Washer dryer

Abstract

The objective is to provide a washing machine with improved dehumidification performance while suppressing cost increases. [Solution] The washing and drying machine of the present invention comprises an outer tub 2 housed inside a box 1 for storing washing water, an inner tub 3 housed inside the outer tub 2 for accommodating laundry, a blower 4 for supplying air to the outer tub 2 and the inner tub 3, a circulating air passage 5 from an intake port 5i at the rear of the outer tub 2 for drawing in circulating air to an outlet port 5o for blowing the circulating air into the inner tub 3, a heater 6 housed within the circulating air passage 5 for heating the circulating air, and a heat exchanger 8 housed within the circulating air passage 5 for dehumidifying the circulating air. The heat exchanger 8 is erected so as to extend in the vertical direction and is equipped with a plurality of heat exchange ribs 8b that protrude into the circulating air passage 5, and the interior of the plurality of heat exchange ribs 8b is equipped with water passages 8a4 through which water flows.

Description

Technical Field

[0001] The present invention relates to a washing and drying machine.

Background Art

[0002] A washing and drying machine performs a series of washing and drying of clothes. As a technology related to a washing and drying machine, for example, there is one described in Patent Document 1.

[0003] The washing and drying machine described in Patent Document 1 includes a tank for storing water, a blower for sending drying air, a circulation air passage connecting the tank and the blower, a drying filter provided between the circulation air passage and the blower in a state where the user can remove it outside the machine, and a heater.

[0004] The heater heats the air sent from the blower during the drying process to make it warm air. The warm air dries the clothes by taking moisture from the wet clothes. The warm air containing moisture is cooled and dehumidified by a heat exchanger. In the washing and drying machine of Patent Document 1, a heat exchanger of a water-cooled dehumidification method is used.

[0005] The washing and drying machine of the water-cooled dehumidification method dehumidifies by flowing tap water through a part of the circulation air passage and bringing the wet circulation air into contact with the tap water during the drying process.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] Washing machines and dryers require improved dehumidification performance. To improve the dehumidification performance of the heat exchanger in a water-cooled dehumidification system, it is necessary to improve the heat exchange efficiency between the tap water flowing in a portion of the circulating air passage and the circulating air. To improve the heat exchange efficiency of the heat exchanger in a water-cooled dehumidification system, it is effective to increase the contact area between the tap water and the circulating air. Therefore, in the technology described in Patent Document 1, a water passage is formed inside the heat exchanger, and heat exchange ribs are erected on the external heat exchange surface, and these are formed using materials containing aluminum (aluminum alloy, etc.) with high thermal conductivity. The heat exchange ribs erected on the heat exchange surface are designed to increase the surface area of ​​the heat exchange surface and promote heat exchange.

[0008] However, the technology described in Patent Document 1 has the problem that there is a predetermined distance between the water channel inside the heat exchanger and the tip of the heat exchange rib, and the heat exchange decreases as the heat moves over this distance, which increases the thermal resistance and consequently reduces the dehumidification performance.

[0009] Furthermore, heat exchangers, including the heat exchange ribs, are integrally molded using metals such as aluminum alloys. When increasing the height of the heat exchange ribs to enlarge the surface area of ​​the heat exchange surface, it is necessary to increase the thickness of the heat exchange ribs, which results in increased weight and cost of the heat exchanger.

[0010] The objective of the present invention is to provide a washing machine with improved dehumidification performance while suppressing cost increases. [Means for solving the problem]

[0011] To achieve the above objective, the present invention provides a washing and drying machine comprising: a box-shaped body constituting an outer shell; an outer tub provided inside the box-shaped body for storing washing water; an inner tub provided inside the outer tub for accommodating laundry; a blower for supplying air to the outer tub and the inner tub; a circulating air passage from an intake port at the rear of the outer tub for drawing in circulating air to an outlet port for blowing the circulating air into the inner tub; a heating means provided within the circulating air passage for heating the circulating air; and a heat exchanger provided within the circulating air passage for dehumidifying the circulating air, wherein the heat exchanger is erected to extend in the vertical direction and comprises a plurality of heat exchange ribs protruding into the circulating air passage, and the plurality of heat exchange ribs are provided with water passages through which water flows. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a washing machine with improved dehumidification performance while suppressing cost increases. [Brief explanation of the drawing]

[0013] [Figure 1] This is a cross-sectional view of the main components of a drum-type washing and drying machine S according to Embodiment 1 of the present invention, viewed from the side. [Figure 2] This is a cross-sectional view of the main part of the heat exchanger 8 of a drum-type washing and drying machine S according to Embodiment 1 of the present invention, viewed from the side. [Figure 3] This is a three-view drawing of the heat exchanger of a washing machine / dryer according to Embodiment 1 of the present invention, viewed from above, the front, and the side. [Figure 4] This is a three-view drawing of the heat exchanger of a washing machine / dryer according to Embodiment 2 of the present invention, viewed from above, the front, and the side. [Figure 5] This is an external perspective view of the heat exchanger of a washing machine according to Embodiment 2 of the present invention. [Figure 6] This is a plan view of the heat exchanger 8 of a washing machine and dryer according to Embodiment 2 of the present invention, unfolded into a planar shape. [Figure 7] This is a perspective view showing the heat exchanger 8 of a washing machine and dryer according to Embodiment 2 of the present invention in a state where it is folded along the fold 8e.

Best Mode for Carrying Out the Invention

[0014] Hereinafter, embodiments of the present invention will be described with reference to the drawings. For the same elements, the same reference numerals are generally used in all the drawings. In addition, for parts having the same function, the description will be omitted. Note that the configurations described below are merely examples, and the embodiments of the present invention are not intended to be limited to the following specific modes.

[0015] In the following embodiments, the side provided with the door 1d for loading and unloading laundry is defined as "front", and the side opposite to the door is defined as "rear". Also, the lower side of each drawing is defined as "bottom", and the upper side of the drawing is defined as "top".

Embodiment

[0016] FIG. 1 is a cross-sectional configuration diagram of the main part of the drum-type washing and drying machine S according to Embodiment 1 of the present invention as viewed from the side. FIG. 2 is a cross-sectional view of the main part of the heat exchanger 8 of the drum-type washing and drying machine S according to Embodiment 1 of the present invention as viewed from the side. FIG. 3 is a three-view drawing of the heat exchanger of the washing and drying machine according to Embodiment 1 of the present invention as viewed from above, in front, and from the side.

[0017] In the washing and drying machine described in the following embodiments, as an example, the drum-type washing and drying machine S is cited. However, the present invention is also applicable to a vertical washing and drying machine provided with an inner tub having a rotating shaft extending in a substantially vertical direction, and the configurations and effects are the same.

[0018] The drum-type washing and drying machine S performs washing and drying of laundry. The drum-type washing and drying machine S includes a cabinet 1, an outer tub 2, an inner tub 3, a blower 4, a circulation air duct 5, a heater 6 (heating means), a drying filter 7, and a heat exchanger 8.

[0019] The drum - type washing and drying machine S has its outer shell formed by the cabinet 1. At the front of the cabinet 1, a door 1d for loading and unloading laundry is provided. At the upper part of the cabinet 1, a control device 1c responsible for controlling the drum - type washing and drying machine S is provided. The control device 1c is composed of various circuits such as a microcomputer, a sensor circuit, a drive circuit for rotating the inner tub 3, etc.

[0020] The outer tub 2 is provided inside the cabinet 1. Washing water is stored inside the outer tub 2. At the upper rear part inside the cabinet 1, a water supply valve (not shown) for supplying water to the outer tub 2 is provided.

[0021] The inner tub 3 is provided inside the outer tub 2 and houses the laundry. The inner tub 3 is arranged such that the rotation axis O is substantially horizontal and rotates around the substantially horizontal rotation axis O.

[0022] The blower 4 is provided at the upper part of the outer tub 2 and supplies air (circulating air) to the outer tub 2 and the inner tub 3. The air (circulating air) supplied from the blower 4 during the drying process dries the laundry inside the inner tub 3.

[0023] The circulation air duct 5 connects the outer tub 2 and the blower 4. The circulation air duct 5 is provided with a duct 5d arranged at the rear part of the outer tub 2 through which the drying air flows, a first bellows hose 5j1, and a second bellows hose 5j2. Incidentally, the circulation air duct 5 is defined from the suction port 5i of the duct 5d that sucks in the circulation air to the blow - out port 5o that blows out the circulation air into the inner tub 3. The suction port 5i is a suction port that sucks in the circulating air at the rear part of the outer tub into the circulation air duct.

[0024] The first bellows hose 5j1 and the second bellows hose 5j2 are configured to prevent the vibration of the outer tub 2 generated during the rotation of the inner tub 3 from propagating to the components (such as the blower 4, the heater 6, etc.) fixed to the cabinet 1 by deformation.

[0025] The heater 6 is provided inside the circulation air duct 5. The heater 6 heats the circulation air sent from the blower 4 in the circulation air duct 5 during the drying process.

[0026] The drying filter 7 is located inside the circulating air passage 5. During the drying process, the drying filter 7 collects lint (thread) contained in the circulating air before it reaches the blower 4.

[0027] The heat exchanger 8 is installed in the circulating air passage 5 and cools and dehumidifies the circulating air flowing through the circulating air passage 5. The heat exchanger 8 is erected so as to extend in the vertical direction and is equipped with a plurality of heat exchange ribs 8b that protrude toward the circulating air passage 5. In addition, a water channel 8a4 through which water flows is provided inside the plurality of heat exchange ribs 8b. The heat exchanger 8 of Embodiment 1 uses a water-cooled dehumidification method. The surfaces of the heat exchanger 8 that are struck by the circulating air form a first heat exchange surface 8a1, a second heat exchange surface 8a2, and a third heat exchange surface 8a3.

[0028] One end of the first internal water supply hose 9a is connected to the lower end of the outer tub 2. The other end of the first internal water supply hose 9a is connected to a lint filter 10 that removes lint (fuzz) during washing and rinsing.

[0029] Downstream of the lint filter 10 is a circulation pump 11 for circulating the wash water. Downstream of the circulation pump 11 is connected to a second internal water distribution hose 9b and a third internal water distribution hose 9c which is connected to a drain valve 12. The second internal water distribution hose 9b is connected to the top of the outer tub 2 and supplies wash water into the inner tub 3. The drain valve 12 is connected to an external drain hose 13 for draining water outside the machine.

[0030] <Circulation and drainage of washing water> During the washing and rinsing cycles, the washing water and rinse water are circulated from the outer tub 2 through the first internal water distribution hose 9a, lint filter 10, circulation pump 11, and second internal water distribution hose 9b, as shown by arrows α11 and α12 in Figure 1, and then showered out from the top of the inner tub 3.

[0031] When draining the wash water and rinse water, the water is drained from the outer tub 2 through the first internal water distribution hose 9a, lint filter 10, circulation pump 11, third internal water distribution hose 9c, drain valve 12, and external drain hose 13, as shown by arrows α11, α13, and α14 in Figure 1.

[0032] During the drying process, the blower 4 generates drying air to dry the laundry. The drying air that has passed through the laundry in the inner tub 3 flows from the inner tub 3 to the outer tub 2 (dashed arrow β11 in Figure 1), and then passes through the intake port 5i (dashed arrow β12 in Figure 1), duct 5d (dashed arrow β13 in Figure 1), first bellows hose 5j1 (dashed arrow β14 in Figure 1), drying filter 7, blower 4, heater 6 (dashed arrow β15 in Figure 1), and second bellows hose 5j2, before being discharged again into the inner tub 3 from the outlet 5o (dashed arrow β16 in Figure 1). The drying air circulates within the drum-type washer-dryer S in the manner described above.

[0033] <Heat exchanger 8> As shown in Figures 2 and 3, the heat exchanger 8 is located on the rear side of the heat exchanger 8 and includes a first heat exchange surface 8a1 fixed to the main body mounting body 8f, a plurality of heat exchange ribs 8b that are erected to extend vertically and protrude forward (towards the circulation air passage 5) from the first heat exchange surface 8a1, a second heat exchange surface 8a2 located on both outer sides of the heat exchange ribs 8b, a third heat exchange surface 8a3 that connects the second heat exchange surfaces 8a2 located on both outer sides and is located at the front tip of the heat exchange ribs 8b, and a water passage 8a4 formed inside the heat exchange ribs 8b. The water passage 8a4 is composed of the second heat exchange surface 8a2, the third heat exchange surface 8a3 and the main body mounting body 8f. The heat exchanger 8 is fixed inside the circulation air passage 5.

[0034] The heat exchanger 8 is formed, for example, using a metal component with high thermal conductivity (such as stainless steel or aluminum alloy). Alternatively, the heat exchanger 8 can be formed by bending a single metal plate (metal component).

[0035] The upper part of the main mounting body 8f of the heat exchanger 8 is equipped with cooling nozzles 20 that distribute cooling water 21, which is made from tap water, from a water inlet 8k to multiple water channels 8a4. Cooling water 21 is stored in the cooling nozzles 20 up to the tap water level 21a.

[0036] The cooling nozzle 20 has an open top surface in the shape of a rectangular parallelepiped. Cooling water 21 is supplied from a water inlet 8k located in the center of the cooling nozzle 20 and flows into the water channels 8a4 of each heat exchange rib 8b from multiple cooling water outlet holes 20i located at the bottom of the cooling nozzle 20, cooling the first heat exchange surface 8a1, the second heat exchange surface 8a2, and the third heat exchange surface 8a3.

[0037] As mentioned above, the heat exchange ribs 8b protrude forward (into the circulating air passage) from the first heat exchange surface 8a1, increasing the surface area of ​​the second heat exchange surface 8a2 and promoting heat exchange. In other words, the first heat exchange surface 8a1 of the heat exchanger 8 has multiple rib-shaped heat exchange ribs 8b, and the second heat exchange surface 8a2 is located outside the heat exchange ribs 8b, thus allowing the heat exchange surface to be expanded.

[0038] Furthermore, the duct 5d, through which circulating air flows from bottom to top (dashed arrow β13), is designed to extend approximately vertically (up and down). The heat exchanger 8 installed in the duct 5d is designed so that its heat exchange ribs 8b extend approximately vertically (up and down) along the circulating air flowing through the duct 5d. This allows the heat exchanger 8 to have a large heat transfer surface area with the circulating air in the duct 5d.

[0039] The inner surface of the heat exchange rib 8b is provided with multiple circular protrusions 8c that project into the water channel 8a4. The multiple protrusions 8c are arranged in a vertical direction, alternating left and right and in a staggered pattern when viewed from the front of the heat exchanger 8. Furthermore, when viewed from the side, the positions of adjacent protrusions 8c in the vertical direction are offset. That is, the second and fourth rows of protrusions 8c from the top are positioned further forward than the first, third, and fifth rows of protrusions 8c from the top. The cooling water 21 flowing into the water channel 8a4 flows down in a meandering manner between the aforementioned protrusions 8c (arrow γ11 in Figure 3). In other words, the protrusions 8c function as diffusion members that diffuse the water flowing in the water channel 8a4 within the water channel 8a4.

[0040] According to Example 1, since a water channel 8a4 is formed inside the heat exchange rib 8b, heat exchange of circulating air (circulating wind) can be promoted.

[0041] Furthermore, according to Example 1, the inner surface of the heat exchange rib 8b is provided with a plurality of protrusions 8c that project into the water channel 8a4, and the water flowing through the water channel 8a4 is diffused, so that the heat exchange rib 8b can be cooled uniformly, the heat transfer surface temperature can be made uniform, and the heat exchange of circulating air (circulating wind) can be promoted.

[0042] Furthermore, the second heat exchange surface 8a2 located on the outer side of the heat exchange rib 8b is provided with a plurality of protrusions 8d that project outward. The circulating air flowing along the side of the heat exchange rib 8b is disturbed by the plurality of protrusions 8d (dashed arrow β13 in Figure 3). According to Embodiment 1, by disturbing the flow of the circulating air with the plurality of protrusions 8d, heat transfer between the second heat exchange surface 8a2 of the heat exchange rib 8b and the circulating air can be promoted. The plurality of protrusions 8d in Embodiment 1 function as resistive members that disturb the flow of the circulating air.

[0043] Here, the first heat exchange surface 8a1 and the second heat exchange surface 8a2 exchange heat between the circulating air flowing through the duct 5d (dashed arrow β13) and the cooling water 21 flowing through the water channel 8a4 (arrow γ11 in Figure 3). As a result, the dehumidifying cooling water 21 flowing through the water channel 8a4 cools and dehumidifies the circulating air flowing through the duct 5d. At this time, the uniformity of the heat transfer surface temperature and the promotion of heat transfer with the circulating air increase the heat exchange efficiency between the second heat exchange surface 8a2 and the circulating air (dashed arrow β13), which can shorten the drying time and reduce power consumption.

[0044] The heat exchanger 8 in Example 1 can be formed from a thin, highly thermally conductive metal component (such as stainless steel or aluminum alloy), which reduces the thermal resistance from the cooling water 21 flowing through the water channel 8a4 to the circulating air. This improves heat transfer performance and dehumidification performance, leading to shorter drying times and reduced power consumption.

[0045] Furthermore, in the heat exchanger 8 of Example 1, the weight of the heat exchanger 8 can be reduced by forming it with a thin metal component. For example, using a metal plate with a thickness of about 0.6 mm, the heat exchanger 8 has a length of about 260 mm, a width of 70 mm, a height of 30-40 mm, and a width of 1-3 mm, with a heat transfer area of ​​about 70,000 mm². 2 When the heat exchanger 8 is manufactured using this method, its weight is reduced to 1 / 4 to 1 / 3 of that of conventional die-cast or other integrally molded heat exchangers. Furthermore, in Example 1, the heat exchanger 8 can be formed by bending a single metal plate (metal component), thus reducing the manufacturing cost of the heat exchanger 8.

[0046] In Example 1, protrusions are provided on the inner and outer surfaces of the heat exchange rib 8b. However, by changing a portion of each protrusion into a recess, the inner surface, protrusions, and recesses on the outer surface can be integrally molded. This allows for further weight reduction of the heat exchanger 8 in Example 1.

[0047] Furthermore, a drain port 8h for discharging cooling water 21 is provided at the lower part of the main mounting body 8f of the heat exchanger 8, following the water channel 8a4.

[0048] The cooling water 21 discharged from the drain port 8h passes through a portion 2a (see Figure 2) inside the outer tank 2 from the lower part of the circulating air passage 5 and is drained outside the machine.

[0049] This configuration increases the heat exchange efficiency between the second heat exchange surface 8a2 and the circulating air (dashed arrow β13), and reduces the thermal resistance from the cooling water 21 flowing through the water channel 8a4 to the circulating air. Furthermore, according to Example 1, the improved heat transfer performance and enhanced dehumidification performance allow for a reduction in drying time and power consumption. [Examples]

[0050] Next, Embodiment 2 of the present invention will be described using Figures 4 to 7. Figure 4 is a three-view drawing of the heat exchanger of the washing machine according to Embodiment 2 of the present invention, viewed from above, the front, and the side. Figure 5 is an external perspective view of the heat exchanger of the washing machine according to Embodiment 2 of the present invention.

[0051] Example 2 is characterized in that the circular protrusion 8c formed on the inner surface of the heat exchange rib 8b of Example 1 is replaced with an elongated rectangular rib. The other components are the same as in Example 1, so the same reference numerals are used for the same components, and their detailed descriptions are omitted.

[0052] In Figure 4, the inner surface of the heat exchange rib 8b, i.e., the water channel 8a4, is provided with elongated rectangular protrusions 8c in a zigzag pattern, extending at an angle of approximately 20 degrees to the horizontal. In other words, the rectangular protrusions 8c are arranged such that the inclination direction of adjacent protrusions above and below each other is different. The cooling water 21 supplied to the water channel 8a4 flows down in a meandering manner between the protrusions 8c (arrow γ11 in Figure 4). The rectangular protrusions 8c function as diffusion members that diffuse the water flowing through the water channel 8a4.

[0053] According to Example 2, the inner surface of the heat exchange rib 8b is provided with a plurality of rectangular protrusions 8c that project into the water channel 8a4, and the water flowing through the water channel 8a4 is diffused, so that the heat exchange rib 8b can be cooled uniformly, the heat transfer surface temperature can be made uniform, and the heat exchange of the circulating air can be promoted.

[0054] Furthermore, in Example 2, by making the horizontal temperature of the second heat exchange surface 8a2 uniform, the heat exchange efficiency between the second heat exchange surface 8a2 and the circulating air (dashed arrow β13) is further increased, which can shorten the drying time and reduce power consumption.

[0055] Furthermore, in Example 2, similar to Example 1, the heat exchanger 8 is formed from a thin metal component, thereby reducing the weight of the heat exchanger 8 and lowering the manufacturing cost of the heat exchanger 8.

[0056] Next, as an example, the method for forming the heat exchanger in the washing machine / dryer of Example 2 will be explained using Figures 6 and 7. Figure 6 is a plan view of the heat exchanger 8 of the washing machine / dryer according to Example 2 of the present invention, unfolded into a planar shape. Figure 7 is a perspective view showing the heat exchanger 8 of the washing machine / dryer according to Example 2 of the present invention folded along the fold line 8e. Figure 6 represents the first stage of forming the heat exchanger 8, and Figure 7 represents the second stage of forming the heat exchanger.

[0057] In forming the heat exchanger 8, first, as shown in Figure 6, protrusions 8c and folds 8e are formed on a thin metal sheet by press working. When the heat exchanger 8 is unfolded into a flat surface, the multiple protrusions 8c are formed to face the same direction.

[0058] Next, as shown on the left side of Figure 7, the metal plate with the protrusions 8c and folds 8e is bent by pressing from both sides along the folds 8e. Then, as shown on the right side of Figure 7, it is bent until the protrusions 8c and the second heat exchange surface 8a2 are in close contact, and it is fixed to the main mounting body 8f in the circulating air passage 5 to complete the heat exchanger 8. In the completed heat exchanger 8, the protrusions 8c are arranged in a zigzag pattern.

[0059] According to Example 2, by bending a thin metal material to form the water channel 8a4 with a combination of heat exchange ribs 8b and protrusions 8c, the weight of the heat exchanger 8 can be reduced to 1 / 4 to 1 / 3 compared to conventional integral molding such as die casting. Furthermore, according to Example 2, since the heat exchanger 8 can be formed by bending a single metal plate (metal component), the manufacturing cost of the heat exchanger 8 can be reduced.

[0060] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are included. For example, the embodiments described above are described in detail for the purpose of explaining the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Furthermore, it is possible to replace parts of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add configurations from other embodiments to the configuration of one embodiment. In addition, it is possible to add, delete, or replace parts of the configuration of each embodiment with other configurations. [Explanation of symbols]

[0061] 1... Enclosure, 1c... Control device, 1d... Door, 2... Outer tank, 2a... Part of the inside of outer tank 2, 3... Inner tank, 4... Blower, 5... Circulation air passage, 5d... Duct, 5i... Intake, 5j1... First bellows hose, 5j2... Second bellows hose, 5o... Outlet, 6... Heater, 7... Drying filter, 8... Heat exchanger, 8a1... First heat exchange surface, 8a2... Second heat exchange surface, 8a3... Third heat exchange surface, 8a4... Water passage, 8b... Heat exchange duct B, 8c…protrusion, 8d…protrusion, 8e…fold, 8f…main unit mounting body, 8h…drain port, 8k…water inlet, 9a…first internal water distribution hose, 9b…second internal water distribution hose, 9c…third internal water distribution hose, 10…lint filter, 11…circulation pump, 12…drain valve, 13…external drain hose, 20…cooling nozzle, 20i…cooling water outlet hole, 21…cooling water, 21a…tap water level, O…rotating shaft, S…drum-type washing machine and dryer

Claims

1. The outer shell consists of a box-like structure, The box is equipped with an outer tub for storing washing water, An inner tub for storing laundry is provided inside the outer tub, A blower that supplies air to the outer tank and the inner tank, A circulating air path from an intake port that draws in circulating air at the rear of the outer tank to an outlet port that blows the circulating air into the inner tank, A heating means provided within the aforementioned circulating air passage for heating the circulating air, A washing and drying machine comprising a heat exchanger provided in the aforementioned circulating air passage for dehumidifying the circulating air, The heat exchanger is erected so as to extend in the vertical direction and is equipped with a plurality of heat exchange ribs that protrude toward the circulating air passage. A washing and drying machine characterized in that the inside of the plurality of heat exchange ribs is provided with water channels through which water flows.

2. In the washing and drying machine according to claim 1, A washing machine and dryer characterized in that the inner surfaces of the plurality of heat exchange ribs are provided with diffusion members that diffuse the water flowing through the water channels into the water channels.

3. In the washing and drying machine according to claim 2, The washing machine and dryer is characterized in that the diffusion member is a plurality of protrusions that project from the inner surface of the heat exchange rib toward the water channel.

4. In the washing and drying machine according to claim 3, A washing machine and dryer characterized in that the multiple protrusions are arranged in a vertical direction, and the positions of adjacent protrusions in the vertical direction are offset.

5. In the washing and drying machine according to claim 4, A washing machine and dryer characterized in that the multiple protrusions are arranged alternately on the left and right sides.

6. In the washing and drying machine according to claim 3, A washing machine and dryer characterized in that the plurality of protrusions are circular.

7. In the washing and drying machine according to claim 3, The washing machine and dryer is characterized in that the plurality of protrusions are rectangular ribs inclined with respect to the horizontal direction, and are arranged so that the inclination directions of adjacent protrusions are different vertically.

8. In the washing and drying machine according to claim 3, A washing machine and dryer characterized in that the outer sides of the plurality of heat exchange ribs are provided with resistance members that protrude outward and disrupt the flow of the circulating air.

9. In the washing and drying machine according to claim 3, The heat exchanger is characterized by being formed by bending a metal plate to create the plurality of heat exchange ribs in a washing machine and dryer.

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