Dishwasher spray device, dishwasher and control method thereof

Abstract

The present application relates to the technical field of dishwashers, and discloses a dishwasher spraying device, a dishwasher and a control method thereof, the dishwasher spraying device comprising: a spraying arm provided with water outlets; a main water inlet channel; a plurality of branch water inlet channels connected between the spraying arm and the main water inlet channel, which separate the spraying arm into a plurality of independent spraying areas; a pressure detection module for detecting water pressure information of each branch water inlet channel; a spraying adjustment module for adjusting the opening size of the water outlets of each spraying area; and a control module for controlling the spraying adjustment module to adjust the opening size of the water outlets of each spraying area according to the water pressure information detected by the pressure detection module. Through the above design, the opening size of the water outlets of each area is automatically adjusted with the change in water pressure, ensuring stable water pressure and uniform spraying of the spraying arm in the whole area, so that the cleaning force of each area is consistent under different tableware loads, and there is no dead angle or overflushing, thereby improving cleaning uniformity.

Description

Technical Field

[0001] This invention relates to the field of dishwasher technology, and more specifically to dishwasher spray devices, dishwashers, and control methods thereof. Background Technology

[0002] Existing dishwasher spray arms generally have the following technical defects: First, the water pressure distribution is uneven. The cleaning force is insufficient in the far-end area due to the resistance along the flow, while the rinsing force is too strong in the near-end area, which cannot adapt to the load changes caused by the density of tableware; Second, the water flow rate is not adjustable, and the nozzle outlet diameter cannot adaptively balance according to water pressure fluctuations, which can easily cause local cleaning dead spots or water waste. Summary of the Invention

[0003] In view of this, the present invention provides a dishwasher spray device, a dishwasher and a control method thereof, to solve the problems of the non-adjustable flow rate and uneven pressure distribution of the spray arm in the prior art dishwasher.

[0004] In a first aspect, the present invention provides a dishwasher spray device, comprising: The spray arm is ring-shaped and has several water outlet holes along its circumference; The main water inlet channel is located in the center of the spray arm and is used to supply water to the spray arm; Multiple branch water inlet channels are connected between the spray arm and the main water inlet channel, and the multiple branch water inlet channels are arranged at intervals along the circumference of the spray arm, dividing the spray arm into multiple independent spray areas. The pressure detection module is located at the intersection of the main water inlet channel and the branch water inlet channel, or is located inside the branch water inlet channel, and is used to detect the water pressure information of each branch water inlet channel; The spray adjustment module is located at the water outlet or branch water inlet channel and is used to adjust the opening size of the water outlet in each spray area. The control module is electrically connected to the pressure detection module and the spray adjustment module respectively. The control module is used to control the spray adjustment module to adjust the opening size of the water outlet holes in each spray area according to the water pressure information detected by the pressure detection module. Beneficial effects: Through the zoned design of the annular spray arm, main water inlet channel, and branch water inlet channels, the spray arm is divided into multiple independent spray zones. By incorporating a pressure detection module within the branch water inlet channel and a spray adjustment module at the water outlet, the control module dynamically adjusts the opening size of the corresponding water outlet based on the water pressure information of each zone. This achieves an adaptive balance between water pressure and flow rate. The opening size of the water outlet in each zone automatically adjusts with changes in water pressure, ensuring precise distribution of flow rate across the zones. This guarantees stable water pressure and uniform spraying throughout the entire spray arm, resulting in consistent cleaning force across all zones under different tableware loads, eliminating dead zones and over-rinsing, thus improving cleaning uniformity. This solves the problems of unadjustable flow rate and uneven pressure distribution in traditional spray arms.

[0005] In one optional implementation, the pressure detection module includes multiple pressure sensors, each corresponding to one of the multiple branch water inlet channels. Beneficial effects: By setting up multiple pressure sensors and corresponding them with multiple branch water inlet channels, accurate water pressure information for each spray area can be collected. Compared with single-point pressure detection, zone pressure data can better reflect local load differences, such as high water pressure caused by dense tableware in a certain area. This provides more accurate input for the spray adjustment module, improving the response speed and accuracy of flow control. In one optional embodiment, the spray arm is provided with multiple partition ribs, and the multiple partition ribs are provided one-to-one with multiple branch water inlet channels; Multiple dividing ribs divide the inner cavity of the spray arm into multiple independent spray zones, and each spray zone is connected to a branch water inlet channel.

[0006] Beneficial effects: The spray arm's inner cavity is divided into independent spray zones by the partition ribs. Each zone is connected to a corresponding branch water inlet channel, physically isolating it to avoid water flow interference. This ensures that the pressure detection module collects water pressure information for a single zone, and the spray adjustment module's actions only affect the flow rate of the corresponding zone, further enhancing the independence of zone control. Furthermore, this design effectively ensures that the water flow is evenly distributed throughout the entire circumference of the spray arm, preventing water from concentrating on one side and causing uneven water flow distribution, which could affect the cleaning effect on tableware.

[0007] In one alternative implementation, the spray arm includes: The main body is circular and divided into multiple spray zones, with each spray zone having an installation opening. The disassembly and assembly part is arc-shaped and can be detachably installed in the installation opening. The disassembly and assembly part is provided with a water outlet. The spray adjustment module is detachably installed in the water outlet. There are multiple disassembly and assembly parts, and each disassembly and assembly part is installed in a corresponding installation opening.

[0008] Beneficial effects: The spray arm adopts a split design of main body and disassembly part. The disassembly part can be detached and installed in the installation opening. The spray adjustment module is integrated in the water outlet of the disassembly part. When maintenance or replacement of the spray adjustment module is required, only the corresponding disassembly part needs to be disassembled. There is no need to replace the entire spray arm. This makes it easy to disassemble and clean the inside of the spray arm or replace the spray adjustment module, which greatly reduces maintenance costs and improves user experience.

[0009] In one optional implementation, the spray control module includes: The nozzle is located at the water outlet. A miniature regulating valve is provided at the nozzle outlet to block or open at least part of the nozzle outlet. The driving component and the nozzle are rotatably mounted in the water outlet hole. The driving component is connected to the nozzle and is adapted to drive the nozzle to rotate in order to adjust the spray direction. Beneficial effects: By driving the nozzle to rotate and adjust the spray direction, combined with a micro-adjusting valve to block or open the nozzle outlet, dual adjustment of "orifice size + spray angle" can be achieved. For example, when the pressure in a certain area is too high, the orifice size can be increased and the spray angle adjusted to avoid densely packed tableware, further improving the uniformity of cleaning.

[0010] In one optional implementation, the spray control module includes: A miniature regulating valve is installed in the branch water inlet channel to adjust the opening of the branch water inlet channel, thereby adjusting the water pressure at the outlet. The water outlet is designed to be a flexible outlet that can automatically contract or expand according to the water pressure.

[0011] Beneficial effects: The water outlet is designed as an adaptive flexible outlet: it automatically expands when the water pressure is high and automatically contracts when the water pressure is low. The size of the water outlet opening can be adjusted by controlling the water pressure of each branch inlet channel through a micro-regulating valve. The spray adjustment module uses a combination of adaptive mechanical and electronic control to adjust the size of the water outlet opening, making control simpler.

[0012] In one optional embodiment, the dishwasher spray device further includes an ultraviolet sterilization module; The ultraviolet sterilization module includes a first ultraviolet lamp disposed within the main water inlet channel, the first ultraviolet lamp being used to sterilize the water flowing through the main water inlet channel using ultraviolet light; and / or, The ultraviolet sterilization module includes a second ultraviolet lamp disposed on the outer wall of the spray arm, which is used to sterilize the tableware inside the dishwasher.

[0013] Beneficial effects: By using a first ultraviolet lamp installed in the main water inlet channel to instantly sterilize the water flow with ultraviolet light, and a second ultraviolet lamp on the outer wall of the spray arm to irradiate the surface of the tableware with ultraviolet light for a second time, a dual sterilization path of "water flow-tableware" is formed. Compared with a single sterilization method, the coverage is more comprehensive. In particular, it can achieve synergistic killing of stubborn bacteria, which greatly improves the sterilization effect of tableware.

[0014] In one optional embodiment, the dishwasher spray device further includes: The high-temperature sterilization module is installed in the main water inlet channel and is used to sterilize the water flowing through the main water inlet channel at high temperature.

[0015] Beneficial effects: The high-temperature sterilization module installed in the water inlet channel can instantly heat the water flow, forming a high-temperature + ultraviolet composite sterilization mode combined with ultraviolet sterilization. High temperature increases the permeability of bacterial cell membranes, allowing ultraviolet light to penetrate more easily for deep sterilization. The synergy of these two modes significantly improves the sterilization effect and efficiency.

[0016] In one alternative embodiment, the inner and outer walls of the spray arm, the main water inlet channel, and the branch water inlet channels are all coated with an antibacterial coating.

[0017] Beneficial effects: By coating the inner and outer walls of the spray arm, main water inlet channel, and branch water inlet channel with an antibacterial coating, biofilm formation can be inhibited, bacteria can be prevented from growing between two washing cycles, and the inside of the spray arm can be prevented from becoming a secondary source of pollution, thus achieving long-term protection of active antibacterial and passive sterilization.

[0018] Secondly, the present invention also provides a dishwasher, including an inner tub and a dishwasher spray device of any of the above embodiments installed at the bottom of the inner tub.

[0019] Thirdly, the present invention also provides a control method applicable to the above-mentioned dishwasher, the control method comprising: Control the dishwasher to perform the main wash cycle; Obtain water pressure information for each branch water inlet channel of the dishwasher spray device; When it is determined that the pressure in the branch water inlet channel is greater than the first set pressure threshold, the spray adjustment module is controlled to increase the opening size of the water outlet in the corresponding spray area. When it is determined that the pressure in the branch water inlet channel is less than the second set pressure threshold, the spray adjustment module is controlled to reduce the opening size of the water outlet in the corresponding spray area.

[0020] Beneficial Effects: During the main wash cycle of the dishwasher, a closed-loop control system—comprising "main wash cycle - pressure acquisition - threshold judgment - water outlet opening size adjustment"—ensures constant water pressure in each zone and enables independent flow regulation across multiple zones, guaranteeing consistent water intensity on the inner, outer, and distal ends of the spray arms. Specifically, water flows from the central main inlet channel into each branch inlet channel. The pressure detection module in each branch inlet channel collects water pressure data in real time. When high pressure is detected in one or more branch inlet channels, the spray adjustment module increases its opening, enlarging the opening of the water outlets in the corresponding spray area and reducing pressure. Conversely, when low pressure is detected in one or more branch inlet channels, the spray adjustment module decreases its opening, reducing the opening of the water outlets in the corresponding spray area and increasing spray force. This provides comprehensive cleaning and sterilization of the dishes. This design achieves balanced flow control across zones, ultimately resulting in uniform cleaning, efficient sterilization, energy and water conservation, and stable and reliable cleaning performance.

[0021] In one optional implementation, the first set pressure threshold p1 = target water pressure - Δp, and the second set pressure threshold p2 = target water pressure + Δp; Control methods also include: When it is determined that the pressure of the branch water inlet channel is between the first set pressure threshold and the second set pressure threshold, the opening size of the water outlet of the corresponding spray area is kept unchanged.

[0022] Beneficial effects: When the pressure of the branch water inlet channel is detected to be between the first set pressure threshold p1 and the second set pressure threshold p2, the spray adjustment module is controlled to maintain the current valve position, so that the opening size of the water outlet remains unchanged, maintaining stable spraying and avoiding system oscillation caused by frequent adjustment. This ensures the accuracy of pressure control and extends the service life of the spray adjustment module.

[0023] In one optional implementation, the high-temperature sterilization module of the dishwasher spray device is set to a first power when performing high-temperature sterilization; During the main wash cycle, or within a set time period before the end of the main wash cycle, the dishwasher also performs the following steps: The high-temperature sterilization module of the dishwasher spray device is activated and operates at the second power to preheat the spray water; The second power is less than the first power.

[0024] Beneficial effects: During or before the main wash, the high-temperature sterilization module is controlled to preheat the spray water at a second power lower than the first power of high-temperature sterilization, avoiding the energy consumption impact caused by the high-temperature sterilization module starting directly at full power. Increasing the water temperature in advance can reduce the heating time of subsequent high-temperature sterilization, thus balancing sterilization efficiency and energy saving.

[0025] In one alternative implementation, after the dishwasher completes the main wash cycle, the following steps are also performed: Control the dishwasher to perform the rinsing stage; Control the operation of the high-temperature sterilization module to sterilize the spray water at high temperature; and / or control the operation of the ultraviolet sterilization module to sterilize the spray water with ultraviolet light.

[0026] Beneficial effects: High-temperature sterilization and / or ultraviolet sterilization are activated simultaneously during the rinsing stage. When the water flows through the sterilization module, it is instantly heated or irradiated with ultraviolet light, forming a high-temperature / ultraviolet sterilization water flow. This not only kills microorganisms in the rinsing water, but also dissolves residual oil stains on the tableware by using high temperature. Compared with traditional rinsing that only relies on water rinsing, it significantly improves the cleanliness and hygiene level of the tableware.

[0027] In one optional implementation, controlling the high-temperature sterilization module to sterilize the spray water at high temperature specifically includes the following steps: The high-temperature sterilization module is controlled to operate at the highest power, instantly heating the spray water to 55~70℃ and maintaining a constant temperature.

[0028] Beneficial effects: High-temperature sterilization ensures that the sterilization temperature meets the standard by instantaneously heating to 55~70℃ and maintaining a constant temperature, thereby improving the sterilization effect.

[0029] In one optional implementation, controlling the ultraviolet sterilization module to perform ultraviolet sterilization on the spray water specifically includes the following steps: Adjust the irradiation intensity or duty cycle of the ultraviolet sterilization module according to the flow rate of the spray water; If the dishwasher door is detected to be open during the ultraviolet sterilization process, the second ultraviolet lamp of the ultraviolet sterilization module will be turned off immediately. Get the sterilization time t2 of the UV sterilization module. When it is determined that t2 has reached the set sterilization time t0, control the UV sterilization module to turn off.

[0030] Beneficial effects: The UV sterilization adjusts the irradiation intensity or duty cycle according to the water flow rate. The faster the flow rate, the greater the irradiation intensity or duty cycle of the UV sterilization module, and the higher the light intensity of the UV sterilization module, thus ensuring the irradiation dose per unit volume of water. In addition, if the dishwasher door is detected to be open, the second UV lamp is immediately turned off, which can effectively prevent UV leakage and balance sterilization effect with safety of use.

[0031] In one alternative implementation, the following steps are also performed before the dishwasher begins the main wash phase: Control the dishwasher to perform the pre-rinse phase; The spray adjustment module is controlled to maintain its maximum opening so that the water outlets in each spray area are fully open.

[0032] Beneficial effects: During the pre-rinse stage, the spray adjustment module is fully open, and each water outlet rinses the surface dirt of the tableware with a large flow rate, quickly removing large particles of residue. This prevents the water outlets from being blocked by residue during the subsequent main wash stage, while also reducing the load pressure during the main wash stage and improving the overall cleaning efficiency. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of one embodiment of the dishwasher spray device in this invention. Figure 2 for Figure 1 Axonometric sectional view; Figure 3 This is a control principle diagram of an embodiment of the present invention; Figure 4 This is a flowchart illustrating the first embodiment of the dishwasher control method in this invention. Figure 5 This is a flowchart illustrating a second embodiment of the dishwasher control method in this invention. Figure 6 This is a flowchart illustrating the overall control logic of the dishwasher control method according to an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures: 1. Spray arm; 10. Water outlet; 11. Main body; 12. Assembly / disassembly section; 2. Main water inlet channel; 3. Branch water inlet channel; 4. Pressure detection module; 5. High-temperature sterilization module; 6. Second ultraviolet lamp. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Current dishwasher spray arms generally adopt an integrated structure design with a fixed nozzle outlet diameter, which has the following technical defects: First, the water pressure distribution is uneven. The cleaning force is insufficient in the far-end area due to the resistance along the flow, while the near-end area is prone to excessive rinsing, making it unable to adapt to the load changes caused by the density of tableware. Second, the water flow rate is not adjustable, and the fixed orifice diameter cannot adaptively balance according to water pressure fluctuations, which can easily cause local cleaning dead spots or waste of water resources. Third, the sterilization method relies on high-temperature heating of the whole machine, which is slow to heat up, energy-intensive, and lacks a targeted water flow sterilization mechanism. After long-term use, bacteria can easily grow inside the spray arm and form a biofilm. Fourth, the integrated structure makes disassembly and maintenance difficult and the cost of replacing parts is high.

[0041] To address the aforementioned issues, this application proposes a dishwasher spray device and control method that integrates adaptive flow regulation, dynamic sterilization, and modular design. Through zoned pressure detection, dynamic adjustment of water outlet openings, and multi-mode sterilization synergy, it achieves a comprehensive improvement in cleaning uniformity, sterilization efficiency, and operational reliability.

[0042] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0043] According to an embodiment of the present invention, in one aspect, combined with Figure 1 and Figure 2As shown, the present invention provides a dishwasher spray device, including: a spray arm 1, a main water inlet channel 2, multiple branch water inlet channels 3, a pressure detection module 4, a spray adjustment module 4, and a control module. The spray arm 1 is annular, and the spray arm 1 has a plurality of water outlet holes 10 along its circumference. The main water inlet channel 2 is located at the center of the spray arm 1 and is used to supply water to the spray arm 1. The branch water inlet channels 3 are connected between the spray arm 1 and the main water inlet channel 2, and the multiple branch water inlet channels 3 are arranged at intervals along the circumference of the spray arm 1, dividing the spray arm 1 into multiple independent spray areas. The pressure detection module 4, the main water inlet channel 2, the branch water inlet channels 3, the branch water inlet channels 4, the main water inlet channels 5, the branch water inlet channels 6, the main water inlet channels 7, the branch water inlet channels 8, the main water inlet channels 9, the branch water inlet channels 11, the branch water inlet channels 12, the branch water inlet channels 13, the main water inlet channels 14, the branch water inlet channels 15, the branch water inlet channels 16, the main water inlet channels 17, the branch water inlet channels 18, the branch water inlet channels 19, the main water inlet channels 12, the branch water inlet channels 13, the branch water inlet channels 14, the main water inlet channels 15, the branch water inlet channels 16, the branch water inlet channels 17, the main water inlet channels 18, the branch water inlet channels 19, the main water inlet channels 12, the branch water inlet channels 13, the branch water inlet channels 14, the branch water inlet channels 15, the branch water inlet channels 16, the branch water inlet channels 17, the branch water inlet channels 18, the branch water in The measuring module 4 is located at the intersection of the main water inlet channel 2 and the branch water inlet channel 3, or is located within the branch water inlet channel 3, and is used to detect the water pressure information of each branch water inlet channel 3; the spray adjustment module is located at the water outlet 10 or the branch water inlet channel 3, and is used to adjust the opening size of the water outlet 10 of each spray area; the control module is electrically connected to the pressure detection module 4 and the spray adjustment module respectively, and the control module is used to control the spray adjustment module to adjust the opening size of the water outlet 10 of each spray area according to the water pressure information detected by the pressure detection module 4. In the above embodiment, the spray arm 1 is divided into multiple independent spray areas through the partition design of the annular spray arm 1, the main water inlet channel 2, and the branch water inlet channel 3. By using the pressure detection module 4 installed in the branch water inlet channel 3 and the spray adjustment module installed at the water outlet 10, the control module can dynamically adjust the opening size of the corresponding water outlet 10 according to the water pressure information of each area, achieving an adaptive balance between water pressure and flow rate. The opening size of the water outlet 10 in each area automatically adjusts with changes in water pressure, achieving precise distribution of the zoned flow rate. This ensures stable water pressure and uniform spraying throughout the spray arm 1, resulting in consistent cleaning force in each area under different tableware loads, eliminating dead zones and over-rinsing, improving cleaning uniformity, and solving the problems of unadjustable flow rate and uneven pressure distribution in traditional spray arms 1.

[0044] Based on the above embodiments, as a further defined implementation, the water outlet 10 is disposed on the top wall of the spray arm 1, and multiple branch water inlet channels 3 are evenly spaced along the circumference of the spray arm 1, dividing the spray arm 1 into multiple uniform and independent spray areas. The main water inlet channel 2 has a communication port on its peripheral wall that connects to the branch water inlet channels 3, and the pressure detection module 4 is disposed at the communication port, or the pressure detection module 4 is disposed within the branch water inlet channels 3. Preferably, in this embodiment, the pressure detection module 4 is disposed within the branch water inlet channels 3. Through its zoned design, the spray arm 1 allows for independent adjustment of multiple sections, achieving comprehensive cleaning and sterilization of tableware.

[0045] In some embodiments, a plurality of water outlet holes 10 are evenly spaced along the length direction on the top wall of the branch water inlet channel 3.

[0046] In some embodiments, the pressure detection module 4 includes multiple pressure sensors, and the multiple pressure sensors are configured in a one-to-one correspondence with multiple branch water inlet channels 3. In the above embodiments, by setting multiple pressure sensors and corresponding them one-to-one with multiple branch water inlet channels 3, accurate collection of water pressure information for each spray area can be achieved. Compared with single-point pressure detection, zone pressure data can better reflect local load differences. For example, if the water pressure is too high due to dense tableware in a certain area, it can provide more accurate input for the action of the spray adjustment module and improve the response speed and accuracy of flow control.

[0047] Based on the above embodiments, as a further defined implementation, multiple pressure sensors are respectively installed in multiple branch water inlet channels 3.

[0048] In some embodiments, the spray arm 1 is provided with a plurality of partition ribs, and the plurality of partition ribs are provided in a one-to-one correspondence with a plurality of branch water inlet channels 3; the plurality of partition ribs divide the inner cavity of the spray arm 1 into a plurality of independent spray areas, and each spray area is connected to a branch water inlet channel 3.

[0049] In the above embodiment, the inner cavity of the spray arm 1 is divided into independent spray areas by partition ribs. Each area is connected to the corresponding branch water inlet channel 3, and physical isolation avoids water flow crosstalk. This ensures that the pressure detection module 4 collects water pressure information for a single area, and the action of the spray adjustment module only affects the flow rate of the corresponding area, further enhancing the independence of zone control. Furthermore, this design effectively ensures that the water flow is evenly distributed throughout the entire circumference of the spray arm 1, preventing water flow from concentrating on one side of the spray arm 1, which would lead to uneven water flow distribution and affect the cleaning effect of tableware.

[0050] Based on the above embodiments, as a further defined implementation, the number of partition ribs is consistent with the number of branch water inlet channels 3, and they are set in a one-to-one correspondence. The partition ribs are set inside the spray arm 1 and located on one side of the branch water inlet channel 3. One branch water inlet channel 3 supplies water to the spray arm 1 of one spray area.

[0051] In a specific example, there are four branch water inlet channels 3, four dividing ribs, and the spray arm 1 is divided into four uniform spray areas.

[0052] In some embodiments, the spray arm 1 includes a main body 11 and a disassembly / assembly part 12. The main body 11 is annular and is divided into multiple spray areas, each of which has an installation opening. The disassembly / assembly part 12 is arc-shaped and is detachably installed in the installation opening. The disassembly / assembly part 12 is provided with a water outlet 10. The spray adjustment module is detachably installed in the water outlet 10. There are multiple disassembly / assembly parts 12, and each of the multiple disassembly / assembly parts 12 is installed in a corresponding manner in a multiple installation opening.

[0053] In the above embodiment, the spray arm 1 adopts a split design of main body 11 + disassembly part 12. The disassembly part 12 can be detachably installed in the installation opening. The spray adjustment module is integrated in the water outlet 10 of the disassembly part 12. When it is necessary to maintain or replace the spray adjustment module, only the corresponding disassembly part 12 needs to be disassembled. There is no need to replace the entire spray arm 1. This makes it easy to disassemble and clean the inside of the spray arm 1 or replace the spray adjustment module, which greatly reduces maintenance costs and improves user experience.

[0054] Based on the above embodiments, as a further defined implementation, the main body 11 is provided with four mounting openings of the same size and shape evenly in the circumferential direction, and the disassembly and assembly parts 12 are four in number. The disassembly and assembly parts 12 are fixed to the main body 11 by screws or snap-fit. Preferably, the disassembly and assembly parts 12 are snap-fit ​​fixed to the main body 11.

[0055] Based on the above embodiments, as a further defined implementation, the spray adjustment module and the control module are electrically connected by flexible wires.

[0056] In some embodiments, the spray adjustment module includes a nozzle and a micro-adjusting valve. The nozzle is located at the water outlet 10 and has a nozzle outlet. The micro-adjusting valve is located at the nozzle outlet and is used to block or open at least part of the nozzle outlet. The spray adjustment module also includes a drive component. The nozzle is rotatably mounted in the water outlet 10. The drive component is connected to the nozzle and is adapted to drive the nozzle to rotate to adjust the spray direction.

[0057] In the above embodiments, the spray direction is adjusted by driving the nozzle to rotate via a drive component, and combined with a micro-adjusting valve to block or open the nozzle outlet, achieving dual adjustment of "orifice size + spray angle". For example, when the pressure in a certain area is too high, the orifice size can be increased and the spray angle adjusted to avoid densely packed tableware, further improving the uniformity of cleaning.

[0058] Specifically, the junction between the nozzle and the spray pipe wall employs a universal joint or ball joint structure. A micro-piezoelectric ceramic is used as the power source to drive a precise micro-regulating valve in reciprocating motion at the micrometer scale, thereby changing the nozzle outlet size. When the piezoelectric ceramic contracts, it pushes the valve core of the micro-regulating valve backward, exposing a larger annular nozzle outlet and increasing the orifice diameter. Conversely, the piezoelectric ceramic reverses its action, pushing the valve core of the micro-regulating valve forward, partially or completely blocking the nozzle outlet. This embodiment utilizes the inverse piezoelectric effect of piezoelectric materials to rapidly expand and contract the valve core at the micrometer level, directly changing the cross-sectional area of ​​the nozzle outlet. All nozzles are controlled by independent piezoelectric ceramic-driven valves and connected to the control module via flat cables or wireless modules.

[0059] As an alternative implementation, the spray adjustment module includes a micro-adjustment valve, which is disposed in the branch water inlet channel 3 and is used to adjust the opening of the branch water inlet channel 3, thereby adjusting the water pressure at the outlet hole 10; the outlet hole 10 is configured as a flexible outlet hole that can automatically contract or expand according to the water pressure.

[0060] In the above embodiment, the water outlet 10 is constructed as an adaptive flexible water outlet: when the water pressure is high, the water outlet 10 automatically expands; when the water pressure is low, the water outlet 10 automatically contracts. The opening size of the water outlet 10 can be adjusted by controlling the water pressure of each branch inlet channel 3 through a micro-regulating valve. The spray adjustment module uses a combination of adaptive mechanical and electronic control to adjust the opening size of the water outlet 10, making control simpler. The water outlet 10 can be made of an elastic material, such as a thin rubber sheet.

[0061] In this embodiment, when the dishwasher is performing the main wash stage, a large flow of water is required, so the water pressure is increased to allow the maximum opening of the water outlet 10. When the dishwasher is performing the rinsing / sterilization program, the opening of the orifice can be controlled to ensure the penetration of the jet. When the dishwasher is performing the low water volume energy-saving mode, the minimum opening of the orifice is controlled to enhance the jet force.

[0062] In some embodiments, the dishwasher spray device further includes an ultraviolet sterilization module; the ultraviolet sterilization module includes a first ultraviolet lamp disposed in the main water inlet channel 2, the first ultraviolet lamp being used to sterilize the water flowing through the main water inlet channel 2 with ultraviolet light; and / or, the ultraviolet sterilization module includes a second ultraviolet lamp 6 disposed on the outer wall of the spray arm 1, the second ultraviolet lamp 6 being used to sterilize the tableware inside the dishwasher with ultraviolet light.

[0063] In the above embodiment, the first ultraviolet lamp installed in the main water inlet channel 2 performs instant ultraviolet sterilization on the water flow, and the second ultraviolet lamp 6 on the outer wall of the spray arm 1 performs secondary ultraviolet irradiation on the surface of the tableware, forming a dual sterilization path of "water flow-tableware". Compared with a single sterilization method, the coverage is more comprehensive, especially for stubborn bacteria, which can achieve synergistic killing and greatly improve the sterilization effect of tableware.

[0064] Based on the above embodiments, as a further defined implementation, the first ultraviolet lamp is an LED bulb used for irradiating and disinfecting the water flow, and can also replace the high-temperature sterilization module 5 for disinfection. The second ultraviolet lamp 6 is a UV lamp, located on the outer wall of the spray arm 1, used for disinfecting bowls and chopsticks.

[0065] Preferably, the second ultraviolet lamp 6 has multiple lamps, which are evenly spaced along the circumference of the spray arm 1 to achieve a uniform disinfection and sterilization effect on the tableware.

[0066] In some embodiments, the dishwasher spray device further includes a high-temperature sterilization module 5, which is disposed in the main water inlet channel 2 and is used to sterilize the water flowing through the main water inlet channel 2 at high temperature.

[0067] In the above embodiments, the high-temperature sterilization module 5 installed in the water inlet channel can instantly heat the water flow, forming a high-temperature + ultraviolet composite sterilization mode combined with ultraviolet sterilization. By increasing the permeability of bacterial cell membranes through high temperature, ultraviolet light can penetrate more easily to achieve deep killing. The synergy of the two modes can significantly improve the sterilization effect and efficiency.

[0068] Based on the above embodiments, as a further defined implementation, the high-temperature sterilization module 5 includes a heating tube or a PTC heating element.

[0069] In some embodiments, the inner and outer walls of the spray arm 1, the main water inlet channel 2, and the branch water inlet channel 3 are all coated with an antibacterial coating.

[0070] In the above embodiments, by coating the inner and outer walls of the spray arm 1, the main water inlet channel 2, and the branch water inlet channel 3 with an antibacterial coating, the formation of biofilm can be inhibited, bacteria can be prevented from growing in the spray device between two washing cycles, and the interior of the spray arm 1 can be prevented from becoming a secondary source of pollution, thus achieving long-term protection of active antibacterial and passive sterilization.

[0071] Based on the above embodiments, as a further defined implementation method, the antibacterial coating is a nano-silver ion antibacterial coating or a titanium dioxide photocatalytic antibacterial coating to achieve long-lasting antibacterial effect.

[0072] This embodiment provides a dishwasher spray device capable of dynamic sterilization and flow regulation. The dishwasher spray device includes a spray arm 1, a main water inlet channel 2 and multiple branch water inlet channels 3, a high-temperature sterilization module 5, an ultraviolet sterilization module, a spray adjustment module, and a pressure detection module 4. The spray arm 1 has a hollow structure with internal water flow channels and the main water inlet channel 2 at the center. The overall structure adopts a modular segmented splicing structure for easy disassembly and maintenance. The high-temperature sterilization module 5 and the ultraviolet sterilization module are integrated inside the water flow channels. The high-temperature sterilization module 5 includes a miniature PTC heating element, and the ultraviolet sterilization module uses a UV-LED lamp module to achieve instantaneous heating of the water flow or ultraviolet irradiation sterilization. The spray adjustment module is located at the water outlet 10 of the spray arm 1 and uses flexible materials or a mechanical linkage structure to automatically adjust the size of the water outlet 10 according to changes in water pressure. The pressure detection module 4 includes a pressure sensor arranged at the water inlet of the branch water inlet channel 3. The pressure sensor collects water pressure signals in real time and adjusts the opening of the spray adjustment module through the control unit to achieve balanced flow control in different zones. The inner and outer walls of the spray arm 1 are coated with nano-silver ion or titanium dioxide photocatalytic antibacterial coatings to achieve long-lasting antibacterial effect. The high-temperature sterilization module 5 and the ultraviolet sterilization module can work independently or in combination. The PTC heating element instantly heats the water flow, and UV-LED lamp beads are arranged along the inner wall of the water flow channel. LED lights are installed inside the PTC tube, and the outside is ensured to be fully irradiated by the water flow. A second ultraviolet lamp 6 is installed on the outer wall of the spray arm 1. Preferably, the second ultraviolet lamp 6 is a UV lamp, and one UV lamp is installed in each of the four spray areas. The spray adjustment module automatically expands when the water pressure increases to increase the water output; it automatically contracts when the water pressure decreases to maintain the spray pressure and achieve dynamic balance. The pressure detection module 4 can realize independent flow adjustment in multiple sections to ensure that the water output intensity is consistent on the inner, outer, and far ends of the spray arm 1.

[0073] During the cleaning process, water flows from the central main water inlet channel 2 through various branch water inlet channels 3 into the water flow channel inside the spray arm 1. The pressure sensor collects the water pressure in real time. When the water pressure is too high, the micro-regulating valve increases its opening, the water outlet 10 becomes larger, and the pressure is reduced. When the water pressure is too low, the micro-regulating valve decreases its opening, the water outlet 10 becomes smaller, and the spray force is increased. When the water flows through the sterilization module, it is instantly heated or irradiated with ultraviolet light, forming a high-temperature / ultraviolet sterilization water flow. The water flow is sprayed out from the water outlet 10, which cleans and sterilizes the tableware in all directions. This achieves adaptive balance of water pressure, instantaneous high-temperature / ultraviolet sterilization, precise distribution of zoned flow, modular design for easy maintenance, and improves cleaning uniformity, sterilization efficiency, and reliability.

[0074] Secondly, the present invention also provides a dishwasher, including an inner tub and a dishwasher spray device of any of the above embodiments installed at the bottom of the inner tub.

[0075] By integrating the spray device into the bottom of the dishwasher's inner tub, the existing water and electrical interfaces of the dishwasher can be used directly to upgrade the cleaning performance without significantly altering the overall structure. Users can select different washing modes, such as pre-rinse, main wash, and rinse, through the existing operating interface and enjoy the enhanced experience brought by zoned flow control and dynamic sterilization.

[0076] The dishwasher provided in this embodiment has a spray device whose entire structure is embedded in the bottom of the dishwasher's inner tub. The entire structure can be disassembled and installed. The disassembly part 12 is a quarter-circle structure with a spray adjustment module on it, forming a dynamic aperture adjustment module. The spray adjustment module controls the water flow direction according to the feedback water pressure. When the nozzle sprays, there are no dishes or chopsticks blocking the flow, so the water pressure is relatively low. When the spray hits the items being cleaned, the water flow generates pressure. The pressure detection module 4 can detect the force state and adjust the water flow distribution by adjusting the spray adjustment module.

[0077] The dishwasher spray device provided in this embodiment has the following advantages: 1. Adaptive flow regulation: The diameter of the water outlet automatically changes with the water pressure. Combined with the electronically controlled micro regulating valve, it achieves uniform cleaning force throughout the entire area, without dead corners or over-flushing. 2. Instantaneous dynamic sterilization: The water flow is directly heated or irradiated with ultraviolet light in the channel, resulting in more direct and efficient sterilization with lower energy consumption. 3. Modular and detachable: The segmented disassembly section 12 design facilitates disassembly, cleaning, and replacement of parts, reducing maintenance costs. 4. Long-lasting antibacterial protection: The nano antibacterial coating inhibits biofilm formation and keeps the inside of the spray arm 1 clean and hygienic. 5. Intelligent safety protection: Multiple protection mechanisms, including power-off when there is no water, power-off when overheating, and shutdown when the door is opened, making it safer to use.

[0078] Thirdly, the present invention also provides a control method applicable to the above-mentioned dishwasher, combined with Figure 3 As shown, the control method includes the following steps: Step S101: Control the dishwasher to perform the main wash phase; Step S102: Obtain water pressure information for each branch water inlet channel 3 of the dishwasher spray device; Step S103: When it is determined that the pressure of the branch water inlet channel 3 is greater than the first set pressure threshold, the spray adjustment module is controlled to increase the opening size of the water outlet 10 in the corresponding spray area. Step S104: When it is determined that the pressure of the branch water inlet channel 3 is less than the second set pressure threshold, the spray adjustment module is controlled to reduce the opening size of the water outlet 10 in the corresponding spray area.

[0079] In the above embodiment, during the main wash phase of the dishwasher, a closed-loop control system of "main wash phase - pressure acquisition - threshold judgment - water outlet 10 opening size adjustment" ensures constant water pressure in each area and enables independent flow adjustment in multiple sections, ensuring consistent water intensity on the inner, outer, and far sides of the spray arm 1. Specifically, water flows from the central main inlet channel 2 into each branch inlet channel 3. The pressure detection module 4 of the branch inlet channel 3 collects water pressure in real time. When the water pressure in one or more branch inlet channels 3 is detected to be too high, the spray adjustment module is controlled to increase the opening, thereby increasing the opening of the water outlet 10 in the corresponding spray area and reducing the pressure. When the water pressure in one or more branch inlet channels 3 is detected to be too low, the spray adjustment module is controlled to decrease the opening, thereby decreasing the opening of the water outlet 10 in the corresponding spray area and increasing the spray force to perform all-round cleaning and sterilization of the tableware. Through the above design, balanced flow control in different zones is achieved, ultimately resulting in uniform cleaning, efficient sterilization, energy and water saving, and stable and reliable cleaning effects.

[0080] This embodiment proposes an innovative logic for the dynamic aperture adjustment of the dishwasher's spray arms and the linkage control of water flow pressure. The pressure sensors of the four modules control the spray adjustment modules in four directions respectively. Due to the different placement of tableware, some areas have fewer tableware, so the water output can be appropriately reduced, while other areas have more tableware, so the water output needs to be increased to ensure that the water flow of the four modules is evenly rinsed. This can realize independent flow adjustment in multiple sections, and has a synergistic effect in improving the accuracy of water flow control and energy saving, making it more practical.

[0081] In some embodiments, the first set pressure threshold p1 = target water pressure - Δp, and the second set pressure threshold p2 = target water pressure + Δp; preferably, Δp = 10% of the target water pressure. The control method further includes: Step S105: When it is determined that the pressure of the branch water inlet channel 3 is between the first set pressure threshold and the second set pressure threshold, the opening size of the water outlet 10 of the corresponding spray area is kept unchanged.

[0082] In the above embodiment, when the pressure of the branch water inlet channel 3 is detected to be between the first set pressure threshold p1 and the second set pressure threshold p2, the spray adjustment module is controlled to maintain the current valve position so that the opening size of the water outlet 10 remains unchanged, maintaining stable spraying and avoiding system oscillation caused by frequent adjustment. This ensures the accuracy of pressure control and extends the service life of the spray adjustment module.

[0083] In this embodiment, combined with Figure 6As shown, the pressure sensor collects the water pressure P in real time at the branch water inlet channel 3 of the spray arm 1. The control module refreshes the water pressure value every 20-100ms. The target water pressure P_target is preset by the program / automatically matched in stages. If P>P_target +ΔP, it can be determined that the water pressure is too high. In this case, the micro regulating valve is controlled to increase its opening to divert and reduce the pressure, while the opening size of the water outlet 10 is increased to increase the water outlet area. If P... <P_target If ΔP is low, the micro regulating valve is controlled to reduce its opening, thereby reducing the size of the outlet hole 10, increasing the spray pressure, and maintaining the jet intensity. If P is within the target range, the current valve position is maintained to ensure stable spraying. Through the above design, the water pressure remains constant regardless of the number of dishes or the rotation speed of the spray arm 1. In some embodiments, the high-temperature sterilization module 5 of the dishwasher spray device is set to a first power when performing high-temperature sterilization. During the main wash cycle, or within a set time period before the end of the main wash cycle, the dishwasher also performs the following steps: Step S201: Control the high-temperature sterilization module 5 of the dishwasher spray device to start and operate at the second power to preheat the spray water; The second power is less than the first power.

[0084] In the above embodiments, during or before the main wash stage, the high-temperature sterilization module 5 is controlled to preheat the spray water at a second power lower than the first power of high-temperature sterilization, so as to avoid the energy consumption impact caused by the high-temperature sterilization module 5 starting directly at full power. Increasing the water temperature in advance can reduce the heating time of subsequent high-temperature sterilization, thus balancing sterilization efficiency and energy saving.

[0085] In some embodiments, combined with Figure 4 As shown, after the dishwasher completes the main wash cycle, the following steps are performed: Step S301: Control the dishwasher to perform the rinsing stage; Step S302: Control the high-temperature sterilization module 5 to operate and perform high-temperature sterilization on the spray water; and / or, control the ultraviolet sterilization module to operate and perform ultraviolet sterilization on the spray water.

[0086] In the above embodiments, high-temperature sterilization and / or ultraviolet sterilization are simultaneously activated during the rinsing stage. When the water flows through the sterilization module, it is instantly heated or irradiated with ultraviolet light, forming a high-temperature / ultraviolet sterilization water flow. This not only kills microorganisms in the rinsing water, but also dissolves residual oil stains on the tableware by using high temperature. Compared with traditional rinsing that only relies on water rinsing, this significantly improves the cleanliness and hygiene level of the tableware.

[0087] In some embodiments, controlling the high-temperature sterilization module 5 to sterilize the spray water at high temperature includes the following steps: Step S401: Control the high-temperature sterilization module 5 to work at the first power to instantly heat the spray water to 55~70℃ and maintain a constant temperature.

[0088] Step S402: Obtain the sterilization time t1 of the high-temperature sterilization module 5. When it is determined that t1 has reached the set sterilization time t0, control the high-temperature sterilization module 5 to shut down.

[0089] In the above embodiments, high-temperature sterilization ensures that the sterilization temperature meets the standard by instantaneously heating to 55~70℃ and maintaining a constant temperature, thereby improving the sterilization effect.

[0090] In some embodiments, combined with Figure 5 As shown, controlling the ultraviolet sterilization module to sterilize the spray water with ultraviolet light includes the following steps: Step S501: Adjust the irradiation intensity or duty cycle of the ultraviolet sterilization module according to the flow rate of the spray water; Step S502: If the dishwasher door is detected to be open during the ultraviolet sterilization process, the second ultraviolet lamp of the ultraviolet sterilization module shall be turned off immediately. Step S503: Obtain the sterilization time t2 of the ultraviolet sterilization module. When it is determined that t2 has reached the set sterilization time t0, control the ultraviolet sterilization module to turn off.

[0091] In the above embodiments, the ultraviolet sterilization adjusts the irradiation intensity or duty cycle according to the water flow rate. The faster the flow rate, the greater the irradiation intensity or duty cycle of the ultraviolet sterilization module, and the higher the light intensity of the ultraviolet sterilization module, thereby ensuring the irradiation dose per unit volume of water. In addition, if the dishwasher door is detected to be open, the second ultraviolet lamp is immediately turned off, which can effectively prevent ultraviolet leakage and balance sterilization effect and safety of use.

[0092] The dishwasher provided in this embodiment adopts dynamic sterilization module control logic, and the dishwasher has high-temperature sterilization mode, ultraviolet sterilization mode, and dual-mode coordination.

[0093] High-temperature sterilization mode: The high-temperature sterilization module 5 is activated at the end of the main wash and during the rinsing stage to instantly heat the water flow; or when the inlet water temperature is detected to be less than 45°C, the high-temperature sterilization module 5 is activated to heat the water flow. When the target temperature of 55-70°C is reached, the heating power of the high-temperature sterilization module 5 is reduced to maintain a constant temperature. When the water flow is detected to stop, the high-temperature sterilization module 5 is immediately shut off to prevent dry burning.

[0094] UV sterilization mode: The UV sterilization module sterilizes the spray water or disinfects tableware. The UV sterilization module is activated only when water is flowing and is not activated when there is no water. When the water flow speed is detected to be greater than the set threshold, the brightness / duty cycle of the UV sterilization module is increased. During the rinsing stage, the UV sterilization module irradiates the entire process, and the sterilization time is not less than 3 minutes to be considered effective sterilization. If the door is detected to be open, the second UV lamp of the UV sterilization module is immediately turned off to prevent UV leakage. Dual-mode synergy: A composite mode combining high-temperature sterilization and ultraviolet sterilization (heating + ultraviolet lamp irradiation). High temperature improves sterilization efficiency, ultraviolet lamp irradiation achieves photocatalytic sterilization without dead angles, and at the same time, it works in conjunction with a nano antibacterial coating to inhibit bacteria.

[0095] In some embodiments, the following steps are also performed before the dishwasher begins the main wash phase: Step S601: Control the dishwasher to perform the pre-rinse stage; Step S602: Control the spray adjustment module to maintain the maximum opening so that the water outlet 10 of each spray area is fully open.

[0096] In the above embodiment, during the pre-rinse stage, the spray adjustment module is fully opened, and each water outlet 10 rinses the surface dirt of the tableware with a large flow rate, quickly removing large particles of residue, avoiding the blockage of the water outlet 10 by residue in the subsequent main wash stage, while reducing the load pressure in the main wash stage and improving the overall cleaning efficiency.

[0097] Combination Figure 6 As shown, the control flow of the dishwasher provided in this embodiment is as follows: self-check → determine washing stage → pre-rinse (high flow rate, sterilization off) → main wash (pressure regulation, optional preheating) → rinse (sterilization on, pressure regulation and flow control) → enhanced sterilization (high temperature + UV, timed maintenance) → program end → shutdown and reset. Water pressure signals are collected in real time by a pressure sensor, and after calculation by the control module, a micro-regulating valve is driven to achieve an adaptive balance between water pressure and flow rate. Simultaneously, the start / stop and power of the high-temperature sterilization module 5 or the ultraviolet sterilization module are intelligently controlled according to the washing stage, providing instant heating or ultraviolet sterilization of the water flow. Combined with a nano-antibacterial coating, this achieves full-process antibacterial protection, enabling the dishwasher to have functions such as zoned flow rate regulation, waterless protection, over-temperature protection, and fault self-diagnosis, ultimately achieving uniform cleaning, efficient sterilization, energy and water saving, and stable and reliable control effects.

[0098] The core control logic of the dishwasher control method provided in this embodiment is: combined with Figure 1 , Figure 2 and Figure 6As shown, the power-on program initializes and checks for any abnormalities in the machine. The nozzles spray, initially determining the approximate location of the dishes and utensils, adjusting the nozzle direction to wash the corresponding area. A pressure sensor collects water pressure, and a target water pressure (P_target) is matched based on the target amount of dishes. During the pre-rinse stage, the position of the tableware is determined first to ensure consistent water spray intensity from all directions. During the main wash stage, due to water pressure fluctuations during the washing process, the water intensity may differ from the set value. Adjustments are made based on the real-time collected water pressure and the target water pressure, controlling the water pressure within 10% of the target pressure to ensure uniform and constant water pressure sprayed onto the dishes. At the end of the main wash stage, the high-temperature sterilization module 5 activates a low-temperature preheating hot water flow. The rinsing stage primarily activates the sterilization mode, starting the high-temperature sterilization module 5 and / or the ultraviolet sterilization module. A temperature sensor controls the target water temperature between 55 and 70 degrees Celsius. At this time, the diameter of the water outlet 10 also adaptively adjusts according to the water pressure. This stage mainly softens dirt and evenly sprays sterilizing agents. In the enhanced sterilization stage, the high-temperature sterilization module 5 and the second ultraviolet lamp 6 on the spray arm 1 are activated for all-around sterilization. Simultaneously, the diameter of the water outlet 10 is reduced. Since most of the dirt has been completely removed after the previous rinsing, the high-temperature rinse precisely washes the dishes again, and the second ultraviolet lamp 6 provides comprehensive, no-dead-angle irradiation. After washing, the high-temperature sterilization module 5 and the ultraviolet sterilization module are turned off, the micro-regulating valve resets, the water outlet 10 returns to its initial state, drainage is completed, and drying is finished.

[0099] The dishwasher provided in this embodiment enters four stages according to the washing program: pre-rinse, main wash, rinse, and enhanced sterilization. The pressure sensor collects the water pressure in real time, compares it with the target value, and controls the micro-regulating valve to achieve stable pressure output. The main wash stage can be turned on with low-temperature preheating, and the rinsing and enhanced sterilization stages can be turned on with high-temperature sterilization and ultraviolet sterilization. When the water flows through the sterilization module, it is instantly heated or irradiated with ultraviolet light to form a high-temperature / ultraviolet sterilization water flow. The system is equipped with parallel protection against water shortage, over-temperature, over-pressure, and door interruption. It will stop immediately in case of abnormality. Water flows from the main inlet channel 2 into the branch inlet channel 3. The pressure sensor collects the water pressure in real time. When the water pressure is too high, the micro-regulating valve increases the opening and the outlet hole 10 increases the opening to reduce the pressure. When the water pressure is too low, the micro-regulating valve decreases the opening and the outlet hole 10 decreases the opening to increase the spray force, ensuring stable water pressure and uniform spraying throughout the spray arm 1. The high-temperature sterilization module 5 and the ultraviolet sterilization module achieve real-time high-temperature / UV sterilization of the water flow. The system automatically switches modes according to the load, degree of dirt, and stage, saving energy and water, extending the life of the high-temperature sterilization module 5 and the ultraviolet sterilization module, and providing fault self-diagnosis and safety protection. After the system starts, it enters an initialization self-test to determine the status of the hatch, water flow, and sensors.

[0100] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the protection scope of the embodiments of this application.

Claims

1. A dishwasher spray device, characterized in that, include: The spray arm (1) is ring-shaped, and the spray arm (1) is provided with a plurality of water outlet holes (10) along the circumference. The main water inlet channel (2) is located at the center of the spray arm (1) and is used to supply water to the spray arm (1); Multiple branch water inlet channels (3) are connected between the spray arm (1) and the main water inlet channel (2), and the multiple branch water inlet channels (3) are arranged at intervals along the circumference of the spray arm (1), dividing the spray arm (1) into multiple independent spray areas; The pressure detection module (4) is located at the intersection of the main water inlet channel (2) and the branch water inlet channel (3), or is located in the branch water inlet channel (3), and is used to detect the water pressure information of each branch water inlet channel (3); A spray adjustment module is provided at the water outlet (10) or the branch water inlet channel (3) to adjust the opening size of the water outlet (10) of each spray area; The control module is electrically connected to the pressure detection module (4) and the spray adjustment module respectively. The control module is used to control the spray adjustment module to adjust the opening size of the water outlet (10) of each spray area according to the water pressure information detected by the pressure detection module (4).

2. The dishwasher spray device according to claim 1, characterized in that, The pressure detection module (4) includes multiple pressure sensors, and the multiple pressure sensors are set one-to-one with the multiple branch water inlet channels (3).

3. The dishwasher spray device according to claim 1, characterized in that, The spray arm (1) is provided with multiple partition ribs, and the multiple partition ribs are provided one-to-one with multiple branch water inlet channels (3); Multiple partition ribs divide the inner cavity of the spray arm (1) into multiple independent spray areas, and each spray area is connected to a branch water inlet channel (3).

4. The dishwasher spray device according to any one of claims 1 to 3, characterized in that, The spray arm (1) includes: The main body (11) is circular and is divided into multiple spray areas, and each spray area is provided with an installation opening; The disassembly part (12) is arc-shaped and can be detachably installed in the installation opening. The disassembly part (12) is provided with the water outlet (10). The spray adjustment module is detachably installed in the water outlet (10), and there are multiple disassembly and assembly parts (12), which are installed in multiple installation openings one by one.

5. The dishwasher spray device according to any one of claims 1 to 3, characterized in that, The spray adjustment module includes: The nozzle is located at the water outlet (10); A miniature regulating valve is provided at the nozzle outlet for blocking or opening at least a portion of the nozzle outlet. A driving component is provided, wherein the nozzle is rotatably mounted in the water outlet (10), the driving component is connected to the nozzle, and is adapted to drive the nozzle to rotate in order to adjust the spray direction.

6. The dishwasher spray device according to any one of claims 1 to 3, characterized in that, The spray adjustment module includes: A micro regulating valve is provided in the branch water inlet channel (3) to adjust the opening of the branch water inlet channel (3) and thereby adjust the water pressure at the outlet (10); The water outlet (10) is configured as a flexible water outlet that can automatically contract or expand according to the water pressure.

7. The dishwasher spray device according to any one of claims 1 to 3, characterized in that, The dishwasher spray device also includes an ultraviolet sterilization module; The ultraviolet sterilization module includes a first ultraviolet lamp disposed in the main water inlet channel (2), which is used to sterilize the water flowing through the main water inlet channel (2) with ultraviolet light. And / or, The ultraviolet sterilization module includes a second ultraviolet lamp (6) disposed on the outer wall of the spray arm (1), the second ultraviolet lamp (6) being used to sterilize the tableware inside the dishwasher with ultraviolet light; And / or, the dishwasher spray device further includes: The high-temperature sterilization module (5) is installed in the main water inlet channel (2) and is used to sterilize the water flowing through the main water inlet channel (2) at high temperature.

8. The dishwasher spray device according to any one of claims 1 to 3, characterized in that, The inner and outer walls of the spray arm (1), the main water inlet channel (2), and the branch water inlet channel (3) are all coated with an antibacterial coating.

9. A dishwasher, characterized in that, The dishwasher includes an inner liner and a spray device according to any one of claims 1 to 8 installed at the bottom of the inner liner.

10. A control method applicable to the dishwasher according to claim 9, characterized in that, The control method includes: Control the dishwasher to perform the main wash cycle; Obtain water pressure information for each branch water inlet channel (3) of the dishwasher spray device; When it is determined that the pressure of the branch water inlet channel (3) is greater than the first set pressure threshold, the spray adjustment module is controlled to increase the opening size of the water outlet (10) of the corresponding spray area; When it is determined that the pressure of the branch water inlet channel (3) is less than the second set pressure threshold, the spray adjustment module is controlled to reduce the opening size of the outlet hole (10) of the corresponding spray area.

11. The control method for a dishwasher according to claim 10, characterized in that, The first set pressure threshold p1 = target water pressure - Δp, the second set pressure threshold p2 = target water pressure + Δp, Δp = 10% of target water pressure; The control method further includes: When it is determined that the pressure of the branch water inlet channel (3) is between the first set pressure threshold and the second set pressure threshold, the opening size of the water outlet (10) of the corresponding spray area is kept unchanged.

12. The control method for a dishwasher according to claim 10, characterized in that, The working power of the high-temperature sterilization module (5) of the dishwasher spray device is set to the first power when performing high-temperature sterilization. During the main wash cycle, or within a set time period before the end of the main wash cycle, the dishwasher also performs the following steps: The high-temperature sterilization module (5) of the dishwasher spray device is started and operates at the second power to preheat the spray water; The second power is less than the first power.

13. The control method for a dishwasher according to any one of claims 10 to 12, characterized in that, After the dishwasher completes its main wash cycle, the following steps are performed: Control the dishwasher to perform the rinsing stage; Control the operation of the high-temperature sterilization module (5) to sterilize the spray water at high temperature; and / or control the operation of the ultraviolet sterilization module to sterilize the spray water with ultraviolet light.

14. The control method for a dishwasher according to claim 13, characterized in that, The operation of the high-temperature sterilization module (5) to sterilize the spray water at high temperature includes the following steps: The high-temperature sterilization module (5) is controlled to operate at the first power to instantly heat the spray water to 55~70℃ and maintain a constant temperature; And / or, the operation of the ultraviolet sterilization module to sterilize the spray water with ultraviolet light specifically includes the following steps: Adjust the irradiation intensity or duty cycle of the ultraviolet sterilization module according to the flow rate of the spray water; If the dishwasher door is detected to be open during the ultraviolet sterilization process, the second ultraviolet lamp of the ultraviolet sterilization module will be turned off immediately. Get the sterilization time t2 of the UV sterilization module. When it is determined that t2 has reached the set sterilization time t0, control the UV sterilization module to turn off.

15. The control method for a dishwasher according to any one of claims 10 to 12, characterized in that, Before the dishwasher begins its main wash cycle, perform the following steps: Control the dishwasher to perform the pre-rinse phase; The spray adjustment module is controlled to maintain its maximum opening so that the water outlets (10) of each spray area are fully open.

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