JP2011092331A - Method for assembling heat pump unit of washing and drying machine, and heat pump unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for assembling a heat pump unit of a washing and drying machine where precision in assembling of a compressor is improved, by absorbing variation in dimensions of a heat exchange portion and a piping member without decreasing productivity. <P>SOLUTION: The end of a first tube 51 and that of the fourth tube 54 of the piping member 34 connected with the heat exchange portion 32 are free ends. Therefore, when the compressor 31 and the heat exchange portion 32 are arranged in a casing 35, the piping member 34 is fit into the refrigerant outlet 55 of the compressor 31 or the refrigerant inlet 56 of an accumulator 33 and welded. Thus, by adjusting the position of the piping member 34 when connecting the piping member 34 to the compressor 31 and the accumulator 33, the variation in dimensions of the heat exchange portion 32 and the piping member 34 is reduced. As a result, force applied from the piping member 34 to the compressor 31 and the accumulator 33 is reduced, and the variation in the position of the compressor 31 with respect to the casing 35 is also reduced. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for assembling a heat pump unit of a washing / drying machine and a heat pump unit.

  2. Description of the Related Art Conventionally, a washing and drying machine equipped with a heat pump unit and using air dried and heated by the heat pump unit for drying clothes is known. Since the compressor which comprises such a heat pump unit becomes a generation | occurrence | production source of a vibration, high sound-proof property and vibration-proof property are requested | required (refer patent documents 1-3). For example, in Patent Document 1, the compressor is covered with a sheet to ensure soundproofing against the sound generated from the compressor. In the case of Patent Document 2 and Patent Document 3, the compressor support structure is devised to ensure the vibration-proofing property of the compressor.

JP 2008-89919 A Japanese Patent Laid-Open No. 2008-260 JP 2001-132684 A

  However, the compressor is accommodated in the casing together with the heat exchange unit. Therefore, even if the soundproofing and vibration isolating properties of the compressor itself are increased, the vibration generated from the compressor propagates to the casing and the heat exchange unit. As long as the compressor is attached to a casing or the like, this vibration propagation cannot be avoided. As a result, the vibration propagated to the casing and the heat exchanging portion is propagated to other members in contact with the casing and the heat exchanging portion, causing a larger vibration of the member. As a result, even if the vibration isolating performance of the compressor itself is ensured, new noise is generated due to vibrations of other members, and it is difficult to reduce the overall noise.

  Therefore, it is considered to provide an appropriate gap in the vibration propagation path. Specifically, a hole provided in the leg portion of the compressor and a convex portion provided integrally with the casing are assembled while aligning the cores, so that the space between the leg portion of the compressor and the convex portion of the casing is set. A gap is formed. By forming a gap in the portion where the compressor and the casing are assembled in this way, direct contact between the members is reduced, and vibration propagation and noise are reduced. However, in order to secure an appropriate gap by aligning the cores between the members where the compressor and the casing are assembled, high dimensional accuracy and assembly accuracy of each member are required, leading to a decrease in productivity. is there. In particular, the compressor and the heat exchange unit are connected by a metal piping member through which a refrigerant flows. The accuracy of the position of the piping member with respect to the heat exchanging portion and the positional relationship between the compressor connected by the piping member and the heat exchanging portion include variations in a predetermined range as long as it is an industrial product. Therefore, even if the accuracy of the assembly position of the compressor is increased, a force is applied to the connection portion between the piping member and the compressor by connecting the compressor and the heat exchange unit via the piping member. As a result, a change occurs in the position of the compressor, and a misalignment occurs in the mounting portion of the compressor. Thereby, since the leg part of a compressor and the convex part of a casing contact directly, a vibration is transmitted and there exists a problem that ensuring of vibration proofing becomes difficult.

  Accordingly, an object of the present invention is to provide a heat pump unit assembling method and a heat pump unit for a washing / drying machine that can absorb variations in the dimensions of the heat exchange section and the piping member without causing a decrease in productivity, and can improve the assembling accuracy of the compressor. It is to provide.

  In order to solve the above-described problems, a method for assembling the heat pump unit of the washing and drying machine of the present application includes a compressor that compresses and discharges the refrigerant, a heat exchange unit that performs heat exchange of the refrigerant discharged from the compressor, An accumulator that is provided integrally with a compressor and separates gas and liquid contained in the refrigerant that has passed through the evaporator; a piping member that connects the compressor, the heat exchanging unit, and the accumulator; A heat pump unit for a washer / dryer comprising a compressor, a heat exchanger, a casing for housing the accumulator and the piping member, wherein the compressor and the piping member are connected in advance to the casing Arranging the heat exchanging part and the heat exchange of the piping member; The pipe member, the refrigerant outlet, and the piping member are fitted into the refrigerant outlet provided in the compressor and the refrigerant inlet provided in the accumulator, respectively. And a step of welding between the refrigerant inlets.

  According to the above procedure, the end of the piping member connected to the heat exchanging part is opposite to the heat exchanging part at the end of the compressor outlet or the accumulator refrigerant outlet after the compressor and the heat exchanging part are arranged on the casing. It is fitted and welded. That is, the piping member is attached to the compressor after the position of the compressor with respect to the casing is determined, that is, after the positional accuracy of the compressor is ensured. Therefore, by adjusting the position of the relatively flexible piping member when connecting the piping member to the compressor and the accumulator, variations in the dimensions of the heat exchange unit and the piping member are absorbed. As a result, the force applied to the compressor and accumulator from the piping member is reduced, and the shift of the position of the center of the leg of the compressor relative to the mounting portion of the casing is also reduced. Therefore, it is possible to absorb variations in the dimensions of the heat exchange section and the piping member without causing a decrease in productivity, and it is possible to improve the assembly accuracy of the compressor.

The schematic diagram which shows the structure of the washing-drying machine by one Embodiment. The schematic perspective view which shows the heat pump unit of the washing-drying machine by one Embodiment. The schematic plan view which shows the heat pump unit of the washing-drying machine by one Embodiment. 1 is a schematic exploded perspective view showing configurations of a base member, a cover, and a case cover on which a heat pump unit is mounted in a washing / drying machine according to an embodiment. The schematic sectional drawing which expanded the vicinity of the leg part of the compressor in the heat pump unit, and the protrusion part of a casing in the washing and drying machine by one embodiment. The schematic plan view which expanded the vicinity of the leg part of the compressor in the heat pump unit and the protrusion part of a casing in the washing-drying machine by one Embodiment. FIG. 6 is a schematic view showing a state in which the center of the leg portion of the compressor is shifted from the center of the protruding portion of the casing.

Hereinafter, a washing and drying machine according to an embodiment of the present invention will be described with reference to the drawings.
First, a schematic configuration of a washing / drying machine according to an embodiment will be described. As shown in FIG. 1, the washing / drying machine 10 includes a housing 11, a rotating tub 12, a motor 13, and a heat pump unit 14. The casing 11 forms an outline of the washing / drying machine 10. The casing 11 accommodates a water tank 15 inside. The water tank 15 further accommodates the rotating tank 12 therein. Both the water tank 15 and the rotating tank 12 are formed in a cylindrical shape with an opening at the front. The end of the water tank 15 on the opening side is connected to the opening 16 for taking in and out the laundry formed on the front end side of the housing 11 by a bellows 17. The laundry opening / closing opening 16 formed in the housing 11 is opened and closed by a door 18. The rotating tub 12 accommodated in the water tank 15 becomes a washing room at the time of washing and becomes a drying room at the time of drying.

  A water supply case 21 is provided on the inner side above the housing 11. The water supply case 21 incorporates a water supply valve 22. The water supply valve 22 is connected to a water tap through a hose. Thereby, tap water is supplied to the water tank 15 at the time of washing. The rotary tank 12 has a hole 23 almost entirely in the cylindrical body portion. The hole 23 functions as a hole for water flow and also functions as a hole for ventilation. The water supplied from the water supply valve 22 is supplied into the rotary tank 12 through these holes 23. The water tank 15 has a drain port 24 at the lower end. A drain hose is connected to the drain port 24. The drain hose has an end opposite to the drain port 24 taken out of the washing / drying machine 10.

  The rotating tank 12 is provided with a rotating shaft 25 at the center on the rear end side. The rotating shaft 25 protrudes further rearward from the rear end of the rotating tub 12. A rotor (not shown) of the motor 13 is attached to an end portion of the projecting rotating shaft 25. Thereby, the motor 13 rotationally drives the rotating tub 12 around the rotating shaft 25. The water tank 15 is provided with a hot air outlet 26 above the opening 16 on the front end side. Further, the water tank 15 is provided with a hot air inlet 27 on the rear end side. The hot air outlet 26 and the hot air inlet 27 are connected by a ventilation path 28.

  The washing / drying machine 10 includes a heat pump unit 14 at the bottom of the housing 11. As shown in FIGS. 2 and 3, the heat pump unit 14 includes a compressor 31, a heat exchange unit 32, an accumulator 33, a piping member 34, and a casing 35. The compressor 31, the heat exchange unit 32, the accumulator 33, and the piping member 34 are accommodated in the casing 35. The casing 35 forms an air passage 36 through which air circulates between the heat exchanger 32 and the water tank 15. The air passage 36 is connected to the ventilation path 28 as shown in FIG. The ventilation path 28 connects the heat pump unit 14 and the water tank 15.

  The heat pump unit 14 is provided with a fan unit 37 as shown in FIG. The fan unit 37 has a blower fan 38. The blower fan 38 is provided in the middle of the ventilation path 28 as shown in FIG. Thereby, the blower fan 38 forms a flow of air that circulates between the heat pump unit 14 and the water tank 15. As shown in FIG. 4, the heat pump unit 14 is mounted on the base member 40 together with the fan unit 37. The base member 40 is attached to the lower surface of the housing 11 as shown in FIG.

  The casing 35 is made of resin, and integrally includes a heat exchange mounting portion 41 and a compressor mounting portion 42 as shown in FIGS. 2 and 3. The heat exchange mounting portion 41 is provided at a portion corresponding to the air passage 36, and the heat exchange portion 32 is mounted thereon. The compressor mounting portion 42 is provided adjacent to the heat exchange mounting portion 41, and the integrated compressor 31 and accumulator 33 are mounted thereon.

  The piping member 34 forms a refrigerant passage from the compressor 31 to the compressor 31 through the heat exchange unit 32 and the accumulator 33 in order. The refrigerant compressed by the compressor 31 is discharged from the compressor 31 and supplied to the heat exchange unit 32 via the piping member 34. The heat exchange unit 32 includes a condenser 43, an evaporator 44, and a throttle 45. The condenser 43 and the evaporator 44 are provided in the air passage 36 of the casing 35 as described above, and have a large number of fins for exchanging heat with the air flowing through the air passage 36. The refrigerant compressed by the compressor 31 flows in the order of the condenser 43, the throttle 45, and the evaporator 44 in the heat exchange unit 32. As a result, the refrigerant is dissipated in the condenser 43, then the pressure is released in the throttle 45 and supplied to the evaporator 44.

  The compressor 31 compresses the refrigerant as described above and discharges the refrigerant to the heat exchange unit 32 side. The condenser 43 passes through the refrigerant whose temperature has been increased by the compressor 31. When the refrigerant passes through the condenser 43, the refrigerant is dissipated, while the air passing through the condenser 43 is heated in the air passage 36. The throttle 45 releases the pressure of the compressed refrigerant. In the evaporator 44, the refrigerant whose pressure is released by the restrictor 45 flows. When the pressure is released in the restrictor 45 and the refrigerant is vaporized, the refrigerant whose temperature is reduced by the heat of evaporation at the time of vaporization flows into the evaporator 44. As a result, when the refrigerant passes through the evaporator 44, the air passing through the evaporator 44 in the air passage 36 is cooled. The accumulator 33 is provided integrally with the compressor 31 and separates gas and liquid contained in the refrigerant that has passed through the evaporator 44. The refrigerant that has passed through the evaporator 44 is in a state where gas and liquid are mixed. When the liquid refrigerant flows into the compressor 31, the capacity of the compressor 31 is reduced. Therefore, the accumulator 33 separates the gas and liquid contained in the refrigerant on the inlet side of the compressor 31.

  The piping member 34 has a first pipe part 51, a second pipe part 52, a third pipe part 53, and a fourth pipe part 54. The first pipe portion 51 connects the refrigerant outlet 55 provided in the compressor 31 and the condenser 43. The second pipe portion 52 connects the capacitor 43 and the restrictor 45. The third pipe portion 53 connects the restrictor 45 and the evaporator 44. The fourth pipe portion 54 connects the evaporator 44 and the refrigerant inlet 56 of the accumulator 33. The piping member 34 is formed of a metal pipe such as a copper pipe, for example, and forms a refrigerant passage through which a refrigerant flows. As shown in FIG. 2, the piping member 34 has curved portions 57 in the first pipe portion 51 between the refrigerant outlet 55 and the condenser 43 and the fourth pipe portion 54 between the refrigerant inlet 56 and the evaporator 44. Have. The curved portion 57 has a dimensional error of the piping member 34 and the compressor 31 between the refrigerant outlet 55 of the first pipe portion 51 and the condenser 43 and between the refrigerant inlet 56 of the fourth pipe portion 54 and the evaporator 44. In addition, it is provided for the purpose of absorbing positional errors between the accumulator 33 and the heat exchanging section 32.

  The air supplied from the water tank 15 to the heat pump unit 14 by driving the blower fan 38 of the fan unit 37 first passes through the evaporator 44 in the air passage 36. The air flowing through the air passage 36 is cooled when passing through the evaporator 44. Therefore, the water vapor contained in the air circulating between the heat pump unit 14 and the water tank 15 is condensed in the evaporator 44. Thereby, the water | moisture content in the air supplied to the heat pump unit 14 is removed, and the humidity of air falls. The air that has passed through the evaporator 44 subsequently passes through the condenser 43. In the condenser 43, the air from which moisture has been removed by the evaporator 44 is heated. As a result, in the heat pump unit 14, the air dried by the evaporator 44 is heated by the condenser 43. The air dried and heated by passing through the heat pump unit 14 is supplied to the water tank 15. The air supplied to the water tank 15 absorbs moisture contained in the laundry in the rotary tank 12 and then circulates again to the heat pump unit 14. Thereby, the laundry accommodated in the rotating tub 12 is dried.

  The compressor 31 accommodated in the casing 35 is held by the casing 35 at the attachment portion 61. The attachment portion 61 is composed of a convex portion 62 of the casing 35 and a hole 63 of the compressor 31. The convex portion 62 is formed integrally with the casing 35 and rises upward from the bottom portion of the casing 35. The hole 63 is provided in the leg portion 64 of the compressor 31 and penetrates the leg portion 64 in the vertical direction.

  The leg portions 64 are equally disposed at three locations in the circumferential direction on the outer peripheral side below the compressor 31. As shown in FIG. 5, the convex portion 62 is formed in a columnar shape that rises upward from the bottom of the casing 35. An elastic member 621 is provided on the outer peripheral side of the convex portion 62. The elastic member 621 is made of an elastic material such as rubber or elastomer, for example. The elastic member 621 has a cylindrical shape into which the convex portion 62 is inserted, and is formed in a bellows shape that can be vertically expanded and contracted. The convex portion 62 is provided with a washer 622 and a screw member 623 on the upper end side. The screw member 623 fixes the washer 622 to the convex portion 62. The washer 622 prevents the elastic member 621 from coming off the convex portion 62 without contacting the upper end of the elastic member 621. Further, the elastic member 621 is set such that the inner diameter on the upper end side is larger than that on the lower end side. Therefore, the inner wall of the elastic member 621 is in contact with the convex portion 62 on the lower end side. On the other hand, in the elastic member 621, a slight gap is formed between the inner wall and the outer wall of the convex portion 62 on the upper end side. The leg portion 64 of the compressor 31 is located on the opposite side of the gap with the elastic member 621 interposed therebetween. The elastic member 621 is fitted to the inner wall of the leg portion 64 that forms the hole 63 in the groove portion 624. Thereby, a slight gap is formed between the elastic member 621 fitted into the hole 63 of the compressor 31 and the convex portion 62. Due to this slight gap, the transmission of vibration from the compressor 31 to the casing 35 is absorbed, and the resonance of the casing 35 due to the vibration of the compressor 31 is reduced as compared with the case where the compressor 31 and the casing 35 are firmly coupled. .

  The compressor 31 and the accumulator 33 housed in the casing 35 and mounted on the base member 40 are covered with a soundproof member 65 and covered with a cover 66 as shown in FIG. The soundproof member 65 is formed of, for example, rubber or foaming flexible resin, and covers the outside of the compressor 31 and the accumulator 33. The cover 66 accommodates the compressor 31 and the accumulator 33 inside. Thereby, the cover 66, together with the soundproof member 65, shields noise from the compressor 31 and the accumulator 33, particularly sound generated by the compressor 31, and reduces leakage of sound to the outside. Further, the case cover 67 covers the heat exchanging unit 32 from above in addition to the compressor 31 and the accumulator 33 covered by the cover 66. Accordingly, the entire heat pump unit 14 is accommodated between the casing 35 and the case cover 67 as shown in FIG. Similarly to the cover 66, the case cover 67 covers the heat pump unit 14 including the compressor 31 to reduce sound leakage to the outside.

Next, a method for assembling the heat pump unit 14 of the washing / drying machine 10 configured as described above will be described.
In the heat pump unit 14, the piping member 34 is attached to the heat exchange unit 32 prior to assembly to the casing 35. That is, the piping member 34 is attached to the condenser 43, the evaporator 44, and the restrictor 45 that constitute the heat exchange unit 32. Specifically, the condenser 43 is provided with a first pipe portion 51 connected to the compressor 31 on the inlet side where the refrigerant flows from the compressor 31. At this time, the 1st pipe part 51 which connects the compressor 31 and the capacitor | condenser 43 is not connected to the compressor 31 on the opposite side to the capacitor | condenser 43, but becomes a free end. Further, the capacitor 43 is formed by bending a plurality of refrigerant passages. Therefore, the pipe member 34 is exposed from the capacitor 43 at a portion corresponding to the folded refrigerant passage. Therefore, the piping member 34 exposed from the capacitor 43 is also attached to the capacitor 43. The capacitor 43 and the piping member 34 are connected by, for example, welding or brazing.

  Similarly, the second pipe portion 52 is attached between the condenser 43 and the restrictor 45, and the third tube portion 53 is attached between the restrictor 45 and the evaporator 44. Further, the evaporator 44 is provided with a fourth pipe portion 54 connected to the accumulator 33 on the outlet side where the refrigerant flows out to the accumulator 33. At this time, the fourth pipe portion 54 that connects the evaporator 44 and the accumulator 33 is not connected to the accumulator 33 at the end opposite to the evaporator 44 and is a free end. Further, the evaporator 44 is formed by bending a plurality of refrigerant passages in the same manner as the capacitor 43. Therefore, the pipe member 34 is exposed from the evaporator 44 at a portion corresponding to the folded refrigerant passage. Therefore, the piping member 34 exposed from the evaporator 44 is also attached to the evaporator 44. The evaporator 44 and the piping member 34, and the restrictor 45 and the piping member 34 are connected, for example, by welding or brazing.

  As described above, when the piping member 34 is connected to the condenser 43, the evaporator 44, and the restrictor 45, the condenser 43, the evaporator 44, and the restrictor 45 constituting the heat exchanging section 32 are mounted on a jig (not shown). A piping member 34 is attached. This jig corresponds to the shape of the heat exchange mounting portion 41 of the casing 35. That is, the jig is formed to imitate the shape of the heat exchange mounting portion 41 on which the heat exchange portion 32 of the casing 35 is mounted. Thereby, the piping member 34 is attached in a state in which the condenser 43, the evaporator 44, and the expander 45 constituting the heat exchange unit 32 are mounted on a jig corresponding to the shape of the heat exchange mounting unit 41 of the casing 35. As a result, the positions of the condenser 43, the evaporator 44 and the throttle 45 are accurately determined corresponding to the casing 35 without being mounted on the casing 35, and the piping member 34 is connected to an appropriate position.

  When the condenser 43, the evaporator 44, the constrictor 45, and the piping member 34 that constitute the heat exchanging unit 32 are assembled in a jig (not shown), the heat exchanging unit 32 in which the piping member 34 is assembled becomes the heat exchanging mounting portion of the casing 35. 41 is attached. At this time, the compressor 31 in which the accumulator 33 is integrally assembled is also attached to the compressor mounting portion 42 of the casing 35. In this case, it is desirable to mount the compressor 31 and the accumulator 33 on the compressor mounting section 42 prior to mounting the heat exchange section 32. In the compressor 31 in which the accumulator 33 is integrally assembled, the convex portion 62 of the casing 35 to which the elastic member 621 is previously attached is inserted into the hole 63 of the leg portion 64. The leg portion 64 that forms the hole 63 is fitted into a groove portion 624 formed on the outer peripheral side of the elastic member 621. At this time, the convex part 62 and the hole 63 are assembled at the three leg parts 64 so that their centers coincide with each other, that is, with the cores aligned. In this manner, by inserting the convex portion 62 into the hole 63 of the compressor 31, the convex portion 62 and the elastic member 621 on the lower side of the convex portion 62 come into contact with each other. By the contact between the convex portion 62 and the elastic member 621, the positional relationship between the compressor 31 and the casing 35 is determined so that the centers of the convex portion 62 and the hole 63 coincide as shown in FIG.

  The heat exchange unit 32 is attached to the heat exchange mounting unit 41 from above in a state where the compressor 31 and the accumulator 33 are mounted on the compressor mounting unit 42. As a result, when the heat exchanging unit 32 is mounted on the casing 35 from above, the end of the piping member 34 that is a free end is inserted into the refrigerant outlet 55 of the compressor 31 and the refrigerant inlet 56 of the accumulator 33 from above. Specifically, the free end of the first pipe part 51 connected to the condenser 43 is inserted into the refrigerant outlet 55 of the compressor 31. In addition, the free end of the fourth pipe portion 54 connected to the evaporator 44 is inserted into the refrigerant inlet 56 of the accumulator 33.

  The piping member 34 includes curved portions 57 between the condenser 43 and the refrigerant outlet 55 in the first pipe portion 51 and between the evaporator 44 and the refrigerant inlet 56 in the fourth pipe portion 54. The shape of the piping member 34 can be changed relatively freely in the curved portion 57. When the heat exchange unit 32 is mounted on the casing 35, the compressor 31 and the accumulator 33 are attached to the casing 35 in advance. At this time, the positional relationship between the compressor 31 and the casing 35 is determined by inserting the convex portion 62 of the casing 35 into the hole 63 of the leg portion 64 via the elastic member 621. When the piping member 34 having a sufficient shape is connected in a state where the position is determined between the compressor 31 and the casing 35 in this way, an excessive force is applied to the piping member 34, and the compressor 31 is removed from the piping member 34. There is a possibility that the position may change due to the force received. Therefore, when the piping member 34 is connected to the compressor 31 and the accumulator 33 by providing the bending portion 57 that absorbs the change in shape in the middle of the piping member 34 as in the present embodiment, the piping member 34 has the bending portion 57. It is easily deformed when used. Therefore, an excessive force is not applied to the piping member 34, and an excessive force is not applied to the compressor 31 and the accumulator 33 connected to the piping member 34. As a result, the positional relationship between the compressor 31 and the casing 35 that is accurately determined by inserting the convex portion 62 into the hole 63 of the leg portion 64 is not changed by the connection of the piping member 34.

  Conventionally, after the compressor 31, the accumulator 33, and the heat exchanging portion 32 are connected to each other by a piping member 34 using a jig, the compressor 31, the accumulator 33, and the heat exchanging portion 32 are mounted on the casing 35. In the case of such a conventional procedure, there is a range in the dimensional accuracy of the piping member 34 or the connection accuracy between the piping member 34 and each part, that is, the processing accuracy at the time of welding. Further, the casing 35 also has an error in size and shape for each individual. For this reason, even if the compressor 31 and the accumulator 33 and the heat exchanging unit 32 are connected by the piping member 34 while ensuring accuracy in the jig, deformation due to individual differences is caused when mounting on the casing 35. As a result, the elastic member 621 is deformed, and the gap between the leg portion 64 of the compressor 31 and the convex portion 62 of the casing 35 becomes nonuniform as shown in FIG. Thereby, the convex part 62 and the leg part 64 contact via the elastic member 621 and cause the transmission of vibration from the compressor 31 to the casing 35. In FIGS. 6 and 7, the washer 622 and the screw member 623 are not shown.

  On the other hand, in the case of the above-described embodiment, the piping member 34 is attached to the compressor 31 and the accumulator 33 after the compressor 31 and the accumulator 33 are attached to the casing 35 while determining their positions. The piping member 34 is provided with a curved portion 57 that absorbs deformation. Thereby, as shown in FIG. 6, the position of the compressor 31 once determined is not changed by the connection of the piping member 34. As a result, a gap is secured between the leg portion 64 of the compressor 31 and the convex portion 62 of the casing 35.

  When the first pipe portion 51 is inserted into the refrigerant outlet 55 of the compressor 31 and the fourth pipe portion 54 is inserted into the refrigerant inlet 56 of the accumulator 33, the connection portion, that is, the end portions of the refrigerant outlet 55 and the refrigerant inlet 56 are welded. Or it is fixed by brazing. Thereby, the connection of the piping member 34, the compressor 31, and the accumulator 33 is completed. Thus, when the piping member 34, the compressor 31, and the accumulator 33 are welded or brazed, the piping member 34 is softened by heating. Therefore, the deformation force remaining in the piping member 34 when the heat exchanging unit 32, the compressor 31, and the accumulator 33 are connected by the piping member 34 is also eliminated. As a result, the position of the piping member 34 itself is stabilized, and even when the heat exchange unit 32, the compressor 31 and the accumulator 33 are connected by the piping member 34, the compressor 31 is secured to the casing 35 in the correct position.

  When the mounting of the compressor 31, the accumulator 33, and the heat exchange unit 32 is completed on the casing 35, the casing 35 on which the compressor 31 and the like are mounted is attached to the base member 40. At this time, the cover 66 and the case cover 67 are also attached as shown in FIG. As shown in FIG. 4, the casing 35 and the base member 40 are held by a fastening member 70 such as a screw. At this time, the casing 35 and the base member 40 are connected while securing a portion that avoids transmission of vibration, such as a gap, for example, as in the case between the compressor 31 and the casing 35. As a result, transmission of vibration from the compressor 31 to the casing 35 and transmission of vibration from the casing 35 to the base member 40 are both reduced.

  In the embodiment described above, the end of the first pipe part 51 and the end of the fourth pipe part 54 of the piping member 34 connected to the heat exchange part 32 are connected to the casing 35 with the compressor 31 and the heat exchange part 32. Is fitted into the refrigerant outlet 55 of the compressor 31 or the refrigerant inlet 56 of the accumulator 33 and welded. That is, the piping member 34 is attached to the compressor 31 after the positions of the compressor 31 and the accumulator 33 with respect to the casing 35 are determined, that is, after the positional accuracy of the compressor 31 is ensured. Therefore, by adjusting the position of the relatively flexible piping member 34 when connecting the piping member 34 to the compressor 31 and the accumulator 33, variations in the dimensions of the heat exchange section 32 and the piping member 34 are absorbed. Furthermore, the connected piping member 34 is also heated during welding or brazing, so that the remaining deformation stress is eliminated and the position of the piping member 34 itself is stabilized. As a result, the force applied from the piping member 34 to the compressor 31 and the accumulator 33 is greatly reduced, and the change in the position of the compressor 31 relative to the casing 35 is reduced. Therefore, variations in the dimensions of the heat exchanging section 32 and the piping member 34 can be absorbed without reducing productivity, and the assembly accuracy of the compressor 31 can be increased.

  Moreover, in one embodiment, before arranging the compressor 31 and the heat exchange part 32 in the casing 35, the heat exchange part 32 and the piping member 34 are connected with a jig corresponding to the shape of the heat exchange mounting part 41 of the casing 35. Is done. Therefore, the piping member 34 is connected while determining the positions among the condenser 43, the evaporator 44, and the expander 45 that constitute the heat exchange unit 32. Thereby, the shape accuracy of each part which comprises the heat exchange part 32 improves. On the other hand, at this time, the end portion of the piping member 34, that is, the end portion of the first pipe portion 51 on the compressor 31 side and the fourth pipe portion 54 on the accumulator 33 side is a free end. Therefore, it is possible to adjust the positions of the compressor 31 and the accumulator 33 while maintaining the shape accuracy of the heat exchange unit 32. Therefore, the position and shape accuracy of the heat exchanging section 32 can be increased without causing a decrease in productivity.

  Furthermore, in one embodiment, the piping member 34 has a curved portion 57 in the middle. Specifically, the piping members 34 are respectively connected to the first pipe part 51 between the condenser 43 and the refrigerant outlet 55 of the compressor 31 and the fourth pipe part 54 between the evaporator 44 and the refrigerant inlet 56 of the accumulator 33. A curved portion 57 is provided. When the piping member 34 is connected to the compressor 31 and the accumulator 33 by providing the bending portion 57 whose shape can be changed in the middle of the piping member 34, the piping member 34 is deformed using the bending portion 57. Therefore, an excessive force is not applied to the piping member 34, and an excessive force is not applied to the compressor 31 and the accumulator 33 connected to the piping member 34. As a result, the positional relationship between the compressor 31 and the casing 35 that is accurately determined by inserting the convex portion 62 into the hole 63 of the leg portion 64 is not changed by the connection of the piping member 34. Therefore, the positional relationship between the compressor 31 and the casing 35 can be stably maintained, and propagation of vibration from the compressor 31 and generation of noise due to vibration can be reduced.

(Other embodiments)
The present invention described above is not limited to the above-described embodiment, and can be applied to various embodiments without departing from the gist thereof.
For example, in the above-described embodiment, the curved portion 57 is provided both between the refrigerant outlet 55 of the first pipe portion 51 and the condenser 43 and between the refrigerant inlet 56 of the fourth pipe portion 54 and the evaporator 44. Explained. However, the bending portion 57 may be provided in either the first tube portion 51 or the fourth tube portion 54 without being provided in both the first tube portion 51 and the fourth tube portion 54. Even in this case, the displacement of the position of the compressor 31 can be reduced by absorbing the displacement of the position and the error of the shape by the piping member 34 on the side having the curved portion 57.

  In the drawings, 10 is a washing / drying machine, 14 is a heat pump unit, 31 is a compressor, 32 is a heat exchanger, 33 is an accumulator, 34 is a piping member, 35 is a casing, 55 is a refrigerant outlet, 56 is a refrigerant inlet, and 57 is curved. Indicates the part.

Claims (3)

A compressor that compresses and discharges the refrigerant, a heat exchange unit that performs heat exchange of the refrigerant discharged from the compressor, and a gas and a liquid that are provided integrally with the compressor and that have passed through the evaporator are separated. Laundry comprising: an accumulator; a piping member that connects the compressor, the heat exchange unit, and the accumulator; and the refrigerant flows; and a casing that houses the compressor, the heat exchange unit, the accumulator, and the piping member A method for assembling a heat pump unit of a dryer,
Disposing the compressor, and the heat exchanging unit to which the piping member is connected in advance to the casing;
After fitting the end of the piping member opposite to the heat exchange section into the refrigerant outlet provided in the compressor and the refrigerant inlet provided in the accumulator, the piping member and the refrigerant Welding the outlet and between the piping member and the refrigerant inlet;
A method of assembling a heat pump unit, comprising: Before the step of arranging the compressor and the heat exchange part in the casing,
2. The heat pump unit according to claim 1, further comprising a step of connecting the piping member to the heat exchange unit in a state where the heat exchange unit is fixed to a jig having a shape corresponding to the casing prepared in advance. Assembly method. A heat pump unit assembled by the assembling method according to claim 1 or 2,
The piping member is deformed to be at least one of the heat exchange unit and the refrigerant outlet, or at least one of the heat exchange unit and the refrigerant inlet, thereby forming the heat exchange unit and the compressor. A heat pump unit comprising a curved portion that absorbs misalignment between the heat exchanger and the accumulator.

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