A cleaning method of a cleaning machine and a cleaning machine

Abstract

The present application relates to a cleaning method of a cleaning machine, after the cleaning machine starts the cleaning work, water is first supplied to the cleaning cavity to perform water flow flushing work, then the turbidity value D of the cleaning water in the cleaning cavity is detected and obtained, the corresponding steam supply time T is determined according to the turbidity value D; according to the determined steam supply time T, steam is supplied to the cleaning cavity to swell the pollutants in the cleaning cavity; after the steam supply is completed, the swelled pollutants in the cleaning cavity are flushed by water flow. The cleaning method can reduce the adhesion ability of the pollutants, and has good cleaning effect. The present application also relates to a cleaning machine applying the cleaning method, which comprises a box body, a spraying arm and an impeller assembly arranged in the box body, a motor arranged at the bottom of the box body, a water pump connected with the water outlet of the box body, a steam generator connected with the water pump, a top wall of the spraying arm is provided with a top plate to form a cavity, and a nozzle is arranged on the top plate corresponding to the water spraying hole; a channel is arranged in the motor shaft and connected with the cavity, and the steam generator is connected with the channel.

Description

TECHNICAL FIELD

[0001] The present application relates to a cleaning method of a cleaning machine, and to a cleaning machine using the cleaning method. BACKGROUND

[0002] With the increasing improvement of people's living standards, dishwashers as a kind of kitchen household appliances are increasingly entering families. The dishwashers on the market are generally divided into three types: table type, cabinet type and tank type. The table type dishwasher is a whole independent structure, which is generally placed on the table for use; the cabinet type dishwasher is also an independent structure, but needs to be embedded in the kitchen cabinet for use; the tank type dishwasher is combined with the sink, which is generally installed in the kitchen cabinet for use. The above-mentioned various forms of dishwashers generally raise and spray water to the dishes in the cleaning space through the action of the motor and the impeller to achieve the cleaning effect.

[0003] For example, the Chinese utility model patent "A cleaning machine" with the authorization announcement number CN209564095U (application number 201821329540.4) discloses a cleaning machine including a sink body, a spray arm, a motor, a motor shaft, a centrifugal impeller, a water supply mechanism, and a flow guide. The centrifugal impeller is arranged in the spray arm and connected to the upper end of the motor shaft. The motor shaft penetrates up and down and is connected to the water supply mechanism at the lower end. The flow guide is arranged below the spray arm and connected to the water inlet. A plurality of flow guide holes are arranged on the outer circumferential wall of the lower part of the flow guide. In use, the water inlet is closed first, and a small amount of water is input into the centrifugal impeller through the motor shaft to immerse the centrifugal impeller. After the centrifugal impeller is started, the water supply of the motor shaft is stopped. The water flow continuously enters the flow guide under the action of negative pressure and drives the valve plate assembly to open the water inlet, realizing continuous water supply. The rotation of the motor can realize the rotation of the spray arm, thereby realizing the cleaning of the articles in the sink body. However, when using the cleaning machine with this structure for cleaning, in order to ensure good cleaning effect, heating cleaning is usually adopted. However, it takes a long time to heat the water in the sink body to the set temperature, and the heating time is further prolonged and the heating power consumption is increased during the heating process due to heat dissipation. In addition, after heating is completed, the temperature of the hot water will quickly decrease during the cleaning process due to heat exchange with the articles to be cleaned, and the cleaning effect is limited. SUMMARY

[0004] The first technical problem to be solved by the present application is to provide a cleaning method of a cleaning machine that reduces the adhesion strength of dirt and improves the cleaning effect.

[0005] The second technical problem to be solved by the present application is to provide a cleaning method of a cleaning machine that has high heat exchange efficiency and can effectively reduce the cleaning time during the cleaning process.

[0006] The third technical problem to be solved by the present application is to provide a cleaning machine using the cleaning method.

[0007] The technical solution adopted by the present application to solve the first technical problem is a cleaning method of a cleaning machine, characterized in that: after the cleaning machine starts the cleaning work, water is first supplied to the cleaning cavity to perform water flow flushing work, then the turbidity value D of the cleaning water in the cleaning cavity is detected and obtained, the corresponding steam supply time T is determined according to the turbidity value D, steam is supplied to the cleaning cavity according to the determined steam supply time T to perform swelling treatment on the pollutants in the cleaning cavity, and after the steam supply is completed, the swelled pollutants in the cleaning cavity are flushed by water flow.

[0008] The set steam supply time corresponding to different turbidity intervals is preset, and the set steam supply time corresponding to the turbidity interval in which the turbidity value is located is determined as the steam supply time according to the turbidity value;

[0009] Or a turbidity value-steam supply time relationship curve is preset, and the steam supply time corresponding to the turbidity value is determined according to the turbidity value and the turbidity value-steam supply time relationship curve.

[0010] In order to more accurately determine the steam supply time according to the influence of different pollutant properties on the motor power, and thus achieve better swelling effect of the pollutants and avoid the situation that the swelling of the pollutants is insufficient and the steam supply time process reduces the cooking effect of the pollutants, the cleaning machine drives the spray arm in the cleaning cavity to rotate to perform spray cleaning work through the driving effect of the motor.

[0011] On the basis of obtaining the turbidity value, the steam supply time T is comprehensively determined in combination with the power change of the motor.

[0012] In order to avoid the influence of large pollutants on the determination of the steam supply time, if the motor power fluctuation exceeds the set fluctuation threshold, it is judged that there are large pollutants, and then the pollutants are flushed by water flow and drainage work is performed; after the drainage is completed, the water flow flushing and turbidity detection work are performed again.

[0013] As an improvement, the best steam supply time corresponding to the best swelling effect of the oil-based pollutants is T1, the best steam supply time corresponding to the best swelling effect of the protein-based pollutants is T2, and the best steam supply time corresponding to the best swelling effect of the starch-based pollutants is T3, wherein T1

[0014] Case 1, when D≤D1; if the motor power remains stable, the steam supply time T is determined as: T=(T3-T1)D / D1+T1; if the motor power decreases, the steam supply time T is determined as: T=(T2-T1)D / D1+T1;

[0015] Case 2, when D1 < D ≤ D2; if the motor power remains stable, the corresponding determination of the steam into time T is: T = (T3-T1)D / (D2-D1) + (4T1-T3) / 3; if the motor power decreases, the corresponding determination of the steam into time T is: T = (T2-T1)D / (D2-D1) + (4T1-T2) / 3;

[0016] Case 3, when D > D2; if the motor power remains stable, the corresponding determination of the steam into time T = T3; if the motor power decreases, the corresponding determination of the steam into time T = T2.

[0017] The technical scheme adopted by the present application to solve the second technical problem is: a cleaning method of a cleaning machine, characterized in that: the cleaning machine drives the spray arm in the cleaning cavity to rotate for spray cleaning work through the driving action of the electric machine.

[0018] After the cleaning machine starts the cleaning work, high-temperature steam is introduced into the water spray hole position of the spray arm, so that the water sprayed into the cleaning cavity is cavitation water reaching the target temperature.

[0019] Preferably, the air volume of the high-temperature steam and the water inflow of the spray arm are controlled, so that the water sprayed into the cleaning cavity reaches the target temperature.

[0020] In order to achieve constant temperature cleaning without setting a heating disc and avoid the scale problem caused by the heating disc, a cleaning method of a cleaning machine, characterized in that: the cleaning machine drives the spray arm in the cleaning cavity to rotate for spray cleaning work through the driving action of the electric machine.

[0021] After the cleaning machine starts the cleaning work, air is introduced into the water spray hole position of the spray arm to form cavitation water; the water temperature in the cleaning cavity is detected in real time, steam is introduced into the water spray hole position of the spray arm to heat the water sprayed by the spray arm, and the introduction of steam is controlled to stop until the water temperature in the cleaning cavity reaches the target temperature value.

[0022] Preferably, a cleaning method of a cleaning machine, characterized in that: the cleaning process of the cleaning machine includes a pre-cleaning stage, a main cleaning stage and a rinsing stage in sequence.

[0023] The aforementioned cleaning method using steam to swell pollutants is used in the cleaning work in the pre-cleaning stage, and the cleaning work in the main cleaning stage is carried out after the drainage in the pre-cleaning stage is completed.

[0024] In the cleaning work in the main cleaning stage, the aforementioned cleaning method of the cleaning machine is used, in which high-temperature steam is introduced to form cavitation water reaching the target temperature, the air volume of the high-temperature steam and the water inflow of the spray arm are controlled to control the water sprayed into the cleaning cavity to reach the target temperature, and / or air is introduced to form cavitation water and steam is introduced to heat the water sprayed by the spray arm.

[0025] Preferably, in the cleaning process of the main cleaning stage, the cleaning method of controlling the air inlet amount of high-temperature steam on the basis of the aforementioned air inlet of high-temperature steam to form cavitated water at a target temperature or the air inlet of high-temperature steam to form cavitated water at a target temperature, when the water temperature in the cleaning cavity reaches the set temperature Ts, the cleaning method of air inlet to form cavitated water and steam inlet to heat the water sprayed by the spray arm is adopted; wherein Ts < Tm, Tm is the target temperature of the current main cleaning stage.

[0026] The technical solution adopted by the present application to solve the third technical problem is: a cleaning machine applying the cleaning method of any of the preceding, comprising

[0027] The box has a cleaning cavity, and a drain port is formed in the bottom wall of the box;

[0028] The spray arm is provided in the box, and the spray arm has a flow channel inside, a water inlet port and a water outlet hole are formed in the wall of the spray arm and are connected with the flow channel;

[0029] The impeller assembly is rotatably arranged below the spray arm and is used for pumping the water at the bottom of the box into the spray arm through the water inlet port;

[0030] The motor is arranged at the bottom of the box, and the motor shaft penetrates through the bottom wall of the box and is connected with the impeller assembly;

[0031] characterized in that it further comprises

[0032] The water pump is connected with the drain port through the water inlet pipe;

[0033] The steam generator is connected with the water pump through the connecting pipe;

[0034] The top wall of the spray arm is provided with a top plate to jointly enclose a cavity with the top wall of the spray arm, the water outlet hole is located in the cavity, and a nozzle is formed in the top plate corresponding to the water outlet hole; the motor shaft is hollow to form a channel penetrating through the top and bottom, the upper end of the channel is connected with the cavity, and the steam outlet of the steam generator is connected with the lower end of the channel through the steam pipe.

[0035] In order to more accurately obtain the turbidity of the pollutants in the cleaning cavity, a turbidity sensor is arranged at the bottom of the box.

[0036] Preferably, the turbidity sensor is arranged at a position close to the drain port in the box.

[0037] In order to facilitate the acquisition of water temperature data in the cleaning cavity, a temperature sensor is arranged at the bottom of the box.

[0038] In order to effectively realize the water inlet of the steam generator and avoid dry burning of the steam generator during the working process, a water level sensor is arranged in the steam generator.

[0039] Preferably, it also includes a three-way valve, the first end of which is connected to the lower end of the channel in the motor shaft, the second end of which is connected to the steam pipe, and the third end of which is connected to a vent pipe, on which a one-way valve is provided.

[0040] To improve the slag collection effect, the drain outlet is located in the middle of the side of the spray arm on the bottom wall of the tank, and the bottom wall of the tank is gradually inclined downward towards the drain outlet.

[0041] Compared with the prior art, the advantages of the present invention are as follows: the cleaning method of the cleaning machine in the present invention can use steam to expand the contaminants in the cleaning chamber, reduce the adhesion of the contaminants, and then rinse the expanded contaminants, thereby greatly reducing the difficulty of subsequent cleaning and improving the cleaning effect.

[0042] Furthermore, using steam to heat the sprayed water not only cavitates the water, creating bubbles and improving cleaning effectiveness, but also rapidly heats the water, reducing heating time and further enhancing cleaning results. Additionally, using steam to heat the water eliminates the need for a heating plate within the cleaning chamber, preventing scale buildup and allowing for more design flexibility in the lower part of the cleaning machine.

[0043] The cleaning machine that uses this cleaning method has cleaning performance and cleaning time that better meet user expectations. Attached Figure Description

[0044] Figure 1 This is a perspective view of the cleaning machine in an embodiment of the present invention.

[0045] Figure 2 This is a cross-sectional view of the cleaning machine in an embodiment of the present invention.

[0046] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0047] Figure 4 This diagram shows the optimal steam introduction time for different types of pollutants to achieve the best puffing effect in the embodiments of the present invention. Detailed Implementation

[0048] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0049] like Figures 1 to 3 As shown, the cleaning machine in this embodiment includes a housing 1, a spray arm 2, an impeller assembly 3, a motor 4, a water pump 5, a steam generator 6, and a three-way valve 8.

[0050] The housing 1 contains a cleaning chamber, and a drain outlet 11 is located on the bottom wall of the housing 1. To facilitate slag collection, a slag collection basket is installed below the housing 1, mounted on the drain outlet 11. For easy installation of the slag collection basket, a connecting portion typically extends downwards from the bottom wall of the housing 1 corresponding to the drain outlet 11, and the slag collection basket is installed within this connecting portion. A forced-flow pump is connected to the connecting portion. By activating the forced-flow pump, wastewater from the cleaning chamber is discharged, while particulate matter is collected in the slag collection basket. The user can remove the slag collection basket from the housing 1 to clean the slag.

[0051] The spray arm 2 is rotatably mounted in the housing 1. Typically, the spray arm 2 is elongated and consists of a lower housing and an upper housing joined together. The space between the lower and upper housings forms the internal flow channel of the spray arm 2. A water inlet 21, communicating with this flow channel, is provided on the wall of the spray arm 2. The water inlet 21 is typically located in the middle of the lower housing, allowing external water to enter the flow channel of the spray arm 2 through the water inlet 21. The spray arm 2 also has multiple spray holes 22 communicating with the flow channel. These spray holes are typically located on the top and side walls of the upper housing, allowing water entering the channel 41 of the spray arm 2 to be sprayed out from the spray holes 22 into the cleaning chamber.

[0052] The impeller assembly 3 is rotatably disposed below the spray arm 2 and is used to pump water from the bottom of the tank 1 from the inlet 21 into the spray arm 2.

[0053] The motor 4 is located at the bottom of the housing 1 and the motor shaft passes through the bottom wall of the housing 1 and is connected to the impeller assembly 3. When working, the motor 4 drives the impeller assembly 3 to rotate, thereby creating a negative pressure at the position of the impeller assembly 3. Under the action of the negative pressure, the water at the bottom of the housing 1 is pumped from the water inlet 21 to the spray arm 2. Under the centrifugal force of the impeller assembly 3 on the water, the water can be sprayed out from the spray nozzle of the spray arm 2. During the water spraying process, the spray arm 2 rotates based on the rotation of the impeller and the direction of the spray hole 22, thereby cleaning the items to be cleaned in the cleaning chamber evenly and effectively.

[0054] Water pump 5 is connected to drain outlet 11 via inlet pipe 51. In this embodiment, one end of inlet pipe 51 is connected to the inlet of water pump 5, and the other end of inlet pipe 51 is connected to the connection part of housing 1. Steam generator 6 is connected to outlet of water pump 5 via connecting pipe 61. Thus, when water pump 5 is working, it can pump water from housing 1 into steam generator 6 through drain outlet 11.

[0055] Additionally, a top plate 7 is provided on the top wall of the spray arm 2, which together with the top wall of the spray arm 2 forms a cavity 71. The top wall of the spray arm 2 forms the bottom wall of the cavity 71, and the top plate 7 forms the top wall of the cavity 71. The water spray holes 22 are located in the cavity 71 because they are situated in the top area of ​​the spray arm 2. A nozzle 72 is provided on the top plate 7 corresponding to the water spray holes 22. The motor shaft has a hollow interior forming a vertically penetrating channel 41, with the upper end of the channel 41 connected to the cavity 71. The steam output port of the steam generator 6 is connected to the lower end of the channel 41 via a steam pipe 62. Specifically, the connection between the steam pipe 62 and the channel 41 is achieved through a three-way valve 8. The first end of the three-way valve 8 is connected to the lower end of the channel 41 in the motor shaft, the second end of the three-way valve 8 is connected to the steam pipe 62, and the third end of the three-way valve 8 is connected to a vent pipe 9, on which a one-way valve 91 is provided. The on / off control of the steam pipe 62 and the vent pipe 9 can be achieved by controlling the opening and closing of the three-way valve 8. When the three-way valve 8 opens the steam pipe 62, the steam output from the steam generator 6 can enter the cavity 71. When the vent pipe 9 is open, outside air can enter the cavity 71, and due to the action of the one-way valve 91, the airflow in the channel 41 will not flow back out. During operation, the steam generated by the steam generator 6 can enter the channel 41 in the motor 4 through the steam pipe 62, and finally enter the cavity 71. The water sprayed from the spray nozzle of the spray arm 2 can be heated and cavitated by the steam in the cavity 71, thus forming heated cavitated water. The cavitated water is then sprayed out from the nozzle 72 on the top plate 7 into the cleaning chamber. Alternatively, air can be introduced into the cavity 71 through the air pipe 9 and the channel 41 of the motor 4, thereby cavitating the water sprayed from the spray arm 2 and then spraying it out into the cleaning chamber through the nozzle 72 on the top plate 7. Steam and air can also be introduced into the cavity 71 at the same time, thereby acting on the water sprayed from the spray arm 2 simultaneously.

[0056] Due to the steam generator 6, the water sprayed from the spray arm 2 can be effectively heated and cavitated by steam. This eliminates the need for an additional heating plate, avoiding scale buildup and providing more design space for the rational distribution of the lower structure of the cleaning machine. In this embodiment, the drain outlet 11 is located in the middle of the side of the spray arm 2 on the bottom wall of the housing 1, with the bottom wall of the housing 1 gradually sloping downwards towards the drain outlet 11. This allows the drain outlet 11 to be centrally located on the side of the spray arm 2, ensuring that the flow and force of the water falling into the drain outlet 11 during the cleaning process are symmetrical, achieving efficient slag collection.

[0057] In addition, a turbidity sensor is installed at the bottom of the housing 1 to detect the turbidity of contaminants in the cleaning chamber. The turbidity sensor is located inside the housing 1 near the drain outlet 11, because the wastewater after rinsing in the cleaning chamber will collect at the drain outlet 11, allowing for more accurate and stable turbidity values ​​to be obtained.

[0058] A temperature sensor is installed at the bottom of the tank 1. This temperature sensor can be set close to the turbidity sensor. The temperature sensor is used to detect whether the water temperature in the tank 1 has reached the target temperature set by the cleaning program.

[0059] To prevent dry burning within the steam generator 6, a water level sensor is installed. This sensor can be configured with both low and high water levels. When the water level in the steam generator 6 is detected to be below the low water level sensor, the water pump 5 is activated to inject water into the steam generator 6. When the water level in the steam generator 6 reaches the high water level sensor, the water pump 5 is deactivated. During cleaning processes requiring steam, the water injection into the steam generator 6 is cyclically controlled based on the water level sensor readings. Therefore, when the cleaning machine is performing cleaning operations and steam is needed, the water intake should be controlled according to the water consumption of the steam generator 6.

[0060] The aforementioned cleaning can be performed using the cleaning methods described below. Of course, other cleaning machines with steam supply capabilities can also be cleaned using these methods. The only requirement is that steam is delivered to the desired location. The steam generator 6 can also be supplied with water from an external water source.

[0061] In the cleaning process of a cleaning machine, steam can be used for cleaning. The cleaning methods using steam include the following.

[0062] The first cleaning method is as follows: After the cleaning machine starts cleaning, water is first circulated into the cleaning chamber for rinsing. Water from the bottom of the tank 1 is circulated into the spray arm 2 and sprayed out from the spray arm 2 to rinse the items to be cleaned in the cleaning chamber. Air is introduced into the cavity 71 above the spray arm 2 as needed to cavitate the water. After cavitation, the air bubbles in the cavitated water burst on the items to be cleaned, increasing the ability to carry pollutants. The rinsing time can be set as needed, such as 5 minutes. After rinsing, the turbidity value D of the cleaning water in the cleaning chamber is detected using a turbidity sensor, and the corresponding steam introduction time T is determined based on the turbidity value D. At this time, the drain pump 5 can be started, and the rinsed wastewater can be discharged through the drain outlet 11. Then, according to the determined steam introduction time T, steam is introduced into the cleaning chamber to expand and treat the contaminants inside the cleaning chamber. In this embodiment, the steam generator 6 is started to work. The steam generated by the steam generator 6 enters the cavity 71 above the spray arm 2 through the channel 41 in the motor shaft, and is discharged into the cleaning chamber from the nozzle 72 on the top plate 7. After the steam introduction is completed, the expanded contaminants in the cleaning chamber are rinsed with water.

[0063] The timing of steam introduction can be determined using different methods. For example, a preset steam introduction time can be used to correspond to different turbidity ranges, and then the corresponding preset steam introduction time can be determined as the steam introduction time based on the turbidity range in which the turbidity value is located.

[0064] The turbidity value-steam introduction time relationship curve can also be preset, and the corresponding steam introduction time can be determined according to the turbidity value and the relationship between the turbidity value and the steam introduction time curve.

[0065] In this embodiment, the cleaning machine uses the motor 4 to drive the spray arm 2 within the cleaning chamber to rotate, thus performing spray cleaning. Different contaminants, under the influence of water flow, exhibit varying properties that affect the operation of the motor 4. For example, protein-based contaminants will foam under the spray, resulting in a decrease in the power of the motor 4 during operation. Starch-based and oily contaminants, however, typically do not cause significant changes in the motor 4's operation. Therefore, the steam introduction time T can be determined by combining the obtained turbidity value with the power change of the motor 4. This method provides a more accurate steam introduction time.

[0066] During product development, experiments can be conducted to obtain the puffing effect of different types of contaminants under steam, thereby determining the optimal steam introduction time for different types of contaminants to achieve the best puffing effect. Contaminants inside cleaning machines typically include grease, starch, and protein-based contaminants, such as... Figure 4As shown, based on the experimental structure, the optimal steam introduction time for achieving the best puffing effect for oily contaminants is preset to T1, for protein contaminants to T2, and for starch contaminants to T3, where T1 < T2 < T3. Based on this, the steam introduction time can be determined according to the following cases based on the turbidity value D.

[0067] Scenario 1: When D ≤ D1; Since the turbidity value is relatively small, it is determined that the pollutants may not contain starch-based contaminants. In this case, the power of motor 4 needs further evaluation. If the power of motor 4 remains stable, it is determined that the pollutants do not contain protein, and therefore the contaminant is oil. Thus, the steam introduction time can be determined based on the optimal steam introduction time T1 corresponding to the best puffing effect for oil-based contaminants. The corresponding steam introduction time T is: T = (T3 - T1)D / D1 + T1; If the power of motor 4 remains stable, the corresponding steam introduction time T is: T = (T2 - T1)D / D1 + T1.

[0068] Scenario 2: When D1 < D ≤ D2; due to the relatively high turbidity value, it is determined that the pollutants contain starchy or protein-based pollutants. In this case, the power of motor 4 needs further evaluation. If the power of motor 4 remains stable, it indicates that there is essentially no protein in the pollutants, and the pollutants are starchy or contain both starch and oil. The specific steam introduction time is determined within the optimal steam introduction time range corresponding to starchy and oily pollutants, specifically T = (T3 - T1)D / (D2 - D1) + (4T1 - T3) / 3. If the power of motor 4 decreases, it indicates that the pollutants contain protein. Therefore, the specific steam introduction time can be determined within the optimal steam introduction time range corresponding to oily and protein-based pollutants, specifically T = (T2 - T1)D / (D2 - D1) + (4T1 - T2 / 3).

[0069] Case 3: When D > D2; if the power of motor 4 remains stable, the contaminant is determined to be starch or starch + oil, and the steam introduction time T = T3 is determined accordingly; if the power of motor 4 decreases, the contaminant is determined to be starch + protein or starch + protein + oil, and the steam introduction time T = T2 is determined accordingly.

[0070] If large contaminants are present at drain outlet 11, the turbidity sensor will typically detect data in the range of D > D2. In the presence of large contaminants, these particles will cover the surface of the filter screen at drain outlet 11, hindering water return. This will cause fluctuations in the power of motor 4. If the power fluctuation of motor 4 exceeds the set fluctuation threshold, it is determined that large contaminants are present. Water flow is then used to flush the contaminants. After flushing for a set time, drainage is initiated. After drainage, the flushing and turbidity detection processes are repeated. Then, based on the turbidity and motor 4 power levels, the steam introduction time into the cleaning chamber is determined. Steam is introduced into the cleaning chamber according to the specified time to expand the contaminants.

[0071] The aforementioned judgment on the stability of motor 4's power can be based on the fact that the fluctuation range of motor 4's power is within a small threshold range. The judgment on the decrease of motor 4's power can be based on the fact that motor 4's power continues to decrease within a set time period. The power fluctuation of motor 4 refers to the difference between the maximum and minimum power values ​​of motor 4 within a set time period.

[0072] The second cleaning method involves using an electric motor to drive the spray arm 2 within the cleaning chamber to rotate for spray cleaning. After the cleaning machine starts cleaning, high-temperature steam is introduced into the spray holes 22 of the spray arm 2. In this embodiment, the steam generator 6 is controlled, and the three-way valve 8 is controlled to open the steam pipe 62. The high-temperature steam generated by the steam generator 6 then enters the cavity 71 at the top of the spray arm 2 through the steam pipe 62 and the channel 41 in the motor shaft. The high-temperature steam entering the cavity 71 exchanges heat with the water sprayed from the spray holes 22 of the spray arm 2, causing the water sprayed from the top plate 7 to quickly reach the target temperature. At the same time, the steam can also cavitate the water sprayed from the spray arm 2, forming cavitated water. The cavitated high-temperature water is directly sprayed into the cleaning chamber, thereby cleaning the items to be cleaned within the cleaning chamber. Cavitation of the water improves the cleaning effect, while high-temperature steam rapidly heats the water sprayed from the spray arm 2. Compared to existing technologies that slowly heat the water inside the chamber 1 to the target temperature, heating the sprayed water with steam reduces cleaning waiting time and optimizes the user experience. During steam supply control, the flow rate of high-temperature steam and the water intake of the spray arm 2 are controlled to ensure the water sprayed into the cleaning chamber reaches the target temperature.

[0073] The third cleaning method involves using an electric motor to drive the spray arm 2 within the cleaning chamber to rotate for spray cleaning. After the cleaning machine starts cleaning, air is introduced into the spray nozzles 22 of the spray arm 2 to create cavitation water. The water temperature within the cleaning chamber is monitored in real time, and steam is introduced into the spray nozzles 22 of the spray arm 2 to heat the water sprayed from the spray arm 2. Steam supply is stopped until the water temperature in the cleaning chamber reaches the target temperature. In this embodiment, the three-way valve 8 simultaneously opens the vent pipe 9 and the steam pipe 62. Air is then introduced into the cavity 71 through the vent pipe 9 to cavitate the water sprayed from the spray arm 2, and steam is introduced into the cavity 71 through the steam pipe 62 to heat the water sprayed from the spray arm 2, gradually heating the water in the tank 1 until the water temperature in the tank 1 gradually rises to the target temperature.

[0074] When cleaning dishes, utensils, and other items, the cleaning process of the washing machine includes a pre-cleaning stage, a main cleaning stage, and a rinsing stage. Therefore, the first cleaning method mentioned above can be used in the pre-cleaning stage. During the pre-cleaning process, dishwashing powder or other detergents are typically not added; only the items to be cleaned are rinsed from the cleaning chamber. In existing technologies, water is usually heated to improve rinsing effectiveness, but this is slow and results in limited cleaning results. In this embodiment, the first cleaning method mentioned above is used in the pre-cleaning stage, which effectively expands the contaminants in the cleaning chamber, reducing their adhesion. This significantly improves the cleaning effect when rinsing the expanded contaminants. Furthermore, the expansion time of contaminants using high-temperature steam is relatively short, resulting in low power consumption and a short cleaning time.

[0075] After the pre-cleaning stage of drainage is completed, the main cleaning stage of cleaning work is carried out.

[0076] Depending on the specific needs, the second, third, or a combination of the two cleaning methods mentioned above may be used in the main cleaning phase.

[0077] When using the second and third cleaning methods in combination, the second cleaning method is used in both the initial and later stages of the cleaning process. During the main cleaning phase, a temperature sensor continuously monitors the temperature of the water falling back to the bottom of the tank 1 within the cleaning chamber. Initially, when using the second cleaning method, although the water sprayed from the spray arm 2 reaches the target temperature under the influence of high-temperature steam, the temperature of the water falling back to the bottom of the tank 1 is significantly lower than the target temperature due to the lower temperature of the cleaning chamber itself and the items being cleaned within it. As cleaning continues, the high-temperature steam continuously heats the sprayed water, and the water temperature at the bottom of the tank 1 gradually rises. When the water temperature in the cleaning chamber reaches the set temperature Ts, the second cleaning method is stopped, and the third cleaning method is initiated, where Ts < Tm, and Tm is the target temperature for the current main cleaning phase.

[0078] After the main washing stage is completed, the subsequent rinsing stage is carried out. This rinsing stage may include at least one rinsing process depending on the specific needs, including only at least one rinsing process of water inlet and drainage. During each rinsing process, steam and / or air are introduced into the cavity 71 on the upper part of the spray arm 2 according to the specific temperature requirements or cavitation water requirements.

[0079] When cleaning fragile and heat-sensitive items such as fruits and vegetables, only the air pipe 9 needs to be controlled to allow air to be supplied to the spray nozzle of the spray arm 2. This cavitation of the water sprayed from the spray arm 2 creates cavitation water with bubbles. The cavitation water is then sprayed out from the nozzle 72 on the top plate 7 to clean the fruits and vegetables waiting to be cleaned in the cleaning chamber.

[0080] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A cleaning method for a cleaning machine, characterized in that: After the cleaning machine starts the cleaning work, water is first supplied to the cleaning cavity to perform water flow flushing work, then the turbidity value D of the cleaning water in the cleaning cavity is detected and acquired, and the corresponding steam supply time T is determined according to the turbidity value D; steam is supplied to the cleaning cavity according to the determined steam supply time T to perform swelling treatment on the pollutants in the cleaning cavity; After the steam supply is completed, the swelled pollutants in the cleaning cavity are flushed by water flow; The cleaning machine drives the spray arm (2) in the cleaning cavity to rotate to perform spray cleaning work through the driving effect of the motor; On the basis of the turbidity value, the steam supply time T is determined in combination with the power change of the motor (4); The preset best steam supply time corresponding to the best swelling effect of the preset oil-based pollutants is T1, the preset best steam supply time corresponding to the best swelling effect of the preset protein-based pollutants is T2, and the preset best steam supply time corresponding to the best swelling effect of the preset starch-based pollutants is T3, wherein T1 < T2 < T3; Case 1, when D ≤ D1; if the power of the motor (4) remains stable, the corresponding steam supply time T is determined as: T = (T3-T1)D / D1+T1; if the power of the motor (4) decreases, the corresponding steam supply time T is determined as: T = (T2-T1)D / D1+T1; Case 2, when D1 < D ≤ D2; if the power of the motor (4) remains stable, the corresponding steam supply time T is determined as: T = (T3-T1)D / (D2-D1)+(4T1-T3) / 3; if the power of the motor (4) decreases, the corresponding steam supply time T is determined as: T = (T2-T1)D / (D2-D1)+(4T1-T2) / 3; Case 3, when D > D2; if the power of the motor (4) remains stable, the corresponding steam supply time T is determined as T3; if the power of the motor (4) decreases, the corresponding steam supply time T is determined as T2.

2. The cleaning method of a cleaning machine according to claim 1, characterized in that: The preset set steam supply time corresponding to different turbidity intervals is determined as the steam supply time according to the turbidity interval in which the turbidity value is located; Or a preset turbidity value-steam supply time relationship curve is determined, and the corresponding steam supply time is determined according to the turbidity value and the turbidity value-steam supply time curve relationship.

3. The cleaning method of a cleaning machine according to claim 1, characterized in that: If the power fluctuation of the motor (4) exceeds the preset fluctuation threshold, it is judged that there is a large amount of pollutants, and then the pollutants are flushed by water flow and drainage work is performed; after the drainage is completed, the water flow flushing and turbidity detection work are performed again.

4. A cleaning method of a cleaning machine, characterized by: The cleaning process of the cleaning machine includes a pre-cleaning stage, a main cleaning stage and a rinsing stage in sequence; The cleaning method of the cleaning machine in any one of claims 1 to 3 is used in the cleaning work in the pre-cleaning stage, and the cleaning work in the main cleaning stage is performed after the drainage in the pre-cleaning stage is completed; The second cleaning method and / or the third cleaning method are used in the cleaning work in the main cleaning stage; The second cleaning method is that the cleaning machine drives the spray arm (2) in the cleaning cavity to rotate to perform spray cleaning work through the driving effect of the motor; After the cleaning machine starts the cleaning work, high-temperature steam is supplied to the position of the water spraying hole (22) of the spraying arm (2), so that the water sprayed into the cleaning cavity is cavitation water reaching the target temperature; The third cleaning method is that the spraying arm (2) in the cleaning cavity is driven to rotate by the electric machine driving effect to perform the spraying cleaning work; After the cleaning machine starts the cleaning work, air is supplied to the position of the water spraying hole (22) of the spraying arm (2) to form cavitation water; the water temperature in the cleaning cavity is detected in real time, the steam is supplied to the position of the water spraying hole (22) of the spraying arm (2) to heat the water sprayed by the spraying arm (2), and the supply of the steam is controlled to stop until the water temperature in the cleaning cavity reaches the target temperature value.

5. The cleaning method of a cleaning machine according to claim 4, characterized in that: In the second cleaning method, the air supply amount of the high-temperature steam and the water inflow amount of the spraying arm (2) are controlled, so that the water sprayed into the cleaning cavity reaches the target temperature.

6. The cleaning method of a cleaning machine according to claim 4, characterized in that: In the cleaning work of the main cleaning stage, the second cleaning method is used in the early stage, and when the water temperature in the cleaning cavity reaches the set temperature Ts, the third cleaning method is used; Wherein Ts < Tm, Tm is the target temperature of the current main cleaning stage.

7. A cleaning machine applying the cleaning method according to any one of claims 1 to 6, comprising a box body (1) having a cleaning cavity, a drain port (11) being formed on the bottom wall of the box body (1); a spraying arm (2) arranged in the box body (1), the spraying arm (2) having a flow channel inside, a water inlet (21) and a water spraying hole (22) being formed on the wall of the spraying arm (2) and being communicated with the flow channel; a impeller assembly (3) rotatably arranged below the spraying arm (2) and used for pumping the water at the bottom of the box body (1) from the water inlet (21) to the spraying arm (2); a motor (4) arranged at the bottom of the box body (1) and having a motor shaft penetrating through the bottom wall of the box body (1) and connected with the impeller assembly (3); characterized in that further comprising a water pump (5) connected with the drain port (11) through a water inlet pipe (51); a steam generator (6) connected with the water pump (5) through a connecting pipe (61); a top plate (7) is arranged on the top wall of the spraying arm (2) to jointly enclose a cavity (71) with the top wall of the spraying arm (2), the water spraying hole (22) is located in the cavity (71), and a nozzle (72) is formed on the top plate (7) corresponding to the water spraying hole (22); a channel (41) is formed in the motor shaft and penetrates through the motor shaft from top to bottom, the upper end of the channel (41) is communicated with the cavity (71), and the steam outlet of the steam generator (6) is communicated with the lower end of the channel (41) through a steam pipe (62).

8. The cleaning machine of claim 7, wherein: A turbidity sensor is arranged on the bottom of the box body (1).

9. The cleaning machine of claim 8, wherein: The turbidity sensor is arranged on the box body (1) and close to the drain port (11).

10. The cleaning machine of claim 7, wherein: A temperature sensor is arranged on the bottom of the box body (1).

11. The cleaning machine of claim 7, wherein: A water level sensor is arranged in the steam generator (6).

12. The cleaning machine of any one of claims 7 to 11, wherein: Further comprising a three-way valve (8), a first end of the three-way valve (8) is connected with the lower end of the channel (41) in the motor shaft, a second end of the three-way valve (8) is connected with the steam pipe (62), a third end of the three-way valve (8) is connected with an air pipe (9), and a one-way valve (91) is arranged on the air pipe (9).

13. The cleaning machine of any one of claims 7 to 11, wherein: The drain port (11) is arranged in the middle of the bottom wall of the box (1) on the side of the setting position of the spray arm (2), and the bottom wall of the box (1) is gradually inclined downward to the direction of the drain port (11).

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