Noise reducer and household appliance with same

Abstract

The utility model relates to the technical field of household appliances, in particular to a denoiser and a household appliance with the denoiser, and aims to solve the problems that in the prior art, pulse type water outlet of a table type water purifying and drinking machine can generate noise, and parts at the downstream of a booster pump are prone to being damaged. In order to achieve the purpose, the noise reducer comprises a shell and a noise reduction component arranged in the shell, the shell is provided with a water inlet and a water outlet, the diameter of the end, close to the water inlet, of the noise reduction component is smaller than that of the end, close to the water outlet, of the noise reduction component, and a water flow channel is formed between the noise reduction component and the inner wall of the shell. According to the noise reducer, the diameter of the end, close to the water inlet, of the noise reduction component is smaller than that of the end, close to the water outlet, of the noise reduction component, the water flow speed can be reduced, water flow becomes slow, noise can be effectively reduced, and the failure rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, and particularly provides a noise reducer and a household appliance with the noise reducer. Background Art

[0002] With the increasing living standards of people, water purifiers are used more and more widely, especially water purifying and drinking machines. The water purifying and drinking machines can purify and heat tap water, and the water treated by the water purifying and drinking machines can be directly drunk. Currently, the more common one is the desktop water purifying and drinking machine, which is usually installed on the tabletop for the convenience of users to obtain drinking water. The purification method of the desktop water purifying and drinking machine is generally reverse osmosis filtration. A booster pump is installed inside for pressurized filtration. The booster pump raises the pressure of tap water above the natural osmotic pressure, and presses the water molecules in the raw water to the other side of the reverse osmosis membrane, so as to achieve the purpose of removing salts in the water and purifying tap water. The booster pump is generally a pulsating booster pump, and the filtered water flows out in a pulsating manner, resulting in relatively large noise and easily causing damage to downstream components. In this case, the desktop water purifying and drinking machine installed on the tabletop is relatively close to the user, resulting in particularly loud noise during its operation.

[0003] Correspondingly, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model

[0004] The utility model aims to solve the above technical problems, that is, to solve the problems that the pulsating water output of the desktop water purifying and drinking machine in the prior art generates noise and easily causes damage to the components downstream of the booster pump.

[0005] In a first aspect, the utility model provides a noise reducer for a household appliance with a water pump. The noise reducer includes a housing and a noise reduction member disposed inside the housing. The housing has a water inlet and a water outlet. Water flows into the housing through the water inlet and then flows out of the housing through the water outlet. The diameter of the end of the noise reduction member close to the water inlet is smaller than the diameter of the end close to the water outlet. A water flow channel is formed between the noise reduction member and the inner wall of the housing.

[0006] In the preferred technical solution of the above noise reducer, the diameter of the noise reduction member gradually increases along the water flow direction inside the housing.

[0007] In the preferred technical solution of the above noise reducer, the inner diameter of at least the part of the housing corresponding to the noise reduction member gradually increases along the water flow direction.

[0008] In the preferred technical solution of the above noise reducer, a first groove is provided on the outer wall of the noise reduction member, at least a part of the first groove is arranged along the water flow direction in the housing, and a water flow channel is formed between the first groove and the inner wall of the housing.

[0009] In the preferred technical solution of the above noise reducer, the first groove is a spiral groove extending circumferentially along the outer wall of the noise reduction member.

[0010] In the preferred technical solution of the above noise reducer, the number of the spiral grooves is multiple.

[0011] In the preferred technical solution of the above noise reducer, the noise reducer further includes an elastic member, the elastic member is arranged in the housing, the elastic member is located on a side of the noise reduction member away from the water inlet, and the elastic member is configured to be able to expand or be compressed axially along the housing to allow the noise reduction member to displace axially along the housing.

[0012] In the preferred technical solution of the above noise reducer, an installation structure is provided at a position in the housing close to the water outlet, a first end of the elastic member is connected to the installation structure, a through hole is provided on the installation structure, and through the through hole, the area where the elastic member is located can be communicated with the water outlet and the water flow channel. When the elastic member is compressed, a second end of the elastic member abuts against an end of the noise reduction member away from the water inlet.

[0013] In the preferred technical solution of the above noise reducer, an end of the noise reduction member facing the water inlet is recessed inward to form a second groove.

[0014] In the technical solution of the present utility model, the noise reducer includes a housing and a noise reduction member disposed within the housing. The housing has a water inlet and a water outlet. The diameter of the end of the noise reduction member close to the water inlet is smaller than the diameter of the end close to the water outlet. A water flow channel is formed between the noise reduction member and the inner wall of the housing. In this way, after the water flow enters the housing through the water inlet, it will flow towards the water outlet through the water flow channel between the noise reduction member and the inner wall of the housing. During the flow process, under the blocking effect of the noise reduction member, the speed of the water flow will decrease. Especially when the water flow enters the housing in a pulsed manner, the setting of the noise reduction member can slow down the water flow and shorten the interval between two pulses, thereby reducing the impact sound of the pulsed water flow and effectively reducing the noise. Moreover, the diameter of the end of the noise reduction member close to the water inlet is smaller than the diameter of the end close to the water outlet, so at least a part of the outer wall of the noise reduction member forms a buffer surface. The water flow hitting the buffer surface can further slow down the flow rate and make the water flow more stable. In this way, the water flow coming out of the noise reducer is relatively gentle and will not form pulsed water hammer at its downstream end, effectively avoiding damage to the components at its downstream end, effectively reducing the failure rate of household appliances, and extending the service life.

[0015] Furthermore, the diameter of the noise reduction member gradually increases along the water flow direction within the housing. That is to say, the outer wall of the noise reduction member is a conical surface, and this conical surface serves as the buffer surface. In this way, there is a larger wall surface to receive the high-pressure water flow that has just entered the housing, thereby being able to better slow down the water flow speed and reduce the noise. Moreover, the conical surface is relatively smooth, which can make the water flow hitting it become more stable and gentle, effectively avoiding the occurrence of pulsed water hammer formed by the pulsed water flow and then causing damage to related components.

[0016] Furthermore, a first groove is provided on the outer wall of the noise reduction member, and at least a part of the first groove is arranged along the water flow direction within the housing. In this way, when the water flow enters the housing, at least a part of it will flow towards the water outlet through the first groove. Under the action of the first groove, at least a part of the water flow can be dispersed and the water flow speed can be slowed down, thereby being able to better reduce the noise.

[0017] Further, the noise reduction member further includes an elastic member, which is disposed inside the housing and on the side of the noise reduction member away from the water inlet. The elastic member is configured to be able to extend or be compressed along the axial direction of the housing to allow the noise reduction member to displace along the axial direction of the housing. When water flows into the housing, the water flow rate is large, and an external force is applied to the noise reduction member, causing it to displace in the direction away from the water inlet along the water flow direction. The elastic member is compressed, and the distance between the noise reduction member and the inner wall of the housing increases, and the water flow channel inside the housing increases, allowing the water flow to pass through as soon as possible. When the water flow rate decreases, the elastic member extends along the axial direction of the housing under the action of its own elastic force to return to its original position, and the noise reduction member displaces in the direction close to the water inlet under the action of the elastic member to return to its original position. In this way, under the synergistic action of the noise reduction member and the elastic member, the position of the noise reduction member inside the housing can be automatically adjusted according to the size of the water flow rate, and thus the size of the water flow channel can be adjusted. In this way, even if the water flow entering the housing from the water inlet is a pulsed water flow or the water flow rate fluctuates greatly, the water flow speed can be effectively slowed down and the noise can be reduced.

[0018] In a second aspect, the present utility model further provides a household appliance, which includes a water pump and the noise reducer according to any one of the foregoing solutions.

[0019] It should be noted that the household appliance has all the technical effects of the foregoing noise reducer and will not be elaborated herein. Description of the Drawings

[0020] Next, taking a water purifier as an example and in combination with the drawings, the preferred embodiments of the present utility model will be described. In the drawings:

[0021] Figure 1 is a structural diagram (one) of a noise reducer according to an embodiment of the present utility model;

[0022] Figure 2 is a structural diagram (two) of a noise reducer according to an embodiment of the present utility model;

[0023] Figure 3 is Figure 2 a cross-sectional view taken along the A-A plane in

[0024] Figure 4 is an exploded view of a noise reducer according to an embodiment of the present utility model;

[0025] Figure 5 is a structural diagram (one) of a noise reduction member according to an embodiment of the present utility model;

[0026] Figure 6 is a structural diagram (two) of a noise reduction member according to an embodiment of the present utility model.

[0027] List of reference signs:

[0028] 1. Housing; 11. Water inlet; 12. Water outlet; 13. First part; 131. Internal thread; 14. Second part; 141. External thread; 142. Cylindrical structure; 2. Noise reduction member; 21. Spiral groove; 22. Mounting hole; 23. Conical groove; 24. Second groove; 25. Reinforcing rib; 3. Spring; 4. First joint; 5. Second joint. Detailed implementation manners

[0029] The preferred implementation manners of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model. It should be noted that although the desktop water purifier is taken as an example for illustration in this embodiment, it can obviously also be arranged in other types of household appliances such as ordinary water purifiers and dishwashers.

[0030] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In addition, it should also be noted that in the description of this application, unless otherwise clearly specified and defined, the terms "connected" and "joined" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0032] At present, desktop water purifiers usually use pulsating booster pumps to achieve pressurized filtration. However, the noise generated during the operation of pulsating booster pumps is relatively large, and the noise reduction effect achieved by increasing the booster chamber is limited at present. The pulsating water output method is also prone to generating noise and will form pulsating water hammers on the downstream components, resulting in damage to these components and further causing failures of the desktop water purifier. For this reason, a noise reduction component is provided inside the housing of the noise reducer of this application, a water flow channel is formed between the noise reduction component and the housing, and the diameter of the end of the noise reduction component close to the water inlet is smaller than the diameter of the end close to its water outlet. Using this noise reducer can effectively reduce the water flow velocity, reduce the impact sound of the pulsating water flow, make the water flow stable, thereby effectively reducing the noise, and can avoid forming pulsating water hammers on the downstream side, effectively reducing the failure rate of the desktop water purifier.

[0033] The following will refer to Figures 1 to 6 to describe possible implementation methods of the noise reducer of the present utility model.

[0034] As Figures 1 to 4 shown and in the orientation as Figure 3 shown, the desktop water purifier includes a housing (not shown), a pulsating booster pump (not shown) and a filtration assembly (not shown) provided inside the housing. The housing has an inlet and an outlet, and the inlet is connected to an external water source (such as a tap water network). The pulsating booster pump is communicated with the inlet, and the water flow coming in from the inlet can be pressurized through the pulsating booster pump, and then discharged through the filtration assembly and out through the outlet after filtration. A noise reducer is provided at the outlet of the pulsating booster pump. The noise reducer includes a housing 1 and a noise reduction component 2. The housing 1 is generally a hollow structure and has a water inlet 11 and a water outlet 12. The noise reduction component 2 is provided inside the housing 1. The end of the noise reduction component 2 facing the water inlet 11 is a closed end. A water flow channel is formed between the noise reduction component 2 and the inner wall of the housing 1 to allow water flow through, and the diameter of the end of the noise reduction component 2 close to the water inlet 11 (roughly Figure 3 the right end in Figure 3The diameter of the left end in). In this way, after the water flow coming out of the outlet of the pulsating booster pump enters the housing 1 through the water inlet 11, it flows through the water flow channel between the noise reduction member 2 and the inner wall of the housing 1 to the water outlet 12. During the flow process, under the blocking action of the water flow noise reduction member 2, the speed will decrease and the water flow will slow down. When part of the water flow of the previous pulse still remains in the housing 1, the water flow of the next pulse has already arrived. This is equivalent to shortening the interval between two pulses, thereby being able to reduce the impact sound of the pulsating water flow and effectively reducing the noise. Moreover, since the diameter of the noise reduction member 2 changes along the diameter of the water flow direction in the housing 1, and the diameter of the end portion close to the water inlet 11 is smaller than the diameter of the end portion close to the water outlet 12, then at least a part of the outer wall of the noise reduction member 2 forms a buffer surface. This buffer surface can be a conical surface, a curved surface or a flat surface, etc. The water flow hitting the buffer surface can further slow down the flow rate and make the water flow more stable. In this way, the water flow coming out of the pulsating booster pump becomes relatively gentle after flowing through this noise reducer and will not form a pulsating water hammer at its downstream end, thus effectively avoiding damage to the components at its downstream end, effectively reducing the failure rate of the tabletop water purifier and extending its service life.

[0035] It should be noted that the filtration component of the tabletop water purifier can adopt any one or more filtration membranes or other filtration parts that can realize the filtration function on the current market, and there is no limitation in this embodiment.

[0036] It should be noted that the booster pump in the tabletop water purifier can also be other types of booster pumps except the pulsating booster pump. For example, a self-priming pump, a centrifugal pump, a diaphragm pump, etc. Without departing from the basic principle of the present application, those skilled in the art can flexibly select the type of the booster pump of the tabletop water purifier according to the specific application scenario, as long as the normal filtration function of the tabletop water purifier can be realized.

[0037] It should be noted that in this embodiment, the water flow direction in the housing 1 is generally Figure 3 the direction from right to left along the horizontal direction in.

[0038] Such as Figures 1 to 4 shown and in accordance with Figure 3In the shown orientation, the diameter of the noise reduction member 2 gradually increases along the water flow direction within the housing 1. That is to say, the noise reduction member 2 is generally a horizontally placed conical structure, and the diameter of this conical structure gradually increases along the direction from right to left. The housing 1 includes a first part 13 and a second part 14 which are connected to each other. Both the first part 13 and the second part 14 are generally hollow structures. The noise reduction member 2 is located within the first part 13. The water inlet 11 is provided at the right end of the first part 13, and the water outlet 12 is provided at the left end of the second part 14. An internal thread 131 is provided on the inner wall at the left end of the first part 13, and an external thread 141 is provided on the outer wall at the right end of the second part 14. The second part 14 is connected to the first part 13 in a matching manner through the cooperation of the internal thread 131 and the external thread 141, meaning that the first part 13 and the second part 14 are connected together by screwing. During assembly, the noise reduction member 2 is placed within the first part 13, and then the second part 14 is screwed to the first part 13, thus setting the noise reduction member 2 within the housing 1. When assembled, there is a distance between the end of the noise reduction member 2 facing away from the water inlet 11 (roughly the Figure 3 left end of the noise reduction member 2 in Figure 3 ) and the end of the second part 14 facing the noise reduction member 2 (roughly the

[0039] right end of the second part 14 in

[0040] The second part 14 is generally a straight pipe section. The inner diameter and outer diameter of the part of the first part 13 corresponding to the noise reduction member 2 gradually increase along the water flow direction. The changing trends of the inner diameter and outer diameter of this part are generally the same as the changing trend of the diameter of the noise reduction member 2. In this way, when observing along the water flow direction within the housing 1, the size of the water flow channel formed between the noise reduction member 2 and the inner wall of this part of the first part 13 is basically unchanged. In this way, through the conical noise reduction member 2 and the setting method of the gradually increasing inner diameter of the first part 13, a conical surface is formed at the position near the water inlet 11. This conical surface can serve as a buffer surface to buffer the high-pressure water flow that has just entered the housing 1. The wall surface of the conical surface is large and relatively smooth, which can effectively slow down the water flow speed, reduce noise, and make the water flow hitting it become more stable and gentle, thereby effectively avoiding the occurrence of pulse water hammer formed by pulsed water flow and further causing damage to related components.

[0041] It should be noted that the diameter of the noise reduction component 2 may not gradually increase along the direction of the water flow in the housing 1, but may be arranged in other ways. For example, the noise reduction component 2 is composed of two cylindrical sections connected to each other and having different diameters, and the diameter of the cylindrical section near the water inlet 11 is smaller than the diameter of the cylindrical section near the water outlet 12. For another example, the noise reduction component 2 is composed of multiple cylindrical sections connected to each other and having different diameters. These multiple short cylindrical sections can be arbitrarily arranged along the direction of the water flow in the housing 1, as long as the diameter of the cylindrical section near the water inlet 11 is smaller than the diameter of the cylindrical section near the water outlet 12. Without departing from the basic principles of the present application, those skilled in the art can flexibly select the specific arrangement of the noise reduction component 2 according to the specific application scenario, as long as the noise reduction component 2 can slow down the water flow speed and reduce the noise.

[0042] It should be noted that the first part 13 and the second part 14 can also be connected to each other by other possible means such as plug-in, snap-on, magnetic adsorption, bonding, etc. Of course, the first part 13 and the second part 14 can also be arranged in other forms, as long as the first part 13 and the second part 14 are easy to assemble and the noise reduction component 2 can be arranged therein.

[0043] like Figures 1 to 4 As shown and in accordance with Figure 3 In the orientation shown, a first groove is arranged on the outer wall of the noise reduction member 2, and the first groove is a spiral groove 21 extending along the circumference of the outer wall of the noise reduction member 2, and the first end of the spiral groove 21 is arranged near the end of the noise reduction member 2 facing the water inlet 11, and the second end is arranged near the end of the noise reduction member 2 facing the water outlet 12. The outer wall of the noise reduction member 2 abuts against the inner wall of the first part 13, so that a spiral water flow channel is formed between the spiral groove 21 and the inner wall of the first part 13. The water flows through the spiral water flow channel to the water outlet 12, which can better disperse the water flow. At the same time, the speed can be better reduced by colliding with the wall surface of the first groove and turning the flow at multiple bends. The characteristic of the spiral shape can extend the length of the water flow channel as much as possible, so that the water flow speed can be better slowed down, the impact sound of the pulsed water flow can be reduced, and the noise can be better reduced.

[0044] Continue to refer to Figures 1 to 4 , three spiral grooves 21 are arranged on the outer wall of the noise reduction component 2, and the three spiral grooves 21 respectively form spiral water flow channels with the inner wall of the first part 13, and the water flow from the water inlet 11 flows into the three spiral water flow channels respectively, and is better dispersed, so that the water flow speed can be better slowed down. Obviously, the number of spiral grooves 21 arranged on the outer wall of the noise reduction component 2 can also be two, four, five or more. Of course, only one spiral groove 21 can also be arranged on the outer wall of the noise reduction component 2.

[0045] It should be noted that the first groove can also be set in other shapes. For example, a strip-shaped groove extending along the water flow direction, or a curved groove extending along the outer wall surface of the noise reduction member 2, etc. Of course, the first groove may not be provided on the outer wall of the noise reduction member 2, and the water flow channel is formed by the gap between the outer wall of the noise reduction member 2 and the inner wall of the first part 13. Without departing from the basic principle of the present application, those skilled in the art can flexibly select according to specific application scenarios, as long as a water flow channel is formed between the noise reduction member 2 and the inner wall of the first part 13.

[0046] Of course, the outer wall of the noise reduction member 2 may not be in contact with the inner wall of the first part 13, and there is a distance between the two, so that the aforementioned water flow channel can also be formed between the spiral groove 21 and the inner wall of the housing 1.

[0047] As Figures 1 to 4 shown and in the orientation Figure 3 shown, the noise reducer further includes an elastic member, and the elastic member is a spring 3. An installation structure is provided in the second part 14. The installation structure is generally a cylindrical structure, and a through hole serving as a communication structure is provided through both ends thereof. That is to say, the installation structure is set as a cylindrical structure 142 with a diameter smaller than the inner diameter of the second part 14. The cylindrical structure 142 extends in the direction close to the noise reduction member 2, and the end thereof far from the noise reduction member 2 (roughly Figure 3 the left end of the cylindrical structure 142 in Figure 3 is connected to the inner wall of the second part 14. The end of the noise reduction member 2 facing away from the water inlet 11 (roughly Figure 3 the left end of the noise reduction member 2 in Figure 3The noise reduction member 2 extends outwards to restore the original position under the action of the spring 3 to the direction close to the water inlet 11 (roughly Figure 3 In this way, the noise reduction component 2 and the spring 3 work together to automatically adjust the position of the noise reduction component 2 in the housing 1 according to the size of the water flow, thereby adjusting the size of the water flow channel. In this way, even if the water flow entering the housing 1 from the water inlet 11 is a pulsed water flow or the water flow fluctuates greatly, the water flow speed can be effectively slowed down and the noise can be reduced.

[0048] It should be noted that the left end of the noise reduction component 2 may not be provided with the mounting hole 22 , and when the spring 3 is compressed, the second end of the spring 3 may directly abut against the left end of the noise reduction component 2 .

[0049] It should be noted that the connecting structure on the mounting structure may not be set as a through hole, but may be set as a honeycomb structure or other structure that can be connected to the water outlet 12 and the water flow channel respectively. Of course, the mounting structure may not be set as a cylindrical structure 142, but may be set as a columnar structure with a cross-section of a rectangular, square, polygonal, or irregular shape, and a through hole is provided on the columnar structure, and the through hole passes through the columnar structure along the water flow direction. Obviously, the mounting structure may also be set in other forms such as a hook, a buckle, and an annular surface. For example, when the mounting structure is set as a hook, the first end of the spring 3 can be fixed by hooking the first end of the spring 3. For another example, when the mounting structure is an annular surface, screw holes, magnetic adsorption parts, etc. may be set on the annular surface, and a corresponding docking structure may be set at the first end of the spring 3 accordingly, so as to fix the first end of the spring 3. Without departing from the basic principles of the present application, technicians in this field can flexibly choose according to the specific application scenario, as long as the spring 3 can be set on the side of the noise reduction component 2 away from the water inlet 11, can be extended along the axial direction of the outer shell 1, or can be compressed to allow the noise reduction component 2 to be displaced along the axial direction of the outer shell 1.

[0050] It should be noted that the elastic member can also be a spring 3 or other parts made of elastic elastomers such as rubber. Without departing from the basic principles of the present application, those skilled in the art can flexibly select the specific form of the elastic member according to the specific application scenario, as long as it can be compressed along the axial direction of the housing 1 when subjected to external force, and extend along the axial direction of the housing 1 under its own elastic force when the external force is removed. Of course, the noise reducer may not include an elastic member.

[0051] It should be noted that, in this embodiment, the axial direction of the housing 1 is approximately Figure 3 Horizontal direction in .

[0052] like Figure 2 ,Figure 5 , Figure 6 As shown, at the end of the noise reduction member 2 facing away from the water inlet 11, a conical groove 23 is recessed inward from the mounting hole 22. At the end of the noise reduction member 2 facing the water inlet 11, a second groove 24 is recessed inward. The second groove is generally a cylindrical groove, meaning its groove bottom is circular. The settings of the conical groove 23 and the second groove 24 are both for convenient injection molding, ensuring that the wall thickness of each part of the noise reduction member 2 is equivalent. At the same time, it can also reduce the mass of the noise reduction member 2, enabling it to displace axially along the housing 1 with the change of water flow. And, a part of the water flow coming from the water inlet 11 will first enter the second groove 24, so that it can better push the noise reduction member 2 to move towards the direction close to the water outlet 12, thereby better slowing down the water flow speed, reducing the impact sound of the pulsed water flow, and reducing noise. In addition, a cross reinforcing rib 25 is provided in the conical groove 23 to ensure the strength of the noise reduction member 2. Of course, the conical groove 23 and the cylindrical groove 24 may not be provided at both ends of the noise reduction member 2.

[0053] As Figures 1 to 4 shown, the noise reducer further includes a first joint 4 and a second joint 5. The first end of the first joint 4 is provided at the water inlet 11 of the housing 1, and the second end is connected to the outlet of the pulsating booster pump through a water inlet pipeline (not shown). The first end of the second joint 5 is provided at the water outlet 12 of the housing 1, and the second end sends water out through a water outlet pipeline. Both the first joint 4 and the second joint 5 are set as common quick connectors on the market. The first joint 4 and the second joint 5 are directly inserted at the water inlet 11 and the water outlet 12, and then the water inlet pipeline is connected to the second end of the first joint 4 by plugging, and the water outlet pipeline is connected to the second end of the second joint 5 by plugging. In this way, the installation of the noise reducer is realized quickly and conveniently. The water flow coming out of the pulsating booster pump in a pulsed manner is slowed down by the noise reducer and then sent out through the water outlet pipeline, which is convenient for users to use.

[0054] It should be noted that the first joint 4 and the second joint 5 may not be quick connectors, but may be set as ordinary joints. In this case, the first joint 4 and the second joint 5 can be set at the water inlet 11 and the water outlet 12 of the housing 1 by means of screwing, clamping, plugging, etc. Without departing from the basic principle of the present application, those skilled in the art can flexibly select the specific setting forms of the first joint 4 and the second joint 5 according to the specific application scenarios, as long as the noise reducer can be set at the outlet of the pulsating booster pump through the first joint 4 and the second joint 5 and the water flow at the outlet of the noise reducer can be led out.

[0055] It should be noted that the noise reducer may also include only the first connector 4. In this case, the outlet of the noise reducer can be connected to the water outlet pipe through other means such as screwing or clamping. Obviously, the noise reducer may also include only the second connector 5. In this case, the inlet of the noise reducer can be connected to the outlet of the pulsating booster pump through other means such as screwing or clamping. Of course, the noise reducer may also not include the first connector 4 and the second connector 5. In this case, the housing 1 of the noise reducer can be directly connected to the pulsating booster pump and the water outlet pipe respectively through other means such as screwing or clamping.

[0056] In summary, in the preferred technical solution of the present utility model, by arranging the noise reduction member 2 in the housing 1 of the noise reducer and making the diameter of the end of the noise reduction member 2 close to the water inlet 11 smaller than the diameter of the end close to the water outlet 12, after the water flow enters the housing 1 and is blocked by the noise reduction member 2, the water flow velocity decreases and the water flow becomes gentle, so that the noise can be effectively reduced, the formation of pulsating water hammer at the downstream end of the noise reducer can be avoided, and the failure rate of the tabletop water purifier is effectively reduced. By making the diameter of the noise reduction member 2 gradually increase along the water flow direction in the housing 1 and the inner diameter of at least the part of the housing 1 corresponding to the noise reduction member 2 gradually increase along the water flow direction, the noise can be better reduced and the failure rate of the tabletop water purifier can be reduced. By arranging a spiral groove 21 extending along the circumferential direction on the outer wall of the noise reduction member 2, a spiral flow channel can be formed between the spiral groove 21 and the inner wall of the first part 13. Through this spiral flow channel, the water flow can be better dispersed, the water flow velocity can be slowed down, and the noise can be reduced. By arranging a spring 3 on the side of the noise reduction member 2 facing away from the water inlet 11, when the water flow rate is large, the noise reduction member 2 can be pushed to move along the water flow direction and the spring 3 can be compressed, increasing the distance between the noise reduction member 2 and the first part 13, slowing down the water flow while allowing the water flow to pass quickly. When the water flow rate is small, the spring 3 pushes the noise reduction member 2 to return to its original position under its own elastic force, so that the noise can be better reduced.

[0057] In addition, the present utility model also provides a household appliance, which includes a water pump and the noise reducer described in any of the foregoing solutions.

[0058] It should be noted that this household appliance has all the technical effects of the foregoing noise reducer and will not be elaborated herein.

[0059] Of course, the above replaceable embodiments, as well as between the replaceable embodiments and the preferred embodiments, can also be used in cross combination to combine new embodiments to be applicable to more specific application scenarios.

[0060] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present utility model and forms different embodiments. For example, in the claims of the present utility model, any one of the claimed embodiments can be used in any combination.

[0061] So far, the technical solutions of the present utility model have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present utility model.

Claims

1. A noise reducer for a household appliance with a water pump, characterized in that, The noise reducer includes an outer shell and a noise reduction component arranged in the outer shell. The outer shell has a water inlet and a water outlet. Water flows into the outer shell through the water inlet and then flows out of the outer shell through the water outlet. The diameter of the end of the noise reduction component close to the water inlet is smaller than the diameter of the end close to the water outlet. A water flow channel is formed between the noise reduction component and the inner wall of the outer shell.

2. The noise reducer according to claim 1, characterized in that, The diameter of the noise reduction member gradually increases along a water flow direction in the housing.

3. The noise reducer according to claim 2, characterized in that, An inner diameter of at least a portion of the housing corresponding to the noise reduction member gradually increases along the water flow direction.

4. The noise reducer according to claim 2, wherein A first groove is arranged on the outer wall of the noise reduction component, at least a part of the first groove is arranged along the water flow direction in the shell, and the water flow channel is formed between the first groove and the inner wall of the shell.

5. The noise reducer according to claim 4, characterized in that, The first groove is a spiral groove extending along the circumference of the outer wall of the noise reduction member.

6. The noise reducer according to claim 5, characterized in that, The number of the spiral grooves is multiple.

7. The noise reducer according to any one of claims 1 to 6, characterized in that, The noise reducer also includes an elastic component, which is arranged in the shell and located on a side of the noise reduction component away from the water inlet. The elastic component is configured to be able to extend or be compressed along the axial direction of the shell to allow the noise reduction component to be displaced along the axial direction of the shell.

8. The noise reducer according to claim 7, characterized in that, A mounting structure is provided in the housing near the water outlet, the first end of the elastic member is connected to the mounting structure, and a connecting structure is provided on the mounting structure, through which the area where the elastic member is located can be connected with the water outlet and the water flow channel, and when the elastic member is compressed, the second end of the elastic member abuts against the end of the noise reduction member away from the water inlet.

9. The noise reducer according to claim 7, characterized in that, The end of the noise reduction component facing the water inlet is recessed inwardly to form a second groove.

10. A household appliance, characterized in that, The household appliance comprises a water pump and the noise reducer according to any one of claims 1 to 9.

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