JP2018196673A - Clothes dryer - Google Patents

Abstract

To provide a clothes dryer which achieves improvement in reliability of a heat pump unit by a constitution in which stress does not concentrate in a connection part between piping such as a refrigerant pipe and an end plate.SOLUTION: A heat pump unit 30 has a constitution in which each of gaps is formed to be equal to or greater than 1 mm. The gaps include: a gap between a pipeline discharge part 107 of a pipeline 112 which goes out of a pipeline hole 113 for discharge part of an end plate 100 of an evaporator 125 and is connected to a discharge part pipeline 114 of a compressor 31, and the pipeline hole 113 for discharge part; a gap between the pipeline 112 which goes out of a pipeline hole 121 for suction part of the end plate 100 of a condenser 124 and is connected to a suction part pipeline 111 of the compressor 31, and the pipeline hole 121 for suction part; and a gap between the pipeline 112 which goes out of a pipeline hole 123 for pressure reducing device of the end plate 100 of the condenser 124 and is connected to a pressure reducing device pipeline 119 of a pressure reducing device 120, and the pipeline hole 123 for pressure reducing device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a clothes dryer for drying laundry such as clothes.

  Conventionally, this type of clothes dryer includes a clothes dryer having a washing function and a clothes dryer not having a washing function, and a configuration for drying laundry such as clothes by a heat pump system has been proposed (for example, , See Patent Document 1).

  FIG. 12 is a longitudinal sectional view of a conventional washer / dryer, FIG. 13 is a view showing a heat pump of the washer / dryer, FIG. 14 is a view showing an evaporator of the washer / dryer, and a is a view taken along arrow Xa. , B are Xb arrow views.

  12, 13, and 14, a heat pump unit 200 is disposed on the inner bottom portion of the outer box 201. The heat pump unit 200 includes an accumulator 246, an evaporator 233, a capillary tube 232, a condenser 229, and a compressor 227. When each of the fan motor 222 and the compressor motor (not shown) is operated, the heat pump unit 200 is cooled by the air in the water receiving tank 204 coming into contact with the cooling fins 239 in the evaporator 233, The cold air comes into contact with the heating fins 231 of the condenser 229 to warm the air, and the hot air is returned to the water receiving tank 204.

  For this reason, when undried laundry containing moisture is put in the drum 207, the evaporator 233 cools the air from the water receiving tank 204 to dehumidify, and the condenser 229 heats the dehumidified air. To do. Accordingly, warm air with low humidity is injected from the condenser 229 into the water receiving tank 204, and drying of the laundry inside the drum 207 is promoted.

  The evaporator 233 includes a branch pipe 234, a junction pipe 235, a first refrigerant pipe 236, a second refrigerant pipe 237, two end plates 238, and N (≧ 2) cooling fins 239. .

  Each of the two end plates 238 is made of a square-shaped aluminum plate, and is arranged to be opposed to each other in the left-right direction. Each of the N cooling fins 239 is made of a square aluminum plate having a smaller outline shape than the end plate 238, and is arranged between the two end plates 238 with a certain distance from each other. ing.

  Here, the first refrigerant pipe 236 and the second refrigerant pipe 237 are set to have the same length and inner diameter, and have eight straight pipe portions 244. .

  Each of these eight straight pipe portions 244 has a horizontal straight line shape, and is fitted through the two end plates 238 and the N cooling fins 239.

JP 2010-194250 A

However, in the configuration of the conventional washing and drying machine, when the laundry is shifted to the dewatering state in the state where the laundry is unbalanced in the rotating drum, the vibration system greatly shakes and the heat pump unit connected by the air circulation duct is connected. Vibration is transmitted. In particular, when the vibration system and the heat pump unit resonate at the start of dehydration, the heat pump unit will vibrate greatly, stress concentrates on the fitting part of the piping such as the refrigerant pipe and the end plate, and breaks. There existed a subject that a refrigerant | coolant might leak.

  The present invention solves the above-mentioned conventional problems, and is a garment that realizes an improvement in the reliability of the heat pump unit by adopting a configuration capable of suppressing the concentration of stress on a connection portion between a pipe such as a refrigerant pipe and an end plate. The purpose is to provide a dryer.

  In order to solve the conventional sea, a clothes dryer of the present invention includes a housing, a water tub supported by the housing, a laundry tub that is rotatably installed in the water tub, and stores laundry. A heat pump unit disposed in the housing and drying laundry in the washing tub, wherein the heat pump unit includes a heat exchanger, and the heat exchangers are arranged in parallel. Cooling fins, end plates disposed on both sides of the cooling fins, pipes disposed through the cooling fins and the end plates, and expanded, from the expanded pipe diameter, The hole diameter of a specific portion of the end plate is set large.

  The clothes dryer of the present invention can suppress the stress concentration in the pipe near the end plate, there is no refrigerant leakage over time, and it is possible to eliminate poor drying of the laundry.

Longitudinal sectional view of the washing and drying machine in the present embodiment Partial external perspective view of the washer / dryer Perspective view of a part mainly composed of the heat pump unit Perspective view of the heat pump unit of the washer / dryer Sectional view of the heat pump unit of the washer / dryer Front view of end plate of heat pump unit of the washer / dryer Sectional view around the piping of the heat pump unit of the washer / dryer Front view of cooling fin of heat pump unit of the washer / dryer Sectional view around the piping during piping resonance of the heat pump unit of the washer / dryer Stress characteristic diagram of straight pipe discharge part of heat pump unit of the washing and drying machine Stress characteristic diagram of straight pipe discharge part of heat pump unit of conventional washing dryer Longitudinal section of the washer / dryer Figure showing the heat pump of the washing and drying machine It is a figure which shows the evaporator of the washing-drying machine, a is Xa view, b is Xb view

  According to a first aspect of the present invention, there is provided a housing, a water tub supported by the housing, a washing tub rotatably accommodated in the water tub, containing laundry, and disposed in the housing. A heat pump unit that dries the laundry therein, the heat pump unit having a heat exchanger, and the heat exchanger is disposed on both sides of the cooling fins and a plurality of cooling fins arranged in parallel. An end plate, a cooling pipe and a pipe that extends through the end plate, and has a pipe that is expanded, and the hole diameter of a specific portion of the end plate is set larger than the expanded pipe diameter To do.

  As a result, stress is not concentrated on the piping in the vicinity of the end plate of the heat exchanger, so that there is no leakage of refrigerant over time and there is no dry drying of the laundry.

  In the second invention, in particular, the hole diameter of the discharge pipe section piping hole of the end plate is made larger than the expanded pipe diameter of the first invention.

  As a result, the discharge pipe of the compressor and the discharge pipe of the heat exchanger that is brazed do not partially contact the end plate, so that the pipe is less likely to be scratched by vibration during dehydration and absorbs vibration throughout the pipe. Therefore, high stress is not concentrated on the discharge portion piping in the vicinity of the end plate, and it is possible to eliminate poor drying due to refrigerant leakage from the discharge piping.

  In the third invention, in particular, the diameter of the suction part piping hole of the end plate is made larger than the expanded pipe diameter of the first invention.

  As a result, the discharge pipe of the heat exchanger brazed to the discharge pipe of the compressor and the suction pipe of the heat exchanger brazed to the suction pipe of the compressor do not contact the end plate, and the entire pipe vibrates. Therefore, it is possible to further prevent the refrigerant leakage from the discharge pipe and the suction pipe by absorbing the vibration of the compressor.

  In the fourth aspect of the invention, in particular, the diameter of the decompressor section piping hole of the end plate is made larger than the expanded pipe diameter of the first aspect of the invention.

  As a result, even if the decompressor and the compressor vibrate and the discharge pipe, the suction pipe, and the decompressor pipe all resonate and vibrate, the discharge pipe hole, the suction pipe hole and the decompressor section of the end plate By enlarging the hole diameter of the piping holes, each pipe does not partially contact the end plate during vibration, so stress does not concentrate on the piping due to resonance at the start of dehydration. Generation | occurrence | production of the refrigerant | coolant leak by fatigue destruction can be prevented, and drying failure can be suppressed.

  In the fifth invention, in particular, the hole diameter of the end plate is made 1 mm or more larger than the expanded pipe diameter of any one of the first to fourth inventions.

  Thereby, piping stress can be relieved more effectively and it can control that piping contacts with an end plate even if piping vibrates, and a crack is generated.

  In the sixth invention, in particular, the hole diameter of the end plate according to any one of the first to fourth inventions is set to 10 mm or more.

  As a result, the pipe in the heat exchanger brazed to each pipe from the compressor does not partially contact the end plate, and the pipe in the heat exchanger and the discharge pipe of the compressor both resonate. Therefore, since the resonance point is displaced and the pipe stress can be relaxed, reliability and durability can be secured over time, and poor drying due to the slow leak of the refrigerant can be reduced.

  In the seventh invention, in particular, the resonance frequency of the pipe according to any one of the first to sixth inventions is different from the resonance frequency of the maximum amplitude of the water tank at the time of dehydration rising.

  As a result, even if the compressor of the heat pump unit resonates at the start of dehydration, the discharge part piping vibrates with the pipe inside the heat exchanger, so the resonance frequency of the pipe is shifted, and the discharge part piping hole and the pipe of the end plate are displaced. Without contact, the stress on the piping is not concentrated, and fatigue failure of the piping is reduced over time.

  Hereinafter, embodiments of the invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing / drying machine according to the present embodiment, FIG. 2 is a partial external perspective view of the washing / drying machine, and FIG. 3 is a heat pump disposed in a space above the housing of the washing / drying machine. It is a perspective view of the site | part which made the unit the main structure.

  1, 2, and 3, a water tank 2 is swingably disposed in the housing 1. A rotating drum 3 for storing laundry is rotatably disposed in the water tub 2. The rotating drum 3 is formed in a bottomed cylindrical shape, and a large number of water passage holes 42 are formed on the entire outer periphery. It is formed.

  The rotating drum 3 is provided with a rotating shaft 45 at the center of rotation, and the rotating shaft 45 is provided so as to be inclined downward from the front side to the back side of the rotating drum 3. A motor 7 attached to the rotating shaft 45 in the vicinity of the back side of the water tank 2 is connected to a large pulley 46 and a small pulley 48 via a belt 47, and the rotating drum 3 is rotated in the forward and reverse directions by the motor 7. Driven by rotation.

  On the inner wall surface of the rotating drum 3, there are provided a plurality of projection plates 6 for stirring clothes. By rotating the rotary drum 3 at a low speed, the clothes are hooked by the projection plates 6 and lifted upward. By giving a stirring operation (tumbling operation) for dropping at a high height, clothes are stirred and washed, and a drying operation is performed.

  The above-described rotating drum 3, water tank 2, motor 7 and the like constitute a vibrating water tank unit 51.

  An upward inclined surface is formed on the front surface of the housing 1, and an opening is formed on the upward inclined surface so as to face the front surface side of the water tank 2. A door body 5 is provided at the opening so as to be freely opened and closed. By opening the door body 5, the laundry can be taken in and out of the rotary drum 3 through the clothing entrance 53 of the water tank 2.

  The water tank unit 51 is supported in a vibration-proof manner by a vibration isolating member 54 below the housing 1 and an upper spring body 55, and one end of a drainage path 56 is connected to the lower part of the water tank 2. The other end of 56 is connected to a drain valve (drainage means) 57 so that the washing water in the water tank 2 is drained to the outside.

  The water tank 2 is provided with a water supply path 59 for supplying water into the water tank 2, and the water supply path 59 is provided with a water supply valve (water supply means) 58. The water supply valve 58 can open and close two or more water paths. It consists of multiple valves.

  The housing 1 is provided with an operation display unit 60 for performing operations such as selection of a washing course by the user at the upper front portion. Input from the operation display unit 60 is displayed on the input setting display unit 61. Display based on the input information of the unit 60.

  A top plate 62 is disposed on the top surface of the housing 1, and a control device 50 is disposed below the top plate 62. The control device 50 has an operating state set by input setting of the operation display unit 60, and based on data from a water level detecting means (not shown) for detecting the water level in the water tank 2, the motor 7, the drain valve 57, the water supply The operation of the valve 58 or the like is controlled, and each process such as washing, rinsing, dehydration, and drying processes is controlled.

The washing / drying machine of the present embodiment includes a drying device for drying clothes in the water tank 2. The drying device circulates the air in the water tank 2 and the rotating drum 3 through the blower 9. The air that has taken moisture from the laundry in the rotating drum 3 and has become humid is passed through a discharge port 11 provided in the upper side of the water tank 2 to the heat pump unit 30 disposed above the water tank 2. Discharged. The air circulated by the air blowing unit 9 is purified through the filter unit 40 outside the rotary drum 3. The filter unit 40 collects foreign matters such as lint, dust, and pollen mixed in the air passing through the rotary drum 3 and prevents foreign matters from entering the heat pump unit 30. The foreign matter accumulated in the filter unit 40 can be removed by attaching and detaching from the top plate 62 side of the upper part.

  The heat pump unit 30 includes a compressor 31 that compresses the refrigerant, an evaporator 125 that dissipates heat of the refrigerant that has been compressed by the compressor 31 and becomes high temperature and pressure, and a decompressor that reduces the pressure of the high temperature and pressure refrigerant. 120, a condenser 124 that draws heat from the surroundings by the reduced pressure and low pressure refrigerant, and a pipe 71 that connects these four members to circulate the refrigerant. 124 is dehumidified.

  The drying air dehumidified by the condenser 124 is heated by the evaporator 125. The heated drying air passes through the circulation air passage 8 from the air blowing unit 9 disposed in the middle of the circulation air passage 8 and is blown to the rear of the rotary drum 3 at the end of the circulation air passage 8. From the outlet 73, it blows out into the rotary drum 3 again, passes between the clothes, is led again to the discharge port 11, and circulates.

  The air blower 9 is provided downstream of the heat pump unit 30 and is configured to send the drying air heated by the evaporator 125 to the downstream side of the circulation air passage 8. And a fan motor 75 for blowing air.

  4 is a perspective view of the heat pump unit of the washing / drying machine according to the present embodiment, FIG. 5 is a sectional view of the heat pump unit, FIG. 6 is a front view of an end plate of the heat pump unit, and FIG. Sectional drawing around the piping of the unit, FIG. 8 is a front view of aluminum fins of the heat pump unit.

  Based on FIG.4, FIG.5, FIG.6, FIG.7 and FIG. 8, the structure of a heat pump unit is demonstrated. The heat pump unit 30 includes a compressor 31 that compresses a refrigerant, a heat exchanger (condenser) 124, a heat exchanger (evaporator) 125, and a decompressor 120 that decompresses high-pressure refrigerant. .

  The compressor 31, the heat exchanger (condenser) 124, the heat exchanger (evaporator) 125, and the decompressor 120 are unitized by a pipe line 71 constituted by brazed pipes, and the refrigerant passes through the pipe line 71. A circulating refrigeration cycle is constructed.

  The heat pump unit 30 is disposed above the water tank 2 in the housing 1, the refrigerant compressed to a high temperature and high pressure by the compressor 31 enters the evaporator 125 through the discharge pipe 114, and the surrounding air is circulated through the air circulation path. The air is heated by the drying air passing through the inside 8 and the evaporator 125, and the refrigerant is cooled and liquefied.

  The liquefied high-pressure refrigerant is decompressed by the decompressor 120 to become a low-temperature and low-pressure liquid refrigerant, enters the condenser 124 of the heat exchanger, exchanges heat with the surrounding air, dehumidifies and cools the air, and the refrigerant is heated. As a result, the refrigerant becomes vapor refrigerant and returns to the suction portion of the compressor 31 through the suction portion piping 111.

On the other hand, the drying air sent out by the blower 9 enters the rotary drum 3 through the water tank 2 and dries the clothes in the rotary drum 3 to enter the heat pump unit 30 as humid air. In the heat pump unit 30, the drying air is dehumidified and cooled in the condenser 124, and then flows into the evaporator 125 of the heat exchanger and is heated to become high-temperature and low-humidity air and returns to the blower unit 9.

  FIG. 7 is a cross-sectional view around the piping of the heat pump unit according to the embodiment of the present invention. FIG. 8 shows a front view of the cooling fin 102 of the heat pump unit.

  In the condenser 124 and the evaporator 125 of the heat exchanger, a large number of cooling fins 102 made of an aluminum plate or the like are arranged at regular intervals.

  The cooling fins 102 are formed by punching holes through which piping is passed in advance by pressing or the like, and the cooling fins 102 are arranged between the two opposing end plates 100 at a predetermined interval. After the pipe 112 is passed through the cooling fin 102 and the end plate 100, a pipe expansion jig is inserted from the inside of the pipe 112, and the pipe 112 is expanded from the inside to expand the pipe, so that the heat transfer coefficient is improved. 102 and the pipe 112 are brought into close contact with each other. A U-shaped tube 108 is inserted into the pipe 112 and connected to the pipe 112 by brazing so that the refrigerant can circulate in the pipe.

  Next, the formation of the refrigeration cycle as the heat pump unit will be described with reference to the cross-sectional view of the heat pump unit in FIG. 5 and the perspective view of the heat exchanger in FIG.

  Next, the discharge section piping 114 is brazed to the compressor 31 and the discharge section piping 114 of the compressor 31 is inserted into the expanded pipe discharge section 107 protruding from the discharge section piping hole 113 of the end plate 100 of the evaporator 125. And braze the boundaries of the piping.

  Next, the suction portion piping 111 of the compressor 31 is brazed to the suction portion 118 of the compressor 31, and the opposite side of the suction portion piping 111 protrudes from the suction portion piping hole 121 of the end plate 100 of the condenser 124. Insert into the expanded pipe 112 and braze the boundary of the pipe. Next, both the decompressor section pipes 119 of the decompressor 120 are brazed to the expanded pipe 112 protruding from the two decompressor section piping holes 123 of the end plate 100 of the condenser 124.

  After brazing all the pipes that form the refrigeration cycle, the refrigerant charge port 117 is evacuated by a vacuum pump, and after a predetermined amount of refrigerant has been added, the tip of the refrigerant charge port 117 is crushed and brazed, and finally, The refrigerant charge port 117 is bent by a vendor and accommodated in a case (not shown) of the heat pump unit 30.

  Here, the hole diameter D of the discharge part piping hole 113 of the end plate 100 of the evaporator 125 is formed to be 1 mm or more larger than the outer diameter d of the pipe discharge part 107 of the pipe 112. The diameter of the hole formed to be 1 mm or more larger than the pipe 112 is also formed to be large in the above-described suction part pipe hole 121 and the decompressor part pipe hole 123.

  The operation and action of the washing / drying machine configured as described above will be described below.

  As shown in FIG. 1, the washing and drying machine of the present embodiment has a configuration in which the heat pump unit 30 is disposed above the water tank 2.

  During the dehydration operation, the laundry is unbalanced in the rotating drum 3, and the water tank unit 51 may vibrate greatly. At this time, since the water tank unit 51 and the heat pump unit 30 are connected by the circulation air passage 8, the heat pump unit 30 also vibrates greatly.

When the heat pump unit 30 vibrates, piping that protrudes from the end plate 100, that is, the discharge portion piping 114, the suction portion piping 111, the decompressor portion piping 119, and the like vibrate.

  The hole through which the pipe 112 protruding from the end plate 100 through which the discharge pipe 114, the suction pipe 111, the decompressor pipe 119 and the like are connected is formed to be 1 mm or more larger than the pipe 112. Therefore, even if the discharge part pipe 114, the suction part pipe 111, the decompressor part pipe 119, and the like vibrate, stress does not concentrate on the pipe 112.

  FIG. 10 is the stress data of the pipe discharge unit 107 obtained in the experiment. As shown in FIG. 10, even if the rotation speed increases with the passage of time for dehydration, the resonance frequency of the water tank unit 51 is around 430 rpm. The stress can be improved without increasing the stress.

  In addition, when developing the product model, when the product capacity changes and the size of the rotating drum 3 changes, it is assumed that the resonance frequency of the water tank unit 51 that is a vibration system changes, but the heat pump unit 30 Are often shared for design standardization. Also in this case, since the hole of the end plate 100 is formed 1 mm or more larger than the pipe 112, stress concentration does not occur, and the reliability can be improved.

  As described above, in the present embodiment, the heat pump unit 30 is connected to the discharge port 114 of the end plate 100 of the evaporator 125 and connected to the discharge port 114 of the compressor 31. A gap between the discharge portion 107 and the discharge portion piping hole 113, a pipe 112 and a suction portion pipe that are connected to the suction portion piping 111 of the compressor 31 through the suction portion piping hole 121 of the end plate 100 of the condenser 124. A gap between the hole 121 and the pipe 112 and the pipe hole 123 for the pressure reducer that are connected to the pressure reducer part pipe 119 of the pressure reducer 120 through the pipe hole 123 for the pressure reducer part of the end plate 100 of the condenser 124. The gap is formed to be 1 mm or more.

  Thereby, it is possible to suppress the stress from being concentrated on the connection portion between the end plate 100 and the piping such as the refrigerant pipe of the heat pump unit 30 during the dehydration operation, and the reliability of the heat pump unit 30 can be improved.

  The water tank 2 and the heat pump unit 30 vibrate greatly due to imbalance, but since the pipe diameter does not contact the end plate 100 by making the hole diameter of the end plate 100 of the heat exchanger larger than the pipe 112, the contact point is a fulcrum. As a result, no stress is concentrated on the piping, and refrigerant leakage due to cracks does not occur in the piping.

  The hole diameter of the discharge portion piping hole 113 of the end plate 100 is made larger than that of the expanded pipe discharge portion 107.

  FIG. 11 is a stress characteristic diagram of the pipe discharge portion 107 in the vicinity of the end plate at the time of dehydration startup in the washing / drying machine having the conventional configuration. The strain gauge is attached to the pipe discharge portion 107 near the discharge portion piping hole 113 of the end plate 100 of the evaporator 125 to measure the stress. The horizontal axis represents the rotational speed of the rotary drum 3 and the vertical axis represents the pipe. The distortion of the discharge part 107 is shown.

  FIG. 10 is a stress characteristic diagram of the pipe discharge portion 107 in the vicinity of the end plate at the time of dehydration startup in the washing / drying machine according to the present embodiment. As in FIG. The distortion of the pipe discharge part 107 which expanded the pipe | tube of the heat exchanger near an end plate is shown on the axis | shaft.

  As shown in FIG. 11, in the washer / dryer having the conventional configuration, the discharge pipe 114 is vibrated greatly when the rotational speed of the rotary drum 3 is 430 rpm.

On the other hand, in the washing / drying machine of the present embodiment, as shown in FIG. 10, it can be seen that the stress on the discharge section piping 114 at 430 rpm is drastically reduced.

  Further, since the suction pipe 111 of the compressor 31 has a larger diameter than the pipe 112 of the expanded pipe 112 on the condenser 124 side, the diameter of the suction pipe 121 of the end plate 100 on the condenser 124 side is larger. Due to this vibration, the concentration of stress on the expanded pipe in the vicinity of the suction part piping hole 121 is suppressed, and the expanded pipe discharge part 107 and the expanded suction part piping hole 121 are expanded even if the compressor 31 vibrates greatly. Generation of cracks is suppressed.

  This embodiment in which the diameters of the discharge part piping hole 113, the suction part piping hole 121, and the pressure reducer part piping hole 123 are made larger than the diameter of the expanded pipe 112 will be described with reference to FIG.

  FIG. 6 shows the end plate 100 of the heat exchanger of the present embodiment. The discharge part piping hole 113, the suction part piping hole 121, and the decompressor part piping hole 123 are shown. When the heat pump unit 30 for starting up dehydration resonates, the compressor 31 and the decompressor 120 vibrate. However, by making the discharge port piping hole 113, the suction port piping hole 121, and the decompression unit piping hole 123 of the end plate 100 larger than the expanded piping 112, the heat pump is caused by vibration of the water tank 2 at the start of dehydration. Even if the unit vibrates, stress concentration in the piping can be suppressed, so that reliability can be improved.

  In addition, by making the hole diameter of a specific portion of the end plate 100 1 mm or more larger than the expanded pipe 112, even if the pipe vibrates due to vibration at the start of dehydration, the pipe contacts the end plate even if the pipe resonates. Therefore, concentration of stress on the piping can be suppressed and reliability can be improved.

  Moreover, since the hole diameter of the specific location of the end plate 100 is 10 mm or more, even when the heat pump unit 30 is disposed above the water tank 2 of the washing / drying machine, pipe vibration is assumed when pipe vibration at the time of dehydration rising is assumed. Can be optimized, and can be installed in a washer / dryer having different specifications, so that an optimum design for each model having different specifications can be eliminated.

  Furthermore, by making the hole diameter of the specific part of the end plate 100 10 mm or more, it is possible to absorb variations in manufacturing processes and parts, and even when vibration at the time of dehydration startup of the washing / drying machine is applied to the heat pump unit, Stress concentration on the piping is suppressed, and reliability can be improved over time.

  The end plate 100 has a diameter of at least the discharge part piping hole 113 of 10 mm or more, and the pipe integrated with the pipe discharge part 107 where the discharge part pipe 114 is expanded is integrated with the water tank 2 at the time of dehydration rising. The maximum resonance frequency is not matched.

  Since the discharge pipe 114 of the compressor 31, the pipe discharge section 107 expanded by the heat exchanger, and the cooling fin 102 vibrate together, the resonance frequency can be lowered, and the resonance frequency and the resonance frequency of the pipe can be shifted. As shown in FIG. 9, the discharge pipe 114 does not vibrate greatly even at a speed near the dehydration speed of 430 rpm, and a margin for the allowable stress of the pipe can be secured, and the heat pump unit 30 is optimized for each model. Standardization is possible as a common part.

  This eliminates the need to redevelop and optimize heat pump units when installing them in washers and dryers with different specifications, making it possible to respond to changes in various specifications and reducing development man-hours and standardization. Can be planned.

  This will be described with reference to the heat exchange cross-sectional view at the time of pipe resonance of the present embodiment in FIG.

  When the heat pump unit 30 resonates, the discharge section piping 114 from the compressor 31 vibrates as shown in FIG. By setting the diameter of at least the discharge part pipe hole 113 to 10 mm or more, the discharge part pipe 114 from the compressor 31 and the pipe discharge part 107 expanded in the heat exchanger move together, and the stress applied to the pipe is alleviated. The

  As described above, the washing / drying machine according to the present invention is equipped with a heat pump unit because it is possible to prevent stress concentration on the connection between the pipe such as the refrigerant pipe of the heat pump unit and the end plate during the dehydration operation. It can be applied to other washing machine applications such as commercial use.

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Water tank 3 Rotating drum 7 Motor 8 Circulating air path 9 Blower part 11 Outlet 30 Heat pump unit 31 Compressor 51 Water tank unit 71 Pipe line 73 Outlet 74 Blower fan 75 Fan fan motor 100 End plate 102 Cooling fin 107 Pipe discharge part 108 U-shaped pipe 111 Suction part pipe 112 Pipe 113 Discharge part pipe hole 114 Discharge part pipe 119 Pressure reducer part pipe 120 Pressure reducer 121 Suction part pipe hole 123 Pressure reducer part pipe hole 124 Condenser 125 Evaporator

Claims (7)

A housing, a water tub supported by the housing, a laundry tub rotatably accommodated in the water tub, and a laundry tub that accommodates laundry, the laundry tub disposed in the housing, and drying the laundry in the laundry tub A heat pump unit
The heat pump unit includes a heat exchanger, and the heat exchanger includes a plurality of cooling fins arranged in parallel, end plates disposed on both sides of the cooling fins, the cooling fins and the end plates. And a pipe that is expanded through a pipe, and the diameter of a specific portion of the end plate is set larger than the diameter of the pipe that is expanded. 2. The clothes dryer according to claim 1, wherein the diameter of the discharge pipe section piping hole of the end plate is made larger than the expanded pipe diameter. 2. The clothes dryer according to claim 1, wherein the diameter of the suction port piping hole of the end plate is made larger than the expanded pipe diameter. 2. The clothes dryer according to claim 1, wherein the diameter of the decompressor section piping hole of the end plate is made larger than the expanded pipe diameter. The clothes dryer according to any one of claims 1 to 4, wherein a hole diameter of the end plate is set to be 1 mm or more larger than the expanded pipe diameter. The clothes dryer according to any one of claims 1 to 4, wherein a hole diameter of the end plate is 10 mm or more. The clothes dryer according to any one of claims 1 to 6, wherein a resonance frequency of the pipe is different from a resonance frequency of the maximum amplitude of the water tank at the time of dehydration rising.

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