CN117626612A - Process air channel and laundry treatment device - Google Patents
Process air channel and laundry treatment device Download PDFInfo
- Publication number
- CN117626612A CN117626612A CN202311086689.XA CN202311086689A CN117626612A CN 117626612 A CN117626612 A CN 117626612A CN 202311086689 A CN202311086689 A CN 202311086689A CN 117626612 A CN117626612 A CN 117626612A
- Authority
- CN
- China
- Prior art keywords
- process air
- outlet
- guiding element
- air channel
- laundry treatment
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 189
- 238000001035 drying Methods 0.000 claims abstract description 22
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
The invention relates to a process air duct (8) of a laundry treatment apparatus (1) for drying laundry, wherein, when the process air duct (8) is arranged in the laundry treatment apparatus (1) as specified, process air for drying laundry can be supplied to a process air blower of the laundry treatment apparatus (1) by means of the process air duct (8), wherein the process air duct (8) has a process air outlet (9) which can be connected to the process air blower and an outlet chamber (12) which is connected upstream of the process air outlet (9), wherein the outlet chamber (12) has a chamber wall (13) which is formed in the shape of a ring segment and is arranged coaxially to the process air outlet (9). In order to reduce the energy consumption and noise of the laundry treatment device (1), at least one air guiding element (15, 19) directed towards the process air outlet (9) is arranged between the chamber wall (13) and the process air outlet (9).
Description
Technical Field
The invention relates to a process air duct of a laundry treatment apparatus for drying laundry, wherein, when the process air duct is arranged in the laundry treatment apparatus in a defined manner, a process air blower of the laundry treatment apparatus can be supplied with process air for drying laundry by means of the process air duct, wherein the process air duct has a process air outlet, which can be connected to the process air blower, and an outlet chamber, which is connected upstream of the process air outlet, wherein the outlet chamber has a chamber wall which is formed in a ring segment shape and is arranged coaxially to the process air outlet. The invention further relates to a laundry treatment apparatus for drying laundry, comprising a process air channel and a process air blower connected downstream with respect to a process air flow through the process air channel.
Background
The laundry treatment apparatus may be designed as a dryer or a laundry dryer so as to be able to dry laundry. Such laundry treatment apparatuses may be equipped with a heat pump, with which heat is recovered from the process air used for drying the laundry and reused for heating the process air used for drying the laundry, in order to reduce the energy consumption associated with the drying process. A section of the process air circuit of the laundry treatment apparatus, in which the condenser of the heat pump is provided, is usually connected via a process air channel to a process air blower of the process air circuit, with which process air can be circulated in the process air circuit during the drying process.
The flow field on the process air blower suction side in the process air channel outlet chamber immediately upstream of the process air blower during drying is typically very complex and includes a primary flow separation zone near the process air channel outlet to the process air blower. The main reason for this complexity is the conventional geometry of the outlet chamber, in particular the disk shape of the outlet chamber, which causes a flow recirculation of the process air flowing into the outlet chamber. The direction of rotation of this flow recirculation is opposite to the direction of rotation of the process air blower wheel, which results in higher power consumption of the process air blower. In addition, current heat pump dryers may have unstable air flow properties, thus resulting in various power conditions due to abrupt changes in flow rate (operating point), which in turn results in higher power consumption and higher noise levels.
DE 10 2012 012 511 A1 relates to a blower for an air guiding process of a household appliance. The blower has a housing surrounding a rotor with a shroud and a baffle opening having a dissipative recirculation zone in the suction zone of the rotor for sucking gaseous media, which results in reduced media delivery efficiency and increased noise. In addition, the fan has means to reduce the effect of the dissipative recirculation zone. In the region of the least specific volume in the dissipative recirculation zone, the deflector has at least one return opening facing the deflector side of the deflector.
Disclosure of Invention
The aim of the invention is to reduce the energy consumption and noise of a laundry treatment device.
This task is solved by a preferred embodiment of the present invention. Advantageous designs are presented in the following description, alternative embodiments and figures, wherein these designs themselves or various combinations of at least two designs with each other may represent further aspects, especially preferred or advantageous aspects, of the invention.
According to the invention, a process air duct for a laundry treatment machine for drying laundry is proposed, by means of which process air for drying laundry can be supplied to a process air blower of the laundry treatment machine when the process air duct is arranged in the laundry treatment machine as specified, the process air duct having a process air outlet connectable to the process air blower and an outlet chamber connected upstream of the process air outlet, wherein the outlet chamber has a chamber wall which is designed as an annular section and is arranged coaxially to the process air outlet, and at least one air guiding element which is directed towards the process air outlet is arranged between the chamber wall and the process air outlet.
According to the invention, the portion of the process air flow in the process air channel that impinges the outlet chamber in the outlet chamber is slowed down by the at least one air guiding element, so that no conventional process air circulation takes place in the outlet chamber. Instead, the portion of the process air flow in the process air channel that impinges on the air guiding element is diverted in the direction of the process air outlet of the process air channel so as to be able to flow directly to the process air blower. In general, the present invention achieves a more stable process air flow ratio at higher efficiency, and in particular reduces power consumption at the same process air flow and pressure. In addition, the present invention also greatly improves the sound comfort of the laundry treating apparatus.
Advantageously, the air guiding element is arranged extending substantially radially towards the process air outlet.
More advantageously, the air guiding element is arranged on the inner side of the chamber wall. Such a design may provide better mechanical stability for the air guiding element and the chamber wall.
The air guiding element may be integrally connected with the rest of the process air channel. The air guiding element can furthermore be connected to a side wall section of the process air channel having a process air outlet. The process air channel can also have two or more air guiding elements, in particular air guiding elements of different or identical design.
The process air flowing through the process air channel flows through the process air outlet to the process air blower. For example, the process air outlet may have a circular or oval cross section or may be designed as a regular polygon. For example, the outlet chamber upstream of the process air outlet may be designed in the shape of a disk and thus may be arranged coaxially with the central axis of the process air outlet. A part of the outlet chamber is closed off radially outside by a chamber wall which is designed in the shape of a ring segment and is arranged coaxially to the process air outlet.
The process air channel may constitute a section of a process air circuit of the laundry treatment apparatus. If the process air duct is arranged in the laundry treatment apparatus as specified, the process air blower of the laundry treatment apparatus can be supplied with process air for drying laundry via the process air duct, for which purpose the section of the process air circuit provided with the heat pump condenser can be connected via the process air duct to the process air blower of the process air circuit.
According to one advantageous embodiment, the air guiding element is configured as a sheet or block. The air guiding element of both designs achieves approximately the same good results in the sense of the invention. For example, the sheet-like air guiding element may be configured as planar, curved, perforated, slotted, or the like. For example, the block-shaped air guiding elements may have a parabolic, semi-circular or semi-elliptical cross-section, which is oriented perpendicular to the chamber wall. Alternatively, the block-shaped air guiding element may have a polygonal, in particular triangular, quadrangular or trapezoidal cross section.
According to a further advantageous embodiment, the air guiding element is arranged on a chamber wall section opposite to an inflow section of the outlet chamber, through which process air flows into the outlet chamber, with respect to the axis of symmetry of the process air outlet. Studies have shown that the positioning of such air guiding elements is particularly effective. For example, the air guiding element may be arranged on the chamber wall in a region which extends over an angle of, for example, more than 180 °. For example, when the process air channel is arranged as prescribed in the laundry treatment device, this region of the chamber wall can be arranged on the side of the vertical plane facing away from the inflow section, which vertical plane contains the center axis of the process air outlet.
According to a further advantageous embodiment, the air guiding element is arranged at the level of the process air outlet when the process air channel is arranged in the laundry treatment device as specified. Studies have shown that the closer the air guiding element is to the height of the process air outlet, the better its effect. In this case, the height of the process air outlet is understood to be the geodetic height of the process air outlet when the process air channel is arranged in the laundry treatment apparatus as specified.
According to another advantageous embodiment, the air guiding element extends from the chamber wall to the process air outlet. The radial dimensions of the air guiding element should be chosen such that at least the radially outer part of the process air flowing into the outlet chamber is decelerated and split by the air guiding element.
According to a further advantageous embodiment, the process air channel also has at least one further air guiding element, which is arranged on the inner side of the chamber wall in a circumferentially offset manner relative to the air guiding element in the range of 20 ° to 180 ° in the direction of the lower region of the outlet chamber. Thereby, the effect of the present invention can be further improved. For example, the air guiding element may be arranged at the level of the process air outlet, while the further air guiding element may for example be arranged offset by 90 ° downwards relative to the air guiding element. For example, the two air guiding elements may also be arranged offset from each other by 120 °.
According to the present invention, there is also proposed a laundry treatment apparatus for drying laundry, comprising a process air channel and a process air blower connected downstream of the process air channel with respect to a process air flow flowing through the process air channel, wherein the process air channel is formed according to one of the above-mentioned designs or a combination of at least two designs with each other.
The advantages described above with reference to the process air channel are also relevant for laundry treatment devices accordingly. The laundry treating apparatus may be a front loading type washing machine. The laundry treatment apparatus may be a dryer or a laundry dryer.
Drawings
The invention is illustrated below with reference to a preferred embodiment in the drawings. In the accompanying drawings:
FIG. 1 shows a schematic view of a section of a process air circuit for one embodiment of a laundry treatment apparatus of the present invention;
FIG. 2 shows a schematic and perspective detail view of the process air channel shown in FIG. 1;
FIG. 3 shows a schematic and perspective detail view of a section of another embodiment of a process air channel of the present invention;
FIG. 4 shows a schematic and perspective detail view of a section of another embodiment of a process air channel of the present invention; and
fig. 5 shows a schematic and perspective detail view of a section of the embodiment shown in fig. 4.
Detailed Description
In the drawings, identical or functionally identical components are provided with identical reference numerals. Repeated descriptions of these components may be omitted.
Fig. 1 shows a schematic view of a section of a process air circuit for an embodiment of a laundry treatment apparatus 1 for drying laundry according to the present invention. Only one section of the process air circuit 2 of the laundry treatment apparatus 1 is shown in the figure, in which section the process air circulates during the drying process according to arrow P.
The process air circuit 2 has a section 3 which is connected to a drying chamber of a laundry treatment apparatus in which a not shown laundry drum is rotatably supported. The process air circuit 2 furthermore has a section 4 connected to the air circuit 3, on which an evaporator 5 and a condenser 6 of a heat pump 7 of the laundry treatment apparatus 1 are arranged. The process air circuit 2 furthermore has a process air channel 8 connected to the section 4 and a process air blower, not shown, which is connected downstream of the process air channel 8 with respect to the process air flow through the process air channel 8, indicated by the arrow P. The structure of the process air channel 8 will be described below with reference to fig. 2.
Fig. 2 shows a schematic view and a perspective detail view of the process air channel 8 shown in fig. 1. The process air channel 8 has a circular process air outlet 9, which can be connected to a process air blower, not shown, and is formed on a side wall 11, wherein a rotor 10 of the process air blower is shown. The figure shows the symmetry axis 16 of the process air outlet 9, which is perpendicular to the plane of the opening of the process air outlet 9 and in this embodiment is the same as the rotation axis of the rotor 10.
Furthermore, the process air channel 8 has an outlet chamber 12 connected upstream of the process air outlet 9. The outlet chamber 12 has an annular chamber wall 13 arranged coaxially to the process air outlet 9. In fig. 2, the process air channel 8 is shown as follows: process air flows from the process chamber (not shown) from left to right through the inflow section into the outlet chamber 12 and exits back through the process air outlet 9.
On the inner side 14 of the chamber wall 13, a radially inwardly extending sheet-like air guiding element 15 is arranged. The air guiding element 15 is arranged on a section of the chamber wall 13 opposite the inflow section on the left side of the outlet chamber 12 in fig. 2 with respect to the axis of symmetry 16 of the process air outlet 9. In particular, the air guiding element 15 is arranged at the level of the process air outlet 9, i.e. beside the process air outlet 9. The air guiding element 15 extends from the chamber wall 13 to the process air outlet 9 or to the edge of the circular opening of the process air outlet 9.
The process air channel 8 furthermore has a further air guiding element 17. The further air guiding element is arranged on the circumference of the inner side 14 of the chamber wall 13, offset by 90 ° from the air guiding element 15, more precisely in the direction of the lower region of the outlet chamber 12. The further air guiding element 17 is also arranged on a section of the chamber wall 13, which is located opposite the inflow section of the outlet chamber 12, with respect to the axis of symmetry 16 of the process air outlet 9. The further air guiding element 17 also extends from the chamber wall 13 to the process air outlet 9. However, the further air guiding element 17 is not arranged at the level of the process air outlet 9, but below the process air outlet 9.
Fig. 3 shows a schematic view and a perspective detail view of a section of another embodiment of a process air channel 18 for a not shown laundry treatment device for drying laundry.
The process air channel 18 differs from the embodiment shown in fig. 1 and 2 essentially in that the two air guiding elements 19 and 20 are configured in a block-like manner. For avoiding repetition, please refer to the description above for fig. 1 and 2.
Fig. 4 and 5 show schematic and perspective detailed views of a section of another embodiment of a process air channel 28 of the present invention for a laundry treatment apparatus for drying laundry, not shown in the figures.
The process air channel 28 differs from the embodiment shown in fig. 1 and 2 essentially in that the air guiding element 25 is constructed in the form of a rib which extends between the chamber wall 13 and the process air outlet 9 in such a way that it protrudes beyond the opening of the process air outlet. At the end facing away from the chamber wall, the rib is supported on a stabilizing ring 26, which is arranged here concentrically to the axis of rotation of the rotor (not shown). Hereby a spider web-like air guiding structure is obtained which combines an advantageous air guiding in the sense of the present invention with good mechanical stability.
For avoiding repetition, reference is made again to the description above for fig. 1 and 2.
List of reference numerals:
1 laundry treating apparatus
2 Process air Circuit
3 2 section
4 2 section
5 evaporator
6 condenser
7 heat pump
8 Process air channel
9 Process air outlet
10 rotor
11 8 side wall
12. Outlet chamber
13. Chamber wall
14 13, inner side surface of
15 air guiding element
16 9 symmetry axis
17. Another air-guiding element
18. Process air channel
19. Air guiding element
20. Another air-guiding element
25. Air guiding element
26. Stabilizing ring
28. Process air channel
P arrow (process gas flow).
Claims (8)
1. A process air channel (8, 18) of a laundry treatment apparatus (1) for drying laundry, wherein, when the process air channel (8, 18) is arranged in the laundry treatment apparatus (1) as specified, process air for drying laundry can be supplied to a process air blower of the laundry treatment apparatus (1) by means of the process air channel (8, 18), wherein the process air channel (8, 18) has a process air outlet (9) connectable to the process air blower and an outlet chamber (12) connected upstream of the process air outlet (9), wherein the outlet chamber (12) has a chamber wall (13) which is configured as a ring segment and is arranged coaxially to the process air outlet (9), characterized in that at least one air guiding element (15, 19) directed towards the process air outlet (9) is arranged between the chamber wall (13) and the process air outlet (9).
2. Process air channel (8, 18) according to claim 1, characterized in that the air guiding element (15, 19) is arranged extending substantially radially towards the process air outlet (9).
3. Process air channel (8, 18) according to claim 1 or 2, characterized in that the air guiding element (15, 19) is arranged on the inner side (14) of the chamber wall (13).
4. Process air channel (8, 18) according to one of the preceding claims, characterized in that the air guiding element (15, 19) is constructed as a sheet or block.
5. Process air channel (8, 18) according to one of the preceding claims, characterized in that the air guiding element (15, 19) is arranged on a section of the chamber wall (13) opposite the inflow section of the outlet chamber (12) with respect to the symmetry axis (16) of the process air outlet (9).
6. Process air channel (8, 18) according to one of the preceding claims, characterized in that the air guiding element (15, 19) extends from the chamber wall (13) to the process air outlet (9).
7. Process air channel (8, 18) according to one of the preceding claims, characterized in that it has at least one further air guiding element (17, 20) which is arranged on the inner side (14) of the chamber wall (13) in a direction in the range of 20 ° to 180 ° towards the lower region of the outlet chamber (12) circumferentially offset from the air guiding element (15, 19).
8. Laundry treatment apparatus (1) for drying laundry, having a process air channel (8, 18) and a process air blower connected downstream of the process air channel (8, 18) with respect to a process air flow through the process air channel (8, 18), characterized in that the process air channel (8, 18) is constructed in accordance with one of claims 1 to 7.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022208980.4 | 2022-08-30 | ||
| DE102022208980.4A DE102022208980A1 (en) | 2022-08-30 | 2022-08-30 | Process air duct and laundry treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117626612A true CN117626612A (en) | 2024-03-01 |
Family
ID=89844622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311086689.XA Pending CN117626612A (en) | 2022-08-30 | 2023-08-28 | Process air channel and laundry treatment device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN117626612A (en) |
| DE (1) | DE102022208980A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10125732B4 (en) | 2001-05-16 | 2006-02-23 | Hüttlin, Herbert, Dr. h.c. | Filter for dedusting of a particulate material containing process air in a process apparatus and such process apparatus |
| DE102012012511A1 (en) | 2011-07-22 | 2013-01-24 | BSH Bosch und Siemens Hausgeräte GmbH | Fan i.e. radial fan, for use in air guiding process of laundry dryer, has inflow cover including hole and nozzle in low pressure region of smallest specific volume flow, where hole and nozzle are aligned at inflow side of cover |
| CN204140495U (en) | 2014-10-10 | 2015-02-04 | 珠海格力电器股份有限公司 | A kind of centrifugal blower volute, centrifugal blower and air conditioner |
-
2022
- 2022-08-30 DE DE102022208980.4A patent/DE102022208980A1/en active Pending
-
2023
- 2023-08-28 CN CN202311086689.XA patent/CN117626612A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022208980A1 (en) | 2024-02-29 |
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