WO2023071907A1

WO2023071907A1 - Drum-type integrated washer/dryer

Info

Publication number: WO2023071907A1
Application number: PCT/CN2022/126412
Authority: WO
Inventors: 辻贵裕
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社; 海尔智家股份有限公司
Priority date: 2021-10-26
Filing date: 2022-10-20
Publication date: 2023-05-04
Also published as: JP2023064236A; CN116438347A

Abstract

A drum-type integrated washer/dryer (1), comprising: a first heat exchanger (130) and a second heat exchanger (140) are accommodated in a second pipeline (113), and are arranged in a space (S1) which is enclosed by a top surface (10a) and a right side surface (10b) of a box body (10) and by a peripheral wall (201) of an outer drum (20), the dimensions of the space (S1) increasing in an up/down direction from a top portion (201a) of the peripheral wall (201) towards the right side surface (10b); the dimensions of the first heat exchanger (130) and of the second heat exchanger (140) in an up/down direction increase from the top portion (201a) of the peripheral wall (201) towards the right side surface (10b), allowing refrigerant pipes (131a, 141a) of the first heat exchanger (130) and second heat exchanger (140) to snake in an in-plane direction parallel to the radial direction of the outer drum (20). The present drum-type integrated washer/dryer allows for increasing the dimensions of heat exchangers while preventing an increase to the size of a box body.

Description

Drum type washing and drying machine

technical field

The invention relates to a drum type washing and drying machine.

Background technique

The following patent document 1 describes a drum-type washing and drying machine, which includes: an outer cylinder; an air circulation path with a take-out port and a return port connected to the outer cylinder; The outlet is taken out into the air circulation path and returned to the outer cylinder from the return port, thereby circulating the air; and a heat exchanger is installed in the air circulation path to conduct heat between the refrigerant and the air in the air circulation path. exchange.

In this drum-type washer-dryer, the air circulation path includes a middle portion extending in the front-rear direction at a position higher than the outer tub. Furthermore, the heat exchanger includes a first heat exchanger arranged downstream of the rotating blades of the air blower in the middle portion, and a second heat exchanger arranged downstream of the first heat exchanger. The first heat exchanger and the second heat exchanger are arranged in a front-rear direction.

The box body has a square box shape, while the outer cylinder has a cylindrical shape, and both end surfaces face the front-rear direction. Therefore, between the upper side of the peripheral surface wall of the outer cylinder and the top surface of the box, a large space is formed at the side surfaces of the box closer to the center than the center when viewed from the front of the box. In the above-mentioned integrated washer-dryer, the heat exchanger housed in the middle portion is arranged in the space.

In a drum-type washer-dryer, generally, the overall shape of the heat exchanger arranged in the air circulation path has a rectangular parallelepiped shape. Therefore, when the rectangular parallelepiped heat exchanger is arranged in the space, an ineffective space is likely to be generated below the heat exchanger in the portion on the side of the space. Therefore, when the heat exchanger is made large in order to improve the heat exchange performance, the box tends to be enlarged while remaining a dead space.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2021-23720

Contents of the invention

The problem to be solved by the invention

This application was made in view of this problem, and it aims at providing the integrated drum type washer-dryer which can suppress the size increase of a housing|casing and can make a heat exchanger large.

solutions to problems

The drum-type washing and drying machine according to the main aspect of the present invention includes: a square box-shaped box; an outer cylinder arranged in the box and having a cylindrical peripheral wall; a drum arranged in the outer cylinder, accommodating laundry; and a drying device for drying the laundry in the drum. Wherein, the drying device is equipped with: a circulation path connected to the outer cylinder, and air circulates between the circulation path and the outer cylinder; The flat refrigerant pipes of the circulation path and the heat transfer fins connected to the refrigerant pipes perform heat exchange between the air flowing through the circulation path and the refrigerant. The heat exchanger is housed in the circulation path, and is arranged in a space surrounded by the top surface and side surface of the box and the peripheral wall, and the dimension in the vertical direction increases from the top side of the peripheral wall. In the space that expands from the side to the side. The refrigerant pipe is arranged in a plane parallel to the radial direction of the outer cylinder so that the vertical dimension of the heat exchanger increases from the top side of the peripheral wall toward the side surface side. meandering direction.

According to the above configuration, since the heat exchanger can be formed in a shape corresponding to the shape of the space in which the heat exchanger is arranged, it is difficult to generate an ineffective space below the heat exchanger at the side surface of the space. Therefore, it is possible to suppress an increase in the size of the tank and make the heat exchanger large.

In the drum-type washer-dryer integrated machine of this solution, the following structure can be adopted: the refrigerant pipe meanders in the up and down direction, and the meandering amplitude becomes larger as it goes from the top side of the peripheral wall to the side part side .

According to the above configuration, the heat exchanger can be formed so that the dimension in the vertical direction increases from the top side of the peripheral wall toward the side surface side.

In the case of adopting the above configuration, the heat exchanger may further have a configuration in which a low-temperature refrigerant flows through the refrigerant pipes, cools air flowing through the circulation path, and dehumidifies the air.

According to the above configuration, since the refrigerant pipes meander vertically, water condensed on the refrigerant pipes and heat transfer fins tends to move downward and flow to the bottom of the circulation path during dehumidification from the air.

In the case of adopting the above structure, furthermore, the heat exchanger may have a structure including two heads connected to both ends of the refrigerant pipe. In this case, a structure may be employed in which one of the two heads is provided with a refrigerant inlet, and the other is provided with a refrigerant outlet, and the refrigerant pipe meanders from one end of the refrigerant pipe in the vertical direction. And after extending in a predetermined direction, it is folded back, and extends in a direction opposite to the predetermined direction, and the other end of the refrigerant pipe is located near the one end.

According to the above-mentioned structure, the head with the inlet of the refrigerant and the head with the outlet of the refrigerant can be placed close to each other, so the pipes for sending the refrigerant to the heat exchanger and the pipes for sending the refrigerant back from the heat exchanger are connected to the inlet and the outlet, respectively. Connected jobs made easy.

In the drum-type washer-dryer of this solution, the following structure may be adopted: the refrigerant pipe meanders along the horizontal direction, and the meandering amplitude becomes larger as it goes from the side of the peripheral wall to the side of the top face.

In the drum-type washer-dryer integrated machine of this solution, the heat exchanger may adopt the following structure, that is, it includes: a first heat exchanger, which allows the low-temperature refrigerant to flow in the refrigerant pipe and convectively flows through the circulation path The air is cooled and dehumidified from the air; and the second heat exchanger makes high-temperature refrigerant flow in the refrigerant pipe to heat the air flowing through the circulation path. In this case, the first heat exchanger and the second heat exchanger may have a structure in which a heat exchange unit composed of the refrigerant pipe and the heat transfer fins is arranged along the axial direction of the outer cylinder arrangement. Furthermore, the number of the heat exchange units of the second heat exchanger may be greater than the number of the heat exchange units of the first heat exchanger.

According to the above structure, since the second heat exchanger has higher heat exchange performance than the first heat exchanger, the air cooled by the first heat exchanger due to dehumidification can be sufficiently heated by the second heat exchanger.

Invention effect

According to the present invention, it is possible to provide a drum-type washer-dryer capable of suppressing an increase in the size of the housing and having a large heat exchanger.

The effect and significance of this invention will become clearer by description of embodiment shown below. However, the following embodiments are merely examples for implementing the present invention, and the present invention is not limited by the contents described in the following embodiments.

Description of drawings

Fig. 1 is a side sectional view schematically showing the structure of a drum-type washer-dryer according to an embodiment.

In Fig. 2, (a) is a perspective view of the outer cylinder to which the drying device is attached according to the embodiment viewed from the upper rear. (b) is a perspective view of the main part of the outer cylinder showing the periphery of the exhaust port according to the embodiment.

Fig. 3 is a plan view of the second duct in the state where the upper shell is removed, in which the first heat exchanger and the second heat exchanger are arranged according to the embodiment.

4 is a cross-sectional view of the second pipe in which the first heat exchanger and the second heat exchanger are arranged according to the embodiment, taken along the front-rear direction at the position of the drainage recess.

In FIG. 5 , (a), (b) and (c) are a perspective view, a top view, and a bottom view of the first heat exchanger according to the embodiment, respectively.

In Fig. 6, (a), (b) and (c) are a perspective view, a plan view and a bottom view of the second heat exchanger according to the embodiment, respectively.

Fig. 7 is a perspective view of the lower case of the embodiment.

In Fig. 8, (a) is a front cross-sectional view of the upper right part of the drum-type washer-dryer cut at the position of the first heat exchanger of the embodiment, and (b) is a front sectional view of the second heat exchanger of the embodiment. Front sectional view of the upper right side of the tumble washer-dryer cut in position.

Explanation of reference signs

10: box body; 10a: top surface; 10b: right side surface; 20: outer cylinder; 23: drum; 100: drying device; 110: circulation path; 130: first heat exchanger; 131: heat exchange unit; 131a: refrigerant pipe; 131b: heat transfer fin; 132: head; 133: inlet; 134: outlet; 140: second heat exchanger; 141: heat exchange unit; 141a: refrigerant pipe; 141b: heat transfer fin ; 201 : peripheral wall; 201 a : top; S1 : space.

Detailed ways

Hereinafter, one embodiment of the integrated drum-type washer-dryer of the present invention will be described with reference to the drawings.

FIG. 1 is a side sectional view schematically showing the structure of a drum-type washer-dryer 1 . (a) of FIG. 2 is a perspective view of the outer cylinder 20 to which the drying device 100 is attached viewed from the upper rear. (b) of FIG. 2 is a perspective view of main parts of the outer cylinder 20 showing the periphery of the exhaust port 203 .

The drum-type washer-dryer 1 includes a box-shaped box 10 . A circular inlet 11 into which laundry is injected is formed on the front surface of the housing 10 . The inlet 11 is covered with a freely openable door 12 .

An outer cylinder 20 is arranged inside the box body 10 . The outer cylinder 20 is elastically supported by a plurality of dampers 21 and springs 22 . The outer cylinder 20 has a cylindrical peripheral wall 201 and a disk-shaped rear wall 202 . A drum 23 is rotatably arranged inside the outer cylinder 20 . The drum 23 rotates about a horizontal axis L. As shown in FIG. The drum 23 has a circular opening 23a on the front surface. The outer cylinder 20 has a circular opening 20 a connected to the inlet 11 via a not-shown gasket in front of the opening 23 a of the drum 23 . In addition, if the drum 23 is a horizontal axis type, it may rotate about the axis|shaft inclined.

Many dehydration holes 23b are formed in the peripheral surface wall of the drum 23. As shown in FIG. Moreover, in the drum 23, the lifting rib 24 for lifting laundry is provided in the peripheral surface wall.

Drive motor 30 for generating torque for rotating drum 23 is disposed behind outer cylinder 20 . The drive motor 30 is, for example, an outer rotor type DC brushless motor. The driving motor 30 rotates the drum 23 at a rotational speed at which the centrifugal force applied to the laundry in the drum 23 is smaller than the gravity and the laundry will tumble during the washing process and the rinsing process. On the other hand, the drive motor 30 rotates the drum 23 at a rotational speed at which the centrifugal force applied to the laundry in the drum 23 is much greater than gravity and the laundry sticks to the peripheral wall of the drum 23 during the dehydration process.

A drain port 20b is formed at the bottom of the outer cylinder 20 . A drain passage 40 composed of a drain hose or the like is connected to the drain port 20b. A drain valve 41 and a drain filter 42 are provided in the drain path 40 . The drain valve 41 includes, for example, a valve body and a torque motor that opens and closes the valve body. When the drain valve 41 is opened, the water stored in the outer cylinder 20 is discharged out of the machine through the drain 40 . Foreign substances such as lint contained in the drainage are captured by the drainage filter 42 .

The water supply part 50 is arrange|positioned in the upper part in the case 10. As shown in FIG. The water supply unit 50 includes a water supply valve 51 and a water supply hose 52 . One end of the water supply hose 52 is connected to the water supply valve 51 , and the other end is connected to the water injection port 20 c provided on the rear wall 202 of the outer cylinder 20 . When the water supply valve 51 is opened, tap water from the faucet flows through the water supply hose 52 and is supplied into the outer cylinder 20 from the water inlet 20c.

A drying device 100 for drying the laundry in the drum 23 by heated air is arranged in the upper part of the box body 10 . The drying device 100 includes a circulation path 110 , an air blower 120 , a first heat exchanger 130 , and a second heat exchanger 140 .

The circulation path 110 is an air path through which air flows, and is connected to the outer cylinder 20 . The circulation path 110 includes a first duct 111 , a fan case 112 , a second duct 113 and an introduction duct 114 .

As shown in (b) of FIG. 2 , an exhaust port 203 is provided at the rear portion of the peripheral wall 201 of the outer cylinder 20 and at a portion above the center of the outer cylinder 20 . The exhaust port 203 has a rounded rectangle that is long in the front-rear direction, that is, in the axial direction of the outer cylinder 20 . It should be noted that many ribs for reinforcement are provided in a lattice shape on the outer surface side of the peripheral surface wall 201 and the rear surface wall 202 .

As shown in FIG. 2( a), the first duct 111 is disposed on the peripheral wall 201 at the rear of the outer cylinder 20 and is connected to the exhaust port 203, from the exhaust port 203 along the peripheral wall 201 to the top side of the peripheral wall 201. extend. The fan case 112 is arranged above the peripheral wall 201 at the rear of the outer tube 20 and above the first duct 111 on the right side of the top of the peripheral wall 201 .

The fan case 112 is formed in a flat hollow cylindrical shape, has a suction port on the lower surface, and has a discharge port on the peripheral surface. The first pipe 111 is connected to the suction port of the fan casing 112 via a flexible connection hose 115 .

The second duct 113 has a box shape elongated in the front-rear direction, and is disposed above the peripheral wall 201 and in front of the fan case 112 on the right side of the top of the peripheral wall 201 . The rear end of the second duct 113 is connected to the outlet of the fan casing 112 . The introduction pipe 114 extends from the front end of the second duct 113 and is connected to the suction port 204 formed in the upper front portion of the outer cylinder 20 . The introduction pipe 114 is composed of a first pipe 114 a integrally formed with the second duct 113 and a second pipe 114 b made of rubber material and connecting the first pipe 114 a to the suction port 204 . A drain hose 116 is connected to the bottom of the second pipe 113 for discharging the water cooled and warmed from the air by the first heat exchanger 130 . The drain hose 116 is connected to the outer cylinder 20 via a connection hose not shown.

The air blower 120 is, for example, a centrifugal fan, and includes a fan 121 accommodated in the fan casing 112 and a motor 122 for rotationally driving the fan 121 . Air blower 120 circulates air between outer cylinder 20 and circulation path 110 . The air discharged from the outer cylinder 20 through the exhaust port 203 flows through the circulation path 110 in the order of the first duct 111 , the fan casing 112 , the second duct 113 , and the introduction pipe 114 , and returns to the outer cylinder 20 through the air inlet 204 Inside. An air blowing unit is constituted by the air blower 120 and the fan case 112 .

The first heat exchanger 130 and the second heat exchanger 140 are respectively arranged on the upstream side and the downstream side in the second pipe 113 which is their housing. The first heat exchanger 130 and the second heat exchanger 140 are each included in the heat pump device. The heat pump device includes a compressor, an expansion valve, and the like that form a cooling and heating circuit together with the first heat exchanger 130 and the second heat exchanger 140 .

Low-temperature refrigerant flows inside first heat exchanger 130 . The first heat exchanger 130 cools the air flowing through the second pipe 113 , that is, the circulation path 110 , through heat exchange with a low-temperature refrigerant, and dehumidifies the air. That is, the first heat exchanger 130 functions as a cooler.

High-temperature refrigerant flows inside second heat exchanger 140 . The second heat exchanger 140 heats the dehumidified air flowing through the second pipe 113 , that is, the circulation path 110 , through heat exchange with a high-temperature refrigerant. That is, the second heat exchanger 140 functions as a heater.

FIG. 3 is a plan view of the second duct 113 in a state where the first heat exchanger 130 and the second heat exchanger 140 are arranged and the upper case 302 is removed. FIG. 4 is a cross-sectional view of the second duct 113 in which the first heat exchanger 130 and the second heat exchanger 140 are disposed, taken along the front-rear direction at the position of the drain recess 313 . 5( a ) is a perspective view of the first heat exchanger 130 , FIG. 5( b ) is a top view of the first heat exchanger 130 , and FIG. 5( c ) is a bottom view of the first heat exchanger 130 . 6( a ) is a perspective view of the second heat exchanger 140 , FIG. 6( b ) is a top view of the second heat exchanger 140 , and FIG. 6( c ) is a bottom view of the second heat exchanger 140 . FIG. 7 is a perspective view of the lower case 301 .

Referring to FIG. 3 to FIG. 7 , the structures of the second pipe 113 , the first heat exchanger 130 and the second heat exchanger 140 will be described in detail.

The second duct 113 is constituted by combining a lower case 301 with an open upper surface and an upper case 302 with an open lower surface. The second duct 113 is made of resin material and includes a bottom wall 303 , a top wall 304 , a front wall 305 , a rear wall 306 , a right side wall 307 and a left side wall 308 .

The bottom wall 303 has a shape in which the right end is substantially horizontal and the left side of the right end is inclined upward toward the left end. A rectangular inflow port 309 long in the left-right direction is formed in the rear side wall 306 . The discharge port of the fan case 112 is connected to the inlet port 309 . An outflow port 310 having an elongated shape in the left-right direction is formed in the front side wall 305 . The first pipe 114 a of the introduction pipe 114 integrally formed with the second pipe 113 is connected to the outflow port 310 . The air sent from the fan housing 112 flows through the second duct 113 from the rear to the front.

Inside the second duct 113, the first heat exchanger 130 is arranged in the rear arrangement area 320 which is the upstream side, and the second heat exchanger 140 is arranged in the front arrangement area 330 which is the downstream side. The first heat exchanger 130 and the second heat exchanger 140 are arranged linearly in the front-rear direction in a state close to each other.

As shown in (a)-(c) of FIG. 132 heads. The first heat exchanger 130 is a so-called microchannel heat exchanger.

Each heat exchange unit 131 includes a refrigerant pipe 131a and a plurality of heat transfer fins 131b. The refrigerant tubes 131a and the heat transfer fins 131b are formed of a material having excellent thermal conductivity such as aluminum.

The refrigerant pipe 131a is a flat pipe having a plurality of small refrigerant flow paths arranged in the width direction inside, and the refrigerant flows through the refrigerant flow paths. The refrigerant pipe 131a has a structure in which one end of the refrigerant pipe 131a meanders in the vertical direction and extends rightward, then folds back, and the upper side of the meandering portion linearly extends leftward. The other end of the refrigerant pipe 131a is located in the vicinity above one end of the refrigerant pipe 131a. As the refrigerant pipe 131a goes from the left side to the right side, the meandering amplitude of the refrigerant pipe 131a becomes larger, and the position of the lower end thereof is lower.

The plurality of heat transfer fins 131b have a corrugated shape, are arranged in gaps formed between the meandering refrigerant pipes 131a, and are connected to the refrigerant pipes 131a.

The two heads 132 are connected to both ends of the three refrigerant pipes 131a. Each head portion 132 has an elongated cylindrical shape, and the inside thereof serves as a flow path of the refrigerant. Inside the upper head portion 132 , wall portions 132 a closing the interior are provided at positions between both end portions and between the first and second heat exchange units 131 counted from the front. Furthermore, a refrigerant inlet 133 is provided on the front side of the upper head portion 132 . Inside the lower head portion 132 , wall portions 132 a closing the inside are provided at positions between both end portions and between the first and second heat exchange units 131 counted from the rear. Furthermore, a refrigerant outlet 134 is provided on the rear side of the lower head portion 132 .

Three heat exchange units 131 , that is, refrigerant pipes 131 a are connected in series by two heads 132 . Therefore, as shown by the arrows in (b) and (c) of FIG. 5 , the refrigerant flowing into the upper head portion 132 from the inlet 133 flows from the front refrigerant pipe 131a to the rear refrigerant pipe 131a, and flows from the lower side to the rear refrigerant pipe 131a. An outlet 134 of the head 132 exits.

As shown in (a)-(c) of FIG. 142 heads. The second heat exchanger 140 is a so-called microchannel heat exchanger.

Each heat exchange unit 141 includes a refrigerant pipe 141a and a plurality of heat transfer fins 141b. The refrigerant tubes 141a and the heat transfer fins 141b are formed of a material having excellent thermal conductivity such as aluminum.

The refrigerant pipe 141a is a flat pipe having a plurality of small refrigerant flow paths arranged in the width direction inside, and the refrigerant flows through the refrigerant flow paths. The refrigerant pipe 141a has a structure meandering in the left-right direction. As it goes from the lower side to the upper side, the meandering swing of the refrigerant pipe 141a becomes larger, and the position of the end thereof is further to the left.

The plurality of heat transfer fins 141b have a corrugated shape, are arranged in gaps formed between the meandering refrigerant pipes 141a, and are connected to the refrigerant pipes 141a. A heat transfer plate 145 is connected below the lowermost heat transfer fin 141b.

The two heads 142 are connected to both ends of the four refrigerant pipes 141a. Each head 142 has an elongated cylindrical shape, and the inside thereof serves as a flow path of the refrigerant. Inside the head portion 142 on the upper side, at the positions of both ends, the position between the first and second heat exchange units 141 from the front, and the first and second heat exchange units from the rear 141, there is provided a wall portion 142a that closes the interior. Furthermore, in the upper head portion 142, a refrigerant inlet 143 is provided on the front side, and a refrigerant outlet 144 is provided on the rear side. Inside the lower head portion 142 , wall portions 142 a closing the interior are provided at positions between both ends and between the second and third heat exchange units 141 from the front.

Four heat exchange units 141 , that is, refrigerant pipes 141 a are connected in series by two heads 142 . Therefore, as shown by the arrows in (b) and (c) of FIG. 6, the refrigerant flowing into the upper head 132 from the inlet 143 flows from the front refrigerant pipe 141a to the rear refrigerant pipe 141a, and from the upper An outlet 144 of the head 142 exits.

The front shapes of the first heat exchanger 130 and the second heat exchanger 140 correspond to the front cross-sectional shape of the second pipe 113 .

As shown in FIG. 3 , inside the second duct 113 , on the right side of the two

arrangement areas

320 , 330 , there is provided an accommodation portion 312 partitioned by a partition wall 311 extending in the front-rear direction. The lower part of the partition wall 311 is formed in the lower case 301 , and the upper part is formed in the upper case 302 .

A delivery pipe 181 and a return pipe 182 respectively extending from a discharge port and a suction port of the not-shown compressor are introduced into the housing portion 312 . The delivery pipe 181 is connected to the inlet 143 of the second heat exchanger 140 . The return pipe 182 is connected to the outlet 134 of the first heat exchanger 130 .

A connecting pipe 184 having a capillary 183 as an expansion valve is arranged in the housing portion 312 . The inlet of the connecting pipe 184 is connected to the outlet 144 of the second heat exchanger 140 , and the outlet of the connecting pipe 184 is connected to the inlet 133 of the first heat exchanger 130 .

The refrigerant compressed by the compressor to become high temperature is supplied to the second heat exchanger 140 through the delivery pipe 181 , and flows through the four refrigerant pipes 141 a of the second heat exchanger 140 . Thereby, the second heat exchanger 140 becomes high temperature. The refrigerant flowing out of the second heat exchanger 140 is decompressed and becomes low temperature when passing through the capillary 183 in the connection pipe 184 . The low-temperature refrigerant is supplied to the first heat exchanger 130 and flows through the three refrigerant pipes 131 a of the first heat exchanger 130 . Thereby, the first heat exchanger 130 becomes low temperature. The refrigerant flowing out of the first heat exchanger 130 returns to the compressor through the return pipe 182 .

As shown in FIG. 7 , inside the second pipe 113 , in the arrangement area 320 of the first heat exchanger 130 , there is provided a pipe protruding from the lower part of the partition wall 311 so as to approach the left end of the first heat exchanger 130 . Cuboid protrusion 321 . In addition, in the arrangement area 320 , a drainage groove 322 is formed in the horizontal portion of the bottom wall 303 across the arrangement area 320 in the front-rear direction. The drain groove 322 is inclined downward toward the front.

In the arrangement area 320 , the bottom wall 303 is provided with four bottom ribs 323 extending in the left-right direction between the protruding portion 321 and the right side wall 307 at intervals in the front-rear direction. In addition, four side ribs 324 extending in the vertical direction and having lower ends connected to the bottom rib 323 are provided on the right side wall 307 . Furthermore, four supporting ribs 325 extending from the side surfaces of the protruding portion 321 to the upper surface and having lower ends connected to the bottom rib 323 are provided on the protruding portion 321 .

Portions of the three rear bottom ribs 323 corresponding to the inclined portions of the bottom wall 303 have a stepped shape. The frontmost and rearmost bottom ribs 323 are interrupted by a part of the drain groove 322 . The middle two bottom ribs 323 are interrupted over a large extent of the horizontal portion of the bottom wall 303 including a part of the drain groove 322 . The right side depressions of the four supporting ribs 325 are half U-shaped.

In the arrangement area 320 , between the two front and rear bottom ribs 323 and on the right and left sides of the drain groove 322 in the horizontal portion of the bottom wall 303 , low placement ribs 326 extending in the left-right direction are formed.

Each heat exchange unit 131 of the first heat exchanger 130 is sandwiched between two front and rear bottom ribs 323 , side ribs 324 , and support ribs 325 . Accordingly, the movement of the first heat exchanger 130 in the front-back direction is restricted. In addition, each heat exchange unit 131 of the first heat exchanger 130 is placed on the placement rib 326 , and the two heads 132 are supported by the support rib 325 . As a result, a gap is created between the first heat exchanger 130 and the bottom wall 303 .

Inside the second pipe 113 , in front of the first heat exchanger 130 , that is, downstream, a protective wall 340 is provided so as to be close to the first heat exchanger 130 . The protective wall 340 extends in the left-right direction along the bottom wall 303 of the second duct 113 , that is, in the direction perpendicular to the air flow in the second duct 113 , and connects the first heat exchanger 130 and the first heat exchanger 130 from the downstream side of the first heat exchanger 130 . The gaps between the bottom walls 303 overlap.

The protective wall 340 is constituted by the front bottom rib 323 and the gasket 341 covering the bottom rib 323 from above. The gasket 341 is formed of an elastic material such as rubber into a shape corresponding to the bottom rib 323 and has the same length in the left-right direction as the bottom rib 323 .

Inside the second duct 113 , in front of the drain groove 322 , a drain recess 313 is provided by denting the bottom wall 303 . The drain recess 313 is located on the downstream side of the protective wall 340 and on the upstream side of the arrangement area 330 of the second heat exchanger 140 . The drain groove 322 is connected to the drain recess 313 . In the drain recess 313 , a cylindrical drain port 314 is formed at the lower portion of the rear wall. A drain hose 116 is connected to the drain port 314 . Furthermore, in the drainage recessed part 313, the cylindrical inlet 315 is formed in the lower part of the front wall (refer FIG. 4).

As shown in FIG. 7 , in the arrangement area 330 of the second heat exchanger 140 , the inclined portion of the bottom wall 303 has a stepped shape. In the arrangement area 330 , the bottom wall 303 is provided with five bottom ribs 331 extending in the left-right direction between the partition wall 311 and the right side wall 307 at intervals in the front-rear direction. In addition, five side ribs 332 extending in the vertical direction and having lower ends connected to bottom ribs 331 are provided on the right side wall 307 . A portion of each bottom rib 331 corresponding to the inclined portion of the bottom wall 303 has a stepped shape.

Each heat exchange unit 141 of the second heat exchanger 140 is sandwiched between two front and rear bottom ribs 331 and side ribs 332 . Accordingly, the movement of the second heat exchanger 140 in the forward and backward directions is restricted. In addition, each heat exchange unit 141 of the second heat exchanger 140 is mounted on the bottom wall 303 , and the two heads 142 are supported by the four bottom ribs 331 on the rear side.

In the arrangement area 330 , a recess 333 of a predetermined shape is formed in a horizontal portion of the bottom wall 303 . The three bottom surface ribs 331 in the middle are interrupted by the portion where the concave portion 333 is formed. A drain portion 334 is provided at the frontmost portion of the recessed portion 333 . The drain portion 334 includes a drain recess 335 formed by denting the bottom wall 303 , and a cylindrical drain port 336 formed at the lower portion of the rear wall of the drain recess 335 .

As shown in FIG. 4 , the drain port 336 and the inlet port 315 are connected by a connecting pipe 350 . Accordingly, the drain port 336 , that is, the drain recess 335 is connected to the drain hose 116 via the connection pipe 350 and the drain recess 313 . Thereby, the drain part 334 can share the drain hose 116 with the drain recessed part 313 .

(a) of FIG. 8 is a front cross-sectional view of the upper right part of the drum-type washer-dryer 1 cut at the position of the first heat exchanger 130 . (b) of FIG. 8 is a front cross-sectional view of the upper right part of the drum-type washer-dryer 1 cut at the position of the second heat exchanger 140 .

The fan case 112 and the second duct 113 are fixed to the casing 10 via an unillustrated mounting member. The second duct 113 is inclined such that a part of the bottom wall 303 follows the peripheral wall 201 of the outer cylinder 20 . A predetermined interval is provided between the bottom wall 303 and the peripheral wall 201 so that the outer cylinder 20 does not come into contact with the second duct 113 when vibrating during dehydration or the like. In addition, since the vibration of the outer cylinder 20 is absorbed by the connection hose 115 and the second pipe 114b, it is less likely to be transmitted to the fan case 112 and the second duct 113 .

The first heat exchanger 130 and the second heat exchanger 140 are housed in the second duct 113 and arranged in a space S1 surrounded by the top surface 10 a , right side surface 10 b and the peripheral wall 201 of the case 10 . The space S1 has a nearly triangular shape in a front view, and its vertical dimension increases from the top 201a side of the peripheral wall 201 to the right side surface 10b side.

As shown in FIG. 8( a ), in the first heat exchanger 130 , the refrigerant pipe 131 a increases in size in the vertical direction of the first heat exchanger 130 as it goes from the top 201 a side of the peripheral wall 201 to the right side surface 10 b side. The enlarged form meanders in the up-down direction which is an in-plane direction parallel to the radial direction of the outer cylinder 20 . Specifically, the refrigerant pipe 131a is disposed such that its meandering width becomes larger as it goes from the top 201a side of the peripheral wall 201 to the right side surface 10b side, and the position of the lower end thereof is lower. Accordingly, the first heat exchanger 130 has a substantially triangular shape in front view, similar to the shape of the space S1 in which the first heat exchanger 130 is disposed. Thus, unlike the case where the first heat exchanger 130 has a rectangular parallelepiped shape shown by the dashed-dotted line in FIG. A dead space is generated below the , and accordingly, the first heat exchanger 130 can be made larger without enlarging the tank 10 .

As shown in FIG. 8( b ), in the second heat exchanger 140 , the size of the refrigerant pipe 141 a in the vertical direction of the second heat exchanger 140 increases from the top 201 a side of the peripheral wall 201 to the right side surface 10 b side. The enlarged form meanders in the horizontal direction which is the horizontal direction which is the in-plane direction parallel to the radial direction of the outer cylinder 20 . Specifically, the refrigerant pipe 141a is disposed such that its meandering width becomes larger as it goes from the peripheral wall 201 to the top surface portion 10a side, and the left end thereof is positioned further to the left. Accordingly, the second heat exchanger 140 has a substantially triangular shape in front view, similar to the shape of the space S1 in which the second heat exchanger 140 is disposed. Thus, unlike the case where the second heat exchanger 140 has a rectangular parallelepiped shape shown by the dashed line in FIG. A dead space is generated below the , and accordingly, the second heat exchanger 140 can be made larger without enlarging the tank 10 .

In addition, the washing and drying operation, washing operation, or drying operation in various operation modes is performed in the drum-type washer-dryer 1 . In the washing and drying operation, a washing process, an intermediate dehydration process, a rinsing process, a final dehydration process, and a drying process are sequentially performed. During the washing operation, the drying process is not performed from the washing process to the final dehydration process. In the drying operation, only the drying process is performed. Depending on the operation mode, the rinsing process and the intermediate spin process may be performed twice or more.

During the cleaning process, water containing detergent is stored in the outer tub 20 up to a predetermined water level corresponding to the load of the laundry contained in the drum 23, and the drum 23 is repeatedly rotated in the forward direction and in the reverse direction. Laundry immersed in this water is tumbled. The water containing detergent penetrates into the laundry, and through the power of the detergent and the mechanical force of tumbling, the stains attached to the surface and inside of the laundry are removed.

In the rinsing process, the drum 23 rotates forward and reverse while storing water in the outer tub 20 to a predetermined water level, and the laundry is tumbled. Thereby, the detergent contained in the laundry is discharged together with the water, and the laundry is rinsed.

During the intermediate dehydration process and the final dehydration process, the drive motor 30 rotates at a high speed in one direction, and the drum 23 rotates in one direction at a rotational speed at which the centrifugal force acting on the laundry in the drum 23 is much greater than the gravity. The laundry is pressed against the peripheral wall surface of the drum 23 by the centrifugal force and dehydrated. During the final dehydration process, the drum 23 rotates at a higher rotational speed than during the intermediate dehydration process.

During the drying process, air circulates between the outer cylinder 20 and the circulation path 110 through the operation of the blower 120 , and the air introduced into the outer cylinder 20 is heated to become hot air through the operation of the second heat exchanger 140 . Furthermore, drum 23 rotates forward and reverse, and the laundry is tumbled.

The hot air introduced into the tub 20 from the suction port 204 contacts the tumbled laundry to dry the laundry. The hot air deprived of moisture from the laundry returns to the circulation path 110 through the exhaust port 203 .

In the circulation path 110 , the hot air passes through the first heat exchanger 130 before being heated by the second heat exchanger 140 , and is dehumidified by the first heat exchanger 130 . At this time, the water condensed from the air condenses on the refrigerant pipe 131a and the heat transfer fins 131b of the first heat exchanger 130, and the condensed water moves downward along the heat transfer fins 131b and falls to the first heat exchanger. The lower bottom wall 303 of the exchanger 130 . The water falling into the bottom wall 303 flows to the drain groove 322 through the gap between the first heat exchanger 130 and the bottom wall 303 , and flows into the drain recess 313 through the drain groove 322 . The water that has flowed into the drain recess 313 is drained from the drain port 314 , and is drained into the outer cylinder 20 through the drain hose 116 .

It should be noted that, in the first heat exchanger 130 , the refrigerant pipe 131 a meanders in the vertical direction, so the water condensed on the refrigerant pipe 131 a and the heat transfer fins 131 b tends to move downward.

In the circulation path 110 , the first heat exchanger 130 and the second heat exchanger 140 are sequentially arranged on the downstream side of the blower 120 . Therefore, hot air, which is strong air blown from the blower 120 , easily passes through the first heat exchanger 130 . The hot air not only passes between the heat transfer fins 131 b, but also passes between the first heat exchanger 130 and the bottom wall 303 . The air path resistance between the first heat exchanger 130 and the bottom wall 303 is smaller than the air path resistance between the heat transfer fins 131b, so the force of the passing hot air is not easily reduced. Therefore, the water falling from the first heat exchanger 130 and remaining on the bottom wall 303 is easily blown downstream by the hot air flowing between the first heat exchanger 130 and the bottom wall 303 .

In this embodiment, the water blown downstream by the hot air is blocked by the protective wall 340 . Therefore, blown water can be prevented from entering the arrangement area 330 of the second heat exchanger 140 and adhering to the second heat exchanger 140 , thereby preventing the heating of the second heat exchanger 140 from being hindered.

The water blocked by the protective wall 340 flows to the drainage recess 313 through the drainage groove 322 .

Furthermore, in the present embodiment, even if water enters the arrangement area 330 and accumulates at the bottom thereof, the accumulated water is discharged through the drain portion 334 . The drained water flows to the drain hose 116 through the connection pipe 350 and the drain recess 313, and is discarded outside the machine. Accordingly, it is possible to prevent the water stored in the arrangement area 330 from leaking from the second duct 113 through the outflow port 310 , flowing through the introduction pipe 114 , and entering into the outer cylinder 20 .

In this embodiment, the number of heat exchange units 141 in the second heat exchanger 140 is greater than the number of heat exchange units 131 in the first heat exchanger 130 . Therefore, the heat exchange performance of the second heat exchanger 140 is higher than that of the first heat exchanger 130 . Accordingly, the air cooled by the first heat exchanger 130 for dehumidification can be sufficiently heated by the second heat exchanger 140 .

According to this embodiment, in the drum type washing and drying machine 1, the first heat exchanger 130 and the second heat exchanger 140 are accommodated in the second pipe 113 of the circulation path 110, and are arranged on the top surface 10a of the box 10 and the second heat exchanger 140. In the space S1 enclosed by the right side part 10b and the peripheral wall 201 of the outer cylinder 20, the dimension in the vertical direction increases from the top 201a side of the peripheral wall 201 to the right side part 10b side, the first heat exchanger 130 The size of the vertical direction of the second heat exchanger 140 increases from the top 201a side of the peripheral wall 201 to the right side surface 10b side, the refrigerant pipes of the first heat exchanger 130 and the second heat exchanger 140 131 a , 141 a meanders in an in-plane direction parallel to the radial direction of outer cylinder 20 .

According to this structure, the first heat exchanger 130 and the second heat exchanger 140 can be formed in a shape corresponding to the shape of the space S1 in which these

heat exchangers

130, 140 are arranged when the housing 10 is viewed from the front, that is, approximately Because of the triangular shape, it is difficult to generate an invalid space under these

heat exchangers

130, 140 in the part on the right side surface 10b side of the space S1. The

switches

130, 140 are set larger.

Furthermore, according to the present embodiment, the refrigerant pipe 131a of the first heat exchanger 130 is arranged to meander in the vertical direction, and the meandering amplitude increases from the top 201a side of the peripheral wall 201 to the right side surface 10b side.

According to this configuration, the first heat exchanger 130 can be formed so that the dimension in the vertical direction increases from the top 201 a side of the peripheral wall 201 toward the right side surface 10 b side.

Furthermore, according to the present embodiment, the first heat exchanger 130 functions as a cooler, and the low-temperature refrigerant flows through the refrigerant pipe 131 a to cool the air flowing through the circulation path 110 and dehumidify the air.

According to this structure, in the first heat exchanger 130, the refrigerant pipe 131a meanders in the vertical direction, so that the water condensed on the refrigerant pipe 131a and the heat transfer fin 131b tends to move downward when dehumidifying from the air, and easily flows to The second pipe 113 is the bottom surface of the circulation path 110 .

Furthermore, according to the present embodiment, the first heat exchanger 130 includes two headers 132 connected to both ends of the refrigerant pipe 131a. One of the two heads 132 is provided with a refrigerant inlet 133 , and the other is provided with a refrigerant outlet 134 . The refrigerant pipe 131a meanders up and down from one end of the refrigerant pipe 131a, extends rightward, folds back, and extends leftward. The other end of the refrigerant pipe 131a is located near one end.

According to this structure, the head 132 having the inlet 133 of the refrigerant and the head 132 having the outlet 134 of the refrigerant can be arranged close to each other, so that the work of connecting the connection pipe 184 and the return pipe 182 to the inlet 133 and the outlet 134, respectively, becomes easy. .

Furthermore, according to the present embodiment, the refrigerant pipe 141a of the second heat exchanger 140 is arranged to meander in the horizontal direction, and the meandering width increases from the peripheral wall 201 side to the top surface portion 10a side.

According to this configuration, the second heat exchanger 140 can be formed so that the dimension in the vertical direction increases from the top 201 a side of the peripheral wall 201 toward the right side surface 10 b side.

Furthermore, according to the present embodiment, the second heat exchanger 140 functions as a heater, and the high-temperature refrigerant flows through the refrigerant pipe 141 a to heat the air flowing through the circulation path 110 . The number of heat exchange units 141 of the second heat exchanger 140 is greater than the number of heat exchange units 131 of the first heat exchanger 130 .

According to this configuration, the heat exchange performance of the second heat exchanger 140 is higher than that of the first heat exchanger 130 , so the air cooled by the first heat exchanger 130 for dehumidification can be sufficiently heated by the second heat exchanger 140 .

The embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments and the like, and the embodiments of the present invention may be modified in various ways other than those described above.

For example, in the above-mentioned embodiment, the first heat exchanger 130 and the second heat exchanger 140 are arranged in the vertical direction surrounded by the top surface 10a and the right side surface 10b of the box 10 and the peripheral wall 201 of the outer cylinder 20 . In the space S1 whose size increases from the top 201a side of the peripheral wall 201 toward the right side surface 10b side. However, the first heat exchanger 130 and the second heat exchanger 140 may also be arranged in the area surrounded by the top surface portion 10a and the left side surface portion of the box 10 and the peripheral wall 201 of the outer cylinder 20. The top 201a side of the peripheral wall 201 is in a space that expands toward the left side of the face.

Furthermore, in the above embodiment, the first heat exchanger 130 includes three heat exchange units 131 , and the second heat exchanger 140 includes four heat exchange units 141 . However, the number of

heat exchange units

131, 141 included in these

heat exchangers

130, 140 can be appropriately changed according to the required heat exchange performance. In addition, the number of heat exchange units 131 in the first heat exchanger 130 and the number of heat exchange units 141 in the second heat exchanger 140 may also be the same.

Furthermore, in the above-described embodiment, the second heat exchanger 140 adopts a structure in which the refrigerant pipe 141a meanders in the horizontal direction. However, like the first heat exchanger 130, the second heat exchanger 140 may have a structure in which the refrigerant pipe 141a meanders in the vertical direction.

Furthermore, in the above embodiment, in the first heat exchanger 130 and the second heat exchanger 140 , the plurality of

heat exchange units

131 , 141 , that is, the

refrigerant pipes

131 a , 141 a are connected in series by the two

heads

132 , 142 . However, the first heat exchanger 130 and the second heat exchanger 140 may also adopt a structure in which a plurality of

refrigerant pipes

131 a , 141 a are connected in parallel by two

heads

132 , 142 . In this case, the refrigerant flows in parallel through the plurality of

refrigerant pipes

131a and 141a. In addition, since the number of refrigerant pipes 141a is an even number, that is, four, in the second heat exchanger 140 in which the inlet 143 and the outlet 144 are provided on one head 142, the inlet of the refrigerant is provided on one head 142. 143, a refrigerant outlet 144 is provided at the other head 142.

Furthermore, in the above-described embodiment, the first heat exchanger 130 and the second heat exchanger 140 are included in the heat pump device. However, the first heat exchanger 130 may also be constituted by a water-cooled heat exchanger or the like. In this case, a heater such as a semiconductor heater may be used instead of the second heat exchanger 140 .

Furthermore, as long as the box body 10 is in the shape of a square box, the external shape may not be a complete cuboid, for example, a part of the surface may be inclined with respect to the horizontal direction or the vertical direction.

In addition, the embodiments of the present invention can be appropriately modified in various ways within the range of the technical idea shown in the claims.

Claims

A drum-type washing and drying machine, characterized in that it has:

Square box-shaped box;

The outer cylinder is arranged in the box and has a cylindrical peripheral wall;

The drum is arranged in the outer drum and accommodates laundry; and

a drying device for drying the laundry in the drum,

The drying device has:

a circulation path connected to the outer cylinder, and air circulates between the circulation path and the outer cylinder; and

The heat exchanger includes flat refrigerant pipes with a plurality of flow paths through which the refrigerant flows and heat transfer fins connected to the refrigerant pipes, and conducts heat transfer between the air flowing through the circulation path and the refrigerant. exchange,

The heat exchanger is housed in the circulation path, and is arranged in a space surrounded by the top surface and side surface of the box and the peripheral wall, and the dimension in the vertical direction increases from the top side of the peripheral wall. In the space enlarged by the side of the side,

The refrigerant pipe is arranged in a plane parallel to the radial direction of the outer cylinder so that the vertical dimension of the heat exchanger increases from the top side of the peripheral wall toward the side surface side. meandering direction.
The drum type washer-dryer according to claim 1, characterized in that,

The refrigerant pipe meanders in the vertical direction, and the meandering width increases from the top side of the peripheral wall toward the side part side.
The drum type washer-dryer according to claim 2, characterized in that,

In the heat exchanger, a low-temperature refrigerant flows through the refrigerant pipes, cools air flowing through the circulation path, and dehumidifies the air.
The integrated drum washing and drying machine according to claim 2 or 3, characterized in that,

The heat exchanger includes two heads connected to both ends of the refrigerant pipe,

One of the two heads is provided with a refrigerant inlet, and the other is provided with a refrigerant outlet,

The refrigerant pipe meanders from one end of the refrigerant pipe in a vertical direction and extends in a predetermined direction, then folds back and extends in a direction opposite to the predetermined direction, and the other end of the refrigerant pipe is located near the one end.
The drum type washer-dryer according to claim 1, characterized in that,

The refrigerant pipe meanders in a horizontal direction, and the meandering width increases from the peripheral wall side to the top surface side.
The drum type washer-dryer according to any one of claims 1 to 5, characterized in that,

The heat exchanger includes:

a first heat exchanger that flows low-temperature refrigerant through the refrigerant pipes, cools air flowing through the circulation path, and dehumidifies the air; and

the second heat exchanger makes the high-temperature refrigerant flow in the refrigerant pipe to heat the air flowing through the circulation path,

The first heat exchanger and the second heat exchanger have the following structure: heat exchange units composed of the refrigerant tubes and the heat transfer fins are arranged along the axial direction of the outer cylinder,

The number of the heat exchange units of the second heat exchanger is greater than the number of the heat exchange units of the first heat exchanger.