Noise reduction device, disinfection system and dish washing machine

Abstract

The utility model relates to a noise reduction device, a disinfection system and a dish washing machine. The noise reduction device comprises a first silencer. The first silencer is used for being communicated with the air pump and provided with a first silencing cavity, a first air inlet and a first air outlet which are communicated with the first silencing cavity, and the included angle between the direction, away from the first silencing cavity, of the first air inlet and the direction, away from the first silencing cavity, of the first air outlet is smaller than 90 degrees. According to the noise reduction device, the first silencer is communicated with the air pump, noise generated by the air pump is reduced in the transmission process of the noise, and the operation noise of a disinfection system in the dish washing machine can be effectively reduced. In addition, the included angle between the pipelines connected with the first silencer is small, the pipelines can be arranged on the same side, the space occupancy rate of installation of the noise reduction device is reduced, the noise reduction device can be suitable for equipment with small internal space such as a dish washing machine, and pipeline arrangement is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a noise reduction device, a disinfection system and a dishwasher. Background Art

[0002] The dishwasher contains a disinfection system, which is mainly used to prepare disinfectant and use it for disinfection and cleaning. The disinfectant water generator produces ozone by electrolyzing air, and then the air pump pumps the ozone gas into the water tank to mix it with water to prepare the disinfectant. Since the gas introduced by the air pump cannot be dissolved in the water all at once, in order to prevent the ozone gas from diffusing into the atmosphere and causing air pollution, the gas in the dishwasher disinfection system needs to be in a closed internal circulation gas circuit at all times, that is, after the gas is discharged from the water tank, it will eventually return to the air pump.

[0003] However, since the noise from the air pump itself is relatively loud, and the gas generates relatively loud noise in the complex internal circulation gas circuit, the dishwasher will generate relatively loud operating noise when working. Utility Model Content

[0004] Based on this, it is necessary to provide a noise reduction device, a disinfection system and a dishwasher that can reduce the operating noise of the dishwasher to address the above-mentioned problems.

[0005] A noise reduction device, comprising:

[0006] The first muffler is used to connect to the air pump. The first muffler has a first muffler chamber, and has a first air inlet and a first air outlet connected to the first muffler chamber. The angle between the direction of the first air inlet away from the first muffler chamber and the direction of the first air outlet away from the first muffler chamber is less than 90 degrees.

[0007] In one embodiment, the noise reduction device also includes a first air inlet pipe and a first air outlet pipe, the first air inlet pipe is connected to the first muffler chamber via the first air inlet port, the first air outlet pipe is connected to the first muffler chamber via the first air outlet port, and at least one end of the first air inlet pipe and the first air outlet pipe is located in the first muffler chamber.

[0008] In one embodiment, the first muffler includes a first body and a spoiler baffle, the first muffler cavity is formed in the first body, and the spoiler baffle is disposed in the first muffler cavity.

[0009] In one embodiment, the first muffler includes a first body and a first air guide pipe, and the first muffler cavity is formed in the first body;

[0010] The first air duct is passed through the first main body and includes a first noise reduction section located in the first muffler cavity; the first noise reduction section is connected to the first air inlet and the first air outlet, and has a first noise reduction hole connected to the first muffler cavity on its wall.

[0011] In one embodiment, the first muffler has a plurality of structural surfaces, and the first air inlet and the first air outlet are opened on the same structural surface.

[0012] In one embodiment, the noise reduction device also includes a second muffler, the second muffler has a second muffler chamber, one of the first muffler and the second muffler is used to connect to the air intake port of the air pump, and the other is used to connect to the air exhaust port of the air pump.

[0013] In one embodiment, the second muffler is used to connect to the air intake port of the air pump, and the second muffler also has a second air inlet and a second air outlet connected to the second muffler chamber, and the second air inlet and the second air outlet are respectively located at opposite ends of the second muffler in the direction of gravity.

[0014] In one embodiment, the second muffler includes a second body and a second air duct, the second body forms a second muffler cavity, and the second muffler further has a second air inlet and a second air outlet communicated with the second muffler cavity;

[0015] The second air duct is passed through the second main body and includes a second noise reduction section located in the second muffler cavity; the second noise reduction section is connected to the second air inlet and the second air outlet, and has a second noise reduction hole connected to the second muffler cavity on its wall.

[0016] In one of the embodiments, the opening rate of the second noise reduction holes on the tube wall of the second noise reduction section is not less than 30%.

[0017] A disinfection system comprises the above-mentioned noise reduction device.

[0018] A dishwasher comprises the above-mentioned noise reduction device or the above-mentioned disinfection system.

[0019] The noise reduction device, disinfection system and dishwasher described above, wherein the first muffler is connected to the air pump and reduces the noise generated by the air pump during its propagation, can effectively reduce the operating noise of the disinfection system in the dishwasher. In addition, the angle between the pipes connected to the first muffler is small, and the same-side arrangement can be achieved, which reduces the space occupancy rate of the noise reduction device installation, making it suitable for equipment with a small internal space such as a dishwasher, and facilitates the arrangement of pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 Schematic diagram of the structure of a disinfection system of a dishwasher in one embodiment of the present application.

[0022] Figure 2 for Figure 1 A schematic structural diagram of the disinfection system from another angle is shown.

[0023] Figure 3 for Figure 1 The schematic diagram of the structure of the first muffler in the disinfection system is shown.

[0024] Figure 4 for Figure 3 Another angle structural schematic diagram of the first muffler is shown.

[0025] Figure 5 This is a schematic diagram of the structure of the straight-in and straight-out type muffler in Scheme 1.

[0026] Figure 6 This is a schematic diagram of the structure of the first muffler in Scheme 2.

[0027] Figure 7 This is a schematic diagram of the structure of the first muffler in Scheme 3.

[0028] Figure 8 This is a comparison chart of sound transmission loss at different frequencies in Scheme 1, Scheme 2, Scheme 3 and Scheme 4.

[0029] Fig. 9 This is a comparison chart of the total pressure difference at the air inlet and outlet of Scheme 1, Scheme 2, Scheme 3 and Scheme 4.

[0030] Fig.10 Schematic diagram of the flow field simulation inside the muffler in Scheme 3.

[0031] Fig.11 Schematic diagram of the flow field simulation inside the muffler in Scheme 4.

[0032] Fig.12 for Figure 1 The schematic diagram of the structure of the second muffler in the disinfection system is shown.

[0033] Explanation of the reference numerals: 100, disinfection system; 101, disinfection water generating device; 103, water tank; 105, air pump; 107, controller; 109, condensation device; 111, condensation air inlet pipe; 113, condensation drain pipe; 115, cooling fan; 117, installation plane; 210, first muffler; 211, first muffler chamber; 213, first main body; 215, spoiler baffle; 220, first air inlet pipe; 230, first air outlet pipe; 240, second muffler; 241, second muffler chamber; 243, second main body; 245, second air duct; 2451, second noise reduction section; 24511, second noise reduction hole; 2452, second air inlet section; 2453, second air outlet section; 300, straight-in and straight-out type muffler. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0036] In addition, if the term "and / or" appears, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. If the terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0038] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0040] See also Figure 1 and Figure 2It can be understood that the dishwasher provided in an embodiment of the present application also includes a conventional dishwashing sink, a bowl basket, a spray arm, a disinfection system 100, etc. in order to realize its normal functions, which will not be repeated here.

[0041] The disinfection system 100 is used to prepare disinfectant water, which includes a disinfectant water generating device 101, a water tank 103, an air pump 105 and a controller 107. The disinfectant water generating device 101 generates ozone by electrolyzing air, and then the air pump 105 pumps the ozone gas into the water tank 103. The gas discharged from the water tank 103 will return to the air pump 105, and repeat the above operation again to pump it into the water tank 103.

[0042] Since the gas discharged from the water tank 103 is high-temperature and high-humidity gas, it will affect the discharge stability of the disinfection water generating device 101. In order to reduce the temperature and humidity of the gas, the disinfection system 100 also includes a condensing device 109, a condensing air inlet pipe 111 and a condensing air outlet pipe (i.e., the second air inlet section 2452 described below). After the gas is discharged from the water tank 103, it flows into the condensing device 109 through the condensing air inlet pipe 111 for cooling treatment, and then flows to the air pump 105 through the condensing air outlet pipe. In addition, the disinfection system 100 may also include a condensing drain pipe 113, a cooling fan 115 and an installation plane 117. Among them, the condensing drain pipe 113 connects the bottom of the condensing device 109 with the water tank 103, and the condensed water generated by the condensation of the gas in the condensing device 109 will be discharged into the water tank 103 through the condensing drain pipe 113 for reuse. The cooling fan 115 is used to accelerate the condensation speed, and the condensing device 109 can be installed on the installation plane 117. In general, the internal circulation gas circuit of the dishwasher disinfection system 100 is roughly as follows: air pump 105 - disinfection water generating device 101 - water tank 103 - condensing device 109 - air pump 105 .

[0043] Among them, the air pump 105 is the main sound source of the main disinfection system 100, and its single noise is relatively large. Secondly, the internal circulation gas path includes the condensing device 109 with a relatively narrow cavity cross-sectional area and the water tank 103. When the gas propagates inside, it generates relatively large pneumatic noise and vibration noise. In addition, due to the limited internal space of the dishwasher, it is also difficult to reduce its noise.

[0044] To solve the above problems, the dishwasher further includes a noise reduction device, which is used to reduce the operating noise of the dishwasher. Specifically, the noise reduction device is used to reduce the operating noise of the disinfection system 100.

[0045] Please also read Figure 3 and Figure 4One embodiment of the present application further provides the above-mentioned noise reduction device, including a first muffler 210. The first muffler 210 is used to connect to the air pump 105, and the first muffler 210 has a first muffler cavity 211, and has a first air inlet and a first air outlet connected to the first muffler cavity 211, and the angle between the direction of the first air inlet away from the first muffler cavity 211 and the direction of the first air outlet away from the first muffler cavity 211 is less than 90 degrees.

[0046] It is understandable that the noise generated by the operation of the air pump 105 will be transmitted with its exhaust or intake, and may be amplified after entering the water tank 103 or the condensing device 109. The cross-sectional area of ​​the first muffler 210 is relatively large, and specifically, the cross-sectional area of ​​the first muffler cavity 211 therein is relatively large, playing the role of a reactive muffler. The reactive muffler muffles noise by controlling the size of the acoustic impedance, and utilizes the acoustic impedance change such as the cross-sectional mutation in the pipeline to generate reflection, interference, etc., so as to achieve the purpose of noise reduction.

[0047] The first muffler 210 is connected to the air pump 105, and specifically can be connected to the exhaust port of the air pump 105 through the first air outlet or connected to the air intake port of the air pump 105 through the first air inlet. If the first muffler 210 is connected to the exhaust port of the air pump 105, it is located between the air pump 105 and the disinfectant water generating device 101 in the internal circulation gas path of the disinfection system 100, and the gas discharged by the air pump 105 enters the disinfectant water generating device 101 after noise reduction, and is further pumped into the water tank 103; if the first muffler 210 is connected to the air intake port of the air pump 105, it is located between the condensing device 109 and the air pump 105 in the internal circulation gas path of the disinfection system 100, and the gas is inhaled by the air pump 105 after noise reduction. Specifically, the first muffler 210 can be installed on the installation plane 117.

[0048] The first muffler 210 is connected to the internal circulation air circuit of the disinfection system 100 through a pipeline, that is, the air pump 105, the disinfectant water generating device 101, and the condensing device 109 are connected through a pipeline. The pipeline is connected and communicated with the first air inlet and the first air outlet of the first muffler 210, and the connection direction with the first muffler 210 is the direction of the first air inlet and the first air outlet.

[0049] Among them, the first air inlet and the second air inlet can both be openings matching the pipeline, the direction of the first air inlet away from the first silencer chamber 211 is the direction away from the first silencer chamber 211 along its hole axis, and the direction of the first air outlet away from the first silencer chamber 211 is the direction away from the first silencer chamber 211 along its hole axis.

[0050] Since the angle between the direction of the first air inlet away from the first muffler chamber 211 and the direction of the first air outlet away from the first muffler chamber 211 is less than 90 degrees, the angle between the pipeline connected to the first air outlet and the pipeline connected to the second air outlet is less than 90 degrees, which facilitates the arrangement of the two on the same side. Among them, when the angle between the direction of the first air inlet away from the first muffler chamber 211 and the direction of the first air outlet away from the first muffler chamber 211 is 0 degrees, it means that the two directions are consistent.

[0051] The above-mentioned noise reduction device, whose first muffler 210 is connected to the air pump 105 and reduces the noise generated by the air pump 105 during its propagation, can effectively reduce the operating noise of the disinfection system 100 in the dishwasher. In addition, the angle between the pipes connected to the first muffler 210 is small, which can be arranged on the same side, reducing the space occupancy rate of the noise reduction device installation, making it suitable for equipment with a small internal space such as a dishwasher, and facilitating the arrangement of pipes.

[0052] In some embodiments, the first muffler 210 has a plurality of structural surfaces, and the first air inlet and the first air outlet are opened on the same structural surface.

[0053] It can be understood that the first air inlet and the first air outlet are oriented perpendicular to the structural surface where they are located, that is, the hole axes of the first air inlet and the first air outlet are perpendicular to the structural surface where they are located. In other words, the first air inlet and the first air outlet are oriented in the same direction.

[0054] Specifically, the first muffler 210 may be, but is not limited to, a rectangular parallelepiped shape, and the first air inlet and the first air outlet may be opened on an end surface of the first muffler 210 in the length direction thereof.

[0055] In this way, the pipe connecting the first muffler 210 can be at least on the same side of the first muffler 210 at the connection point, and the layout of the two will not occupy the space on different sides of the first muffler 210, which is beneficial to reduce the space occupied by the first muffler 210 and facilitate the layout of the dishwasher pipes.

[0056] In addition, when the noise reduction target frequency is within a partial range, the acoustic noise reduction performance of a muffler in which the first air inlet and the first air outlet are located on the same side (referred to as a same-side inlet and outlet type muffler) is better than that of a muffler in which the air inlet and the air outlet are located on opposite sides (referred to as a straight-inlet and straight-outlet type muffler 300).

[0057] The noise reduction device has two basic performance targets. The first target is the acoustic performance parameter that describes the noise reduction amount: sound transmission loss TL=10lg(Win / Wout), Win and Wout are the sound power of the inlet and outlet of the first muffler 210 respectively. The greater the sound transmission loss means the better the noise reduction performance. The second target is the aerodynamic performance parameter that describes the pressure loss: the total pressure difference of the inlet and outlet of the first muffler 210. The smaller the total pressure difference, the better the aerodynamic performance. For the same-side inlet and outlet mufflers, reducing the total pressure difference is more helpful in improving the aerodynamic performance.

[0058] In some embodiments, the noise reduction device further includes a first air inlet pipe 220 and a first air outlet pipe 230. The first air inlet pipe 220 is connected to the first muffler chamber 211 via the first air inlet, and the length of the first air inlet pipe 220 in the first muffler chamber 211 is a first set length. The first air outlet pipe 230 is connected to the first muffler chamber 211 via the first air outlet, and the length of the first air outlet pipe 230 in the first muffler chamber 211 is a second set length. At least one of the first set length and the second set length is greater than 0.

[0059] The first air inlet pipe 220 and the first air outlet pipe 230 are pipes for connecting the noise reduction device. The first air inlet pipe 220 is plugged into the first muffler 210 through the first air inlet, and can be inserted from the first air inlet into the first muffler chamber 211. The length of the first air inlet pipe 220 in the first muffler chamber 211 is the first set length, that is, the insertion depth of the first air inlet pipe 220. The first air outlet pipe 230 is plugged into the first muffler 210 through the first air inlet, and can be inserted from the first air outlet into the first muffler chamber 211. The length of the first air outlet pipe 230 in the first muffler chamber 211 is the second set length, that is, the insertion depth of the first air outlet pipe 230. At the same time, the first set length is the distance between the end of the first air inlet pipe 220 and the inner wall where the first air inlet is located, and the second set length is the distance between the end of the first air inlet pipe 220 and the inner wall where the first air inlet is located. When the first set length or the second set length is greater than 0, it means that the corresponding pipe end of the first air inlet pipe 220 or the first air outlet pipe 230 is inserted into and located in the first muffler cavity 211, forming an interpolation to the first muffler 210. The first set length and the second set length can be the same or different. Preferably, the first set length and the second set length are both greater than 0, and the first air inlet pipe 220 and the first air outlet pipe 230 are both interpolated to the first muffler 210.

[0060] In this way, the first silencer 210 acts as an expansion chamber silencer, and the first air inlet pipe 220 and the first air outlet pipe 230 are inserted, which can reduce the pressure loss when the airflow flows into the first silencer cavity 211 through the first air inlet pipe 220 and flows out of the first silencer cavity 211 through the first air outlet pipe 230, thereby reducing the total pressure difference, thereby achieving noise reduction and reducing the impact on aerodynamic performance.

[0061] In some embodiments, the first muffler 210 includes a first body 213 and a spoiler baffle 215 . A first muffler cavity 211 is formed in the first body 213 , and the spoiler baffle 215 is disposed in the first muffler cavity 211 .

[0062] The spoiler baffle 215 is used to disturb the flow field in the first muffler chamber 211, and there is at least one spoiler baffle 215. The location of the spoiler baffle 215 in the first muffler 210 can be determined by performing flow field simulation on the first muffler chamber 211 without the spoiler baffle 215.

[0063] In this way, the spoiler baffle 215 can break up the eddy current in the first muffler chamber 211 , thereby reducing the possibility of regenerating noise due to the eddy current in the first muffler 210 .

[0064] Please also read Figure 8 , with the scheme 1 of the straight-in and straight-out type muffler 300 (such as Figure 5 As shown) as a comparative example, the same side inlet and outlet type muffler scheme 2 (as shown Figure 6 As shown in the first embodiment, the first inlet pipe 220 and the first outlet pipe 230 are inserted into the same side inlet and outlet type muffler solution 3 (as shown in the Figure 7 As shown in the second embodiment, the first air inlet pipe 220 and the first air outlet pipe 230 are inserted into the same side inlet and outlet type muffler with a spoiler baffle 215 inside (as shown in the second embodiment) Figure 4 As shown in the figure, the sound transmission loss of schemes 1-4 is tested as the third embodiment. It can be found that when the noise reduction target frequency is 300Hz-600Hz, the acoustic noise reduction performance of the same-side inlet and outlet type muffler is better than that of the straight-inlet and straight-outlet type muffler 300. By comparing the sound transmission loss, it is found that in the noise reduction target frequency band 300-600Hz, the first air inlet and outlet pipe 230 is interpolated to improve the aerodynamic performance of the same-side inlet and outlet type muffler.

[0065] Please also read Fig. 9 By comparison, it is found that the low-frequency sound transmission loss of the same-side inlet and outlet muffler is improved after the first inlet pipe 220 and the first outlet pipe 230 are inserted, and the total pressure difference between the inlet and outlet is reduced, indicating that both the acoustic performance and the aerodynamic performance are improved.

[0066] Please also read Fig.10 Through flow field simulation, it is found that there are eddies in the internal flow field of the same-side inlet and outlet muffler, which may generate regenerative noise. Please also refer to Fig.11 After adding the spoiler baffle 215, the spoiler baffle 215 can break up the vortex, which means that the spoiler baffle 215 reduces the possibility of regeneration noise.

[0067] In summary, the first muffler 210 is an expansion chamber muffler that uses the first air inlet pipe 220 and the first air outlet pipe 230 to be inserted on the same side and has a built-in spoiler baffle 215, which is used to solve the problem of high noise and small space in the dishwasher. At the same time, the design process of the first muffler 210 in the disinfection system 100 can also be summarized, namely: (1) Select the appropriate position of the first air inlet and outlet pipes 230 according to the spatial geometric restrictions; (2) Select the appropriate geometric dimensions according to the spatial conditions to improve the sound transmission loss of the first muffler 210: the length of the first muffler 210 determines the effective working frequency band of the first muffler 210, and the ratio of the cross-sectional area of ​​the first muffler 210 to the cross-sectional area of ​​the first air inlet and outlet pipes 230 determines the size of the sound transmission loss of the first muffler 210. (3) Select a suitable insertion depth to reduce the total pressure difference between the inlet and outlet of the first muffler 210. (4) Observe the flow field characteristics and add a spoiler baffle 215 at a suitable position to suppress the generation of regenerative noise.

[0068] Please also read Fig.12 In some embodiments, the noise reduction device further includes a second muffler 240 , which has a second muffler chamber 241 . One of the first muffler 210 and the second muffler 240 is used to connect to the air intake port of the air pump 105 , and the other is used to connect to the air exhaust port of the air pump 105 .

[0069] The muffler connected to the air intake of the air pump 105 is located between the condensing device 109 and the air pump 105, and the muffler connected to the air exhaust of the air pump 105 is located between the air pump 105 and the disinfectant water generating device 101. Specifically, the second muffler 240 can be installed on the installation plane 117.

[0070] In this way, the first muffler 210 and the second muffler 240 can reduce the noise of the air pump 105 at different positions, thereby reducing the overall operating noise of the dishwasher.

[0071] Furthermore, the second muffler 240 is used to connect to the air intake port of the air pump 105. The second muffler 240 also has a second air inlet and a second air outlet connected to the second muffler chamber 241. The second air inlet and the second air outlet are respectively located at opposite ends of the second muffler 240 in the gravity direction.

[0072] The second muffler 240 is used to connect the air intake port of the air pump 105, and the first muffler 210 is used to connect the air exhaust port of the air pump 105. The muffler connected to the air intake port of the air pump 105 is specifically located between the condensing device 109 and the air pump 105. Therefore, the changes of the gas in the condensing device 109 need to be fully considered.

[0073] The second air inlet and the second air outlet are respectively located at opposite ends of the second muffler 240, with one of them facing upward and the other facing downward.

[0074] In this way, the second muffler 240 is placed vertically to utilize the gravity effect and the guiding function of the pipeline so that the gas with relatively high humidity can be quickly discharged from the second muffler 240 through the pipeline, and thus the gas will hardly form condensed water inside the second muffler 240.

[0075] In some embodiments, the second muffler 240 includes a second body 243 and a second air duct 245, and a second muffler cavity 241 is formed in the second body 243. The second air duct 245 is provided in the second body 243, and includes a second noise reduction section 2451 located in the second muffler cavity 241. The second noise reduction section 2451 communicates with the second air inlet and the second air outlet, and has a second noise reduction hole 24511 on its wall that communicates with the second muffler cavity 241.

[0076] It can be understood that the second air duct 245 passes through the second air inlet and the second air outlet to be arranged on the second body 243, and its second noise reduction section 2451 extends from the second air inlet to the second air outlet. The second air duct 245 may also include a second air inlet section 2452 and a second air outlet section 2453, the second air inlet section 2452 connects the second muffler 240 and the condensing device 109, and the second air outlet section 2453 connects the second muffler 240 and the air pump 105.

[0077] In this way, the pipe wall of the second noise reduction section 2451 is perforated, so that the second muffler 240 can be used as a resonance cavity muffler, and specifically as a coaxial resonance cavity muffler, utilizing the Helmholtz resonance cavity effect, that is, utilizing the friction and damping of the air column in the pipe neck during vibration to dissipate the sound energy, thereby achieving the purpose of noise reduction.

[0078] Furthermore, the opening rate of the second noise reduction holes 24511 on the tube wall of the second noise reduction section 2451 is not less than 30%.

[0079] The opening ratio refers to the proportion of the second noise reduction hole 24511 to the tube wall area of ​​the second noise reduction section 2451. Specifically, the opening ratio of the second noise reduction hole 24511 can be but is not limited to 30%, 40%, 50%, etc., and is not specifically limited here.

[0080] In this way, the second muffler 240 can effectively muffle and reduce the noise of the gas flowing therethrough.

[0081] The internal circulation air circuit of the disinfection system 100 with noise reduction device is as follows: air pump 105-first air inlet pipe 220-first muffler 210-first air outlet pipe 230-disinfectant water generating device 101-condensing device 109-second air inlet section 2452-second muffler 240-second air outlet section 2453-air pump 105.

[0082] In order to solve the technical problem of high noise in the operation of the disinfection system 100 of the dishwasher, the above-mentioned noise reduction device is provided with a first muffler 210 as an expansion chamber muffler between the air pump 105 and the water tank 103. The first muffler 210 has an inlet and outlet pipe on the same side and has an inner insert pipe and a built-in spoiler baffle 215, which can achieve noise reduction while solving the problem of difficult arrangement of pipes in a small space. A second muffler 240 as a coaxial resonant cavity muffler is provided between the air pump 105 and the condensing device 109. The second muffler 240 is placed vertically and its inner pipe is perforated, which can achieve noise reduction while using the pipe and gravity effect to solve the problem of condensation and water accumulation inside the muffler.

[0083] In another embodiment, the first muffler 210 includes a first main body 213 and a first air duct (not shown), and a first muffler cavity 211 is formed in the first main body 213. The first air duct is arranged in the first main body 213, and includes a first noise reduction section located in the first muffler cavity 211. The first noise reduction section is connected to the first air inlet and the first air outlet, and has a first noise reduction hole connected to the first muffler cavity 211 on its wall.

[0084] The first muffler 210 is a resonant cavity muffler, and its opening rate is generally set to be above 30%. It utilizes the Helmholtz resonant cavity effect, that is, utilizes the friction and damping of the air column in the pipe neck during vibration to dissipate the sound energy, thereby achieving the purpose of noise reduction.

[0085] It can be understood that the first air duct passes through the first air inlet and the first air outlet to be arranged on the first main body 213, and its first noise reduction section extends from the first air inlet to the first air outlet. In order to connect the first air inlet and the first air outlet located on the same side, the first noise reduction section can be a U-shaped pipe section. In this case, the first muffler chamber 211 of the first muffler 210 does not need to be provided with a spoiler baffle 215.

[0086] In addition, the first air duct may also include a first air inlet section and a first air outlet section. The first air inlet section, the first noise reduction section and the first air outlet section are connected in sequence. The first air inlet section and the first air outlet section are used to connect with the air pump 105 and the disinfectant water generating device 101 respectively.

[0087] An embodiment of the present application further provides the above-mentioned disinfection system 100, including the above-mentioned noise reduction device.

[0088] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A noise reduction device, characterized in that: The noise reduction device comprises: The first muffler (210) is used to connect to the air pump (105), the first muffler (210) having a first muffler chamber (211), and having a first air inlet and a first air outlet connected to the first muffler chamber (211), and the angle between the direction of the first air inlet away from the first muffler chamber (211) and the direction of the first air outlet away from the first muffler chamber (211) is less than 90 degrees.

2. The noise reduction device according to claim 1, characterized in that: The noise reduction device further comprises a first air inlet pipe (220) and a first air outlet pipe (230), wherein the first air inlet pipe (220) is connected to the first muffler chamber (211) via the first air inlet port, and the first air outlet pipe (230) is connected to the first muffler chamber (211) via the first air outlet port, and at least one end of the first air inlet pipe (220) and the first air outlet pipe (230) is located in the first muffler chamber (211).

3. The noise reduction device according to claim 1, characterized in that: The first muffler (210) comprises a first main body (213) and a spoiler baffle (215); the first muffler cavity (211) is formed in the first main body (213); and the spoiler baffle (215) is arranged in the first muffler cavity (211).

4. The noise reduction device according to claim 1, characterized in that: The first muffler (210) comprises a first main body (213) and a first air guide pipe, and the first muffler cavity (211) is formed in the first main body (213); The first air guide pipe is arranged through the first main body (213) and comprises a first noise reduction section located in the first muffler cavity (211); the first noise reduction section is connected to the first air inlet and the first air outlet, and has a first noise reduction hole on its wall that is connected to the first muffler cavity (211).

5. The noise reduction device according to claim 1, characterized in that: The first muffler (210) has a plurality of structural surfaces, and the first air inlet and the first air outlet are opened on the same structural surface.

6. The noise reduction device according to any one of claims 1 to 5, characterized in that: The noise reduction device further comprises a second muffler (240), wherein the second muffler (240) has a second muffler chamber (241), and one of the first muffler (210) and the second muffler (240) is used to connect to an air intake port of the air pump (105), and the other is used to connect to an air exhaust port of the air pump (105).

7. The noise reduction device according to claim 6, characterized in that: The second muffler (240) is used to be connected to the air intake port of the air pump (105), and the second muffler (240) also has a second air inlet and a second air outlet connected to the second muffler chamber (241), and the second air inlet and the second air outlet are respectively located at two opposite ends of the second muffler (240) in the direction of gravity.

8. The noise reduction device according to claim 6, characterized in that: The second muffler (240) comprises a second main body (243) and a second air guide pipe (245); the second muffler cavity (241) is formed in the second main body (243); the second muffler (240) further comprises a second air inlet and a second air outlet communicated with the second muffler cavity (241); The second air guide pipe (245) is arranged through the second main body (243) and comprises a second noise reduction section (2451) located in the second silencer cavity (241); the second noise reduction section (2451) is connected to the second air inlet and the second air outlet, and has a second noise reduction hole (24511) on its wall that is connected to the second silencer cavity (241).

9. The noise reduction device according to claim 8, characterized in that: The opening rate of the second noise reduction holes (24511) on the tube wall of the second noise reduction section (2451) is not less than 30%.

10. A disinfection system, characterized in that: The method comprises a noise reduction device as described in any one of claims 1 to 9.

11. A dishwasher, characterized in that: It comprises the noise reduction device according to any one of claims 1 to 9 or the disinfection system according to claim 10.

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