Mufflered line assembly, drying line assembly of a dishwasher, dishwasher
By incorporating a silencing cavity and a Helmholtz resonant silencer into the dishwasher's drying piping assembly, the problem of high drying noise in the dishwasher was solved, achieving effective noise reduction and structural compactness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-21
AI Technical Summary
Existing dishwashers are noisy during the drying process, especially due to the unresolved noise issues caused by their multi-channel design and elevated sound-absorbing channels.
A silencing chamber is set in the drying pipe assembly of the dishwasher, and a Helmholtz resonance silencer is formed in the silencing chamber. The silencing frequency is adjusted by the adjacent parts and separators of the silencing channel to reduce noise.
It effectively reduces noise during the dishwasher drying process, and has a compact structure with low modification costs.
Smart Images
Figure CN224523060U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dishwashers, and more particularly to a noise-reducing pipe assembly for a dishwasher. Background Technology
[0002] Dishwashers use fans to drive airflow for drying, which inherently generates noise. Furthermore, to ensure thorough drying within the washing chamber, multiple drying channels are typically used, usually dual or triple channels, to guarantee even distribution of the drying air throughout the dishwasher's cavity. Figure 1 The diagram illustrates two drying channels 2' in an existing dishwasher. Multiple drying channels complicate the airflow from the fan, and water vapor is generated during dishwasher washing. To prevent water vapor from flowing back into the drying channels, a raised upper silencing channel is typically designed, such as... Figure 1 The upper drying channel is designed to be suspended. This suspended design will increase the noise problem of the dishwasher. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the defect of high drying noise in the prior art of dishwashers, and to provide a noise-reducing pipe assembly, a drying pipe assembly for a dishwasher, and a dishwasher.
[0004] The present invention solves the above-mentioned technical problems through the following technical solution:
[0005] A noise-absorbing conduit assembly includes at least two noise-absorbing channels adjacent to each other, the conduit assembly further includes a noise-absorbing cavity formed at the adjacent locations, and at least one of the noise-absorbing channels has a connecting hole at the adjacent locations that communicates with the noise-absorbing cavity to form a Helmholtz resonant silencer at the noise-absorbing cavity.
[0006] In this design, silencing cavities are set at the junctions of multiple silencing channels, and Helmholtz resonant silencers are formed at these silencing cavities. This allows noise flowing through the silencing channels to be eliminated within the silencing cavities. When used in the drying duct assembly of a dishwasher, this reduces noise during the drying process. The placement of the silencing cavities at the junctions of the silencing channels contributes to the compact structure of the duct assembly.
[0007] Preferably, the piping assembly further includes a separator disposed within the silencing cavity and dividing the silencing cavity into sub-cavities. At least one silencing channel and a corresponding sub-cavity are disposed within the silencing cavity. The sub-cavity is disposed within the silencing cavity close to the corresponding silencing channel and is connected to the corresponding silencing channel through a connecting hole on the corresponding silencing channel, so as to form the Helmholtz resonance silencer at the sub-cavity.
[0008] In this scheme, a separator is set up, which can be used to adjust the volume of the sub-cavity, thereby adjusting the silencing frequency of the Helmholtz resonance silencer formed at the sub-cavity.
[0009] Preferably, the sub-cavities and the silencing channels are configured in a one-to-one correspondence.
[0010] Preferably, the wall surface of the connecting hole is used to form the silencing cavity in the formation of the silencing channel.
[0011] In this design, the sound-absorbing cavity and the sound-absorbing channel share the same wall, which can further improve the compactness of the structure.
[0012] Preferably, at least two of the silencing channels are arranged at an angle at their adjacent locations, and the silencing cavity is located at the angle.
[0013] Preferably, the number of the silencing channels is two, and the pipeline assembly includes a first part and a second part, which are sealed together to jointly enclose the silencing channels and the silencing cavity.
[0014] Preferably, there are two silencing channels, which are arranged at an angle at their adjacent points and form the silencing cavity at the angle. The walls of both silencing channels have the connecting holes formed at their adjacent points.
[0015] The piping assembly also includes a separator, which is disposed within the silencing cavity and divides the silencing cavity into two sub-cavities. The sub-cavities and the silencing channels are arranged in a one-to-one correspondence. The sub-cavities are connected to the corresponding silencing channels through the connecting holes on the corresponding silencing channels, so as to form the Helmholtz resonance silencer at the sub-cavities.
[0016] A drying pipe assembly for a dishwasher includes a sound-absorbing pipe assembly as described in any of the above technical solutions. The pipe assembly further includes a main channel, which branches off at least two sound-absorbing channels at a branch point. At least one of the sound-absorbing channels branched off from the main channel communicates with the sound-absorbing cavity at the branch point to form the Helmholtz resonance silencer.
[0017] In this solution, noise will be reflected at the duct branch point. Setting the silencing cavity at the branch point and forming a Helmholtz resonance silencer at the branch point is more conducive to noise reduction and has a better noise reduction effect.
[0018] A dishwasher includes a fan and a washing chamber, and also includes a drying pipe assembly as described in any of the above technical solutions. The main channel, the silencing channel, and the washing chamber are connected in sequence. At least two of the silencing channels are connected to the washing chamber at different locations. The fan outlet is connected to the upstream of the main channel or the fan is disposed within the main channel.
[0019] Preferably, the two silencing channels are a first channel and a second channel, the connection point between the second channel and the dishwashing cavity is higher than the connection point between the first channel and the dishwashing cavity, the second channel has a first extension section and a second extension section connected in sequence, the first extension section is connected to the main channel and extends upward, and the second extension section extends downward.
[0020] A dishwasher includes a fan and a washing chamber, and further includes a noise-absorbing piping assembly as described in any of the above technical solutions, wherein the outlet of the fan, the noise-absorbing channel, and the washing chamber are sequentially connected, and at least two of the noise-absorbing channels and the washing chamber are connected at different locations in the washing chamber.
[0021] In this solution, the existing drying pipe assembly of the dishwasher can be improved by adding connecting holes to form a Helmholtz resonance silencer for noise reduction, which has a low modification cost.
[0022] The positive and progressive effects of this utility model are as follows:
[0023] A silencing cavity is set at the junction of multiple silencing channels, and a Helmholtz resonance silencer is formed at the silencing cavity. This allows the noise flowing through the silencing channel to enter the silencing cavity for elimination, reducing the noise during the dishwasher drying process. The silencing cavity is set at the junction of the silencing channels, making the piping assembly structure compact.
[0024] The existing dishwasher's drying pipe assembly can be improved by adding connecting holes to form a Helmholtz resonance silencer for noise reduction, resulting in low modification costs. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the drying channel of an existing dishwasher;
[0026] Figure 2 This is a schematic diagram of a pipeline assembly according to an embodiment of the present invention;
[0027] Figure 3 This is a schematic diagram of the sound-absorbing cavity according to an embodiment of the present invention;
[0028] Figure 4 This is a schematic diagram of a dishwasher according to an embodiment of the present invention.
[0029] Explanation of reference numerals in the attached figures:
[0030] Main Channel 1;
[0031] Silencing channel 2;
[0032] First Channel 21;
[0033] Second channel 22, first extension 221, second extension 222;
[0034] Silencing cavity 3, first sub-cavity 31, second sub-cavity 32;
[0035] Connecting hole 4, first connecting hole 41, second connecting hole 42;
[0036] Separator 5;
[0037] Deflector 6, first deflector 61, second deflector 62. Detailed Implementation
[0038] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.
[0039] This embodiment provides a dishwasher. Figures 2-4 This is a schematic diagram of this embodiment.
[0040] The dishwasher includes a fan, a washing chamber, and a drying tubing assembly. The drying tubing assembly includes... Figure 2 , Figure 3 This section of the piping assembly is shown in the diagram. For example... Figure 2 , Figure 3 The piping assembly includes a main channel 1 and two silencer channels 2. The main channel 1 branches into the two silencer channels 2, which are designated as channel 21 and channel 22, respectively. The fan outlet, main channel 1, silencer channels 2, and washing chamber are sequentially connected. Air is blown into the washing chamber by the fan to dry the washing chamber and the dishes inside. Figure 4 The two noise-reducing channels 2 are connected to the washing chamber at different locations within the washing chamber, allowing for multiple air intakes and improving the uniformity of air intake and drying. In other embodiments, if the dishwasher uses an axial flow fan, the fan can also be located within the main channel 1.
[0041] like Figure 2 , Figure 3The piping assembly also includes a silencing cavity 3, which is located at the junction of two silencing channels 2. The first channel 21 has a connecting hole 4 formed on its wall at the junction, serving as the first connecting hole 4. The second channel 22 also has a connecting hole 4 formed on its wall at the junction, serving as the second connecting hole 4. Both the first and second connecting holes 4 communicate with the silencing cavity 3, forming a Helmholtz resonance silencer within the silencing cavity 3. This allows noise flowing through the silencing channels 2 to enter the silencing cavity 3 for elimination, reducing noise during the dishwasher drying process. The silencing cavity 3's location at the junction of the silencing channels 2 makes the piping assembly structure compact. In other embodiments, all of the silencing channels 2 can be used, or only a portion of the silencing channels 2 can be connected to the silencing cavity 3 for noise reduction.
[0042] like Figure 2 , Figure 3 The two silencing channels 2 are arranged at an angle at their adjacent points, and the silencing cavity 3 is located at the angle, which can further improve the compactness of the structure. Figure 2 , Figure 3 The silencing channel 2 is used to form the wall of the connecting hole 4 and also to form the silencing cavity 3, so that the silencing cavity 3 and the silencing channel 2 share the same wall, which can further improve the compactness of the structure.
[0043] In other embodiments, a main channel 1 can be set to branch out to form multiple silencing channels 2, or a main channel 1 can be omitted and multiple silencing channels 2 can be arranged between each other; the silencing channels 2 can share a wall surface at adjacent points or can be completely separated; the silencing channels 2 and the silencing cavity 3 can share a wall surface, or can be connected by an additional connecting pipe, and the channel in the connecting pipe can be used as a connecting hole 4.
[0044] like Figure 2 , Figure 3 The piping assembly also includes a separator 5, which is disposed within the anechoic chamber 3, dividing the anechoic chamber 3 into two sub-cavities: a first sub-cavity 31 corresponding to the first channel 21 and a second sub-cavity 32 corresponding to the second channel 22. The first sub-cavity 31 is positioned close to the first channel 21 and connected to it via a first connecting hole 4, forming a Helmholtz resonant silencer at the first sub-cavity 31. The second sub-cavity 32 is positioned close to the second channel 22 and connected to it via a second connecting hole 4, forming another Helmholtz resonant silencer at the second sub-cavity 32. This achieves anechoic suppression of two main frequencies, improving noise reduction. The separator 5 allows for adjustment of the sub-cavity volume, thereby adjusting the anechoic suppression frequency. In other embodiments, when the separator 5 divides the anechoic chamber 3 into multiple chambers, some or all of the chambers can be configured as sub-cavities with anechoic suppression functions. In other embodiments, a silencing channel 2 can be provided to correspond to one or more sub-cavities, and one or more connecting holes 4 can be provided on a silencing channel 2 to connect to a corresponding sub-cavity.
[0045] The resonant frequency fr of a Helmholtz resonant silencer, which is also the silencing frequency, can be expressed as:
[0046]
[0047] Where Co is the speed of sound; V is the cavity volume; L is the length of the connecting pipe; S is the cross-sectional area of the connecting pipe; and δ is the acoustic end correction. In this embodiment, both connecting holes 4 are connecting pipes.
[0048] like Figure 3 The diameter of the first connecting hole 4 is d1, and the corresponding cross-sectional area is S1. The extension length of the first connecting hole 4 from the first channel 21 to the silencing cavity 3 is t1, and the volume of the first sub-cavity 31 is V1. When L = t1, S = S1, and V = V1, the silencing frequency f1 = fr corresponding to the first sub-cavity 31 can be obtained.
[0049] like Figure 3 The diameter of the second connecting hole 4 is d2, and the corresponding cross-sectional area is S2. The extension length of the second connecting hole 4 from the first channel 21 to the silencing cavity 3 is t2, and the volume of the second sub-cavity 32 is V2. Taking L = t2, S = S2, and V = V2, the silencing frequency corresponding to the second sub-cavity 32 can be obtained as f2 = fr.
[0050] Because the two silencing channels 2 are set up differently, the airflow resistance inside them is different, resulting in different noise levels. The silencing frequencies of the two sub-cavities can be adjusted by changing the position and wall thickness of the separator 5, thereby adjusting parameters such as V1 and V2, and by adjusting the cross-sectional area and extension length of the two connecting holes 4. The position and wall thickness of the separator 5 can be adjusted according to the silencing frequency and processing requirements.
[0051] like Figure 2 , Figure 3 The main channel 1 is split into two silencing channels 2. Noise will be reflected at the split point of the pipeline. In this embodiment, the silencing cavity 3 is set at the split point. The formation of a Helmholtz resonance silencer at the split point is more conducive to noise reduction and the noise reduction effect is better.
[0052] like Figure 4 In this embodiment, the connection between the first channel 21 and the washing cavity is lower than the connection between the second channel 22 and the washing cavity. Figure 2 The perspective shown in the text is basically a level view, such as Figure 2The second channel 22 has a first extension section 221 and a second extension section 222 connected in sequence. The first extension section 221 is connected to the main channel 1 and extends upward, while the second extension section 222 extends downward. By setting the first extension section 221 and the second extension section 222, the second channel 22 is raised, which can prevent water vapor from flowing back into the silencing channel 2 and the main channel 1 during the washing process in the dishwashing cavity.
[0053] like Figure 2 , Figure 3 In the piping assembly, two guide plates 6 are installed inside the pipe to divert the flow. The first guide plate 6 forms the wall of the first channel 21, and the second guide plate 6 forms the wall of the second channel 22. The first and second guide plates 6 together form a triangular silencing cavity 3. A first connecting hole 4 is provided on the first guide plate 6, and the second guide plate 6 is provided on the second connecting hole 4. Figure 1 Compared with the existing structure shown, in this embodiment, only a connecting hole 4 needs to be opened on the first guide plate 6 and the second guide plate 6 to form a Helmholtz resonance silencer for noise reduction, which has low modification cost.
[0054] The piping components in this embodiment, Figure 2 , Figure 3 The diagram illustrates the first part of the piping assembly, which also includes a second part. The second part is sealed over the first part, and together with the first part, they form a sound-absorbing channel 2, a main channel 1, and a sound-absorbing cavity 3. The sealing connection between the first and second parts can be achieved by methods including, but not limited to, adhesive bonding and heat fusion. In this embodiment, a connecting hole 4 is provided on the first part. In other embodiments, grooves can be formed on both the first and second parts, with the openings of the two grooves facing each other to form the connecting hole 4.
[0055] In addition to being used in dishwashers, the noise-absorbing pipe assembly of this utility model can also be used in other home appliances for noise reduction. The specific settings of the noise-absorbing channel 2, noise-absorbing cavity 3, etc. in the pipe assembly can be adjusted according to application requirements.
[0056] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.
Claims
1. A noise-absorbing conduit assembly comprising at least two noise-absorbing channels adjacent to each other, characterized in that, The piping assembly further includes a silencing cavity formed at the adjacent location, and at least one of the silencing channels has a connecting hole at the adjacent location that communicates with the silencing cavity, so as to form a Helmholtz resonance silencer at the silencing cavity.
2. The noise-absorbing piping assembly as described in claim 1, characterized in that, The piping assembly further includes a separator disposed within the silencing cavity and dividing the silencing cavity into sub-cavities. At least one silencing channel and a sub-cavity are correspondingly disposed. The sub-cavities are disposed within the silencing cavity close to the corresponding silencing channel and are connected to the corresponding silencing channel through the connecting hole on the corresponding silencing channel, so as to form the Helmholtz resonance silencer at the sub-cavity.
3. The noise-absorbing piping assembly as described in claim 2, characterized in that, The sub-cavities and the silencing channels are configured in a one-to-one correspondence.
4. The noise-absorbing piping assembly as described in claim 1, characterized in that, The wall surface of the connecting hole is used to form the silencing cavity in the formation of the silencing channel; And / or, at least two of the silencing channels are arranged at an angle at their adjacent locations, and the silencing cavity is located at the angle.
5. The noise-absorbing piping assembly as described in claim 1, characterized in that, The number of the silencing channels is two, and the pipeline assembly includes a first part and a second part, which are sealed together to jointly enclose the silencing channels and the silencing cavity.
6. The noise-absorbing piping assembly as described in claim 1, characterized in that, The number of the silencing channels is two, and the two silencing channels are arranged at an angle at their adjacent points, forming the silencing cavity at the angle. The walls of the two silencing channels are each formed with a connecting hole at their adjacent points. The piping assembly also includes a separator, which is disposed within the silencing cavity and divides the silencing cavity into two sub-cavities. The sub-cavities and the silencing channels are arranged in a one-to-one correspondence. The sub-cavities are connected to the corresponding silencing channels through the connecting holes on the corresponding silencing channels, so as to form the Helmholtz resonance silencer at the sub-cavities.
7. A drying pipe assembly for a dishwasher, characterized in that, It includes a silencing conduit assembly as described in any one of claims 1-6, the conduit assembly further including a main channel, the main channel branching out at least two of the silencing channels at a branch point, at least one of the silencing channels branching out from the main channel communicating with the silencing cavity at the branch point to form the Helmholtz resonance silencer.
8. A dishwasher comprising a fan and a washing chamber, characterized in that, It also includes the drying duct assembly of the dishwasher as described in claim 7, wherein the main channel, the silencing channel, and the washing chamber are connected in sequence, at least two of the silencing channels are connected to the washing chamber at different locations, and the fan outlet is connected to the upstream of the main channel or the fan is disposed in the main channel.
9. The dishwasher as described in claim 8, characterized in that, The two silencing channels are a first channel and a second channel, respectively. The connection between the second channel and the dishwashing cavity is higher than the connection between the first channel and the dishwashing cavity. The second channel has a first extension section and a second extension section connected in sequence. The first extension section is connected to the main channel and extends upward, while the second extension section extends downward.
10. A dishwasher comprising a fan and a washing chamber, characterized in that, It also includes a silencing piping assembly as described in any one of claims 1-6, wherein the outlet of the fan, the silencing channel, and the washing chamber are sequentially connected, and at least two of the silencing channels and the washing chamber are located at different parts of the washing chamber.