CN106894210A - Dryer - Google Patents

Abstract

A clothes dryer, comprising an inner tub and an outer tub sheathed outside the inner tub. One axial side has an inner barrel opening, and 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 near the outer barrel opening. There is an air outlet at the rear of the outer barrel opposite to the opening direction of the barrel, wherein the hot air is driven by a fan and enters the outer barrel from the hot air inlet. The hot air inlet has a plurality of nozzles, and the nozzles face the central axis of the inner barrel or below the central axis. . The air entering the gap from the through hole of the drum will continuously re-flow into the inner barrel to participate in the evaporation of water under the dragging effect of the airflow from the spray head, instead of being directly discharged from the air outlet. In this way, the drying efficiency of the clothes dryer can be significantly improved.

Description

clothes dryer

【Technical field】

The invention relates to a clothes dryer, comprising an inner tub and an outer tub sheathed outside the inner tub. There is a gap between the inner tub and the outer tub, and the inner tub has a cylindrical side wall, and a plurality of through holes are distributed on the cylindrical side wall. The axial side of the inner barrel has an inner barrel opening, and 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 near the outer barrel opening. An air outlet is arranged at the rear of the outer barrel opposite to the opening direction of the outer barrel, wherein hot air is driven by a fan and enters the outer barrel from the hot air inlet. In particular, the invention relates to the arrangement of the hot air inlet of a clothes dryer.

【Background technique】

Clothes dryers, especially washing and drying machines usually have a cylindrical inner tub and an outer tub sheathed outside the inner tub. There are many through holes distributed 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 flow from the rear of the outer tub discharge. In addition, since the inner barrel will be axially displaced 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 gap of a certain distance is left between the inner barrel and the outer barrel.

During the drying process, hot air enters from the openings of the outer tub and the inner tub, and exits from the rear of the outer tub. Ideally, the hot air passes through the clothes in the inner tub evenly, 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 since the inner tub has a through hole and there is a gap between the inner tub and the outer tub, part of the hot air will inevitably leak from the gap, and does not participate or only partially participates in the moisture evaporation of the clothing.

Especially when there are many clothes in the inner tub, a larger flow resistance is formed in the inner tub, so a large amount of hot air will leak 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 hole. As a result, the hot air in the inner barrel that participates in the evaporation of water decreases thereupon. At this time, the air discharged from the air outlet at the rear of the tub is mixed with the humid air participating in the evaporation and the dry hot air from the bypass gap. Such a mixed air has a low moisture content and has not reached a saturated state. And such air with a higher temperature and not reaching saturation enters the condensing device from the outer barrel to be cooled, so that the temperature drops below the dew point to condense the moisture therein. During this process, the hot air that does not fully participate in 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 invention】

An object of the present invention is to reduce the airflow of the part of the 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 objectives, the technical solution adopted by the present invention is: a clothes dryer, comprising an inner barrel and an outer barrel sleeved outside the inner barrel, there is a gap between the inner barrel and the outer barrel, and the inner barrel has a cylindrical side wall, the barrel A plurality of through holes are distributed on the side wall of the inner barrel. The inner barrel has an inner barrel opening on one side in the axial direction, and an outer barrel opening is arranged on the outer barrel near the inner barrel opening. A hot air inlet is provided at the opening of the outer tub, and an air outlet is provided at the rear of the outer tub opposite to the opening direction 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 nozzles , the spray head is directed towards 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 adhesion force of the main airflow, the surrounding air is The main airflow drags, creating a pressure drop around the main airflow, so more airflow moves towards the main airflow.

In the above technical solutions of the present invention, the hot air streams sprayed by the plurality of spray heads are directed toward the central axis of the inner tub or below the central axis along the direction of the spray heads. Closer to the sprinkler head, where the airflow is most concentrated and the velocity is highest, the resulting pressure drop is also greatest. Because the nozzle is mounted on the opening of the outer barrel, this is also where the gap opening is located, so the gas in the gap quickly moves closer to the hot air flow ejected from the nozzle, and re-enters the inner barrel with the hot air flow. In this way, at least at the front 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 water, instead of being discharged directly from the air outlet . Therefore, through this 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 airflow in the gap dragged larger, which is more conducive to realizing the purpose 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 airflow in the gap can be pulled out more, preventing a large amount of airflow from flowing away from the gap where the spray nozzles are sparsely distributed.

Preferably, each spray head is perpendicular to the gap in which it is installed. This is so that the hot air from the spray head does not enter the gap directly from the gap opening.

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

In addition, the outlet size of the nozzle matches the fan speed, and is set so that the primary airflow ejected from the nozzle can drag the secondary airflow in the gap to collect and join the primary airflow. In the case of a certain nozzle outlet size, the higher the fan speed, the higher the flow velocity of the primary airflow, and the greater the amount of secondary airflow it drags. And when the fan speed is determined, the flow rate of the main airflow provided by the outlet of the smaller nozzle is higher. In actual application, the outlet size of the nozzle must match the fan speed and be set accordingly according to the actual situation.

Further, the inner barrel shaft is preferably set approximately horizontally or inclined.

The present invention will be further described below in conjunction with the accompanying drawings.

【Description of drawings】

Figure 1 is an overall schematic diagram of a clothes dryer;

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

【detailed description】

As shown in FIG. 1 , the clothes dryer 100 has an outer tub 4 and an inner tub 6 disposed in a cabinet 2 . Wherein the inner barrel 6 is sleeved in the outer barrel 4 . And the inner tub 6 has a cylindrical side wall 61 . More through holes 62 are distributed on the cylindrical sidewall 61 . The central axis 63 of the inner barrel 6 is arranged horizontally. In order to prevent the inner tub 6 from colliding with the outer tub 4 when eccentrically vibrating during rotation, there is a gap 8 with a predetermined distance between the inner tub 6 and the outer tub 4 . Through the through hole 62 and the gap 8 , the inner barrel 6 and the outer barrel 4 are connected in space.

In addition, one axial side of the inner tub 6 has an inner tub opening 64 . An outer barrel opening 44 is provided on the outer barrel 4 near the inner barrel opening 64 . A ring of gap openings 84 is formed between the outer tub opening 44 and the inner tub opening 64 . The position corresponding to the outer tub opening 44 and the inner tub opening 64 on the casing 2 is provided with a clothes input port 24 , and a door 22 is provided to open or close the clothes input port 24 . The clothes inlet 24 is connected to the outer tub opening 44 through an elastic sealing ring 12 .

In order to dry the laundry placed in 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. Wherein the air condensing device 31 is connected with the air outlet 42 arranged on the outer tub 4, and cools the air entering 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 on the rear of the outer tub in the direction opposite to the opening 44 of the outer tub, such as on the side wall of the outer tub. The fan 32 is arranged downstream of the condensing device 31 to promote air flow between the outer tub 4 and the air handling system 20 . The air passes through the air heating device 33 after passing through the fan 32 to be heated. The heated air enters the outer tub 4 and the inner tub 6 through the hot air inlet 50 provided near the opening 44 of the outer tub.

As shown in FIGS. 1 and 2 , the hot air inlet 50 includes a plurality of spray heads 51 . These spray heads 51 are integrally formed on the sealing ring 12 , or are installed 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 around the gap opening 84 in the circumferential direction. In addition, the spray head 51 is disposed 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 downward of the central axis 63 .

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

Therefore, during the drying process, a large amount of high-speed main airflow 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, evaporates the moisture in the clothes, leaves the tub 4 from the air outlet 42 , and enters the condensing device 31 . Another part of the airflow is blocked by the clothes and enters the gap 8 between the inner tub 6 and the outer tub 4 through the through hole 62 on the inner tub 6 . Due to the dragging effect of the main airflow A1 ejected from the nozzle 51, the airflow in the gap 8 moves toward the gap opening 84, and becomes the secondary airflow A2 added to the main airflow A1, and then returns to the inner tub 6, thereby having the opportunity to interact with the clothes. Heat exchange, evaporate the moisture in the clothes. With such an airflow movement, less hot air entering the inner tub 6 passes directly from the gap 8 to the air outlet 42 . After the humidity of the hot air tends to be saturated, it enters the condensation device 31, and the drying efficiency is obviously improved.

As a preferred embodiment, each spray head 51 is perpendicular to the gap 8 where it is installed.

The various specific implementations described above and shown in the accompanying drawings are only used to illustrate the present invention, but not the entirety 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 for the present invention falls within the protection scope of the present invention.

Claims (7)

1. a kind of dryer, comprising interior bucket (6) and the outer barrel (4) being sheathed on outside interior bucket, between the inner barrel and outer barrel with Gap (8), and interior bucket (6) is with cylindrical sidewall (61), and plurality of through holes (62) is distributed with the cylindrical sidewall, The side of interior bucket axial direction has interior bucket opening (64), is close in outer barrel (4) and is provided with the position of interior bucket opening (64) Outer barrel opening (44), forms a ring gap opening (84) between outer barrel opening (44) and interior bucket opening (64), connect Hot air inlet (50) is provided with nearly outer barrel opening, the outer barrel rear portion in opposite direction with outer barrel opening (44) is provided with air Outlet (42), wherein hot-air are ordered about by fan (32) and enter outer barrel (4) from hot air inlet (50), and it is special Levy and be：The hot air inlet (50) is with a plurality of shower nozzles (51), central shaft (63) of the shower nozzle towards interior bucket Or the lower section of central shaft.

2. dryer as claimed in claim 1, it is characterised in that：The shower nozzle (51) is around clearance opening (84) It is uniformly distributed.

3. dryer as claimed in claim 1, it is characterised in that：Each shower nozzle (51) is perpendicular to its installation site Gap (8).

4. dryer as claimed in claim 1, it is characterised in that：The shower nozzle (51) is loaded on connection outer barrel opening (44) On the sealing ring (12) of casing (2).

5. dryer as claimed in claim 4, it is characterised in that：The shower nozzle (51) is shaped in the sealing On circle (12).

6. dryer as claimed in claim 1, it is characterised in that：The outlet size of shower nozzle (51) and fan (32) Rotating speed is engaged, and is arranged to make the primary air (A1) sprayed in shower nozzle (51) to drag the gap (8) In secondary airflow (A2) collect and be added thereto to primary air (A1).

7. dryer as claimed in claim 1, it is characterised in that：The interior bucket axle (63) is approximate horizontal or inclination sets Put.