JPS58195595A - Garment dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clothes dryer, and is a dehumidifying type clothes dryer that does not require exhaust duct work. The present invention relates to a clothes dryer having a structure suitable for downsizing.

Conventional dehumidifying clothes dryers use a so-called fin tube type heat exchanger consisting of copper pipes and aluminum fins, and the connection with the circulation air path is achieved by providing sealing properties on the flange surface. It was done.

In this case, the copper pipe is opened on the flange surface of the heat exchanger, and in order to maintain a seal between the copper pipe and the flange such as a steel plate, the copper pipe is opened in the flange surface of the heat exchanger. After pipe expansion, sealing paint is applied to the gaps between the joint surfaces, which reduces productivity and reduces reliability due to corrosion of the joints caused by moisture when used for long periods of time. It was requested.

11 In addition, the joint between the heat exchanger's fins and ducts and the duct that forms the circulation air path is fixed with multiple screws via rubber cracks. Improvements were desired in terms of time productivity and reliability in terms of water leakage.

The present invention is a so-called dehumidifying type clothes dryer that does not require construction of an exhaust duct, in which the heat exchanger is arranged in a cross-flow configuration in which rectangular tubes are orthogonal to each other, and can be integrally molded with thermoplastic resin. The object of the present invention is to provide a clothes dryer that uses the following methods.

The present invention is characterized by a drum rotatably supported within an outer frame and driven by an electric motor via a transmission mechanism such as a drive belt, and a fan for circulating hot air from a heat source through the drum and into a heat exchanger section. The dehumidifying type is provided with a cooling air path that includes the heat exchanger section and a cooling fan that blows outside air to cool the heat exchanger section. In the clothes dryer of
The heat exchanger section includes a plurality of rectangular tubes disposed in a cross-flow pattern orthogonal to each other, and rectangular tubes on the circulation air path side. good,
. 7. Shi,tsu,□yu1. Cooling wind, 11.

Connect adjacent rectangular pipes to the rectangular opening passage of
This clothes dryer is constructed using a thermoplastic resin integrally molded heat exchanger so as to provide a 1° opening rib.

More specifically, in a dehumidifying clothes dryer, a plurality of hollow rectangular tubes are arranged perpendicularly to each other so that the heat exchanger can be integrally molded with thermoplastic resin. The length ratio in the fluid flow direction is approximately 1:1, and a plurality of ribs in the fluid flow direction are provided inside each orthogonal rectangular tube, and one entrance and exit port of the rectangular tubes are orthogonal to each other. A flange part is provided on the flange part, and a convex part on the flange part can be used to join and integrate multiple integrally molded products, thereby maintaining airtightness and watertightness, and maintaining the required heat resistance. This is to ensure exchange ability.

Next, embodiments according to the present invention will be described with reference to the respective figures.

Here, FIG. 1 is a side sectional view of a clothes dryer according to an embodiment of the present invention, FIG. 2 is a partially opened sectional front view thereof, and FIG.
The figure is a sectional view of the bottom.

In the figure, a drum 5 provided in an outer frame 1 has a lid 6 for stirring the clothes put into the interior through an openable/closable clothes input port 2, and a front bearing part 7 provided in the outer frame 1. The circulating fan 17 is rotatably supported by a rear bearing 8 provided in the casing thereof, and is driven by an electric motor 10 via a transmission mechanism such as a drive belt 11 having a tension pulley. As shown by the solid arrow, the circulation air path guides the hot air from the heat source 14 to the drano-5, evaporates moisture from the clothes to be dried into the hot air, passes through the filter 9, and accelerates it with the circulation fan 17. The post-circulation duct 18 made of resin passes through and cools the inside of the circulation-side rectangular pipe 26 of the heat exchanger 25a of the heat exchanger section 25, and the moisture in the circulating air is separated and drained as water droplets. The heat source 14 is led back to the heat source 14 through a duct 19, and the circulation fan 17 is directly driven by the stain machine 10 through the belt 12. In addition, in order for the drum 5Vi to rotate, it is necessary to seal hot air between the rotating surface and the fixed surface.
Previous Knoll 15. A rear seal 16 is arranged to improve airtightness during rotation and sliding.

Next, the cooling air passage is connected to the air intake port 21 provided in the outer frame base 3, which is the lower surface of the outer frame l, as shown by the broken line arrows in FIGS. 1 to 3.
is led to the cooling fan 20 through the exhaust port 2 provided on the back cover 4.
4 is exhausted.

Further, a centrifugal fan is used as the cooling fan 20, and this is directly connected to the electric motor 20.

Here, the drum 50 rotation speed is 40 to 5 Qrpm,
From the reduction ratio via the drive belt 11, the electric motor 10 has a speed of 4
A polar motor is used, and the rotational speed of this electric motor 10 is approximately 1350rl)m (50H2), which is the rotational speed of the cooling fan 20 directly connected to the handle.

However, since the cooling fan 20 and the circulating fan 17 are disposed in almost the same plane, the diameter of the centrifugal fan and the expansion angle of the fan case can be set almost ideally. Even at a relatively low rotational speed of about 135 rpm, the air volume necessary for cooling can be ensured against the pressure loss of the heat exchanger section 25.

! Further, the drying time can be set using a timer 13, and after the set time, the rotation of the drum 5 is automatically stopped and the drying process is completed.

In addition, 22 is an intake filter, 23 is a cooling wind tunnel, 30.
31 and 32 are lips, gaps, and flange joints, which will be described later.

The illustrated heat exchanger section 25 is constructed by joining two heat exchangers 25A shown in FIG. 4 together.

That is, FIG. 4 is a partially sectional perspective view of the heat exchanger.

In the figure, 26 is a circulation side rectangular pipe, 26a is a rectangular pipe rib, 27
28 is a convex portion, 28 is a flange portion, 28a is a flange A, 28
b is a flange B, 29 is a rectangular opening 1:1 passage, 29a is an opening, a rib, and 3o is a lip.

That is, the heat exchanger 25a has 7 langes A' 28a and 7 langes B, which are connected to the flange part 28 and have a convex part 27, on the outer periphery of the entrance and exit of the rectangular pipe 26 on the circulation side that has a plurality of circuits.
28b, which is integrally molded from a thermoplastic resin such as crystalline polyethylene or polypropylene, and the rectangular opening passage 29 communicating with the cooling passage and the circulation side rectangular pipe 26 are in cross flow with each other. This relates to a so-called cross-flow type heat exchanger.

In addition, this heat exchanger 25a also has the air intake port 2 mentioned earlier.
A lip 30 for introducing cooling air from 1 to 7 langes A28a and B28b is integrally provided, and this is used to form a suction duct on the outer periphery of the intake port 21. be.

Furthermore, in FIG. 4, a plurality of circulation-side rectangular tubes 26 passing through the flange A 28a and flange B 28b serve as passages for the circulation-side fluid, and the outer surface of the circulation-side rectangular tube 26 is connected to the other fluid. This is a rectangular opening passage 29.

Here, the outer surface of the circulation side rectangular tube 26 is the heat transfer surface for the two fluids, and if the volumes are the same, the heat transfer area increases as the number of circulation side rectangular tubes 26 increases. However, in order to integrally mold the main body of the heat exchanger 25a from plastic such as polypropylene, the pressure during injection molding deforms the mold that forms one passage 29 between the circulation side rectangular tubes 26°. Width a, b on the short side of the rectangular passage
It is not possible to reduce the size of the

Furthermore, the length M in the flow direction of the circulation side rectangular pipe 26 and the rectangular opening passage 29 is also related to the strength of the mold.

Considering these, for example, in order to maximize the heat transfer area within the same volume, Fi, the dimensions of the above-mentioned arms a and b should be made almost the same, and the length and M should also be made the same, In addition, as a result, the circulation side rectangular pipe 26. The strength of the molds for making the rectangular opening passage 29 is almost the same.

Therefore, this embodiment is configured in this manner.

In this way, when the flow rates of the two fluids are approximately equal, the pressure loss can be made the same.

Furthermore, as shown in FIG. 4, when integrally molding the heat exchanger 25a, the integrally molded gate is formed so as to be provided at the black dot on the C surface shown in the figure or on the 0 surface, and thereby, The circulation side rectangular pipe 26 and the rectangular opening passage 29 include
Rectangular tube rib 26a.

An opening lip 29a is provided.

In this embodiment, the rectangular circulation pipe 26. is relatively thin with about 1 to 1.5 wtr. The flowability of the rectangular opening passage 29 is improved by the rib runner effect of each rib, so that the molding material flows almost uniformly, and even if the strength of the mold is insufficient, the same pressure can be applied to each molding material. It is designed to act on a mold that makes a rectangular shape.

Further, by providing such ribs, it helps to prevent thermal deformation due to temperature when used in a fixed state in a clothes dryer, and is effective.
.

Accordingly, the exemplary dimensions of the above-mentioned widths a and b in this embodiment are a-b-4 to 5 mm, and the exemplary dimension of the length M is approximately 80 rrr1n.

In addition to the above configuration, flange A28a and flange B28b of each heat exchanger 25a have convex portions 2 of the same shape.
7 is integrally molded, which corresponds to a plurality of heat exchangers 25a, that is, its 211'l! This is used when configuring the heat exchanger part 25 in which the convex parts 27 are laminated, and the convex parts 27 are joined together by a joining means such as ultrasonic waves or hot plate welding to form the flange joint part shown in FIG. 3 above. 32, it is possible to integrate them airtightly and watertightly, and also to obtain the required heat transfer area. I went back and forth, but I mentioned earlier that the circulation duct 18. The flange 7 portion of the pre-circulation duct 19 is also provided with a convex portion similar to the above, and the convex portion 27
By joining the two, a similar Franz joint is formed.

In the seven-lunge joint 32, as shown in FIG. 3, a gap 31 is formed between adjacent heat exchangers 25a, so that the heat exchange efficiency is increased due to the generation of turbulent flow. 'L G f4j
, t, □ is also 1゜ah.

One side is the air for the cold section, and the flow rate on the cooling side is large.
Laminated heat exchanger 25 degrees
1, the cross-sectional area of the ventilation on the cooling side is increased so that almost the same flow velocity ratio can be achieved, and the pressure loss can be made the same.

As described above, in this embodiment, the heat exchanger section 25 as described in detail above is used. Since the maximum heat transfer area can be obtained with the same volume within the heat exchanger 25a, high performance, low cost, and weight reduction are possible. In this case, since the convex parts 27 of the flange e4pJ related to the flange part 28 can be joined together with a close seal, the airtight reliability and productivity are high, and the flange joint part 32 Since there is some gap 31 between the rectangular tubes of adjacent heat exchangers 25a,
It is also expected that the heat exchange efficiency will increase due to the generation of turbulent flow, which will make it possible to create clothes dryers with high performance and good productivity.

Furthermore, when the clothes dryer is operating, moisture is separated and drained as water droplets in the circulation rectangular pipe 26, so the flange joint 3
2 and post-circulation duct 18. The flange joint with the pre-circulation duct 19 has sealing properties against water leakage and is made of thermoplastic resin. Post-circulation duct 18. Reliability such as strength against thermal stress is required for the heat exchanger section 25, and the above requirements are satisfied, including integration of the heat exchanger 25a by welding or adhesive means, as well as compactness of the joint part, It is also possible to achieve compactness and improve productivity.

Furthermore, in this embodiment, a resin such as polypropylene or polyethylene, which is a crystalline resin, is used as the integrally molded material of the heat exchanger 25a. When moisture is precipitated and separated on the heat exchange surface, after the moisture is precipitated as water droplets, the adsorption power to the heat exchange surface is weak, so it is quickly discharged, so the heat exchange performance can be improved. It is possible.

Next, FIG. 5 is a partially opened perspective view of a portion related to a heat exchanger in a clothes dryer according to another embodiment.

In the figure, 18A is the post-circulation duct, 18a is the flange, and 19
A is the pre-circulation duct l', 19a is the flange, 25 A is the heat exchanger part, 25b is the heat exchanger, 27 is the convex part, 28A is the flange part, 28 a # 2 g b is 7 langes A, B
, 32 is a flange joint.

That is, the clothes dryer of this embodiment is different from the post-circulation duct 18 in the previous embodiment. The pre-circulation duct 19 and the heat exchanger section 25A are the following described and illustrated post-circulation duct) 18A,
Pre-circulation duct) 19A, heat exchanger section 25A,
The other configuration is the same as that of the previous embodiment, and a 3 m heat exchanger 25b is used as a heat exchanger section 25A.

First, the heat exchanger 25b is connected to the flange portion 2 as before.
8AK Convex portion 2 on both flanges A28a and B28b
7 is provided, and the three holes of this heat exchanger 25b are integrated by the flange joint part 32, and the heat exchanger part 258'
That is.

Also, the flange A 28 of this heat exchanger 25・l″b
a e,,,j'.

B28 b, convex part 27 and 7 lunges with the same shape ■・
□・I Iga, like a cloth with 19a, made of thermoplastic resin,
A post-circulation duct 18A and a pre-circulation duct 19A are formed, and these and the integrated heat exchanger 25A are bonded together using a hot plate, ultrasonic welding, or adhesive means. Joint part 3
It is integrated by 2.

By doing this, it is possible to achieve the same effect as in the previous embodiment.As mentioned earlier, when the clothes dryer is operating, the circulation side is rectangular! 26, moisture is separated and drained as water droplets, so each flange joint 32 in this case has a sealing property to prevent water leakage, a pre-circulation tuft 19A made of thermoplastic resin, and a post-circulation duct 18A.
, the heat exchanger section 25A is required to have reliability such as strength against thermal stress, and at the same time, it completely satisfies the requirement, and at the same time, it also makes the joint part smaller and more compact, and improves productivity. It is possible.

Then, as in the previous embodiment, the width a.

':, 1 The dimension of b is, 4. In a dehumidifying type clothes dryer using a 3-layer stack as a heat exchanger section as in this example, the heat It has been experimentally confirmed that the exchanger has a heat exchange capacity of 700 W/h.

However, in the above embodiments, two or three heat exchangers are used to configure the heat exchanger section, but in this case, only one heat exchanger is used. It is something that can be done.

Further, the rectangular pipe lip may be provided as necessary.

Furthermore, when the capacity of the heat source is increased, the number of stacked layers is further increased, and the ratio of heat exchange amount to the heat source can be made almost the same as when the capacity of the heat source is not changed. It can correspond to

In summary, the present invention makes it possible to provide a dehumidifying clothes dryer that can improve performance, reliability, and productivity as well as downsize, and can be put to practical use. When it comes to inventions that are highly effective, there are seven.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a clothes dryer according to an embodiment of the present invention, FIG. 2 is a partially opened front view thereof, FIG. 3 is a bottom sectional view thereof, and FIG. FIG. 5 is a partially cut-away perspective view of the heat exchanger, and FIG. 5 is a partially opened perspective view of a heat exchanger-related portion in a clothes dryer according to another embodiment of the present invention. ■...Outer frame, 5...Drum, 1o...Electric motor, 1
DESCRIPTION OF SYMBOLS 1... Drive belt, 14... Heat source, 17... Circulation fan, 18.18A... Circulation duct, 19.1
9A... Pre-circulation duct, 18a, 19a... 7 lunges, 2o... Cooling fan, 25, 25A... Heat exchanger section, 25a. 25b... Heat exchanger, 26... Circulation side rectangular pipe, 26
a... Rectangular tube rib, 27... Convex portion, 28, 28A.
...Flange part, 28a, 28b...7 lange A, 7
Lunge B, 29... rectangular opening passage, 29a... opening lip, 30... rib, 31... gap, 32... and lunge joint. Agent: Patent attorney Kosaku Fukuda +j'', i'j'j, :(
:. (1 other person) ''' etc. 1 diagram flute 20 Math 3 diagram 1q 2q (L ¥40

Claims (1)

[Scope of Claims] 1. A drum rotatably supported within an outer frame and driven by an electric motor via a transmission mechanism such as a drive belt, and circulating hot air from a heat source to a heat exchanger section through the drum. A dehumidifying device having a circulation air path that is guided by a return fan and circulated back to the heat source, and a cooling air path that is composed of the heat exchanger section and a cooling fan that blows outside air to cool the heat exchanger section. In this type of clothes dryer, the heat exchanger section includes a plurality of rectangular tubes arranged in a cross-flow pattern orthogonal to each other, and a flange section is provided on the inlet/outlet surface of the rectangular tubes on the circulation air path side, and A clothes dryer characterized in that the rectangular opening passage is provided with an opening rib that communicates adjacent rectangular pipes, using a heat exchanger integrally molded with thermoplastic resin. 2. In the product described in claim 1, each of the plurality of rectangular tubes provided with a flange portion of the heat exchanger is provided with a rectangular tube rib that divides the rectangular opening of the rectangular tube in the longitudinal direction. Clothes dryer. 3. A clothes dryer according to claim 1, wherein the thermoplastic resin for integrally molding the heat exchanger is a crystalline resin such as polyethylene or polypropylene. 4. In the product described in claim 1, a joining convex portion is integrally molded on each of the seven flange portions of the heat exchanger, and a plurality of the heat exchangers are joined by the convex portion to form an integral body. A clothes dryer that is constructed using a 5. A clothes dryer according to claim 1, wherein the length ratio of the mutually orthogonal rectangular tubes of the heat exchanger in the fluid flow direction is approximately 1:1.