of the housing 11. The space inside the right side surface 11R of the casing 11 is isolated by a partition wall 11P from the air flow flowing from the rear intake port 11BS to the exhaust port 11E, and the compressor 12 is accommodated in this space.

  The indoor unit 30 houses an indoor heat exchanger 32, an indoor blower 33, and the like in a housing 31 formed of synthetic resin parts. The indoor heat exchanger 32 is a combination of three heat exchangers 32 </ b> A, 32 </ b> B, and 32 </ b> C like a roof that covers the indoor blower 33. Any or all of the heat exchangers 32 </ b> A, 32 </ b> B, and 32 </ b> C can be configured by the heat exchanger 50. The indoor blower 33 is a combination of a cross flow fan and a motor.

  In order to control the operation of the air conditioner 1, it is indispensable to know the temperature of each place. For this purpose, temperature detectors are arranged in the outdoor unit 10 and the indoor unit 30. In the outdoor unit 10, a temperature detector 21 is disposed in the outdoor heat exchanger 14, and a temperature detector 22 is disposed in the discharge pipe 12 a serving as the discharge unit of the compressor 12, and the suction serving as the suction unit of the compressor 12. A temperature detector 23 is disposed in the pipe 12 b, a temperature detector 24 is disposed in the refrigerant pipe between the expansion valve 15 and the two-way valve 19, and a temperature detector for measuring the outside air temperature at a predetermined location inside the housing 11. 25 is arranged. In the indoor unit 30, a temperature detector 34 is disposed in the indoor heat exchanger 32, and a temperature detector 35 for measuring room temperature is disposed in a predetermined location inside the housing 31. The Each of the temperature detectors 21, 22, 23, 24, 25, 34, and 35 is formed of a thermistor.

The control unit 40 shown in FIG. 4 controls the overall control of the air conditioner 1. The control unit 40 performs control so that the room temperature reaches a target value set by the user.

  The control unit 40 issues operation commands to the compressor 12, the switching valve 13, the expansion valve 15, the outdoor fan 16, and the indoor fan 33. The control unit 40 receives output signals of the detected temperatures from the temperature detectors 21 to 25 and the temperature detector 34. The controller 40 issues an operation command to the compressor 12, the outdoor fan 16, and the indoor fan 33 while referring to output signals from the temperature detectors 21 to 25 and the temperature detectors 34 and 35, and the switching valve 13. A command for switching the state is issued to the expansion valve 15.

  FIG. 1 shows a state in which the air conditioner 1 is performing a cooling operation or a defrosting operation. At this time, the compressor 12 circulates the refrigerant in a cooling mode, that is, a circulation mode in which the refrigerant discharged from the compressor 12 first enters the outdoor heat exchanger 14.

  The high-temperature and high-pressure refrigerant discharged from the compressor 12 enters the outdoor heat exchanger 14 where heat exchange with outdoor air is performed. The refrigerant dissipates heat to the outdoor air and condenses. The refrigerant that is condensed to become liquid enters the expansion valve 15 from the outdoor heat exchanger 14 and is decompressed there. The decompressed refrigerant is sent to the indoor heat exchanger 32, expands to a low temperature and low pressure, and lowers the surface temperature of the indoor heat exchanger 32. The indoor side heat exchanger 32 whose surface temperature has been lowered absorbs heat from the room air, thereby cooling the room air. After the heat absorption, the low-temperature gaseous refrigerant returns to the compressor 12. The air flow generated by the outdoor blower 16 promotes heat radiation from the outdoor heat exchanger 14, and the air flow generated by the indoor blower 33 promotes heat absorption of the indoor heat exchanger 32.

  FIG. 2 shows a state where the air conditioner 1 is performing a heating operation. At this time, the switching valve 13 is switched to reverse the refrigerant flow during the cooling operation. The compressor 12 circulates the refrigerant in a circulation mode during heating, that is, in a circulation mode in which the refrigerant discharged from the compressor 12 first enters the indoor heat exchanger 32.

  The high-temperature and high-pressure refrigerant discharged from the compressor 12 enters the indoor heat exchanger 32 where heat exchange with the indoor air is performed. The refrigerant dissipates heat to the room air, and the room air is warmed. The refrigerant that has dissipated heat and has become liquid by condensing enters the expansion valve 15 from the indoor heat exchanger 32 and is decompressed there. The decompressed refrigerant is sent to the outdoor heat exchanger 14 and expands to a low temperature and low pressure, thereby lowering the surface temperature of the outdoor heat exchanger 14. The outdoor heat exchanger 14 whose surface temperature has dropped absorbs heat from outdoor air. After the heat absorption, the low-temperature gaseous refrigerant returns to the compressor 12. The air flow generated by the outdoor blower 33 promotes heat dissipation from the indoor heat exchanger 33, and the air flow generated by the outdoor blower 16 promotes heat absorption by the outdoor heat exchanger 14.

  Next, a mechanism for fixing the parallel flow type heat exchanger 50 constituting the outdoor heat exchanger 14 to the casing 11 of the outdoor unit 10 will be described with reference to FIGS.

  In the header pipe 51 of the heat exchanger 50, a fixing member 61 is fixed at the upper end, and a fixing member 62 is fixed at the lower end. A fixing member 63 is fixed to the header pipe 52 at the upper end, and a fixing member 64 is fixed to the lower end. The heat exchanger 50 is fixed to the housing 11 via fixing members 61, 62, 63, 64.

  The fixing members 61, 62, 63, 64 are formed of a material that does not cause electrolytic corrosion in the heat exchanger 50. Here, a synthetic resin is used. Each of the fixing members 61 and 62 is formed by injection molding of a synthetic resin as a single part that covers the header pipe 51. The fixing members 63 and 64 are each formed by injection molding of a synthetic resin as a split part that sandwiches the header pipe 52.

  The fixing member 62 wraps the lower end of the header pipe 51, and the fixing member 64 wraps the lower end of the header pipe 52, and is interposed between the heat exchanger 50 and the upper surface of the bottom plate 11 BT of the housing 11. For this reason, even if the bottom plate 11BT is made of a steel plate, there is no possibility that electrolytic corrosion occurs between the heat exchanger 50 and the bottom plate 11BT.

  A mechanism for fixing the fixing members 63 and 64 to the header pipe 52 will be described by taking the fixing member 63 as an example. A mechanism for fixing the fixing members 61 and 62 to the header pipe 51 will be described later.

  As described above, the fixing member 63 is formed by injection molding of synthetic resin as a split part. The part 63F and the part 63B are the split parts. The component 63F is applied to the header pipe 52 from the front side of the housing 11, and the component 63B is applied to the header pipe 52 from the back side of the housing 11.

  As shown in FIG. 9, two hooks 65 are formed on the side surface of the component 63 </ b> F facing the right side surface 11 </ b> R of the housing 11 with a vertical spacing, and the component facing the right side surface 11 </ b> R of the housing 11. Two hook receivers 66 with which a hook 65 engages are formed on the side surface of 63B with a space in the vertical direction. By engaging the hook 65 with the hook receiver 66, the parts 63F and 63B are connected to each other on one side surface.

  The connection on the other side surface of the parts 63F and 63B is made by a fastening element. Here, two screws 67 and 68 are used as fastening elements. Both screws 67 and 68 pass through the part 63F and are screwed into the part 63B.

  The screw 67 has a short length and is screwed into the component 63B at a position above the side plate 56. The screw portion of the screw 67 is surrounded by the parts 63F and 63B and does not contact the side plate 56. For this reason, the screw 67 does not cause electric corrosion on the side plate 56.

  The screw 68 is longer than the screw 67 and is screwed into the component 63 </ b> B so as to pass between the two flat tubes 53 at a position below the side plate 56. The corrugated fin 55 where the screw 68 passes between the flat tubes 53 is shorter than the other corrugated fins 55, and the corrugated fin 55 has a space 59 between the header pipe 52. The screw 68 passes through the space 59 without contacting the flat tube 53 or the corrugated fin 55. For this reason, the screw 68 does not cause electric corrosion on the flat tube 53 and the corrugated fin 55.

  If the screws 67 and 68 are tightened, the fixing member 63 can be firmly fixed to the header pipe 52. Since the screw 68 passes through the space 59 formed in a part of the corrugated fin 55, a screw having a large cross-sectional area can be used for the screw 68, and the fixing of the fixing member 63 to the header pipe 52 is further strengthened. Can be. Further, since the screw 68 passes between the two flat tubes 53, even if the fixing member 63 tries to be displaced in the axial direction of the header pipe 52, the screw 68 is caught by the flat tube 53. Such movement is prevented. Therefore, there is little possibility that the fixing member 63 falls off from the heat exchanger 50.

  The fixing members 63 and 64 fixed to the header pipe 52 are fixed by screws 70 to a steel plate panel 69 which is a back surface constituting member of the housing 11 as shown in FIG. Thereby, the rigidity of the entire casing 11 of the outdoor unit 10 is also increased.

  A space 59 formed in a part of the corrugated fin 55 is formed by cutting out a part of the corrugated fin 55. The method of forming a space by cutting off a part of the fin in this way is also applicable when plate fins are used instead of corrugated fins. In the case of the corrugated fin 55, the space 59 can also be formed by compressing it in the length direction of the flat tube 53.

  Instead of the screws 67 and 68, a combination of a hook formed on the part 63F and a hook receiver formed on the part 63B, or a combination of a hook formed on the part 63B and a hook receiver formed on the part 63F may be used. it can. Whether formed on the part 63F or the part 63B, the hook engages with the other part without contacting the heat exchanger 50. If the combination of the hook and the hook receiver is used as described above, the fixing member 63 can be easily fixed to the header pipe 52 without a tool.

  Alternatively, the parts 63F and 63B can all be fixed with screws. In this case, a screw is used instead of the combination of the hook 65 and the hook receiver 66.

  The fixing member 63 may be formed of a metal that is electrically lower than aluminum instead of synthetic resin. The same applies to the fixing members 61, 62, 64.

  Next, a mechanism for fixing the fixing members 61 and 62 to the header pipe 51 will be described with reference to FIGS. 14 to 17.

  As shown in FIG. 16, a total of three rail-like protrusions 51 a extending along the axial direction of the header pipe 51 are formed on the side surface of the header pipe 51 at intervals of 90 °. The protrusion 51a does not exist on the side surface into which the flat tube 53 is inserted. The protrusion 51a may be integrally formed with the header pipe 51 by extrusion molding, or may be a separate part fixed to the header pipe 51 by brazing, welding, or other means.

  The fixing member 61 is placed on the heat exchanger 50 from above so as to hold the upper end portion of the header pipe 51, the upper side plate 56, and the flat tubes 53 and the corrugated fins 55 corresponding to several steps from above. As shown in FIG. 16, a recess 61 a that receives the protrusion 51 a is formed on the inner surface of the fixing member 61. For this reason, the twist of the fixing member 61 with respect to the header pipe 51 is prevented.

  The fixing member 62 is placed on the heat exchanger 50 from below so as to hold the lower end portion of the header pipe 51, the lower side plate 56, and the flat tubes 53 and corrugated fins 55 corresponding to several steps from below. A recess similar to the recess 61 a of the fixing member 61 is also formed on the inner surface of the fixing member 62. For this reason, the twist of the fixing member 62 with respect to the header pipe 51 is prevented.

  As shown in FIG. 17, the fixing members 61 and 62 placed on the heat exchanger 50 as described above are fixed to the steel plate panel 71 which is the left side constituent member of the housing 11 with screws 72. As described above, since the fixing members 61 and 62 are prevented from being twisted with respect to the header pipe 51, the header pipe 51 tends to twist with respect to the fixing members 61 and 62 fixed to the steel plate panel 71 with the screws 72. That will also be blocked. For this reason, the heat exchanger 50 is fixed to the housing 11 more firmly and more easily withstands impact and vibration during transportation. The rigidity of the entire outdoor unit 10 is further improved.

  A protrusion similar to the protrusion 51 a formed on the header pipe 51 may be formed on the header pipe 52. Further, the positions of the protrusions and the recesses may be reversed so that the recesses are formed on the header pipe side and the protrusions are formed on the fixing member side. The shape of the protrusion is not limited to the rail shape. A point-like protrusion may be sufficient and the structure which a plurality of point-like protrusions continue at intervals may be sufficient.

  The heat exchanger 50 is not limited to a side flow type parallel flow heat exchanger. A downflow parallel flow heat exchanger may be used.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

  The present invention is widely applicable to an air conditioner equipped with a parallel flow heat exchanger.

DESCRIPTION OF SYMBOLS 1 Air conditioner 10 Outdoor unit 11 Case 30 Indoor unit 31 Case 50 Heat exchanger 51, 52 Header pipe 53 Flat tube 55 Corrugated fin 59 Space 61, 62, 63, 64 Fixing member 67, 68 Screw

Claims (6)

Two header pipes arranged parallel to each other at intervals, a plurality of flat tubes arranged between the two header pipes and having a refrigerant passage provided therein communicating with the inside of the header pipe; In an air conditioner equipped with a parallel flow type heat exchanger having a plurality of fins attached to a flat surface of a plurality of flat tubes,
The parallel flow type heat exchanger is fixed to the casing of the air conditioner through a fixing member fixed to at least one of the two header pipes,
The fixing member is formed as a split part that sandwiches the header pipe by a material that does not generate electrolytic corrosion in the parallel flow heat exchanger, and is fixed to the header pipe by a fastening element that passes between the flat tubes. An air conditioner characterized by being made.   The air conditioner according to claim 1, wherein a space for allowing the fastening element to pass between the flat tubes is formed in a part of the fin.   The air conditioner according to claim 2, wherein the fin is a corrugated fin, and the space is formed by compressing the corrugated fin in a length direction of the flat tube.   4. The screw according to claim 1, wherein the fastening element is a screw that passes through one part of the split part and is screwed into the other part without contacting the parallel flow heat exchanger. 5. Air conditioner as described in.   4. The hook according to claim 1, wherein the fastening element is a hook that is formed on one of the split parts and engages with the other part without contacting the parallel flow heat exchanger. The air conditioner described in Crab.   The air conditioner according to any one of claims 1 to 5, wherein a synthetic resin is selected as a material of the fixing member.

Images