Gushing arm assembly and dish washing machine

Abstract

The utility model relates to a spraying arm assembly and a dish-washing machine, and belongs to the field of household appliances. A spraying arm assembly comprises a lower spraying arm shell, an upper spraying arm shell and an upper spraying arm shell, the water inlet shell is arranged on the lower spraying arm shell, and the water inlet shell is provided with a liquid inlet channel; the water inlet shell is sleeved with the external connection shell, the external connection shell is provided with an external connection channel, a containing cavity is defined between the external connection shell and the water inlet shell, and the containing cavity communicates with outside air; the air inlet sleeve is arranged on the lower spraying arm shell, the air inlet sleeve surrounds the water inlet shell and is located between the external shell and the water inlet shell, the air inlet sleeve is located in the containing cavity, the air inlet sleeve is provided with a positive pressure opening, a positive pressure cavity is defined between the air inlet sleeve and the water inlet shell, and the positive pressure opening, the positive pressure cavity and the air inlet are sequentially communicated. According to the spraying arm assembly, air and water flow are fully mixed in the spraying arm structure, and noise generated when a water column hits bowls and chopsticks is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of household appliances, in particular to a spray arm assembly and a dishwasher. BACKGROUND

[0002] In the prior art, the water column generated by the spray arm structure of the dishwasher produces a large noise when washing the chopsticks, on the one hand, the impact noise means a certain impact force on the tableware, and the service life of the tableware will be shortened after a long cleaning time, and the household tableware replacement cost is increased. On the other hand, such noise will make the user feel annoyed and uneasy during use, and in the long run, the user will reduce the frequency of using the dishwasher, and even have a negative evaluation on the use experience of the whole dishwasher. SUMMARY

[0003] Therefore, it is necessary to provide a spray arm assembly and a dishwasher aiming at the problem that the water column sprayed by the spray arm structure of the dishwasher produces a large noise during the cleaning process.

[0004] A spray arm assembly, the spray arm assembly comprising: a lower spray arm shell, the lower spray arm shell being provided with a water inlet and an air inlet; a water inlet shell, the water inlet shell being arranged on the lower spray arm shell, the water inlet shell being provided with a liquid inlet channel; an external shell, the external shell being sleeved on the water inlet shell, the external shell being provided with an external channel, the external shell and the water inlet shell surrounding to form a containing cavity, the containing cavity being in communication with the outside air, the external channel, the liquid inlet channel and the water inlet being sequentially communicated; an air inlet sleeve, the air inlet sleeve being arranged around the water inlet shell and located between the external shell and the water inlet shell, the air inlet sleeve being located in the containing cavity, the air inlet sleeve being provided with a positive pressure port, the air inlet sleeve and the water inlet shell surrounding to form a positive pressure cavity, the positive pressure port, the positive pressure cavity and the air inlet being sequentially communicated.

[0005] The above discloses a spray arm assembly for a spray arm structure, wherein an air inlet sleeve is arranged on the lower spray arm housing, and the air inlet sleeve surrounds the water inlet housing and is arranged opposite to the outer housing. Thanks to this ingenious design, the accommodating cavity of the outer housing is in communication with the outside air, and air is delivered to the air inlet of the lower spray arm housing through the positive pressure port and the positive pressure cavity of the air inlet sleeve. At the same time, the water flow enters the booster channel of the water inlet housing from the outer channel of the outer housing, and the air inside the spray arm structure is exhausted by the water flow to form a negative pressure cavity, further optimizing the air suction and mixing process. The air and water flow are fully mixed in the spray arm structure, so that the sprayed water can mix with air, so that the water column after being hit can reduce the noise caused by the collision of the water column with the bowl and chopsticks, create a more quiet and comfortable kitchen environment, reduce the stimulation to the user's hearing, avoid the generation of irritable mood due to long time in noisy environment, and improve the experience of kitchen work. Secondly, reducing the collision noise means that the impact force on the tableware is to some extent, which helps to prolong the service life of the tableware and reduce the cost of replacing household tableware. At the same time, one end of the air inlet sleeve is in contact with one end of the water inlet housing, and the other end surrounds the water inlet housing to form a positive pressure cavity, so that air can be more smoothly and stably introduced into the positive pressure cavity, optimizing the air flow path, reducing turbulence and pressure loss, and ensuring stable air pressure supply, creating good conditions for subsequent full mixing with water flow. In terms of structural stability, this close contact and surrounding arrangement enhances the connection strength between the air inlet sleeve and the water inlet housing, making the entire device more stable during operation, reducing the risk of component displacement or loosening due to vibration or water flow impact, and improving the reliability and durability of the device. Moreover, the precise surrounding arrangement also helps to improve space utilization, making the structure of the spray arm assembly more compact and reasonable, facilitating installation and layout in the limited space of the spray arm, improving the overall practicality and adaptability, and providing a strong guarantee for efficient atomization operation.

[0006] In one of the embodiments, the cross-sectional area of the air inlet sleeve gradually increases from the end of the air inlet sleeve in contact with the water inlet shell to the end of the air inlet sleeve abutting against the lower spray arm shell, and the end of the air inlet sleeve abutting against the lower spray arm shell is oppositely arranged around the air inlet. By gradually increasing the cross-sectional area of the end of the air inlet sleeve in contact with the water inlet shell to the end of the air inlet sleeve abutting against the lower spray arm shell, the gap space between the air inlet sleeve and the water inlet shell is effectively utilized to form a positive pressure chamber, and the positive pressure chamber is communicated with the air inlet, so that the external air can smoothly enter the negative pressure chamber in the spray arm structure, the air is more efficiently mixed with the water flow, and a higher quality and finer and more uniform atomization effect is formed, thereby further improving the cleaning capacity and coverage of the spray arm, and making the cleaning operation more thorough. At the same time, the flow direction and pressure distribution of the air are optimized, the external air can accurately enter the air inlet, energy loss and turbulence phenomenon are reduced, the operation of the entire spray arm assembly is more stable and reliable, thereby prolonging the service life of the device and reducing the maintenance cost, and a more high-quality and efficient use experience is brought to the user.

[0007] In one of the embodiments, the cross-sectional area of the end of the water inlet shell in contact with the air inlet sleeve is greater than the cross-sectional area of the end connected with the lower spray arm shell. By using the cross-sectional area of the end of the water inlet shell in contact with the air inlet sleeve greater than the cross-sectional area of the end abutting against the lower spray arm shell, the fluid mechanics principle is effectively utilized to make the water flow obtain higher flow rate and kinetic energy before entering the lower spray arm shell, quickly discharge the air in the spray arm structure, and efficiently form a negative pressure chamber, thereby providing a guarantee for the external air to smoothly enter the negative pressure chamber from the positive pressure port, optimizing the mixing process of water and air in a limited space, making the air more easily rolled into the water flow, further improving the atomization effect, ensuring that the entire spray arm assembly realizes more excellent cleaning performance while being high-efficiency and water-saving, meeting the requirements of cleaning capacity of the spray arm in different scenarios, and improving the practicality and reliability of the device.

[0008] In one of the embodiments, the water inlet shell and the lower spray arm shell are integrally formed. By integrally forming the water inlet shell and the lower spray arm shell, the connection gap between the parts is reduced, the risk of water leakage is reduced, the overall sealing performance of the device is improved, and the stable transmission of the water flow and the air flow along the predetermined path is ensured, thereby avoiding performance degradation due to leakage. Secondly, the integrally formed structure enhances the mechanical strength and stability of the device, makes it more resistant to wear and impact in long-term use, reduces the loosening or damage of parts caused by vibration or external force, and prolongs the service life.

[0009] In one of the embodiments, the number of the positive pressure ports is multiple, and the multiple positive pressure ports are arranged circumferentially along the air inlet sleeve close to one end of the lower spray arm shell, and the multiple positive pressure ports are in communication with the positive pressure cavity. By arranging the multiple positive pressure ports circumferentially along the air inlet sleeve close to one end of the lower spray arm shell, air can be uniformly introduced into the positive pressure cavity from different directions, so as to ensure that the air flow entering the lower spray arm shell is more stable and uniform. This helps to form a uniform and fine atomization effect, avoids uneven atomization quality caused by uneven local air intake, and improves the stability and consistency of the overall cleaning effect. Secondly, the arrangement of multiple positive pressure ports increases the rate and total amount of air intake, and when mixed with water flow, the water can be more fully atomized, enhancing the impact force and penetration force on stains, thereby improving the cleaning efficiency, especially for some stubborn stains, which can achieve more thorough removal, meet the demand for high-efficiency and high-quality atomization operation of the spray arm, and improve the performance of the spray arm assembly in actual application.

[0010] In one of the embodiments, the number of the air inlets is multiple, and the multiple air inlets are arranged circumferentially along the water inlet, and the multiple air inlets are in communication with the positive pressure cavity. By arranging the multiple air inlets circumferentially along the water inlet, air can be uniformly introduced into the spray arm from multiple directions, and fully and uniformly mixed with the water flow, greatly optimizing the atomization effect, forming a more fine and stable atomized water flow, and improving the coverage and cleaning effect on the cleaned object. At the same time, the circumferential air intake avoids uneven local air intake, ensuring that the spray arm can produce stable atomization impact force in all directions, effectively improving the comprehensiveness and efficiency of cleaning, and enhancing the practicality and reliability of the device.

[0011] In one of the embodiments, the water inlet shell includes a first water inlet shell and a second water inlet shell, the second water inlet shell is arranged on the lower spray arm shell, one end of the first water inlet shell is arranged on the second water inlet shell, the other end of the first water inlet shell abuts against the outer shell, and the first water inlet shell and the second water inlet shell cooperate to form the liquid inlet channel. By abutting the first water inlet shell against the outer shell and mounting the second water inlet shell on the lower spray arm shell, a close and stable connection relationship is formed between the three, constituting a stable mechanical support system. During the operation of the spray arm, even if subjected to water flow impact, equipment vibration and other external forces, this mutual support and nesting structure can effectively disperse stress and reduce the risk of displacement and deformation of components, thereby ensuring the integrity and stability of the liquid inlet channel and maintaining stable water flow acceleration and negative pressure effect.

[0012] In one of the embodiments, the cross-sectional area of the second water inlet shell gradually decreases from the first water inlet shell towards the direction of the lower spray arm shell. Through the above structure, the water flow speed gradually increases, so that the water flow obtains higher flow rate and kinetic energy before entering the lower spray arm shell, enhancing the scouring ability of stains and improving the cleaning effect. Secondly, when cooperating with the air inlet sleeve, the acceleration of the water flow can better entrain air, so that the water and air are fully mixed, the atomization effect is optimized, and finer and more uniform atomized water flow is formed, expanding the coverage range.

[0013] In one of the embodiments, the first water inlet shell and the second water inlet shell are integrally formed. By integrally forming the first water inlet shell and the second water inlet shell, the splicing gap is eliminated, avoiding problems such as water leakage and loosening at the connection due to long-term water flow scouring, greatly enhancing the sealing and stability of the water inlet system, and ensuring the stability and efficiency of the water flow speed-up process.

[0014] In one of the embodiments, the second water inlet shell includes a speed-up shell and a connecting shell, the connecting shell is arranged on the lower spray arm shell, the speed-up shell is arranged on the connecting shell, the first water inlet shell is arranged on the speed-up shell, and the speed-up shell and the connecting shell are integrally formed. By integrally forming the speed-up shell and the connecting shell, the structural strength is greatly improved, ensuring that it remains stable under long-term impact of high-pressure water flow, reducing potential water leakage points, and ensuring the sealing and durability of the device. The specially designed speed-up shell can more accurately guide and accelerate the water flow, so that the water flow enters the lower spray arm shell at an ideal speed, enhancing the impact force on stains and effectively improving the cleaning efficiency. The connecting shell closely cooperates with the lower spray arm shell, optimizing the overall assembly structure.

[0015] In one of the embodiments, the outer shell comprises a first outer shell and a second outer shell, the first outer shell is used to connect with external structure, the second outer shell is arranged on the first outer shell, the first outer shell is provided with the outer channel, the second outer shell and the water inlet shell enclose the containing cavity, and the air inlet sleeve is arranged opposite to the second outer shell. By connecting the first outer shell with the external structure, the stable connection characteristics provide a reliable support foundation for the whole spray arm assembly, effectively reducing the influence of external vibration or shaking on the internal components, and ensuring the stability of the device operation. At the same time, the outer channel is arranged in the first outer shell, which can better control the flow and pressure of the water, so that the water flows smoothly into the subsequent components, avoiding poor atomization effect caused by unstable water flow. The second outer shell is arranged to contain the cavity, and is opposite to the air inlet sleeve, which creates good space conditions for the entry and circulation of air, makes the water and air transmission path inside more reasonable, reduces energy loss and turbulence phenomenon, improves energy utilization efficiency, ensures that air can be fully mixed with water flow, and optimizes the atomization effect.

[0016] In one of the embodiments, the outer channel comprises a first outer channel and a second outer channel, the first outer channel, the second outer channel, the liquid inlet channel and the water inlet are sequentially communicated, and the cross-sectional area of the second outer channel gradually decreases from one end communicated with the first outer channel to one end communicated with the liquid inlet channel. According to the above structure, according to the principle of fluid mechanics, the water flow velocity can be gradually increased, which lays a good foundation for further speed-up in the liquid inlet channel, makes the water flow rush to the water inlet with higher kinetic energy, enhances the flushing ability to the spraying area, and effectively improves the cleaning effect. Secondly, the segmented arrangement of the first outer channel and the second outer channel facilitates the preliminary pressure regulation and flow distribution of the water flow, so that the water inlet process is more stable and uniform, avoiding unstable atomization and spraying effect caused by uneven water inlet.

[0017] In one of the embodiments, a sealing ring is further included, the water inlet shell is provided with a sealing ring clamping groove, the sealing ring is sleeved in the sealing ring clamping groove of the water inlet shell, and the sealing ring abuts against the air inlet sleeve. By sleeving the sealing ring in the sealing ring clamping groove of the water inlet shell, and abutting the air inlet sleeve against the sealing ring, the sealing property of the connection part between the water inlet shell and the air inlet sleeve is effectively enhanced. This prevents water flow or air flow from leaking at the contact gap between the two, ensures that water and air can flow according to the predetermined channel, and thus guarantees the normal operation and stable performance of the spray arm assembly. Secondly, the good sealing effect avoids pressure loss caused by leakage, so that the air inlet sleeve can maintain a stable positive pressure state, ensuring that air continuously and stably enters the positive pressure cavity, and thus guaranteeing the high-quality atomization effect.

[0018] In one embodiment, an upper spray arm housing is also included. This upper spray arm housing is disposed on the lower spray arm housing and encloses a negative pressure chamber, which communicates with the water inlet and the air inlet. By disposing of the upper spray arm housing on the lower spray arm housing and enclosing it to form a negative pressure chamber, and by connecting it to the water inlet and the air inlet, the airflow characteristics are optimized. When air is introduced through the air inlet, the negative pressure draws in air more quickly and in larger quantities, allowing it to mix thoroughly with the water entering from the water inlet. This not only makes the sprayed water curtain finer and more uniform, enhancing the cleaning coverage and effect, but also reduces the noise from the water jets generated by the spray arm assembly during cleaning, improving the user experience.

[0019] A second aspect of this application discloses a dishwasher, which includes the aforementioned spray arm assembly.

[0020] The second aspect disclosed above discloses a dishwasher. Firstly, the negative pressure chamber formed by the lower spray arm housing and the upper spray arm housing further optimizes airflow intake and circulation, enhances the mixing effect of air and water, and makes the sprayed atomized water finer and more uniform, improving the cleaning coverage and effect. It can effectively clean even some hidden or hard-to-reach areas, while also reducing noise from the water jet hitting dishes, thus improving the user experience. Secondly, the negative pressure chamber is connected to the water inlet and air inlet, making the coordinated operation of water and air more efficient and meeting the needs of different cleaning tasks. It can handle both light stains and heavy grease with ease. Compared to traditional dishwashers, the dishwasher of this application better meets the actual needs of users and has high market competitiveness. Attached Figure Description

[0021] Figure 1 This is a 3D view of the spray arm assembly;

[0022] Figure 2 This is an exploded view of the spray arm structure;

[0023] Figure 3 This is a first cross-sectional view of the spray arm structure;

[0024] Figure 4 for Figure 3 A magnified view of a portion of region A;

[0025] Figure 5 This is a second cross-sectional view of the spray arm structure;

[0026] Figure 6 for Figure 5 A magnified view of a portion of region B;

[0027] Figure 7 This is a first perspective view of the lower spray arm housing and the water inlet housing;

[0028] Figure 8 Fig. 2 is a sectional view of the lower spray arm shell and the water inlet shell; Figure 7 Fig. 3 is a partial enlarged view of the C area of Fig. 2;

[0029] Figure 9 Fig. 4 is a second perspective view of the lower spray arm shell and the water inlet shell;

[0030] Figure 10 Fig. 5 is a partial enlarged view of the D area of Fig. 4; Figure 9 Fig. 6 is a sectional view of the outer shell;

[0031] Figure 11 Fig. 7 is a sectional view of the outer shell;

[0032] Figure 12 Fig. 8 is a perspective view of the air inlet sleeve.

[0033] In the drawings, the correspondence between the reference signs and the component names is as follows:

[0034] 1. The lower spray arm shell, 101. The water inlet, 102. The air inlet;

[0035] 2. The water inlet shell, 21. The first water inlet shell, 22. The second water inlet shell, 221. The speed-up shell, 222. The connecting shell, 201. The liquid inlet channel, 202. The sealing ring clamping groove;

[0036] 3. The outer shell, 31. The first outer shell, 32. The second outer shell, 301. The outer channel, 3011. The first outer channel, 3012. The second outer channel, 302. The accommodating cavity;

[0037] 4. The air inlet sleeve, 401. The positive pressure port, 402. The positive pressure cavity;

[0038] 5. The sealing ring;

[0039] 6. The upper spray arm shell, 601. The negative pressure cavity. DETAILED DESCRIPTION

[0040] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the following will further describe the present application in conjunction with the drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0041] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other ways different from those described herein, therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0042] Some embodiments of the present application will be described below with reference to the accompanying drawings.

[0043] Embodiment 1

[0044] As Figures 1 to 12 shown, the embodiment discloses a spray arm assembly, comprising: a lower spray arm shell 1, the lower spray arm shell 1 is provided with a water inlet 101 and an air inlet 102; a water inlet shell 2, the water inlet shell 2 is arranged on the lower spray arm shell 1, the water inlet shell 2 is provided with a liquid inlet channel 201; an external shell 3, the external shell 3 is sleeved on the water inlet shell 2, the external shell 3 is provided with an external channel 301, the external shell 3 and the water inlet shell 2 are surrounded to form a containing cavity 302, the containing cavity 302 is communicated with the external air, the external channel 301, the liquid inlet channel 201 and the water inlet 101 are communicated in sequence; an air inlet sleeve 4, the air inlet sleeve 4 is arranged around the water inlet shell 2 and located between the external shell 3 and the water inlet shell 2, the air inlet sleeve 4 is located in the containing cavity 302, the air inlet sleeve 4 is provided with a positive pressure port 401, the air inlet sleeve 4 and the water inlet shell 2 are surrounded to form a positive pressure cavity 402, the positive pressure port 401, the positive pressure cavity 402 and the air inlet 102 are communicated in sequence.

[0045] The application discloses a spray arm assembly for a spray arm structure. The air inlet sleeve 4 is arranged on the lower spray arm shell 1, and the air inlet sleeve 4 is arranged around the water inlet shell 2 and opposite to the outer shell 3. Due to the ingenious design, the containing cavity 302 of the outer shell 3 is in communication with the outside air, and air is delivered to the air inlet 102 of the lower spray arm shell 1 through the positive pressure port 401 and the positive pressure cavity 402 of the air inlet sleeve 4. At the same time, the water flow enters the booster channel 201 of the water inlet shell 2 from the outer channel 301 of the outer shell 3, and the air in the spray arm structure is exhausted by the water flow to form a negative pressure cavity, further optimizing the air suction and mixing process. The air and water flow are fully mixed in the spray arm structure, so that the sprayed water can mix with air, so that the water column after being hit can reduce the noise generated by the collision of the water column with the bowl and chopsticks, create a more quiet and comfortable kitchen environment, reduce the stimulation to the user's hearing, avoid the generation of irritable emotions due to long-term stay in a noisy environment, and improve the experience of kitchen work. Secondly, reducing the collision noise means that the impact force on the tableware is alleviated to some extent, which helps to prolong the service life of the tableware and reduce the cost of replacing household tableware. At the same time, one end of the air inlet sleeve 4 is in contact with one end of the water inlet shell 2, and the other end surrounds the water inlet shell 2 to form a positive pressure cavity 402, so that air can be more smoothly and stably introduced into the positive pressure cavity 402, optimizing the air flow path, reducing turbulence and pressure loss, and ensuring stable air pressure supply, creating good conditions for subsequent full mixing with water flow. In terms of structural stability, the close contact and surrounding arrangement enhance the connection strength between the air inlet sleeve 4 and the water inlet shell 2, so that the whole device is more stable during operation, reduces the risk of part displacement or loosening caused by vibration or water flow impact, and improves the reliability and durability of the device. Moreover, the precise surrounding arrangement also helps to improve the space utilization, so that the structure of the spray arm assembly is more compact and reasonable, facilitating installation and layout in the limited space of the spray arm, improving the overall practicality and adaptability, and providing a powerful guarantee for efficient atomization operation.

[0046] As Figure 5 And Figure 6As shown, in addition to the features of the above embodiments, the present embodiment is further limited that: the cross-sectional area of the air inlet sleeve 4 gradually increases from the end of the air inlet sleeve 4 in contact with the water inlet shell 2 to the end of the air inlet sleeve 4 abutting the lower spray arm shell 1, and the end of the air inlet sleeve 4 abutting the lower spray arm shell 1 is oppositely arranged around the air inlet 102. By gradually increasing the cross-sectional area of the end of the air inlet sleeve 4 in contact with the water inlet shell 2 to the end of the air inlet sleeve 4 abutting the lower spray arm shell 1, the gap space between the air inlet sleeve 4 and the water inlet shell 2 is effectively utilized to form a positive pressure chamber 402, and the positive pressure chamber 402 is communicated with the air inlet 102, so that the external air can smoothly enter the negative pressure chamber in the spray arm structure, the air is more efficiently mixed with the water flow, and a higher quality, finer and more uniform atomization effect is formed, further improving the cleaning capacity and coverage of the spray arm, making the cleaning operation more thorough. At the same time, the flow direction and pressure distribution of the air are optimized, ensuring that the external air can accurately enter the air inlet 102, reducing energy loss and turbulence phenomenon, making the operation of the entire spray arm assembly more stable and reliable, thereby prolonging the service life of the device and reducing the maintenance cost, and bringing a better and more efficient use experience to the user.

[0047] As shown in Figure 5 and Figure 6 As shown, in addition to the features of the above embodiments, the present embodiment is further limited that: the cross-sectional area of the air inlet sleeve 4 gradually increases from the end of the air inlet sleeve 4 in contact with the water inlet shell 2 to the end of the air inlet sleeve 4 abutting the lower spray arm shell 1, and the end of the air inlet sleeve 4 abutting the lower spray arm shell 1 is oppositely arranged around the air inlet 102. By gradually increasing the cross-sectional area of the end of the air inlet sleeve 4 in contact with the water inlet shell 2 to the end of the air inlet sleeve 4 abutting the lower spray arm shell 1, the gap space between the air inlet sleeve 4 and the water inlet shell 2 is effectively utilized to form a positive pressure chamber 402, and the positive pressure chamber 402 is communicated with the air inlet 102, so that the external air can smoothly enter the negative pressure chamber in the spray arm structure, the air is more efficiently mixed with the water flow, and a higher quality, finer and more uniform atomization effect is formed, further improving the cleaning capacity and coverage of the spray arm, making the cleaning operation more thorough. At the same time, the flow direction and pressure distribution of the air are optimized, ensuring that the external air can accurately enter the air inlet 102, reducing energy loss and turbulence phenomenon, making the operation of the entire spray arm assembly more stable and reliable, thereby prolonging the service life of the device and reducing the maintenance cost, and bringing a better and more efficient use experience to the user.

[0048] As shown in Figure 7As shown, in addition to the features of the above embodiments, this embodiment further specifies that the water inlet housing 2 and the lower spray arm housing 1 are integrally formed. By integrally forming the water inlet housing 2 and the lower spray arm housing 1, the connection gaps between components are reduced, the risk of leakage is lowered, the overall sealing performance of the device is improved, and the water flow and airflow can be stably transmitted along a predetermined path, avoiding performance degradation due to leakage. Secondly, the integrally formed structure enhances the mechanical strength and stability of the device, making it more resistant to wear and impact during long-term use, reducing component loosening or damage caused by vibration or external forces, and extending its service life.

[0049] like Figure 3 , Figure 4 and Figure 12 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the number of positive pressure ports 401 is multiple, and the multiple positive pressure ports 401 are arranged circumferentially along one end of the air inlet sleeve 4 near the lower spray arm housing 1, and all the multiple positive pressure ports 401 are connected to the positive pressure chamber 402. By arranging the multiple positive pressure ports 401 circumferentially along one end of the air inlet sleeve 4 near the lower spray arm housing 1, air can be uniformly entered into the positive pressure chamber 4002 from different directions, thereby ensuring that the airflow entering the lower spray arm housing 1 is more stable and uniform. This helps to form a uniform and fine atomization effect, avoids uneven atomization quality caused by uneven local air intake, and improves the stability and consistency of the overall cleaning effect. Secondly, the multiple positive pressure ports 401 increase the rate and total amount of air entering the system. When mixed with water, this allows for more thorough atomization of the water, enhancing its impact and penetration on stains, thereby improving cleaning efficiency. In particular, it enables more thorough removal of stubborn stains, meeting the demand for efficient and high-quality atomization operations of the spray arm and improving the performance of the spray arm assembly in practical applications.

[0050] like Figure 7 and Figure 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the number of air inlets 102 is multiple, the multiple air inlets 102 are arranged circumferentially along the water inlet 101, and the multiple air inlets 102 are connected to the positive pressure chamber 402. By arranging multiple air inlets 102 circumferentially along the water inlet 101, air is uniformly introduced into the spray arm from multiple directions, and is fully and uniformly mixed with the water flow, which greatly optimizes the atomization effect, forms a finer and more stable atomized water flow, and improves the coverage and cleaning effect of the cleaned objects. At the same time, the circumferential air intake method avoids uneven local air intake, ensuring that the spray arm can generate a stable atomized impact force in all directions, effectively improving the comprehensiveness and efficiency of cleaning, and enhancing the practicality and reliability of the device.

[0051] like Figure 5 , Figure 6 , Figure 9 andFigure 10 As shown, in addition to the features of the above embodiments, this embodiment further defines: the water inlet housing 2 includes a first water inlet housing 21 and a second water inlet housing 22. The second water inlet housing 22 is disposed on the lower spray arm housing 1. One end of the first water inlet housing 21 is disposed on the second water inlet housing 22, and the other end of the first water inlet housing 21 abuts against the outer housing 3. The first water inlet housing 21 and the second water inlet housing 22 cooperate to form a liquid inlet channel 201. By abutting the first water inlet housing 21 against the outer housing 3 and installing the second water inlet housing 22 on the lower spray arm housing 1, a tight and stable connection relationship is formed between the three, constituting a stable mechanical support system. During the operation of the spray arm, even when subjected to external forces such as water flow impact and equipment vibration, this mutually supporting and nested structure can effectively disperse stress, reduce the risk of component displacement and deformation, thereby ensuring the integrity and stability of the liquid inlet channel and maintaining a stable water flow rate and negative pressure effect.

[0052] like Figure 5 and Figure 6 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the cross-sectional area of ​​the second water inlet housing 22 gradually decreases from the first water inlet housing 21 toward the lower spray arm housing 1. Through the above structure, the water flow velocity can be gradually increased, allowing the water flow to obtain higher velocity and kinetic energy before entering the lower spray arm housing, enhancing the ability to flush away stains and improving the cleaning effect. Secondly, when used in conjunction with the air inlet sleeve 4, the accelerated water flow can better entrain air, allowing water and air to mix thoroughly, optimizing the atomization effect, forming a finer and more uniform atomized water flow, and expanding the coverage area.

[0053] like Figure 9 and Figure 10 As shown, in addition to the features of the above embodiments, this embodiment further specifies that the first water inlet housing 21 and the second water inlet housing 22 are integrally formed. By integrally forming the first water inlet housing 21 and the second water inlet housing 22, the splicing gaps are eliminated, avoiding problems such as water leakage and loosening at the connection caused by long-term water flow erosion, greatly enhancing the sealing and stability of the water inlet system, and ensuring the stable and efficient water flow acceleration process.

[0054] like Figure 7 , Figure 9 and Figure 10As shown, in addition to the features of the above embodiments, this embodiment is further defined as: the second water inlet shell 22 comprises a speed-up shell 221 and a connecting shell 222, the connecting shell 222 is arranged on the lower spray arm shell 1, the speed-up shell 221 is arranged on the connecting shell 222, the first water inlet shell 21 is arranged on the speed-up shell 221, and the speed-up shell 221 and the connecting shell 222 are integrally formed. By integrally forming the speed-up shell 221 and the connecting shell 222, the structural strength is greatly improved, ensuring that it remains stable under long-term impact of high-pressure water flow, reducing potential water leakage points, and ensuring the sealing and durability of the device. The specially designed speed-up shell 221 can more accurately guide and accelerate the water flow, so that the water flow enters the lower spray arm shell 1 at an ideal speed, enhancing the impact force on stains and effectively improving cleaning efficiency. The connecting shell and the lower spray arm shell closely cooperate to optimize the overall assembly structure.

[0055] As shown in Figure 5 , Figure 6 and Figure 11 , in addition to the features of the above embodiments, this embodiment is further defined as: the outer shell 3 comprises a first outer shell 31 and a second outer shell 32, the first outer shell 31 is used to connect with external structures, the second outer shell 32 is arranged on the first outer shell 31, the first outer shell 31 is provided with an outer connecting channel 301, and the second outer shell 32 and the water inlet shell 2 form an accommodating cavity 302 therebetween, and the air inlet sleeve 4 is arranged opposite to the second outer shell 32. By connecting the first outer shell 31 with external structures, its stable connection characteristics provide a reliable support foundation for the entire spray arm assembly, effectively reducing the influence of external vibration or shaking on internal components, and ensuring the stability of the device operation. At the same time, the outer connecting channel 301 is arranged in the first outer shell 31, which can better control the flow and pressure of the water inlet, so that the water flow enters the subsequent components smoothly, avoiding poor atomization effect caused by unstable water flow. The second outer shell 32 is arranged to form the accommodating cavity 302, and is opposite to the air inlet sleeve 4, which creates good space conditions for the entry and circulation of air, making the internal water and gas transmission path more reasonable, reducing energy loss and turbulence phenomenon, improving energy utilization efficiency, ensuring that air can be fully mixed with water flow, and optimizing the atomization effect.

[0056] As shown in Figure 5 and Figure 6As shown, in addition to the features of the above embodiments, the present embodiment is further defined as: the outer connecting channel 301 comprises a first outer connecting channel 3011 and a second outer connecting channel 3012, the first outer connecting channel 3011, the second outer connecting channel 3012, the liquid inlet channel 201 and the water inlet 101 are sequentially communicated, and the cross-sectional area of the second outer connecting channel 3012 gradually decreases from one end connected with the first outer connecting channel 3011 to one end connected with the liquid inlet channel 201. Through the above structure, according to the principle of fluid mechanics, the water flow velocity can be gradually increased, laying a good foundation for further speed increase in the liquid inlet channel 201, so that the water flow can rush to the water inlet 101 with higher kinetic energy, enhancing the flushing ability to the spraying area and effectively improving the cleaning effect. Secondly, the segmented arrangement of the first outer connecting channel 3011 and the second outer connecting channel 3012 facilitates the preliminary pressure regulation and flow distribution of the water flow, making the water inlet process more stable and uniform, and avoiding the instability of atomization and spraying effect caused by uneven water inlet.

[0057] As shown in Figure 5 , Figure 6 , Figure 7 and Figure 8 , in addition to the features of the above embodiments, the present embodiment is further defined as: further comprising a sealing ring 5, the water inlet shell 2 is provided with a sealing ring clamping groove 202, the sealing ring 5 is sleeved at the sealing ring clamping groove 202 of the water inlet shell 2, and the sealing ring 5 abuts against the air inlet sleeve 4. By sleeving the sealing ring 5 in the sealing ring clamping groove 202 of the water inlet shell 2, and at the same time the air inlet sleeve 4 abuts against the sealing ring 5, the sealing property of the connecting part between the water inlet shell 2 and the air inlet sleeve 4 is effectively enhanced. This prevents water flow or air flow from leaking at the contact gap between the two, ensures that water and air can flow according to the predetermined channel, and thus guarantees the normal operation and stable performance of the spray arm assembly. Secondly, the good sealing effect avoids the pressure loss caused by leakage, so that the air inlet sleeve 4 can maintain a stable positive pressure state, ensuring that air continuously and stably enters the positive pressure cavity 402, and thus guaranteeing the high-quality atomization effect.

[0058] As shown in Figure 2 , Figure 3 and Figure 4As shown, in addition to the features of the above embodiments, the present embodiment is further limited: further comprising an upper spray arm shell 6, the upper spray arm shell 6 is arranged on the lower spray arm shell 1 and encloses a negative pressure cavity 601, the negative pressure cavity 601 is communicated with the water inlet 101 and the air inlet 102. By arranging the upper spray arm shell 6 on the lower spray arm shell 1 and enclosing the negative pressure cavity 601, and making it communicated with the water inlet 101 and the air inlet 102, the flow characteristics of the air flow are optimized, when the air is introduced into the air inlet 102, due to the suction effect of the negative pressure, the air can flow into more quickly and in large quantities, and fully mix with the water flow from the water inlet 101. This not only makes the sprayed water curtain more fine and uniform, enhances the coverage and effect of cleaning, but also can reduce the noise of the water column generated by the spray arm assembly during cleaning, and improve the user experience.

[0059] Embodiment 2

[0060] As Figures 1 to 12 shown, the present embodiment discloses a dishwasher, comprising: the spray arm assembly described above.

[0061] The second aspect of the present application discloses a dishwasher. First, the negative pressure cavity 601 formed by the lower spray arm shell 1 and the upper spray arm shell 6 can further optimize the suction and circulation of the air flow, enhance the mixing effect of air and water flow, make the sprayed atomized water more fine and uniform, and improve the coverage and effect of cleaning. Some hidden or hard-to-reach areas can also be effectively cleaned, and the noise generated by the collision of the water column hitting the dishes can also be reduced, improving the user experience. Secondly, the negative pressure cavity 601 is communicated with the water inlet 101 and the air inlet 102, making the cooperation of water and air more efficient, meeting the needs of different cleaning tasks, whether it is light or heavy oil stains, it can be easily handled. Compared with the traditional dishwasher, the dishwasher of the present application can better meet the actual use needs of users and has high market competitiveness.

[0062] The technical features of the above-mentioned embodiments can be combined arbitrarily, in order to make the description simple, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the scope of the present application.

[0063] The above-mentioned embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A spray arm assembly, characterized by, The spray arm assembly comprises: a lower spray arm shell (1) provided with a water inlet (101) and an air inlet (102); a water inlet shell (2) arranged on the lower spray arm shell (1), the water inlet shell (2) being provided with a liquid inlet channel (201); an outer shell (3) sleeved on the water inlet shell (2), the outer shell (3) being provided with an outer channel (301), and the outer shell (3) and the water inlet shell (2) surrounding the containing cavity (302) to form a containing cavity (302) in communication with the outside air, the outer channel (301), the liquid inlet channel (201) and the water inlet (101) being sequentially communicated; an air inlet sleeve (4) arranged around the water inlet shell (2) and located between the outer shell (3) and the water inlet shell (2), the air inlet sleeve (4) being located in the containing cavity (302), the air inlet sleeve (4) being provided with a positive pressure port (401), the air inlet sleeve (4) and the water inlet shell (2) surrounding the positive pressure cavity (402) to form a positive pressure cavity (402), the positive pressure port (401), the positive pressure cavity (402) and the air inlet (102) being sequentially communicated.

2. The spray arm assembly according to claim 1, wherein the cross-sectional area of the air inlet sleeve (4) gradually increases from the end of the air inlet sleeve (4) in contact with the water inlet shell (2) to the end of the air inlet sleeve (4) abutting against the lower spray arm shell (1), and the end of the air inlet sleeve (4) abutting against the lower spray arm shell (1) is oppositely arranged around the air inlet (102); and / or the cross-sectional area of the end of the water inlet shell (2) in contact with the air inlet sleeve (4) is greater than that of the end connected with the lower spray arm shell (1); and / or the water inlet shell (2) is integrally formed with the lower spray arm shell (1).

3. The spray arm assembly according to claim 1, wherein the number of the positive pressure ports (401) is multiple, the multiple positive pressure ports (401) are circumferentially arranged along the end of the air inlet sleeve (4) close to the lower spray arm shell (1), and the multiple positive pressure ports (401) are all communicated with the positive pressure cavity (402); and / or the number of the air inlets (102) is multiple, the multiple air inlets (102) are circumferentially arranged along the water inlet (101), and the multiple air inlets (102) are communicated with the positive pressure cavity (402).

4. The spray arm assembly of claim 1, wherein, The water inlet shell (2) comprises a first water inlet shell (21) and a second water inlet shell (22), the second water inlet shell (22) is arranged on the lower spray arm shell (1), one end of the first water inlet shell (21) is arranged on the second water inlet shell (22), the other end of the first water inlet shell (21) abuts against the outer shell (3), and the first water inlet shell (21) and the second water inlet shell (22) cooperatively form the liquid inlet channel (201).

5. The spray arm assembly according to claim 4, characterized in that The cross-sectional area of the second water inlet shell (22) gradually decreases from the first water inlet shell (21) towards the lower spray arm shell (1); And / or the first water inlet shell (21) and the second water inlet shell (22) are integrally formed.

6. The spray arm assembly of claim 4, wherein, The second water inlet shell (22) comprises a speed-up shell (221) and a connecting shell (222), the connecting shell (222) is arranged on the lower spray arm shell (1), the speed-up shell (221) is arranged on the connecting shell (222), the first water inlet shell (21) is arranged on the speed-up shell (221), and the speed-up shell (221) and the connecting shell (222) are integrally formed.

7. The spray arm assembly of claim 1, wherein, The outer connecting channel (301) comprises a first outer connecting channel (3011) and a second outer connecting channel (3012), the first outer connecting channel (3011), the second outer connecting channel (3012), the liquid inlet channel (201) and the water inlet (101) are sequentially communicated, and the cross-sectional area of the second outer connecting channel (3012) gradually decreases from one end communicated with the first outer connecting channel (3011) to one end communicated with the liquid inlet channel (201).

8. The spray arm assembly of claim 1, wherein, Further comprising a sealing ring (5), the water inlet shell (2) is provided with a sealing ring clamping groove (202), the sealing ring (5) is sleeved at the sealing ring clamping groove (202) of the water inlet shell (2), and the sealing ring (5) abuts against the air inlet sleeve (4).

9. The spray arm assembly of claim 1, wherein, Further comprising an upper spray arm shell (6), the upper spray arm shell (6) is arranged on the lower spray arm shell (1) and encloses a negative pressure cavity (601), and the negative pressure cavity (601) is communicated with the water inlet (101) and the air inlet (102).

10. A dishwasher, characterized in that The dishwasher comprises: The spray arm assembly according to any one of claims 1 to 9.

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