A noise reduction device and a water purifier

Abstract

This utility model discloses a noise reduction device and a water purifier. The noise reduction device includes: a noise sensor, at least two silencing cavities, and adjacent silencing cavities connected by a solenoid valve. The noise sensor is used to collect a first noise value generated by the water purifier during the water purification process and determine a noise deviation value between the first noise value and a target noise value. The solenoid valve is used to receive the on / off status of each solenoid valve matched with the noise deviation value and to operate based on the on / off status to achieve the opening of the silencing cavity to be opened. The silencing cavity opened during the water purification process is filled with water to absorb the noise generated by the booster pump. This utility model solves the problem of high noise levels in water purifiers during the water purification process, breaks through the bottleneck of traditional passive noise reduction modes, and can achieve continuous and effective noise reduction during the water purification process, improving the user experience.

Description

Technical Field

[0001] This utility model relates to the field of intelligent kitchen appliance technology, and in particular to a noise reduction device and a water purifier. Background Technology

[0002] In recent years, with the continuous improvement of science and technology and economic level, people's requirements for drinking water have also become increasingly higher. Traditional tap water may be affected by factors such as aging pipes and secondary water supply pollution during the transportation process, making it difficult to fully meet the needs of healthy drinking water. Against this backdrop, water purification equipment has gradually become a standard product in homes, commercial venues, and even some industrial settings. Among them, reverse osmosis membrane (RO membrane) water purifiers have gained widespread application and favor due to their ability to effectively remove pollutants such as heavy metals, bacteria, viruses, organic matter, and dissolved solids from water, producing water quality close to pure water. In particular, high-flow RO membrane water purifiers, with their advantages of not requiring a water storage pressure tank, providing instant filtration and drinking water, and fast water output, have become the mainstream development direction in the market.

[0003] However, in practical applications, high-flow RO membrane water purifiers have significant technical challenges during operation. Because their working principle relies on a high-pressure pump to pressurize raw water and pass it through the RO membrane for efficient separation, this process is typically accompanied by high water pressure fluctuations and hydrodynamic noise. Especially during stages such as water inlet, pressurization, concentrate discharge, and high-pressure pump start-up and shutdown, water flow impact, pipe vibration, cavitation effects, and resonance phenomena can easily occur in the water system, resulting in noticeable operating noise. Currently, common noise reduction methods in the industry mainly include: using silent pumps, adding vibration damping pads, optimizing pipe layout, and using sound-insulating materials to wrap water system components. These methods are all passive noise reduction methods with significant limitations—their noise reduction effect is fixed and cannot be dynamically adjusted according to actual operating conditions, making it difficult to achieve continuous and effective noise suppression.

[0004] How to break through the bottleneck of traditional passive noise reduction mode, achieve continuous and effective noise reduction in the water purification process, and improve the user experience is a key research issue in the industry. Utility Model Content

[0005] This invention provides a noise reduction device and a water purifier that breaks through the bottleneck of traditional passive noise reduction mode, and can achieve continuous and effective noise reduction during the water purification process, thereby improving the user experience.

[0006] According to one aspect of the present invention, a noise reduction device is provided for use in a water purifier. The noise reduction device includes: a noise sensor, at least two silencing cavities, and adjacent silencing cavities connected by a solenoid valve.

[0007] The noise sensor is used to collect the first noise value generated by the water purifier during the water purification process and to determine the noise deviation value between the first noise value and the target noise value.

[0008] The solenoid valve is used to receive the on / off status of each solenoid valve that matches the noise deviation value, and to operate based on the on / off status to realize the conduction of the silencing cavity to be conducted.

[0009] The sound-absorbing cavity, which is open during the water purification process of the water purifier, is filled with water to absorb the noise generated by the booster pump.

[0010] In an optional implementation of this embodiment, the non-conductive silencing cavity during the water purification process of the water purifier is called a cavity.

[0011] In an optional implementation of this embodiment, the silencing cavity includes a first silencing cavity, a second silencing cavity, and a third silencing cavity; the solenoid valve includes a first solenoid valve and a second solenoid valve;

[0012] One end of the first silencing cavity is connected to the water circuit of the water purifier, and the other end is connected to the first solenoid valve; one end of the water circuit is connected to the booster pump, and the other end is connected to the RO membrane filter.

[0013] One end of the second silencing cavity is connected to the first solenoid valve, and the other end is connected to the second solenoid valve;

[0014] One end of the third silencing cavity is connected to the second solenoid valve.

[0015] In an optional implementation of this embodiment, the first silencing cavity, the second silencing cavity, and the third silencing cavity are cuboids, and the volumes of the first silencing cavity, the second silencing cavity, and the third silencing cavity are fixed.

[0016] In an optional implementation of this embodiment, the noise reduction device further includes a controller; the controller is communicatively connected to the noise sensor, the first solenoid valve, and the second solenoid valve, respectively.

[0017] The controller is configured to receive the noise deviation value and determine the target number of silencing cavities to be activated based on the noise deviation value.

[0018] In an optional implementation of this embodiment, the controller is further configured to:

[0019] Based on the number of targets, the on / off status of the first solenoid valve and the second solenoid valve are determined respectively, and each on / off status is sent to the first solenoid valve and the second solenoid valve respectively.

[0020] According to another aspect of the present invention, a water purifier is provided, including a noise reduction device according to any embodiment of the present invention.

[0021] In an optional implementation of this embodiment, the water purifier further includes a booster pump, which is communicatively connected to the controller.

[0022] In an optional implementation of this embodiment, the water purifier further includes a pressure sensor and a flow sensor; the pressure sensor and the flow sensor are respectively communicatively connected to the controller.

[0023] The pressure sensor is used to detect the water pressure and transmit the detected pressure value to the controller;

[0024] The flow sensor is used to detect the water flow and transmit the detected flow value to the controller.

[0025] In an optional implementation of this embodiment, the controller is further configured to:

[0026] If the pressure value is determined to be greater than the target pressure value and the flow rate value is less than the target flow rate value, the booster pump motor is driven to increase its speed by frequency conversion until the received flow rate value is greater than the target flow rate value.

[0027] The technical solution of this utility model includes a noise reduction device comprising: a noise sensor, at least two silencing cavities, and a connection between two adjacent silencing cavities via an electromagnetic valve. The noise sensor is used to collect a first noise value generated by the water purifier during the water purification process and determine a noise deviation value between the first noise value and a target noise value. The electromagnetic valve is used to receive the on / off status of each electromagnetic valve matched with the noise deviation value and to operate based on the on / off status to achieve the opening of the silencing cavity to be opened. The silencing cavity opened during the water purification process is filled with water to absorb the noise generated by the booster pump, solving the problem of high noise levels in the water purifier during the purification process. This breaks through the bottleneck of traditional passive noise reduction modes, enabling continuous and effective noise reduction during the water purification process and improving the user experience.

[0028] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a structural schematic diagram of a noise reduction device according to Embodiment 1 of this utility model;

[0031] Figure 2 This is a structural schematic diagram of a noise reduction device according to Embodiment 2 of this utility model;

[0032] Figure 3 This is a structural schematic diagram of a water purifier equipped with a noise reduction device according to Embodiment 3 of this utility model.

[0033] icon:

[0034] 100-Noise reduction device; 110-Noise sensor; 121-First silencing cavity; 122-Second silencing cavity; 123-Third silencing cavity; 131-First solenoid valve; 132-Second solenoid valve; 150-Water circuit; 160-Boost pump; 170-RO membrane filter element; 210-Controller; 300-Water purifier; 301-Raw water inlet; 302-Pretreatment filter element; 303-Inlet valve; 310-Pressure sensor; 320-Flow sensor; 3011-Wastewater valve; 3012-One-way high-pressure switch; 3014-Pure water faucet. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] Example 1

[0039] Figure 1 This is a structural schematic diagram of a noise reduction device according to Embodiment 1 of the present invention. This embodiment is applicable to situations where noise is reduced during the water purification process of a water purifier using a noise reduction device. The noise reduction device 100 involved in this embodiment can be applied to a water purifier, that is, the noise reduction device 100 involved in this embodiment can be installed inside the water purifier.

[0040] Optional, see reference Figure 1 The noise reduction device 100 includes: a noise sensor 110, at least two silencing cavities, and adjacent silencing cavities connected by a solenoid valve. It is understood that in this embodiment, the noise sensor 110 can be a microphone or other sound acquisition module, and this embodiment does not limit it.

[0041] In this embodiment, the noise sensor 110 is used to collect the first noise value generated by the water purifier during the water purification process and determine the noise deviation value between the first noise value and the target noise value.

[0042] The solenoid valve is used to receive the on / off status of each solenoid valve that matches the noise deviation value, and to operate based on the on / off status to realize the conduction of the silencing cavity to be conducted.

[0043] The sound-absorbing cavity, which is open during the water purification process of the water purifier, is filled with water to absorb the noise generated by the booster pump.

[0044] Optionally, in this embodiment, the noise sensor 110 can be used to collect the sound generated by the booster pump when the water purifier is working, i.e., during water purification. In an optional implementation of this embodiment, the noise sensor 110 can be turned on when the water purifier starts working, and the noise value of the water purifier can be obtained in real time through the noise sensor 110. Alternatively, the noise value of the water purifier can be obtained once at a set time interval (e.g., 10 seconds, 30 seconds, or 1 minute). For ease of description, the obtained noise value is referred to as the first noise value in this embodiment. It can also be named other noise values, such as the current noise value or the reference noise value, which is not a limitation of this embodiment.

[0045] Furthermore, the noise deviation between the first noise value and the target noise value can be determined; wherein, the target noise value can be 53dB, 52dB or 50dB, etc., and is not limited thereto in this embodiment; it should be noted that the specific value of the target noise value can be determined based on the manufacturing standards of the water purifier.

[0046] Optionally, in this embodiment, after obtaining the first noise value, if it is determined that the first noise value is greater than the target noise value, that is, if it is determined that the noise of the current water purifier is large and has exceeded the preset maximum noise value (target noise value), the difference between the first noise value and the target noise value can be further determined. That is, the first noise deviation value can be obtained by subtracting the target noise value from the first noise value.

[0047] For example, in one example of this embodiment, if the first noise value is 60dB and the target noise value is 53dB, then the first noise deviation value is 60dB-53dB=7dB.

[0048] Optionally, in this embodiment, the silencing cavity includes a first silencing cavity 121, a second silencing cavity 122, and a third silencing cavity 123; the solenoid valve includes a first solenoid valve 131 and a second solenoid valve 132; one end of the first silencing cavity 121 is connected to the water circuit 150 of the water purifier, and the other end is connected to the first solenoid valve 131; one end of the water circuit 150 is connected to a booster pump 160, and the other end is connected to an RO membrane filter element 170; one end of the second silencing cavity 122 is connected to the first solenoid valve 131, and the other end is connected to the second solenoid valve 132; one end of the third silencing cavity 123 is connected to the second solenoid valve 132.

[0049] It should be noted that this embodiment and Figure 1 The description uses only three silencing cavities and two solenoid valves as an example and is not intended to limit the scope of this embodiment. In this embodiment, the number of silencing cavities can also be four, five, or six, and correspondingly, the number of solenoid valves can be three, four, or five, that is, the number of solenoid valves is one less than the number of silencing cavities.

[0050] Optionally, in this embodiment, the solenoid valve can receive the on / off status of each solenoid valve that matches the current noise deviation value. For example, the first solenoid valve 131 can receive the on / off status of the first solenoid valve 131, for example, "0" indicates on; the second solenoid valve 132 can receive the on / off status of the second solenoid valve 132, for example, "0" indicates on and "1" indicates off. For example, in the above example, if the first solenoid valve 131 is on and the second solenoid valve 132 is off, then the silencing cavities to be connected are the first silencing cavity 121 and the second silencing cavity 122. After the first solenoid valve 131 is turned on and the second solenoid valve 132 is turned off, the first silencing cavity 121 and the second silencing cavity 122 can be connected. At this time, the first silencing cavity 121 and the second silencing cavity 122 are filled with water.

[0051] Optionally, in this embodiment, the noise-absorbing cavities (e.g., the first noise-absorbing cavity 121 and the second noise-absorbing cavity 122 in the above example) that are opened during the water purification process of the water purifier are filled with water to absorb the noise generated by the booster pump.

[0052] It is understandable that the water stored in the silencing cavity can effectively absorb the noise generated by the booster pump. This is because when sound waves pass through a medium like water, their energy is gradually absorbed by various factors and converted into other forms of energy (such as heat energy).

[0053] Optionally, in this embodiment, the silencing cavity that is not open during the water purification process of the water purifier is an empty cavity. For example, in the above example, the third silencing cavity 123 is an empty cavity, which does not participate in the noise reduction operation of the water purifier.

[0054] Optionally, in this embodiment, the first silencing cavity 121 is connected to the water circuit 150 of the water purifier, and one end of the water circuit 150 is connected to the booster pump 160 and the other end is connected to the RO membrane filter element 170.

[0055] The advantage of this design is that it minimizes the distance between each silencing cavity and the booster pump 160, ensuring that the silencing cavity absorbs the noise generated by the booster pump 160 most effectively.

[0056] Optionally, in this embodiment, each silencing cavity is sealed and is an empty cavity before the water purification process of the water purifier begins.

[0057] In an optional implementation of this embodiment, the silencing cavity 120 is a sealed cavity that does not contain any liquid before the water purifier starts working; this can significantly improve the noise reduction effect of the silencing cavity.

[0058] Optionally, in this embodiment, the first silencing cavity 121, the second silencing cavity 122, and the third silencing cavity 123 are cuboids, and the volumes of the first silencing cavity 121, the second silencing cavity 122, and the third silencing cavity 123 are fixed.

[0059] It should also be noted that in this embodiment, the volumes of each silencing cavity may be equal or unequal. That is, the volumes of the first silencing cavity 121, the second silencing cavity 122, and the third silencing cavity 123 may be the same or different. This embodiment does not limit them.

[0060] The technical solution of this embodiment includes a noise reduction device that can include: a noise sensor, at least two silencing cavities, and a connection between two adjacent silencing cavities via a solenoid valve. The noise sensor is used to collect a first noise value generated by the water purifier during the water purification process and determine a noise deviation value between the first noise value and a target noise value. The solenoid valve is used to receive the on / off status of each solenoid valve matched with the noise deviation value and to operate based on the on / off status to achieve the opening of the silencing cavity to be opened. The silencing cavity opened during the water purification process of the water purifier is filled with water to absorb the noise generated by the booster pump, solving the problem of high noise during the water purification process of the water purifier, breaking through the bottleneck of the traditional passive noise reduction mode, and achieving continuous and effective noise reduction during the water purification process, thus improving the user experience.

[0061] Example 2

[0062] Figure 2 This is a structural schematic diagram of a noise reduction device according to Embodiment 2 of this utility model. This embodiment is a further refinement of the above-mentioned technical solutions. Figure 2 As shown, the noise reduction device further includes: a controller 210; the controller 210 is communicatively connected to the noise sensor 110, the first solenoid valve 131 and the second solenoid valve 132 respectively;

[0063] The controller 210 is used to receive the noise deviation value and determine the target number of silencing cavities to be activated based on the noise deviation value.

[0064] Optionally, in this embodiment, the controller 210 can accept the noise deviation value between the first noise value transmitted by the noise sensor 110 and the target noise value, and determine whether the noise deviation value is greater than a preset noise deviation value, that is, determine whether the current noise value is unacceptable to the user. Further, the controller can determine the target number of silencing cavities to be activated based on the noise deviation value.

[0065] In one optional implementation of this embodiment, after receiving the noise deviation value between the first noise value and the target noise value, the controller 210 inputs the noise deviation value into the relationship curve between the noise deviation value and the total volume for solving to obtain the total volume of the silencing cavity to be connected; or, the first noise deviation value is input into the target machine learning model for iterative calculation to obtain the total volume of the silencing cavity to be connected.

[0066] Furthermore, the cavity volume of each of the silencing cavities can be determined separately, and it can be determined whether the cavity volumes of each of the silencing cavities are equal; if it is determined that the cavity volumes of each of the silencing cavities are equal, the target number can be determined based on the total volume and the cavity volume.

[0067] In an optional implementation of this embodiment, after determining the total volume of the silencing cavities, i.e., after determining the required total volume of the silencing cavities to effectively suppress the current noise, the cavity volume of each silencing cavity in the water purifier can be determined, and it can be determined whether the cavity volumes of each silencing cavity are equal. If it is determined that the cavity volumes of each silencing cavity are equal, then the target number can be obtained directly by dividing the total volume by the cavity volume. For example, in this embodiment, the total volume is 30 cm³. 3 The volume of each silencing cavity is 10 cm³. 3 Therefore, the number of targets is 30 / 10=3.

[0068] In another optional implementation of this embodiment, when it is determined that the cavity volumes of each of the silencing cavities are not equal, the total volume is subtracted from the first cavity volume of the first silencing air conditioner and the second cavity volume of the second silencing cavity until the result is less than or equal to 0; wherein, the first silencing cavity is connected to the water circuit, and the second silencing cavity is connected to the first silencing cavity through a solenoid valve.

[0069] For example, in this embodiment, the total volume is 30cm². 3 The volume of the first silencing cavity is 10 cm³. 3 The volume of the second silencing cavity is 25 cm³. 3 Then the first solenoid valve can be turned on, that is, the target number is 2. Specifically, the first silencing cavity and the second silencing cavity can be determined as the silencing cavities to be turned on.

[0070] In another optional implementation of this embodiment, it is not necessary to determine the total volume of the silencing cavities to be connected. Instead, the relationship between the noise deviation value and the number of silencing cavities to be connected can be predetermined. For example, a correspondence between the noise deviation value and the number of silencing cavities to be connected can be established. For instance, if the noise deviation value is 0-5dB, then the number of silencing cavities to be connected is 1; if the noise deviation value is 5-8dB, then the number of silencing cavities to be connected is 2; and if the noise deviation value is 8-10dB, then the number of silencing cavities to be connected is 3. The advantage of this setting is that the number of silencing cavities to be connected can be directly determined based on the noise deviation value, which can further improve the noise reduction efficiency of the water purifier.

[0071] Optionally, in this embodiment, the controller 210 can also be used to determine the on / off status of the first solenoid valve 131 and the second solenoid valve 132 based on the target number, and send each of the on / off statuses to the first solenoid valve 131 and the second solenoid valve 132 respectively.

[0072] For example, if the number of targets is 1, then the first solenoid valve 131 is off and the second solenoid valve 132 is also off; if the number of targets is 2, then the first solenoid valve 131 is on and the second solenoid valve 132 is off; if the number of targets is 3, then the first solenoid valve 131 is on and the second solenoid valve 132 is also on.

[0073] The noise reduction device involved in this embodiment may include a controller; the controller is communicatively connected to the noise sensor, the first solenoid valve, and the second solenoid valve respectively; the controller is used to receive the noise deviation value and determine the target number of silencing cavities to be activated based on the noise deviation value; determine the on / off status of the first solenoid valve and the second solenoid valve based on the target number, and send each on / off status to the first solenoid valve and the second solenoid valve respectively, so as to provide a basis for ensuring the accuracy of the noise reduction device.

[0074] Example 3

[0075] Figure 3 This is a structural schematic diagram of a water purifier equipped with a noise reduction device according to Embodiment 3 of this utility model. The water purifier includes the noise reduction devices described in the above embodiments. Figure 3 As shown, the water purifier 300 may include the noise reduction device involved in the above embodiments.

[0076] Optionally, the water purifier may also include a booster pump 160, which is communicatively connected to the controller 210.

[0077] Optionally, in this embodiment, the water purifier 300 further includes: a pressure sensor 310 and a flow sensor 320; the pressure sensor 310 and the flow sensor 320 are respectively communicatively connected to the controller 210; the pressure sensor 310 is used to detect the water pressure and transmit the detected pressure value to the controller 210; the flow sensor 320 is used to detect the water flow and transmit the detected flow value to the controller 210.

[0078] Optionally, in this embodiment, the water purification process of the water purifier 300 can be as follows: when the pure water faucet 3014 is opened, the one-way high-pressure switch 3012 is turned on due to the pressure drop, and the system starts the water purification process; raw water enters through the raw water inlet 301, is coarsely filtered by the pretreatment filter element 302, and is pressurized by the booster pump 160 before entering the water circuit 150. A portion of the water enters the first silencer cavity 121 (the other two cavities are not opened). After pressurization, the water continues to be filtered by the RO membrane filter element 170. Pure water is discharged through the flow sensor 320 and the pure water faucet 3014, and wastewater is discharged through the wastewater valve 3011. During water purification, the inlet valve 303 is opened and the booster pump 160 is working. When the pure water faucet 3014 is closed, the one-way high-pressure switch 3012 is turned off due to the increase in pipeline pressure, and the system stops water purification. At this time, the inlet valve 303 is closed and the booster pump 160 stops working.

[0079] Optionally, in this embodiment, the controller 210 can also be used to drive the booster pump motor to increase its speed by frequency conversion when it is determined that the pressure value is greater than the target pressure value and the flow value is less than the target flow value, until the received flow value is greater than the target flow value.

[0080] The target pressure value can be 95 PSI and the target flow rate value can be 2 LPM. In this embodiment, these values ​​are not limited.

[0081] Optionally, in this embodiment, during the water purification process, the controller 210 of the water purifier can receive the flow rate value detected by the flow sensor and the pressure value detected by the pressure sensor in real time. If it is determined that the pressure value is greater than the target pressure value and the flow rate value is less than the target flow rate value, a pressure deviation value can be further determined based on the difference between the pressure value and the target pressure value, and a flow deviation value can be determined based on the difference between the flow rate value and the target flow rate value. Furthermore, the booster pump motor can be driven to increase its speed based on the pressure deviation value and the flow deviation value. If it is determined that the flow rate value is greater than or equal to the target flow rate value, the booster pump motor is stopped from being driven to increase its speed.

[0082] In an optional implementation of this embodiment, when the controller 210 detects that the pressure is greater than 95 PSI and the flow rate is less than 2.0 LPM, there is a deviation from the design. The controller 210 drives the booster pump motor to increase the speed (1200 < speed < 1600) based on the deviation signal. When the flow rate is detected to be greater than or equal to 2.0 LPM, the controller 210 releases the drive of the motor frequency converter, maintains the current state and tends to stabilize. This can ensure that the output flow rate meets the design requirements.

[0083] In this embodiment, the solution allows for the opening of different numbers of noise-absorbing cavities based on varying noise levels during the use of the water purifier, thereby stabilizing the noise at its lowest possible level and enhancing the user experience.

[0084] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for the purpose of clarifying the device. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0085] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A noise reduction device, applied to a water purifier, characterized in that, The noise reduction device (100) includes: a noise sensor (110), at least two silencing cavities, and adjacent silencing cavities connected by a solenoid valve; The noise sensor (110) is used to collect the first noise value generated by the water purifier during the water purification process and determine the noise deviation value between the first noise value and the target noise value. The solenoid valve is used to receive the on / off status of each solenoid valve that matches the noise deviation value, and to operate based on the on / off status to realize the conduction of the silencing cavity to be conducted. The sound-absorbing cavity, which is open during the water purification process of the water purifier, is filled with water to absorb the noise generated by the booster pump.

2. The noise reducing device of claim 1, wherein, The non-conductive silencer cavity during the water purification process of the water purifier is called a cavity.

3. The noise reducing device of claim 1, wherein, The silencing cavity includes a first silencing cavity (121), a second silencing cavity (122), and a third silencing cavity (123); the solenoid valve includes a first solenoid valve (131) and a second solenoid valve (132). One end of the first silencing cavity (121) is connected to the water circuit (150) of the water purifier, and the other end is connected to the first solenoid valve (131); one end of the water circuit (150) is connected to the booster pump (160), and the other end is connected to the reverse osmosis (RO) membrane filter (170). One end of the second silencing cavity (122) is connected to the first solenoid valve (131), and the other end is connected to the second solenoid valve (132); One end of the third silencing cavity (123) is connected to the second solenoid valve (132).

4. The noise reducing device of claim 3, wherein, The first silencing cavity (121), the second silencing cavity (122), and the third silencing cavity (123) are cuboids, and the volumes of the first silencing cavity (121), the second silencing cavity (122), and the third silencing cavity (123) are fixed.

5. The noise reducing device of claim 4, wherein, The noise reduction device further includes a controller (210); the controller (210) is communicatively connected to the noise sensor (110), the first solenoid valve (131) and the second solenoid valve (132), respectively; The controller (210) is used to receive the noise deviation value and determine the target number of silencing cavities to be activated based on the noise deviation value.

6. The noise reduction device according to claim 5, characterized in that, The controller (210) is also used for: Based on the number of targets, the on / off status of the first solenoid valve (131) and the second solenoid valve (132) are determined respectively, and each on / off status is sent to the first solenoid valve (131) and the second solenoid valve (132) respectively.

7. A water purifier, characterized in that, Includes the noise reduction device as described in any one of claims 1-6.

8. The water purifier according to claim 7, characterized in that, The water purifier also includes a booster pump, which is communicatively connected to the controller (210).

9. The water purifier according to claim 8, characterized in that, The water purifier also includes a pressure sensor (310) and a flow sensor (320); the pressure sensor (310) and the flow sensor (320) are respectively connected to the controller (210) in communication. The pressure sensor (310) is used to detect the water pressure and transmit the detected pressure value to the controller (210). The flow sensor (320) is used to detect the water flow and transmit the detected flow value to the controller (210).

10. The water purifier according to claim 9, characterized in that, The controller (210) is also used for: If the pressure value is greater than the target pressure value and the flow rate is less than the target flow rate, the booster pump (160) motor is driven to increase the speed until the received flow rate is greater than the target flow rate.

Images