CN106894210B - clothes dryer - Google Patents

Abstract

A clothes dryer comprises an inner barrel and an outer barrel sleeved outside the inner barrel, wherein a gap is formed between the inner barrel and the outer barrel, the inner barrel is provided with a barrel-shaped side wall, a plurality of through holes are distributed on the barrel-shaped side wall, an inner barrel opening is formed in one axial side of the inner barrel, an outer barrel opening is formed in the same direction of the outer barrel and the inner barrel, a circle of gap opening is formed between the outer barrel opening and the inner barrel opening, a hot air inlet is arranged close to the outer barrel opening, an air outlet is arranged at the rear part of the outer barrel opposite to the outer barrel opening, hot air is driven by a fan to enter the outer barrel from the hot air inlet, the hot air inlet is provided. The air entering the gap from the through hole of the roller continuously and repeatedly enters the inner barrel to participate in the evaporation of the moisture under the dragging action of the airflow sprayed by the spray head instead of being directly discharged from the air outlet. Therefore, the drying efficiency of the clothes dryer can be obviously improved.

Description

clothes dryer

【Technical field】

The invention relates to a clothes dryer, comprising an inner tub and an outer tub sleeved outside the inner tub, a gap is formed between the inner tub and the outer tub, and the inner tub has a cylindrical side wall, the cylindrical side wall is distributed with a plurality of through holes, The axial side of the inner barrel has an inner barrel opening, the outer barrel is provided with an outer barrel opening in the same direction as the inner barrel, a circle of gap openings is formed between the outer barrel opening and the inner barrel opening, and a hot air inlet is provided close to the outer barrel opening, which is close to the outer barrel opening. An air outlet is provided at the rear of the outer tub where the opening direction of the outer tub is opposite, wherein the hot air is driven by a fan to enter the outer tub from the hot air inlet. In particular, the present invention relates to the arrangement of the hot air inlet of a clothes dryer.

【Background technique】

A clothes dryer, especially a washing and drying machine, usually has a cylindrical inner tub and an outer tub sleeved outside the inner tub. There are many through holes on the inner tub, so water can pass through the through holes to wash the clothes during the washing process, or enter the outer tub through the through holes under the action of centrifugal force during the dehydration process, and from the back of the outer tub discharge. In addition, because the inner barrel will be displaced axially relative to the outer barrel under the action of unbalanced force during the rotation process, in order to avoid damage to the outer barrel and the inner barrel, a certain distance is left between the inner barrel and the outer barrel.

During the drying process, the hot air enters from the opening direction of the outer tub and the inner tub, and leaves from the rear of the outer tub. The ideal situation is that the hot air evenly passes through the clothes in the inner tub, fully exchanges heat with the clothes, evaporates the moisture in the clothes, and leaves the outer tub after forming saturated hot and humid air. However, the actual situation is that due to the through holes in the inner tub and the gap between the inner tub and the outer tub, part of the hot air will inevitably leak from the gap, not participating or only partially participating in the moisture evaporation of the clothes.

Especially when there is a lot of clothes in the inner tub, a larger flow resistance is formed in the inner tub, so a large amount of hot air leaks out from the gap between the inner tub and the outer tub. At the same time, the larger flow resistance in the inner barrel also makes it easier for hot air to enter the gap from the through holes. As a result, the hot air in the inner tub that participates in the evaporation of moisture is reduced accordingly. At this time, the air discharged from the air outlet at the rear of the outer tub is mixed with the humid air participating in the evaporation and the dry hot air from the bypass gap. Such mixed air has a low moisture content and does not reach a saturated state. However, the air with such a high temperature that has not reached saturation enters the condensing device from the outer barrel for cooling, so that the temperature drops below the dew point to condense the moisture in it. During this process, the hot air that does not fully participate in the evaporation is cooled. It can be seen that such a drying process is inefficient, requires a long drying time, and wastes a lot of heat energy.

[Content of the invention]

One object of the present invention is to reduce the air flow of the part of the clothes dryer that passes through the gap between the inner tub and the outer tub and directly leaves the outer tub during the drying process, so that the hot air entering the outer tub can fully participate in the moisture evaporation of the clothes .

In view of the above purpose, the technical solution adopted in the present invention is: a clothes dryer comprising an inner barrel and an outer barrel sleeved outside the inner barrel, a gap is formed between the inner barrel and the outer barrel, and the inner barrel has a cylindrical side wall, and the barrel A plurality of through holes are distributed on the side wall of the shape, the axial side of the inner barrel has an inner barrel opening, the outer barrel is provided with an outer barrel opening at a position close to the inner barrel opening, and a circle of gap openings is formed between the outer barrel opening and the inner barrel opening, close to the inner barrel opening. A hot air inlet is arranged at the opening of the outer tub, and an air outlet is arranged at the rear of the outer tub opposite to the opening of the outer tub, wherein the hot air is driven by a fan to enter the outer tub from the hot air inlet, and the hot air inlet has a plurality of spray heads , the nozzle is facing the central axis of the inner barrel or below the central axis.

At a relatively high speed, the airflow after leaving the nozzle has the following characteristics: the high-speed airflow forms a main airflow, and the movement direction of the main airflow is mainly determined by the nozzle; under the action of the adhesive force of the main airflow, the surrounding air is The main air flow is dragged, thereby forming a pressure drop around the main air flow, so that more air flows closer to the main air flow.

In the above technical solutions of the present invention, the hot air flow jetted by the plurality of nozzles is directed toward the central axis of the inner tub or below the central axis along the direction of the nozzles. The pressure drop is also greatest near the spray head, where the airflow is most concentrated and the flow velocity is highest. Since the nozzle is installed at the opening of the outer barrel, which is also where the gap opening is located, the gas in the gap quickly moves toward the hot air flow ejected by the nozzle, and re-enters the inner barrel with the hot air flow. In this way, at least in the front part of the outer barrel close to the opening of the outer barrel, the air entering the gap from the through hole of the drum will continuously re-enter the inner barrel with the hot air flow from the nozzle to participate in the evaporation of moisture, instead of being directly discharged from the air outlet. . Therefore, through the technical solution, the drying efficiency of the clothes dryer can be significantly improved, and heat energy can be saved at the same time.

At the same time, compared with a single nozzle, more nozzles make the air flow in the gap dragged in a larger range, which is more conducive to achieving the object of the present invention.

The spray heads may be arranged to be evenly distributed around the gap opening. Therefore, the hot air flow enters the inner barrel more evenly, and more importantly, the air flow in the gap can also be drawn out more, preventing the air flow from flowing away from the gap in the position where the sprinkler heads are sparsely distributed.

Preferably, each nozzle is perpendicular to the gap where it is installed. This arrangement prevents the hot air from the spray head from entering the gap directly from the gap opening.

The spray head is installed on the sealing ring connecting the opening of the outer barrel and the casing. The spray head can also be integrally formed on the sealing ring.

In addition, the size of the outlet of the nozzle is matched with the rotational speed of the fan, and is set so that the primary airflow ejected from the nozzle can drag the secondary airflow in the gap to the primary airflow and join it. When the size of the nozzle outlet is determined, the higher the fan speed, the higher the flow rate of the primary airflow, and the greater the amount of secondary airflow it drags. When the fan speed is determined, the smaller the nozzle outlet provides the higher the flow rate of the main air flow. In practical application, the outlet size of the nozzle must be matched with the fan speed, and the corresponding settings should be made according to the actual situation.

Further, the inner barrel shaft is preferably arranged substantially horizontally or obliquely.

The present invention will be further described below with reference to the accompanying drawings.

【Description of drawings】

Fig. 1 is the overall schematic diagram of the clothes dryer;

Figure 2 is a schematic diagram of the distribution of the nozzles and the direction of the air outlet of the nozzles.

【Detailed ways】

As shown in FIG. 1 , the clothes dryer 100 has an outer tub 4 and an inner tub 6 provided in the cabinet 2 . The inner barrel 6 is sleeved in the outer barrel 4 . And the inner tub 6 has a cylindrical side wall 61 . There are many through holes 62 distributed on the cylindrical side wall 61 . The central axis 63 of the inner tub 6 is arranged horizontally. In order to prevent the inner tub 6 from hitting the outer tub 4 when eccentric vibration occurs during the rotation, a gap 8 with a predetermined distance is provided between the inner tub 6 and the outer tub 4 . Through the through hole 62 and the gap 8, the inner tub 6 and the outer tub 4 are in spatial communication.

In addition, one axial side of the inner tub 6 has an inner tub opening 64 . An outer tub opening 44 is provided on the outer tub 4 near the inner tub opening 64 . A circle of clearance openings 84 is formed between the outer tub opening 44 and the inner tub opening 64 . A clothes inlet 24 is provided on the cabinet 2 at positions corresponding to the outer tub opening 44 and the inner tub opening 64 , and a door 22 is provided to open or close the clothes inlet 24 . The clothes input port 24 and the tub opening 44 are connected by an elastic sealing ring 12 .

In order to dry the clothes put into the inner tub 6 , the outer tub 4 is connected to an air treatment system 30 . The air handling system 30 includes an air condensing device 31 , a fan 32 and an air heating device 33 connected in sequence. The air condensing device 31 is connected to the air outlet 42 provided on the outer tub 4 to cool the air entering it from the outer tub 4, so that the moisture in the air condenses into dew and is separated from the air. Wherein, the air outlet 42 on the outer tub 4 in FIG. 1 is located on the rear end surface 46 of the outer tub opposite to the outer tub opening 44 . In other embodiments, the air outlet 42 may also be provided at other positions at the rear of the outer tub opposite to the direction of the outer tub opening 44 , for example, on the sidewall of the outer tub. A fan 32 is provided downstream of the condensing device 31 to facilitate the flow of air between the outer tub 4 and the air handling system 20 . The air is heated by the air heating device 33 after passing through the fan 32 . The heated air enters the outer tub 4 and the inner tub 6 through the hot air inlet 50 disposed near the outer tub opening 44 .

As shown in FIGS. 1 and 2 , the hot air inlet 50 includes a plurality of shower heads 51 . These spray heads 51 are integrally formed on the sealing ring 12 or mounted on the sealing ring 12 . The spray heads 51 are evenly distributed along the circumferential direction of the sealing ring 12 . Since the sealing ring 12 is connected to the outer tub opening 44 , and the gap opening 84 is adjacent to the outer tub opening 44 , the spray heads 51 are evenly distributed circumferentially around the gap opening 84 . In addition, the spray head 51 is provided toward the central axis 63 of the inner tub 6 . Since the air outlet 42 is located at a lower position of the outer tub 4 , in other alternative embodiments, the spray head 51 may also face the lower part of the central axis 63 .

The outlet size of the spray head 51 should be significantly smaller than the conventional hot air outlet in the prior art. At the same time, the rotational speed of the fan 32 should be relatively high, so that the hot air is ejected from the nozzle 51 at a high speed through the coordination of the outlet size of the nozzle 51 and the rotational speed of the fan 32 . The primary airflow A1 ejected from the spray head 51 can drag the secondary airflow A2 in the gap 8 to collect and join the primary airflow A1.

Therefore, during the drying process, a large amount of high-speed main air flow A1 sprayed from the spray head 51 is sprayed toward the middle or lower part of the inner tub 6 . Part of the air flow penetrates the clothes and evaporates the moisture in the clothes, and then leaves the outer tub 4 from the air outlet 42 and enters the condensing device 31 . Another part of the air flow is blocked by the clothes and then passes through the through hole 62 on the inner tub 6 and enters the gap 8 between the inner tub 6 and the outer tub 4 . Due to the dragging effect of the main air flow A1 ejected by the nozzle 51, the air flow in the gap 8 moves toward the gap opening 84, and becomes the secondary air flow A2 added to the main air flow A1, and returns to the inner tub 6 again, so that it has the opportunity to interact with the clothes. Heat exchange, evaporating moisture from clothes. With such airflow movement, the hot air entering the inner tub 6 is less directed from the gap 8 to the air outlet 42 . The humidity of the hot air tends to be saturated and then enters the condensing device 31, and the drying efficiency is obviously improved.

As a preferred embodiment, each spray head 51 is perpendicular to the gap 8 of its installed position.

The various specific embodiments described above and shown in the accompanying drawings are only used to illustrate the present invention, but not all of the present invention. Within the scope of the basic technical idea of the present invention, any form of modification made by those of ordinary skill in the relevant technical field to the present invention is within the protection scope of the present invention.

Claims (6)

1. A clothes dryer comprising an inner barrel (6) and an outer barrel (4) sleeved outside the inner barrel, a gap (8) is provided between the inner barrel and the outer barrel, and the inner barrel (6) has a cylindrical side wall (61). ), a plurality of through holes (62) are distributed on the cylindrical side wall, the axial side of the inner barrel has an inner barrel opening (64), and the outer barrel (4) is provided with an outer barrel at a position close to the inner barrel opening (64). The barrel opening (44), a circle of gap openings (84) is formed between the outer barrel opening (44) and the inner barrel opening (64), and a hot air inlet (50) is provided near the outer barrel opening, which is connected with the outer barrel opening (44) An air outlet (42) is provided at the rear of the outer tub in the opposite direction, wherein the hot air is driven by the fan (32) to enter the outer tub (4) from the hot air inlet (50), and is characterized in that: the hot air inlet (50) ) has a plurality of nozzles (51), the nozzles face the central axis (63) of the inner barrel or the lower part of the central axis, the outlet size of the nozzles (51) is matched with the rotational speed of the fan (32), and is set so that the nozzles (51) The ejected primary airflow (A1) can drag the secondary airflow (A2) in the gap (8) to the primary airflow (A1) and join it. 2. The clothes dryer according to claim 1, wherein the spray heads (51) are evenly distributed around the gap opening (84). 3. The clothes dryer according to claim 1, characterized in that: each spray head (51) is perpendicular to the gap (8) of the position where it is installed. 4. The clothes dryer according to claim 1, wherein the spray head (51) is mounted on the sealing ring (12) connecting the outer tub opening (44) and the casing (2). 5 . The clothes dryer according to claim 4 , wherein the spray head ( 51 ) is integrally formed on the sealing ring ( 12 ). 6 . 6. The clothes dryer according to claim 1, characterized in that: the inner barrel shaft (63) is arranged substantially horizontally or obliquely.

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